Anterior segment dysgenesis in the eyes of mice deficient for the high-mobility-group transcription factor Sox11

Experimental Eye Research
Antje WurmErnst R Tamm

Abstract

We describe that Sox11, a member of the group C of the Sox transcription factor family, is critically required during the morphogenetic processes of early eye development, and that lack of Sox11 results in ocular anterior segment dysgenesis (ASD). Sox11-deficient mice show a persistent lens stalk, a delay in lens formation, and the phenotypes of Peters' anomaly and microphthalmia at birth. In addition, the optic fissure does not close in the anterior halves of the eyes resulting in anterior coloboma. The delay in lens formation is associated with a reduced mitotic activity in the lens placode during its invagination into the optic cup. No changes in Pax6 expression are observed in the developing eyes of Sox11-/- mice, whereas the expression of Sox11 is reduced in optic cup, optic vesicle and lens placode of Pax6+/- embryos and in the optic vesicle of Pax6-/- mice. Transfection experiments show an increase in Sox11 expression when higher doses of Pax6 are present. Considerably smaller amounts of BMP7 are expressed in lens and optic cup of Sox11-/- mice as compared to their wild-type littermates. We conclude that Sox11 is required during separation of the lens vesicle from the surface ectoderm and the closure of the anterior opti...Continue Reading

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Mar 22, 2013·PLoS Genetics·Ohad ShahamRuth Ashery-Padan
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