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1.
目的观察丹红注射液对动脉粥样硬化(AS)家兔模型脂代谢及血管内皮功能的影响,探讨丹红注射液抗AS作用及可能机制。方法36只新西兰雄性白兔随机均分为正常对照组、高胆固醇组(HC组)、高胆固醇加氟伐他汀组(FC组)和高胆固醇加丹红注射液组(DC组);组织形态学分析AS斑块/内膜面积比值及斑块最厚处内膜厚度/中膜厚度比值;酶法检测血脂;酶法测定血清一氧化氮(NO)和血浆内皮素(ET)水平。结果DC组与HC组比较,血清TC、LDL-C明显降低(P<0.05);血管AS病变显著减轻(P<0.05),血清NO水平显著增高(P<0.05);血浆ET水平显著降低(P<0.05)。结论丹红注射液对实验性AS具有抑制作用,其作用机制可能为①降低血清TC和LDL-C水平,延缓AS斑块的形成;②调节血管内皮细胞生成和释放NO、ET,保护血管内皮细胞功能,进而产生抗AS作用。  相似文献
2.
一氧化氮合酶/一氧化氮系统与心血管疾病   总被引:9,自引:0,他引:9  
一氧化氮在心血管疾病中发挥了重要作用;一氧化氮是在一氧化氮合酶催化下生成的。三种不同的一氧化氮合酶在心血管疾病中的作用各不相同,通过对一氧化氮合酶的干预将成为心血管疾病治疗的新策略。现就国内外在一氧化氮合酶/一氧化氮系统与心血管疾病方面的主要研究进展进行综述。  相似文献
3.
Summary Moderately increased plasma concentrations of C-reactive protein are associated with an increased risk of cardiovascular disease. C-reactive protein, its relation to a low degree of inflammatory activation and its association with activation of the endothelium have not been systematically investigated in Type I (insulin-dependent) diabetes mellitus. C-reactive protein concentrations were measured in 40 non-smoking patients with Type I diabetes without symptoms of macrovascular disease and in healthy control subjects, and in a second group of Type I diabetic patients (n = 60) with normo- (n = 20), micro- (n = 20) or macroalbuminuria (n = 20). Differences in glycosylation of α1-acid glycoprotein were assayed by crossed affinity immunoelectrophoresis. Activation of the endothelium was measured with plasma concentrations of endothelial cell markers. The median plasma concentration of C-reactive protein was higher in Type I diabetic patients compared with healthy control subjects [1.20 (0.06–21.64) vs 0.51 (0.04–9.44) mg/l; p < 0.02]. The Type I diabetic subjects had a significantly increased relative amount of fucosylated α1-acid glycoprotein (79 ± 12 % vs 69 ± 14 % in the healthy control subjects; p < 0.005), indicating a chronic hepatic inflammatory response. In the Type I diabetic group, log(C-reactive protein) correlated significantly with von Willebrand factor (r = 0.439, p < 0.005) and vascular cell adhesion molecule-1 (r = 0.384, p < 0.02), but not with sE-selectin (r = 0.008, p = 0.96). In the second group of Type I diabetic patients, increased urinary albumin excretion was associated with a significant increase of von Willebrand factor (p < 0.0005) and C-reactive protein (p = 0.003), which were strongly correlated (r = 0.53, p < 0.0005). Plasma concentrations of C-reactive protein were higher in Type I diabetic patients without (clinical) macroangiopathy than in control subjects, probably due to a chronic hepatic inflammatory response. The correlation of C-reactive protein with markers of endothelial dysfunction suggests a relation between activation of the endothelium and chronic inflammation. [Diabetologia (1999) 42: 351–357] Received: 4 September 1998 and in final revised form: 24 November 1998  相似文献
4.
冠心病血管内皮功能、颈动脉硬化与冠脉病变的关系   总被引:8,自引:3,他引:5  
目的:观察冠心病(CAD)患者内皮依赖性舒张功能及颈动脉粥样硬化的状况及与冠状动脉病变的相关性。方法:选经冠状动脉造影确诊为CAD的患者106例(观察组),冠状动脉造影证实无冠状动脉狭窄的健康者40例(正常对照组),采用二维超声检测肱动脉内皮依赖性和非依赖性舒张功能及颈动脉粥样硬化病变。颈动脉粥样硬化斑块积分采用Sutton法,并与冠状动脉病变程度进行对比分析。结果:CAD组内皮依赖性血管舒缩功能(FMD)比正常对照组明显降低(P〈0.01),内皮非依赖性血管舒缩功能与正常对照组比较无显著性差异(P〉0.05);CAD组颈动脉内膜中层厚度(IMT),斑块积分显著高于正常对照组(P〈0.01)。FMD与冠脉病变程度呈负相关(r=-0.651,P〈0.001),颈动脉IMI及斑块积分与冠脉病变程度呈正相关(r=0.871,0.702,P〈0.001)。结论:内皮细胞功能障碍和颈动脉粥样硬化与冠状动脉粥样硬化的病变相平行。  相似文献
5.
心肌桥研究的新进展   总被引:8,自引:0,他引:8  
正常情况下,冠状动脉及其分支,一般走行于心外膜下脂肪组织中。心肌桥是指冠脉某一段或其分支的某一段走行于心肌纤维中,该心肌纤维束称为心肌桥。1737年Reyman在尸检中发现心肌桥,1960年Portmann和Iwig首先报道了心肌桥的影像学表现——收缩期狭窄。长期以来,心肌桥被认为是一种良性病变,现有诸多报道指出心肌桥可以引起急性冠脉综合征、严重的心律失常甚至猝死。很多研究认为肌桥对该段的冠脉有“保护”作用,而在肌桥的近端易形成动脉粥样硬化。随着新技术(如经血管超声及冠脉多普勒导丝研究)的发展,揭示了心肌桥的解剖学特点和病理生理过程。治疗方面包括药物、支架及手术等。  相似文献
6.
越来越多的研究表明心血管危险因素导致了颈动脉内膜中层厚度(IMT)增厚;超声检测到的颈动脉粥样硬化与冠脉造影所示的冠状动脉粥样硬化严重程度明显相关。目前颈动脉IMT可作为反映动脉粥样硬化的指标。由于颈动脉超声检查无创、准确、简便、重复性好,可用于对新发现的或已确定的危险因素进行综合评价,也可用于通过临床对高危因素干预后,动态观察动脉粥样硬化的进展及消退,还对冠心病高危人群发生心血管事件的预测具有重要意义。  相似文献
7.
瑞舒伐他汀抗动脉粥样硬化的临床应用进展   总被引:7,自引:0,他引:7  
许多大规模临床试验已证实他汀类药物明显降低冠心病的发病率和心血管事件的发生,强化调脂治疗在极高危患者中的地位日益受到重视。与其他他汀类药物相比,瑞舒伐他汀具有一些有利的药理特性,一系列临床研究也显示,此药对各类血脂异常患者的LDL-C降低效果均显著优于同类其他药物。现综述几个新近的关于瑞舒伐他汀在抗动脉粥样硬化应用方面的大规模临床研究。  相似文献
8.
Heine RJ  Dekker JM 《Diabetologia》2002,45(4):461-475
Type II (non-insulin-dependent) diabetes mellitus is associated with a considerably enhanced risk of cardiovascular disease morbidity and mortality. Several epidemiological studies have shown an association between the 2-h glucose value after a 75 gm glucose load (2hPG) and mortality from all causes and from cardiovascular disease. The key question is whether postprandial glucose is related causally to the adverse outcomes (risk factors) or just a marker of risk. Since insulin resistance is one of the determinants of the 2hPG, factors associated with the insulin resistance syndrome, in particular postprandial hypertriglyceridaemia, also need to be considered. Glycaemic excursions could contribute to oxidative stress, endothelial dysfunction, formation of advanced glycation end-products and prolongation of the QTc interval. However, high postprandial concentrations of triglyceride rich lipoproteins, which can be partly attributed to obesity and insulin resistance, have now been recognised to affect endothelial function, to promote atherogenesis, and to be associated with coronary artery disease. On the basis of present evidence Type II diabetic patients require good overall glycaemic control, as reflected by target values of HbA1 c. However, postprandial hyperglycaemia should be considered as a marker of underlying metabolic abnormalities. Therefore, at present there is no evidence to support the recommendation to consider postprandial hyperglycaemia as a treatment target in itself and would thus require intervention studies showing added benefit of selectively targeting at meal-related glucose excursions in patients with an adequate HbA1 c. Drugs aiming at improving only postprandial glucose values are not likely to lower the excess mortality associated with Type II diabetes. [Diabetologia (2002) 45: ▪–▪] Received: 13 September 2001 and in revised form: 19 October 2001  相似文献
9.
AIMS: Endothelial progenitor cells (EPCs) are found in the peripheral circulation and are capable of endothelial repair and neovascularization. EPC number and function are reduced in subjects with cardiovascular risk factors or proven coronary artery disease (CAD). We hypothesized that EPC number and/or function may be genetically regulated and may vary in healthy adult offspring depending on parental history of CAD. METHODS AND RESULTS: We studied 102 subjects comprising 24 healthy parent-healthy offspring pairs and 27 CAD parent-healthy offspring pairs. We measured the number of circulating CD34(+)VEGFR-2(+) and AC133(+)VEGFR-2(+) EPCs, the number of EPCs grown in culture, and the migration capacity of cultured EPCs towards vascular endothelial growth factor. There was significant correlation in the number of cultured EPCs between healthy parents and their offspring (R = 0.492, P = 0.015) and CAD parents and their offspring (R = 0.751, P < 0.001). Offspring of subjects with CAD had significantly higher numbers of circulating CD34(+)VEGFR-2(+) and AC133(+)VEGFR-2(+) cells (P = 0.018 and P < 0.001, respectively). There was no difference in migration capacity between groups. CONCLUSION: Our results suggest that EPC number is, at least in part, genetically regulated. Circulating EPCs may represent biological markers of occult vascular damage in offspring with hereditary risk of CAD.  相似文献
10.
颈动脉粥样硬化相关因素分析及超声评价的意义   总被引:6,自引:4,他引:2  
目的:调查中老年人颈动脉粥样硬化患病率,探讨颈动脉硬化与心血管危险因素的关系。方法:228例年龄55~87岁的中老年人行双侧颈动脉超声检查,测量颈动脉内-中膜厚度(carotid intimamedia thickness,CIMT)及动脉硬化斑块的大小及数量,观察斑块性质。调查该组人群心脑血管疾病及其危险因素,并比较与颈动脉病变的关系。结果:本组颈动脉粥样硬化患病率为64.9%。单因素分析显示颈动脉IMT及/或斑块积分增加的影响因素有年龄、高血压(主要为收缩期血压增高)、糖尿病及吸烟等;多元回归分析进一步表明颈动脉硬化与年龄、高血压及糖尿病显著相关。结论:颈动脉超声检测CIMT及斑块是一种安全简便有效的方法,结合相关危险因素综合评价,对心血管疾病防治有重要临床意义。  相似文献
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