冠心病患者心电图ST段水平与IL-6和脂蛋白(a)水平的关系

目的 研究冠心病患者心肌缺血情况下循环中白细胞介素-6(IL-6)和脂蛋白(a)[LP(a)]水平的关系和临床意义。方法 用ELISA分析试剂盒检测62例冠心病患者和50例健康对照者血浆IL-6，用免疫透射比浊法检测血滑LP(a)，并对心电图(EKG)ST段的情况进行比较。结果 冠心病组血浆IL-6和血清LP(a)水平均较健康对照组显著增高(P＜0．01)。与健康对照组相比，ST段异常组和ST段正常组血浆IL-6水平均显著增高(P＜0．01)；ST段异常组血浆LP(a)水平显著增高(P＜0．01)，ST段正常组血清LP(a)水平有所增高，但无统计学意义(P＞0．05)。ST段异常组血浆IL-6和血清LP(a)水平均显著高于ST段正常组(P＜0．05，P＜0．01)。冠心病患者血浆IL-6和血滑LP(a)水平存在显著的相关性(P＜0．05)。结论 冠心病患者循环中IL-6和LP(a)水平显著升高，高水平IL-6和LP(a)可能反映血管和心肌损伤的发生，LP(a)的增加可能与IL-6刺激肝脏合成LP(a)增加有关。     

The distribution profiles of very low density and low density lipoproteins in poorly-controlled male,Type 2 (non-insulin-dependent) diabetic patients

Summary The distribution and composition of lipoproteins spanning the very low density and low density lipoprotein spectra have been analysed in ten poorly-controlled, male, Type 2 (non-insulin-dependent), diabetic patients pre-disposed to mild, secondary hypertriglyceridaemia. As compared to age-matched control subjects, the diabetic patients displayed grossly modified, distinctly atherogenic lipoprotein profiles. Modifications were not limited to the very low density lipoprotein profile, as would be expected from the pre-treatment hypertriglyceridaemia. There was also an aberrant low density lipoprotein profile, which was not evident from plasma cholesterol measurements, especially as the diabetic patients at entry were well matched to control subjects with respect to plasma levels of this lipid. Compositional abnormalities were also observed in the poorly-controlled diabetic group, although these were less marked than the distributional changes. There were substantial improvements of the abnormalities detailed above, even over a short treatment period (two weeks), with therapy designed primarily to ameliorate metabolic control. The data suggest that, in the presence of poor metabolic control and hypertriglyceridaemia, occult, atherogenic modifications of low density lipoproteins can occur. The results argue in favour of strict control of triglyceride levels even in diabetic patients with apparently acceptable cholesterol levels.     

Oxidative modification of high density lipoprotein induced by cultured human arterial smooth muscle cells

Objective: To observe the oxidative modification of high density lipoprotein (HDL) induced by culturedhuman arterial smooth muscle cells (SMCs). Methods: HDL cocultured with SMCs at 37℃ in 48 h was subjected,and native HDL (N-HDL) served as control. Oxidative modification of HDL was identified by using agarose gel electro-phoresis. Absorbances of conjugated diene (CD) and lipid hydroperoxide (LOOH) were measured with ultravioletspectrophotometry at 234 and 560 nm respectively, and fluorescence intensity of thiobarbuturic acid reaction substance     

Sevelamer hydrochloride with or without alphacalcidol or higher dialysate calcium vs calcium carbonate in dialysis patients: an open-label, randomized study.

BACKGROUND: Sevelamer hydrochloride was recently proposed as a phosphate binder to prevent hypercalcaemia in place of calcium alkaline salts in dialysis patients. So far, it has been evaluated only in patients receiving calcitriol, without comparison with CaCO(3) alone, although the latter was found to be as effective as the combination of calcitriol and Al(OH)(3) in suppressing parathyroid hormone (PTH) without inducing hypercalcaemia and to have a better lowering effect on serum phosphate. Moreover, this bile salt binder may decrease serum 25-OH vitamin D. Therefore, we compared for 5 months two strategies for controlling moderate hyperparathyroidism: CaCO(3) alone vs sevelamer in conjunction with measures to increase calcium balance. METHODS: Forty-two patients were randomized: 21 continued their treatment with 4.8 g/day CaCO(3) and 21 were switched to sevelamer (initial dose: 2.4 g/day, increased to 4.4 g/day). Each month, when serum-corrected calcium decreased below 2.30 mmol/l, dialysate calcium was increased or alphacalcidol was given at each dialysis session, according to serum PO(4) levels. The following parameters were monitored: serum Ca, PO(4), bicarbonate and protein, weekly; and serum PTH, 25-OH vitamin D and total, LDL and HDL cholesterol monthly. RESULTS: Except for higher serum phosphate at month 1, lower serum bicarbonate at month 2 and lower LDL cholesterol at month 5 in the sevelamer group, no difference was found between the two groups. Compared with baseline levels, PTH increased and 25-OH vitamin D decreased significantly in both groups, these two parameters being inversely correlated. CONCLUSIONS: Given comparable control of plasma calcium, phosphate and 25-OH vitamin D, PTH control is comparable in both strategies. Sevelamer does not induce greater vitamin D depletion than CaCO(3). The transient decrease of serum bicarbonate after discontinuation of CaCO(3) in the sevelamer group suggests a less optimal prevention of acidosis. The sevelamer-induced decrease in LDL cholesterol gives this drug a potential advantage in cardiovascular prevention.     

有机结合 共同发展——从血清脂蛋白谱研究谈中西医结合体会

在整体观和平衡观的基础上 ,创立双梯度聚丙烯酰胺凝胶电泳法 ,应用于同步分离血清脂蛋白及其亚组分 ,检测血清脂蛋白谱 (SLPG) ,以及“内脾虚”的基础和临床研究 ,并逐步建立了新的理论体系。SLPG较理想地表达了血清脂蛋白动态平衡的状态 ,是中西医结合认识血脂代谢和“脾气散精”功能的新指标。实践提示 ,有机结合和共同发展应是现代中西医结合研究面临的主要任务之一。     

高压交变电磁场对心血管疾病康复的应用

应用高压交变电磁场对134例冠心病及高血压病患者进行临床应用，结果显效67例，好转55例，无效12例；有效地改善了脂蛋白代谢，降低TG、Tc、LDL-c及致动脉硬化指数．升高HDL-c浓度；降低了高血压病患者的血压；改善了冠心病患者的心电图；同时可改善心功能参数及心室负荷。由此可见，高压交变电磁场能抗动脉粥样硬化，对心血管疾病有显著的治疗作用。     

Cholesterol and atherosc lerosis

Cholesterol is an essential component of cellular membranes, but when present in excess in the circulation, can be deposited in the arterial wall, leading to the formation of atherosclerotic lesions. The principal plasma carrier of cholesterol, low density lipoprotein (LDL), is removed from the circulation by LDL receptors in the liver. This process plays a critical role in regulating plasma LDL levels. The unique structure and composition of the LDL particle makes it particularly susceptible to modification by oxidative reactions. Current evidence suggests that the production of oxidised LDL in the intima, and the removal of oxidised LDL particles by scavenger receptors on macrophages, play a central role in the development and progression of atherosclerotic lesions.     

氧化胆固醇对动脉毒性作用的研究

将Wistar大鼠随机分成氧化胆固醇组(Och)、纯胆固醇组(Pch)和对照组,分别用氧化胆固醇混合物(250mg/kg bw/d)、纯胆固醇(250mg/kg bw/d)以及悬浮固醇用的明胶液体给大鼠灌胃,连续二天。于第二次灌胃后18小时,从大鼠尾静脉注射伊文思兰溶液,并于注射后2小时处死;取出主动脉用荧光显微分光光度术测定主动脉内膜的通透性。此外,另一部分动物在第二次灌胃后24小时处死,取出主动脉作扫描电镜的内膜观察。结果表明,Och大鼠主动脉内膜的通透性显著高于Pch组与对照组大鼠(P<0.01),而Pch组大鼠主动脉内膜的通透性和对照组无显著差异(P>0.05)。     

Brevibacterium sp.DGCDC-82发酵罐中生产胆固醇氧化酶

用Brevibacterium sp.DGCDC-82在7L发酵罐中分批培养.分别对添加剂吐温-80、培养温度、培养基的pH、通风量和搅拌速度在胆固醇氧化酶的生产中的影响进行了研究.结果显示以上条件均对产酶有影响.在不同的发酵阶段改变发酵操作条件,发酵20 h最高酶活可达1203U/L,生产强度可达60 U/(L·h).既有效地提高了胆固醇氧化酶的产量,又防止了发酵过程中的泡沫外溢.     

假单胞菌胆固醇酯酶的生产Ⅰ.菌种筛选和发酵条件的研究

通过平板初筛和摇瓶复筛,从371株菌中筛得一株有工业生产价值的胆固醇酯酶产生菌,并对它进行了发酵条件的研究。用所获得的胆固醇酯酶配制的三酶试剂具有良好的稳定性,适用于临床检测。