Ashique Amir M, May Scott R, Kane Maureen A, Folias Alexandra E, Phamluong Khanhky, Choe Youngshik, Napoli Joseph L, Peterson Andrew S
Genesis. 2012 May;50(5):415-23. doi: 10.1002/dvg.22002. Epub 2012 Jan 25.
Retinoic acid (RA) signaling is necessary for proper patterning and morphogenesis during embryonic development. Tissue-specific RA signaling requires precise spatial and temporal synthesis of RA from retinal by retinaldehyde dehydrogenases (Raldh) and the conversion of retinol to retinal by retinol dehydrogenases (Rdh) of the short-chain dehydrogenase/reducatase gene family (SDR). The SDR, retinol dehydrogenase 10 (RDH10), is a major contributor to retinal biosynthesis during mid-gestation. We have identified a missense mutation in the Rdh10 gene (Rdh10(m366Asp) ) using an N-ethyl-N-nitrosourea-induced forward genetic screen that result in reduced RA levels and signaling during embryonic development. Rdh10(m366Asp) mutant embryos have unique phenotypes, such as edema, a massive midline facial cleft, and neurogenesis defects in the forebrain, that will allow the identification of novel RA functions.
视黄酸(RA)信号传导对于胚胎发育过程中的正确模式形成和形态发生是必需的。组织特异性RA信号传导需要视网膜醛脱氢酶(Raldh)从视黄醛精确地在空间和时间上合成RA,以及短链脱氢酶/还原酶基因家族(SDR)的视黄醇脱氢酶(Rdh)将视黄醇转化为视黄醛。SDR中的视黄醇脱氢酶10(RDH10)是妊娠中期视黄醛生物合成的主要贡献者。我们通过N-乙基-N-亚硝基脲诱导的正向遗传筛选,在Rdh10基因中鉴定出一个错义突变(Rdh10(m366Asp)),该突变导致胚胎发育过程中RA水平和信号传导降低。Rdh10(m366Asp)突变胚胎具有独特的表型,如水肿、巨大的中线面部裂隙和前脑神经发生缺陷,这将有助于鉴定新的RA功能。