Dkk2 plays an essential role in the corneal fate of the ocular surface epithelium

  • Mukhopadhyay M
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Abstract

The Dkk family of secreted cysteine-rich proteins regulates Wnt/β-catenin signaling by interacting with the Wnt co-receptor Lrp5/6. Here, we show that Dkk2-mediated repression of the Wnt/β-catenin pathway is essential to promote differentiation of the corneal epithelial progenitor cells into a non-keratinizing stratified epithelium. Complete transformation of the corneal epithelium into a stratified epithelium that expresses epidermal-specific differentiation markers and develops appendages such as hair follicles is achieved in the absence of the Dkk2 gene function. We show that Dkk2 is a key regulator of the corneal versus epidermal fate of the ocular surface epithelium.

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Authors

  • M. Mukhopadhyay

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