托吡酯对慢性癫(癎)大鼠海马碱性成纤维细胞生长因子表达的影响

目的研究托吡酯（TPM）对慢性癫痫大鼠海马碱性成纤维细胞生长因子（bFGF）表达的影响。方法制作戊四氮（PTZ）慢性癫痫点燃大鼠模型，分为PTZ组、TPM组及正常对照组，每组又以5d、10d、15d3个时间点各分为3小组。免疫组化法观察各组海马CAl、CA3区及齿状回bFGF表达，HE染色观察病理形态学改变。结果（1）行为学观察：PTZ组和TPM组在癫痫发作上无明显差别。（2）bFGF表达：①各组齿状回区bFGF表达：PTZ组和TPM组各时点表达不断增高，与正常对照组比较差异有统计学意义（均P〈0．01），尤以10d及15d时增高更明显，与5d时比较差异有统计学意义（均P〈0．05）。②各组CAl区bFGF表达：PTZ组各时点均有明显表达，且随时间延长而表达不断增高，各时点比较差异有统计学意义（均P〈0．01），与正常对照组比较差异有统计学意义（均P〈0．01）；TPM组在5d时与正常对照组比较差异有统计学意义（P〈0．01），而10d、15d时逐渐下降，接近正常对照组水平。③各组CA3区bFGF表达：5d时3组比较差异无统计学意义。但PTZ组和TPM组在10d时与正常对照组比较差异有统计学意义（P〈0．01），PTZ组在15d时和TPM组及正常对照组比较差异有统计学意义（均P〈0．01）。（3）病理形态学改变：PTZ组和TPM组的海马CAl、CA3区尤其是CAl区可见较多神经元发生变性和坏死，PTZ组更显著。结论PTZ点燃过程中海马bF-GF表达增高，尤其在CAl区，且随时间延长有表达不断增高的趋势。TPM可能通过减少海马神经元损伤而明显下调海马CAl、CA3区bFGF的表达。     

妇科疾病中人乳头瘤病毒感染的分子流行病学调查

目的:探讨各种妇科疾病与人乳头瘤病毒感染的关系,建立不同妇科疾病和不同年龄段妇女人乳头瘤病毒感染的流行病学资料库。方法:应用反向点杂交技术分别对疾病组1 512例病人标本和正常组500例标本进行HPV检测,所得数据用SPSS 13.0软件包进行统计分析。结果:正常组500例标本中,阳性标本101例,感染率为20.2%,疾病组1 512例标本中,阳性标本523例,感染率为34.6%,其中双重感染82例,占阳性标本的15.7%,多重感染34例,占阳性标本的6.5%,而高危感染340例,感染率为22.5%,占阳性标本的65.0%,其中单纯HPV16亚型感染155例,占所有阳性标本的29.6%;不同年龄段、不同性生活史、不同妇科疾病以及不同首次性生活年龄的HPV感染检出率都有显著性差异。结论:正常组和疾病组的HPV感染率有显著性差异(2χ=36.37,P<0.01)。在HPV感染的普查中可以有重点的选择高危人群,这样更加有针对性,从而大大降低普查成本。     

血浆甲地孕酮的高效液相色谱测定法

本文研究和建立了测定血浆中甲地孕酮的反相高效液相色谱法。其最低检测限为2～4ng,一日内回收率为107%,三日内回收率为98%。本法与 RIA 法测定同一样品,结果相关性好,r=0.986。     

丙型肝炎的临床特点

丙型肝炎（ＨＣ）８６例，经临床观察发现其临床特点是：①潜伏期长短不一，长者１２０ｄ短者２６ｄ，平均４０．５±１４．５ｄ。②起病缓慢而隐匿。③病状轻，体征不明显，病程长。④肝功能损害程度与症状、体征不一致，往往不能及时诊治。⑤肝功能恢复慢，ＡＬＴ、ＡＳＴ有持续升高或反复异常。⑥治疗：用治疗肝炎的常用药物仅对改善症状有一定作用，对缩短病程及肝功能恢复无效。     

老年性聋大鼠耳蜗COX活性的研究

目的:探讨线粒体呼吸链细胞色素C氧化酶(COX)活性异常在老年性聋发病中的作用机制.方法:免疫组化法检测老年性聋大鼠耳蜗COX活性.结果:与正常对照组相比,实验组老年性聋大鼠耳蜗中COX活性降低.结论:耳蜗组织中COX活性降低在老年性聋的发病中起一定作用.     

The significance of epithelial differentiation in mixed mesodermal tumors of the uterus. A clinicopathologic and immunohistochemical study

Mixed mesodermal tumors and carcinosarcomas of the uterus are classified as sarcomas. However, in other sites, malignant biphasic tumors may be classified as carcinomas, mesotheliomas, or sarcomas. In order to clarify their behavior and patterns of differentiation, we performed a clinicopathologic and immunohistochemical study of 22 cases aimed at analyzing the pattern of spread and histologic appearance of the metastasis, as well as the distribution of intermediate filaments in the primary tumor and the metastasis. Four monoclonal antibodies (Mabs) were used to detect epithelial lineage, three that recognize keratin (AE1/AE3, CAM5.2, MAK6) and one that recognizes epithelial membrane antigen (EMA). A Mab against vimentin was also used. Metastases involved the omentum, pelvic peritoneum, ovaries, fallopian tubes, pelvic or para-aortic lymph nodes, liver parenchyma, and tonsil. These metastases were composed of carcinoma only. Lymphatic/vascular invasion was identified in 11 cases; it consisted exclusively of carcinoma. In all 12 cases evaluated immunohistochemically, keratin and EMA were identified in the majority of the cells in the epithelial component and in a more focal distribution in the spindle cell component in 11 (92%). Vimentin was detected in the majority of spindle cells in nine cases (75%) and in a more focal distribution in the epithelial component in six cases (50%). In the spindle cell component, keratin and EMA were present in widely scattered individual spindle-shaped and rounded cells, within solid clusters of rounded cells, and in nests of cells with small lumens. The distribution of keratin, EMA, and vimentin in the metastases (carcinoma in all instances) was similar to the epithelial component in the primary tumor. Our findings indicate that the epithelial component of these tumors invades lymphatic/vascular spaces and metastasizes, whereas the spindle cell component has limited metastatic potential, if any. Since the behavior of these neoplasms is dictated by the epithelial element, we believe that mixed mesodermal tumors of the uterus should be classified as carcinomas rather than sarcomas.     

甲氧基红霉素对卡马西平药物动力学的影响

应用荧光偏振免疫法，测定６只家兔ｐｏ卡马西平及连续多次ｐｏ用搓甲氧基红霉素后ｐｏ卡马西平的血清卡马西平浓度，用３ｐ８７程序包按二室模型对数据进行处理并进行统计学分析。     

Growth factor pre-treatment differentially regulates phosphoinositide turnover downstream of lysophospholipid receptor and metabotropic glutamate receptors in cultured rat cerebrocortical astrocytes

Reactive gliosis is an aspect of neural plasticity and growth factor (GF) stimulation of astrocytes in vitro is widely regarded as a model system to study astrocyte plasticity. Astrocytes express receptors for several ligands including lysophosphatidic acid (LPA) and sphingosine-1-phosphate (S1P), agonists for the G-protein-coupled lysophospholipid receptors (lpRs). Activation of lpRs by LPA or S1P leads to multiple pharmacological effects including the influx of calcium, phosphoinositide (PI) hydrolysis, phosphorylation of extracellular receptor regulated kinase (ERK), release of arachidonic acid, and induces mitogenesis. Treatment of astrocytes in vitro with a growth factor cocktail (containing epidermal growth factor [EGF], basic fibroblast growth factor [bFGF] and insulin) led to a marked attenuation of lpR-induced PI hydrolysis. In contrast, under identical conditions, GF treatment led to marked potentiation of PI hydrolysis downstream of activation of another abundantly expressed G-protein coupled receptor, mGluR5. Quantitative gene expression analysis of GF-treated or control astrocytes by TaqMan RT-PCR indicated that GF treatment did not change gene expression of lpa1 and s1p1, but increased gene expression of s1p5 which is expressed at very low levels in basal conditions. These results suggest that GF differentially affected PLC activation downstream of mGluR5 versus lpR activation and that the changes in mRNA levels of lpRs do not account for marked attenuation of agonist-induced phosphoinositide turnover.     

糖基化终末产物对大鼠肾系膜细胞纤溶酶原激活物抑制物-1表达韵影响

目的：观察糖基化终末产物（AGEs）对大鼠肾系膜细胞纤溶酶原激活物抑制物-1（PAI-1）表达的影响及其与细胞外基质（ECM）成分含量的关系。方法：体外培养正常大鼠肾系膜细胞，分别用糖化牛血清白蛋白（AGEs）及未经糖化的牛血清白蛋白（BSA）处理，以常规培养的肾系膜细胞作为对照，检测不同时间、不同浓度AGEs对纤维连接蛋白（FN）、Ⅳ型胶原、PAI-1表达的影响。MTT法检测AGEs对系膜细胞增殖的作用，ELISA测定条件培养基中FN、Ⅳ型胶原及PAI-1蛋白含量，逆转录聚合酶链式反应（RT—PCR）检测系膜细胞PAI-1 mRNA的表达。结果：与相应浓度的BSA比较，AGEs（0—200mg／L）对系膜细胞增殖无明显影响，但可不同程度地刺激系膜细胞FN、Ⅳ型胶原、PAI-1蛋白的产生。RT—PCR检测显示，给予AGEs（100mg／L）的系膜细胞PAI-1 mRNA的表达明显增加（P〈0．01）。结论：AGEs促进系膜细胞PAI—1的表达，提示AGEs通过上调PAI-1的表达而减少细胞外基质降解，可能是糖尿病肾病细胞外基质积聚的原因之一。     

Isolation and differentiation of embryonic stem cells from BALB/c mouse

Objective To invest the efficient method which can culture and induce embryonic stem cells to neurocyte in vitro. Methods Isolate the blastula of 3.5 d from BALB/c species mouse. Culture the cells from inner cell mass (inner cell mass, ICM) which were isolated by mechanical method on the mouse embryonic fibroblaste cell (MEF) feeder layer or 0.1% gelatin coated dishes. The stem cells were identified by characterized morphology, alkaline phosphatase stain, differential potency in vivo and immunochemistry stain. The isolated cells were differentiated by serial induction method that mimicking the intrinsic developmental process of the neural system. Results The isolated cells were positive for alkaline phosphatatse and SSEA-1 (stage specific embryonic antigen 1). Moreover they were identified pluripotent by differentiation in vivo. Therefore the isolated cells presented the characters of ESCs. Then the isolated cells were able to differentiate into neurocytes in vitro. Conclusion Mouse embryonic stem cells isolation, culture and differentiation system has been established.