Cerebellar GABAergic progenitors adopt an external granule cell-like phenotype in the absence of Ptf1a transcription factor expression.

Pascual M, Abasolo I, Mingorance-Le Meur A, Martínez A, Del Rio JA, Wright CV, Real FX, Soriano E
Proc Natl Acad Sci U S A. 2007 104 (12): 5193-8

PMID: 17360405 · PMCID: PMC1829285 · DOI:10.1073/pnas.0605699104

We report in this study that, in the cerebellum, the pancreatic transcription factor Ptf1a is required for the specific generation of Purkinje cells (PCs) and interneurons. Moreover, granule cell progenitors in the external GCL (EGL) appear to be unaffected by deletion of Ptf1a. Cell lineage analysis in Ptf1a(Cre/Cre) mice was used to establish that, in the absence of Ptf1a expression, ventricular zone progenitors, normally fated to produce PCs and interneurons, aberrantly migrate to the EGL and express typical markers of these cells, such as Math1, Reelin, and Zic1/2. Furthermore, these cells have a fine structure typical of EGL progenitors, indicating that they adopt an EGL-like cell phenotype. These findings indicate that Ptf1a is necessary for the specification and normal production of PCs and cerebellar interneurons. Moreover, our results suggest that Ptf1a is also required for the suppression of the granule cell specification program in cerebellar ventricular zone precursors.

MeSH Terms (19)

Animals Cell Lineage Cell Proliferation Cell Survival Cerebral Ventricles Embryo, Mammalian Female gamma-Aminobutyric Acid Gene Expression Regulation Genes, Reporter Integrases Interneurons Mice Models, Biological Phenotype Purkinje Cells RNA, Messenger Stem Cells Transcription Factors

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