丹参对非酒精性脂肪肝大鼠血清MDA、SOD、TNF、Leptin的影响

[目的]观察丹参对非酒精性脂肪肝大鼠血中丙二醛(MDA)、过氧化物歧化酶(SOD)、肿瘤坏死因子α(TNF-α)、瘦素(Leptin)的调节作用.[方法]59只大鼠随机分为5组,第1组为正常饮食对照组(正常组),11只,喂饲普通饲料;第2～5组为实验组,喂高脂饲料.其中第2组为高脂饮食组(模型组),16只;第3、4组为丹参注射液大、小剂量治疗组(治疗组),各11只;第5组为为还原型谷胱甘肽对照组(对照组),10只.治疗组大鼠每天丹参注射液3.3ml/kg、1.65ml/kg;对照组每天还原型谷胱甘肽溶液10ml/kg;正常组和模型组腹腔注射等量生理盐水,连续8W,观察肝组织的病理改变,比色法测定血清MDA、SOD,放免法测定血清中TNF-α、Leptin含量.[结果]模型组大鼠肝脏脂肪沉着面积,沉着程度及纤维化程度积分均较正常组明显增多,血清中MDA、TNF-α含量均较正常组明显升高(P＜0.01,P＜0.05),而SOD、Leptin含量较正常组明显减低(P＜0.05).丹参大剂量治疗组大鼠肝脏脂肪沉着面积积分较模型组明显减少(P＜0.05),血清中MDA含量较模型组明显降低(P＜0.05),Leptin含量较模型组明显升高(P＜0.05),而SOD、TNF-α的变化不明显(与模型组比P＞0.05).[结论]大剂量丹参可改善非酒精性脂肪肝大鼠肝脏脂肪变性情况,并能减少脂肪肝大鼠血中MDA含量,提高Leptin的表达.     

复方丹参滴丸对急性冠脉综合征患者QT离散度的影响

目的 观察复方丹参滴丸对急性冠脉综合征（Acs）患者QT离散度的影响。方法 71例ACS患者随机分成治疗组36例，对照组35例。2组均给予硝酸酯类、抗血小板、抗凝，有溶栓指征者给予尿激酶；治疗组在上述治疗的基础上给予复方丹参滴丸。2组均于治疗前及治疗1个月后测定QT离散度，观察两种治疗方法对QT离散度影响。结果 治疗前2组QT离散度无明显著异（P〉0．05）。治疗1个月后与治疗前相比，治疗组QT离散度显著下降（P〈0．05），而对照组QT离散度无明显变化（P〉0．05）；治疗后，治疗组较对照组QT离散度明显降低（P〈0．05）。结论 复方丹参滴丸使急性冠脉综合征患者的QT离散度显著缩小，能保护心肌，改善预后。     

大鼠鞘内哇巴因及混合替扎尼定治疗神经病理性疼痛

目的探讨大鼠鞘内畦巴因及混合替扎尼定对神经病理性疼痛的治疗效能。方法雄性SD大鼠250～300g,鞘内留置PE-10导管,1周后制作大鼠脊神经结扎神经病理性疼痛模型。将大鼠随机分组：对照组、哇巴因组、替扎尼定组、畦巴因和替扎尼定混合药物组、育亨宾或阿托品拮抗组,每组6只。测定各组鞘内给药前、给药后各时点的大鼠机械撤足阈值,计算对应时点的最大效应百分比（％MPE）,评价抗神经病理性疼痛效果。使用Isobologram分析评价药物的相互作用。结果大鼠鞘内单独注射哇巴因0．25～5μg和替扎尼定0．5～5μg产生剂量依赖性抗神经病理性疼痛的作用（P〈0．05）。Isobologram分析显示大鼠鞘内哇巴因和替扎尼定混合物,两者产生明显的协同效应（P〈0．05）。鞘内阿托品或育亨宾预处理,能够拈抗单独注射哇巴因2．5μg、替扎尼定5μg、哇巴因复合替扎尼定（1／2ED。）的作用（P〈0．05）。结论大鼠鞘内单独注射哇巴因、替扎尼定产生剂量依赖性的抗神经病理性疼痛的作用;鞘内哇巴因混合替扎尼定产生协同作用,其机制可能与中枢α2-肾上腺素受体和胆碱能受体有关。     

肾移植的超声动态观察

目的探讨超声动态观测肾移植手术的临床应用价值。方法应用超声对112例肾移植手术病例进行术前术后检测。重点观察肾移植术后第3、7天、术后1个月及术后3个月内移植肾形态结构、血流动力学各项参数。结果112例肾移植病例中,术后彩色多普勒超声及时发现手术并发症37例,其中急性排斥反应8例,髂动脉与肾动脉吻合口处肾动脉狭窄6例;肾盂积水15例;肾周积液8例。结论应用超声动态观察肾移植术前、术后肾内血流灌注情况,以各项指标进行临床评估,有助于及早发现术后并发症,并有效地指导治疗,对于提高肾移植术的成功率和患者的生存率具有重要意义。     

肾舒胶囊对家兔系膜增殖性肾炎ET-1和CGRP的影响

目的通过观察家兔系膜增殖型肾炎(MSPGN)血内皮素(ET-1)和降钙素基因相关肽(CGRP)水平的变化,探讨肾舒胶囊治疗MSPGN的作用机制。方法应用生物化学、放射免疫和自动图像分析的方法。检测24小时尿蛋白的排泄量,血浆ET-1及CGRP及肾组织系膜基质面积的变化。结果MSPGN家兔24小时尿蛋白排泄量升高,ET-1升高,CGRP降低,系膜基质面积增大与肾舒胶囊治疗组相比具有显著性差异(P<0.05)。结论MSPGN家兔ET-1升高CGRP降低,系膜基质面积增宽。肾舒胶囊通过升高CGRP降低ET-1,降低肾小球系膜基质面积对MSPGN有明显保护作用。     

我国汽车产业竞争力的影响要素分析

汽车产业具有高技术、高附加价值、资本密集度大,进入壁垒和退出壁垒高、规模经济效应显著等特征。影响我国汽车产业发展的要素包括政府、产业组织、企业、资源禀赋以及市场需求等。中国汽车产业的发展需要利用优势要素,提升劣势要素,增强我国汽车产业的竞争力。     

夏枯草提取物诱导B、T淋巴瘤细胞凋亡的实验研究

目的:研究夏枯草提取物对人B淋巴瘤Raji细胞及T淋巴瘤Jurkat细胞增殖的影响及其差异,探讨夏枯草提取物体外抗淋巴瘤的作用机制。方法:不同浓度的夏枯草提取物分别作用于Raji细胞及Jurkat细胞;48 h后分别收集各组细胞,应用MTT法、琼脂糖凝胶电泳法及流式细胞技术分别检测每组细胞的增殖抑制率、细胞凋亡率及细胞凋亡情况;Western blot检测BCL-2及BAX蛋白表达变化。结果:不同浓度的夏枯草提取物对Raji及Jurkat细胞均有明显的增殖抑制作用(P0.01),且对Raji细胞的抑制作用大于Jurkat,其对Raji细胞IC50(18.01±0.92)μg/mL显著低于Jurkat细胞(25.47±0.96)μg/mL(P0.05);凝胶电泳检测结果表明夏枯草提取物处理Raji及Jurkat细胞后均出现凋亡相关DNA Ladder;随夏枯草提取物浓度的增加,Raji及Jurkat细胞的早期凋亡率均显著增加,与空白对照组比较差异显著(P0.01),浓度为15、20、25μg/mL的夏枯草提取物作用于Raji及Jurkat细胞后的早期凋亡率分别为(9.4±0.25)%、(21.68±0.46)%、(35.03±0.35)%和(4.06±0.14)%、(13.59±0.23)%、(22.92±0.20)%,同浓度条件下,Raji细胞的早期凋亡率显著高于Jurkat细胞(P0.01);随夏枯草提取物浓度增加,实验组细胞中BCL-2蛋白的表达逐渐减弱,BAX蛋白的表达逐渐增强,与空白对照组比较均有显著性差异(P0.05),同浓度条件下,Raji细胞内BCL-2蛋白表达的下降程度、BAX蛋白表达的增加程度显著高于Jur-kat细胞(P0.05)。结论:夏枯草提取物具有抑制淋巴瘤细胞增殖的作用,其机制可能与调节BCL-2和Bax蛋白的表达以诱导细胞凋亡有关,且夏枯草提取物对Raji细胞的抑制作用大于Jurkat细胞。     

大孔树脂纯化绵茵陈中总有机酸和绿原酸的研究

目的:研究大孔树脂分离纯化绵茵陈中总有机酸和绿原酸的最佳工艺条件。方法:通过对绵茵陈总有机酸和绿原酸在9种大孔树脂上的吸附与解吸附特性的比较,筛选最佳树脂;采用正交试验及单因素考察等方法对该树脂纯化绵茵陈提取液中总有机酸和绿原酸的工艺条件进行优选。结果:以HPD200A型大孔树脂为分离载体,树脂柱径高比为1∶6,样品液浓度为1 g/mL,上柱体积流量为1 BV/h(1 BV=1柱体积),吸附量为生药1.5 g/g树脂,先用3 BV水洗脱除杂,再用2 BV 90%乙醇解吸,过柱后总有机酸和绿原酸的精制度分别为588.74%和567.89%。结论:HPD200A型大孔树脂纯化绵茵陈中总有机酸和绿原酸的工艺简便可靠,可用于规模化生产。     

Anti-diabetic atherosclerosis effect of Prunella vulgaris in db/db mice with type 2 diabetes

Diabetes mellitus is the leading cause of vascular complications such as atherosclerosis. This study was designed to investigate whether Prunella vulgaris (APV) would inhibit diabetic atherosclerosis in db/db mice with type 2 diabetes. The db/db mice were treated with high fat/high cholesterol (HFHC) diet and an aqueous extract of APV (100 and 200 mg/kg/day) for eight weeks to examine the long-term effect on metabolic abnormalities and diabetic atherosclerosis. APV treatment markedly lowered blood glucose and systolic blood pressure. The db/db mice experienced an increase in blood urea nitrogen as well as a decrease of creatinine clearance, the latter of which was restored by treatment with APV. Treatment with APV markedly decreased total plasma cholesterol, triglyceride, and LDL-cholesterol and also increased the HDL-cholesterol. In addition, malondialdehyde and TGF-β1 were decreased by treatment of APV. On the other hand, total NO level was decreased in db/db mice. However, the NO level was increased by treatment with APV, suggesting an association with vascular dysfunction. Vascular relaxation of aortic rings by acetylcholine or SNP-inducement was ameliorated by APV in a dose-dependent manner. Damage of vascular intima and hypertrophic of media were observed in db/db mice; however its dysfunction was improved by the treatment of APV. APV treatment significantly reduced the aortic expressions of ICAM-1, VCAM-1, ET-1, and nitrotyrosine. Furthermore, expression of eNOS in aortic was remarkably increased by APV treatment. Taken together, APV suppressed hyperglycemia and diabetic vascular dysfunction in HFHC diet-db/db mice. The present data suggest that Prunella vulgaris may prevent development of diabetic atherosclerosis.     

Research on fuzi based on animal thermotropism behavior to discover if it has fewer hot characteristics without Ganjiang

[OBJECTIVE]:To investigate whether Fuzi (Radix Aconiti Praeparata) has fewer hot characteristics when administered without Ganjiang (Rhizoma Zingiberis).[METHODS]:Differences in the thermotropism behaviors of mice treated either with Fuzi (Radix Aconiti Praeparata),Ganjiang (Rhizoma Zingiberis) or the combination of the two given intragastrically were investigated using the Animal Thermotropism Behavior Surveillance System.The water intake volume,oxygen consumption volume,adenosine triphosphatase (ATPase) activity,total antioxidant capacity (T-AOC) and total superoxide dismutase (T-SOD) activity were determined during the investigation.[RESULTS]:When Fuzi and Ganjiang were administered together,the rate at which mice remained on a warm plate (remaining rate) and the times and distances of their movement were all significantly reduced (P＜0.05).Compared with the Normal group,the reduction was 55.1％,48.3％ and 44.8％,while compared with the Fuzi group,the reduction was 57.6％,34.3％ and 36.0％,indicating that coldtropism was significantly increased.Compared with the Normal and Fuzi groups,the ATPase activity and the respiratory oxygen consumption volume of the Fuzi + Ganjiang group were significantly increased (P＜0.05),suggesting an improvement in energy metabolism and showing a hot characteristic when Fuzi and Ganjiang are present together.Additionally,the T-AOC and T-SOD activity were significantly enhanced (P＜0.05).[CONCLUSION]:The behavior of mice tending toward cold tropism can be regarded as a quantitative reflection of Fuzi having fewer characteristics consistent with a hot nature when not used with Ganjiang,the functional mechanism of which may be a change in the ATPase activity in liver tissue.