HIV/AIDS患者机体氧化还原态与CD4细胞计数相关性分析

目的:探讨HIV/AIDS患者机体氧化还原态与CD4细胞计数的相关性。方法:采用流式细胞仪检测CD4+和CD8+计数,计算CD4+/CD8+比值。将患者分为AIDS组(54例)和HIV感染组(26例),正常体检者为对照组(30例)。取静脉血,测血还原型谷胱甘肽(GSH)与氧化型谷胱甘肽(GSSG),NADPH与NADP+,以GSH/GSSG、NADPH/NADP+比值表示患者机体氧化还原态,分析氧化还原态与CD4细胞计数的相关性。结果:HIV/AIDS患者血CD4细胞计数及CD4+/CD8+比值均随机体氧化还原态向氧化方向偏移而减少。结论:AIDS/HIV患者机体氧化还原态越向氧化方向偏移,标志着AIDS患者病情进展。     

两种结核抗体检测方法对结核病的诊断价值

目的研究结核蛋白芯片技术、ELISA法检测结核抗体对诊断结核病的价值。方法选取141例结核病患者、52例非结核病患者进行结核蛋白芯片、ELISA法检测结核抗体的表达。结果结核蛋白芯片检测在结核病组表达的阳性率为52.48%,在非结核病组的阳性率为13.46%,差别有统计学意义（P〈0.05）;ELISA检测在结核病组的阳性率为48.23%,在非结核病组的阳性率为21.15%,两组表达差异有统计学意义（P〈0.05）。两种方法联合检测阳性率为81.56%。结论两种检测方法对结核病的诊断均有一定价值,在肺结核患者中检测的阳性率高于非肺结核患者。两种方法联合检测能提高检测的阳性率、敏感度。     

哺乳妇女停止喂奶后补充碳酸钙其骨骼骨密度未见明显的干预效果

目的观察哺乳妇女骨骼骨密度的自我恢复状况,以及补充碳酸钙后对其骨骼骨密度的干预效果。方法以湖北省武汉市郊区农村的120名健康哺乳期妇女为研究对象,随机分为两组:一组为补钙组(每日600 mg钙,碳酸钙),另一组为对照组,各60名。断奶时,使用双能X线吸收骨密度测定仪测量母亲腰椎和左髋等局部骨骼基线骨密度,并通过3d、24 h的膳食调查计算其平均每日钙摄入量,随即补钙(补钙组)或给予安慰剂(对照组),1年后再次测定相同部位的骨密度。结果无论补钙组还是对照组,1年后研究对象腰椎和左髋的骨密度显著增加(P<0.05)。补钙组与对照组之间比较,无论局部骨骼的骨密度还是骨转换指标差异均无统计学意义(P>0.05)。结论尽管我国产妇日摄入钙量较少,停止喂奶后1年内其腰椎和左髋骨密度仍明显增加;补充碳酸钙没有明显的干预效果。     

Protective effect of grape seed proanthocyanidins against cholesterol cholic acid diet-induced hypercholesterolemia in rats

BackgroundDietary cholesterol plays an important role in the development of atherogenesis and cardiovascular diseases. We explored the prospective effect of grape seed proanthocyanidins in controlling hypercholesterolemia induced oxidative injury and apoptosis in atherogenic animals.MethodsFour groups of male Wistar rats (250–300 g) were used for the study. Group I served as control and received vehicle (saline) alone, Group II served as the induction group fed with a high-cholesterol diet (rat chow supplemented with 4% cholesterol and 1% cholic acid—CC diet) for 30 days, Group III served as drug control and was treated with grape seed proanthocyanidins (100 mg/kg body weight) orally for 30 days, and Group IV animals were fed with CC diet for 30 days along with grape seed proanthocyanidins (100 mg/kg body weight) orally.ResultsCC diet induced an abnormal increase in lipid peroxidation, tissue cholesterol, triglyceride, serum low-density lipoprotein, and very low density lipoprotein, and decreased the high-density lipoprotein concentration. Altered activity of cardiac and serum creatine kinase, accompanied by a decreased cardiac enzymatic and nonenzymatic antioxidant defense system and an increase in the expression of cytochrome c and caspases-3, was observed in CC diet-fed rats. These changes were partially restored in the grape seed proanthocyanidin-treated group.ConclusionGrape seed proanthocyanidins have cardioprotective effects against CC diet-induced hypercholesterolemia via their ability to reduce, directly or indirectly, free radicals in the myocardium.     

ERCC1 Asn118Asn polymorphism as predictor for cancer response to oxaliplatin-based chemotherapy in patients with advanced colorectal cancer

Objective: To assess whether the polymorphism of ERCC1 Asn118Asn (C→T) had effects on cancer response to chemotherapy and outcome in Chinese patients treated with oxaliplatin as first-line chemotherapy regimen for advanced colorectal cancer.Methods: ERCC1 Asn118Asn polymorphism was analyzed in 99 patients with stages Ⅲ and Ⅳ advanced colorectal cancer treated with oxaliplatin-based chemotherapy.For all of the patients, ERCC1 Asn118Asn genotype was analyzed for associations with treatment response and time to disease progress (TTP).Results: The allele frequencies of the ERCC1 gene codon 118 were C/C 50.51% (50/99), C/T 41.41% (41/99), T/T 8.08% (8/99), respectively.Patients with C/C genotype showed higher response rate than those with C/T T/T (OR = 3.764, 95% CI: 1.310-10.813).The median TTP of all patients was 7 months (95% CI: 5.569-8.431).Patients with C/C genotype showed a median TTP of 10 months (95% CI:8.924-11.076), which was longer than 5 months (95% CI: 4.424-5.576) in patients with C/T T/T genotypes.Conclusion:Our results showed a link between ERCC1 Asn118Asn genetic polymorphism and cancer response to oxaliplatin-based chemotherapy and time to disease progress in Chinese patients with advanced colorectal cancer.ERCC1 Asn118Asn genotyping may be of predictive benefit in selecting treatment regimen for advanced colorectal cancer.     

甲氨蝶呤联合米非司酮治疗非破裂型输卵管妊娠32例报告

目的探讨甲氨蝶呤（MTX）联合米非司酮治疗非破裂输卵管妊娠的效果。方法随机选取32例非破裂型输卵管妊娠患者采用米非司酮300mg一次顿服，MTX20mg静脉滴注5d。另选32例单用MTX的患者设为对照组。结果MTX联合米非司酮治疗的成功率为87．5％，明显高于对照组。观察治疗期间病情变化，发现疗效与血13-hCG高低及有无心管搏动有关。结论MTX联合米非司酮治疗非破裂型输卵管妊娠安全有效，适用于生命体征平稳、无剧烈腹痛、无心管搏动及血β-hCG〈2000IU／l的非破裂型输卵管妊娠。     

通心络胶囊预防垂体后叶素致实验性大鼠急性心肌缺血的研究

目的:研究通心络胶囊对垂体后叶素致实验性大鼠急性心肌缺血的预防作用。方法:对40只大鼠随机分成正常对照组、模型组、硝酸甘油组和通心络胶囊组,采用大鼠腹腔注射垂体后叶素建立急性心肌缺血模型,观察各给药组注射垂体后叶素后心电图ST段变化以及血清乳酸脱氢酶(LDH)、肌酸磷酸激酶同工酶(CK-MB)、肌钙蛋白I(TnI)、肌红蛋白(Myo)、超氧化物歧化酶(SOD)活性和丙二醛(MDA)等指标。结果:硝酸甘油组和通心络胶囊组能明显影响急性心肌缺血的心电图变化,抑制CK-MB、TnI、Myo的升高,提高血清SOD活性、降低MDA含量。结论:通心络胶囊能改善垂体后叶素致实验性大鼠急性心肌缺血的作用。     

大豆蛋白体外酶解物中血管紧张素转化酶抑制剂活性肽研究

目的:体外模仿部分胃肠道消化酶解过程,考察大豆蛋白酶解消化能否产生血管紧张素转化酶抑制剂(ACEI)活性肽及其活性状况,以揭示大豆蛋白体内消化酶解与ACEI的活性关系。方法:模拟人体胃肠道消化过程,以胃蛋白酶结合胰蛋白酶,相继酶解大豆分离蛋白(SPI),经色谱分离,动态检测不同阶段ACEI肽片段及其活性大小。结果:胃蛋白酶酶解过程前20min内,酶解液ACEI活性达到最高点,随后在胰蛋白酶酶解阶段其抑制活性下降。180min后的酶解产物,其半抑制活性浓度IC50值为0.28±0.06 mg/ml。同时,未经酶解的SPI液在0.73mg/ml时无ACEI活性。SPI酶解液经各种色谱分离后的组分,其IC50值从0.13±0.03到0.93±0.08 mg/ml。低分子量和伴有疏水性基团的肽类最具ACE抑制活性。结论:体外模仿胃肠消化过程使用胃蛋白酶和胰蛋白酶酶解SPI可产生不同ACEI活性的肽片段,说明人体正常摄食消化大豆蛋白可产生血管紧张素转化酶抑制剂活性肽。     

HPLC法测定脉君安片中氢氯噻嗪的含量

目的:采用HPLC法测定脉君安片中氢氯噻嗪的含量;方法:Kromasil C_(18)柱(200 mm×4.6 mm,5μm),流动相为甲醇-水(15:85).检测波长:226 nm,流速为1.0 ml·min~(-1)。结果:氢氯噻嗪的线性范围为0.097～1.94μg,r=0.999 8,平均回收率102.0%,RSD=1.9%(n=6)。结论:本方法快速简便,准确可靠,可用于脉君安的质量控制。     

NF-κB与肿瘤相关性的研究进展

NF-κB是广泛存在于哺乳动物中的转录因子，其在控制细胞增殖、凋亡以及肿瘤的发生、发展等问题上均起着重要的作用。因此，深入探讨NF—κB在体内的活化机制以及其与肿瘤之间的关系具有重要的意义。本文对NF—κB的组成、结构、激活途径以及与肿瘤的关系作一简要综述。