The PI3K pathway balances self-renewal and differentiation of Nephron Progenitor Cells through β-catenin signaling

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Abstract

Nephron progenitor cells differentiate to form nephrons during embryonic kidney development. In contrast, self-renewal maintains progenitor numbers and premature depletion leads to impaired kidney function. Here we analyze the PI3K pathway as a point of convergence for the multiple pathways that are known to control self-renewal in the kidney.We demonstrate that a reduction in PI3K signaling triggers premature differentiation of the progenitors and activates a differentiation program that precedes the mesenchymal-to-epithelial transition through ectopic activation of the b-catenin pathway. Therefore, the combined output of PI3K and other pathways fine-tunes the balance between self-renewal and differentiation in nephron progenitors.

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Lindström, N. O., Carragher, N. O., & Hohenstein, P. (2015). The PI3K pathway balances self-renewal and differentiation of Nephron Progenitor Cells through β-catenin signaling. Stem Cell Reports, 4(4), 551–560. https://doi.org/10.1016/j.stemcr.2015.01.021

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