Therapeutic Idol reduction ameliorates amyloidosis and improves cognitive function in APP/PS1 mice
Open accessAbstract
Brain lipoprotein receptors have been shown to regulate the metabolism of ApoE and β-amyloid (Aβ) and are potential therapeutic targets for Alzheimer’s disease (AD). Previously, we identified E3 ubiquitin ligase IDOL as a negative regulator of brain lipoprotein receptors. Genetic ablation of Idol increases low-density lipoprotein receptor protein levels, which facilitates Aβ uptake and clearance by microglia. In this study, we utilized an antisense oligonucleotide (ASO) to reduce IDOL expression therapeutically in the brains of APP/PS1 male mice. ASO treatment led to decreased Aβ pathology and improved spatial learning and memory. Single-cell transcriptomic analysis of hippocampus revealed that IDOL inhibition upregulated lysosomal/phagocytic genes in microglia. Furthermore, clustering of microglia revealed that IDOL-ASO treatment shifted the composition of the microglia population by increasing the prevalence of disease-associated microglia. Our results suggest that reducing IDOL expression in the adult brain promotes the phagocytic clearance of Aβ and ameliorates Aβ-dependent pathology. Pharmacological inhibition of IDOL activity in the brain may represent a therapeutic strategy for the treatment of AD.
Verified 2026-10-19 · 3 references not checked yet
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Written from the paper’s full text.
TL;DR
In APP/PS1 male mice, intracerebroventricular antisense oligonucleotide knockdown of IDOL reduced amyloid plaque burden and improved Morris water maze performance. Single-cell hippocampal transcriptomics linked IDOL reduction to increased microglial lysosomal/phagocytic gene expression and a shift toward disease-associated microglia.
Key findings
- IDOL ASO showed an IC50 of 12.5 µg/mouse and an estimated half-life of 9 weeks; a single 40-µg i.c.v. dose reduced IDOL mRNA by at least 80% across hippocampus, cortex, thalamus, and cerebellum, and increased LDLR, VLDLR, and ApoER2 protein levels.
- In APP/PS1 mice, IDOL ASO reduced Aβ plaque area by >50% and fibrillar plaque load by >50%, lowered soluble and insoluble Aβ40/Aβ42, reduced total amyloid and ApoE by Western blot, and decreased plaque density, average plaque size, and large plaques (>1,000 µm²; plaques >2,000 µm² were rarely observed in the ASO group).
- IDOL ASO reduced plaque-associated neuritic dystrophy (LAMP1 and APP staining), reduced GFAP-positive reactive astrocytes, and decreased microglial cell body size around plaques; Iba1-positive area normalized to plaque area did not differ between groups.
- Morris water maze performance improved in ASO-treated APP/PS1 mice (less escape latency on days 4 and 5; more time and distance in the target quadrant), with no difference in fear conditioning; scRNA-seq of 14,682 hippocampal cells (6,888 PBS, 7,794 ASO) showed microglial lysosomal pathway enrichment and upregulated Ctsb, Ctsd, and CD63, plus a shift toward DAM-like microglia (22.45% PBS vs 35.36% ASO; P = 0.04154, Fisher exact test).
Methods
- Male C57BL/6J and APP/PS1 mice received i.c.v. IDOL ASO or PBS; dosing studies used n = 5/group, pathology cohorts used n = 8–10/group, and behavior cohorts used n = 12/group, with treatment starting at 3 months and boosters at 6 and 9 months.
- Outcomes included qPCR, Western blot, Aβ40/Aβ42 ELISA, immunohistochemistry/immunofluorescence for plaques, neuritic dystrophy, astrocytes, and microglia, plus Morris water maze and fear conditioning.
- Hippocampal single-cell RNA sequencing used Drop-seq with n = 3/group, followed by Seurat clustering (UMAP/t-SNE), differential expression at FDR < 0.05, and pathway analysis.
Limitations
- Stated in the paper: mechanisms by which increased LDLR enhances microglial phagocytosis remain to be clarified; whether effects depend on ApoE and different ApoE alleles requires future experiments; the exact roles of the identified microglial subgroups are unclear; and a contribution of neuronal ApoER2 to neuroprotection cannot be ruled out.
- Evident from the text: all APP/PS1 experiments used male mice, so sex-specific effects were not assessed.
- Evident from the text: the scRNA-seq findings are correlative and based on n = 3 mice/group; cell-type-specific IDOL deletion experiments were described as ongoing rather than completed.
Model-written summary. Check it against the paper before relying on it.
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Claims the paper makes
25 of 41 cited sources checked · 18 supported · 0 flagged · accuracy not yet measured
- Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
ApoE independently influences several key factors that drive pathogenesis of Alzheimer's disease, including β-amyloidosis, tauopathy, and synaptic dysfunction.
“ApoE has been shown to independently influence several key factors that drive pathogenesis of AD, including 𝛃 -amyloidosis, tauopathy, and synaptic dysfunction (1-3).”
Quote in the paperNot a substantial claim2 of 3 sources checked- cites [1] 1. Corder EH, Saunders AM, Strittmatter WJ, Schmechel DE, Gaskell PC, Small GW, Roses AD, Haines JL, Pericak-Vance MA. 1993. Gene dose of apolipoprotein E type 4 allele and the risk of Alzheimer's disease in late onset families. Science 261:921-923. https://doi.org/10.1126/science.8346443. source
- cites [2] 2. Liu CC, Kanekiyo T, Xu H, Bu G. 2013. Apolipoprotein E and Alzheimer disease: risk, mechanisms, and therapy. Nat Rev Neurol 9:106-118. https://doi.org/10.1038/nrneurol.2012.263. source
- cites [3] 3. Shi Y, Alzheimer's Disease Neuroimaging Initiative, Yamada K, Liddelow SA, Smith ST, Zhao L, Luo W, Tsai RM, Spina S, Grinberg LT, Rojas JC, Gallardo G, Wang K, Roh J, Robinson G, Finn MB, Jiang H, Sullivan PM, Baufeld C, Wood MW, Sutphen C, McCue L, Xiong C, Del-Aguila JL, Morris JC, Cruchaga C, Alzheimer's DNI, Fagan AM, Miller BL, Boxer AL, Seeley WW, Butovsky O, Barres BA, Paul SM, Holtzman DM. 2017. ApoE4 markedly exacerbates tau-mediated neurodegeneration in a mouse model of tauopathy. Nature 549:523-527. https://doi.org/10.1038/nature24016. source
The paper’s Abstract says ApoE influences Aβ deposition and reports that ApoE affects tau pathogenesis independently of Aβ pathology. It also reports neuronal injury and reduced neurite arborization, but the passages do not establish an independent effect on synaptic dysfunction; that part of the cited sentence is unsupported by this source. (LLM, conf=0.85)
Experimental — accuracy not yet measured
- Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
Lowering ApoE levels prior to the formation of Aβ plaque in APP/PS1 mice reduces Aβ plaque pathology.
“lowering ApoE levels prior to the formation of A 𝛃 plaque in APP/PS1 mice reduces A 𝛃 plaque pathology (4).”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [4] 4. Huynh TV, Liao F, Francis CM, Robinson GO, Serrano JR, Jiang H, Roh J, Finn MB, Sullivan PM, Esparza TJ, Stewart FR, Mahan TE, Ulrich JD, Cole T, Holtzman DM. 2017. Age-dependent effects of apoE reduction using antisense oligonucleotides in a model of beta-amyloidosis. Neuron 96: 1013-1023. https://doi.org/10.1016/j.neuron.2017.11.014. source
- Findingcitation§ RESULTS · p. 10
Subgroups 2 and 3 resembled disease-associated microglia (DAM), with high expression of Cst7, Trem2, and ApoE.
“whereas subgroups 2 and 3 resembled disease-associated microglia (DAM), with high expression of marker genes such as Cst7 , Trem2 , and ApoE (23)”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [23] 23. Keren-Shaul H, Spinrad A, Weiner A, Matcovitch-Natan O, Dvir-Szternfeld R, Ulland TK, David E, Baruch K, Lara-Astaiso D, Toth B, Itzkovitz S, Colonna M, Schwartz M, Amit I. 2017. A unique microglia type associated with restricting development of Alzheimer's disease. Cell 169: 1276-1290. https://doi.org/10.1016/j.cell.2017.05.018. source
- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
ApoE impairs Aβ clearance from the brain interstitial fluid.
“and to impair its clearance from the brain interstitial fluid (6).”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [6] 6. Castellano JM, Kim J, Stewart FR, Jiang H, DeMattos RB, Patterson BW, Fagan AM, Morris JC, Mawuenyega KG, Cruchaga C, Goate AM, Bales KR, Paul SM, Bateman RJ, Holtzman DM. 2011. Human apoE isoforms differentially regulate brain amyloid𝛃 peptide clearance. Sci Transl Med 3:89ra57. https://doi.org/10.1126/scitranslmed.3002156. source
The Results section reports reduced Aβ clearance from brain interstitial fluid in mice expressing apoE4 compared with mice expressing apoE3 or apoE2. The claim omits that isoform-specific comparison and instead says apoE generally impairs clearance; the reported experiment does not establish that broader claim. (LLM, conf=0.88)
Experimental — accuracy not yet measured
- Premisecitation§ DISCUSSION · p. 15
Overexpression of the LDLR in the brain enhances Aβ clearance.
“overexpression of the LDLR in the brain enhances A 𝛃 clearance”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [8] 8. Kim J, Castellano JM, Jiang H, Basak JM, Parsadanian M, Pham V, Mason SM, Paul SM, Holtzman DM. 2009. Overexpression of low-density lipoprotein receptor in the brain markedly inhibits amyloid deposition and increases extracellular A beta clearance. Neuron 64:632-644. https://doi .org/10.1016/j.neuron.2009.11.013. source
- Premisecitation§ DISCUSSION · p. 15
E3 ubiquitin ligase IDOL is a negative regulator of LDLR protein levels in microglia and neurons.
“We previously identified E3 ubiquitin ligase IDOL as a negative regulator of LDLR proteins levels in microglia and neurons (9).”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [9] 9. Choi J, Gao J, Kim J, Hong C, Kim J, Tontonoz P. 2015. The E3 ubiquitin ligase Idol controls brain LDL receptor expression, ApoE clearance, and A 𝛃 amyloidosis. Sci Transl Med 7:314ra184. https://doi.org/10.1126/ scitranslmed.aad1904. source
- Interpretationcitation§ DISCUSSION · p. 15
APOE alleles contribute to human AD risk by differentially regulating clearance of Aβ from the brain.
“suggesting that APOE alleles contribute to human AD risk by differentially regulating clearance of A 𝛃 from the brain”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [6] 6. Castellano JM, Kim J, Stewart FR, Jiang H, DeMattos RB, Patterson BW, Fagan AM, Morris JC, Mawuenyega KG, Cruchaga C, Goate AM, Bales KR, Paul SM, Bateman RJ, Holtzman DM. 2011. Human apoE isoforms differentially regulate brain amyloid𝛃 peptide clearance. Sci Transl Med 3:89ra57. https://doi.org/10.1126/scitranslmed.3002156. source
- Premisecitation§ DISCUSSION · p. 15
Overexpression of the LDLR in the brain decreases Aβ deposition.
“overexpression of the LDLR in the brain enhances A 𝛃 clearance and decreases A 𝛃 deposition (8)”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [8] 8. Kim J, Castellano JM, Jiang H, Basak JM, Parsadanian M, Pham V, Mason SM, Paul SM, Holtzman DM. 2009. Overexpression of low-density lipoprotein receptor in the brain markedly inhibits amyloid deposition and increases extracellular A beta clearance. Neuron 64:632-644. https://doi .org/10.1016/j.neuron.2009.11.013. source
- Findingown data§ RESULTS · p. 6
Plaques larger than 2,000 μm2 were only rarely observed in ASO group.
“and plaques larger than 2,000 𝛍 m 2 were only rarely observed in the ASO group (Fig. 2G).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 3
ASO was taken up by both microglia and neurons.
“This analysis showed that the ASO was taken up by both microglia and neurons.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Findingown data§ RESULTS · p. 6
In probe trials, ASO-treated group spent more time in the quadrant of the submerged platform.
“The ASO-treated group spent more time and traveled longer distances (Fig. 5B) in the quadrant of the submerged platform.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 3
Knockdown of IDOL was seen in all brain regions examined, including hippocampus, cortex, thalamus, and cerebellum.
“knockdown of IDOL was seen in all the brain regions examined, including the hippocampus, cortex, thalamus, and cerebellum”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Findingown data§ RESULTS · p. 10
IDOL-ASO treatment upregulated lysosomal/phagocytic genes, such as cathepsins Ctsb and Ctsd and CD63.
“IDOL-ASO treatment upregulated lysosomal/phagocytic genes, such as those for cathepsins ( Ctsb and Ctsd ) and CD63”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 3
IDOL ASO treatment reduced Aβ40 load in both soluble and insoluble fractions in APP/PS1 mice.
“IDOL ASO treatment reduced A 𝛃 40 and A 𝛃 42 load in both soluble and insoluble fractions in APP/PS1 mice (Fig. 2C and D).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 3
Protein levels of IDOL substrates-LDLR, VLDLR, and ApoER2-were all increased in the brains of IDOL ASO-treated mice.
“the protein level of IDOL substrates-LDLR, VLDLR, and ApoER2-were all increased in the brains of IDOL ASO-treated mice”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Findingown data§ RESULTS · p. 10
Known marker genes were uniquely expressed in their respective clusters, such as C1qc for microglia and Snap25 for neurons.
“we highlighted known marker genes for each cell type and found these key genes to be uniquely expressed in their respective clusters, such as C1qc for microglia and Snap25 for neurons (Fig. 6C to F).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 6
ASO-treated group required less time to reach the platform compared to control group on days 4 and 5 in Morris water maze.
“The ASO-treated group required less time to reach the platform compared to the control group on days 4 and 5 (Fig. 5A).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 10
Lysosomal pathway was the top enriched biological pathway in microglia.
“Annotation of the DEGs with curated biological pathways revealed the lysosomal pathway as the top enriched biological pathway in microglia.”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 7
ASO-treated mice were not different from control mice in ability to memorize association between shock and auditory cue.
“or auditory cue (Fig. 5E, right).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 7
Both groups of APP/PS1 mice displayed similar freezing behavior during fear conditioning training.
“Both groups of mice displayed similar freezing behavior during training (Fig. 5D).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 3
Aβ plaque area in IDOL ASO-treated APP/PS1 mice was reduced >50% compared to controls.
“A 𝛃 plaque area in IDOL ASO-treated APP/PS1 mice was reduced > 50% compared to controls (Fig. 2A).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 7
ASO-treated mice were not different from control mice in ability to memorize association between shock and context.
“ASO-treated mice were not different from control mice in their ability to memorize the association between shock and the context (Fig. 5E, left)”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 6
Analysis of Iba1-positive area corrected with plaque area did not reveal differences between treatment and control groups.
“when corrected with plaque area, analysis of the Iba1-positive area did not reveal differences between treatment and control groups (Fig. 4B).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 3
Fibrillar plaque load using X-34 dye was reduced >50% in ASO-treated group.
“Quantification of fibrillar plaque load using X-34 dye also showed a marked reduction ( > 50%) in the ASO-treated group (Fig. 2B).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 10
Microglia and oligodendrocytes had the largest numbers of DEGs between PBS and ASO groups.
“Microglia and oligodendrocytes had the largest numbers of DEGs between the PBS and ASO groups.”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 6
In probe trials, ASO-treated group traveled longer distances in the quadrant of the submerged platform.
“The ASO-treated group spent more time and traveled longer distances (Fig. 5B) in the quadrant of the submerged platform.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 6
IDOL ASO group had reduced plaque density compared to controls.
“We found reduced plaque density and average size in the IDOL ASO group compared to controls (Fig. 2F).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 6
IDOL ASO-treated mice showed a reduction in the volume of plaque-associated dystrophic neurites (APP).
“again found a reduction in the volume of plaque-associated dystrophic neurites in IDOL ASO-treated mice (Fig. 3B).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 6
There was a shift in the size distribution of plaques between groups.
“We also observed a shift in the size distribution of the plaques between groups.”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 10
Separation of subgroups 0 and 3 from subgroups 1 and 2 was mainly due to differential expression of inflammatory genes, such as Il1a, Il1b, and Tnf.
“The separation of subgroups 0 and 3 from subgroups 1 and 2 was mainly due to differential expression of inflammatory genes, such as the cytokine genes Il1a , Il1b , and Tnf”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 6
IDOL ASO group had fewer GFAP-positive astrocytes than controls.
“The IDOL ASO group had fewer GFAP-positive astrocytes than controls (Fig. 4A)”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 6
IDOL ASO group had reduced average plaque size compared to controls.
“We found reduced plaque density and average size in the IDOL ASO group compared to controls (Fig. 2F).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 3
IDOL ASO treatment reduced Aβ42 load in both soluble and insoluble fractions in APP/PS1 mice.
“IDOL ASO treatment reduced A 𝛃 40 and A 𝛃 42 load in both soluble and insoluble fractions in APP/PS1 mice (Fig. 2C and D).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 6
IDOL ASO-treated mice showed a reduction in the volume of dystrophic neurites (LAMP1).
“IDOL ASO-treated mice showed a reduction in the volume of dystrophic neurites (Fig. 3A).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 3
IDOL ASO treatment did not affect cognitive performance of wild-type mice in contextual fear conditioning and Morris water maze.
“When evaluated in contextual fear conditioning and the Morris water maze, IDOL ASO treatment did not affect the cognitive performance of wild-type mice (Fig. 1E and F).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Findingown data§ RESULTS · p. 10
IDOL-ASO treatment shifted microglia population to a higher proportion of DAM-like subgroups 2 and 3 (22.45% PBS vs 35.36% ASO; P=0.04154 Fisher exact).
“IDOL-ASO treatment shifted the microglia population to a higher proportion of DAMlike subgroups 2 and 3 (22.45% in PBS group versus 35.36% in ASO group; P = 0.04154 [Fisher exact test]) (Fig. 7A).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 3
A single bolus dose of 40 μg of IDOL ASO reduced IDOL mRNA level by at least 80% relative to controls by qPCR.
“A single bolus dose of 40 𝛍 g of IDOL ASO reduced IDOL mRNA level by at least 80% relative to controls by qPCR”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Findingown data§ RESULTS · p. 3
IDOL ASO showed high potency with half-maximal inhibitory concentration (IC50) of 12.5 μg/mice.
“IDOL ASO showed high potency with half-maximal inhibitory concentration (IC 50 ) of 12.5 𝛍 g/mice”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Findingown data§ RESULTS · p. 3
Western blot analysis of RIPA fractions confirmed IDOL ASO treatment led to reduction of total amyloid species.
“Western blot analysis of RIPA fractions of brain lysates further confirmed that IDOL ASO treatment led to reduction of total amyloid species”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 10
IDOL expression level was effectively reduced by ASO treatment.
“and that its expression level was effectively reduced by ASO treatment (data not shown).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 3
IDOL ASO has prolonged stability with an estimated half-life (t1/2) of 9 weeks.
“and prolonged stability with an estimated half-life ( t 1/2 ) of 9 weeks”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Findingown data§ RESULTS · p. 10
There were no clear clustering differences between PBS and ASO groups.
“and there were no clear clustering differences between the PBS and ASO groups (Fig. 6B).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 10
Microglia in ASO group displayed higher expression levels of DAM markers, including B2m, Ctsb, Ctsd, Lpl, and Cd63.
“microglia in the ASO group displayed higher expression levels of DAM markers, including B2m , Ctsb , Ctsd , Lpl , and Cd63 (Table 1).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 10
Subgroups 0 and 1 resembled homeostatic microglia, with high expression of P2ry12 and Cx3cr1.
“The gene expression patterns of subgroups 0 and 1 resembled the signatures of homeostatic microglia, with high expression of marker genes such as P2ry12 and Cx3cr1”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 10
IDOL was highly expressed in microglia.
“we confirmed that IDOL was highly expressed in microglia”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 10
Microglia reclustered into four distinct subgroups.
“identified four distinct subgroups (Fig. 7A)”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 6
Total area covered by larger plaques (>1,000 μm2) was dramatically reduced in ASO group.
“The total area covered by larger plaques ( > 1,000 𝛍 m 2 ) was dramatically reduced”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
IDOL-ASO treatment shifted the composition of the microglia population by increasing the prevalence of disease-associated microglia.
“clustering of microglia revealed that IDOL-ASO treatment shifted the composition of the microglia population by increasing the prevalence of disease-associated microglia.”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
ASO treatment improved spatial learning and memory.
“and improved spatial learning and memory.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ DISCUSSION · p. 15
ASO treatment increased the expression of lysosomal/phagocytic cell-related genes in microglia in vivo.
“our scRNA-seq data showed that ASO treatment increased the expression of lysosomal/ phagocytic cell-related genes in microglia in vivo”
Quote in the paperSubstantial claim - Findingown data§ DISCUSSION · p. 15
IDOL inhibition led to a decrease in neuritic dystrophy around the plaques in adult APP/PS1 mice.
“a decrease in neuritic dystrophy around the plaques”
Quote in the paperSubstantial claim - Findingown data§ RESULTS · p. 10
ASO treatment changed expression of genes enriched in oxidative phosphorylation pathway in subiculum neurons (mostly pyramidal cells).
“the oxidative phosphorylation pathway in subiculum neurons (mostly pyramidal cells)”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ DISCUSSION · p. 15
Within each of these subtypes, we identified subgroups with different expressions of inflammatory genes, such as Il1b and Tnfa.
“Within each of these subtypes, we also identified subgroups with different expressions of inflammatory genes, such as Il1b and Tnfa .”
Quote in the paperNot a substantial claim - Findingown data§ DISCUSSION · p. 15
We detected two previously identified microglia subtypes: homeostatic microglia (subgroups 0 and 1) and DAM (subgroups 2 and 3).
“we detected two previously identified subtypes: the homeostatic microglia (subgroups 0 and 1) and DAM (subgroups 2 and 3).”
Quote in the paperNot a substantial claim - Findingown data§ RESULTS · p. 13
The t-SNE plot shows no clear separation of microglia subtypes by treatment group.
“t-SNE plot shows no clear separation of microglia subtypes by treatment group.”
Quote in the paperNot a substantial claim - Findingown data§ DISCUSSION · p. 16
Inflammatory cytokine genes (Il1a, Il1b, and Tnfa) were positively associated with the DAM-associated gene Csf1 in our study.
“inflammatory cytokine genes ( Il1a , Il1b , and Tnfa ) were positively associated with the DAM-associated gene Csf1 in our study (Fig. 6B).”
Quote in the paperNot a substantial claim- Rests on an assumption: CSF-1 is a key regulator of inflammatory responses in the brain.
- Findingown data§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
ASO treatment led to decreased Aβ pathology.
“ASO treatment led to decreased A 𝛃 pathology”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Findingown data§ RESULTS · p. 10
ASO treatment changed expression of genes enriched in Wnt signaling pathway in Cajal-Retzius neurons.
“ASO treatment changed the expression of genes enriched End in the Wnt signaling pathway in Cajal-Retzius neurons”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
Single-cell transcriptomic analysis of hippocampus revealed that IDOL inhibition upregulated lysosomal/phagocytic genes in microglia.
“Singlecell transcriptomic analysis of hippocampus revealed that IDOL inhibition upregulated lysosomal/phagocytic genes in microglia.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ RESULTS · p. 14
The t-SNE plot shows no clear separation of neuronal subtypes by treatment group.
“t-SNE plot showing no clear separation of neuronal subtypes by treatment group.”
Quote in the paperNot a substantial claim - Findingown data§ RESULTS · p. 10
ASO treatment changed expression of genes enriched in homeostatic responses in interneurons.
“and the homeostatic responses in interneurons (Table 1).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Findingown data§ DISCUSSION · p. 16
Both homeostatic microglia and DAM can be further divided into subgroups with different Csf1 expression levels.
“Our result showed both homeostatic microglia and DAM can be further divided into subgroups with different Csf1 expression levels (Fig. 6B).”
Quote in the paperNot a substantial claim - Findingown data§ DISCUSSION · p. 15
IDOL-ASO treatment shifted the microglial populations to a higher proportion of DAM-like subgroups.
“IDOL-ASO treatment shifted the microglial populations to a higher proportion of DAM-like subgroups (Fig. 6)”
Quote in the paperSubstantial claim - Findingown data§ DISCUSSION · p. 15
IDOL inhibition led to a reduction in Aβ pathology in adult APP/PS1 mice.
“IDOL inhibition led to a reduction in A 𝛃 pathology”
- Also stated in: § DISCUSSION · p. 15 · plain
“ASO-treated APP/PS1 mice had lower levels of A 𝛃 and plaque deposition (Fig. 1 and 2)”
Quote in the paperSubstantial claim - Also stated in: § DISCUSSION · p. 15 · plain
- Findingown data§ DISCUSSION · p. 16
Our scRNAseq results yielded only a small number of DEGs in neurons between PBS and ASO groups when comparing to microglia.
“Our scRNAseq results yielded only small number of DEGs in neurons between PBS and ASO groups when comparing to microglia”
Quote in the paperSubstantial claim - Findingown data§ DISCUSSION · p. 16
IDOL ASO treatment increased brain ApoER2 levels in our study.
“IDOL ASO treatment increased brain ApoER2 levels in our study (Fig. 1C).”
Quote in the paperNot a substantial claim - Interpretationown data§ RESULTS · p. 10
Knockdown of IDOL enhanced phagocytic function of microglia in vivo.
“strongly suggesting that knockdown of IDOL enhanced phagocytic function of microglia in vivo (Table 1).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Interpretationown data§ RESULTS · p. 6
IDOL inhibition in brain ameliorates plaque-associated neuritic dystrophy.
“These results suggest that IDOL inhibition in brain ameliorates plaque-associated neuritic dystrophy.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Premisecitation§ DISCUSSION · p. 15
LDLR deficiency is associated with increased Aβ deposition in Tg2576 APP-transgenic mice.
“LDLR deficiency is associated with increased A 𝛃 deposition in Tg2576 APP-transgenic mice (24, 25)”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [24] 24. Cao D, Fukuchi K, Wan H, Kim H, Li L. 2006. Lack of LDL receptor aggravates learning deficits and amyloid deposits in Alzheimer transgenic mice. Neurobiol Aging 27:1632-1643. https://doi.org/10.1016/j .neurobiolaging.2005.09.011. source
- cites [25] 25. Katsouri L, Georgopoulos S. 2011. Lack of LDL receptor enhances amyloid deposition and decreases glial response in an Alzheimer's disease mouse model. PLoS One 6:e21880. https://doi.org/10.1371/journal.pone .0021880. source
- Interpretationown data§ DISCUSSION · p. 15
Pharmacologically inhibiting IDOL could be a feasible approach to ameliorate Aβ-related pathology.
“This study suggests that pharmacologically inhibiting IDOL could be a feasible approach to ameliorate A 𝛃 -related pathology.”
Quote in the paperSubstantial claim - Interpretationreasoning§ DISCUSSION · p. 15
The IDOL-LDLR pathway regulates the phagocytotic function in microglia in response to Aβ challenge.
“These findings suggest that the IDOL-LDLR pathway regulates the phagocytotic function in microglia in response to A 𝛃 challenge.”
Quote in the paperSubstantial claim- Rests on an assumption: Loss of IDOL in microglia enhances the uptake and clearance of Aβ.
- Interpretationreasoning§ DISCUSSION · p. 15
Enhancing Aβ clearance may be a therapeutic strategy for AD prevention and treatment.
“enhancing A 𝛃 clearance may be a therapeutic strategy for AD prevention and treatment”
Quote in the paperSubstantial claim - Premisecitation§ DISCUSSION · p. 15
ApoE serves as ligand for TREM2.
“ApoE also serves as ligand for TREM2 (32)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [32] 32. Yeh FL, Wang Y, Tom I, Gonzalez LC, Sheng M. 2016. TREM2 binds to apolipoproteins, including APOE and CLU/APOJ, and thereby facilitates uptake of amyloid-beta by microglia. Neuron 91:328-340. https://doi .org/10.1016/j.neuron.2016.06.015. source
- Interpretationreasoning§ RESULTS · p. 10
Shift in microglial populations in IDOL-ASO-treated mice could plausibly be responsible for reduced amyloid plaque load.
“Thus, this shift in microglial populations in IDOL-ASO-treated mice could plausibly be responsible for the reduced amyloid plaque load.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Interpretationcitation§ DISCUSSION · p. 15
Increasing LDLR levels in brain cells could be beneficial in AD.
“These findings suggest that increasing LDLR levels in brain cells could be beneficial in AD”
Quote in the paperSubstantial claim - Interpretationreasoning§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2
Pharmacological inhibition of IDOL activity in the brain may represent a therapeutic strategy for the treatment of Alzheimer's disease.
“Pharmacological inhibition of IDOL activity in the brain may represent a therapeutic strategy for the treatment of AD.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
- Interpretationown data§ DISCUSSION · p. 16
Knockdown of IDOL has a more prominent impact on microglial functions.
“suggesting that knockdown of IDOL has more a prominent impact on microglial functions.”
Quote in the paperNot a substantial claim
- May combine two claims. 18
- Classified as probably not a substantial claim. 24
- The quote only partly states this claim. 2
May combine two claims.
Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 3IDOL is an E3 ubiquitin ligase that acts as a negative regulator of LDLR in microglia.
“We previously identified E3 ubiquitin ligase IDOL as a negative regulator of LDLR in microglia.”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [9] 9. Choi J, Gao J, Kim J, Hong C, Kim J, Tontonoz P. 2015. The E3 ubiquitin ligase Idol controls brain LDL receptor expression, ApoE clearance, and A 𝛃 amyloidosis. Sci Transl Med 7:314ra184. https://doi.org/10.1126/ scitranslmed.aad1904. source
May combine two claims.
Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 3Loss of IDOL in microglia increases LDLR protein levels, which in turn facilitates ApoE and Aβ uptake and clearance by microglia.
“Loss of IDOL in microglia increases LDLR protein levels, which in turn facilitates ApoE and A 𝛃 uptake and clearance by microglia.”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [9] 9. Choi J, Gao J, Kim J, Hong C, Kim J, Tontonoz P. 2015. The E3 ubiquitin ligase Idol controls brain LDL receptor expression, ApoE clearance, and A 𝛃 amyloidosis. Sci Transl Med 7:314ra184. https://doi.org/10.1126/ scitranslmed.aad1904. source
May combine two claims.
Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 3Ablation of IDOL in both male and female APP/PS1 mice led to decreased soluble and insoluble Aβ, reduced amyloid plaque burden, and ameliorated neuroinflammation.
“Ablation of IDOL in both male and female APP/PS1 mice-a transgenic mouse model of A 𝛃 amyloidosis-led to decreased soluble and insoluble A 𝛃 , reduced amyloid plaque burden, and ameliorated neuroinflammation (9).”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [9] 9. Choi J, Gao J, Kim J, Hong C, Kim J, Tontonoz P. 2015. The E3 ubiquitin ligase Idol controls brain LDL receptor expression, ApoE clearance, and A 𝛃 amyloidosis. Sci Transl Med 7:314ra184. https://doi.org/10.1126/ scitranslmed.aad1904. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 15DAM associates with amyloid plaques.
“DAM has been shown to associate with amyloid plaques”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [23] 23. Keren-Shaul H, Spinrad A, Weiner A, Matcovitch-Natan O, Dvir-Szternfeld R, Ulland TK, David E, Baruch K, Lara-Astaiso D, Toth B, Itzkovitz S, Colonna M, Schwartz M, Amit I. 2017. A unique microglia type associated with restricting development of Alzheimer's disease. Cell 169: 1276-1290. https://doi.org/10.1016/j.cell.2017.05.018. source
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Premisecitation§ DISCUSSION · p. 15The existence of DAM in mice and humans has recently been confirmed in tauopathy AD models, aging, and other neurodegenerative diseases such as ALS and multiple sclerosis.
“The existence of DAM in mice and humans has recently been confirmed in tauopathy AD models (26, 27), aging (27, 28), and other neurodegenerative diseases, such as amyotrophic lateral sclerosis (ALS) (29) and multiple sclerosis (30).”
Quote in the paperNot a substantial claim4 of 5 sources checked- cites [26] 26. Friedman BA, Srinivasan K, Ayalon G, Meilandt WJ, Lin H, Huntley MA, Cao Y, Lee SH, Haddick PCG, Ngu H, Modrusan Z, Larson JL, Kaminker JS, van der Brug MP, Hansen DV. 2018. Diverse brain myeloid expression profiles reveal distinct microglial activation states and aspects of Alzheimer's disease not evident in mouse models. Cell Rep 22:832-847. https://doi.org/10.1016/j.celrep.2017.12.066. source
Checked before — its earlier verdict is held back until a new check runs.
- cites [27] 27. Mrdjen D, Pavlovic A, Hartmann FJ, Schreiner B, Utz SG, Leung BP, Lelios I, Heppner FL, Kipnis J, Merkler D, Greter M, Becher B. 2018. Highdimensional single-cell mapping of central nervous system immune cells reveals distinct myeloid subsets in health, aging, and disease. Immunity 48:380-395. https://doi.org/10.1016/j.immuni.2018.01.011. source
- cites [28] 28. Olah M, Patrick E, Villani AC, Xu J, White CC, Ryan KJ, Piehowski P, Kapasi A, Nejad P, Cimpean M, Connor S, Yung CJ, Frangieh M, McHenry A, Elyaman W, Petyuk V, Schneider JA, Bennett DA, De Jager PL, Bradshaw EM. 2018. A transcriptomic atlas of aged human microglia. Nat Commun 9:539. https://doi.org/10.1038/s41467-018-02926-5. source
This source is cited for the aging portion of the sentence. Its Results section ('Identification of human microglia genes affected by aging'; page unavailable) reports age-related changes in human microglia, and its Discussion describes a distinctive aged-human-microglia phenotype. It does not identify that phenotype as DAM or confirm DAM in mice; the disease examples are assigned to other citations in the sentence. (LLM, conf=0.86)
Experimental — accuracy not yet measured - cites [29] 29. Spiller KJ, Restrepo CR, Khan T, Dominique MA, Fang TC, Canter RG, Roberts CJ, Miller KR, Ransohoff RM, Trojanowski JQ, Lee VM. 2018. Microglia-mediated recovery from ALS-relevant motor neuron degeneration in a mouse model of TDP-43 proteinopathy. Nat Neurosci 21: 329-340. https://doi.org/10.1038/s41593-018-0083-7. source
The Results section on transcriptomic profiling (page unavailable) reports that genes previously called DAM were upregulated in microglia from an ALS-relevant mouse model during both late disease and early recovery. This supports the ALS mouse-model portion of the citation, but the paper does not establish a DAM population in humans: its human ALS analysis assesses reactive microgliosis, not DAM identity. The other diseases in the citing sentence have separate citations and are not assessed here. (LLM, conf=0.87)
Experimental — accuracy not yet measured - cites [30] 30. Krasemann S, Madore C, Cialic R, Baufeld C, Calcagno N, El Fatimy R, Beckers L, O'Loughlin E, Xu Y, Fanek Z, Greco DJ, Smith ST, Tweet G, Humulock Z, Zrzavy T, Conde-Sanroman P, Gacias M, Weng Z, Chen H, Tjon E, Mazaheri F, Hartmann K, Madi A, Ulrich JD, Glatzel M, Worthmann A, Heeren J, Budnik B, Lemere C, Ikezu T, Heppner FL, Litvak V, Holtzman DM, Lassmann H, Weiner HL, Ochando J, Haass C, Butovsky O. 2017. The TREM2-APOE pathway drives the transcriptional phenotype of dysfunctional microglia in neurodegenerative diseases. Immunity 47: 566-581.e9. https://doi.org/10.1016/j.immuni.2017.0 source
The Results section ('Reciprocal induction of APOE and suppression of TGFβ signaling'; page unavailable) identifies an MGnD microglial phenotype in EAE, a mouse model of multiple sclerosis. This supports the multiple-sclerosis-model portion of the cited claim, but the paper does not establish that phenotype in humans with multiple sclerosis; its human specimens were from AD patients. (LLM, conf=0.85)
Experimental — accuracy not yet measured
Classified as probably not a substantial claim.
Premisecitation§ DISCUSSION · p. 15High-level expression of genes in phagocytic and lipid metabolism pathways is the molecular signature of disease-associated microglia (DAM), a recently identified subset of CNS-resident microglia in the 5XFAD mouse model.
“High-level expression of genes in phagocytic and lipid metabolism pathways is the molecular signature of disease-associated microglia (DAM), a recently identified subset of CNS-resident microglia in the 5XFAD mouse model (23).”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [23] 23. Keren-Shaul H, Spinrad A, Weiner A, Matcovitch-Natan O, Dvir-Szternfeld R, Ulland TK, David E, Baruch K, Lara-Astaiso D, Toth B, Itzkovitz S, Colonna M, Schwartz M, Amit I. 2017. A unique microglia type associated with restricting development of Alzheimer's disease. Cell 169: 1276-1290. https://doi.org/10.1016/j.cell.2017.05.018. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 15Aβ turnover and clearance in the mouse brain in vivo is strongly dependent upon ApoE isoform.
“A 𝛃 turnover and clearance in the mouse brain in vivo is strongly dependent upon ApoE isoform (6)”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [6] 6. Castellano JM, Kim J, Stewart FR, Jiang H, DeMattos RB, Patterson BW, Fagan AM, Morris JC, Mawuenyega KG, Cruchaga C, Goate AM, Bales KR, Paul SM, Bateman RJ, Holtzman DM. 2011. Human apoE isoforms differentially regulate brain amyloid𝛃 peptide clearance. Sci Transl Med 3:89ra57. https://doi.org/10.1126/scitranslmed.3002156. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 16IDOL-dependent regulation of synaptic ApoER2 has been implicated in the modulation of dendritic filopodium initiation and synapse maturation during the early postnatal stage.
“IDOL-dependent regulation of synaptic ApoER2 has been implicated in the modulation of dendritic filopodium initiation and synapse maturation during the early postnatal stage (36).”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [36] 36. Gao J, Marosi M, Choi J, Achiro JM, Kim S, Li S, Otis K, Martin KC, Portera-Cailliau C, Tontonoz P. 2017. The E3 ubiquitin ligase IDOL regulates synaptic ApoER2 levels and is important for plasticity and learning. Elife 6:e29178. https://doi.org/10.7554/eLife.29178. source
May combine two claims.
Premisecitation§ DISCUSSION · p. 15LDLR is an ApoE receptor known to regulate brain Aβ clearance.
“LDLR is an ApoE receptor known to regulate brain A 𝛃 clearance.”
Quote in the paperSubstantial claim1 of 3 sources checked- cites [24] 24. Cao D, Fukuchi K, Wan H, Kim H, Li L. 2006. Lack of LDL receptor aggravates learning deficits and amyloid deposits in Alzheimer transgenic mice. Neurobiol Aging 27:1632-1643. https://doi.org/10.1016/j .neurobiolaging.2005.09.011. source
- cites [25] 25. Katsouri L, Georgopoulos S. 2011. Lack of LDL receptor enhances amyloid deposition and decreases glial response in an Alzheimer's disease mouse model. PLoS One 6:e21880. https://doi.org/10.1371/journal.pone .0021880. source
- cites [8] 8. Kim J, Castellano JM, Jiang H, Basak JM, Parsadanian M, Pham V, Mason SM, Paul SM, Holtzman DM. 2009. Overexpression of low-density lipoprotein receptor in the brain markedly inhibits amyloid deposition and increases extracellular A beta clearance. Neuron 64:632-644. https://doi .org/10.1016/j.neuron.2009.11.013. source
Classified as probably not a substantial claim. May combine two claims.
Premisecitation§ DISCUSSION · p. 16IDOL is expressed in neurons, where it posttranslationally regulates the level of neuronal lipoprotein receptors, including ApoER2/LRP8 and VLDLR.
“IDOL is also expressed in neurons, where it posttranslationally regulates the level of neuronal lipoprotein receptors, including ApoER2/LRP8 and VLDLR.”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [36] 36. Gao J, Marosi M, Choi J, Achiro JM, Kim S, Li S, Otis K, Martin KC, Portera-Cailliau C, Tontonoz P. 2017. The E3 ubiquitin ligase IDOL regulates synaptic ApoER2 levels and is important for plasticity and learning. Elife 6:e29178. https://doi.org/10.7554/eLife.29178. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 15DAM actively participates in the dismantling and digestion of amyloid plaques.
“actively participate in the dismantling and digestion of the amyloid plaques (23)”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [23] 23. Keren-Shaul H, Spinrad A, Weiner A, Matcovitch-Natan O, Dvir-Szternfeld R, Ulland TK, David E, Baruch K, Lara-Astaiso D, Toth B, Itzkovitz S, Colonna M, Schwartz M, Amit I. 2017. A unique microglia type associated with restricting development of Alzheimer's disease. Cell 169: 1276-1290. https://doi.org/10.1016/j.cell.2017.05.018. source
The Results state that the findings “suggest that DAM actively participate in the dismantling and digestion of the amyloid plaques.” The citing sentence presents that interpretation as an established fact, omitting the source’s qualification. (LLM, conf=0.86)
Experimental — accuracy not yet measured
Classified as probably not a substantial claim.
Premisecitation§ DISCUSSION · p. 15ApoE facilitates the microglial response to amyloid plaque pathology.
“It has been reported that ApoE facilitates the microglial response to amyloid plaque pathology (31).”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [31] 31. Colonna M, Butovsky O. 2017. Microglia function in the central nervous system during health and neurodegeneration. Annu Rev Immunol 35: 441-468. https://doi.org/10.1146/annurev-immunol-051116-052358. source
Classified as probably not a substantial claim. May combine two claims.
Premisecitation§ RESULTS · p. 10DAM cells are abundant near amyloid plaques and actively participate in phagocytic removal of amyloid plaques.
“It has been shown that DAM cells are abundant near amyloid plaques and actively participate in phagocytic removal of amyloid plaques (23).”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [23] 23. Keren-Shaul H, Spinrad A, Weiner A, Matcovitch-Natan O, Dvir-Szternfeld R, Ulland TK, David E, Baruch K, Lara-Astaiso D, Toth B, Itzkovitz S, Colonna M, Schwartz M, Amit I. 2017. A unique microglia type associated with restricting development of Alzheimer's disease. Cell 169: 1276-1290. https://doi.org/10.1016/j.cell.2017.05.018. source
The Results (page unavailable) locate DAM-marked microglia near Aβ plaques and report intracellular Aβ particles in these cells. The paper says these findings *suggest* that DAM participate in dismantling and digesting plaques; it does not establish active plaque removal as a demonstrated fact. (LLM, conf=0.86)
Experimental — accuracy not yet measured
The quote only partly states this claim.
Findingown data§ RESULTS · p. 3Western blot analysis confirmed IDOL ASO treatment led to reduction of ApoE levels.
“and ApoE levels (Fig. 2E).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: ApoE primarily influences Alzheimer's disease pathology via its effects on Aβ metabolism.
May combine two claims.
Findingown data§ RESULTS · p. 10Each cell cluster contained cells from all six samples without batch effects.
“Each cell cluster contained cells from all six samples without batch effects”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
May combine two claims.
Findingown data§ RESULTS · p. 6Microglia in IDOL ASO-treated group were less hypertrophic and displayed reduced cell body size compared to vehicle-treated group.
“microglia in the IDOL ASO-treated group were less hypertrophic and displayed a reduced cell body size compared to those in the vehicle-treated group (Fig. 4C).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
May combine two claims.
Findingown data§ RESULTS · p. 7Improvement in performance could not be attributed to vision or locomotor differences, since both groups performed similarly in visible platform test and exhibited comparable swimming speed.
“This improvement in performance could not be attributed to vision or locomotor differences, since both groups performed similarly in the visible platform test (Fig. 5C, left) and exhibited comparable swimming speed (Fig. 5C, right).”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
Probably not a substantial claim: may not pass S3 (load-bearing).
Findingown data§ RESULTS · p. 9scRNA-seq obtained data for total 14,682 cells (6,888 PBS, 7,794 ASO) after quality control filtering.
“We obtained data for a total of 14,682 cells (6,888 from the PBS group and 7,794 from the ASO-treated group) after quality control filtering.”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
May combine two claims.
Findingown data§ RESULTS · p. 3mRNA levels of LDLR, VLDLR, and ApoER2 remain unchanged in IDOL ASO-treated mice.
“despite the fact that their mRNA levels remain unchanged (data not shown)”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
May combine two claims.
Findingown data§ RESULTS · p. 3IDOL ASO treatment did not affect body weight or gross behavior.
“We did not observe changes in body weight or gross behavior associated with IDOL ASO treatment in our study.”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
The quote only partly states this claim.
Findingown data§ DISCUSSION · p. 15IDOL inhibition led to an improvement in spatial memory in adult APP/PS1 mice.
“an improvement in spatial memory”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
Findingnone given§ MATERIALS AND METHODS · p. 16The half-life of ASO was estimated around 9 weeks.
“The half-life of ASO was estimated around 9 weeks.”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown data§ MATERIALS AND METHODS · p. 16When administrating IDOL ASO to a cohort of wild-type mice (two groups, n = 5 for each group), IDOL mRNA levels were downregulated 92 and 62%, respectively, 1 week or 2 months after ASO administration.
“When administrating IDOL ASO to a cohort of wild-type mice (two groups, n = 5 for each group), IDOL mRNA levels were downregulated 92 and 62%, respectively, 1 week or 2 months after ASO administration.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
Interpretationown data§ RESULTS · p. 7Failure to detect a difference in fear conditioning may be due to performance in both groups being comparable to wild-type mice.
“The failure to detect a difference in this test may be due to the fact that performance in both groups was comparable to wild-type mice (Fig. 1E).”
Quote in the paperNot a substantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
Classified as probably not a substantial claim.
Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2Among ApoE receptors, LDLR and neuronal LRP1 are the principal regulators of ApoE metabolism, acting to mediate the uptake and degradation of ApoE-containing lipoprotein particles by brain cells.
“Among ApoE receptors, LDLR and neuronal LRP1 are the principal regulators of ApoE metabolism, acting to mediate the uptake and degradation of ApoE-containing lipoprotein particles by brain cells (7).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [7] 7. Holtzman DM, Herz J, Bu G. 2012. Apolipoprotein E and apolipoprotein E receptors: normal biology and roles in Alzheimer disease. Cold Spring Harb Perspect Med 2:a006312. https://doi.org/10.1101/cshperspect.a006312. source
May combine two claims.
Interpretationown data§ RESULTS · p. 6Pharmacological inhibition of brain IDOL activity is sufficient to reduce Aβ levels and plaque burdens in APP/PS1 mice.
“Together, these results suggested that pharmacological inhibition of brain IDOL activity is sufficient to reduce A 𝛃 levels and plaque burdens in APP/PS1 mice.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2ApoE promotes Aβ aggregation.
“ApoE has also been reported to promote A 𝛃 aggregation (5)”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [5] 5. Ma J, Yee A, Brewer HB, Das S, Potter H. 1994. Amyloid-associated proteins alpha 1-antichymotrypsin and apolipoprotein E promote assembly of Alzheimer beta-protein into filaments. Nature 372:92-94. https://doi.org/10.1038/372092a0. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 16CSF-1 stimulates clearance of Aβ.
“stimulates clearance of A 𝛃 (35)”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [35] 35. Mitrasinovic OM, Vincent VA, Simsek D, Murphy GM. 2003. Macrophage colony stimulating factor promotes phagocytosis by murine microglia. Neurosci Lett 344:185-188. https://doi.org/10.1016/S0304-3940(03) 00474-9. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Interpretationreasoning§ DISCUSSION · p. 16These four subgroups may contribute differently to the pathogenesis of AD.
“It is plausible that these four subgroups may contribute differently to the pathogenesis of AD.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 16CSF-1 increases microglial phagocytic activity.
“It has been shown that CSF-1 increases microglial phagocytic activity”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [35] 35. Mitrasinovic OM, Vincent VA, Simsek D, Murphy GM. 2003. Macrophage colony stimulating factor promotes phagocytosis by murine microglia. Neurosci Lett 344:185-188. https://doi.org/10.1016/S0304-3940(03) 00474-9. source
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Premisecitation§ DISCUSSION · p. 16Microglial activation is mediated by a CSF-1/CSF-1R autocrine loop, which results in reactive microgliosis and the release of inflammatory cytokines.
“Several lines of evidence suggest that microglial activation is mediated by a CSF-1/CSF-1R autocrine loop, which results in reactive microgliosis and the release of inflammatory cytokines (33, 34).”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [33] 33. Chitu V, Stanley ER. 2006. Colony-stimulating factor-1 in immunity and inflammation. Curr Opin Immunol 18:39-48. https://doi.org/10.1016/j .coi.2005.11.006. source
- cites [34] 34. Hao AJ, Dheen ST, Ling EA. 2002. Expression of macrophage colonystimulating factor and its receptor in microglia activation is linked to teratogen-induced neuronal damage. Neuroscience 112:889-900. https:// doi.org/10.1016/S0306-4522(02)00144-6. source
Classified as probably not a substantial claim.
Interpretationreasoning§ DISCUSSION · p. 15LDLR may enhance phagocytic activity of microglia through the ApoE pathway.
“We reason that LDLR may enhance phagocytic activity of microglia through the ApoE pathway.”
Quote in the paperSubstantial claim- Rests on an assumption: LDLR is a major metabolic receptor for ApoE.
May combine two claims.
Interpretationown data§ Therapeutic IDOL Reduction Ameliorates Amyloidosis and Improves Cognitive Function in APP/PS1 Mice · p. 2Reducing IDOL expression in the adult brain promotes the phagocytic clearance of Aβ and ameliorates Aβ-dependent pathology.
“Our results suggest that reducing IDOL expression in the adult brain promotes the phagocytic clearance of A 𝛃 and ameliorates A 𝛃 -dependent pathology.”
Quote in the paperSubstantial claim- Rests on an assumption: IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
- Rests on an assumption: APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
- Rests on an assumption: Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
May combine two claims.
Interpretationown data§ DISCUSSION · p. 15The increased expression of lysosomal/phagocytic cell-related genes corresponds to enhanced clearance of soluble Aβ and reduced plaque deposition in the brains of APP/PS1 mice.
“corresponding to the enhanced clearance of soluble A 𝛃 and reduced plaque deposition in the brains of APP/PS1 mice”
Quote in the paperSubstantial claim- Rests on an assumption: Microglia are professional phagocytes capable of clearing pathogenic Aβ in the brain.
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 16CSF-1 mediates microglial-induced neurotoxicity by promoting the release of inflammatory cytokines.
“CSF-1 also mediates microglial-induced neurotoxicity by promoting the release of inflammatory cytokines.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [35] 35. Mitrasinovic OM, Vincent VA, Simsek D, Murphy GM. 2003. Macrophage colony stimulating factor promotes phagocytosis by murine microglia. Neurosci Lett 344:185-188. https://doi.org/10.1016/S0304-3940(03) 00474-9. source
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Study design and conductnone given§ MATERIALS AND METHODS · p. 16All mouse experiments were approved and performed under the guidelines of the Animal Care and Research Advisory Committees at the University of California, Los Angeles (UCLA).
“All mouse experiments were approved and performed under the guidelines of the Animal Care and Research Advisory Committees at the University of California, Los Angeles (UCLA).”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 16ApoER2 functionally couples to NMDA receptors.
“ApoER2 has also been shown to functionally couple to NMDA receptors (37)”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [37] 37. Beffert U, Weeber EJ, Durudas A, Qiu S, Masiulis I, Sweatt JD, Li WP, Adelmann G, Frotscher M, Hammer RE, Herz J. 2005. Modulation of synaptic plasticity and memory by Reelin involves differential splicing of the lipoprotein receptor Apoer2. Neuron 47-579. https://doi.org/10 .1016/j.neuron.2005.07.007. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Premisecitation§ DISCUSSION · p. 16ApoER2 protects against the loss of cortical neurons during normal aging.
“protect against the loss of cortical neurons during normal aging (38)”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [38] 38. Beffert U, Nematollah Farsian F, Masiulis I, Hammer RE, Yoon SO, Giehl KM, Herz J. 2006. ApoE receptor 2 controls neuronal survival in the adult brain. Curr Biol 16:2446 -2452. https://doi.org/10.1016/j.cub .2006.10.029. source
Probably not a substantial claim: may not pass S3 (load-bearing).
Study design and conductnone given§ MATERIALS AND METHODS · p. 17The experimenter was blind to the genotype of the animals.
“The experimenter was blind to the genotype of the animals.”
Quote in the paperNot a substantial claim
The paper relies on this without support.
IDOL ASO treatment effects are due to specific IDOL knockdown and not off-target effects.
“This approach achieves close to maximum IDOL knockdown efficiency with minimal amount of ASO, thereby minimizing nonspecific effects.”
The paper relies on this without support.
APP/PS1 male mice are a valid model of Alzheimer's disease amyloidosis and cognitive deficits.
“a transgenic mouse model of A 𝛃 amyloidosis”
The paper relies on this without support.
Aβ accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.
“since 𝛃 -amyloid (A 𝛃 ) accumulation and aggregation are key initiators of complex pathological changes in the brain that culminate in neurodegeneration years later.”
The paper relies on this without support.
ApoE primarily influences Alzheimer's disease pathology via its effects on Aβ metabolism.
“Mounting evidence suggests that ApoE primarily influences AD pathology via its effects on A 𝛃 metabolism.”
The paper relies on this without support.
ApoE exerts the greatest impact on amyloidosis during the initial seeding stage.
“ApoE exerts the greatest impact on amyloidosis during the initial seeding stage;”
The paper relies on this without support.
ApoE4 has a powerful impact on the development of late-onset AD.
“ApoE4 has a powerful impact on the development of late-onset AD.”
The paper relies on this without support.
LDLR is a major metabolic receptor for ApoE.
“Since LDLR is a major metabolic receptor for ApoE”
The paper relies on this without support.
CSF-1 is a key regulator of inflammatory responses in the brain.
“CSF-1 is considered a key regulator of inflammatory responses in the brain.”
The paper relies on this without support.
Microglia are professional phagocytes capable of clearing pathogenic Aβ in the brain.
“Microglia are professional phagocytes capable of clearing targeted pathogens, cellular debris, and pathogenic A 𝛃 in the brain.”
The paper relies on this without support.
Loss of IDOL in microglia enhances the uptake and clearance of Aβ.
“Previous in vitro studies suggested that loss of IDOL in microglia enhances the uptake and clearance of A 𝛃 .”
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Inhibition of IDOL with an antisense oligonucleotide induces transcriptomic changes mainly in microglia populations.
“Moreover, the inhibition of IDOL with an antisense oligonucleotide induced transcriptomic changes mainly in microglia populations, as detected by single‐cell RNA‐seq. 62”
From Deletion of neuronal <i>Idol</i> ameliorates Alzheimer's disease–related pathologies via APOE receptors (2025) · cites this paper as [62]
The Results (pp. 9–10) describe single-cell RNA-seq of hippocampal cells from IDOL-ASO-treated APP/PS1 mice and report altered microglial gene expression. But the Results (p. 10) say that microglia and oligodendrocytes had the largest numbers of differentially expressed genes, so the claim that changes occurred mainly in microglia omits another prominently affected cell type. (LLM, conf=0.86)
Experimental — accuracy not yet measuredUsing an ASO to reduce IDOL expression in the brains of APP/PS1 male mice, IDOL reduction led to a significant increase of brain LDLR levels, decrease of apoE levels, and alleviation of amyloid pathology and cognitive decline.
“Using an antisense oligonucleotide (ASO) to reduce IDOL expression in the brains of APP/PS1 male mice, it was demonstrated that IDOL reduction led to a significant increase of brain LDLR levels, decrease of apoE levels, and alleviation of amyloid pathology and cognitive decline”
From ApoE4 reduction: An emerging and promising therapeutic strategy for Alzheimer's disease (2022) · cites this paper as Gao et al 2020
The Results (pp. 3, 6) report reduced ApoE and amyloid pathology and improved spatial learning and memory after IDOL-ASO treatment in male APP/PS1 mice. The Results (p. 3) also report increased brain LDLR protein, but the corresponding Western blot is identified as using wild-type mice (Fig. 1D, p. 4), not APP/PS1 mice; the copy does not establish that this increase was significant. (LLM, conf=0.86)
Experimental — accuracy not yet measuredInhibition of Idol with an antisense oligonucleotide reduces amyloid burden in an APP transgenic mouse model.
“In addition, the inhibition of Idol with an antisense oligonucleotide was reported to reduce the amyloid burden in an APP transgenic mouse model. 62”
From Deletion of neuronal <i>Idol</i> ameliorates Alzheimer's disease–related pathologies via APOE receptors (2025) · cites this paper as [62]
Targeting IDOL is an effective way to reduce apoE brain levels.
“targeting IDOL is an effective way to reduce apoE brain levels (Choi et al 2015, Gao et al 2020)”
From ApoE4 reduction: An emerging and promising therapeutic strategy for Alzheimer's disease (2022) · cites this paper as Gao et al 2020
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Plaque-size analysis names different stains
MinorThe results describe the plaque-size analysis as using the X34-stained data set, but the caption for the cited Fig. 2F describes Aβ-antibody-stained plaques.
“To examine the effects of IDOL knockdown on plaque size distribution, we analyzed the X34-stained data set by grouping individual plaques based on size. We found reduced plaque density and average size in the IDOL ASO group compared to controls (Fig. 2F).”
“(F) The densities of A 𝛃 antibody-stained plaques and average plaque sizes were analyzed in the same cohort of mice.”
Cued fear-conditioning tone duration differs
MinorThe results say the tone played for the last 3 minutes of the day-3 test, while the Fig. 5 caption says it played for the last 2 minutes.
“On day 3, mice were placed in a novel environment for 6 min and assessed for freezing during the last 3 min, when the same Mins tone was played to measure the association of tone with foot shock.”
“A tone was played for the last 2 min (right).”
ApoER2 increase is attributed to the wrong figure panel
MinorThe discussion cites Fig. 1C for increased ApoER2 levels, but its caption identifies Fig. 1C as ASO-localization staining. The protein analysis is identified as Fig. 1D.
“IDOL ASO treatment increased brain ApoER2 levels in our study (Fig. 1C).”
“(C) Immunofluorescent staining of brain sections from PBS- or ASO-treated APP/PS1 mice. Primary antibody against the general backbone of ASOs (a gift from Ionis Pharmaceuticals) was used to visualize the distribution of ASOs in brain cells. ASOs (green) are taken up by both neurons and microglia (arrows). (D) Representative Western blot analysis of total protein lysate from brains of WT mice.”
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Flagged first, then by citations
Cited by
Sorted by citations
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“For example, the increasing low-density lipoprotein receptor (LDLR) induced by IDOL deletion or pharmaceutical inhibition seems to promote ApoE mediated Aβ removal and slows functional deterioration [27].”
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“However, our findings are still of great importance considering that IDOL deficiency facilitates LDLR-dependent clearance of ApoE and β-amyloid in the brain, thereby reducing the formation and deposition of amyloid plaques and improving cognitive function in the mouse model of Alzheimer’s disease (46, 47).”
BackgroundArachidonic Acid Mobilization and Peroxidation Promote Microglial Dysfunction in Aβ Pathology
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“Treatment of APP/PS1 male mice with a pS/PD ASO with 5-methylcytosine, 2MOE, and cEt modifications, designed to reduce IDOL expression, reduced amyloid plaque load and neuritic dystrophy and improved the cognitive performance in Morris water maze (Gao et al., 2020).”
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“Gao et al. (2023) therapeutically inhibited IDOL activity in the brains of AD model mice using antisense oligonucleotides (ASO) and found that the inhibition of IDOL activity resulted in a significant reduction of A β deposition in the brains of AD mice, upregulation of lysosomal/ phagocytosis…”
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“It has been shown that reduced Idol facilitates the uptake and clearance of Aβ by an increase in the expression of the lowdensity lipoprotein receptor (LDLR).(25) To explore whether CurTn-elimination of Aβ deposition in the hippocampus of HFD rats involved modulation of the Idol-LDLR pathway, we detected the effects o…”
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Galán-Ganga, M., Guisado-Corcoll, A., Sancho‐Balsells, A., Herrero‐Lorenzo, M., Ballasch, I., Patterer, L., Alberch, J., Arranz, B., Giralt, A., & Martı́, E. (2026) · Cell Death Discovery · doi:10.1038/s41420-026-03166-z
“We also observed increased levels of hsa-miR-548k, which has been associated with cognitive impairment and Alzheimer ’ s disease [43] probably involving microglia-related dysfunctions [44, 45].”
- Authors
- Gao, J., Littman, R., Diamante, G., Xiao, X., Ahn, I. S., Yang, X., Cole, T. A., & Tontonoz, P.
- Affiliations
- The Ohio State University Wexner Medical Center (US)
- University of California, Los Angeles (US)
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California—Los Angeles, Los Angeles
- Ionis Pharmaceuticals (United States) (US)
- Corresponding author
- Gao, Jie
- Tontonoz, Peter
- Venue
- Molecular and Cellular Biology
- Publisher
- Informa UK Limited
- Published
- 2020-03-30
- Volume
- 40
- Issue
- 8
- ISSN
- 0270-7306 (ISSN-L)
- 1098-5549
- PMC
- PMC7108818
- OpenAlex
- W3002043434
- Cited by
- 15
- References
- 47
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 5 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 1
- FWCI
- 0.75
- Type
- journal article
- Language
- en
- Open access
- green
- escholarship.org
- Locations
- Molecular and Cellular Biology (publishedVersion)
- PubMed (publishedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- PubMed Central (submittedVersion)
- Funders
- HHS | National Institutes of Health (R00 AG054736, HL136618)
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
- Keywords
- idols, E3 ubiquitin ligase, Alzheimer's disease, amyloidosis, amyloid-beta clearance, microglia, disease-associated microglia, LDL receptor, antisense oligonucleotides, APP/PS1 mice, spatial learning and memory, lysosomal genes, hippocampus, single-cell transcriptomics
- MeSH terms
- Alzheimer Disease, Amyloidosis, Animals, Apolipoproteins E, Brain, Cognition, Disease Models, Animal, Hippocampus, Male, Mice, Inbred C57BL, Mice, Transgenic, Receptors, LDL, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Microglia, Oligodeoxyribonucleotides, Antisense, Ubiquitin-Protein Ligases, Mice
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-19.
Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-19.
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