标题：Quantitative Mitochondrial Proteomics Study on Protective Mechanism of Grape Seed Proanthocyanidin Extracts Against Ischemia/Reperfusion Heart Injury in Rat
作者：Lu Wei-da; Qiu Jie; Zhao Gai-xia; Qie Liang-yi; Wei Xin-bing; Gao Hai-qing
作者机构：[Lu, W.-D] Key Laboratory of Cardiovascular Proteomics of Shandong Province, Department of Geriatrics, Qilu Hospital of Shandong University, Jinan 250 更多
通讯作者地址：[Gao, HQ]Shandong Univ, Qilu Hosp, Dept Geriatr, Key Lab Cardiovasc Prote Shandong Prov, Jinan 250012, Peoples R China.
关键词：Grape seed proanthocyanidin extracts(GSPE);Ischemia-reperfusion heart injury;In vivo rat model;Mitochondria proteomics;Energy metabolism
摘要：Cardiac ischemia/reperfusion(I/R) injury is a critical condition, often associated with high morbidity and mortality. The cardioprotective effect of grape seed proanthocyanidin extracts(GSPE) against oxidant injury during I/R has been described in previous studies. However, the underlying molecular mechanisms have not been fully elucidated. This study investigated the effect of GSPE on reperfusion arrhythmias especially ventricular tachycardia(VT) and ventricular fibrillation(VF), the lactic acid accumulation and the ultrastructure of ischemic cardiomyocytes as well as the global changes of mitochondria proteins in in vivo rat heart model against I/R injury. GSPE significantly reduced the incidence of VF and VT, lessened the lactic acid accumulation and attenuated the ultrastructure damage. Twenty differential proteins related to cardiac protection were revealed by isobaric tag for relative and absolute quantitation(iTRAQ) profiling. These proteins were mainly involved in energy metabolism. Besides, monoamine oxidase A(MAOA) was also identified. The differential expression of several proteins was validated by Western blot. Our study offered important information on the mechanism of GSPE treatment in ischemic heart disease.