脑梗塞与红细胞胆固醇、血液超氧化物歧化酶、过氧化脂质水平关系探讨

检测１０９例脑梗塞患者和１００例健康对照者红细胞胆固醇（Ｅ－Ｃｈ）含量、血浆和红细胞超氧化物歧化酶（Ｐ－ＳＯＤ、Ｅ－ＳＯＤ）活性及血浆和红细胞过氧化脂质（Ｐ－ＬＰＯ、Ｅ－ＬＰＯ）含量的结果表明，患者组Ｅ－Ｃｈ、ＰＬＰＯ、Ｅ－ＬＰＯ平均含量皆显著高于对照组（Ｐ＜０．０５～０．００１），Ｐ－ＳＯＤ、Ｅ－ＳＯＤ平均活性皆显著低于对照组（Ｐ＜０．００１）；患者病情随Ｅ－Ｃｈ含量升高而加重，呈直线相关；患者Ｅ－Ｃｈ含量随Ｐ－ＳＯＤ、Ｅ－ＳＯＤ活性下降而升高，随Ｐ－ＬＰＯ、Ｅ－ＬＰＯ含量上升而升高，均呈直线相关。提示脑梗塞患者红细胞膜内脂质代谢异常与体内氧自由基反应和脂质过氧化反应病理性加剧有一定程度的相关性。     

脑梗塞与红细胞胆固醇,血液超氧化物歧化酶,过氧化脂质水平…

检测１０９例脑梗塞患者和１００例对照者红细胞胆固醇（Ｅ－Ｃｈ）含量、务 和红细胞超氧化物歧化酶（Ｐ－ＳＯＤ、Ｅ－ＳＯＤ）活性及血浆和红细胞过氧化脂质（Ｐ－ＰＯ、Ｅ－ＬＰＯ）含量的结果表明，患者组Ｅ－Ｃｈ、Ｐ－ＬＰＯ、Ｅ－ＬＰＯ平均含量皆显著高于对照组（Ｐ〈０．０５－０．００１），Ｐ－ＳＯＤ、Ｅ－ＳＯＤ平均活性皆显著低于对照组（Ｐ〈０．００１）；患者病情随Ｅ－Ｃｈ含量升高而加重，呈直线相关；患者Ｅ－     

甲型肝炎患者血清超氧化物歧化酶和过氧化脂质的变化

本文采用放免法和硫代巴比妥酸比色法测定了１０４例甲肝患者和３０例健康对照组的血清ＳＯＤ和ＬＰＯ水平。结果甲肝急性病期ＳＯＤ降低，ＬＰＯ升高，恢复期患者这些指标则可恢复正常。本文结果提示，甲肝患者发病后可出现氧自由基代谢紊乱，其发生与肝细胞损伤有关。动态观察血清ＳＯＤ和ＬＰＯ水平的变化对临床上判断肝细胞的损害程度和评估预后上有一定的意义。     

急性甲型肝炎过氧化脂质和超氧化物歧化酶变化的意义

急性甲型肝炎过氧化脂质和超氧化物歧化酶变化的意义刘灿虎，李彩霞，王娟，高峰，刘宝凤近年来，许多报告指出活性氧是引起多种脏器组织损伤的原因之一。为了探讨活性氧在病毒性肝炎发病和病理中的作用，我们对１９９４年１～３月住院的急性甲型肝炎患儿血浆脂质过氧化物...     

脂质过氧化与体外循环中红细胞损伤关系的实验研究

本文通过大体外循环模型（ｎ＝６），研究脂质过氧化对红细胞的损伤作用。体外循环期间血浆和红细胞膜过氧化脂质（Ｐ－ＬＰＯ和Ｅｍ－ＬＰＯ）含量增加，红细胞变形能力下降，血浆游离血红蛋白（ＰＦ－Ｈｂ）浓度升高，ＬＰＯ与红细胞滤过指数（ＩＦ）及ＰＦ－Ｈｂ间呈直线正相关。红细胞超氧化物歧化酶及Ｎａ＋－Ｋ＋－ＡＴＰ酶活力均发生改变。结果表明，脂质过氧化与体外循环造成红细胞损伤有重要关系。     

长期长跑运动对老年人超氧化物歧化酶和过氧化脂质的影响

目的　观察长期坚持长跑运动对老年人血液中氧自由基的影响。方法　测定坚持长跑运动 5年以上的老年人及对照组的超氧化物歧化酶 (SOD)和过氧化脂质 (LPO)等的变化。结果　长期参加长跑老年人的SOD和LPO与对照组均有显著性差异。结论　长期坚持长跑运动能很好得保持SOD的活性 ,增进机体内环境的稳定和对外环境的适应能力     

碘缺乏与机体脂质过氧化关系的探讨

对四川省叙永县碘缺乏病区学生血清中超氧化物歧化酶（ＳＯＤ）和脂质过氧化物（ＬＰＯ）含量测定的结果表明，碘缺乏病区学生血清中ＳＯＤ含量明显下降和ＬＰＯ含量增加的现象，与对照组间有显著性差异（Ｐ＜０．０１）。通过对碘缺乏与机体脂质过氧化相互关系的初步探讨，认为由碘缺乏引起的机体中ＳＯＤ含量减少和ＬＰＯ含量增加，将可能导致甲状腺细胞膜的损伤，甲状腺功能障碍。     

砷中毒患者红细胞免疫功能与脂质过氧化的相关关系

目的 了解燃煤型砷中毒患者红细胞（RBC）免疫功能与脂质过氧化关系。方法 将燃煤型砷中毒患者分为轻、中、重3组，选择距病区12km外的非燃用砷煤居民作对照组，分别检测各组RBC免疫功能和血浆MDA、SOD、GSH-Px，并分别与对照组比较。结果 燃煤型砷中毒患者RBC免疫功能损伤RBC-ICR高于对照组，RBC-CbRR低于对照组，患者MDA高于对照组，而SOD、GSH-Px则低于对照组。结论 氧化自由基堆积造成脂质过氧化损伤，这可能是患者RBC免疫功能受损的重要原因。     

冠心病患者中性粒细胞氧化代谢与血清超氧化物歧化酶和过氧化脂质的关系

目的　探讨冠心病心绞痛患者中性粒细胞氧化代谢与血清超氧化物歧化酶（ＳＯＤ）、过氧化脂质（ＬＰＯ）变化及其关系。方法　应用中性粒细胞化学发光（ＰＭＮ－ＣＬ）法检测５０例冠心病心绞痛患者中性粒细胞氧化代谢与血清ＳＯＤ、ＬＰＯ和心肌酶改变,并与３０ 例正常人比较。结果　心绞痛组ＰＭＮ－ＣＬ本底、峰值、积分及ＬＰＯ明显高于正常组,ＳＯＤ较正常组明显降低。不稳定心绞痛ＰＭＮ－ＣＬ峰值、积分及ＬＰＯ、ＣＫ、ＬＤＨ明显高于稳定性心绞痛组,且ＳＯＤ降低更明显。结论　冠心病心绞痛患者中性粒细胞氧化代谢增强,氧自由基产生水平与冠心病类型及病情轻重有关。     

血清脂质与脂质过氧化关系的临床研究

观察90例不同血脂水平的职工,发现高血脂者血清丙二醛(MDA)水平明显高于正常血脂者(P<0.001),而红细胞超氧化物歧化酶(SOD)活性两者间无明显差异(P>0.05)。多元回归分析表明,MDA仅与血清非高密度脂蛋白胆固醇呈正相关,而SOD仅与高密度脂蛋白胆固醇呈正相关。高血脂者经调节血脂治疗后,MDA明显下降,而SOD无明显变化,提示高脂血症与脂质过氧化间有一定关系。     

Effect of streptozotocin on erythrocyte and retinal superoxide dismutase

Summary The Superoxide dismutase (SOD) activity of rat retinae and erythrocytes was decreased by 30–40% from control levels 5 days after the induction of diabetes with streptozotocin. Homogenates prepared from lungs, liver, brains, aortas, kidneys, whole eyes and lens of streptozotocin-diabetic rats showed no change in SOD activity. Treatment with insulin for three days which restored plasma glucose levels close to normal failed to affect retinal SOD activity in diabetic rats. Retinas (rat and bovine) and erythrocytes (human and rat) showed decreased SOD activity followingin vitro incubation with streptozotocin. The need for careful differentiation of drug-induced from diabetes-induced effects in studies of experimental diabetes is reemphasized.     

老年人红细胞膜唾液酸含量与红细胞免疫功能的相关性

目的探讨老年人红细胞膜唾液酸（ＲＢＣｍ－ＳＡ）与红细胞免疫功能的相关性。方法采用Ｂｉａｌｓｃｈｅ试剂法检测ＲＢＣｍ－ＳＡ，Ｆ－８８３６化学比色法检测血浆唾液酸（Ｐ－ＳＡ），红细胞免疫粘附试验观察红细胞Ｃ３ｂ受体花环率（ＲＲＣＦ）。结果老年急性心肌梗死（ＡＭＩ）组和脑梗塞（ＡＣＩ）组的ＲＢＣｍ－ＳＡ分别为３０．８±４．３和３１．３±４．４μｇＮＡＮＡ／ｍｇ膜蛋白，ＲＲＣＦ分别为１６．７％±３．５％和１６．０％±３．６％，均低于老年对照组（Ｐ＜０．０１或０．０５），老年对照组均低于非老年对照组（均为Ｐ＜０．０５）；ＡＭＩ和ＡＣＩ患者的Ｐ－ＳＡ分别为２．４±０．４和２．４±０．３ｍｍｏｌ／Ｌ，均高于老年对照组（均为Ｐ＜０．０５），老年对照组则高于非老年对照组（Ｐ＜０．０５）。老年患者和老年对照组的ＲＢＣｍ－ＳＡ与ＲＲＣＦ均呈正相关，而ＲＢＣｍ－ＳＡ与Ｐ－ＳＡ均呈负相关。结论老年人红细胞Ｃ３ｂ受体花环率降低与ＲＢＣｍ－ＳＡ代谢障碍有关。     

The effects of L-carnitine treatment on left ventricular function and erythrocyte superoxide dismutase activity in patients with ischemic cardiomyopathy

We studied the effects of L-carnitine on left ventricular systolic function and the erythrocyte superoxide dismutase activity in 51 patients with ischemic cardiomyopathy. They all previously were under the treatment of angiotensin-converting enzyme inhibitor, digitalis and diuretics. Patients were randomized into two groups. In group I (n=31), 2 g/day L-carnitine was added to therapy. L-Carnitine was not given to the other 20 patients (Group II). In group I (mean age 64.3+/-7.8 years), 27 of the patients were men, and four were women. In group II (mean age 66.2+/-8.7 years), 17 of the patients were men, and three were women. Twenty age-matched healthy subjects (mean age: 60.1+/-5.3 years) constituted the control group. In each group, left ventricular ejection fraction (LVEF) by echocardiography and red cell superoxide dismutase activity by spectrophotometric method were measured initially and after 1 month of randomisation. Compared with normal healthy subjects (n=20), patients (n=51) had significantly higher red cell SOD activity (5633+/-1225 vs. 3202+/-373 U/g Hb, P<0.001). At the end of 1 month of L-carnitine therapy, red cell SOD activity showed an increase in group I (5918+/-1448 to 7218+/-1917 U/g Hb, P<0.05). In group II, red cell SOD activity showed no significant change after 1 month of randomisation (5190+/-545 to 5234+/-487 U/g Hb, P=0. 256). One month after randomisation there was a significant increase in LVEF in both groups I and II (37.8-42.3%, P<0.001 in group I; 41. 5-43.8%, P<0.001 in group II). The improvement in LVEF was more significant in the L-carnitine group (4.5% vs. 2.3%, P<0.01). We conclude that, as a sign of increased free radical production, superoxide dismutase activity was further increased in patients with L-carnitine treatment. L-Carnitine treatment in combination with other traditional pharmacological therapy might have an additive effect for the improvement of left ventricular function in ischemic cardiomyopathy.     

超氧化物歧化酶对实验性糖尿病的预防及治疗作用观察

用国产牛／猪红细胞超氧化物歧化酶对糖尿病进行干预治疗，以期了解使用抗氧化酶能否影响糖尿病的进程。     

Moderate consumption of red wine, but not gin, decreases erythrocyte superoxide dismutase activity: A randomised cross-over trial

Background and Aims

Several studies have shown that moderate alcohol consumption reduces the risk of coronary heart disease, a disease related to oxidative stress. However, the effects of different alcoholic beverages on antioxidant status are not fully known. Our aim was therefore to compare the effects of a moderate intake of an alcoholic beverage with high polyphenol content (red wine) and another without polyphenol content (gin) on plasma antioxidant vitamins, lipid profile and oxidability of low-density lipoprotein (LDL) particles.

Methods and results

Forty healthy men (mean age, 38 years) were included in a randomised cross-over trial. After a 15-day washout period, subjects received 30 g/ethanol/d as either wine or gin for 28 days. Diet and exercise were monitored. Before and after each intervention, we measured serum vitamins, malondialdehyde (MDA), superoxide dismutase (SOD) and glutathione peroxidase activities, lipid profile, oxidized LDL and LDL resistance to ex-vivo oxidative stress. Compared to gin intervention, wine intake reduced plasma SOD activity [−8.1 U/gHb (95% confidence interval, CI, −138 to −25; P = 0.009)] and MDA levels [−11.9 nmol/L (CI, −21.4 to−2.5; P = 0.020)]. Lag phase time of LDL oxidation analysis also increased 11.0 min (CI, 1.2-20.8; P = 0.032) after wine, compared to gin, whereas no differences were observed between the two interventions in oxidation rate of LDL particles. Peroxide concentration in LDL particles also decreased after wine [−0.18 nmol/mL (CI, −0.3 to−0.08;P = 0.020)], as did plasma oxidized LDL concentrations [−11.0 U/L (CI,−17.3 to −6.1; P = 0.009)].

Conclusion

Compared to gin, red wine intake has greater antioxidant effects, probably due to its high polyphenolic content.     

锰超氧化物歧化酶基因V(16)A多态性与糖尿病肾病的相关性研究

目的探讨锰超氧化物歧化酶(MnSOD)基因V(16)A多态性与糖尿病肾病(DN)的关系。方法应用PCR-RFLP法在昆明地区汉族人中检测97例健康对照者和187例2型糖尿病(T2DM)患者[根据尿白蛋白(UAlb)定量分为DN0(UAlb<30mg/24h)、DN1(30mg/24h≤UAlb<300mg/24h)和DN2(UAlb>300mg/24h)]的MnSOD基因V(16)A多态性,比较各组间基因型分布和等位基因频率。结果DN组(DN1 DN2)VV基因型和V等位基因频率显著高于不伴肾病的DN0组(P<0·05)。MnSOD基因多态性与DN显著相关。结论MnSOD基因V(16)A多态性是中国昆明地区汉族T2DM发生DN的遗传危险因素。     

针刺与依达拉奉联合治疗对急性脑梗死患者神经功能及自由基的影响研究

目的观察依达拉奉联合早期针刺治疗对急性脑梗死患者神经功能及自由基的影响。方法急性脑梗死96例发病1h￣72h内就诊,头颅CT证实,梗死灶体积≤10cm3,并排除脑梗死性出血。将患者随机分为依达拉奉治疗组、针刺治疗组、依达拉奉和针刺联合治疗组和对照组各24例,治疗组给予依达拉奉和/或针刺治疗,对照组予以复方丹参注射液。并在治疗前、疗后14天进行神经功能缺损评分、血清超氧化物歧化酶(superoxide dismutase,SOD)和丙二醛(malondiadehyde,MDA)的测定。结果治疗后治疗组尤其是依达拉奉和针刺联合治疗组神经功能缺损评分(9.62±2.50)与对照组(20.07±2.87)比较差异有非常显著性意义(P<0.05)。血清SOD活性明显升高,MDA水平显著下降(P<0.05),未发现明显副作用。结论依达拉奉是治疗急性脑梗死的一种安全有效的药物,其机制可能与清除自由基等作用有关,加用针刺治疗具有协同作用。     

老年脑血管病患者红细胞膜流动性改变及影响因素的研究

本文作者应用荧光偏振法测定老年脑血管病患者红细胞膜流动性，观察血浆、红细胞膜过氧化脂质（ＬＰＯ）含量、血脂对红细胞膜流动性的影响。结果表明，老年脑血管病患者红细胞微粘度增加，膜流动性降低，与以照组比较有显著差异。相关分析结果表明，红细胞微粘度与血浆、红细胞膜ＬＰＯ呈正相关；与血清胆固醇、甘油三酯、ＨＤＬ－Ｃ无相关，提示在脑血管病患者，氧自由基是损伤红细胞膜流动性的因素之一，应用抗自由基药物有保护红     

Age-dependent increases in interstitial collagenase and MAP Kinase levels are exacerbated by superoxide dismutase deficiencies

Many age-associated degenerative diseases commonly involve degradation of the extracellular matrix and aberrant matrix metalloproteinase-1 (MMP-1) expression. In diverse cell lines MMP-1 or interstitial collagenase (CL) expression is tightly regulated through a network of signals involving reactive oxygen species (ROS). However, whether the in vivo age-associated increase in CL expression is also sensitive to ROS-mediated signaling has not been established. To evaluate the contribution of ROS to the age-dependent increase in CL we monitored the levels of murine CL in two well-established models of oxidant stress. Analysis of murine CL levels in mice deficient in either of the intracellular superoxide dismutases (Sod2^+/− or Sod1^−/−) revealed its age- and redox-dependent expression relative to WT controls. Both age- and redox-dependent increases in murine CL expression were associated with elevations in phosphorylation of the MAP Kinases, Erk, JNK and p38. CL expression was highest in renal and skeletal muscle tissue from the aged Sod1^−/− mice and was associated with a decrease in collagen staining. These findings suggest that MAPK signaling and CL production are both age- and redox-responsive. The redox sensitivity of age-associated CL expression suggests that degenerative disease associated with aberrant matrix remodeling and oxidant stress may be amenable to antioxidant-based therapies.