预处理对O3衰老模型超氧化物歧化酶活性的影响

为了确定预处理对小鼠Ｏ３致衰老模型是否具有保护作用,本研究利用ＳＯＤ微量快速测定方法,检测和分析了经云南花粉田七口服液预处理后小怀血和心肌中超氧化物歧化酶活性,结果显示：,预处理实验组ＳＯＤ活性明显高于空白姐和阳性对照组,同时,空白姐与阳性对照组之间无显著性差异。这表明：ＹＮ－ＰＴＯＬ预处理改善或提高Ｏ３致老小展开机体内ＳＯＤ活性,是一种有应用前景的延缓衰老的保健药物。     

YN-PTOL对O_3衰老模型自由基损伤的保护作用

本研究通过建立的臭氧（Ｏ３）致衰老的小鼠模型,采用改良硫代巴比妥酸荧光法,观察了云南花粉田七口服液（ＹｕｎＮａｎ Ｐｏｌｌｅｎ Ｔｉｅｎｃｈｉ Ｏｒａｌ Ｌｉｑｕｉｄ,简称 ＹＮ－ＰＴＯＬ）预处理对血浆和心肌中脂质过氧化物（Ｌｉｐｉｄ 　Ｐｅｒｏｘｉｄｅ, ＬＰＯ）含量的影响。结果表明：预处理实验组ＬＰＯ含量明显低于空白对照组和阳性对照组（Ｐ＜０．０５）,但空白对照组与阳性对照组相比,差别无显著性意义（Ｐ＞０．０５）。这表明：ＹＮ－ＰＴＯＬ预处理对Ｏ_3致衰老小鼠模型的自由基损伤具有明显保护作用,是一种预防与治疗 Ｏ３损伤的有效药物。     

YN—PTOL对O3衰老模型自由基损伤的保护作用

本研究通过建立的臭氧（Ｏ３）致衰老的小鼠模型,采用改良硫代巴比妥酸荧光法,了云南花粉田七口服液（Ｙｕｎ Ｎａｎ Ｐｏｌｌｅｎ Ｔｉｅｎｃｈｉ Ｏｒａｌ Ｌｉｑｕｉｄ,简称ＹＮ－ＰＴＯＬ）预处理对血浆和心肌中脂质过氧化物（Ｌｉｐｉｄ Ｐｅｒｏｘｉｄｅ,ＬＰＯ）含量的影响。结果表明,预处理实验组ＬＰＯ含量明显低于空白对照组和阻性对照组（Ｐ〈０．０５）,但突白对照组与阳性对照组相比,差别无显著性意义（Ｐ     

极谱氧传感仪测定SOD快速诊断先天愚型及其产前诊断的研究

应用极谱氧传感检测仪，测定红细胞中的ＳＯＤ活性来鉴定Ｄｏｗｎ＇ｓ，探索替代传统的染色体诊断方法。本文检测６２例健康人红细胞的ＳＯＤ为６９３５±４８７ｕ／ｍｌ，３２例Ｄｏｗｎ＇ｓ红细胞的ＳＯＤ为１０６０２±８２９ｕ／ｍｌ。而检测４８例健康新生儿红细胞的ＳＯＤ为５６２７±４６３ｕ／ｍｌ，３６例健康胎儿红细胞的ＳＯＤ为５７０７±４７５ｕ／ｍｌ，５例Ｄｏｗｎ＇ｓ新生儿红细胞的ＳＯＤ为８３０７±２２９ｕ／ｍｌ。研究结果显示Ｄｏｗｎ＇ｓ比健康人的红细胞ＳＯＤ高１．５倍，两者具有显著性差异。本方法检测快速，只需５０分钟，灵敏度高，操作简便，具有实用推广价值。     

输精管结扎4月大鼠血清与前列腺组织的前列腺酸性磷酸酶活力变化

成年Ｗｉｓｔａｒ大鼠２０只，随机分为输精管结扎组（ＶＧ）和假手术组（ＳＯＧ）。术后第４个月检测了前列腺酸性磷酸酶（ＰＡＰ）等代表前列腺功能与肿瘤标志的酶学指标。结果表明，（１）血清ＰＡＰ活力，ＶＧ为４．９６±３．４Ｕ／ｍｌ，ＳＯＧ为５．６３±１．６９Ｕ／ｍｌ，两组无显著差异（Ｐ＞０．０５）；ＶＧ前列腺组织ＰＡＰ活力（１８．００±８．８１Ｕ／ｇ）略高于ＳＯＧ的（１５．０４±１１．９０Ｕ／ｇ），但无显著性。Ｐ／Ｔ百分比值ＶＧ为６５．０２±２５．３６％，ＳＯＧ为６８．６５±１１．６５％，Ｐ大于０．０５。（２）血清与前列腺组织碱性磷酸酶（ＡＬＰ）、乳酸脱氢酶（ＬＤＨ）与磷酸肌酸激酶（ＣＫ）活力，两组均无显著差异（Ｐ＞０．０５）。     

转移因子和免疫核糖核酸对LAK细胞抗肿瘤活性的影响

本研究用重组白细胞介素２（ｒＩＬ－２）联合转移因子（ＴＦ）或抗肿瘤免疫核糖核酸（ｉＲＮＡ）作用于外周血单个核细胞（ＰＢＭＣ），测定其对Ｋ５６２，Ｒａｊｉ及Ｈ７４０４细胞的杀伤活性。结果发现，高浓度ＴＦ（０．２５ｕ／ｍｌ）可抑制ＬＡＫ活性，ＴＦ进一步稀释（０．１２５ｕ／ｍｌ）可使其抑制作用消失。ＴＦ和抗肿瘤ｉＲＮＡ不能进一步提高最适剂量ｒＩＬ－２（５００ｕ／ｍｌ）诱导的ＬＡＫ活性，但能显著增强亚适剂量ｒＩＬ－２（２００ｕ／ｍｌ）诱导的ＬＡＫ活性，诱导ＬＡＫ活性增高的ＴＦ最适剂量为０．０３１ｕ／ｍｌ。ＴＦ或抗肿瘤ｉＲＮＡ单独不能诱导出ＬＡＫ活性，而当两者联合应用可诱导ＰＢＭＣ产生ＬＡＫ活性。本文为ＴＦ及抗肿瘤ｉＲＮＡ协同ＬＡＫ细胞疗法在临床应用提供实验基础。     

缺血－再灌注损伤与高空减压病

５例延迟性Ⅱ型高空减压病（ＤＣＳ）血铜锌超氧化物歧化酶（Ｃｕ－ＺｎＳＯＤ）测定结果，平均３１０．２ｎｇ／ｍｌ，较低者分别为２０５、２３１和２５０ｎｇ／ｍｌ。对照组平均３８５．６ｎｇ／ｍｌ，较低者分别为３３０、３４０和３６６ｎｇ／ｍｌ。经Ｘ２检验，患者组明显低于对照组（Ｔ＝６．１６５，Ｐ＜０．０１），治疗后１个月患者组血ＳＯＤ恢复正常。表明ＤＣＳ与缺血－再灌注损伤有一定联系．     

荷人鼻咽癌裸鼠血清丙二醛,自然杀伤细胞活性以及中药“癌…

本实验用ＢＡＬＢ／ｃ裸小鼠复制人ＮＰＣ模型，检测荷人ＮＰＣ裸鼠血清ＭＤＡ和脾ＮＫ活性，以探讨瘤宿主ＮＫ活性改变的原因和可能机理，观察中药“癌克星”制剂对ＮＰＣ的抑瘤作用及对ＭＤＡ含量和脾ＮＫ活性等的影响；以探讨其抑瘤机理。结果发现荷人ＮＰＣ裸鼠血清ＭＤＡ含量（３７．９２±５．３６ｎｍｏｌ／ｍｌ）明显高于正常裸鼠（１３．９０±１．６３ｎｍｏｌ／ｍｌ）（Ｐ＜０．０１），而脾ＮＫ活性（４０．９３±２．３     

我国青年螨性过敏的调查

对全国２７个行政区入学新生１５０８人、年龄１８～３０岁，男性８０２人，女性７０６人，进行螨性过敏调查。４．４４％（６７人）有不同过敏史，与螨有关的哮喘０．４％、鼻炎１．３３％、１４．１９％（２１４人）具粉尘螨皮肤挑刺试验（ＳＰＴ）反应，男女间无显著性差别，但地区上ＳＰＴ反应率出现由北向南上升的趋势；有过敏史织ＳＰＴ反应率极其显著的高于无过敏史组（Ｐ＜０．００１）。血清总ＩｇＥ（ｔＩｇＥ）的测定平均值４９．７６ＩＵ／ｍｌ（０．３２～２．７６×１０＿（２２）ＩＵ／ｍｌ），男性６４．２５ＩＵ／ｍｌ，女性３７．２２ＩＵ／ｍｌ（Ｐ＜０．０１）；有ＳＰＴ反应人群的ｔＩｇＥ值７０．２３ＩＵ／ｍｌ，无ＳＴＰ反应人群的ｔＩｇＥ值４７．００ＩＵ／ｍｌ（Ｐ＜０．０１）；不同ＳＰＴ反应强度组的ｔＩｇＥ值以及个同地区的青年ｔＩｇＥ值都无显著性差别（Ｐ＞０．０５）。粉尘螨特异性ＩｇＥ（ｓＩｇＥ）的测定阳性者４８６人（３２．２３％）。其中８７人具有ＳＰＴ反应，阴性１０２２人中仅１２７人具有ＳＰＴ反应（Ｐ＜０．０１）。ｓＩｇＥ阳性人群的ｔＩｇＥ为８７．０６ＩＵ／ｍｌ。ｓｌｇＥ阴性人群的ｔＩｇＥ值３８．１４ＩＵ／ｍｌ（Ｐ＜０．００１）。在ｓ     

荷人鼻咽癌裸鼠血清丙二醛、自然杀伤细胞活性以及中药＂癌克星＂的影响

本实验用ＢＡＬＢ／ｃ裸小鼠复制人ＮＰＣ模型，检测荷人ＮＰＣ裸鼠血清ＭＤＡ和脾ＮＫ活性，以探讨瘤宿主ＮＫ活性改变的原因和可能机理，观察中药“癌克星”制剂对ＮＰＣ的抑瘤作用及对ＭＤＡ含量和脾ＮＫ活性等的影响；以探讨其抑瘤机理。结果发现荷人ＮＰＣ裸鼠血清ＭＤＡ含量（３７．９２±５．３６ｎｍｏｌ／ｍｌ）明显高于正常裸鼠（１３．９０±１．６３ｎｍｏｌ／ｍｌ）（Ｐ＜０．０１），而脾ＮＫ活性（４０．９３±２．３９）则明显低于正常裸鼠（６７．０９±６．２８）（Ｐ＜０．０１）。中药“癌克星”制剂对荷瘤鼠具明显抑瘤作用，抑瘤率２５．８５～９９．９９％；并可降低荷瘤鼠血清ＭＤＡ含量，部分提高ＮＫ活性，增加瘤组织单核细胞的浸润。本实验提示，ＦＲ可能作为免疫抑制因子之一，使ＮＫ活性下降。“癌克星”对ＮＰＣ具明显抑癌效应，其抑瘤作用可能是通过降低瘤宿主体内ＦＲ，提高机体免疫功能而实现。     

Role of oxygen free radicals in the induction of sister chromatid exchanges by cigarette smoke

Cigarette smoke has been reported to contain free radicals and free radical generators in both the gas and particulate phases. Studies in our laboratory have shown that both cigarette smoke condensate (CSC) and smoke bubbled through phosphate buffered saline solution (smoke-PBS) increased sister chromatid exchanges (SCE) in Chinese hamster ovary cells in a dose-dependent manner. Since oxygen free radicals have been shown to cause SCEs and other chromosomal damage, we investigated the role of these radicals in the induction of SCEs by CSC and smoke-PBS. Addition of the antioxidant enzymes catalase and superoxide dismutase or the oxygen-radical scavenger ascorbic acid failed to reduce the SCE frequency in the presence of either CSC or smoke-PBS. Additional studies indicated that the quantity of hydrogen peroxide produced in CSC or smoke-PBS is too small to account for the observed SCE induction. It appears, therefore, that SCE induction by CSC or smoke-PBS does not involve the participation of oxygen free radicals.     

A Study on Four Antioxidation Effects of Lycium Barbarum Polysaccharides In Vitro

The objective of the study was to investigate the in vitro antioxidation activity of lycium barbarum polysaccharides (LBP). Ultraviolet spectrophotometry was adopted to determine the capability of LBP to clear superoxide anions, hydroxyl radicals, DPPH free radicals and ABTS free radicals. The result showed that the law for LBP to clear superoxide anions, hydroxyl radicals and DPPH free radicals was that the clearance rate increased gradually with the increase of the concentration, and when the concentration reached a certain value, the clearance rate leveled off, while the IC₅₀ for clearing ABTS free radicals was 47.158±6.231 µg/ml. The study concluded that LBP is a good in vitro antioxidant.     

单甲氧基聚乙二醇—超氧化物歧化酶减轻低氧对兔心肌超微结构损伤

用雄性日本大耳兔（２．５￣３ｋｇ）每组５￣１２只，除常氧对照组外，其余各组分别模拟海拔高度５０００ｍ低压性低氧２４ｈ，左右心室肌超微结构损伤明显，主要表现为线粒体膜破损，嵴部分消的。肌丝间隙增大，肌原纤维断裂。溶酶体增多，糖原颗粒减少，氏氧前由股静脉注入单甲氧基聚乙二醇－超氧化物歧化酶的兔，肌原纤维排列整齐。线粒体含量丰富嵴密集，与肌原纤维基本呈平行。另测定低氧不同时间左右心室肌超氧化物歧化酶活性     

Role of free nitrogen and oxygen radicals in the pathogenesis of lipopolysaccharide-induced endotoxemia

We studied molecular mechanisms of changes in oxidative metabolism under conditions of experimental lipopolysaccharide-induced endotoxemia. Generation of reactive nitrogen and oxygen species in mice increased 18 h after treatment with lipopolysaccharide. These changes contributed to inactivation of enzymes and enzyme complexes (ribonucleotide reductase, NADH-ubiquinone oxidoreductase, and cytochrome c oxidase), dysfunction of the mitochondrial electron transport chain, and development of oxidative stress. Plaferon LB protected mice from the toxic effect of lipopolysaccharide. __________ Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 141, No. 2, pp. 172–176, February, 2006     

雄激素对自由基损伤后海马神经元的保护作用

目的:探讨雄激素对培养大鼠海马神经元自由基损伤后的神经保护作用.方法:取新生大鼠进行海马神经元培养,用不同浓度的H_2O_2造成海马神经元的损伤模型,观察细胞的活力并测量超氧化物歧化酶(SOD)值,一氧化氮(NO)及丙二醛(MDA)的含量,预先给予睾酮后(24h)观察细胞的活力及SOD值,NO及MDA的含量变化,同时观察不同时间给予睾酮后细胞的活力.结果:给予H_2O_2后,神经元的活力明显下降,预先进行睾酮培养后细胞的活力明显升高,NO和MDA的生成降低,SOD值升高,睾酮给予后短时间内可以引起神经保护作用.结论:雄激素对H_2O_2造成的神经元损伤具有明显的保护作用,发挥作用为短时间的作用模式,可能与自由基引起的凋亡相关.     

脑缺血/再灌注致神经元退行性变进程中自由基水平和SOD2表达相关

 目的 探讨脑缺血/再灌注(I/R)致神经元退行性变所涉及的自由基和SOD2表达的时程变化及其相互关系。方法 抽取并回输约40%总血量加双侧颈总动脉夹闭20 min建立I/R损伤模型。组织学检测神经元损伤;Morris水迷宫检测学习记忆能力;分光光度计法检测SOD2活性和丙二醛(MDA)含量;Western blot检测SOD2蛋白表达。结果 与假手术组相比,I/R组小鼠学习记忆能力显著降低,海马MDA含量进行性显著升高（P<0.05）;I/R术后5、15、30和60 d组海马SOD2活性（14.69+2.49 U/mg.pro,14.15+2.41 U/mg.pro,15.07+2.67 U/mg.pro,15.55+2.64 U/mg.pro）和蛋白表达（9.20+1.23,5.40+1.03,4.90+0.92,5.60+0.59）均显著低于假手术组（P<0.05）;海马出现进行性神经元核固缩加重和神经元丢失。结论 I/R致小鼠神经元退行性变与SOD2蛋白表达和活性保持低水平状态而氧化应激进行性增强有关。     

Effect of spontaneous exercise on antioxidant capacity in rat muscles determined by electron spin resonance

Aims: The effect of physical activity on antioxidant capacity in muscle remains unknown. This study investigated the effect of spontaneous exercise on antioxidant capacity in rat muscles determined by electron spin resonance (ESR), which is a technique for the direct detection of free radicals. Methods: Ten‐week‐old male Wistar rats were housed individually in cages with a running wheel. Rats were classified as high activity (HA), middle activity (MA) or low activity group (LA), based on an assessment of running distance covered over a 23‐week period. After 23 weeks of housing, soleus (Sol), plantaris (Pl), gastrocnemius [deep/surface portions (GasD/GasS)] and heart (Hrt) muscles were isolated, and scavenging activity against superoxide anions () and hydroxyl radicals (HO^·) was determined by ESR using a spin‐trap chemical. The citrate synthase (CS) activity was used as a marker of mitochondrial oxidative phosphorylation capacity. Results: Among the parameters measured, only scavenging activity in GasD significantly correlated with the running distance. The highest scavenging activity was observed in Hrt of HA rats. The scavenging activity in Pl of MA rats was significantly higher than that of LA rats. The scavenging activity of Sol and GasS was not significantly different between the three groups. Furthermore, the HO^· scavenging activity of any muscle specimens was similar among the three groups and did not correlate with running distance at all. CS activity did not significantly differ between the three groups. Conclusion: These data suggest that scavenging activity in specific types of muscle tissues would increase especially in spontaneously active animals. However, HO^· scavenging activity would not.