Cited by 82Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

The DOI matches its Crossref record; 45 of the 45 references it cites were found in a registry or an index; 2 of the 42 sources its claims cite were checked for support.

BIN1 protein isoforms are differentially expressed in astrocytes, neurons, and microglia: neuronal and astrocyte BIN1 are implicated in tau pathology

Open access

Published version of a preprint

Abstract

Background: Identified as an Alzheimer’s disease (AD) susceptibility gene by genome wide-association studies, BIN1 has 10 isoforms that are expressed in the Central Nervous System (CNS). The distribution of these isoforms in different cell types, as well as their role in AD pathology still remains unclear. Methods: Utilizing antibodies targeting specific BIN1 epitopes in human post-mortem tissue and analyzing mRNA expression data from purified microglia, we identified three isoforms expressed in neurons and astrocytes (isoforms 1, 2 and 3) and four isoforms expressed in microglia (isoforms 6, 9, 10 and 12). The abundance of selected peptides, which correspond to groups of BIN1 protein isoforms, was measured in dorsolateral prefrontal cortex, and their relation to neuropathological features of AD was assessed. Results: Peptides contained in exon 7 of BIN1’s N-BAR domain were found to be significantly associated with AD-related traits and, particularly, tau tangles. Decreased expression of BIN1 isoforms containing exon 7 is associated with greater accumulation of tangles and subsequent cognitive decline, with astrocytic rather than neuronal BIN1 being the more likely culprit. These effects are independent of the BIN1 AD risk variant. Conclusions: Exploring the molecular mechanisms of specific BIN1 isoforms expressed by astrocytes may open new avenues for modulating the accumulation of Tau pathology in AD.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

BIN1 protein isoforms show cell-type-specific expression in human CNS: isoforms 1–3 in neurons and astrocytes, and isoforms 6, 9, 10, and 12 in microglia. Reduced exon 7-containing BIN1 peptides in dorsolateral prefrontal cortex are associated with greater tau tangle burden and cognitive decline, with astrocytic BIN1 implicated as the more likely culprit.

Key findings

  • BIN1 isoforms 1, 2, and 3 (exon 7-containing) were detected in neurons and astrocytes; isoforms 6, 9, 10, and 12 were expressed in purified human microglia, with isoform 10 most highly expressed in microglia RNA-seq.
  • In DLPFC SRM proteomics (n = 1377), only peptides containing exon 7 were associated with AD-related traits, including AD dementia diagnosis, cognitive decline, residual cognition, amyloid, and tau pathology; as pathology burden increased, exon 7 peptide expression decreased.
  • The peptide LQAHLVAQTNLLR explained 1.48% of variance in cognitive decline (p = 4.63×10⁻⁵), while tangles explained 20% (p = 7.59×10⁻⁶⁷); jointly, the peptide effect fell to 0.49% and tangles remained at 19.7%, suggesting BIN1’s cognitive effect is largely not independent of tangles.
  • In post-mortem tissue, BIN1 exon 7+ neurons did not differ between AD and non-AD subjects (9,735 neurons assessed), but BIN1 exon 7+ astrocytes were significantly decreased in AD versus non-AD subjects (14,643 astrocytes evaluated), implicating astrocytes.

Methods

  • Generated and validated exon-specific anti-BIN1 antibodies against exons 7, 11, 13, and 16, then used immunofluorescence co-staining with NeuN, ALDH1L1, and CD45 in human post-mortem brain tissue.
  • Analyzed RNA-seq from human DLPFC (n = 508 ROSMAP subjects) and FACS-purified microglia (n = 21), plus LC-MS/MS shotgun proteomics from purified microglia and SRM proteomics for 7 BIN1 peptides in DLPFC (n = 1377).
  • Used linear regression models adjusted for age, sex, cohort, and technical covariates; mediation and conditional analyses assessed relationships among BIN1 peptides, tau tangles, amyloid, APOEε4, and cognitive decline.

Limitations

  • The paper states that the antibody may not detect epitopes present at very low expression levels, that reverse causation cannot be excluded (increased tangle burden might decrease exon 7 inclusion), and that larger microglia-specific datasets are needed.
  • The paper also states that further studies should validate the astrocyte finding by increasing subject numbers, especially for BIN1 exon 7 staining in neurons in AD brains.
  • Evident from the text: some key validation samples were small (e.g., microglia proteomics used n = 1 AD and n = 1 non-AD; neuron imaging used n = 3 AD and n = 4 non-AD), and the human data are observational, so causal mechanisms are not established.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1186/s13024-020-00387-3

Cites

45 of 45 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

2 of 42 cited sources checked · 0 supported · 0 flagged · accuracy not yet measured

  • Premisecitation

    Downregulation of BIN1 in a Drosophila model reduced Tau accumulation.

    “downregulation of BIN1 in a Drosophila model reduced Tau accumulation [13]”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [13] Chapuis J, Hansmannel F, Gistelinck M, Mounier A, Van Cauwenberghe C, Kolen KV, et al. Increased expression of BIN1 mediates Alzheimer genetic risk by modulating tau pathology. Mol Psychiatry. 2013;18(11):1225–34. source

      The Results section reports that knocking down Amph, the Drosophila BIN1 ortholog, suppressed Tau-induced neurotoxicity. It does not report reduced Tau accumulation; the authors also state that altering Amph expression did not affect human Tau transgene expression levels. The cited result concerns toxicity, not accumulation (page unavailable in our copy). (LLM, conf=0.88)

      Experimental — accuracy not yet measured
  • Findingown data

    BIN1 exons 11, 13, and 16 are expressed in both neurons and astrocytes (by immunostaining).

    “The same approach was used for the antibodies recognizing exons 11, 13 and 16 which are also expressed in both neurons and astrocytes (Fig. 2b, c, d).”
    Quote in the paperSubstantial claim
  • Findingown data

    Isoforms 1 and 9 are the most highly expressed BIN1 isoforms in human DLPFC, followed by isoforms 6, 7 and 10.

    “Isoforms 1 and 9 are the ones most highly expressed, followed by isoforms 6, 7 and 10.”
    Quote in the paperNot a substantial claim
  • Findingown data

    Exon 7 of BIN1 co-localizes with NeuN (neuronal marker) and ALDH1L1 (astrocyte marker) in human post-mortem brain tissue.

    “Immunostaining using the antibody recognizing exon 7 showed co-localization with NeuN, a neuronal marker, and with ALDH1L1, an astrocyte marker (Fig. 2a).”
    Quote in the paperSubstantial claim
  • Findingown data

    Exon 11 of BIN1 is detected in the nucleus of CD45+ cells.

    “The BIN1 antibody recognizing exon 11, contained in isoforms 4, 8 and 12 (Fig. 3c), produced a positive staining in the nucleus of CD45+ cells”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. 36
  • It may state two separate claims as one. 34
  • The quote only partly states this claim. 1
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    BIN1 has 10 isoforms expressed in the central nervous system.

    “BIN1 has 10 isoforms that are expressed in the Central Nervous System (CNS).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [10] Butler MH, David C, Ochoa GC, Freyberg Z, Daniell L, Grabs D, et al. Amphiphysin II (SH3P9; BIN1), a member of the amphiphysin/Rvs family, is concentrated in the cortical cytomatrix of axon initial segments and nodes of ranvier in brain and around T tubules in skeletal muscle. J Cell Biol. 1997;137(6):1355–67. source

      The Results sections on cloning and tissue expression describe alternatively spliced amphiphysin II (BIN1) variants and their expression in brain. They do not establish that 10 isoforms are expressed in the CNS; searches for that number and for brain isoform counts found no supporting passage. Page numbers were not available in our copy. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • cites [11] Zhou Y, Hayashi I, Wong J, Tugusheva K, Renger JJ, Zerbinatti C. Intracellular clusterin interacts with brain isoforms of the bridging integrator 1 and with the microtubule-associated protein tau in Alzheimer's disease. PLoS One. 2014;9(7):e103187. source
  • It may state two separate claims as one.

    Findingown data

    In astrocytes and neurons, BIN1 exons 13 and 16 are detected in the nucleus, and exons 7 and 11 in the cytoplasm.

    “In addition, we observed that antibodies recognizing different exons are detected in different subcellular compartments in astrocytes and neurons (nuclear for exons 13 & 16 and cytoplasmic for exons 7 & 11), confirming the observation reported by other studies that BIN1 is found both in the nucleus and cytosol [29–31].”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Findingown data

    Other AD SNPs in the BIN1 locus have a modest effect on expression of isoform 10 in cortical tissue but not in purified microglia.

    “Other AD SNPs in the BIN1 locus were seen to have a modest effect on expression in cortical tissue data for isoform 10, which is expressed in microglia (Suppl.Table.4a and 4b), but this was not seen in the small dataset derived from purified microglia.”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Findingown data

    After adjusting for tau tangle burden, most associations between BIN1 exon 7 peptides and amyloid are no longer significant, except for the peptide bridging exons 7 and 8, which is diminished by 49.2%.

    “When we adjust for the burden of tau tangles, most of the associations with amyloid are no longer significant, aside for the peptide that bridges exons 7 and 8, which is diminished by 49.2% (Fig. 5a).”
    Quote in the paperSubstantial claim
  • It may state two separate claims as one.

    Findingown data

    There is no association of BIN1 exon 7 peptides with neurovascular measures, cerebral amyloid angiopathy, hippocampal sclerosis, Lewy Bodies, or TDP43 pathology burden.

    “In secondary analyses, we also evaluated other neuropathologic traits that are available in these subjects and find no association with neurovascular measures, cerebral amyloid angiopathy, hippocampal sclerosis, Lewy Bodies, or the burden of TDP43 pathology (Suppl.Table.6).”
    Quote in the paperSubstantial claim
  • The quote only partly states this claim.

    Findingown data

    Only the three BIN1 peptides containing exon 7 sequences display associations with AD-related traits (AD dementia, cognitive decline trajectory, residual cognition, amyloid and tau pathology) in DLPFC proteomic data from 1377 ROSMAP participants.

    “After testing 7 peptides (Suppl. Fig. 5), only the three peptides which contain sequences from exon 7 display associations with AD related-traits: a diagnosis of AD dementia, the participants’ trajectory of cognitive decline, residual cognition and quantitative measures of both amyloid and tau pathology (Fig. 4a-f and Suppl.Table.5).”
    Quote in the paperSubstantial claim
  • It may state two separate claims as one.

    Findingown data

    BIN1 isoform 4 and isoform 8 are absent in human DLPFC.

    “Isoforms 2, 3, 5, and 12 are expressed at low levels, and isoform 4 and isoform 8, which has been reported to be specific to muscle [10], are absent.”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Findingown data

    The association of BIN1 peptide LQAHLVAQTNLLR with tangles is independent of miRNA (miR132, miR129) and co-expressed gene modules.

    “we found that the association of the BIN1 peptide LQAHLVAQTNLLR with tangles is independent of all of these factors”
    Quote in the paperSubstantial claim
  • It may state two separate claims as one.

    Interpretationown data

    Reduced inclusion of BIN1 exon 7 (decreased expression of neuronal/astrocyte isoforms 1, 2, and 3) contributes to increases in tangle burden, which then causes more rapid cognitive decline.

    “we propose that reduced inclusion of exon 7 into BIN1 proteins contributes to increases in tangle burden (Fig. 5b), which then causes more rapid cognitive decline”
    • Also stated in: § Discussion · hedged
      “suggesting that decreased expression of neuronal/astrocyte isoforms 1, 2, and 3 contributes to greater accumulation of tangles and cognitive decline”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    Isoform 1 and 3 are expressed in neurons and isoform 2 in astrocytes.

    “are consistent with previously published reports of isoform 1 and 3 expression in neurons and isoform 2 in astrocytes [11].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [11] Zhou Y, Hayashi I, Wong J, Tugusheva K, Renger JJ, Zerbinatti C. Intracellular clusterin interacts with brain isoforms of the bridging integrator 1 and with the microtubule-associated protein tau in Alzheimer's disease. PLoS One. 2014;9(7):e103187. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    Altered methylation in the BIN1 locus at cg22883290 is related to neuritic amyloid plaques and a pathologic diagnosis of AD, independent of the rs744373 susceptibility variant.

    “A different study found altered methylation in the BIN1 locus at cg22883290 in relation to neuritic amyloid plaques and a pathologic diagnosis of AD, and this altered methylation pattern was independent of the effect of the rs744373 susceptibility variant [14].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [14] De Jager PL, Srivastava G, Lunnon K, Burgess J, Schalkwyk LC, Yu L, et al. Alzheimer's disease: early alterations in brain DNA methylation at ANK1, BIN1, RHBDF2 and other loci. Nat Neurosci. 2014;17(9):1156–63. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Interpretationcitation

    IBA1+ cells in published images may be more representative of perivascular macrophages than microglia based on morphology.

    “These cells may be microglia, but, upon review of the published images, these IBA1+ cells may be more representative of perivascular macrophages than microglia based on morphology [13].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [13] Chapuis J, Hansmannel F, Gistelinck M, Mounier A, Van Cauwenberghe C, Kolen KV, et al. Increased expression of BIN1 mediates Alzheimer genetic risk by modulating tau pathology. Mol Psychiatry. 2013;18(11):1225–34. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.

    Interpretationown data

    BIN1 isoforms 1-9 are present in microglia.

    “suggesting the presence of BIN1 isoforms 1–9 in microglia.”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Interpretationown data

    The association of alternatively spliced exon 7 of BIN1 with AD is primarily driven by tangles, with a possible minor component involving amyloid independent of tangles.

    “suggesting that the association of the alternatively spliced exon 7 of BIN1 with AD is primarily driven by tangles, with a possible minor component involving amyloid independent of tangles (Fig. 5a).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. It may state two separate claims as one.

    Premisenone given

    The distribution of BIN1 isoforms in different cell types and their role in AD pathology remains unclear.

    “The distribution of these isoforms in different cell types, as well as their role in AD pathology still remains unclear.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Study design and conductown data

    Staining of oligodendrocytes could not be appreciated relative to background, so BIN1 protein expression was not further characterized in this cell type.

    “We note that staining of oligodendrocytes could not be appreciated relative to background staining, and we therefore elected not to characterize BIN1 protein expression further in this cell type.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    Decrease of isoform 1 protein expression is correlated with decreased expression of a neuronal marker, illustrating loss of neurons observed in AD.

    “De Rossi and colleagues reported that the decrease of isoform 1 (the largest isoform) protein expression is correlated with a decreased expression of a neuronal marker, illustrating the loss of neurons observed in AD.”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Interpretationown data

    The majority of the role of BIN1 in cognitive decline is not independent of tangles; BIN1 exon 7 peptide LQAHLVAQTNLLR does not have an independent effect on cognitive decline.

    “suggesting that the majority of the role of BIN1 in cognitive decline is not independent of tangles”
    • Also stated in: § BIN1 isoforms 1, 2 and 3 are associated with tau tangles · plain
      “BIN1 exon 7 peptides (i.e LQAHLVAQTNLLR) play a role in the accumulation of tangles and do not have an independent effect on cognitive decline”
    Quote in the paperSubstantial claim
  • It may state two separate claims as one.

    Interpretationown data

    As pathology burden increases, BIN1 exon 7 peptide expression is reduced; as cognitive function worsens, expression of these peptides is diminished.

    “Overall, as pathology burden increases, exon 7 peptide expression is reduced. Similarly, the expression of these peptides is diminished as cognitive functions worsens.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    BIN1 isoforms 9 and 10 are ubiquitously expressed and are also detected in the brain.

    “Isoforms 9 and 10 are ubiquitously expressed and are also detected in the brain [11].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [11] Zhou Y, Hayashi I, Wong J, Tugusheva K, Renger JJ, Zerbinatti C. Intracellular clusterin interacts with brain isoforms of the bridging integrator 1 and with the microtubule-associated protein tau in Alzheimer's disease. PLoS One. 2014;9(7):e103187. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    High expression of BIN1 has been reported in mature oligodendrocytes, especially in the white matter of human brain.

    “In addition, high expression of BIN1 has also been reported in mature oligodendrocytes, especially in the white matter of human brain [12].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [12] De Rossi P, Buggia-Prevot V, Clayton BL, Vasquez JB, van Sanford C, Andrew RJ, et al. Predominant expression of Alzheimer's disease-associated BIN1 in mature oligodendrocytes and localization to white matter tracts. Mol Neurodegener. 2016;11(1):59. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    BIN1 is found both in the nucleus and cytosol.

    “confirming the observation reported by other studies that BIN1 is found both in the nucleus and cytosol [29–31]”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites [29] Muller AJ, Baker JF, DuHadaway JB, Ge K, Farmer G, Donover PS, et al. Targeted disruption of the murine Bin1/Amphiphysin II gene does not disable endocytosis but results in embryonic cardiomyopathy with aberrant myofibril formation. Mol Cell Biol. 2003;23(12):4295–306. source
    • cites [30] Kadlec L, Pendergast AM. The amphiphysin-like protein 1 (ALP1) interacts functionally with the cABL tyrosine kinase and may play a role in cytoskeletal regulation. Proc Natl Acad Sci U S A. 1997;94(23):12390–5. source
    • cites [31] Elliott K, Ge K, Du W, Prendergast GC. The c-Myc-interacting adaptor protein Bin1 activates a caspase-independent cell death program. Oncogene. 2000;19(41):4669–84. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    The effect size of the BIN1 variant tagged by rs6733839 is among the largest for common AD variants; only APOEε4 and TREM2 have larger effects.

    “The effect size of the BIN1 variant (tagged by rs6733839) is among the largest for common AD variants [3]; only APOEε4 and TREM2 [2] have larger effects.”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [3] Lambert JC, Ibrahim-Verbaas CA, Harold D, Naj AC, Sims R, Bellenguez C, et al. Meta-analysis of 74,046 individuals identifies 11 new susceptibility loci for Alzheimer's disease. Nat Genet. 2013;45(12):1452–8. source
    • cites [2] Seshadri S, Fitzpatrick AL, Ikram MA, DeStefano AL, Gudnason V, Boada M, et al. Genome-wide analysis of genetic loci associated with Alzheimer disease. JAMA. 2010;303(18):1832–40. source
  • It may state two separate claims as one.

    Study design and conductown data

    The 4 custom antibodies against different epitopes of BIN1 recognized the selected isoform expressed in HEK 293 T cells by immunohistochemistry, with specific reactivity and no non-specific reactivity.

    “Furthermore, the 4 custom antibodies against different epitopes of BIN1 recognized the selected isoform expressed in HEK 293 T cells by immunohistochemistry (Suppl. Fig. 2). Specific reactivity was demonstrated against the appropriate transfected cell pellet controls, while no non-specific reactivity was observed (Suppl. Fig. 2).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    BIN1 isoform 8 is specifically expressed in muscle.

    “Isoform 8 is specifically expressed in muscle [10].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [10] Butler MH, David C, Ochoa GC, Freyberg Z, Daniell L, Grabs D, et al. Amphiphysin II (SH3P9; BIN1), a member of the amphiphysin/Rvs family, is concentrated in the cortical cytomatrix of axon initial segments and nodes of ranvier in brain and around T tubules in skeletal muscle. J Cell Biol. 1997;137(6):1355–67. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Study design and conductown data

    Four out of 25 microglia samples were excluded due to a low percentage of exonic and UTR reads (<30%) or a low total number of reads mapping to the transcriptome (<10^6 reads).

    “Four out of 25 samples were excluded due to a low percentage of exonic and UTR reads (< 30%) or a low total number of reads mapping to the transcriptome (< 106 reads).”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    Several susceptibility loci that contribute to genetic risk for AD, including one containing BIN1, have been identified by GWAS.

    “In the last few years, several susceptibility loci that contribute to genetic risk for AD, including one that contains the BIN1 (Bridging integrator 1) gene, have been identified by genome wide association studies (GWAS) [2].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [2] Seshadri S, Fitzpatrick AL, Ikram MA, DeStefano AL, Gudnason V, Boada M, et al. Genome-wide analysis of genetic loci associated with Alzheimer disease. JAMA. 2010;303(18):1832–40. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Study design and conductown data

    No basal expression of BIN1 was detected in the HEK 293 T cell clone used to express the different isoforms.

    “No basal expression of BIN1 was detected in the HEK 293 T cell clone that we used to express the different isoforms.”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Interpretationown data

    BIN1 isoforms present in myeloid cells are expressed in a context-dependent manner and are probably more prominent in microglia than in peripheral myeloid cells.

    “These findings showed that isoforms present in myeloid cells are expressed in a context-dependent manner and are probably more prominent in microglia than in peripheral myeloid cells.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Study design and conductown data

    All participants undergo a uniform structured evaluation for AD including CERAD, Braak Stage, NIA-Reagan, and a global measure of AD pathologic burden.

    “All participants undergo a uniform structured evaluation for AD including CERAD, Braak Stage, NIA-Reagan, and a global measure of AD pathologic burden with modified Bielschowsky; amyloid load and PHF Tau tangles by immunocytochemistry and image analysis and stereology; Lewy bodies and TDP-43 by immunocytochemistry; and the age, location, and size of all macro- and microscopic infarcts.”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Premisecitation

    BIN1 isoforms are translated into proteins differently in neurons and astrocytes: cultured neurons mostly express isoforms 1, 3, 5 and 7 while cultured astrocytes express isoforms 2, 5, 9 and 10.

    “It was reported that BIN1 isoforms are translated into proteins differently in neurons and astrocytes: cultured neurons mostly express isoforms 1, 3, 5 and 7 while cultured astrocytes express isoforms 2, 5, 9 and 10 [11].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [11] Zhou Y, Hayashi I, Wong J, Tugusheva K, Renger JJ, Zerbinatti C. Intracellular clusterin interacts with brain isoforms of the bridging integrator 1 and with the microtubule-associated protein tau in Alzheimer's disease. PLoS One. 2014;9(7):e103187. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Study design and conductnone given

    The follow-up rate exceeds 95% and the autopsy rate exceeds 90% in ROS/MAP.

    “The follow-up rate exceeds 95% and the autopsy rate exceeds 90%.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    BIN1 expression has been reported in IBA1+ cells in AD brain.

    “BIN1 expression has been reported in IBA1+ cells in AD brain [13].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [13] Chapuis J, Hansmannel F, Gistelinck M, Mounier A, Van Cauwenberghe C, Kolen KV, et al. Increased expression of BIN1 mediates Alzheimer genetic risk by modulating tau pathology. Mol Psychiatry. 2013;18(11):1225–34. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Study design and conductnone given

    All SRM data were manually inspected to ensure correct peak assignment and peak boundaries.

    “All the data were manually inspected to ensure correct peak assignment and peak boundaries.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim.

    Premisenone given

    The extent of characterization of BIN1 isoform expression in different cell types has been limited by the small number of commercially available antibodies against exon-selective epitopes of BIN1.

    “Finally, the extent of the characterization of the expression of these different BIN1 isoforms in different cell types has been limited by the small number of commercially available antibodies against exon-selective epitopes of BIN1.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Study design and conductown data

    Peptides were identified using MaxQuant with a false discovery rate threshold of 1%.

    “The peptides were identified using the MaxQuant software with a false discovery Rate (FDR) threshold of 1%.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    BIN1 isoforms 1 through 7 are brain specific, with isoform 1 being exclusively expressed in neurons.

    “Isoforms 1 through 7 are brain specific with isoform 1 being exclusively expressed in neurons [10].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [10] Butler MH, David C, Ochoa GC, Freyberg Z, Daniell L, Grabs D, et al. Amphiphysin II (SH3P9; BIN1), a member of the amphiphysin/Rvs family, is concentrated in the cortical cytomatrix of axon initial segments and nodes of ranvier in brain and around T tubules in skeletal muscle. J Cell Biol. 1997;137(6):1355–67. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Study design and conductnone given

    ROS and MAP cohorts implement the same annual evaluations including 19 cognitive functional tests and use accepted and validated procedures to diagnose AD and other dementias and MCI.

    “Both cohorts implement the same annual evaluations including 19 cognitive functional tests and use accepted and validated procedures to diagnose AD and other dementias and mild cognitive impairment (MCI).”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    An association between expression of some BIN1 RNA isoforms and AD was reported: a decrease of isoform 1 and an increase of isoform 9 expression in small collections of human AD post-mortem brain samples.

    “In addition, an association between expression of some BIN1 RNA isoforms and AD was reported: a decrease of isoform 1 and an increase of isoform 9 expression was noted in small collections of human AD post-mortem brain samples [19, 20].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [19] Glennon EB, Whitehouse IJ, Miners JS, Kehoe PG, Love S, Kellett KA, et al. BIN1 is decreased in sporadic but not familial Alzheimer's disease or in aging. PLoS One. 2013;8(10):e78806. source
    • cites [20] Holler CJ, Davis PR, Beckett TL, Platt TL, Webb RL, Head E, et al. Bridging integrator 1 (BIN1) protein expression increases in the Alzheimer's disease brain and correlates with neurofibrillary tangle pathology. J Alzheimers Dis. 2014;42(4):1221–7. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisenone given

    BIN1 is expressed in 14 RNA transcripts, 11 of which are translated into proteins: isoforms 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 12.

    “BIN1 is expressed in 14 RNA transcripts, generated by alternative splicing, and 11 of them are translated into respective proteins: isoforms 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 12 (Fig. 1b).”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Interpretationown data

    BIN1 exon 7 is specifically associated with AD-related pathologies, and amyloid and tau tangles measures are more strongly associated than measures of clinical function.

    “These findings suggest a specific association between exon 7 of BIN1 and AD-related pathologies, and our measures of amyloid and tau tangles appear to be more strongly associated than the measures related to clinical function.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    BIN1 has been implicated in inflammation: there is a report of an increase of inflammation in BIN1 knock-out mice.

    “BIN1 has been implicated in inflammation: there is a report of an increase of inflammation in BIN1 knock-out mice [18].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [18] Chang MY, Boulden J, Katz JB, Wang L, Meyer TJ, Soler AP, et al. Bin1 ablation increases susceptibility to cancer during aging, particularly lung cancer. Cancer Res. 2007;67(16):7605–12. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    A decrease of DNM2 mRNA in AD temporal cortex has been reported.

    “a decrease of DNM2 mRNA in AD temporal cortex has been reported [39]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [39] Kamagata E, Kudo T, Kimura R, Tanimukai H, Morihara T, Sadik MG, et al. Decrease of dynamin 2 levels in late-onset Alzheimer's disease alters Abeta metabolism. Biochem Biophys Res Commun. 2009;379(3):691–5. source
  • Probably not a substantial claim. It may state two separate claims as one.

    Premisecitation

    Currently, only 2 of the 11 translated isoforms have been described as differentially expressed in AD brain: a decrease of isoform 1 and an increase of isoform 9 expression correlate with AD.

    “Currently, only 2 of the 11 translated isoforms have been described as being differentially expressed in the AD brain: a decrease of isoform 1 and an increase of isoform 9 expression correlate with AD [19]”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [19] Glennon EB, Whitehouse IJ, Miners JS, Kehoe PG, Love S, Kellett KA, et al. BIN1 is decreased in sporadic but not familial Alzheimer's disease or in aging. PLoS One. 2013;8(10):e78806. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    Tau tangles are associated with certain miRNA (miR132 and miR129) and certain modules of co-expressed genes derived from cortical RNA sequence data.

    “we have found tau tangles to be associated with certain miRNA previously reported to be associated with AD (miR132 and mir129) [33], as well as certain modules of co-expressed genes derived from cortical RNA sequence data [6]”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [33] Patrick E, Rajagopal S, Wong HA, McCabe C, Xu J, Tang A, et al. Dissecting the role of non-coding RNAs in the accumulation of amyloid and tau neuropathologies in Alzheimer's disease. Mol Neurodegener. 2017;12(1):51. source
    • cites [6] Mostafavi S, Gaiteri C, Sullivan SE, White CC, Tasaki S, Xu J, et al. A molecular network of the aging human brain provides insights into the pathology and cognitive decline of Alzheimer's disease. Nat Neurosci. 2018;21(6):811–9. source
  • It may state two separate claims as one.

    Interpretationown data

    Decreased expression of BIN1 isoforms 1, 2 and 3 leads to an increase in the endocytosis process and promotes the phosphorylation of AD-related Tau epitopes in neurons, in a cell-autonomous or non-cell-autonomous fashion.

    “In summary, based on our data and evidence from the literature, we propose that decreased expression of isoforms 1, 2, and 3 leads to an increase in the endocytosis process and promotes the phosphorylation of AD-related Tau epitopes in neurons, either in a cell autonomous or non-cell autonomous fashion.”
    Quote in the paperSubstantial claim
  • It may state two separate claims as one.

    Premisecitation

    Exon 7 encodes a portion of the N-BAR domain of BIN1 and is specific to isoforms 1, 2 and 3.

    “Exon 7 encodes a portion of the N-BAR domain of BIN1 and is specific to isoforms 1, 2 and 3 [7, 37]”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [7] Peter BJ, Kent HM, Mills IG, Vallis Y, Butler PJ, Evans PR, et al. BAR domains as sensors of membrane curvature: the amphiphysin BAR structure. Science. 2004;303(5657):495–9. source
    • cites [37] Frost A, Unger VM, De Camilli P. The BAR domain superfamily: membrane-molding macromolecules. Cell. 2009;137(2):191–6. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    Exon 7 enables the interaction between BIN1 and dynamin 2 (DNM2), and this interaction facilitates endocytic uptake.

    “Exon 7 enables the interaction between BIN1 and dynamin 2 (DNM2), a ubiquitously expressed GTP binding protein, and this interaction facilitates endocytic uptake [38]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [38] Ellis JD, Barrios-Rodiles M, Colak R, Irimia M, Kim T, Calarco JA, et al. Tissue-specific alternative splicing remodels protein-protein interaction networks. Mol Cell. 2012;46(6):884–92. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    Oligodendrocytes, which are enriched in white matter, mainly express BIN1 isoform 9.

    “These investigators reported that oligodendrocytes, which are enriched in white matter, mainly express BIN1 isoform 9 [42]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [42] De Rossi P, Buggia-Prevot V, Andrew RJ, Krause SV, Woo E, Nelson PT, et al. BIN1 localization is distinct from tau tangles in Alzheimer's disease. Matters (Zur). 2017;2017. source
  • Probably not a substantial claim. The paper may give no reason why it holds. It may state two separate claims as one.

    Premisenone given

    The CLAP domain is involved in clathrin-mediated endocytosis and in the recruitment of dynamin.

    “The CLAP domain has been described to be involved in clathrin-mediated endocytosis and in the recruitment of dynamin.”
    Quote in the paperNot a substantial claim
  • It may state two separate claims as one.

    Premisecitation

    Absence of exon 7 leads to inhibition of uptake, suggesting the BIN1 N-BAR domain plays a key role in endocytosis via its interaction with DNM2.

    “Absence of exon 7 leads to the inhibition of uptake, suggesting that the BIN1 N-BAR domain plays a key role in endocytosis via its interaction with DNM2 [38]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [38] Ellis JD, Barrios-Rodiles M, Colak R, Irimia M, Kim T, Calarco JA, et al. Tissue-specific alternative splicing remodels protein-protein interaction networks. Mol Cell. 2012;46(6):884–92. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    The BIN1 N-BAR domain has been implicated in stabilizing the polymerization of actin, including Tau-induced actin polymerization.

    “the BIN1 N-BAR domain has also been implicated in stabilizing the polymerization of actin, including the one induced by Tau [40]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [40] Drager NM, Nachman E, Winterhoff M, Bruhmann S, Shah P, Katsinelos T, et al. Bin1 directly remodels actin dynamics through its BAR domain. EMBO Rep. 2017;18(11):2051–66. source
  • It may state two separate claims as one.

    Interpretationown data

    The BIN1 isoforms expressed by neurons and astrocytes, although possibly unrelated to the effect of the rs6733839 AD risk variant, represent a distinct contribution of BIN1 to AD.

    “While these isoforms may be unrelated to the effect of the rs6733839 AD risk variant, they nonetheless represent a distinct contribution of this complex protein to AD, offering new insights into how BIN1 could be targeted or could serve as an outcome measure in AD studies.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim. The paper’s conclusions may not depend on it.

    Premisecitation

    BIN1 has been implicated in phagocytosis in macrophages.

    “BIN1 has been implicated in phagocytosis in macrophages [43]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [43] Gold ES, Simmons RM, Petersen TW, Campbell LA, Kuo CC, Aderem A. Amphiphysin IIm is required for survival of chlamydia pneumoniae in macrophages. J Exp Med. 2004;200(5):581–6. source
  • Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.

    Premisecitation

    BIN1 has been reported to regulate endocytosis in neurons, and loss of its function appears to promote the propagation of Tau pathology in an in vitro model.

    “BIN1 has been reported to regulate endocytosis in neurons, and the loss of its function appears to promote the propagation of Tau pathology in an in vitro model, supporting our findings [41]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [41] Calafate S, Flavin W, Verstreken P, Moechars D. Loss of Bin1 promotes the propagation of tau pathology. Cell Rep. 2016;17(4):931–40. source
55 of 55
  • The paper relies on this without support.

    The abundance of selected BIN1 peptides measured by SRM reflects the abundance of the corresponding BIN1 protein isoforms in DLPFC.

    “The abundance of selected peptides, which correspond to groups of BIN1 protein isoforms, was measured in dorsolateral prefrontal cortex, and their relation to neuropathological features of AD was assessed.”
  • The paper relies on this without support.

    Cell type proportions estimated using DSA with RNA-seq accurately reflect the proportions of myeloid cells, neurons, astrocytes, oligodendrocytes, and endothelial cells in DLPFC.

    “adjusting for age at death, sex, and cohort (ROS or MAP), as well as myeloid proportion, neuron proportion, astrocyte proportion, oligodendrocyte proportion, and endothelial cell proportion as estimated using DSA with RNA-seq.”
  • The paper relies on this without support.

    The antibody used specifically recognizes BIN1 exon 7 and does not cross-react with other BIN1 epitopes.

    “Utilizing an antibody specifically targeting exon 7 on post-mortem human brain”
    “we stained AD and cognitively non-impaired subjects from the New York Brain Bank (see Suppl. Table.1.b for a description of these subjects) with the antibody recognizing BIN1 exon 7 and ALDH1L1, a marker of cortical astrocytes, or NeuN, a neuronal marker”
  • The paper relies on this without support.

    BIN1 expression measured in MDMi (monocyte-derived microglia-like) cells reflects BIN1 expression by microglia in the brain.

    “we show that BIN1 isoforms 10 and 12 are expressed in MDMi and not in peripheral monocytes, highlighting the existence of context-specific expression of BIN1 protein isoforms by microglia.”
4 of 4

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.

  • Astrocyte comparison is described as using the same seven subjects

    Major

    The Results describe the astrocyte comparison as being in the same seven individuals assessed for neurons, whereas the Fig. 6 caption specifies nine AD and nine non-AD subjects for the astrocyte comparison.

  • Table 2 assigns exon 11 to isoforms 5 and 6

    Major

    Table 2 lists exon 11 for isoforms 5 and 6, but the text states that exon 11 is present only in isoforms 4, 8 and 12.

  • Discussion says isoform 4 was detected in DLPFC

    Minor

    The Discussion includes isoform 4 among those detected at the RNA level in DLPFC, whereas the Results explicitly say it is absent.

  • CNS isoform count conflicts with the isoforms listed

    Minor

    The abstract says 10 BIN1 isoforms are expressed in the CNS, but the Results list nine expressed isoforms and say that isoforms 4 and 8 are absent.

  • Table 2 marks neuronal and astrocytic isoform 12 data unavailable

    Minor

    The Results state that exon 11 staining establishes expression of isoform 12 in neurons and astrocytes, but Table 2 marks the antibody data for both cell types as unavailable.

5 of 5

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Metadata

Authors
Taga, M., Petyuk, V. A., White, C., Marsh, G., Ma, Y., Klein, H.-U., Connor, S. M., Kroshilina, A., Yung, C. J., Khairallah, A., Olah, M., Schneider, J., Karhohs, K., Carpenter, A. E., Ransohoff, R., Bennett, D. A., Crotti, A., Bradshaw, E. M., & De Jager, P. L.
Affiliations
  • Broad Institute (US)
  • Pacific Northwest National Laboratory (US)
  • Biogen (United States) (US)
  • Columbia University Irving Medical Center (US)
  • Rush University Medical Center (US)
  • Harvard University (US)
Venue
Molecular Neurodegeneration
Published
2020-07-29
Volume
15
Issue
1
Pages
44-44
ISSN
1750-1326 (ISSN-L)
OpenAlex
W3045809806
Cited by
81
References
45
Citations by year
2026: 12 · 2025: 14 · 2024: 7 · 2023: 9 · 2022: 28 · 2021: 7 · 2020: 2
FWCI
4.57
Type
journal article
Language
en
Open access
Locations
  • Molecular Neurodegeneration (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institutes of Health (U01 AG046152, R01 AG048015, R01 NS089674)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
BIN1, Alzheimer's disease, tau pathology, tau tangles, astrocytes, neurons, microglia, N-BAR domain, exon 7, dorsolateral prefrontal cortex, cognitive decline, postmortem brain, cell type-specific gene expression
MeSH terms
Alzheimer Disease, Astrocytes, Brain, Humans, Neurons, Nuclear Proteins, tau Proteins, Microglia, Protein Isoforms, Tumor Suppressor Proteins, Adaptor Proteins, Signal Transducing

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