期刊
DEVELOPMENTAL DYNAMICS
卷 239, 期 2, 页码 639-650出版社
WILEY
DOI: 10.1002/dvdy.22187
关键词
cartilage; homeobox; Iroquois; pharyngeal arches; zebrafish
资金
- National Science Council, Taiwan [NSC95-2320-B040-040-MY2, NSC97-2320-13040-013-MY3, NSC96-2320-B-194-006-MY3]
Iroquois homeobox-like 1 (irxl1) is a novel member of the TALE superfamily of homeobox genes that is most closely related to the Iroquois class. We have identified the zebrafish irxl1 gene and characterized its structure. The protein contains a homeodomain that shares 100% sequence identity with other vertebrate orthologs. During embryogenesis, irxl1 is expressed from 18 hours postfertilization onward and prominent expression is detected in the pharyngeal arches. Knockdown of irxl1 by morpholinos results in malformed brain and arch structures, which can be partially rescued by cRNA injection. The heads of the morphants become small and flat, and extensions along the anterior-posterior/dorso-ventral axes are reduced without affecting regional specification. Loss of irxl1 function also causes deficit in neural crest cells which consequently results in partial loss of craniofacial muscles and severe deformation of arch cartilages. These observations suggest that irxl1 may regulate factors involved in brain and pharyngeal arch development. Developmental Dynamics 239:639-650, 2010. (C) 2009 Wiley-Liss, Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据