7种蛇类药材的等电点鉴别研究

用改进的蛋白质等电点法对7种蛇类药材进行了鉴别研究。结果表明不同种类的蛇,等电点有所不同。重现性好(CV<0.5),其等电点均值的差别(P<0.01)有非常显著的意义,可以作为去皮或粉末状蛇类药材鉴别的依据之一。     

恶性胸膜间皮瘤：3例尸解病例的组织化学和免疫组织化学研究

本文报告8例恶性胸膜间皮瘤尸解病例,上皮型2例,1例纤维型大体改变为巨大结节,并推挤膈肌至脐平面。对此3例进行了PAS、D-PAS,CM、AB、H-AB、CI、H-CI和CEA、Keratin、Vimentin等组化和免疫组化研究,并结合文献复习对人体胸膜间皮的组化和免疫组化特征进行了讨论,提出了人体胸膜间皮瘤的临床病理诊断与鉴别诊断意见。本组3例均合并DIC,推测本病有产生DIC的倾向性,临床对此病应警惕DIC发生的危险。     

Molecular cytogenetic study of short arm aberrations in human D, G group chromosomes.

Six cases of Dp+/Gp+, 10 cases of D/G translocation, 1 case of supernumerary marker chromosome, and 1 case of Yqs were studied using molecular and cytogenetic techniques. The Ag-NOR frequencies of the Dp+ and Gp+ groups were found to be higher than those of normal controls, while their satellite association frequencies were lower. Autoradiographic silver grains were not significantly distributed along the p+ part of the marker chromosome as revealed by chromosomal in situ hybridization using an rRNA probe. This result differs from our previous report. It is suggested that there might be different mechanisms for the formation of p+ on acrocentric chromosomes. D/G translocation cases were found to have lost their NOR. A study of supernumerary marker chromosomes and Yqs cases suggested that the marker chromosome and Yqs exerted no phenotypic effect. The mechanism of their formation is discussed.     

牙体修复材料体外充填密合度的扫描电镜研究

用扫描电镜直接观察及硅橡胶一环氧树脂扫描电镜复型技术观察银汞合金、ＥＢ复合树脂、玻璃离子粘固粉体外充填与釉质、牙骨／本质壁的边缘密合度。结果表明，与牙体组织呈化学性结合的玻璃离子粘固粉与釉质、牙骨／本质壁的密合度好，两壁之间无差别；ＥＢ复合树脂与釉质壁的边缘密合度与玻璃离子粘固粉相似，其缝隙明显小于牙骨／本质壁；银汞合金与釉质壁、牙骨／本质壁的边缘密合度差，且两壁之间无明显差别。     

人精液中ABH血型物质分泌强度的研究

本文采用中和试验、沉降反应和解离试验对１３５例已知血型人精液中ＡＢＨ血型物质的分泌强度进行了检验，并将其分为强、中、弱三型。这对区别个人血型物质含量及性犯罪的法医学鉴定均有重要意义。并证明了ＡＢ型人精液中Ａ、Ｂ血型物质含量不均等现象，并且绝大多数人Ｂ型物质高于Ａ型物质。     

袖套法异种心脏移植模型

采用Heron袖套法进行异种（小鼠→大鼠）心脏移植，异位移植于颈部皮下，供体主动脉接受体颈内动脉，供体肺动脉接受体项外静脉，并对手术方法进行了部分改进。进行正式手术22次，成功率86％，移植后平均存活时间2．10±0．80天；该方法简单、迅速、可靠，移植于颈部易于观察，对于超急性排斥反应的观察以及免疫耐受的诱导，抗免疫排斥药物筛选是一位得推广的动物模型。     

The correlation of ureaplasma urealyticum infection with infertility

Summary. A prevalence study of Ureaplasma urealyticum (UU) infection of the male genital tract was carried out in Shanghai between March 1992 and June 1995. Significantly higher frequency of UU infection was found among infertile males (549/1416) as compared to fertile controls (34/375). Examination of 8 specimens each from infertile men and fertile subjects by electron microscopy, immunogold and immunofluorescence techniques, demonstrated adhesion of Ureaplasma urealyticum to the membrane of spermatozoa and exfoliated germ cells. In addition, gold particles on Ureaplasma urealyticum were found to be adhered to the sperm surface in 4 of the 8 samples. Strong specific anti-UU fluorescence was detected in 6 of 8 samples, mainly on the midpieces and post-acrosomal regions of the spermatozoa.
To further study the effects of Ureaplasma urealyticum on fertility, 47 male Sprague-Dawley (SD) rats were infected artificially with Ureaplasma urealyticum serotype 8 (T960). Morphological changes in the seminiferous tubules were observed 3–5 weeks after inoculation in the sacrificed animals. Dramatic impairment of spermatogenesis of both testes was found in 11 rats. Mating experiment confirmed infertility in 12 of 40 rats. Offsprings of the infected rats were significantly smaller than those of controls in terms of prenatal weights and birthweights.     

人精子染色体改良技术及其应用

课题研究提供了改良的人精子染色体直接制备，Ｇ显带核分析技术。在对８０例对象的人精子染色体直接制备，Ｇ显带核型分析中，成功率为６２．５％，较Ｔｅｍｐｌａｄｏ方法的成功率（５８．１％）进一步提高。通过对正常人，不育，流产对象的男性精子染色体研究，发现精子染色体数目和结构畸变率分别为：正常人２．３％和０％，不育１４．０％和４．８％，流产组４．５％和２．４％，不育和流产组的畸变率较正常人增加。在对５例染色     

Flow Cytometric Analysis of Lymphocyte Subsets of Mice Maintained on an Ethanol-Containing Liquid Diet

Alcoholic patients often have impaired immune function, yet little is known about the precise mechanism(s) of this impairment. We have previously shown that ethanol consumption by mice alters copolymer-specific humoral and cellular immune responses. In this study, we asked whether alcohol consumption by mice would phenotypically alter lymphocyte populations. Female C57BL/6 mice were fed a nutritionally complete liquid diet containing 35% ethanol-derived calories for up to 8 days. As controls, mice either were fed a liquid control diet that isocalorically substitutes sucrose for ethanol or remained on a standard solid diet and water ad libitum. Although mice fed ethanol-containing liquid or pair-fed control liquid diets have decreased numbers of spleen cells compared with solid diet controls, only the ethanol-containing diet allowed normally nonresponder C57BL/6 spleen cells to make antibody responses to the poly(Glu⁵⁰Tyr⁵⁰) synthetic copolymer antigen. Flow cytometric analysis of splenic lymphocyte populations of mice on the ethanol-containing diet shows an increase in the relative proportion of T-lymphocytes as compared with mice on either solid or liquid control diets. No such change is seen for either B-cell or natural killer cell populations in these same mice. Both liquid control and liquid ethanol diets caused a slight decrease in the CD4:CD8 ratios of splenic T-lymphocytes. We see the relative percentage of T-cells bearing the αβ-cell receptor (TcR) increases in the spleens of liquid ethanol diet mice; a smaller increase TcRαβ usage is seen in the spleens of liquid control mice, compared with solid diet mice. Flow cytometric analysis shows that little, if any, difference exists in TcRγδ expression between the liquid ethanol and either the liquid control or solid diet groups. Preliminary analysis of TcRαβ subsets suggest that ethanol increases the percentage of T-cells expressing Vβ5 and Vβ8, and decreases the percentage of Vβ11 expressing cells. These findings suggest that, in addition to modifying the immune response, ethanol alters the phenotypic expression of lymphocyte subsets.     

大鼠孤束核含酪氨酸羟化酶、神经降压素和胆囊收缩素样神经元向伏核的投射—HRP和免疫细胞化学双重标记法的研究

本文应用HRP顺、逆行追踪法结合免疫细胞化学双重标记法,对大鼠孤束核向伏核的投射进行了研究。主要结果如下:1.WGA-HRP注入孤束核尾侧段,在伏核后部的腹、内侧区,出现较密集的标记纤维、终末和标记细胞;将HRP注入伏核后部的腹、内侧区,在孤束核尾侧段(主要在连合核和内侧亚核)出现大量的顺、逆行标记,以同侧为主。2.HRP注射到伏核并结合免疫细胞化学反应,在孤束核尾侧段发现HRP-TH,HRP-NT、HRP-CCK双重标记细胞。HRP-TH的数目最多,其次是HRP-NT双标细胞,HRP-CCK双标细胞最少。