4.7 Article

Activation of Renal (Pro)Renin Receptor Contributes to High Fructose-Induced Salt Sensitivity

期刊

HYPERTENSION
卷 69, 期 2, 页码 339-+

出版社

LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/HYPERTENSIONAHA.116.08240

关键词

fructose diet; hypertension; renin-angiotensin system; uric acid

资金

  1. National Natural Science Foundation of China [81630013, 91439205, 31330037]
  2. Beijing Novo Nordisk Pharmaceuticals Science & Technology Co. Ltd
  3. National Basic Research Program of China 973 Program [2012CB517600, 2012CB517602]
  4. VA Merit Review
  5. National Institutes of Health [DK094956, DK104072]

向作者/读者索取更多资源

A high-fructose diet is shown to induce salt-sensitive hypertension, but the underlying mechanism largely remains unknown. The major goal of the present study was to test the role of renal (pro) renin receptor (PRR) in this model. In Sprague-Dawley rats, high-fructose intake increased renal expression of full-length PRR, which were attenuated by allopurinol. High-fructose intake also upregulated renal mRNA and protein expression of sodium/hydrogen exchanger 3 and Na/K/2Cl cotransporter, as well as in vivo Na/K/2Cl cotransporter activity, all of which were nearly completely blocked by a PRR decoy inhibitor PRO20 or allopurinol treatment. Parallel changes were observed for indices of intrarenal renin-angiotensin-system including renal and urinary renin and angiotensin II levels. Radiotelemetry demonstrated that high-fructose or a high-salt diet alone did not affect mean arterial pressure, but the combination of the 2 maneuvers induced a approximate to 10-mm Hg increase of mean arterial pressure, which was blunted by PRO20 or allopurinol treatment. In cultured human kidney 2 cells, both fructose and uric acid increased protein expression of soluble PRR in a time-and dose-dependent manner; fructose-induced PRR upregulation was inhibited by allopurinol. Taken together, our data suggest that fructose via uric acid stimulates renal expression of PRR/soluble PRR that stimulate sodium/hydrogen exchanger 3 and Na/K/2Cl cotransporter expression and intrarenal renin-angiotensin system to induce salt-sensitive hypertension. Online Data Supplement

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