Exogenous hydrogen sulfide protects against high glucose‑induced inflammation and cytotoxicity in H9c2 cardiac cells

Huang,Zena; Dong,Xiaobian; Zhuang,Xiaodong; Hu,Xun; Wang,Lichun; Liao,Xinxue

doi:10.3892/mmr.2016.5846

Exogenous hydrogen sulfide protects against high glucose‑induced inflammation and cytotoxicity in H9c2 cardiac cells

Authors:
- Zena Huang
- Xiaobian Dong
- Xiaodong Zhuang
- Xun Hu
- Lichun Wang
- Xinxue Liao
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Affiliations: Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
Published online on: October 13, 2016 https://doi.org/10.3892/mmr.2016.5846
Pages: 4911-4917

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Abstract

Hyperglycemia serves an important role in the pathogenesis of diabetic cardiomyopathy. The aim of the present study was to investigate whether exogenous hydrogen sulfide (H2S) protects against high glucose‑induced inflammation and cytotoxicity in cardiac cells by inhibiting the p38 mitogen‑activated protein kinase (MAPK)/nuclear factor‑κB (NF‑κB), cyclooxygenase‑2 (COX‑2) and inducible nitric oxide synthase (iNOS) signaling pathways. Rat H9c2 myocardium cells were exposed to 33 mM glucose (high glucose, HG) for 24 h to stimulate HG‑induced cytotoxicity. One group of cells was pretreated with NaHS (a donor of H2S) prior to HG exposure, and cell viability was determined using the Cell Counting Kit‑8 assay. The protein expression levels of p38MAPK, the phosphorylated p65 subunit of NF‑κB, iNOS, COX‑2 and caspase‑3 were analyzed by western blotting, and the protein expression levels of interleukin (IL)‑1β and IL‑6 were detected by enzyme‑linked immunosorbent assay (ELISA). Pretreatment of H9c2 cells with NaHS for 30 min prior to exposure to HG significantly ameliorated the expression of p38MAPK and NF‑κB. In addition, pretreatment with NaHS markedly attenuated p38MAPK/NF‑κB‑mediated cytotoxicity and inflammation, as evidenced by the significant increase in cell viability and decrease in iNOS, COX‑2, IL‑1β and IL‑6 expression levels. Furthermore, treatment of cells with NaHS significantly decreased the expression of caspase‑3, which suggested that NaHS attenuated HG‑induced apoptosis. In conclusion, the results of the present study provided evidence to suggest that exogenous H2S protects against HG‑induced cytotoxicity and inflammation in H9c2 cardiac cells. H2S may exert these cytoprotective effects via inhibition of the p38MAPK/NF‑κB, COX‑2 and iNOS signaling pathways.

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