阿司匹林对波动高糖诱导内皮损伤过程中血小板活化的影响

目的观察阿司匹林对波动高糖诱导内皮损伤过程中血小板活化的影响。方法体外构建波动高糖损伤人脐静脉内皮细胞模型,并以模型组细胞上清液作为诱导剂,与健康人血小板进行共孵育;体内构建2型糖尿病血糖波动大鼠模型。体内、外实验均分为正常(N)组、稳定高糖(W)组、波动高糖(B)组和波动高糖+阿司匹林(ASA)组。分别应用细胞计数试剂盒测得阿司匹林半数致死量,按实验动物与人体表面积比等效剂量换算表计算阿司匹林体外、体内实验中的剂量。细胞实验中给予ASA(1 mmol·L^-1)干预15 min后加入健康人血小板,测定人血小板最大聚集率、细胞培养上清液s E-selectin和v WF水平;动物实验中给予ASA(60 mg·kg^-1·d^-1)灌胃1次,干预6周后测定大鼠血清s E-selectin和v WF水平,以及大鼠血小板膜蛋白CD62p表达。结果与N组相比,W组和B组细胞上清及2型糖尿病大鼠血清v WF和s E-selectin含量均明显增多(P<0.01),健康人外周血血小板最大聚集率及大鼠血小板膜蛋白CD62p表达均明显增加(P<0.01),且两组间具有明显差异(P<0.05或P<0.01)。ASA干预后,v WF和s E-selectin含量均明显下降(P<0.01),人血小板最大聚集率及大鼠血小板膜蛋白CD62p表达亦明显降低(P<0.01)。结论波动高糖不仅可以导致明显的血管内皮损伤,也可诱发血小板出现过度活化聚集,阿司匹林对此均具有明显抑制效应。     

基因表达系列分析及其在心血管系统中的应用

基因表达系列分析 (SAGE)是近年发展起来的用于大规模研究基因表达的新方法 ,具有发现新基因及基因表达定量分析的功能。其主要优点是不需事先知道基因序列且能提供组织或细胞中每一个转录本的定性和定量信息 ,对低丰度转录本敏感并可发现新的转录本。同时 ,SAGE数据库的电子特性又可允许不同研究者构建的文库之间直接进行比较。本文对SAGE技术的演进及其近年来在心血管系统疾病研究中的应用作一总结。     

血小板膜GPⅡb/Ⅲa活性与缺血性心脑血管疾病

目的:探讨血小板膜GPⅡb/Ⅲa与心脑血管病之间的关系以及GPⅡb/Ⅲa受体拮抗剂在心脑血管病治疗中的地位。资料来源:应用计算机检索Medline1993-01/2005-12关于血小板膜GPⅡb/Ⅲa与心脑血管病关系的文章。检索词“platelet,GPⅡb/Ⅲa,ischemicheartdisease,ischmicstroke”,并限定文章的语种类为English。同时利用计算机检索中国期刊全文数据库1994-01/2005-12的相关文章,限定文章语言种类为中文,检索词“血小板,血小板糖蛋白GPⅡb/Ⅲa复合物,冠心病,缺血性脑卒中”。资料选择:对资料进行初审,纳入标准:①血小板膜GPⅡb/Ⅲa活性与血小板激活机制。②血小板膜GPⅡb/Ⅲa活性与心脑血管病相关性。③血小板膜GPⅡb/Ⅲa拮抗剂的作用特点。排除标准:排除重复性研究。资料提炼:共收集到符合上述要求的文献41篇,排除28篇重复性研究。13篇符合纳入标准。其中7篇关于血小板膜GPⅡb/Ⅲa活性与血小板激活机制及与心脑血管病相关性研究,6篇关于血小板膜GPⅡb/Ⅲa拮抗剂作用特点。资料综合:血小板活化在缺血性心、脑血管病的发生、发展中起重要作用,而血小板膜GPⅡb/Ⅲa与纤维蛋白原等黏附蛋白结合,是多种因素引起血小板活化的最终共同通路,因此,血小板GPⅡb/Ⅲa与缺血性心脑血管病密切相关。GPⅡb/Ⅲa受体拮抗剂是一类新的非常有前途的抗血小板药。结论:血小板GPⅡb/Ⅲa与缺血性心脑血管病密切相关。GPⅡb/Ⅲa受体拮抗剂是一类新的非常有前途的抗血小板药。     

蒺藜总皂苷对家兔动脉粥样硬化ET/NO和NOS影响的研究

目的观察蒺藜总皂苷对动脉粥样硬化家兔血内皮素(ET)、血浆一氧化碳(NO)水平和一氧化氮合酶(NOS)的影响,并探讨其对动脉粥样硬化的治疗作用.方法取50只健康雄性日本大耳白兔,随机取10只作为正常对照组喂普通饲料,其余40只给予高脂饮食喂养4周后,再随机分为4组,每组10只:模型组继续喂高脂饲料;小剂量治疗组喂以高脂饲料和蒺藜总皂苷,每只6.3 mg/(kg·d);大剂量治疗组喂高脂饲料和蒺藜总皂苷,每只12.6 mg/(kg·d);阳性药物对照组,喂以高脂饲料和辛伐他汀,每只2.35 mg/(kg·d).2周后,测定血脂、血清NO和血浆ET水平及血管壁组织NOS的含量.结果小剂量、大剂量治疗组及阳性药物对照组的血浆内皮素-1(ET-1)水平明显较模型组低(P<0.05),血清NO水平及血管壁NOS的表达呈相反变化 (P<0.05).结论蒺藜总皂苷可降低血脂和血浆ET-1水平,提高血清NO及动脉壁组织NOS的表达,具有抗动脉粥样硬化作用.     

环氧合酶与心血管疾病

环氧合酶(COX)是花生四烯酸代谢途径的重要限速酶,其代谢产物在血小板聚集、炎症反应等心血管病理生理过程中发挥重要作用。近年来有关COX-2抑制剂心血管安全性的争论使得COX在心血管疾病中的作用越来越受重视。现就COX及其同工酶、COX在动脉粥样硬化、血栓形成、心肌缺血、心力衰竭等心血管疾病发生中的作用以及COX-2抑制剂心血管安全性等方面的进展作一综述。     

温心胶囊对异丙肾上腺素所致大鼠心肌缺血损伤保护作用的实验研究

温心胶囊治疗冠心病的临床与实验研究是黑龙江省政府重点科研资助课题。温心胶囊是黑龙江中医药大学曹洪欣教授通过大量临床观察 ,筛选出的有效复方制剂 ,本课题在曹洪欣教授主持下从临床与实验两方面展开深入研究 ,较为全面地探讨了该方抗动脉粥样硬化及抗心肌缺血作用机制 ,为临床推广应用奠定了基础。现将部分研究成果进行专题报道     

心脑舒通胶囊对小鼠心肌营养性血流影响的研究

目的:探讨心脑舒通胶囊对小鼠心肌营养性血流量的影响.方法:根据86Rb对心肌亲和力强的特点,采用同位素标记方法.结果:心脑舒通胶囊组较对照组可显著增加小鼠心肌营养性血流量(P＜0.01).结论:心脑舒通胶囊能够改善心肌氧和营养性物质的供应.     

冠心病稳定期因毒致病的辨证诊断量化标准

现代中医学认为,血瘀是冠心病发生发展过程的一个主要病机,但冠心病急性心血管事件发生所表现的临床表征和病理变化,似非单一“血瘀” 病因病机所能概括。根据传统中医学因毒致病特点的认识,冠心病急性心血管事件发生当存在因毒致病或“瘀”、“毒”从化互结致病的病因病机。利用临床流行病学方法,制订符合循证医学理念的冠心病因毒致病的辨证诊断及量化标准,对早期识别冠心病高危人群,促进中医在冠心病防治领域发挥既病防变相关干预措施的优势,提高临床疗效,具有重要意义。     

Effect of chinese herbal drug-containing serum for activating-blood and dispelling-toxin on ox-LDL-induced inflammatory factors’ expression in endothelial cells

<正>Objective:To investigate the effects of drug-containing serum of Chinese herbal compound, Xiongshao Capsule(芎芍胶囊,XS,for activating-blood) and Huanglian Capsule(黄连胶囊,HL,for dispellingtoxin) on the oxidized low-density lipoprotein(ox-LDL)-induced inflammatory factors in human umbilical vein endothelial cells(HUVECs).Methods:Thirty-two rats were randomly divided into four groups:the blank control group treated with distilled water,the positive control group treated with simvastatin(1.8 mg/kg),the test group I treated with Chinese herbal compound of XS(0.135 g/kg),and the test group II treated with Chinese herbal compound of XS(0.135 g/kg) and HL(0.135 g/kg).All the treatments were administered for 7 successive days by gastrogavage.Rats' blood serum was harvested 1 h after the last administration to prepare respective drugcontaining serum.HUVECs were exposed to ox-LDL(100μg/mL) to induce cell injury model and incubated with corresponding drug-containing serum for 24 h.Untreated HUVECs were set for blank control.Levels of interleukin-6(IL-6),tumor necrosis factor-α(TNF-α),and soluble intercellular adhesion molecule-1(slCAM-1) in supernatant of cultured HUVECs were determined by enzyme-linked immunosorbent assay(ELISA).HUVEC surface expressions of ICAM-1 and E-selectin were determined by flow cytometry.Results:Levels of IL-6, TNF-α,and slCAM-1 in the supernatant of HUVECs as well as the cell surface expressions of ICAM-1 and E-selectin significantly increased after 24-h ox-LDL stimulation(P0.01),while the abnormal elevations,except slCAM-1 in the test groupⅠ,were all reduced in the treated groups(the positive control and the two test groups) significantly(P0.01 or P0.05).Besides,the effect in the test group II seemed somewhat higher than that in the test group I but with no statistical significance(P0.05).Conclusion:Drug-containing serum of XS plus HL has a certain inhibitory effect on the vascular endothelial inflammation response induced by ox-LDL.     

Effect of Chinese Drugs for Activating Blood Circulation and Detoxifying on Indices of Thrombosis Inflammatory Reaction and Tissue Damage in A Rabbit Model of Toxin-Heat and Blood Stasis Syndrome

Objective:To observe the regulatory effect of Chinese drugs for activating blood circulation(ABC) and for activating blood circulation and detoxifying(ABCD) on indices of thrombosis,inflammatory reaction, and tissue damage in a rabbit model of toxin-heat and blood stasis syndrome.Methods:Fifty-four rabbits were randomized into the normal control group,model group,simvastatin group(simvastatin,0.93 mg/kg per day),ABC group[Xiongshao Capsule(芎芍胶囊),0.07 g/kg per day],and ABCD group[Xiongshao Capsule,0.07 g/kg per day,and Huanglian Capsule(黄军胶囊),0.14 g/kg per day].All except the normal control group received a single injection of bovine serum albumin and were fed with high-fat diets for 6 weeks.At the end of week 4 of giving highfat diets,a dose of endoxitin was given by ear vein injection,and a randomized 2-week treatment was initiated. At the end of treatment,blood lipids,circulating endothelial cells,and the pathological changes of the aortic arch were assessed.The serum levels of matrix met alloproteinases(MMP-9),tissue inhibitors to met alloproteinase (TIMP-1),granule membrane protein-140(GMP-140),plasminogen activator inhibitor-1(PAI-1),high-sensitivity C-reactive protein(hs-CRP),interleukin-6(IL-6),and tumor necrosis factor-α(TNF-α) were determined.Results: Compared with the model group,ABCD group showed decreased serum triglyceride(TG) level,improvement in the pathological change in the aortic arch,and reduction in the number of circulating endothelial cells(4.00±1.41 per 0.9μL for ABCD group vs 7.83±1.72 per 0.9μl L for the model group).In addition,the levels of serum GMP-140,PAI-1,and IL-6 in ABCD group were also significantly reduced[0.79±0.20 ng/mL,5.23±1.39 ng/mL, 40.64±10.11 pg/mL for ABCD group vs 1.08±0.31 ng/mL,7.28±2.01 ng/mL,54.44±13.56 pg/mL for the model group,respectively,P<0.05].A trend showing improvement in the indices of thrombosis,inflammatory reaction, and tissue damage was observed in the ABC group when compared to the model group,but the changes were not statistically significant(P>0.05).Conclusions:Chinese drugs for activating blood circulation and detoxifying have beneficial effects on regulating indices of thrombosis(GMP-140 and PAI-1) and inflammatory reaction(IL-6) in rabbit model with toxic-heat and blood stasis.The effect of the activating blood circulation and detoxifying drugs in regulating the levels of serum GMP-140,PAI-1,and IL-6 was superior to that of the activating blood circulation drugs.