Additive effects of earthworm extract with HpD-laser on the enhancement of reactive oxygen production and the inhibition of[~3H]—thymidine.uptake in mouse ascitic tumor cells

The effects of combined use of earthworm extract(912)and HpD-laser on the produc-tion of reactive oxygen and the biosynthesis of DNA in S_(180) tumor cells were studied throughchemiluminescence measurement and[~3H]-TdR incorporation assay.The results showed that as com-pared with the control,the intensity of chemiluminescence emitted by tumor cells treatedsimultaneously with 912 and HpD-laser was enhanced more than ten-folds,while that treated with912 or HpD-laser alone was increased only 2～4 folds.The[~3H]-TdR incorporation into tumorcells of the former group was inhibited upto 74.1%,and that of the latter groups decreased onlyby 42.2% and 40.0%,respectively.In accordance with these biochemical changes,the ultrastructuraldamage of tumor cells of the former,combinedly treated group appeared to be the most serious.This suggests an additive effect of 912 with HpD-laser on tumor cells.In addition,if free radicalscavengers,such as catalase and superoxide dismutase,were added to the reaction systembefore chemiluminescence assay,the luminescent enhancement effect mentioned above was dramaticallyalleviated,implying the presence of O_2~ and H_2O_2 in the system.Therefore,as to the toxic effecton tumor cells,912 and HpD-laser are not only additive in efficiency,but also similar in theunderlying mechanism of action.     

(E)-1-二苯甲基-4-[3-(3,4-二羟苯基)-2-丙烯基]哌嗪(Ⅰ)的合成及其SOD样活性测定

目的和方法：为了研究心血管类药物的构效关系，用二苯甲基哌嗪和咖啡酸为原料，经缩合、还原等反应制得标题物（Ｉ）；并通过黄嘌呤黄嘌呤氧化酶鲁米诺化学发光体系检测了其清除Ｏ·２自由基的作用．结果和结论：经元素分析、红外光谱和核磁共振谱测定，合成物（Ｉ）与结构相符，收率７２．５％；化学发光法检测显示出较强的ＳＯＤ样活性，具有较强的抗自由基作用．     

胃癌细胞选择性阿霉素免疫脂质体的制备及其特性

免疫脂质体(immunoliposome)系脂质体与特异性抗体连接而成,具有普通脂质体和导向药物二者的优点。其中的药物活性保持好,携药量大,并能与靶细胞多价结合,因而在肿瘤导向治疗领域日益受到重视。 作者采用本室制备的胃癌单克隆抗体MGb_2经NHSP修饰引入软脂酸,逆相蒸发法制备脂质体,同时包入阿霉素(adriamycin)。用去氧胆酸透析法将修饰抗体插到阿霉素脂质体表面,经过Scpharose 4B柱层析纯化得到免疫脂质体。同     

一氧化氮对人胚胎神经干细胞增殖的抑制作用

目的:探讨外源性一氧化氮(NO)对人胚胎神经干细胞(NSCs)增殖的抑制作用.方法:取4月龄(±15d)正常孕妇引产胎儿大脑皮质组织分离代NSCs,免疫荧光化学法鉴定.培养基中加入不同浓度的硝普钠后,Griess还原法检测培养液中NO氧化产物的含量;MTT法测定细胞活力.结果:加入不同浓度硝普钠24h后,培养液中NO氧化产物的含量随硝普钠浓度的增高而增加,且显著高于对照组.MTT法显示经硝普钠作用后的NSCs活细胞数较对照组明显减少,并呈浓度相关性;在去除硝普钠后继续培养的NSCs仍可保持增殖能力.结论:外源性NO对培养状态下的人胚胎NSCs增殖有抑制作用.     

血浆同型半胱氨酸水平及临床诊断意义

同型半胱氨酸血症与许多疾病有关,血中tHcy升高可致流产、新生儿缺陷直至中风、老年性痴呆及其它老年性疾病如骨质疏松及老视,尤其被认为tHcy升高是冠心病的一个独立危险因素,而高同型半胱氨酸血症可能与同型半胱氨酸代谢有关的酶和维生素缺乏有关.作者就同型半胱氨酸的代谢、血浆中同型半胱氨酸水平及在临床诊断中的意义进行综述.     

考马斯亮蓝微盘比色法测定蛋白质含量

目的 建立快速、灵敏的测定蛋白质的方法。方法 以考马斯亮蓝作为显色剂,用酶联免疫测定仪微盘比色测定牛血清白蛋白和小鼠肝组织匀浆的蛋白含量,并与常量比色法进行了比较,结果 考马斯亮蓝微盘比色法与常量法相比,对样品的测定结果相近,而前者样品用量少（只需几微升）,简便、快速、检测极限低（0.63ug)。结论 考马斯亮蓝微盘比色法是一种简单、快速、灵敏的蛋白质测定方法,尤其适用于大批量、微量样品的蛋白质含量测定。     

NADPH氧化酶源性ROS在乳鼠心肌细胞肥大中的作用

目的探讨NADPH氧化酶来源的活性氧(ROS)在TNF-α诱导乳鼠心肌细胞肥大中的作用。方法采用体外乳鼠心肌细胞培养,给予TNF-α、APO单独或联合作用细胞24h,以BCA法测定心肌细胞蛋白合成,共聚焦显微镜测量心肌细胞ROS含量,RT-PCR法测定心肌细胞心钠素ANP mRNA的表达。结果 TNF-α可明显增加心肌细胞蛋白合成,心肌细胞体积增大,ROS生成增多,ANP mRNA表达水平显著增加,以上作用可被APO明显抑制。结论TNF-α通过增加心肌细胞NADPH氧化酶来源的ROS生成,促进心肌细胞肥大。     

抗氧化剂药膜对烧伤后继发性损伤的影响

抗氧化剂药膜对烧伤后继发性损伤的影响孙淑芬莫简王多宁骆文博施炯苏映军王吉村郭正仁刘健贺诗华林英华烧伤后继发性氧化损伤可能与自由基介导的脂质过氧化有关，超量自由基引起的氧化应激反应具有细胞毒作用，使创面进一步加深，会影响创面的愈合。这一过程一般发生在烧...     

Protection of retina from lipid peroxidation with super''''oxide dismutase

Our previous experiments demonstrated the occurrence of retinal lipidperioxidation following vitreous hemorrhage.In the present study,0.2ml ofautologous whole blood was injected into the vitreous of both eyes in rabbits.One eye of each rabbit received an additional injection of 0.2ml of superoxidedismutase (SOD,794 U);the other eye served as a control.The malondialdehyde(MDA) in the retina was assayed with fluorescence spectrophotometry.The resultsshowed that the MDA was significantly lower in eyes injected with SOD (0.047±0.010 nmol/mg) than in control eyes (0.096±0.011 nmol/mg,P<0.05) 10d afterinjection.Ultrastructural examination revealed that the photoreceptor cells of theeyes with SOD injection were relatively normal.It is suggested that SOD can pro-tect the retina from lipid peroxidation.     

化学发光法测定两种铜（Ⅱ）配合物歧化超氧阴离子的活性

化学发光法测定两种铜（Ⅱ）配合物歧化超氧阴离子的活性王多宁，莫简，赵喜荣，孙淑芬，郭正仁（化学教研室西安７１００３３）关键词化学发光；配合物；超氧阴离子中图号Ｏ６５７．３９自１９６９年ＭｃＣｏｒｄ等人发现超氧化物歧化酶（ＳＯＤ）以来，国内外都从提取方...