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Anti-inflammatory Effect of Protocatechuic Aldehyde on Myocardial Ischemia/Reperfusion Injury In Vivo and In Vitro

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Abstract

Myocardial ischemia/reperfusion (MI/R) injury, in which inflammatory response plays a vital role, is frequently encountered in clinical practice. The present study was aimed to investigate the anti-inflammatory effect and the possible mechanism of protocatechuic aldehyde (PAl) on MI/R injury both in vivo and in vitro. The rat model of MI/R injury was induced by ligation of the left anterior descending coronary artery for 30 min, followed by 3-h reperfusion, and pretreatment with PAl could protect the heart from MI/R injury by reducing myocardial infarct size and the activities of creatine kinase-MB and cardiac troponin I (cTn-I) in serum. Also, PAl administration markedly reduced cellular injury induced by simulated ischemia/reperfusion (SI/R) in cultured neonatal rat cardiomyocytes, which was evidenced by increased cell viability, reduced lactate dehydrogenase and cTn-I activities in the culture medium, and greatly decreased percentage of cell apoptosis. Moreover, the levels of tumor necrosis factor-α, interleukin-6, intracellular adhesion molecule-1, phosphorylated IκB-α, and the nuclear translocation of nuclear factor-kappa B (NF-κB) were all evidently decreased by PAl both in vivo and in vitro. Taken together, these observations suggested that PAl could exert great protective effects against MI/R injury in rats and SI/R injury in cultured neonatal rat cardiomyocytes, and the cardioprotective mechanism might be involved in the suppression of inflammatory response via inhibiting the NF-κB signaling pathway.

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (ADW, no. 81173514), National Natural Science Foundation of China (MMX, no. 81001673), the “13115” Technology Innovation Project of Shaanxi Province (MMX, no. 2010ZDKG-62), Natural Science Foundation of Shaanxi Province (MMX, no. 2010JQ4018), Xijing Research Boosting Program (MMX, no. XJZT10D02), and Excellent Civil Service Training Fund of Forth Military Medical University (YG, no. 4138C4IDK6).

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The authors have no conflicting financial interests.

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Correspondence to Miaomiao Xi or Aidong Wen.

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Guo Wei, Yue Guan, Ying Yin, and Jialin Duan contributed equally to this work.

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Wei, G., Guan, Y., Yin, Y. et al. Anti-inflammatory Effect of Protocatechuic Aldehyde on Myocardial Ischemia/Reperfusion Injury In Vivo and In Vitro . Inflammation 36, 592–602 (2013). https://doi.org/10.1007/s10753-012-9581-z

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