Distribution of hydrogen sulfide (H2S)-producing enzymes and the roles of the H2S donor sodium hydrosulfide in diabetic nephropathy

Junichiro Yamamoto, Waichi Sato, Tomoki Kosugi, Tokunori Yamamoto, Toshihide Kimura, Shigeki Taniguchi, Hiroshi Kojima, Shoichi Maruyama, Enyu Imai, Seiichi Matsuo, Yukio Yuzawa, Ichiro Niki

研究成果: ジャーナルへの寄稿学術論文査読

84 被引用数 (Scopus)

抄録

Background: Hydrogen sulfide (H2S) has recently been found to play beneficial roles in ameliorating several diseases, including hypertension, atherosclerosis and cardiac/renal ischemia-reperfusion injuries. Cystathionine β-synthase (CBS) and cystathionine γ-lyase (CSE), the main enzymes in the transsulfuration pathway, catalyze H2S production in mammalian tissues. However, the distributions and precise roles of these enzymes in the kidney have not yet been identified. Methods: The present study examined the localization of both enzymes in the normal kidney and the effect of the H 2S donor sodium hydrosulfide (NaHS) in the renal peritubular capillary (PTC) under conditions of diabetic nephropathy, using pancreatic β-cell-specific calmodulin-overexpressing transgenic mice as a model of diabetes. Results: In the normal kidney, we detected expression of both CBS and CSE in the brush border and cytoplasm of the proximal tubules, but not in the glomeruli, distal tubules and vascular endothelial cells of renal PTCs. Administration of NaHS increased PTC diameter and blood flow. We further evaluated whether biosynthesis of H2S was altered in a spontaneous diabetic model that developed renal lesions similar to human diabetic nephropathy. CSE expression was markedly reduced under diabetic conditions, whereas CBS expression was unaffected. Progressive diabetic nephropathy showed vasoconstriction and a loss of blood flow in PTCs that was ameliorated by NaHS treatment. Conclusion: These findings suggest that CSE expression in the proximal tubules may also regulate tubulointerstitial microcirculation via H2S production. H2S may represent a target of treatment to prevent progression of ischemic injury in diabetic nephropathy.

本文言語英語
ページ(範囲)32-40
ページ数9
ジャーナルClinical and Experimental Nephrology
17
1
DOI
出版ステータス出版済み - 02-2013

All Science Journal Classification (ASJC) codes

  • 生理学
  • 腎臓病学
  • 生理学(医学)

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