Successful immunological treatment of gallbladder cancer in India―Case report

INTRODUCTION In cancer patients, tumor immunity is generally impaired. However, tumor immunity may occur in-vivo as circulating tumor-specific antibodies, with cytotoxic T lymphocytes (CTLs) having been identi- fied in cancer patients (Disis et al., 1997; Albert et al., 1998) suggesting that effective anti-tumor responses may be elicited through immunotherapeutic strategies. In recent years, a number of clinical trials have proved the safety and feasibility of using human dendritic cell…     

人白血病细胞系KG1a中P2X7受体的表达和功能研究

用半定量RT-PCR和流式细胞术，研究了白血病细胞系KG1a中P2X7受体在基因和蛋白水平的表达。用荧光分光光度计，测定了用激动剂三磷酸腺苷（ATP）和苯甲酰苯甲酸ATP（BzATP）刺激前后细胞内钙离子浓度的变化，证明P2X7受体的功能。结果表明：KG1a细胞表达P2X7受体，且在激动剂的刺激下能引起KG1a细胞通过P2X7受体的胞外钙内流；去除胞外钙离子时，激动剂不能引起胞内钙浓度的升高；提示KG1a细胞表达P2X7受体的基因和功能蛋白，激活该受体引起胞外钙离子的内流。     

洋葱根尖细胞有丝分裂实验改进

洋葱根尖细胞有丝分裂实验是中师生物教学的一个基础实验 .由于教材提供的实验方法存在一些弊端 ,致使该实验常常达不到预期效果 .通过对本实验各个环节的认真研究 ,探讨出了一种新的实验操作方案 ,使学生实验的成功率大为提高     

HAND-ASSISTED LAPAROSCOPIC NEPHROURETERECTOMY:INITIAL CASE REPORT

ＣａｓｅＲｅｐｏｒｔ:Ａ 4 7 ｙｅａｒ ｏｌｄｍａｎｈａｄｗｉｔｈａｎｉｎｔｅｒｍｉｔｔｅｎｔｇｒｏｓｓｈｅｍａｔｕｒｉａｆｏｒｍｏｒｅｔｈａｎｏｎｅｙｅａｒ.Ｏｎｐｈｙｓｉｃａｌｅｘａｍｉｎａｔｉｏｎｔｈｅｋｉｄｎｅｙｓｗｅｒｅｎｏｔｐａｌｐａｂｌｅａｎｄｔｈｅｒｅｗｅｒｅｎｏｂｉｌａｔｅｒａｌｃｏｓｔｏｖｅｒ ｔｅｂｒａｌａｎｇｌｅｔｅｎｄｅｒｎｅｓｓ.Ｌａｂｏｒａｔｏｒｙｉｎｖｅｓｔｉｇａｔｉｏｎｒｅｓｕｌｔｓｗｅｒｅｎｏｒｍａｌｅｘｃｅｐｔｆｏｒｈｅｍａｔｕｒｉａ .Ｓｕｓ ｐｅｃｔｅｄｃａｎｃ…     

细胞生物学教学与改革的思考

为提高细胞生物学教学质量，我们主要从以下两个方面进行改革与尝试：把当前的细胞生物学的最新进展融入教学中，更新教学内容；多种教学方法相结合，激发学生学习兴趣。     

将农杆菌Ti质粒携带的外源基因转入水稻细胞

未经特殊处理的农杆菌C58C1Rif~r菌株,与籼稻悬浮培养细胞共培养时,很少见有细菌的附着,也观察不到纤维丝的形成。但经复合酚类化合物预处理的菌株,与籼稻培养细胞在普通培养液,特别是在复合诱导培养液(培养过的番茄下胚轴切段、胡萝卜细胞及农杆菌的培养滤液)中共培养时,均可发现有较多的细菌附着于水稻细胞表面,并且菌体周围有纤维丝的形成。在复合处理组中,位于pGV3850:1103neo嵌合质粒T-DNA上的NPTⅡ基因及NOS基因在籼稻培养细胞中获得了转移与表达。     

Lymphotactin enhances the in-vitro immune efficacy of dendritoma formed by dendritic cells and mouse hepatocellular carcinoma cells

Objective: To investigate the in-vitro antitumor immune responses of dendritoma formed by mouse hepatocellular carcinoma (HCC) cells and lymphotactin (Lptn) gene modified dendritic cells (DCs). Method: DCs prepared from mouse bone marrow were genetically modified by lymphotactin adenovirus, and fused with H22 cells by polyethylene glycol (PEG). RT-PCR and ELISA were employed to identify lymphotactin expression at mRNA and protein level. Cell phenotypes and fusion efficiency was detected by FACS. The stimulatory effect of DC on T cells was detected by mixed lymphocyte reaction. The cytotoxicity activity against H22 cells was assayed by LDH method. Results: Lymphotactin could be efficiently expressed by DCLptn/H22 hybridoma. DCLptn/H22 cells could induce potent T cell proliferation effect and generate strong cytotoxic T lymphocyte (CTL) reaction against allogenic H22 cells. Conclusion: Lymphotactin genetic modification could enhance the in vitro immune activity of the dendritoma.     

艾迪加体部伽玛刀治疗非小细胞肺癌疗效观察

为了观察艾迪加体部伽玛刀治疗非小细胞肺癌的近期疗效及毒副反应,经临床、影像学和病理学诊断90例非小细胞肺癌,采用随机分组原则分为艾迪加体部伽玛刀治疗组和单纯体部伽玛刀治疗组.结果表明,治疗后3个月复查艾迪加体部伽玛刀治疗组总有效率和CR均略高于单纯体部伽玛刀治疗组;治疗后白细胞下降率分别为4.44%和17.78%,症状改善率分别为84.44%和62.22%,KPS提高率分别为62.22%和33.33%,组间差异性明显.可见,艾迪加体部伽玛刀治疗既能提高非小细胞肺癌的局部控制率,又能增强机体免疫功能.     

破伤风类毒素单克隆抗体的制备及初步鉴定

目的：制备并鉴定破伤风类毒素单克隆抗体杂交瘤细胞株,为破伤风的快速检测及致病机制的研究提供实验材料。方法：用破伤风类毒素做抗原免疫BALB/C小鼠,取其脾细胞与小鼠骨髓瘤细胞融合,获得分泌高滴度针对破伤风类毒素的杂交瘤细胞株,测定单抗免疫球蛋白亚类及单抗效价,用间接ELISA和Western-blot检测单克隆细胞株的特异性。结果：通过细胞融合和克隆化,筛选出3株持续分泌抗破伤风类毒素单克隆抗体的杂交瘤细胞株1E12、1E11、1G10。间接ELISA和Western-blot检测结果表明1E12、1E11、1G10可以和破伤风类毒素发生特异性反应。结论：成功制备了抗破伤风类毒素单克隆抗体,为制备免疫诊断试剂盒和抗体药物的开发奠定了基础。     

实现氢经济及其相关基础研究所面临的挑战

以氢为基础的能源体制的建立是人类最近开始追求的目标。本文简要 概述了氢经济的三要素：生产、储运和应用，指出了氢经济的现状以及实现氢经济的困难， 仅靠现有技术的增量进步无法克服这些困难，必须大力开展基础研究，并提出了一些建议。