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The present study aimed to investigate the effect of hydrogen sulfide (H 2 S) on kidney injury induced by urinary-derived sepsis. Rabbits were randomly divided into control, sham, sepsis, NaHS 2.8 μmol/kg and NaHS 8.4 μmol/kg groups, with six rabbits in each group. Upper urinary tract obstruction and acute infection was induced to establish the sepsis model. Blood was collected to carry out a white blood cell (WBC) count, and creatinine (Cr) and blood urea nitrogen (BUN) analysis. Morphological changes were observed by hematoxylin and eosin (H&amp;E) staining and transmission electron microscopy. Immunohistochemical staining was used to detect the expression levels of tumor necrosis factor (TNF)-α, interleukin (IL)-10 and nuclear factor κ-light-chain-enhancer of activated B cells (NF-κB). Cystathionine-γ-lyase (CSE) activity was measured by the spectrophotometric methylene blue method and the blood H 2 S concentration was measured by deproteinization. WBC, Cr and BUN levels were significantly elevated in the sepsis group compared with those in the control group (P&lt;0.05). Following treatment with NaHS, the WBC, Cr and BUN levels were significantly decreased in the NaHS groups compared with those in the sepsis group (P&lt;0.05). The pathological features of kidney injury were also alleviated by NaHS. In the sepsis group, the levels of TNF-α, IL-10 and NF-κB were significantly increased compared with those in the control group (P&lt;0.05). In the NaHS groups, the TNF-α and NF-κB levels were significantly reduced whereas the IL-10 level was significantly increased compared with the respective levels in the sepsis group (P&lt;0.05). The H 2 S concentration was significantly decreased in the sepsis group and this reduction was attenuated in the NaHS groups (P&lt;0.05). Furthermore, the NaHS 8.4 μmol/kg dose revealed a more potent effect than the NaHS 2.8 μmol/kg dose. Thus, exogenous H 2 S reduced kidney injury from urinary-derived sepsis by decreasing the levels of NF-κB and TNF-α, and increasing the level of IL-10.

experimental and therapeutic medicine

Hydrogen sulfide reduces kidney injury due to urinary-derived sepsis by inhibiting NF-κB expression, decreasing TNF-α levels and increasing IL-10 levels