期刊
DEVELOPMENT
卷 147, 期 21, 页码 -出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/dev.187047
关键词
Coloboma; Choroid fissure; Mitt Neural crest; Zebrafish
资金
- National Institutes of Health (NIH) [NIH R01EY18005, T32-EY17271, UL1TR00058]
- AD Williams' Fund of Virginia Commonwealth University
- National Institutes of Health Core Grant [P30 EY08098]
- Eye and Ear Foundation of Pittsburgh
- Research to Prevent Blindness
A crucial step in eye development is the closure of the choroid fissure (CF), a transient structure in the ventral optic cup through which vasculature enters the eye and ganglion cell axons exit. Although many factors have been identified that function during CF closure, the molecular and cellular mechanisms mediating this process remain poorly understood. Failure of CF closure results in colobomas. Recently, MITF was shown to be mutated in a subset of individuals with colobomas, but how MITF functions during CF closure is unknown. To address this issue, zebrafish with mutations in mitfa and tfec, two members of the Miff family of transcription factors, were analyzed and their functions during CF closure determined. mitfa;tfec mutants possess severe colobomas and our data demonstrate that Miff activity is required within cranial neural crest cells (cNCCs) during CF closure. In the absence of Miff function, cNCC migration and localization in the optic cup are perturbed. These data shed light on the cellular mechanisms underlying colobomas in individuals with MITF mutations and identify a novel role for Miff function in cNCCs during CF closure.
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