电针足三里对脓毒症大鼠促炎症因子所致心肌损伤的保护作用

目的研究电针足三里穴（ST36）对脓毒症大鼠促炎症因子所致心肌损伤的保护作用。方法雄性SD大鼠32只,采用盲肠结扎穿孔术（CLP）制备大鼠脓毒症模型,随机分为电针（Electro-Acupuncture,EA）足三里组（EA组）、CLP＋假电针（ShameEA）组（SEA组）、迷走神经切断（Vagotomy,VA）＋CLP组（VA组）和迷切后CLP再电针组（VA/EA组）4组,每组8只。EA组持续针刺双侧足三里穴1h（2mA,2-100Hz）;SEA组采用相同频率和强度刺激非经非穴（足三里穴外侧旁开0.5cm）。VA组先切断腹腔迷走神经再施行CLP术。各组大鼠于CLP术后6h,取血检测血浆肌酸激酶同工酶（CK-MB）活性;然后处死动物,取心肌组织,测定肿瘤坏死因子-α（TNF-α）水平、一氧化氮（NO）含量、随过氧化物酶（MPO）活性以及组织含水率。结果CLP术后6h,EA组心肌组织促炎症因子TNF-α、NO、MPO水平、CK-MB活性以及组织含水率均显著低于其余3组（P〈0.05）;VA/EA组和VA组TNF-α、NO、MPO水平、CK-MB活性及组织含水率均高于SEA组（P〈0.05）;VA/EA组与VA组上述指标的差异无统计学意义（P〉0.05）。结论电针足三里穴能显著抑制脓毒症大鼠心肌促炎症因子水平,切断迷走神经能显著降低或消除EA的作用,其机制可能与兴奋胆碱能抗炎通路有关。

Protective effects of electro-acupunctu re at Zusanli point on myocardial injury induced by proinflammatory factors in rats

Objective To investigate the protective effects of electro-acupuncture (EA) at Zusanli point on myocardial injury induced by proinflammatory factors in rats. Methods Thirty-two male SD rats were selected to establish a sepsis model of rats by cecal ligation and puncture (CLP), and randomly divided into CLP+ EA group, CLP+ sham EA(SEA) group, vagotomy(VA)+CLP group, and VA+CLP+EA(VA/EA) group (n=8). EA was performed at bilateral Zusanli points (ST36) of rats in EA group with a constant voltage (2mA, 2-100Hz)...