例如:"lncRNA", "apoptosis", "WRKY"

The T-box gene tbx-2, the homeobox gene egl-5 and the asymmetric cell division gene ham-1 specify neural fate in the HSN/PHB lineage.

Genetics. 2008 Jun;179(2):887-98. Epub 2008 May 27
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摘要


Understanding how neurons adopt particular fates is a fundamental challenge in developmental neurobiology. To address this issue, we have been studying a Caenorhabditis elegans lineage that produces the HSN motor neuron and the PHB sensory neuron, sister cells produced by the HSN/PHB precursor. We have previously shown that the novel protein HAM-1 controls the asymmetric neuroblast division in this lineage. In this study we examine tbx-2 and egl-5, genes that act in concert with ham-1 to regulate HSN and PHB fate. In screens for mutants with abnormal HSN development, we identified the T-box protein TBX-2 as being important for both HSN and PHB differentiation. TBX-2, along with HAM-1, regulates the migrations of the HSNs and prevents the PHB neurons from adopting an apoptotic fate. The homeobox gene egl-5 has been shown to regulate the migration and later differentiation of the HSN. While mutations that disrupt its function show no obvious role for EGL-5 in PHB development, loss of egl-5 in a ham-1 mutant background leads to PHB differentiation defects. Expression of EGL-5 in the HSN/PHB precursor but not in the PHB neuron suggests that EGL-5 specifies precursor fate. These observations reveal a role for both EGL-5 and TBX-2 in neural fate specification in the HSN/PHB lineage.

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