新城疫病毒7793株对人结肠癌细胞的杀伤作用

目的:研究新城疫病毒NDV7793对人结肠癌细胞的体外杀伤作用,为结肠癌的生物疗法奠定基础。方法:通过蚀斑实验纯化病毒并测定纯化的NDV7793株的感染力;用乳酸脱氢酶微量释放法测定纯化病毒对人LoVo和Ls174t结肠癌细胞株的杀伤作用并且通过血凝实验测定病毒在不同细胞中的增殖力。结果:NDV7793在感染细胞96h后出现直径约为0.5mm左右的空斑,PFU为1.25×107个/ml,为弱毒株;NDV7793对LoVo和Ls174t人结肠癌细胞株有明显的杀伤作用,而且杀伤作用的强度与病毒作用的时间和病毒的浓度呈正相关的关系;NDV7793可以在肠癌细胞中生长复制,该病毒株在人结肠癌细胞株LoVo的复制能力强于Ls174t。结论:NDV7793具有较强的选择性杀伤人结肠癌细胞的作用,且为弱毒株,这株病毒具备肿瘤生物治疗的潜能。     

2009年南宁市成年人甲型流感病毒H3、H9抗体血清学调查分析

目的了解2009年南宁市成年人甲型流感病毒H3、H9亚型感染情况,探讨流感流行的现状和趋势。方法应用HI法对随机抽样的216份血清样本进行流感抗体血清学检测。结果人群H3、H9抗体的阳性率分别为88.89%、12.04%,H3抗体阳性率有随年龄增长而增加的趋势。结论南宁市成年人流感病毒H3抗体维持在保护性水平,并已受禽流感病毒H9亚型的感染。禽流感病毒在人群中的感染状况需进一步研究。     

NDV7793促进人CD4~+T细胞表达TRAIL的实验研究

目的:研究新城疫病毒(Newcastle disease virus,NDV)弱毒株NDV7793能否促进人CD4+T细胞表达肿瘤坏死因子相关凋亡因子诱导配体(TNF-related apoptosis-inducing ligand,TRAIL)。方法:首先用免疫磁珠分选法(magnetic activated cell sorting,MACS)分选外周血静止CD4+T细胞,然后加抗CD3抗体、抗CD28抗体和白细胞介素-2(interleukin-2,IL-2)使之成为能被NDV激活的CD4+T细胞。用流式细胞技术(flow cytometry,FCM)检测NDV刺激的CD4+T细胞的TRAIL的表达水平。结果:MACS法分选外周血得到的CD4+T细胞纯度达到(97.38±0.28)%;能被NDV激活的CD4+T细胞表面分子CD25和CD69双阳性表达率可达(29.30±1.08)%,与PBS阴性对照组(2.40±1.30)%相比,差异有统计学意义(P0.05);FCM检测结果显示,与对照组比较,NDV7793刺激的CD4+T细胞TRAIL表达水平均有显著升高,且在NDV7793效价为25 HU时达到最大值。结论:NDV7793可刺激CD3抗体、CD28抗体和IL-2预先活化的CD4+T细胞表达TRAIL。     

500名中国和越南医科大学新生H9亚型禽流感病毒血清抗体调查

H9N2亚型禽流感病毒已在家禽中建立稳定的种系并广泛分布于世界各地[1]. 一般情况下,禽流感病毒不感染人类,但1997年以来,相继暴发禽流感病毒H5N1、H7N7和H9N2直接传染给人,特别是在中国内地和香港出现H9N2亚型流感病毒感染人[2,3],H9在人群中的隐性感染率比较高[4].中国广西和越南顺化医科大学新生来自全国多个省市,生活环境各不相同.为此,本研究选取这两所医科大学2010年新生进行禽流感病毒H9血清抗体调查.     

新城疫病毒7793株对人结肠癌细胞的杀伤作用

目的：研究新城疫病毒NDV7793对人结肠癌细胞的体外杀伤作用,为结肠癌的生物疗法奠定基础。方法：通过蚀斑实验纯化病毒并测定纯化的NDV7793株的感染力;用乳酸脱氢酶微量释放法测定纯化病毒对人LoVo和Ls174t结肠癌细胞株的杀伤作用并且通过血凝实验测定病毒在不同细胞中的增殖力。结果：NDV7793在感染细胞96h后出现直径约为0.5mm左右的空斑,PFU为1.25×107个/ml,为弱毒株;NDV7793对LoVo和Ls174t人结肠癌细胞株有明显的杀伤作用,而且杀伤作用的强度与病毒作用的时间和病毒的浓度呈正相关的关系;NDV7793可以在肠癌细胞中生长复制,该病毒株在人结肠癌细胞株LoVo的复制能力强于Ls174t。结论：NDV7793具有较强的选择性杀伤人结肠癌细胞的作用,且为弱毒株,这株病毒具备肿瘤生物治疗的潜能。     

新城疫病毒D817对裸小鼠人结肠癌移植瘤的抑制作用

Objective To study the anti-tumor effects of Newcastle disease virus (NDV) strain D817 on human colon carcinoma model in nude mice. Methods The nude mouse model of human colon carcinoma was established by subcutaneous inoculation of human colon cancer LOVO cells. The tumor-bearing mice were given PBS, 5-Fu, high-dose NDV D817, moderate-dese NDV D817 or low-dose NDV D817 via caudal vein injection. The tumor size and weight of mice were measured. The liver damages were examined by histopathology. Apoptosis and necrosis of tumor ceils were detected by flow cytometry. The endotumoral content of TNF-α was detected using a mouse TNF-a ELISA kit. The live vires was detected by bemagglutination (HA) test. Results The moderate-dose NDV D817 inhibited the tumor growth more apparently than 5-Fu. The tumor growth inhibition rate reached to 48.1%. The liver damage and the weight change caused by NDV were less severe. NDV D817 made an increased apoptosis index and induced production of TNF-α. Live virus was not detected in important organs except in the tumor of nude mice by HA test. Conclusion In the anti-tumor process in nude mice bearing xenografts of human colon carcinoma, a suitable dose of NDV D817 is more safe and effective.     

新城疫病毒D817对裸小鼠人结肠癌移植瘤的抑制作用

Objective To study the anti-tumor effects of Newcastle disease virus (NDV) strain D817 on human colon carcinoma model in nude mice. Methods The nude mouse model of human colon carcinoma was established by subcutaneous inoculation of human colon cancer LOVO cells. The tumor-bearing mice were given PBS, 5-Fu, high-dose NDV D817, moderate-dese NDV D817 or low-dose NDV D817 via caudal vein injection. The tumor size and weight of mice were measured. The liver damages were examined by histopathology. Apoptosis and necrosis of tumor ceils were detected by flow cytometry. The endotumoral content of TNF-α was detected using a mouse TNF-a ELISA kit. The live vires was detected by bemagglutination (HA) test. Results The moderate-dose NDV D817 inhibited the tumor growth more apparently than 5-Fu. The tumor growth inhibition rate reached to 48.1%. The liver damage and the weight change caused by NDV were less severe. NDV D817 made an increased apoptosis index and induced production of TNF-α. Live virus was not detected in important organs except in the tumor of nude mice by HA test. Conclusion In the anti-tumor process in nude mice bearing xenografts of human colon carcinoma, a suitable dose of NDV D817 is more safe and effective.     

1例HSV-IgM、IgG阳性妇女妊娠结局的追踪调查

TORCH是一组病原微生物的英文名称字头组合,TO代表刚地弓形虫,R代表风疹病毒,C代表巨细胞病毒,H代表单纯性疱疹病毒.孕妇感染其中任何一种病毒均可能通过胎盘、产道或母乳传染给胎儿或新生儿,导致流产、早产、死胎或胎儿生长迟缓和畸形,新生儿感染可造成智力障碍、瘫痪、失明以及失聪等严重后遗症.本文追踪1例孕前感染TORCH的患者,观察其积极进行科学的综合的治疗后再妊娠,是否有良好结局.     

新城疫病毒D817对裸小鼠人结肠癌移植瘤的抑制作用

Objective To study the anti-tumor effects of Newcastle disease virus (NDV) strain D817 on human colon carcinoma model in nude mice. Methods The nude mouse model of human colon carcinoma was established by subcutaneous inoculation of human colon cancer LOVO cells. The tumor-bearing mice were given PBS, 5-Fu, high-dose NDV D817, moderate-dese NDV D817 or low-dose NDV D817 via caudal vein injection. The tumor size and weight of mice were measured. The liver damages were examined by histopathology. Apoptosis and necrosis of tumor ceils were detected by flow cytometry. The endotumoral content of TNF-α was detected using a mouse TNF-a ELISA kit. The live vires was detected by bemagglutination (HA) test. Results The moderate-dose NDV D817 inhibited the tumor growth more apparently than 5-Fu. The tumor growth inhibition rate reached to 48.1%. The liver damage and the weight change caused by NDV were less severe. NDV D817 made an increased apoptosis index and induced production of TNF-α. Live virus was not detected in important organs except in the tumor of nude mice by HA test. Conclusion In the anti-tumor process in nude mice bearing xenografts of human colon carcinoma, a suitable dose of NDV D817 is more safe and effective.     

Changes and their significances of IFN-γ, TNF-α and IL-2 level in mouse peripheral blood following intraperitoneal injection with influenza viruses

Objective To observe changes of IFN-γ, TNF-α and IL-2 levels in mouse peripheral blood following intraperitoneal injection with influenza viruses. Methods Mice were divided into 3 groups randomly and injected with human H3N2 influenza virus, avian H9N2 influenza virus and sterilized virus-free allantoic fluid, respectively. Sera in different groups were collected at several time points after virus injection, and the levels of IFN-γ, TNF-α and IL-2 in peripheral blood were tested by sandwich ELISA. Statistical analysis was made using analysis of variance and LSD-t test. Results The levels of IFN-γ and IL-2 in peripheral blood in influenza viruses injection groups were significantly higher than those in negative control group, and no significant difference in TNF-α level was found between influenza viruses injection groups and negative control group. Conclusion Intraperitoneal injection with human or avian influenza viruses can promote the production of IFN-γ and IL-2 in mouse peripheral blood, but it has little effect on the production of TNF-α.