精神分裂症患者外周血淋巴细胞姊妹染色单体交换的初步观察

检测了18例精神分裂症患者和25例健康人的SCE频率,结果提示患者组SCE频率显著高于对照组,与年龄、性别、病程、临床类型、有无遗传家族史无明显相关。研究提示SCE频率增高似与疾病本身有关。     

间接血凝试验诊断旋毛虫病

本文采用经Sephadex G-200层析后的旋毛虫幼虫抗原对实验感染旋毛虫大鼠和旋毛虫病人血清作间接血凝试验(IHA)。结果表明,20只大鼠感染后第16天全部出现阳性反应。9例旋毛虫病患者为阳性。本试验用于囊虫病、华枝睾吸虫病和健康人及正常大鼠均为阴性。检查本地区31只狗,阳性符合率为66.7％。     

聚合酶链反应技术用于缺失型α─地中海贫血的分子筛查和产前诊断

用血液学方法筛查育龄夫妇８４３２人，检出α一地中海贫血（α一地贫）６４６例，从中随机取出典型阳性样本１００例，用聚合酶链反应（ＰＣＲ）直接分析法进行基因诊断，结果９６例“标准型”α一地贫和３例血红蛋白（Ｈｂ）Ｈ病的ＤＮＡ样品均可检测到（－－ＳＥＡＩ）突变，另１例α一地贫复合ＨｂＱ样品未检测到该突变。此外，采用本法完成了７个重症α一地贫高风险胎儿的产前诊断。     

西藏地区农牧民生活习俗与包囊虫病的关系调查

目的　探讨西藏地区农、牧民生活习俗与包囊虫病的关系。方法　自制问卷对 7个县 2 40个家庭 163 1名成员与包囊虫感染有关的生活习俗进行调查分析。结果　饭前便后洗手的人仅有 16 1%,餐具一般都用天然水洗 ,大部家庭用天然绵羊绒擦洗茶具。大多数人都喝过河溪水 ,池塘水 ,人人都吃半生不熟的肉 ,半数以上的吃生肉和生血肠 ,绝大多数人喝未经消毒的鲜牛、羊奶。 10 0 %家庭养狗 ,所有人员与狗、羊、牛、马接触密切。包囊虫病人占调查人数 0 43 %( 7/ 163 1) ,有典型症状者占 0 67%( 11/ 163 1)。结论　当地居民感染包囊虫与不良生活习俗有关     

类风湿性关节炎患者氧化还原物水平的测定

OBJECTIVE: To examine the oxidation or reduction products in patients with rheumatism arthritis (RA), and investigate the relationship between oxidation or reduction products and occurrence and development of RA. METHODS: The serum levels of total ascorbic acid (TAA), dehydroascorbic acid (DHAA)/TAA, vitamin E, advanced oxidation protein products (AOPP) and malondialdehyde (MDA) were detected by high-performance liquid chromatography with electrochemical detection in 83 RA patients and 30 healthy adults. Correlation analysis of AOPP, MDA and hs-CRP was performed. RESULTS: Compared with normal control group, significantly higher serum MDA, DHAA/TAA, and AOPP levels were detected in RA patients (P<0.05), but vitamin E showed no significant difference (P<0.05). Linear regression analysis showed that MDA (P<0.01) was positively but AOPP (P>0.05) negatively correlated to hs-CRP. CONCLUSIONS: Oxidation or reduction products in serum of RA patients increases significantly, which may be an important mechanism for the occurrence and development of RA. Serum AOPP and MDA levels can reflect the oxidation status in RA patients.     

Directed differentiation of Balb/C mouse embryonic stem cells into pancreatic islet-like cell clusters in vitro: observation by atomic force microscope]

OBJECTIVE: To observe the morphological changes of Balb/C mouse embryonic stem cells following directed differentiation into pancreatic islet-like cell clusters (PICC) in vitro using atomic force microscope (AFM). METHODS: Balb/C mouse embryonic stem cells were first cultured into embryonic bodies (EBs) and allowed to differentiate spontaneously for 4 days. The cells were then transferred to gelatin-coated dishes for the EBs to attach and spread on the tissue culture plates, in the course of which a series of cell growth factors such as basic fibroblast growth factor (bFGF), insulin-like growth factor 1 (IGF-1) and nicotinamide were added into the culture medium at specific time points to induce directed differentiation of the stem cells into PICC. Immunocytochemistry was employed to detect the cells positive for insulin and glucagon, which were observed with AFM. RESULTS: The embryonic stem cells developed into cell clusters of different sizes, in which the cells were tightly arranged. Islet B cells were numerous in the center of clusters and darkly stained, but fewer in the peripherals with lighter stains. Islet A cells expressing glucagon were relatively fewer in the cell clusters, found mainly in the peripherals. Scanning of the insulin-positive clusters by AFM revealed large quantity of tissue fibers resembling nerve fibers that formed a reticular structure in disorderly arrangement. Numerous round granules were observed in the cytoplasm of almost identical sizes ranging from 0.5 to 1.0 mum in diameter. CONCLUSION: The cell clusters obtained by directed differentiation are mature in both morphology and function with also well organized structures.     

凋亡素原核表达载体的构建和表达

目的 构建凋亡素原核表达系统，以制备抗原物质凋亡素融合蛋白。方法 通过PCR方法，以pcDNA-VP3质粒为模板，扩增出凋亡素VP3基因。将其克隆到原核表达载体pET-DsbA的多克隆位点，构建成凋亡素的高效原核表达栽体pET-DsbA-VP3，将该质粒转化到大肠杆菌E．coliBL21(DE3)plysS中，以异丙基硫代-β-D-半乳糖苷(isopropylthio-β-D-galactoside，IPTG)对其进行诱导表达，聚丙烯酰胺凝胶电泳分析目的蛋白。结果 转化有凋亡素原核表达载体pET-DsbA-VP3的大肠杆菌E．coliBL21(DE3)plysS经IPTG诱导后，聚丙烯酰胺凝胶电泳出现38300的目的蛋白条带。结论 凋亡素原核表达栽体pET-DsbA-VP3能高效表达出凋亡素融合蛋白。