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Journal of Chinese Pharmaceutical Sciences ›› 2015, Vol. 24 ›› Issue (12): 789-800.DOI: 10.5246/jcps.2015.12.101

• Original articles • Previous Articles     Next Articles

An Ac-SDKP analogue resistant to angiotensin converting enzyme exhibits anti-fibrosis effects and improves heart function in mice after myocardial infarction

Jianhui Chen1,2, Xiaowen Ma3, Zhao Zhang3, Yingqi Zhang3, Yuan Yuan2*, Meng Li3*   

  1. 1. The Ninety-first Central Hospital of the Chinese people’s liberation army, Jiaozuo 454003, China
    2. Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
    3. Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
  • Received:2015-06-16 Revised:2015-07-30 Online:2015-12-22 Published:2015-08-15
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  • Supported by:
    National Science and Technology Major Projects (Invention and Creation of New Drugs) of China 2011ZXJ09104-01B and Xijing project 9XJZT13M17.

Abstract:

To explore the effect of an Ac-SDKP analog on left ventricular remodeling after myocardial infarction, we synthesized the analog Ac-SDDKDP by replacing Asp and Lys with their D isomers. The biological activities of Ac-SDDKDP were confirmed using flow cytometry, qRT-PCR, Western blots and fluorescence microscopy. The protective effects of Ac-SDDKDP on infarcted hearts were assessed in mice with myocardial infarction (MI). The half-life of Ac-SDDKDP was prolonged to over 2 h from a few minutes that Ac-SDKP has. Compared with Ac-SDKP, the analog exhibited stronger inhibition on the differentiation of macrophages, expression of arginase I (ARG I) and TGF-β1 in mature macrophages, proliferation and secretion of collagen type I in cardiac fibroblasts. In MI mice mode, Ac-SDDKDP decreased collagen deposition and TGF-β1 expression in myocardium, thus improvingthe FS (%) to 23.0±7.8 compared with 11.2±6.2 in untreated mice and 11.7±5.3 in Ac-SDKP treated mice (P<0.05). This work shows that the Ac-SDKP analogue is potentially useful for protective treatment for heart failure post-MI. In addition, the anti-fibrosis mechanism of Ac-SDKP was correlated with the alternative activation (M2) of macrophages by assessing ARG I and TGF-β1, two important fibrosis-related molecules secreted in M2 macrophages.

Key words: Ac-SDKP, Analogue, Anti-fibrosis, Myocardial infarction, Heart failure

CLC Number: 

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