微甘菊次生代谢产物的免疫学活性研究

为了探讨微甘菊次生代谢产物的免疫学活性,用微甘菊水溶性和脂溶性提取物喂食小鼠,用流式细胞仪测定小鼠T淋巴细胞亚群的变化规律,分析微甘菊提取物的免疫学活性。结果显示,微甘菊水溶性和脂溶性提取物均能刺激小鼠CD4^ 和CD8^ 细胞的产生,与对照相比,CD4^ ／CD8^ 比值均明显增加,水溶性提取物的效果更明显。微甘菊次生代谢产物中可能含有某些刺激动物免疫活性和提高抗癌能力的物质。     

绵羊红细胞的质量对静脉注射用人免疫球蛋白抗补体活性测定的影响

为了分析IVIG抗补体活性测定出现负值与绵羊红细胞质量的关系。采用CH50试验测定IVIG ACA时,在被检样品和其他试验条件相同的情况下,比较了被污染的和未污染的绵羊红细胞对IVIG抗补体活性测定的影响。结果显示,使用被污染的绵羊红细胞(作为试验材料时所得的)检测10份样品ACA(%)均为负值;使用未污染的绵羊红细胞未出现负值。提示被污染的绵羊红细胞干扰了抗补体活性测定,从而引起CH50试验结果出现偏差。     

恒河猴红细胞免疫功能的研究

本文应用花环法测定了健康恒河猴红细胞上C_(3b)受体和免疫复合物的数量。恒河猴红细胞上C_(3b)受体花环率的数量为12.83±1.95％,免疫复合物花环率为6.37±1.25％。研究结果表明恒河猴的红细胞,除了具有携氧、运输气体等功能外,还具有重要的免疫功能。     

药物滥用者红细胞免疫功能的变化

通过检测红细胞C3b受体花环（RBC－C3bRR)、红细胞免疫复合物光环（RBC－ICR）、粘附增强因子活性（RFER）及抑制因子活性（RFIR）,观察了50例海洛因依赖者红细胞免疫功能的变化。结果表明,海洛因依赖者RBC－C3bRR、RFER明显下降（P＜0．01）,而RBC-ICR、RFIR则明显升高（P＜0．01）。本文对检测结果进行了初步探讨。     

大熊猫总补体活性测定初探

测定大熊猫血清及某些体液中总补体活性(CH_(50)),对于研究大熊猫疾病的发生机理以及反映熊猫体内补体代谢的动态变化与疾病的相互关系具有重要意义。目前。对大熊猫补体活性测定的研究国内外文献尚未见报道,根据免疫生物学的原理,经过探索建立了一种适于大熊猫 CH_(50)测定方法。 一、标本来源:8例大熊猫均系成都动物园喂养,其中健康体检6例,雌雄各3例,体重55—65 kg,年龄3—8岁,病危抢救大熊猫2例(风湿病,肠梗阻各1例)。     

高原鼠兔红细胞免疫功能的研究

本文应用免疫花环试验法测定了封闭群中高原鼠兔红细胞Ｃ３ｂ受体和红细胞免疫复合物的花环率,并比较了不同年龄高原鼠兔红细胞的免疫功能。研究结果表明,高原鼠兔红细胞在自身免疫系统中具有重要的免疫功能;随年龄增长,其红细胞免疫功能逐渐减弱。与人、兔和大白鼠等动物相比,高原鼠兔红细胞免疫粘附活性高,因此适宜作红细胞免疫实验的动物模型。     

黄芪改善红细胞变形能力的活性成分研究

膜荚黄芪(Astragalus Membrannaceus(Fisch)Bunge)为豆科紫云英属植物,其根作为传统中药黄芪之正品。本课题通过以改善红细胞变形能力为活性导向筛选,用核孔膜滤筛法,以IF值为指标,对膜荚黄芪的成分进行了系统分离和鉴定。结果表明:黄芪中的黄芪皂甙Ⅱ,Ⅲ,Ⅳ(Astragaloside Ⅱ,Ⅲ,Ⅳ)等皂甙类及芒柄花素(Formononetin),毛蕊异黄酮(Calycosin)等异黄酮类化合物,对孵化红细胞的变形能力有明显的改善作用,这可能是黄芪改善血液流变学指标的重要机理。     

Mechanical resistance of amidinated human erythrocytes]

The amidination reactions by means of dimethyl adipimidate (0.25-10.0 mM) or dimethyldodecane-imidate (0.1-1.0 mM) cause an alteration of the mechanical resistance of red blood cells. Low amidination results in peripheral cross-links of erythrocytes whose mechanical resistance increase relative to borate buffer treated cells. Increasing cross-linking reduces the mechanical resistance of erythrocytes, which finally appears to have become restored. The final state, however, is characterized by an almost complete cross-linking of the cell, which than no longer behaves like an osmometer.     

Refractory nature of erythrocytes and thrombocytes]

The authors studied the influence of proteolytic enzymes and arachidonic acid on the erythrocyte and platelet aggregation. These substances stimulated the blood formed elements aggregation. At the same time preliminary incubation of fibrinolysin, trypsin and arachidonic acid with the blood formed elements suspension was accompanied by a significant reduction of their aggregation capacity, i.e. by the development of a refractory condition. A possible mechanism of this phenomenon is discussed.     

Acetylcholinesterase in aging of human erythrocytes]

Acetylcholinesterase possessed a different activity in the membranes of young, mature and old human erythrocytes - it was greatest in the mature and least in the old cells. In the young and mature erythrocytes the enzyme existed in the form of 3- and in the old ones in the form of 2-molecular components. The data obtained suggested that the changes in the structural organization of acetylcholinesterase in the red cell membrane had a direct relationship to the aging of these cells.     

Modification of sialic acid determination in erythrocytes]

Various chromophores impair the evaluation of N-acetyl-neuraminic acid (NANA) of red blood cells by means of the thiobarbituric acid method according to WARREN. Therefore, a time consuming isolation of erythrocyte membranes is essential in order to avoid these shortcomings. The procedure was simplified by fixation with glutaraldehyde of washed red blood cells.