Experimental Sey mouse chimeras reveal the developmental deficiencies of Pax6-null granule cells in the postnatal cerebellum
Open accessAbstract
Pax6 has been implicated in cerebellar granule cell development, however the neonatal lethality of the Sey/Sey mutant has precluded a more detailed study of this late developing neuronal type. In this study we use experimental mouse chimeras made from wildtype and Pax6-null embryos to circumvent early lethality and assess the developmental potential of mutant cells in the construction of the cerebellum. We have identified the granule cell as a direct target of mutant gene action, with glia and Purkinje cells being affected in what is largely a non-cell autonomous manner. Most dramatically, in postnatal day 21 (P21) chimeras, mutant cells are largely absent in the anterior and posterior cerebellum while present in central lobules, but amidst disorganized cerebellar architecture. Analysis of P0/1 and P10 chimeras demonstrates a profound temporally based defect where mutant cells colonize the anterior and posterior EGL but fail to migrate to the IGL. Mutant granule cells in the central lobules can reach the IGL in an abnormal manner, with large streams of cells forming raphes through the molecular layer. These studies provide new insights into the role of Pax6 in postnatal cerebellar development that pinpoint the granule cell as an intrinsic target of the mutant gene and key events in the life of the developing granule cell that depend upon normal Pax6 expression.
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Pax6 plays a cell-intrinsic role in granule cell development.
“it has recently been shown to play a cell-intrinsic role in granule cell development [278].”
From Consensus Paper: Pathological Role of the Cerebellum in Autism (2012) · cites this paper as [278]
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Consensus Paper: Pathological Role of the Cerebellum in Autism
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- Authors
- Swanson, D. J., & Goldowitz, D.
- Affiliations
- University of British Columbia (CA)
- Corresponding author
- Swanson, Douglas J.
- ORCID
- Goldowitz, Dan
- Venue
- Developmental Biology
- Publisher
- Elsevier BV
- Published
- 2011-03
- Volume
- 351
- Issue
- 1
- Pages
- 1-12
- ISSN
- 0012-1606 (ISSN-L)
- OpenAlex
- W1971139891
- Cited by
- 40
- References
- 49
- Citations by year
- 2026: 2 · 2024: 9 · 2023: 2 · 2022: 2 · 2021: 6 · 2020: 1 · 2019: 1 · 2018: 3 · 2016: 3 · 2015: 2 · 2014: 1 · 2013: 3 · 2012: 3
- FWCI
- 0.81
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Developmental Biology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- NIH (R01 HD52472)
- Topics
- Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Fetal and Pediatric Neurological Disorders
- Keywords
- Pax6, cerebellar granule cells, cerebellar development, mouse chimeras, Purkinje cells, glia, external granular layer, internal granular layer, cell migration, molecular layer, postnatal development, non-cell-autonomous effects
- MeSH terms
- PAX6 Transcription Factor, Animals, Animals, Newborn, Cell Differentiation, Cell Movement, Cerebellum, Chimera, Eye Proteins, Female, Mice, Inbred BALB C, Mice, Inbred ICR, Mice, Neurologic Mutants, Neurons, Phenotype, Repressor Proteins, Homeodomain Proteins, Ki-67 Antigen, Mice, Paired Box Transcription Factors
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