摘要
在培养大鼠心肌细胞的培养基中加入黄嘌呤及黄嘌呤氧化酶可使心肌细胞产生氧化损伤,表现为动作电位幅值(APA)、超射(OS)、最大舒张电位(MDP)、阈电位(TP)、最大除极速度(V_(max))减小,自发发放频率(SDF)增大.向培养基中加入200mg·L^(-1)黄芪多糖可阻止黄嘌呤及黄嘌呤氧化酶的氧化损伤作用.用黄嘌呤及黄嘌呤氧化酶造成Wistar大鼠自由基损伤,使离体心功能指标显著下降,100mg·kg^(-1)·d^(-1)黄芪多糖可使致损心脏的各项指标一致向正常方向转化.因此黄芪多糖对培养的心肌细胞和离体心脏均有抗自由基损伤作用.
Xanthine-Xanthine oxidase ( X-XOD) added to the culture medium of cultured cardiac cells in rats may damage cell membrane. Electrophysiological findings indicated that APA, MDP, OS,Vmax, were decreased and the SDF was increased. Astragalus polysaccharide (APS) could protect the cells from being damaged by X-XOD. APS recoverted all the de-creased cardiac functional parameters in free-radical-damaged rats by X-XOD. APS had anti-free-radical damage action on the cultured my-ocardiocytes and the myocardial contractility of the isolated rat working heart.
出处
《中国药理学通报》
CAS
CSCD
北大核心
1996年第2期161-163,共3页
Chinese Pharmacological Bulletin
关键词
黄芪多糖
心肌细胞
动作电位
自由基
黄芪
astragalus polysaccharide
my-ocardiocytes
action potencial
isolated working heart
free-radical
