Sex differences in dietary sodium evoked NCC regulation and blood pressure in male and female Sprague-Dawley, Dahl salt-resistant, and Dahl salt-sensitive rats

Author:

Kim Kiyoung1,Nist Kayla M.2ORCID,Puleo Franco1,McKenna James3,Wainford Richard D.13ORCID

Affiliation:

1. Department of Pharmacology and Experimental Therapeutics, Whitaker Cardiovascular Institute, Boston University Chobanian and Avedisian School of Medicine, Boston, Massachusetts, United States

2. Department of Anatomy and Neurobiology, Boston University Chobanian and Avedisian School of Medicine, Boston, Massachusetts, United States

3. Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States

Abstract

NCC regulation is sex dependent. In normotensive male and female Sprague-Dawley and Dahl salt-resistant rats, which exhibit dietary Na+-evoked NCC suppression, male rats exhibit decreased WNK4 expression and decreased SPAK and OxSR1 levels, whereas female rats only suppress SPAK and OxSR1. In hypertensive Dahl salt-sensitive rats, the ability of females to suppress NCC (in opposition to males) via a SPAK/OxSR1 mechanism likely contributes to their lower magnitude of salt-sensitive hypertension.

Funder

HHS | NIH | National Institute on Aging

Hevolution Foundation

HHS | NIH | National Heart, Lung, and Blood Institute

Publisher

American Physiological Society

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