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Cited by 4Neuroinflammation and Neurodegeneration MechanismsNeuroscience and Neuropharmacology ResearchNeurological Disease Mechanisms and Treatments

Varicose projection astrocytes: Conserved reactive cells in brain pathology

Open access
Ciani, Caterina, Pistorio, Giulio, Giancola, Simona, Mearelli, Marika, Mongelli, Francesca Emma, Forouzeh, Delaram, Campos Soares, Luana, Gonzalez Martin, Marta +25 more·2026·Science Advances
DOI 10.1126/sciadv.ady8204PMC PMC13378549
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Abstract

Astrocytes play essential roles in neuropathology. Human astrocytes exhibit unique properties, highlighting the importance of studying astrocytic responses in human models. Varicose projection astrocytes, previously considered exclusive to hominoids and a physiological type of astrocytes, were suggested to reflect pathological burden, albeit direct evidence linking them to neurological diseases has been lacking. Here, we demonstrate that varicose projection astrocytes also appear in other mammals and show, from four distinct human-based disease models, that varicose projection astrocytes are induced by neuroinflammation and characterized by distinctive subcellular features, indicating involvement in cellular stress responses, and their density is increased in aging and human neuropathology. Our findings establish varicose projection astrocytes as a reactive phenotype associated with neuropathology.

AI snapshot

Written from the paper’s full text.

TL;DR

Varicose projection astrocytes (VPAs), previously considered hominoid-specific physiological astrocytes, are shown here to appear across mammals and to be induced by neuroinflammation in multiple human and mouse models. Their density increases in aging and human neuropathology, supporting VPAs as a conserved reactive astrocyte phenotype rather than a stable subtype.

Key findings

  • VPAs are not hominoid-specific: they were found in mouse ESC-derived astrocytes and in tiger postmortem prefrontal cortex, where they were present in three of five tiger samples.
  • Pro-inflammatory cytokines induce VPAs in human models: in hiPSC-derived astrocytes, combined IL-1β + TNF-α produced up to a 45-fold increase versus controls [% VPAs/total astrocytes: Ctr = 0.07 ± 0.07%, IL-1β = 1.51 ± 0.60%, TNF-α = 1.07 ± 0.12%, IL-1β + TNF-α = 3.20 ± 0.32%]. In hNSC-derived astrocytes, combined treatment increased GFAP+/GLAST+/CD49f+ VPAs from 2.06 ± 0.68% to 8.73 ± 1.17% and GFAP+/SOX9+/Aldh1l1+ VPAs from 4.49 ± 1.25% to 12.74 ± 1.21%. In immunocompetent cortical organoids, LPS increased VPAs from 13.39 ± 3.65% to 60.66 ± 4.21% (P < 0.0001). Cytokine withdrawal reduced VPAs from 2.34 ± 0.49% at 7 days to 0.29 ± 0.02% at 14 days (P < 0.007).
  • Mouse models show induction in vitro and in vivo: mESC-derived astrocytes increased VPAs after IL-1β, TNF-α, or combined treatment (Ctr = 0.60 ± 0.11%; IL-1β = 2.18 ± 0.59%; TNF-α = 1.08 ± 0.10%; IL-1β + TNF-α = 1.10 ± 0.14%). After controlled cortical impact, VPA density increased in ipsilateral cortex (e.g., Area 1: sham-ipsi = 12.15 ± 1.3%, TBI-ipsi = 31.24 ± 3.07%; Area 3: sham-ipsi = 8.72 ± 2.33%, TBI-ipsi = 36.96 ± 3.7%). In LPS-treated Aldh1l1CreERt2::floxTdTomato mice, VPAs were 13.05 ± 2.44% versus 0% in vehicle (P < 0.0001).
  • Human pathology and aging show increased VPA density: AD showed a 2.6-fold increase (Ctr = 10.85 ± 0.13%, AD = 27.79 ± 5.63%, P < 0.01), PD a 2.3-fold increase (PD = 24.62 ± 4.22%, P < 0.01), and MS a 3.7-fold increase (MS = 40.69 ± 6.18%, P < 0.004). In PD subcortical regions, BG-CPP increased ~2-fold (Ctr = 16.48 ± 1.11%, PD = 32.62 ± 0.92%, P < 0.0002) and BG-STN ~3-fold (Ctr = 12.35 ± 1%, PD = 38.96 ± 0.5%, P < 1.06 × 10−5). Epilepsy due to hippocampal sclerosis increased ~2-fold (Ctr = 0.69 ± 0.14%, epilepsy = 1.33 ± 0.09%, P < 0.01), tumor-associated epilepsy was 1.59 ± 0.36% (P < 0.04), and aged controls had 10.85 ± 0.16% versus younger controls 0.69 ± 0.14% (P < 10 × 10−7). Varicosities contained EV markers (integrin β1, CD9, CD63) and organelle markers (TOMM20, calnexin, MPR).

Methods

  • Experimental design used multiple models: hiPSC- and hNSC-derived human astrocytes, mixed astrocyte-neuron cultures, immunocompetent cortical organoids, mESC-derived mouse astrocytes, mouse controlled cortical impact and LPS-induced neuroinflammation, human postmortem and surgical brain samples, and tiger postmortem prefrontal cortex.
  • Treatments included IL-1β and TNF-α (100 ng/ml each in pure cultures; 10 ng/ml each in mixed cultures), LPS (10 ng/ml in organoids; 1 mg/kg in mice), and cytokine withdrawal; readouts were immunofluorescence for GFAP, S100β, astrocyte markers, EV markers, and organelle markers, with confocal imaging and quantification of VPA density.
  • Statistics used Shapiro-Wilk normality testing, one-way ANOVA with Tukey’s multiple comparisons or two-tailed Student’s t tests, significance at P < 0.05, and data presented as means ± SEM from at least three independent biological replicates per experiment type unless otherwise specified.

Limitations

  • The paper states that in vitro systems can produce nonphysiological morphologies; it addressed this by validating additional astrocyte markers and using two in vivo mouse models. It also states that the operational definition prioritized discrete, regularly spaced varicosities rather than absolute process length, and that a neuroprotective role cannot be excluded.
  • The paper notes that increased VPA density could theoretically reflect enhanced GFAP visibility in reactive astrocytes, but argues against this using tdTomato-labeled astrocytes; it calls for future dye-filling and high-resolution imaging such as EM reconstruction to validate morphology.
  • Evident from the text: many human disease comparisons used n = 3 per group, control specimens were often from aged individuals, tiger observations were limited to three of five samples, and the study does not establish causal molecular mechanisms linking neuroinflammation to VPA formation.

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

Integrity signals

Registry

Crossref · 10.1126/sciadv.ady8204

Cites

56 of 56 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

29 of 40 cited sources checked · 13 supported · 0 flagged · accuracy not yet measured

  • Premisecitation

    Previous studies have shown that varicose projection astrocytes were not detected in neonatal or infant human brains.

    “Previous studies have shown that varicose projection astrocytes were not detected in neonatal or infant human brains (21, 22)”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [21] C. Falcone, E. L. McBride, W. D. Hopkins, P. R. Hof, P. R. Manger, C. C. Sherwood, S. C. Noctor, V. Martínez-Cerdeño, Redefining varicose projection astrocytes in primates. Glia 70, 145– 154 (2022). 34533866 source
    • cites [22] C. Ciani, C. Falcone, Interlaminar and varicose-projection astrocytes: Toward a new understanding of the primate brain. Front. Cell. Neurosci. 18, 1477753 (2024). 39655243 PMC11626530 source

      The Varicose-projection astrocytes section says VP-As were not found in fetal brains or in patients aged 5 or 10. It does not report findings for neonatal or infant human brains specifically, so the age groups in the claim are not supported by this passage. No page number is available in our copy. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
  • Findingcitation

    Varicose projection astrocytes are not restricted to hominoids but also appear in other mammals, like mice and tigers.

    “our finding that varicose projection astrocytes are not only restricted to hominoids (17, 21) but also appear in other mammals, like mice and tigers”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [17] N. A. Oberheim, T. Takano, X. Han, W. He, J. H. C. Lin, F. Wang, Q. Xu, J. D. Wyatt, W. Pilcher, J. G. Ojemann, B. R. Ransom, S. A. Goldman, M. Nedergaard, Uniquely hominid features of adult human astrocytes. J. Neurosci. 29, 3276– 3287 (2009). 19279265 PMC2819812 source
    • cites [21] C. Falcone, E. L. McBride, W. D. Hopkins, P. R. Hof, P. R. Manger, C. C. Sherwood, S. C. Noctor, V. Martínez-Cerdeño, Redefining varicose projection astrocytes in primates. Glia 70, 145– 154 (2022). 34533866 source
  • Findingown data

    Integrin β1 localizes within varicosities of hiPSC-derived astrocytes treated with IL-1β and TNF-α.

    “Integrin β1, a multifunctional cell surface receptor involved in extracellular matrix interactions and EV uptake (26), was localized within the varicosities (Fig. 4, A and B).”
    Quote in the paperSubstantial claim
  • Findingown data

    In postmortem human prefrontal cortex, varicose projection astrocyte density (as percentage of GFAP+ astrocytes) is increased 2.3-fold in Parkinson's disease compared to controls (Ctr = 10.85 ± 0.13%, PD = 24.62 ± 4.22%, P < 0.01).

    “PD showed a 2.3-fold increase (PD analysis: Ctr = 10.85 ± 0.13%, PD = 24.62 ± 4.22%, P < 0.01; Fig. 6, B and F)”
    Quote in the paperSubstantial claim
  • Findingown data

    CD9 and CD63 colocalize with varicosities in hiPSC-derived astrocytes treated with IL-1β and TNF-α.

    “Similarly, tetraspanin family proteins cluster of differentiation 9 (CD9) and cluster of differentiation 63 (CD63), key components of EV membranes and involved in their biogenesis (27, 28), colocalized with varicosities (Fig. 4, C and D and E and F, respectively).”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. 15
  • May combine two claims. 29
  • The quote only partly states this claim. 2

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Varicose projection astrocytes were considered a physiological subtype of human/hominoid astrocytes with unclear functional significance.

    “On the basis of early description in postmortem tissue and surgical resections, varicose projection astrocytes were considered a physiological subtype of human/hominoid astrocytes with unclear functional significance (21, 22).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [21] C. Falcone, E. L. McBride, W. D. Hopkins, P. R. Hof, P. R. Manger, C. C. Sherwood, S. C. Noctor, V. Martínez-Cerdeño, Redefining varicose projection astrocytes in primates. Glia 70, 145– 154 (2022). 34533866 source
    • cites [22] C. Ciani, C. Falcone, Interlaminar and varicose-projection astrocytes: Toward a new understanding of the primate brain. Front. Cell. Neurosci. 18, 1477753 (2024). 39655243 PMC11626530 source

      The Introduction and “Varicose-projection astrocytes” section describe VP-As in humans and apes and say their function remains unknown. The section calls them a distinct class, but does not establish that they are a physiological subtype; instead, it discusses the possibility that they arise in response to specific brain conditions or insults. The supplied passages do not substantiate the claim about early descriptions in surgical resections. (LLM, conf=0.84)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Study design and conductown data

    The study accounted for established pathways of astrocyte-microglia cross-talk by using direct cytokine stimulation in 2D cultures lacking microglia and LPS-induced microglial activation in organoids.

    “Our approach accounted for established pathways of astrocyte-microglia cross-talk (8, 9, 15, 40), using direct cytokine stimulation (TNF-α and IL-1β) in 2D cultures lacking microglia and LPS-induced microglial activation in organoids (41)”
    Quote in the paperSubstantial claim5 of 5 sources checked
    • cites [8] M. V. Sofroniew, Astrocyte reactivity: Subtypes, states, and functions in CNS innate immunity. Trends Immunol. 41, 758– 770 (2020). 32819810 PMC7484257 source
    • cites [9] J. M. Lawrence, K. Schardien, B. Wigdahl, M. R. Nonnemacher, Roles of neuropathology-associated reactive astrocytes: A systematic review. Acta Neuropathol. Commun. 11, 42 (2023). 36915214 PMC10009953 source
    • cites [15] M. A. Olude, A. Mouihate, O. A. Mustapha, C. Farina, F. J. Quintana, J. O. Olopade, Astrocytes and microglia in stress-induced neuroinflammation: The African perspective. Front. Immunol. 13, 795089 (2022). 35707531 PMC9190229 source
    • cites [40] A. Matejuk, R. M. Ransohoff, Crosstalk between astrocytes and microglia: An overview. Front. Immunol. 11, 1416 (2020). 32765501 PMC7378357 source
    • cites [41] E. Atherton, S. Brown, E. Papiez, M. I. Restrepo, D. A. Borton, Lipopolysaccharide-induced neuroinflammation disrupts functional connectivity and community structure in primary cortical microtissues. Sci. Rep. 11, 22303 (2021). 34785714 PMC8595892 source

      The Methods (Lipopolysaccharide challenge; page unavailable) report exposing 3D cortical microtissues to LPS, and the Discussion describes LPS-induced changes in glia, including microglia. The paper does not demonstrate microglial activation specifically; its reported outcome is neuronal network activity. It calls the cultures primary cortical microtissues, not organoids. Citation 41 is attached to the LPS portion of the citing sentence, not its separate description of cytokine stimulation in 2D cultures. (LLM, conf=0.86)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    A significant trigger for astrocyte reactivity is neuroinflammation, involving pro-inflammatory molecules like cytokines and chemokines.

    “A significant trigger for astrocyte reactivity is neuroinflammation, involving pro-inflammatory molecules like cytokines and chemokines (11–14).”
    Quote in the paperNot a substantial claim2 of 4 sources checked
    • cites [11] F. Leng, P. Edison, Neuroinflammation and microglial activation in Alzheimer disease: Where do we go from here? Nat. Rev. Neurol. 17, 157– 172 (2021). 33318676 source
    • cites [12] R. Dhapola, S. S. Hota, P. Sarma, A. Bhattacharyya, B. Medhi, D. H. Reddy, Recent advances in molecular pathways and therapeutic implications targeting neuroinflammation for Alzheimer’s disease. Inflammopharmacology 29, 1669– 1681 (2021). 34813026 PMC8608577 source
    • cites [13] M. C. Jurcău, F. L. Andronie-Cioara, A. Jurcău, F. Marcu, D. M. Ţiț, N. Pașcalău, D. C. Nistor-Cseppentö, The link between oxidative stress, mitochondrial dysfunction and neuroinflammation in the pathophysiology of Alzheimer’s disease: Therapeutic implications and future perspectives. Antioxidants 11, 2167 (2022). 36358538 PMC9686795 source
    • cites [14] A. Verkhratsky, A. M. Butt, Neuroglia: Function and Pathology (Elsevier, 2023). 37605551

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Varicose projection astrocytes have been previously described in aged or diseased human brains and not always found in all samples within the same species.

    “Varicose projection astrocytes have been previously described in aged or diseased human brains and not always found in all the samples within the same species (21, 22).”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [21] C. Falcone, E. L. McBride, W. D. Hopkins, P. R. Hof, P. R. Manger, C. C. Sherwood, S. C. Noctor, V. Martínez-Cerdeño, Redefining varicose projection astrocytes in primates. Glia 70, 145– 154 (2022). 34533866 source
    • cites [22] C. Ciani, C. Falcone, Interlaminar and varicose-projection astrocytes: Toward a new understanding of the primate brain. Front. Cell. Neurosci. 18, 1477753 (2024). 39655243 PMC11626530 source

      The Varicose-projection astrocytes section explicitly says these cells were not present in every individual within the same species. It reports no VP-As in fetal brains or in patients aged 5 or 10, but presents age, injury, and inflammation as possible explanations rather than establishing that VP-As had been described specifically in aged or diseased human brains. No page number is available in our copy. (LLM, conf=0.84)

      Experimental — accuracy not yet measured

  • Classified as probably not a substantial claim.

    Premisecitation

    Varicose projection astrocytes represent a distinct astrocyte population that were originally contemplated to be unique to humans and other hominoids.

    “Varicose projection astrocytes represent a distinct astrocyte population that were originally contemplated to be unique to humans and other hominoids (21, 22).”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [21] C. Falcone, E. L. McBride, W. D. Hopkins, P. R. Hof, P. R. Manger, C. C. Sherwood, S. C. Noctor, V. Martínez-Cerdeño, Redefining varicose projection astrocytes in primates. Glia 70, 145– 154 (2022). 34533866 source
    • cites [22] C. Ciani, C. Falcone, Interlaminar and varicose-projection astrocytes: Toward a new understanding of the primate brain. Front. Cell. Neurosci. 18, 1477753 (2024). 39655243 PMC11626530 source

      The Varicose-projection astrocytes section calls VP-As a distinct class and says they were initially described as “human-specific.” It says they were later found in apes but not other primates, so the claim captures their reported distribution but inaccurately places the broader human-and-ape understanding at the time of their original description. (LLM, conf=0.84)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Despite extensive studies in rodent models, the specific contributions of astrocytes to human pathology remain inadequately understood, partly due to species-specific differences.

    “Despite extensive studies in rodent models, the specific contributions of astrocytes to human pathology remain inadequately understood, partly due to species-specific differences (17–20).”
    Quote in the paperSubstantial claim4 of 4 sources checked
    • cites [17] N. A. Oberheim, T. Takano, X. Han, W. He, J. H. C. Lin, F. Wang, Q. Xu, J. D. Wyatt, W. Pilcher, J. G. Ojemann, B. R. Ransom, S. A. Goldman, M. Nedergaard, Uniquely hominid features of adult human astrocytes. J. Neurosci. 29, 3276– 3287 (2009). 19279265 PMC2819812 source

      The Introduction says glial research has relied largely on rodent brains, and the Discussion identifies human–rodent astrocyte differences that limit rodent models of human glial biology. The Discussion’s Caveats section says the analysis describes astrocytes in tissue deemed normal; it does not establish how well astrocytes’ contributions to human pathology are understood. Page numbers are not supplied in our copy. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • cites [18] C. Falcone, M. Wolf-Ochoa, S. Amina, T. Hong, G. Vakilzadeh, W. D. Hopkins, P. R. Hof, C. C. Sherwood, P. R. Manger, S. C. Noctor, V. Martínez-Cerdeño, Cortical interlaminar astrocytes across the therian mammal radiation. J. Comp. Neurol. 527, 1654– 1674 (2019). 30552685 PMC6465161 source

      The Discussion sections on pial ILA complexity and potential functions report species differences and say that nothing is currently known about interlaminar astrocyte involvement in disease (page numbers unavailable). They do not establish that astrocytes’ contributions to human pathology generally remain poorly understood because of species differences, or address the extent of rodent-model research. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
    • cites [19] A. Verkhratsky, M. Nedergaard, The homeostatic astroglia emerges from evolutionary specialization of neural cells. Philos. Trans. R. Soc. London Ser. B Biol. Sci. 371, 20150428 (2016). 27377722 PMC4938028 source

      Section 3, “Singular human astrocytes” (page unavailable), describes substantial differences between human and rodent astrocytes. Section 7, “Neuropathology as a homeostatic failure” (page unavailable), discusses astrocyte contributions to disease and includes a rat experiment. The paper does not say that their contributions to human pathology remain inadequately understood because of species differences, or characterize the extent of rodent-model research. (LLM, conf=0.82)

      Experimental — accuracy not yet measured
    • cites [20] K. Ciuba, A. Piotrowska, D. Chaudhury, B. Dehingia, E. Duński, R. Behr, K. Soroczyńska, M. Czystowska-Kuźmicz, M. Abbas, E. Bulanda, S. Gawlik-Zawiślak, S. Pietrzak, I. Figiel, J. Włodarczyk, A. Verkhratsky, M. Niedbała, W. Kaspera, T. Wypych, B. Wilczyński, A. Pękowska, Molecular signature of primate astrocytes reveals pathways and regulatory changes contributing to human brain evolution. Cell Stem Cell 32, 426– 444.e14 (2025). 39909043 source

      The Main section (p. 2) describes marked differences between rodent and primate astrocytes and says their evolutionary remodeling remains poorly understood. The Discussion (p. 9) says astrocyte malfunction contributes to brain disease. Neither passage says that extensive rodent-model research has left astrocytes’ specific contributions to human pathology inadequately understood because of species differences. (LLM, conf=0.83)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Microglia play a pivotal role by releasing factors such as TNF-α, IL-1β, and C1q, which trigger astrogliosis.

    “Microglia play a pivotal role by releasing factors such as tumor necrosis factor–α (TNF-α), interleukin-1β (IL-1β), and complement component 1q (C1q), which trigger astrogliosis (9, 15, 16).”
    Quote in the paperNot a substantial claim3 of 3 sources checked
    • cites [9] J. M. Lawrence, K. Schardien, B. Wigdahl, M. R. Nonnemacher, Roles of neuropathology-associated reactive astrocytes: A systematic review. Acta Neuropathol. Commun. 11, 42 (2023). 36915214 PMC10009953 source

      The “Microglia activation” section says activated microglia secrete TNF-α, IL-1α, and C1q, and that these signals convert non-reactive astrocytes to a reactive phenotype. It supports the mechanism and two of the three named factors, but specifies IL-1α rather than the claim’s IL-1β. No page number is provided in our copy. (LLM, conf=0.91)

      Experimental — accuracy not yet measured
    • cites [15] M. A. Olude, A. Mouihate, O. A. Mustapha, C. Farina, F. J. Quintana, J. O. Olopade, Astrocytes and microglia in stress-induced neuroinflammation: The African perspective. Front. Immunol. 13, 795089 (2022). 35707531 PMC9190229 source

      The Introduction’s “Astrocytes and Microglia Cross-Talk” section says microglia produce TNF-α and C1q that act on astrocytes to induce a neurotoxic phenotype. It identifies the third factor as IL-1α, not the claimed IL-1β, and describes neurotoxic activity rather than astrogliosis. Page numbers are not provided in our copy. (LLM, conf=0.90)

      Experimental — accuracy not yet measured
    • cites [16] D. Singh, Astrocytic and microglial cells as the modulators of neuroinflammation in Alzheimer’s disease. J. Neuroinflammation 19, 206 (2022). 35978311 PMC9382837 source

      In “Dysfunctional immune cross-talk cause neuroinflammation” (page not provided), the paper says activated microglia induce reactive A1 astrocytes by secreting IL-1α, TNF, and C1q. The claim matches the microglia-to-astrocyte effect and two factors, but substitutes IL-1β for IL-1α in the factor combination the paper identifies. (LLM, conf=0.90)

      Experimental — accuracy not yet measured

  • Classified as probably not a substantial claim.

    Premisecitation

    Under pathological conditions, astrocytes undergo reactive astrogliosis characterized by morphological and functional changes such as hypertrophy, process elongation, up-regulation of GFAP, or dynamic relocalization of proteins such as aquaporin-4.

    “Under pathological conditions, they undergo reactive astrogliosis, characterized by morphological and functional changes such as hypertrophy, process elongation, up-regulation of glial fibrillary acidic protein (GFAP) (2–5), or dynamic relocalization of proteins such as aquaporin-4 (6, 7).”
    Quote in the paperSubstantial claim6 of 6 sources checked
    • cites [2] B. Zhou, Y.-X. Zuo, R.-T. Jiang, Astrocyte morphology: Diversity, plasticity, and role in neurological diseases. CNS Neurosci. Ther. 25, 665– 673 (2019). 30929313 PMC6515705 source
    • cites [3] A. Verkhratsky, B. Li, C. Scuderi, V. Parpura, Principles of astrogliopathology. Adv. Neurobiol. 26, 55– 73 (2021). 34888830 PMC8999877 source

      The “Reactive Astrogliosis” section describes a response to pathology involving morphological and functional remodelling, and specifically reports hypertrophy and GFAP up-regulation. It describes changes in process thickness, sometimes with retraction of distal leaflets, but does not establish process elongation. The aquaporin-4 clause has its own citations (6, 7), so it is not attributed to this source in the printed sentence. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • cites [4] A. Verkhratsky, A. Butt, B. Li, P. Illes, R. Zorec, A. Semyanov, Y. Tang, M. V. Sofroniew, Astrocytes in human central nervous system diseases: A frontier for new therapies. Signal Transduct. Target. Ther. 8, 396 (2023). 37828019 PMC10570367 source
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  • Classified as probably not a substantial claim.

    Premisecitation

    Reactive astrocytes are not monolithic but exist on a spectrum influenced by context, region, and stimuli.

    “Emerging evidence suggests that reactive astrocytes are not monolithic but exist on a spectrum influenced by context, region, and stimuli.”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [5] C. Escartin, E. Galea, A. Lakatos, J. P. O’Callaghan, G. C. Petzold, A. Serrano-Pozo, C. Steinhäuser, A. Volterra, G. Carmignoto, A. Agarwal, N. J. Allen, A. Araque, L. Barbeito, A. Barzilai, D. E. Bergles, G. Bonvento, A. M. Butt, W.-T. Chen, M. Cohen-Salmon, C. Cunningham, B. Deneen, B. De Strooper, B. Díaz-Castro, C. Farina, M. Freeman, V. Gallo, J. E. Goldman, S. A. Goldman, M. Götz, A. Gutiérrez, P. G. Haydon, D. H. Heiland, E. M. Hol, M. G. Holt, M. Iino, K. V. Kastanenka, H. Kettenmann, B. S. Khakh, S. Koizumi, C. J. Lee, S. A. Liddelow, B. A. MacVicar, P. Magistretti, A. Messing, A. Mi source
    • cites [14] A. Verkhratsky, A. M. Butt, Neuroglia: Function and Pathology (Elsevier, 2023). 37605551

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationcitation

    The presence of EV markers, mitochondrial, Golgi, and ER components within varicosities indicates potential roles in cellular communication, metabolic stress management, and intercellular signaling under pathological or inflammatory conditions.

    “indicating potential roles in cellular communication, metabolic stress management, and intercellular signaling under pathological or inflammatory conditions, as previously reported for reactive astrocytes (26, 42, 43).”
    Quote in the paperSubstantial claim3 of 3 sources checked
    • cites [26] L. A. Mulcahy, R. C. Pink, D. R. F. Carter, Routes and mechanisms of extracellular vesicle uptake. J. Extracell. Vesicles 3, 24641 (2014). PMC4122821 25143819 source

      The Abstract (page unavailable) describes EV-mediated intercellular exchange, signaling, and a possible role in exchanging stress-response miRNAs. It does not link EV markers or mitochondrial, Golgi, and ER components in varicosities to those functions, nor does it report metabolic stress management in reactive astrocytes under pathological or inflammatory conditions. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • cites [42] B. Marchetti, L. Leggio, F. L’Episcopo, S. Vivarelli, C. Tirolo, G. Paternò, C. Giachino, S. Caniglia, M. F. Serapide, N. Iraci, Glia-derived extracellular vesicles in Parkinson’s disease. J. Clin. Med. 9, 1941 (2020). 32575923 PMC7356371 source

      Split into 2 atoms — 1 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured
    • cites [43] L. Leggio, F. L’Episcopo, A. Magrì, M. J. Ulloa-Navas, G. Paternò, S. Vivarelli, C. A. P. Bastos, C. Tirolo, N. Testa, S. Caniglia, P. Risiglione, F. Pappalardo, A. Serra, P. García-Tárraga, N. Faria, J. J. Powell, L. Peruzzotti-Jametti, S. Pluchino, J. M. García-Verdugo, A. Messina, B. Marchetti, N. Iraci, Small extracellular vesicles secreted by nigrostriatal astrocytes rescue cell death and preserve mitochondrial function in Parkinson’s disease. Adv. Healthc. Mater. 11, e2201203 (2022). 35856921 PMC11468249 source

      Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured

  • May combine two claims.

    Findingown data

    In mixed cultures containing mature astrocytes and neurons, cytokine-treated samples have a higher number of varicose projection astrocytes compared to control, with a more pronounced increase under combined treatment.

    “We found a higher number of varicose projection astrocytes in the cytokine-treated samples compared to control samples, where the presence of varicosities was much lower, with a more pronounced increase under the combined treatment condition (fig. S7).”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    All identified varicose projection astrocytes in hNSC-derived cultures were consistently positive for additional astrocytic markers, supporting their astrocyte identity and excluding contamination by other cell types.

    “Notably, all identified varicose projection astrocytes were consistently positive for these additional astrocytic markers, supporting their astrocyte identity and excluding contamination by other cell types.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    Calnexin is present in varicose projection astrocytes, colocalizing with GFAP at the level of varicosities.

    “Calnexin, an ER membrane protein involved in protein folding and quality control (30), was also present in varicose projection astrocytes, as evidenced by colocalization with GFAP at the level of varicosities (Fig. 4, I and J).”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    Varicose projection astrocytes are present in mice and tigers.

    “establishing their presence in mice and tigers and their link to neuropathology and neuroinflammation”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    Varicose projection astrocytes in other mammals are scattered and individual specific, for example present in three of five tiger samples.

    “varicose projection astrocytes in other mammals are scattered and individual specific (for example, varicose projection astrocytes were present in three of five samples of tigers)”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    Varicose projection astrocytes are rare or absent in control hiPSC-derived astrocyte cultures at day 7 and are not observed under any condition before day 5.

    “In contrast, varicose projection astrocytes were rare or absent in the control cultures at D7 and were not observed under any condition before D5”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    When the neurodegenerative disorder is at an advanced state, varicosities increase in number and size.

    “When the neurodegenerative disorder is at an advanced state, varicosities increase in number and size, consistent with the stressed state of the astrocytes (Fig. 6, E to G).”
    Quote in the paperSubstantial claim

  • The quote only partly states this claim.

    Findingown data

    Varicose projection astrocyte density is significantly increased in older human brains (aged 77-81 years) compared to younger mid-age controls (31-61 years) (younger = 0.69 ± 0.14%, aged = 10.85 ± 0.16%, P < 10 × 10−7).

    “Our analysis revealed a significant increase in varicose projection astrocytes in older brains compared to younger ones, further supporting the idea that varicose projection astrocytes may emerge in response to accumulated cellular stress or pathological processes associated with aging (density of varicose projection astrocytes calculated as GFAP+ varicose projection astrocytes/total no. of GFAP+”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    All tested markers (CD9, CD63, and integrin β1) were detected within varicosities, but their distribution along astrocytic processes was not homogeneous.

    “Although all tested markers (including CD9, CD63, and integrin β1) were detected within varicosities, their distribution along the astrocytic processes was not homogeneous.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    Control specimens contained some, but much fewer, varicose projection astrocytes.

    “Notably, control specimens contained some (but much fewer) varicose projection astrocytes”
    Quote in the paperSubstantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Findingreasoning

    Classification of varicose projection astrocytes relied on the presence of discrete, regularly spaced varicosities, a feature that was absent in most reactive astrocytes and selectively enriched following inflammatory stimulation.

    “classification relied on the presence of discrete, regularly spaced varicosities, a feature that was absent in most reactive astrocytes and selectively enriched following inflammatory stimulation.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    Integrin β1 is enriched within varicosities.

    “the enrichment of integrin β1 within varicosities is intriguing and suggests potential molecular specialization”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    Varicosities contain EV markers, components of mitochondria, Golgi complex, and ER.

    “We revealed the presence of EV markers, components of mitochondria, Golgi complex, and ER within varicosities”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    The morphological change of varicose projection astrocytes is a common astrocytic reaction and not something related to a single subpopulation of astrocytes.

    “suggesting that this morphological change is a common astrocytic reaction and not something related to a single subpopulation of astrocytes”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    Varicose projection astrocytes emerge in response to inflammatory stimulation within a physiologically relevant human 3D system, reinforcing their association with neuroinflammatory conditions.

    “These findings indicate that varicose projection astrocytes emerge in response to inflammatory stimulation within a physiologically relevant human 3D system, reinforcing their association with neuroinflammatory conditions.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    Varicose projection astrocytes are characterized by distinctive subcellular features, indicating involvement in cellular stress responses.

    “characterized by distinctive subcellular features, indicating involvement in cellular stress responses”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    Varicose projection astrocytes are not a physiological subtype of astrocytes, but their presence might be due to neuroinflammatory conditions.

    “These findings together provide the proof of principle that varicose projection astrocytes are not a physiological subtype of astrocytes, but their presence might be due to neuroinflammatory conditions.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    Varicose projection astrocytes are a transient phenomenon, appearing only under sustained neuroinflammatory conditions.

    “These findings indicate that varicose projection astrocytes are a transient phenomenon, appearing only under sustained neuroinflammatory conditions.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Study design and conductown data

    The astrocytic identity of hiPSC-derived cultured cells was confirmed by immunostaining for canonical markers (S100β, SOX9, AQP4, and Kir4.1), with >92% of cells positive for SOX9, AQP4, and Kir4.1.

    “The astrocytic identity of cultured cells was confirmed by immunostaining for canonical markers (S100β, SOX9, AQP4, and Kir4.1), with >92% of cells positive for SOX9, AQP4, and Kir4.1 (fig. S1).”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    Varicose projection astrocytes harbor a range of EV markers and intracellular organelles, suggesting a potential role in cellular communication and stress responses under inflammatory conditions.

    “This characterization demonstrates that varicose projection astrocytes harbor a range of EV markers and intracellular organelles, suggesting their potential role in cellular communication and stress responses under inflammatory conditions.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    The scattered and individual-specific occurrence of varicose projection astrocytes supports that they are not a distinct physiological subtype but rather emerge under specific brain conditions, possibly reflecting accumulated pathological burden.

    “This pattern further supports our hypothesis that varicose projection astrocytes are not a distinct physiological subtype but rather emerge under specific brain conditions, possibly reflecting accumulated pathological burden.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Study design and conductown data

    Cytokine concentrations for mixed culture were optimized to maintain cell viability, with 10 ng/ml for each cytokine identified as the optimal dose for inducing astrocyte reactivity.

    “We optimized cytokine concentrations for mixed culture to maintain cell viability, with each cytokine (10 ng/ml) identified as the optimal dose for inducing astrocyte reactivity (concentrations tested for each cytokine were 1, 10, and 30 ng/ml for 7 days; fig. S6).”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationown data

    Varicose projection astrocytes represent a hallmark of a subpopulation of reactive astrocytes under neuropathological conditions, with widespread occurrence across cortical and subcortical regions in both neurodegenerative and epileptic pathologies.

    “These findings underscore that varicose projection astrocytes represent a hallmark of a subpopulation of reactive astrocytes under neuropathological conditions, with widespread occurrence across cortical and subcortical regions in both neurodegenerative and epileptic pathologies.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    The observed increase in varicose projection astrocytes in aged human brains compared to younger samples suggests that their accumulation may be linked to age-related brain changes, potentially driven by chronic cellular stress or the gradual onset of pathological processes.

    “the observed increase in varicose projection astrocytes in aged human brains compared to younger samples suggests that their accumulation may be linked to age-related brain changes, potentially driven by chronic cellular stress or the gradual onset of pathological processes.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Varicosities have been reported in ferret astrocytes, in radial glial cells of early postnatal cats, and in neonatal pigs under hypoxia.

    “varicosities have been reported in ferret astrocytes (23), in radial glial cells of early postnatal cats (44), and in neonatal pigs under hypoxia (45).”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites [23] N. C. Tai, Y. Shinmyo, H. Kawasaki, Astrocyte diversity in the ferret cerebrum revealed with astrocyte-specific genetic manipulation. Glia 72, 1862– 1873 (2024). 38884631 source
    • cites [44] A. K. Engel, C. M. Müller, Postnatal development of vimentin-immunoreactive radial glial cells in the primary visual cortex of the cat. J. Neurocytol. 18, 437– 450 (1989). 2809633 source
    • cites [45] S. M. Sullivan, S. T. Björkman, S. M. Miller, P. B. Colditz, D. V. Pow, Morphological changes in white matter astrocytes in response to hypoxia/ischemia in the neonatal pig. Brain Res. 1319, 164– 174 (2010). 20079338 source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    The observed reversibility of varicose projection astrocyte formation upon cytokine withdrawal indicates potential therapeutic avenues for modulating their emergence and pathological effects.

    “The observed reversibility of varicose projection astrocyte formation upon cytokine withdrawal indicates potential therapeutic avenues for modulating their emergence and pathological effects.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    For in vitro experiments, biological replicates corresponded to independent differentiation and treatment experiments performed on separate cultures.

    “For in vitro experiments, biological replicates corresponded to independent differentiation and treatment experiments performed on separate cultures; for in vivo analyses, biological replicates corresponded to independent animals or human samples, as specified in the figure legends.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationown data

    Varicose projection-like morphologies emerge in vivo under inflammatory and traumatic conditions, supporting their biological relevance rather than being culture-induced artifacts.

    “These results demonstrate that varicose projection-like morphologies emerge in vivo under inflammatory and traumatic conditions, supporting their biological relevance rather than a culture-induced artifacts.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisereasoning

    The standard practice of storing larger animal brains in refrigerators at 4°C for several hours until necropsy prevents damages caused by prolonged postmortem intervals, thereby preserving tissue quality and staining results.

    “This standard practice prevents damages caused by prolonged postmortem intervals, thereby preserving tissue quality and staining results.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: Following death, autolysis begins to decompose biological tissues, including the brain.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    For in vivo analyses, biological replicates corresponded to independent animals or human samples.

    “For in vitro experiments, biological replicates corresponded to independent differentiation and treatment experiments performed on separate cultures; for in vivo analyses, biological replicates corresponded to independent animals or human samples, as specified in the figure legends.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Study design and conductown data

    Immunocompetent organoids generated were positive for neuronal (SMI31 and MAP2), astrocytic (GFAP and S100b), oligodendrocytic (Sox10 and NogoA), and microglial (Iba1 and CD68) markers.

    “Immunocompetent organoids generated were positive for the neuronal (SMI31 and MAP2), astrocytic (GFAP and S100b), oligodendrocytic (Sox10 and NogoA), and microglial (Iba1 and CD68) markers.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S1 (asserted). The quote only partly states this claim.

    Interpretationown data

    Varicose projection astrocytes accumulate progressively with aging.

    “One explanation for their apparent scarcity in nonhominoid species could be that varicose projection astrocytes accumulate progressively with aging, consistent with our hypothesis of accumulated lifelong pathological burden.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Before statistical analysis, data were tested for normality using the Shapiro-Wilk test.

    “Before statistical analysis, data were tested for normality using the Shapiro-Wilk test.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Study design and conductnone given

    For NF-κB translocation and varicose projection astrocyte counts, data were obtained from at least three independent biological replicates per type of experiment.

    “For NF-κB translocation and varicose projection astrocyte counts, data were obtained from at least three independent biological replicates per type of experiment.”
    Quote in the paperSubstantial claim
44 of 44

  • The paper relies on this without support.

    Varicose projection astrocytes identified in vitro by the presence of regularly spaced bead-like varicosities along astrocytic processes correspond to the same cell type described in vivo in human/hominoid tissue.

    “Given the differences between astrocyte morphology in vitro and in intact tissue, varicose projection astrocytes in culture were identified on the basis of the presence of regularly spaced, bead-like varicosities along discernible astrocytic processes, irrespective of absolute process length.”

  • The paper relies on this without support.

    LPS-induced inflammation in human cortical organoids and mice is a valid model of neuroinflammation relevant to human neuropathology.

    “To assess whether varicose projection astrocytes could be induced by inflammatory stimuli, we treated 4-month-old organoids with LPS (10 ng/ml) for 24 hours and performed GFAP IF staining.”

  • The paper relies on this without support.

    The mouse controlled cortical impact (CCI) model is a valid model of traumatic brain injury relevant to human neuropathology.

    “First, we used a controlled cortical impact (CCI) model, in which a single cortical injury was induced using a 1.1-mm stainless steel flat-tip impactor 11-week-old mice, as previously described (35).”

  • The paper relies on this without support.

    Sparse TdTomato labeling in Aldh1l1CreERt2::floxTdTomato mice labels a representative subset of astrocytes.

    “We used a transgenic line expressing a tamoxifen-dependent Cre recombinase driven by the astrocyte-specific Aldh1l1 promoter, along with a Cre-dependent TdTomato reporter (Aldh1l1CreERt2::floxTdTomato), enabling sparse astrocyte labeling after tamoxifen administration.”

  • The paper relies on this without support.

    In vitro systems can produce nonphysiological morphologies.

    “We acknowledge that in vitro systems can produce nonphysiological morphologies”

  • The paper relies on this without support.

    Aging is linked to the accumulation of various brain stressors and pathological burden.

    “Given that aging is linked to the accumulation of various brain stressors and pathological burden”

  • The paper relies on this without support.

    Following death, autolysis begins to decompose biological tissues, including the brain.

    “Following death, autolysis begins to decompose biological tissues, including the brain.”
7 of 7

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.

  • Area 3 is assigned conflicting Fig. 5 panels

    Minor

    The Results cite Fig. 5F for Area 3, while the figure caption assigns Area 3 to panel G.

  • Fig. 6 labels panel N as both control and PD

    Minor

    The Fig. 6 caption places panel N in both the control and PD image groups.

  • Mouse culture group has fewer than three replicates

    Minor

    The statistical methods specify at least three independent biological replicates per experiment, whereas the Fig. 5 mouse-culture analysis lists two for one group.

  • Mixed-culture dose lists disagree

    Minor

    The Results say the tested concentrations were 1, 10, and 30 ng/ml for each cytokine; the Methods also list a 100 ng/ml combined treatment.

  • Astrocyte-volume treatment duration disagrees

    Minor

    The quantification method says astrocytes were treated for one hour to measure GFAP+ volume, but the reported volume measurement is after seven days of treatment.

  • Fig. 1 assigns two scale bars to panel H

    Minor

    The Fig. 1 caption assigns panel H both a 50-μm and a 25-μm scale bar.

6 of 6

Cites

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Authors
Ciani, C., Pistorio, G., Giancola, S., Mearelli, M., Mongelli, F. E., Forouzeh, D., Campos Soares, L., Gonzalez Martin, M., Lichtenstein, M. E., Mio, L., Christou, E., Hastings, K., Nguyen Do, A. Q., Ramos-Gonzalez, P., Matute, C., Kuliesiute, U., Dötterer, S. E., Luksys, G., Rocka, S., Neniskyte, U., Anthony, D. C., Ayub, M., Centelleghe, C., Arevalo, M. A., Graïc, J.-M., Petrelli, F., Verkhratsky, A., Iraci, N., Cavaliere, F., Muñoz-Ballester, C., Salman, M. M., Ulloa Severino, F. P., & Falcone, C.
Affiliations
  • Scuola Internazionale Superiore di Studi Avanzati (IT)
  • Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford OX1 3PT, UK.
  • Cajal Institute (CSIC), Madrid, Spain.
  • University of Maryland, Baltimore County (US)
  • Towson University (US)
  • Department of Biological Sciences, Towson University, Towson, MD, USA.
  • Achucarro Basque Center for Neuroscience, The Basque Biomodels Platforms for Human Research, Leioa, Spain.
  • University of the Basque Country (ES)
  • Institute of Biosciences, Life Sciences Center, Vilnius University, Vilnius, Lithuania.
  • Vilnius University (LT)
  • Faculty of Medicine, Translational Health Research Institute, Vilnius University, Vilnius, Lithuania.
  • CIBERNED, Madrid, Spain.
  • University of Oxford (GB)
  • University of Padua (IT)
  • University of Rome Tor Vergata (IT)
  • University of Manchester (GB)
  • University of Catania (IT)
  • Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD, USA.
  • British Heart Foundation (GB)
Corresponding author
Falcone, Carmen
ORCID
Venue
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Published
2026-07-17
Volume
12
Issue
29
Pages
eady8204-eady8204
ISSN
2375-2548 (ISSN-L)
DOI
10.1126/sciadv.ady8204
PMC
PMC13378549
OpenAlex
W7169585658
Cited by
4
References
54
Citations by year
2026: 4
FWCI
11.09
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Science Advances (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, other-oa)
  • IRIS (submittedVersion)
  • Research Explorer (The University of Manchester) (submittedVersion, cc-by)
  • Padua Research Archive (University of Padova) (submittedVersion, cc-by)
  • Digital Repository at the University of Maryland (University of Maryland College Park)
Funders
National Institutes of Health (5u54ca272205-03)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
astrocyte activation, reactive astrocytes, neuroinflammation, astrocyte morphology, aging, cellular stress response, disease models
MeSH terms
Animals, Astrocytes, Brain, Humans, 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 2026-10-30.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-30.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

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