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Development. 2017 Sep 1;144(17):3080-3094. doi: 10.1242/dev.148692. Epub 2017 Jul 31.

A Sall1-NuRD interaction regulates multipotent nephron progenitors and is required for loop of Henle formation.

Author information

1
Department of Internal Medicine, Saint Louis University, St Louis, MO 63104, USA.
2
Department of Biochemistry and Molecular Biology, Saint Louis University, St Louis, MO 63104, USA.
3
Department of Pathology, Saint Louis University, St Louis, MO 63104, USA.
4
Department of Internal Medicine, Saint Louis University, St Louis, MO 63104, USA michael.rauchman@health.slu.edu.
5
VA Saint Louis Health Care System, John Cochran Division, St Louis, MO 63106, USA.

Abstract

The formation of the proper number of nephrons requires a tightly regulated balance between renal progenitor cell self-renewal and differentiation. The molecular pathways that regulate the transition from renal progenitor to renal vesicle are not well understood. Here, we show that Sall1interacts with the nucleosome remodeling and deacetylase complex (NuRD) to inhibit premature differentiation of nephron progenitor cells. Disruption of Sall1-NuRD in vivo in knock-in mice (ΔSRM) resulted in accelerated differentiation of nephron progenitors and bilateral renal hypoplasia. Transcriptional profiling of mutant kidneys revealed a striking pattern in which genes of the glomerular and proximal tubule lineages were either unchanged or upregulated, and those in the loop of Henle and distal tubule lineages were downregulated. These global changes in gene expression were accompanied by a significant decrease in THP-, NKCC2- and AQP1-positive loop of Henle nephron segments in mutant ΔSRM kidneys. These findings highlight an important function of Sall1-NuRD interaction in the regulation of Six2-positive multipotent renal progenitor cells and formation of the loop of Henle.

KEYWORDS:

Lgr5; Loop of Henle; Nephron progenitor; NuRD; Sall1

PMID:
28760814
PMCID:
PMC5611954
DOI:
10.1242/dev.148692
[Indexed for MEDLINE]
Free PMC Article

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