摘要:
AIM To explore the protective effects of Huoxue Kangnao Granules (Astragali Radix,Morindae officinalis Radix,Puerariae lobatae Radix,etc.) on cerebral ischemia-reperfusion injury in rats.METHODS The rat model for middle cerebral artery occlusion (MCAO) was established,SD rats were randomly divided into sham operation group,model group,positive control group,Huoxue Kangnao Granules low-,middle-and highdose groups.Nerve function score was tested.Volume of cerebral infarction was calculated by TTC staining.SOD,MDA,6-keto-PGF1α,TXB2,IL-1 β and TNF-α were detected by ELISA.The expression levels of MMP-9 and ICAM-1 were detected by RT-PCR.To observe the influence of Huoxue Kangnao Granules on platelet aggregative function,clotting time was analyzed by automatic blood coagulation analyzer,plasma T-PA and PAI activities were determined by ELISA,and hemorheology indices were detected by automatic biochemical analyzer.RESULTS Huoxue Kangnao Granules could significantly decrease cerebral infarction volume,improve nerve function,reduce MDA content,increase SOD activity;increase 6-keto-PGF1 α level,reduce TXB2 content;decrease TNF-α and IL-1β expressions;inhibit MMP-9 and ICAM-1 expressions;extend KPTT and PT;elevate t-PA activity,inhibit PAI activity;decrease whole blood viscosity,enhance erythrocyte deformation ability.Each dosage group of Huoxue Kangnao Granules had a positive correlation between dose and response.CONCLUSION Huoxue Kangnao Granules can protect cerebral ischemia-reperfusion injury in rats,whose mechanisms may be related to anti-free radical injury,anti-thrombus,anti-cerebral vasospasm,improving cerebrovascular permeability,anti-inflammatory,anti-coagulation and improving abnormal changes of hemorheology.%目的 探究活血康脑颗粒(黄芪、巴戟天、葛根等)对大鼠脑缺血再灌注损伤的保护作用.方法 建立大鼠大脑中动脉栓塞(MCAO)模型,SD大鼠随机分为假手术组,模型组,阳性对照组,活血康脑颗粒低、中、高剂量组.测试神经功能评分,TTC染色计算脑梗死体积,酶联免疫吸附(ELISA)法检测超氧化物歧化酶(SOD)、丙二醛(MDA)、6-酮-前列腺素(6-keto-PGF1α)、血栓素B2(TXB2)、白细胞介素-1β (IL-1β)、肿瘤坏死因子-α(TNF-α),逆转录-聚合酶链反应(RT-PCR)法检测基质金属蛋白酶9(MMP-9)、细胞间黏附分子-1(ICAM-1)表达水平.为了观察活血康脑颗粒对血小板聚集功能的影响,全自动血凝分析仪分析凝血时间,ELISA法测定血浆组织型纤溶酶原激活物(t-PA)和抑制物(PAI)活性,全自动生化分析仪检测血液流变学指标.结果 活血康脑颗粒能显著减少脑梗死体积,改善神经功能,降低MDA含有量,增加SOD活性;升高6-keto-PGF1α水平,降低TXB2含有量;减少IL-1β和TNF-α表达;抑制MMP-9、ICAM-1表达;延长白陶土部分凝血活酶时间(KPTT)、血浆凝血酶原时间(PT);升高t-PA活性,抑制PAI活性;降低全血黏度,提高红细胞变形能力.活血康脑颗粒每个剂量组的量效呈正相关.结论 活血康脑颗粒可保护大鼠脑缺血再灌注损伤,其机制可能与抗自由基损伤、抗血栓、抗脑血管痉挛、改善脑血管通透性、抗炎、抗凝血、改善血液流变学异常变化有关.