4.4 Article

A novel role for zebrafish zic2a during forebrain development

期刊

DEVELOPMENTAL BIOLOGY
卷 317, 期 1, 页码 325-335

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ydbio.2008.02.029

关键词

zic; arx; dlx2a; forebrain; prethalamus; preoptic area

资金

  1. NIGMS NIH HHS [R01 GM076244, R01 GM076244-03] Funding Source: Medline

向作者/读者索取更多资源

Patterns of transcription factor expression establish a blueprint for the vertebrate forebrain early in embryogenesis. In the future diencephalon, several genes with patterned expression have been identified, yet their specific functions and interactions between them are not well understood. We have uncovered a crucial role for one such gene, zic2a, during formation of the anterior diencephalon in zebrafish. We show that zic2a is required for transcription of the prethalamic markers arx and dlx2a. This function is required during early steps of prethalamic development, soon after its specification. zic genes are evolutionarily related to glis, transcription factors that mediate hedgehog signaling. Intriguingly, the hedgehog signaling pathway also acts to promote development of the prethalamus. We asked if zic2a interacts with hedgehog signaling in the context of forebrain development in zebrafish. Our data show that hedgehog signaling and zic2a function at different times, and therefore act in parallel pathways during forebrain development. Taken together, our results identify Zic2a as a novel regulator of prethalamic development, and show that it functions independently of hedgehog signaling. (c) 2008 Elsevier Inc. All rights reserved.

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