摘要目的 评价星状神经节阻滞对糖尿病大鼠细胞免疫功能的影响.方法 健康雄性SD大鼠,3月龄,体重240～ 280 g,采用腹腔注射1％链脲佐菌素60 mg/kg制备糖尿病模型.取糖尿病模型制备成功的大鼠48只,采用随机数字表法分为2组(n=24):糖尿病组(DM组)和星状神经节阻滞组(SGB组);另取健康同龄大鼠24只作为对照组(C组).SGB组于糖尿病模型制备成功1周后行右颈交感干离断术,C组和DM组仅分离右颈交感干.分别于颈交感干离断术前(T0)、术后1、3、7d(T13)时,随机取6只大鼠,采集下腔静脉血样,测定血糖浓度,采用ELISA法检测血浆去甲肾上腺素(NE)浓度,采用FACSCalibur流式细胞仪检测全血T淋巴细胞亚群CD3+、CD4+和CD8+的水平,计算CD4+/CD8+比值;处死前称重,解剖分离胸腺组织称重,计算胸腺指数(胸腺重量÷大鼠体重).结果 与C组比较,DM组和SGB组T0-3时血糖升高,全血CD3+和CD4+的水平、CD4+/CD8+比值和胸腺指数降低(P＜0.05),CD8+水平差异无统计学意义(P＞0.05),SGB组T1-3时血浆NE浓度降低(P＜0.05),DM组血浆NE浓度差异无统计学意义(P＞0.05);与DM组比较,SGB组T1-3时血糖及血浆NE浓度降低,全血CD3+和CD4+的水平、CD4+/CD8+比值和胸腺指数升高(P＜0.05),CD8+水平差异无统计学意义(P＞0.05).结论 星状神经节阻滞可改善糖尿病大鼠细胞免疫功能.

abstractsObjective To evaluate the effect of stellate ganglion block (SGB) on cellular immune function in diabetic rats.Methods Healthy male Sprague-Dawley rats,aged 3 months,weighing 240-280 g,were used in this study.Diabetes mellitus was induced by intraperitoneal 1％ streptozotocin 60 mg/kg and confirmed by blood glucose ≥ 16.7 mmol/L 3 days later.Forty-eight rats with diabetes mellitus were randomly divided into 2 groups (n=24 each) using a random number table:diabetes mellitus group (group DM) and group SGB.Another 24 healthy rats,aged 3 months,were selected and served as control group (group C).At 1 week after successful establishment of the model,unilateral transection of cervical sympathetic trunk (TCST) was performed in group SGB,while the right cervical sympathetic trunk was only exposed in C and DM groups.Before TCST (T0) and on 1,3,7 days after TCST (T1-3),6 rats were randomly selected from each group,and blood samples were collected from the inferior vena cava for determination of the blood glucose,plasma norepinephrine (NE) concentrations (by enzyme-linked immunosorbent assay),and levels of T lymphocyte subsets CD3+,CD4+ and CD8+ in whole blood (using FACSCalibur flow cytometer).C D4+/CD8+ratio was calculated.The rats were weighed before sacrifice,and the rats were sacrificed to obtain the thymus which was weighed.The thymus index (thymus weight/body weight) was calculated.Results Compared with group C,the blood glucose was significantly increased,and the levels of CD3+ and CD4+ in whole blood,CD4+/CD8+ ratio,and thymus index were significantly decreased at T0-3 (P＜0.05),and no significant change was found in CD8+ levels in DM and SGB groups (P＞0.05),the plasma NE concentrations were significantly decreased at T1-3 in group SGB (P＜0.05),and no significant change was found in plasma NE concentrations in group DM (P＞0.05).Compared with group DM,the blood glucose and plasma NE concentrations were significantly decreased,and the levels of CD3+ and CD4+ in whole blood,CD4+/CD8+ ratio,and thymus index were significantly increased at T1-3 (P＜0.05),and no significant change was found in CD8+ levels in group SGB (P＞0.05).Conclusion SGB can improve the cellular immune function in diabetic rats.