Altered differentiation of neural stem cells in fragile X syndrome
Open accessAbstract
Fragile X syndrome, a common form of inherited mental retardation, is caused by the absence of the fragile X mental retardation protein (FMRP) due to a mutation in the FMR1 gene. We investigated the differentiation of neural stem cells generated from the brains of fmr1- knockout (KO) mice and from postmortem tissue of a fragile X fetus. Mouse and human FMRP-deficient neurospheres generated more TuJ1-positive cells (3-fold and 5-fold, respectively) than the control neurospheres generated from normal mouse and human brains, and these cells showed morphological alterations with fewer and shorter neurites and a smaller cell body volume. The number of cells expressing glial fibrillary acidic protein and generated by these neurospheres was reduced because of increased apoptotic cell death. Furthermore, there was an increase in a population of cells with intense oscillatory Ca 2+ responses to neurotransmitters in differentiated cells lacking FMRP. In addition, the number of cells in a cohort of bromodeoxyuridine-labeled newborn cells was increased in the subventricular zone of the telencephalon of the fmr1 -KO mouse in vivo . These results demonstrate substantial alterations in the early maturation of FMRP-deficient neural stem cells in fragile X syndrome and in the fmr1 -KO mice.
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The early reduction in parvalbumin cell number may occur because of abnormal interneuron differentiation and migration during embryonic development.
“This early reduction in the number of PV cells may occur due to abnormal interneuron differentiation and migration during embryonic development (Castrén et al. 2005;reviewed in Castrén 2016).”
From Genetic Reduction of Matrix Metalloproteinase-9 Promotes Formation of Perineuronal Nets Around Parvalbumin-Expressing Interneurons and Normalizes Auditory Cortex Responses in Developing Fmr1 Knock-Out Mice (2018) · cites this paper as Castrén et al. 2005
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ResultAberrant differentiation of glutamatergic cells in neocortex of mouse model for fragile X syndrome.
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- Authors
- Castrén, M., Tervonen, T., Kärkkäinen, V., Heinonen, S., Castrén, E., Larsson, K., Bakker, C. E., Oostra, B. A., & Åkerman, K.
- Affiliations
- University of Helsinki (FI)
- Neuroscience Center, University of Helsinki, P.O. Box 56, 00014 Helsinki, Finland; A. I. Virtanen Institute and Department of Obstetrics and Gynecology, University of Kuopio, P.O. Box 1627, 70211 Finland; and Department of Clinical Genetics, Erasmus Medical Center, Doctor Molewaterplein 50, 3000 DR Rotterdam, The Netherlands
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 2005-11-28
- Volume
- 102
- Issue
- 49
- Pages
- 17834-17839
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC1308923
- OpenAlex
- W2014081519
- Cited by
- 176
- References
- 41
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 4 · 2023: 3 · 2022: 2 · 2021: 5 · 2020: 12 · 2019: 12 · 2018: 6 · 2017: 11 · 2016: 12 · 2015: 13 · 2014: 21 · 2013: 15 · 2012: 13
- FWCI
- 2.35
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
- Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Fetal and Pediatric Neurological Disorders
- Keywords
- fragile X syndrome, FMRP, neural stem cells, neurospheres, neuronal differentiation, Fmr1 knockout mice, neurite morphology, glial fibrillary acidic protein, apoptosis, calcium oscillations, subventricular zone, telencephalon, neurogenesis, intellectual disability
- MeSH terms
- Animals, Calcium, Cell Differentiation, Cells, Cultured, Fragile X Syndrome, Neurons, Stem Cells, Mice, Knockout, Mice, Fragile X Messenger Ribonucleoprotein 1, Fragile X Mental Retardation Protein
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.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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