TY - JOUR AB - Icariside II (ICAII) is a bioflavonoid compound which has demonstrated anti‑oxidative, anti‑inflammatory and anti‑apoptotic biological activities. However, to the best of our knowledge, whether ICAII can alleviate myocardial ischemia and reperfusion injury (MIRI) remains unknown. The aim of the present study was to determine whether ICAII exerted a protective effect on MIRI and to investigate the potential underlying mechanism of action. A rat MIRI model was established by ligation of the left anterior descending coronary artery for 30 min, followed by a 24 h reperfusion. Pretreatment with ICAII with or without a PI3K/AKT inhibitor was administered at the beginning of reperfusion. Morphological and histological analyses were detected using hematoxylin and eosin staining; the infarct size was measured using Evans blue and 2,3,5‑triphenyltetrazolium chloride staining; and plasma levels of lactate dehydrogenase (LDH) and creatine kinase‑myocardial band (CK‑MB) were analyzed using commercialized assay kits. In addition, the cardiac function was evaluated by echocardiography and the levels of cardiomyocyte apoptosis were determined using a TUNEL staining. The protein expression levels of Bax, Bcl‑2, cleaved caspase‑3, interleukin‑6, tumor necrosis factor‑α, PI3K, phosphorylated (p)‑PI3K, AKT and p‑AKT were analyzed using western blotting analysis. ICAII significantly reduced the infarct size, decreased the release of LDH and CK‑MB and improved the cardiac function induced by IR injury. Moreover, ICAII pretreatment significantly inhibited myocardial apoptosis and the inflammatory response. ICAII also upregulated the expression levels of p‑PI3K and p‑AKT. However, the protective effects of ICAII were abolished by an inhibitor (LY294002) of the PI3K/AKT signaling pathway. In conclusion, the findings of the present study suggested that ICAII may mitigate MIRI by activating the PI3K/AKT signaling pathway. AD - Department of Cardiothoracic, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434023, P.R. China Department of Oncology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434023, P.R. China Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China AU - Guan,Bing‑Feng AU - Dai,Xiao‑Feng AU - Huang,Qi‑Bin AU - Zhao,Di AU - Shi,Jin‑Long AU - Chen,Cheng AU - Zhu,Yan AU - Ai,Fen DA - 2020/10/01 DO - 10.3892/mmr.2020.11396 EP - 3160 IS - 4 JO - Mol Med Rep KW - icariside II MIRI PI3K AKT PY - 2020 SN - 1791-2997 1791-3004 SP - 3151 ST - Icariside II ameliorates myocardial ischemia and reperfusion injury by attenuating inflammation and apoptosis through the regulation of the PI3K/AKT signaling pathway T2 - Molecular Medicine Reports TI - Icariside II ameliorates myocardial ischemia and reperfusion injury by attenuating inflammation and apoptosis through the regulation of the PI3K/AKT signaling pathway UR - https://doi.org/10.3892/mmr.2020.11396 VL - 22 ER -