期刊
CURRENT OPINION IN GENETICS & DEVELOPMENT
卷 20, 期 4, 页码 362-368出版社
CURRENT BIOLOGY LTD
DOI: 10.1016/j.gde.2010.04.010
关键词
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资金
- National institutes of Health [R01NS039996-05, R01NS050266-03]
- Howard Hughes Medical Institute
- EMBO and HFSPO
Lineage-based mechanisms are widely used to generate cell type diversity in both vertebrates and invertebrates. For the past few decades, the nematode Caenorhabditis elegans has served as a primary model system to study this process because of its fixed and well-characterized cell lineage. Recent studies conducted at the level of single cells and individual cis-regulatory elements suggest a general model by which cellular diversity is generated in this organism. During its developmental history a cell passes through multiple transient regulatory states characterized by the expression of specific sets of transcription factors. The transition from one state to another is driven by a general binary decision mechanism acting at each successive division in a reiterative manner and ending up with the activation of the terminal differentiation program upon terminal division. A similar cell fate specification system seems to play a role in generating cellular diversity in the nervous system of more complex organisms such as Drosophila and vertebrates.
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