Neurogenin3 inhibits proliferation in endocrine progenitors by inducing Cdkn1a.

ABSTRACT: During organogenesis, the final size of mature cell populations depends on their rates of differentiation and expansion. Because transient expression of Neurogenin3 (Neurog3) in progenitor cells in the developing pancreas initiates their differentiation to mature islet cells, we examined the role of Neurog3 in cell cycle control during this process. We found that mitotically active pancreatic progenitor cells in mouse embryos exited the cell cycle after the initiation of Neurog3 expression. Transcriptome analysis demonstrated that the Neurog3-expressing cells dramatically up-regulated the mRNA encoding cyclin-dependent kinase inhibitor 1a (Cdkn1a). In Neurog3 null mice, the islet progenitor cells failed to activate Cdkn1a expression and continued to proliferate, showing that their exit fro

SUBMITTER: Miyatsuka T 

PROVIDER: S-EPMC3017196 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature