大鼠异体肢体移植术后急性排斥反应阶段血管内皮细胞ICAM-1表达的动态变化

Objective To investigate the dynamic changes of intercellular adhesion molecule-1 (ICAM-1) expression in endothelial cells (EC) during hindlimb allograft acute rejection in rats and the inhibitory effect of cyclospofine A (CsA) on the acute rejection. Methods The rat model of hindlimb allograft was developed. The rats were randomly divided into following groups: control group (Wistar→Wistar), rejection group ( Sprague-Dawley→Wistar) and CsA-treated group (Sprague-Dawley→Wistar). At postoperative day 1, day 4 and day 7samples of the femoral artery from the allograft limb were harvested to observe the pathologic changes. ICAM-1 expression in EC was quantified using immunohistochemical assay. Results Slight swelling and weak ICAM-1expression of EC were observed in the control group. In the rejection groups, obvious EC swelling and massive lymphocyte infiltration were seen. ICAM-1 expression in EC was significantly stronger and elevated. In CsA-group only mild infiltration of lymphocytes was seen and ICAM-I expression in EC was also much weaker.Conclusion During rat hindlimb allograft acute rejection the expression of ICAM-1 in EC was closely related to the occurrence and development of acute rejection. CsA could reduce the expression of ICAM-1 in EC and hence inhibit acute rejection of composite allograft.     

二苯甲基亚砜基乙酰胺及硫代乙酰胺类化合物的合成与生物活性研究

基于发作性睡病治疗药物莫达非尼的结构,设计并合成了两个系列的新化合物,分别为2-[(二苯甲基)亚砜基]乙酰胺类和2-[(二苯甲基)硫代]乙酰胺类化合物,并测定了这些化合物的生物活性。以二苯基甲醇为原料,经取代、氧化和酰化等反应合成了15个目标化合物(6a～6o),其结构经ESI-MS、1H NMR和元素分析确证。以小鼠自主活动实验测定了合成化合物对小鼠中枢神经的影响。初步构效关系表明,化合物6c、6f、6h和6n能提高小鼠的自主活动,其中6h的中枢兴奋活性略强于阳性对照药莫达非尼。     

Genistein对体外培养兔软骨细胞一氧化氮表达的影响

目的：观察受体酪氨酸激酶抑制剂genistein对体外培养兔软骨细胞一氧化氮（NO）表达的影响。方法：兔膝关节软骨细胞传代培养,应用不同浓度genistein干预1、2、3、4天后,通过亚硝酸盐测定检测培养上清液NO表达水平。结果：形态学、甲苯胺蓝染色显示3代以内体外培养软骨细胞保持细胞表型的稳定。在genistein干预后上清液中NO水平下降,下降水平与genistein干预浓度和时间相关。结论：体外培养兔软骨细胞三代以内的细胞具有较好的活性,genistein能有效降低兔软骨细胞NO的表达水平。     

普伐他汀对去势大鼠骨质疏松症的治疗作用

目的 探讨普伐他汀片对去势大鼠骨质疏松症的治疗作用,为临床用药提供依据.方法 取12周龄的雌性Wistar大鼠加只,氯氨酮(5 mg/100 g)麻醉条件下,其中30只打开腹腔去除双侧卵巢,逐层缝合,另10只予以单纯打开腹腔不切除卵巢.将大鼠分模型组、普伐他汀组、阳性对照组、正常对照假手术组4组,饲养12周后,分别予以生理盐水(10 ml/kg)、普伐他汀水溶液(2 ms/ks)、α-D3水溶液(0.05μg/kg)及生理盐水(10 ml/kg)灌胃.灌胃12周后,活杀各组动物,以双能X线密度测定仪测定骨密度.取血清用放免法测定血清中骨钙素(BGP)、降钙素(CT).通过三点弯曲试验,记录载荷-变形曲线,测定骨生物力学指标.结果 经过12周的普伐他汀水溶液灌胃治疗,明显提高了去势大鼠的骨密度、血清激素水平,与模型组比较,差异均有统计学意义(P<0.01或<0.05),并能改善治疗组大鼠的骨力学性能.结论 普伐他汀可提高去势大鼠的骨密度值及血清激素水平,改善骨的生物力学性能,具有治疗骨质疏松症的作用.     

海南省关节炎和神经系统疾病患者莱姆病调查

目的 了解我国海南省关节炎或神经性疾病患者的莱姆病感染状况,并确认海南省是否存在莱姆病人。方法 海南省三亚市人民医院提供血清542份,均为关节炎或神经性疾病患者。采用间接免疫荧光法(Indirect Fluorescent-Antibody Test, IFA)和免疫印迹法(Western Blot,WB)对血清标本进行莱姆病抗体检测;并采用巢式PCR法对WB抗体阳性的血清标本进行病原学检测。结果 IFA方法检测血清样本542份,54份阳性,阳性率为9.96%。应用WB法对上述54份IFA阳性血清样本进行检测,12份阳性。采用巢式PCR方法检测12份WB阳性样本,2份阳性,测序结果表明两份均为B.garinii基因型。结论 本研究证实了海南省人群中存在莱姆病。建议当地医生在诊治关节炎和神经性疾病患者时,可以考虑其是否罹患莱姆病。     

全外显子组测序检测到一视网膜色素变性家系ABCA4基因致病剪切新突变

目的探讨一个中国视网膜色素变性（RP）家系的致病基因及其位点。方法实验研究。对一个RP家系的成员进行病史采集、视力检查、眼底检查及多焦视网膜电图（mfERG）检查。绘制家系图,对家系成员采血,进行DNA提取、全外显子组测序、数据分析和Sanger测序验证,并在500例健康对照者中进行测序验证。结果共纳入该家系成员5例,含2例患者。患者表现为青少年期发病,夜盲,进行性周边视力受损,逐渐累及中央区。眼底检查显示视网膜色素沉着。mfERG显示a波、b波振幅明显下降甚至记录不到。家系特点为2例患者为姐妹,另一位姐妹正常,父母均正常,符合常染色体隐性遗传模式特征。经外显子组测序、数据分析和Sanger测序验证后,发现ABCA4变异性剪切位点c.1761-2A>G发生纯合突变。另外,在500例健康对照者中,Sanger测序没有发现该位点纯合突变。结论本研究发现了一个新的视网膜色素致病基因突变位点c.1761-2A>G,扩大了ABCA4致病基因位点谱,为临床的诊断和治疗提供了新靶点。     

二氟代苯甲亚砜基乙酰胺类化合物的合成与生物活性

在莫达非尼的结构基础上设计并合成了一系列新的二氟代苯甲亚砜基乙酰胺类化合物,并对这些化合物的中枢兴奋活性进行了测定。以二(4-氟苯基)甲醇为原料,经取代、酯化、胺解和氧化等反应合成了二氟代苯甲亚砜基乙酰胺类衍生物,共计16个目标化合物(5a～5p),其结构经ESI-MS、1H NMR、IR和元素分析确证,然后以小鼠自主活动实验测定了其中枢兴奋活性。初步研究表明,化合物5a,5b,5c,5e以及5j能提高小鼠的自主活动,其中化合物5b的中枢兴奋活性与莫达非尼相当。     

噻唑烷二酮类胰岛素增敏剂的研究进展

对近年来噻唑烷二酮类胰岛素增敏剂研究开发的品种、构效关系、作用机制以及临床研究近况进行了介绍,并评价了它们在抗Ⅱ型糖尿病病药物中的地位。     

大鼠异体肢体移植术后急性排斥反应阶段血管内皮细胞ICAM-1表达的动态变化

Objective To investigate the dynamic changes of intercellular adhesion molecule-1 (ICAM-1) expression in endothelial cells (EC) during hindlimb allograft acute rejection in rats and the inhibitory effect of cyclospofine A (CsA) on the acute rejection. Methods The rat model of hindlimb allograft was developed. The rats were randomly divided into following groups: control group (Wistar→Wistar), rejection group ( Sprague-Dawley→Wistar) and CsA-treated group (Sprague-Dawley→Wistar). At postoperative day 1, day 4 and day 7samples of the femoral artery from the allograft limb were harvested to observe the pathologic changes. ICAM-1 expression in EC was quantified using immunohistochemical assay. Results Slight swelling and weak ICAM-1expression of EC were observed in the control group. In the rejection groups, obvious EC swelling and massive lymphocyte infiltration were seen. ICAM-1 expression in EC was significantly stronger and elevated. In CsA-group only mild infiltration of lymphocytes was seen and ICAM-I expression in EC was also much weaker.Conclusion During rat hindlimb allograft acute rejection the expression of ICAM-1 in EC was closely related to the occurrence and development of acute rejection. CsA could reduce the expression of ICAM-1 in EC and hence inhibit acute rejection of composite allograft.     

胃浆细胞肉芽肿一例

患儿男,１２岁,因剑突下吞咽梗噎感６月入院。无腹痛、反酸及嗳气,无呕血、黑便。１年前曾有上腹疼痛史,诊断慢性胃炎,对症治疗后症状消失。体检无阳性体征发现。Ｘ线钡餐检查：贲门部狭窄、僵硬、钡剂通过困难,诊断贲门部恶性肿瘤。胃镜：贲门部、胃底见隆起肿块,...