斯氏狸殖吸虫成虫尿素溶解性抗原蛋白组成及活性成份

采用8M尿素和简化方法分离、提取斯氏狸殖吸虫成虫尿素溶解性抗 原(PsAWU),并对该抗原和水溶性抗原(PsAWA)的血清学特性进行了分析比较,结果表明PsAIVU的敏感性高于PsAWA,初步证明具一定的特异性,是一种可实际应用的新型抗原。为进一步分析两种抗原,对其蛋白组成及活性成份进行了初步研究。 氨基酸组成的分析 两种抗原浓度均为1 mg/ml,用稀盐酸加热处理后,以氨基酸分析仪(Beckman公司)进行测定。结果表明两种抗原的氨基酸种类基本一致,但绝大     

人血清载脂蛋白A-I的分离、纯化及其测定

用超离心法制备人血清高密度脂蛋白(HDL);甲醇/氯仿脱脂;经Sephadex G-150层析及DEAE-纤维素(DE-52)离子交换得纯化载脂蛋白A-I(Apo A-I),免疫新西兰兔,获得效价为1:32的特异性抗人Apo A-I抗血清。用本室建立的单向火箭免疫电泳法测定了158名健康中年人与9名老人的血清Apo A—I含量,结果发现:β-脂蛋白<5g/L,总胆固醇<2mmol/L的人血清Apo A-I含量男女分别为2.06±0.16g/L和2.07±0.15g/L;而β脂蛋白≥5g/L,总胆固醇≥2mmol/L的人血清Apo A-I含量男女分别为1.75±0.15g/L和1.82±0.1g/L,由此可见,血脂正常的男性和女性的Apo A—I含量均显著高于血脂高的男性和女性。80岁以上老年人的血清Apo A-I含量为2.1±0.1g/L,也在正常范围。与文献报道比较,我国人的血清Apo A-I含量高于外国人,这与我国人HDL水平较外国人高一致。     

L-肌肽对大鼠硒性白内障的影响

Objective To explore the effect of L-canosine in preventing and treating rat cataract induced by sodium selenite. Methods This was an experimental study. Cataract was induced in the rats by sodium selenite. Rats were divided into 3 groups and each group has 3 ones. L-canosine eye drops (50 g/L or 20 g/L) and 0.9% normal saline were respectively instilled to the rat eye for 3 weeks and examined. L-canosine was added to the medium of cultured rat cataract lens at 1.00, 0.10 and 0.01 g/L for 1 week and then examined. Cataract lens were studied by using two-dimensional eletrophoresis. Results One week after instillation of L-canosine, the scores of rat cataract were 2.22±0.65, 2.39±0.98 and 2.83±0.38 in 50 g/L, 20 g/L L-canosine and control groups, respectively. The lesion in 50 g/l, L-canosine group was lighter than that of the control group. There was significant difference between these two groups (P=0.013). On the 2nd and 3rd weeks, there was no difference among these three groups. After 1 week for culturing cataract lens, there was no difference between these three groups. The results of two-dimensional eletrophoresis showed that the protein number was 182 and 161 in the L-carnosine and control groups, respectively. High molecular weight protein decreased and low molecular weight protein increased in L-carnosine group. Conclusions L-carnosine at 50 g/L could restrain the development of early stage rat cataract. L-camosine could modulate the rat lens protein in vitro, but could not affect lens cataract scores.     

胃病患者血清α1—酸性糖蛋白临床分析

用单向免疲扩散法,测定了200例胃病患者血清α_1-酸性糖蛋白。结果表明,胃癌组血清α_1-酸性糖蛋白明显高于正常对照组(P<0.001);胃溃疡、十二指肠溃疡、浅表性胃炎、萎缩性胃炎均较正常对照组降低(P 均<0.01),各组之间无显著性差异(F=2.64,P 接近0.05),各组与胃癌组之间有极显著性差异(P<0.01)。胃癌在胃镜下按 Borrmann's 分型比较,Ⅰ、Ⅱ、Ⅲ、Ⅳ型之间亦有显著性差异(P<0.01)。提示该检查有助于胃部疾惠良、恶性的鉴别,据其可估计病人的预后。     

槽式对流免疫电泳法检测可提取性核抗原抗体的研究

用引进的槽式对流免疫电泳法（槽ＣＩＥ）和国内常规的免疫双扩散法（ＩＤ），同时对８９例病人血清可提取性核抗原（ＥＮＡ）的抗体进行了测定和比较。槽ＣＩＥ法图像清晰、沉淀线呈弧型，结果明显比ＩＤ法容易判断，ＥＮＡ抗体阳性病人血清的检出率非常显著地高于ＩＤ法（Ｐ〈０．００１），抗ＳＭ、ＲＮＰ、ＳＳＡ、ＳＳＢ等每种抗体的检出率也均高于ＩＤ法，其中前３种差异非常显著（分别Ｐ〈０．０１，Ｐ〈０．０１，Ｐ〈０．０     

人血浆凝血酶原纯化、抗血清制备及定量检测方法的建立

为建立一种定量检测血浆凝血酶原含量的方法,采用钡吸附、硫酸铵盐析、DE—52柱层析和硫酸葡聚糖—Sepharose 4B 柱层析4步法,从人血浆中提取凝血酶原,制备兔抗人凝血酶原血清,并进行特异性评价。建立火箭免疫电泳法检测血浆凝血酶原含量。结果表明:40例健康成人平均含量为98.5±12.7mg/L,男女之间无显著差异,肝硬化组(n=35)、急性肝炎组(n=38)和肝癌组(n=25)的凝血酶原含量分别为46.2±17.9mg/L、62.1±25.3mg/L 和79.8±16.1mg/L。