Lin28 and let-7 regulate the timing of cessation of murine nephrogenesis

Alena V. Yermalovich, Jihan K. Osborne, Patricia Sousa, Areum Han, Melissa A. Kinney, Michael J. Chen, Daisy A. Robinton, Helen Montie, Dan S. Pearson, Sean B. Wilson, Alexander N. Combes, Melissa H. Little () and George Q. Daley ()
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Alena V. Yermalovich: Children’s Hospital Boston
Jihan K. Osborne: Children’s Hospital Boston
Patricia Sousa: Children’s Hospital Boston
Areum Han: Children’s Hospital Boston
Melissa A. Kinney: Children’s Hospital Boston
Michael J. Chen: Children’s Hospital Boston
Daisy A. Robinton: Children’s Hospital Boston
Helen Montie: Children’s Hospital Boston
Dan S. Pearson: Children’s Hospital Boston
Sean B. Wilson: Royal Children’s Hospital
Alexander N. Combes: Royal Children’s Hospital
Melissa H. Little: Royal Children’s Hospital
George Q. Daley: Children’s Hospital Boston

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract In humans and in mice the formation of nephrons during embryonic development reaches completion near the end of gestation, after which no new nephrons are formed. The final nephron complement can vary 10-fold, with reduced nephron number predisposing individuals to hypertension, renal, and cardiovascular diseases in later life. While the heterochronic genes lin28 and let-7 are well-established regulators of developmental timing in invertebrates, their role in mammalian organogenesis is not fully understood. Here we report that the Lin28b/let-7 axis controls the duration of kidney development in mice. Suppression of let-7 miRNAs, directly or via the transient overexpression of LIN28B, can prolong nephrogenesis and enhance kidney function potentially via upregulation of the Igf2/H19 locus. In contrast, kidney-specific loss of Lin28b impairs renal development. Our study reveals mechanisms regulating persistence of nephrogenic mesenchyme and provides a rationale for therapies aimed at increasing nephron mass.

Date: 2019
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DOI: 10.1038/s41467-018-08127-4

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