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Article

C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury

  • Authors:
    • Jinrong Fu
    • Furong Guo
    • Cheng Chen
    • Xiaoman Yu
    • Ke Hu
    • Mingjiang Li
  • View Affiliations / Copyright

    Affiliations: Department of Cardiology, Renmin Hospital, Wuhan University, Wuhan, Hubei 430000, P.R. China, Department of Urology, Renmin Hospital, Wuhan University, Wuhan, Hubei 430000, P.R. China, Department of Respiratory Medicine, Renmin Hospital, Wuhan University, Wuhan, Hubei 430000, P.R. China
  • Pages: 2208-2214
    |
    Published online on: August 12, 2016
       https://doi.org/10.3892/etm.2016.3592
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Abstract

The optimal treatment for chronic intermittent hypoxia (CIH)-induced cardiovascular injuries has yet to be determined. The aim of the current study was to explore the potential protective effect and mechanism of a C1 inhibitor in CIH in the myocardium. The present study used a rat model of CIH in which complement regulatory protein, known as C1 inhibitor (C1INH), was administered to the rats in the intervention groups. Cardiomyocyte apoptosis was detected by terminal deoxynucleotidyl transferase‑mediated dUTP nick end labeling. The expression of proteins associated with the apoptotic pathway, such as B‑cell lymphoma 2 (Bcl‑2), Bax and caspase‑3 were detected by western blot analysis. The expression of complement C3 protein and RNA were also analyzed. C1INH was observed to improve the cardiac function in rats with CIH. Myocardial myeloperoxidase activity, a marker of neutrophil infiltration, was significantly decreased in the C1INH intervention group compared with the CIH control group, and cardiomyocyte apoptosis was significantly attenuated (P<0.05). Western blotting and reverse transcription‑polymerase chain reaction analysis indicated that the protein expression levels of Bcl-2 were decreased and those of Bax were increased in the CIH group compared with the normal control group, but the protein expression levels of Bcl-2 were increased and those of Bax were decreased in the C1INH intervention group, as compared with the CIH group. Furthermore, the CIH‑induced expression and synthesis of complement C3 in the myocardium were also reduced in the C1INH intervention group. C1INH, in addition to inhibiting complement activation and inflammation, preserved cardiac function in CIH‑mediated myocardial cell injury through an anti‑apoptotic mechanism.
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Copy and paste a formatted citation
Spandidos Publications style
Fu J, Guo F, Chen C, Yu X, Hu K and Li M: C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury. Exp Ther Med 12: 2208-2214, 2016.
APA
Fu, J., Guo, F., Chen, C., Yu, X., Hu, K., & Li, M. (2016). C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury. Experimental and Therapeutic Medicine, 12, 2208-2214. https://doi.org/10.3892/etm.2016.3592
MLA
Fu, J., Guo, F., Chen, C., Yu, X., Hu, K., Li, M."C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury". Experimental and Therapeutic Medicine 12.4 (2016): 2208-2214.
Chicago
Fu, J., Guo, F., Chen, C., Yu, X., Hu, K., Li, M."C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury". Experimental and Therapeutic Medicine 12, no. 4 (2016): 2208-2214. https://doi.org/10.3892/etm.2016.3592
Copy and paste a formatted citation
x
Spandidos Publications style
Fu J, Guo F, Chen C, Yu X, Hu K and Li M: C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury. Exp Ther Med 12: 2208-2214, 2016.
APA
Fu, J., Guo, F., Chen, C., Yu, X., Hu, K., & Li, M. (2016). C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury. Experimental and Therapeutic Medicine, 12, 2208-2214. https://doi.org/10.3892/etm.2016.3592
MLA
Fu, J., Guo, F., Chen, C., Yu, X., Hu, K., Li, M."C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury". Experimental and Therapeutic Medicine 12.4 (2016): 2208-2214.
Chicago
Fu, J., Guo, F., Chen, C., Yu, X., Hu, K., Li, M."C1 inhibitor‑mediated myocardial protection from chronic intermittent hypoxia‑induced injury". Experimental and Therapeutic Medicine 12, no. 4 (2016): 2208-2214. https://doi.org/10.3892/etm.2016.3592
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