Interleukin-1 Receptor Activation Potentiates Salt Reabsorption in Angiotensin II-Induced Hypertension via the NKCC2 Co-transporter in the Nephron.

Published

Journal Article

Hypertension is among the most prevalent and catastrophic chronic diseases worldwide. While the efficacy of renin angiotensin system (RAS) blockade in lowering blood pressure illustrates that the RAS is broadly activated in human hypertension, the frequent failure of RAS inhibition to prevent or reverse hypertensive organ damage highlights the need for novel therapies to combat RAS-dependent hypertension. We previously discovered elevated levels of the macrophage cytokine IL-1 in the kidney in a murine model of RAS-mediated hypertension. Here we report that IL-1 receptor (IL-1R1) deficiency or blockade limits blood pressure elevation in this model by mitigating sodium reabsorption via the NKCC2 co-transporter in the nephron. In this setting, IL-1R1 activation prevents intra-renal myeloid cells from maturing into Ly6C(+)Ly6G(-) macrophages that elaborate nitric oxide, a natriuretic hormone that suppresses NKCC2 activity. By revealing how the innate immune system regulates tubular sodium transport, these experiments should lead to new immunomodulatory anti-hypertensive therapies.

Full Text

Duke Authors

Cited Authors

  • Zhang, J; Rudemiller, NP; Patel, MB; Karlovich, NS; Wu, M; McDonough, AA; Griffiths, R; Sparks, MA; Jeffs, AD; Crowley, SD

Published Date

  • February 2016

Published In

Volume / Issue

  • 23 / 2

Start / End Page

  • 360 - 368

PubMed ID

  • 26712462

Pubmed Central ID

  • 26712462

Electronic International Standard Serial Number (EISSN)

  • 1932-7420

International Standard Serial Number (ISSN)

  • 1550-4131

Digital Object Identifier (DOI)

  • 10.1016/j.cmet.2015.11.013

Language

  • eng