Cited by 38Neurogenesis and neuroplasticity mechanismsDown syndrome and intellectual disability researchPluripotent Stem Cells Research

Altered patterning of trisomy 21 interneuron progenitors

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Giffin-Rao, Yathindar, Sheng, Jie, Strand, Bennett, Xu, Ke, Huang, Leslie, Medo, Margaret, Risgaard, Kirstin A., Dantinne, Samuel +11 more·2022·Stem Cell Reports

Published version of a preprint

Abstract

Individuals with Down syndrome (DS; Ts21), the most common genetic cause of intellectual disability, have smaller brains that reflect fewer neurons at pre- and post-natal stages, implicating impaired neurogenesis during development. Our stereological analysis of adult DS cortex indicates a reduction of calretinin-expressing interneurons. Using Ts21 human induced pluripotent stem cells (iPSCs) and isogenic controls, we find that Ts21 progenitors generate fewer COUP-TFII+ progenitors with reduced proliferation. Single-cell RNA sequencing of Ts21 progenitors confirms the altered specification of progenitor subpopulations and identifies reduced WNT signaling. Activation of WNT signaling partially restores the COUP-TFII+ progenitor population in Ts21, suggesting that altered WNT signaling contributes to the defective development of cortical interneurons in DS.

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Crossref · 10.1016/j.stemcr.2022.05.001

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  • Reduced neurogenesis occurs in both humans with DS-AD and DS mouse models.

    “We expected to find specific alterations in the DG due to reduced neurogenesis in both humans with DS‐AD and DS mouse models. 38 , 39”

    From Disruption of hippocampal upstream regulators of mTOR and insulin pathways in Down syndrome with Alzheimer's disease neuropathology: Preliminary observations (2026) · cites this paper as [38]

    The Introduction (page unavailable) links fewer neurons in people with Down syndrome to reduced neurogenesis. The References section (page unavailable) lists a study of decreased cell proliferation in the dentate gyrus of Down syndrome fetuses and in Ts65Dn mice. Neither passage establishes reduced neurogenesis specifically in humans with DS-AD, so the claim extends beyond what this paper supports. (LLM, conf=0.85)

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  • Several studies have shown that fewer interneurons are present in the cortex of individuals with Down syndrome than in controls, suggesting that reduced generation of interneurons contributes to the overall reduced neurogenesis in Down syndrome.

    “Several studies have shown that fewer interneurons are present in the cortex of individuals with DS44,46,84 than in that of controls, suggesting that reduced generation of interneurons contributes to the overall reduced neurogenesis in DS.”

    From Consequences of trisomy 21 for brain development in Down syndrome (2024) · cites this paper as [84]

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

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  • Evidence for specific deficits in late-born upper-layer neurons in Down syndrome from observations of post-mortem tissue suggests that specific temporally defined progenitors are affected.

    “Evidence for specific deficits in late-born upper-layer neurons in DS from observations of post-mortem tissue further suggests that specific temporally defined progenitors are affected41,84.”
  • Evidence from induced pluripotent stem cells differentiated to ventral forebrain-like interneuron progenitors indicates that the number of progenitors produced is different in the presence of trisomy 21.

    “Evidence from iPSCs differentiated to ventral forebrain-like interneuron progenitors indicates that the number of progenitors that are produced is different in the presence of T21 (84,90,91).”
  • The S6 kinases (S6Ks) are activated by the mTORC1 complex acting as effectors.

    “The S6 kinases (S6Ks) are activated by the mTORC1 complex acting as effectors.”

    From Disruption of hippocampal upstream regulators of mTOR and insulin pathways in Down syndrome with Alzheimer's disease neuropathology: Preliminary observations (2026) · cites this paper as [38]

    The Results sections on Ts21 progenitors discuss WNT and SHH signaling, but do not address whether mTORC1 activates S6 kinases. Searches for mTORC1, S6 kinase activation, and S6Ks returned no passage supporting the claim; page numbers were unavailable in our copy. (LLM, conf=0.72)

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Authors
Giffin-Rao, Y., Sheng, J., Strand, B., Xu, K., Huang, L., Medo, M., Risgaard, K. A., Dantinne, S., Mohan, S., Keshan, A., Daley, R. A., Levesque, B., Amundson, L., Reese, R., Sousa, A. M. M., Tao, Y., Wang, D., Zhang, S.-C., & Bhattacharyya, A.
Affiliations
University of Wisconsin–Madison (US)
Corresponding author
Bhattacharyya, Anita
Venue
Stem Cell Reports
Publisher
Elsevier BV
Published
2022-06
Volume
17
Issue
6
Pages
1366-1379
ISSN
2213-6711 (ISSN-L)
OpenAlex
W4281558139
Cited by
38
References
84
Citations by year
2026: 9 · 2025: 8 · 2024: 11 · 2023: 8 · 2022: 2
FWCI
2.66
Type
journal article
Language
en
Open access
Locations
  • Stem Cell Reports (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nd)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • University of Wisconsin Madison
  • College of Engineering, University of Wisconsin-Madison
  • National Institutes of Health (1R01HD106197, R03HD083538, R21NS105339)
  • Wisconsin Alumni Research Foundation
  • National Institute of Child Health and Human Development (U54 HD090256)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Down syndrome and intellectual disability research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
Keywords
Down syndrome, COUP-TFII, Wnt signaling, calretinin, neurogenesis, intellectual disability, iPSC-derived neurons, progenitor cell proliferation
MeSH terms
Adult, Down Syndrome, Humans, Interneurons, Neurons, Trisomy, Neurogenesis, Induced Pluripotent Stem Cells

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