RhoBTB1 protects against hypertension and arterial stiffness by restraining phosphodiesterase 5 activity.

Autor:	Mukohda M; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Fang S; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA.; Department of Physiology, Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin, USA., Wu J; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA.; Department of Physiology, Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin, USA., Agbor LN; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Nair AR; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Ibeawuchi SC; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Hu C; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Liu X; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Lu KT; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA.; Department of Physiology, Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin, USA., Guo DF; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Davis DR; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Keen HL; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Quelle FW; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA., Sigmund CD; Department of Pharmacology, UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA.; Department of Physiology, Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
Jazyk:	angličtina
Zdroj:	The Journal of clinical investigation [J Clin Invest] 2019 Mar 21; Vol. 129 (6), pp. 2318-2332. Date of Electronic Publication: 2019 Mar 21.
DOI:	10.1172/JCI123462
Abstrakt:	Mice selectively expressing PPARγ dominant negative mutation in vascular smooth muscle exhibit RhoBTB1-deficiency and hypertension. Our rationale was to employ genetic complementation to uncover the mechanism of action of RhoBTB1 in vascular smooth muscle. Inducible smooth muscle-specific restoration of RhoBTB1 fully corrected the hypertension and arterial stiffness by improving vasodilator function. Notably, the cardiovascular protection occurred despite preservation of increased agonist-mediated contraction and RhoA/Rho kinase activity, suggesting RhoBTB1 selectively controls vasodilation. RhoBTB1 augmented the cGMP response to nitric oxide by restraining the activity of phosphodiesterase 5 (PDE5) by acting as a substrate adaptor delivering PDE5 to the Cullin-3 E3 Ring ubiquitin ligase complex for ubiquitination inhibiting PDE5. Angiotensin-II infusion also caused RhoBTB1-deficiency and hypertension which was prevented by smooth muscle specific RhoBTB1 restoration. We conclude that RhoBTB1 protected from hypertension, vascular smooth muscle dysfunction, and arterial stiffness in at least two models of hypertension.
Databáze:	MEDLINE
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