耳甲电针对冷应激大鼠脂蛋白代谢的调节作用

ObjectiveTo explore whether auricular concha eletroacupuncture (ACEA) is effective in regulating lipid-lipoprotein metabolism in rats submitted to cold stress.MethodsThirty-six adult male Sprague–Dawley rats were placed in four groups(9 rats in each group), the rats in three groups of which were submitted to cold stress for fourteen days, the last one of which was a control group. After the cold stress process, in those three groups, the rats of one group were with no treatment (stress only), two were treated with either ACEA or auricular margin eletroacupuncture (AMEA) repeated for fourteen days. On the 14th day, all the rats were sacrificed after all experimental procedure for blood sampling. Blood glucose, triglycerides (TG), total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) levels were tested by using the collected serum. Plasma lecithin-cholesterol acyltransferase (LCAT) was measured with ELISA kit.ResultsACEA down-regulated the TG level (P < 0.05) and LDL-C level (P < 0.05), and up-regulated HDL-C level (P < 0.05) and LACT level (P < 0.05). AMEA did not regulate the bio-markers.ConclusionACEA played an important role in regulating lipid-lipoprotein metabolism in rats submitted to cold stress.     

经穴注射BMSCs联合中药对糖尿病大鼠缺血后肢毛细血管密度的影响

目的:观察经穴注射骨髓间充质干细胞(BMSCs)联合益气活血中药对糖尿病(DM)大鼠缺血后肢骨骼肌毛细血管密度及小动脉密度的影响。方法:80只SD大鼠按1∶7比例随机分为2组:正常假手术组10只,其余70只一次性腹腔注射链脲佐菌素(STZ,50.0 mg/kg)制成DM大鼠模型,再等比例随机分为7组,即DM假手术组、DM缺血组、中药组(益气活血中药灌胃)、局部注射组(局部注射BMSCs)、局部注射+中药组(局部注射BMSCs配合益气活血中药灌胃)、穴位注射组(穴位注射BMSCs)、穴位注射+中药组(穴位注射BMSCs配合益气活血中药灌胃),每组10只。局部注射组、局部注射+中药组取缺血组织与正常组织交界处等距离选取5个点为注射部位注射BMSCs,注射量及浓度同穴位注射组。穴位注射:穴取"三阴交""照海""环跳""后三里""阳陵泉",每只大鼠共注射100μL浓度为1×107/m L的BMSCs,每处注射20μL。灌胃中药为煎煮浓缩成含生药1.5 kg/L的益气活血中药(生黄芪120 g、党参120 g、炙甘草48 g、当归120 g、鸡血藤120 g、川牛膝48 g)。非中药组蒸馏水灌胃。应用免疫组织化学SP二步法检测大鼠骨骼肌中α-平滑肌肌动蛋白(α-actin)、血小板内皮细胞黏附分子CD31、血管性血友病因子(v WF)的表达。结果:干预结束后21 d,各组内术侧较健侧后肢α-actin、CD31(除中药组外)表达均有所升高(P0.05,P0.01);中药组、局部注射组、局部注射+中药组、穴位注射+中药组术侧与健侧比较,v WF表达均降低(P0.05,P0.01)。术侧组间比较,穴位注射+中药组与正常假手术组、DM假手术组、DM缺血组、局部注射组比较,骨骼肌中α-actin表达明显升高(P0.05,P0.01);穴位注射组、穴位注射+中药组、局部注射+中药组大鼠后肢骨骼肌CD31表达与正常假手术组、DM假手术组、DM缺血组比较明显升高(P0.05,P0.01);穴位注射+中药组较中药组和局部注射组CD31表达升高(均P0.05);局部注射+中药注射组、穴位注射组、穴位注射+中药组与DM假手术组、DM缺血组比较,v WF表达降低(P0.05,P0.01)。结论:缺血可促进血管密度相关因子α-actin、CD31表达,但若给予穴位注射BMSCs或益气活血中药、特别是穴位注射BMSCs结合益气活血中药干预可明显促进血管密度相关因子α-actin、CD31的表达,抑制v WF的表达。说明穴位注射BMSCs结合益气活血中药可促进缺血组织血管新生,对改善组织缺血有促进作用。     

抑郁与慢性疼痛共病动物模型的研究进展

抑郁与疼痛是严重困扰人类的两大类疾病,临床上抑郁和慢性疼痛常常相伴随发生,两者存在复杂的相互促进关系,抑郁与慢性疼痛共病造成了巨大的社会和经济负担。动物模型是研究疾病发病机制与验证干预有效性的前提和基础,本文就目前常用且得到广泛认同的抑郁与慢性疼痛共病的动物模型进行分析总结,以期为今后的抑郁与慢性疼痛共病的实验研究提供参考。     

耳甲电针对抑郁模型大鼠海马Raf/ERK/RSK/CREB信号通路的影响

目的:观察耳甲电针对慢性不可预知性温和刺激(CUMS)诱导的抑郁大鼠海马细胞外信号调节激酶(ERK)信号转导通路的影响,探讨耳甲电针抗抑郁效应的机制。方法:SD大鼠随机分为空白组、模型组、耳甲电针组、PD98059抑制剂(PD)组、二甲基亚砜(DMSO)组、PD+耳甲电针组,每组10只。采用孤养结合连续21 d CUMS方法制备抑郁大鼠模型。耳甲电针组、PD+耳甲电针组于耳甲区的"心"和"神门"耳穴给予连续28 d电针刺激,每天30 min;PD组、DMSO组、PD+耳甲电针组分别给予连续28 d侧脑室注射PD98059、DMSO、PD98059,每只5μL/d。记录造模前后、干预后各组大鼠糖水消耗量。采用Western blot法检测干预后各组大鼠海马Raf、p-Raf、ERK、p-ERK、RSK、CREB、p-CREB蛋白的相对表达量。结果:与空白组比较,模型组大鼠糖水消耗量及海马Raf、p-Raf、ERK、p-ERK、RSK、CREB、p-CREB均显著降低(P<0. 01)。与模型组比较,耳甲电针组大鼠糖水消耗量及海马Raf、p-Raf、ERK、p-ERK、RSK、CREB、pCREB均显著升高(P<0. 05,P<0. 01),PD+耳甲电针组p-Raf、ERK、CREB明显升高(P<0. 01,P<0. 05),PD组p-ERK明显下降(P<0. 05)。与耳甲电针组比较,PD+耳甲电针组p-ERK、RSK和pCREB明显下降(P<0. 05,P<0. 01)。结论:海马内Raf/ERK/RSK/CREB信号通路可能参与了耳甲电针的抗抑郁效应,且该效应在一定程度上可被ERK阻断剂所抑制。