Transcriptome analysis of the planarian eye identifies ovo as a specific regulator of eye regeneration.

Transcriptome analysis of the planarian eye identifies ovo as a specific regulator of eye regeneration.
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DOI:
10.1016/j.celrep.2012.06.018
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发表时间:
2012-08-30
期刊:
影响因子:
8.8
通讯作者:
Reddien PW
Reddien PW
中科院分区:
生物学1区
文献类型:
--
作者:
Lapan SW;Reddien PW

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在数百万种具有视觉系统的无脊椎动物中,眼睛发育和功能的遗传基础仅在果蝇中得到充分理解。我们描述了一个眼睛转录组的涡虫Schmidtea mediterranea。Planarian光感受器表达果蝇和脊椎动物中光转导和微绒毛结构所需的基因的直系同源物,并且视色素细胞表达与脊椎动物视网膜色素上皮中活跃的那些类似的溶质转运蛋白和黑色素合成酶。几种Planarian眼基因的直系同源基因,例如bestrophin-1和Usher综合征基因,在受到干扰时会导致哺乳动物的眼睛缺陷,并且之前没有描述过在无脊椎动物眼睛中发挥作用。五个以前未描述的涡虫眼睛转录因子所需的头部再生过程中正常的眼睛形成。特别是,一个保守的,转录因子编码卵基因表达的眼睛再生的最早阶段,是所需的所有类型的眼睛细胞的再生。
Among the millions of invertebrate species with visual systems, the genetic basis of eye development and function is well understood only in Drosophila melanogaster. We describe an eye transcriptome for the planarian Schmidtea mediterranea. Planarian photoreceptors expressed orthologs of genes required for phototransduction and microvillus structure in Drosophila and vertebrates, and optic pigment cells expressed solute transporters and melanin synthesis enzymes similar to those active in the vertebrate retinal pigment epithelium. Orthologs of several planarian eye genes, such as bestrophin-1 and Usher syndrome genes, cause eye defects in mammals when perturbed and were not previously described to have roles in invertebrate eyes. Five previously undescribed planarian eye transcription factors were required for normal eye formation during head regeneration. In particular, a conserved, transcription factor-encoding ovo gene was expressed from the earliest stages of eye regeneration and was required for regeneration of all cell types of the eye.
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