Abstract

During vertebrate development, the formation of the central nervous system (CNS) is initiated by neural induction and patterning of the embryonic ectoderm. We previously reported that Cdc2-like kinase 2 (Clk2) promotes neural development in Xenopus embryos by regulating morphogen signaling. However, the functions of other Clk family members and their roles in early embryonic development remain unknown. Here, we show that in addition to Clk2, Clk1 and Clk3 play a role in the formation of neural tissue in Xenopus. clk1 and clk3 are co-expressed in the developing neural tissue during early Xenopus embryogenesis. We found that overexpression of clk1 and clk3 increases the expression of neural marker genes in ectodermal explants. Furthermore, knockdown experiments showed that clk3 is required for the formation of neural tissues. These results suggest that Xenopus Clk3 plays an essential role in promoting neural development during early embryogenesis.

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