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Deleting the TGF-β receptor attenuates acute proximal tubule injury. | LitMetric

Deleting the TGF-β receptor attenuates acute proximal tubule injury.

J Am Soc Nephrol

Department of Research, Veterans Affairs Hospital, Tennessee Valley Healthcare System, Nashville, Tennessee, USA.

Published: December 2012

AI Article Synopsis

Article Abstract

TGF-β is a profibrotic growth factor in CKD, but its role in modulating the kidney's response to AKI is not well understood. The proximal tubule epithelial cell, which is the main cellular target of AKI, expresses high levels of both TGF-β and its receptors. To determine how TGF-β signaling in this tubular segment affects the response to AKI, we selectively deleted the TGF-β type II receptor in the proximal tubules of mice. This deletion attenuated renal impairment and reduced tubular apoptosis in mercuric chloride-induced injury. In vitro, deficiency of the TGF-β type II receptor protected proximal tubule epithelial cells from hydrogen peroxide-induced apoptosis, which was mediated in part by Smad-dependent signaling. Taken together, these results suggest that TGF-β signaling in the proximal tubule has a detrimental effect on the response to AKI as a result of its proapoptotic effects.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3507360PMC
http://dx.doi.org/10.1681/ASN.2012020139DOI Listing

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