模式识别受体与肝脏疾病

天然免疫系统发挥防御作用的关键是对病原体的识别,这一识别主要由模式识别受体(patternrecognition receptors,PRR)完成.     

Activity identification of chimeric anti-caspase-3 mRNA hammerhead ribozyme in vitro and in vivo

To study the expression activity of various vectors containing anti-caspase-3 ribozyme cassettesin vivo, and to further study the role of caspas-3 in the apoptotic pathway, we constructed anti-caspase-3 hammerhead ribozyme embedded into the human snRNA U6, and detected the activity of the ribozymein vitro andin vivo. Meanwhile we compared it with the self-cleaving hammerhead ribozymes that we previously studied, and with the general ribozyme, cloned into RNA polymerase II expression systems. The results showed that the three ribozymes, p1.5RZ107, pRZ107 and pU6RZ107 had the correct structure, and that they could cleave caspase-3 mRNA exactly to produce two fragments: 143nt/553nt. p1.5RZ107 has the highest cleavage efficiencyin vitro, almost 80%. However, the U6 chimeric ribozyme, pU6RZ107, has the highest cleavage activityin vivo, almost to 65%, though it has lower cleavage activityin vitro. The cleavage results demonstrated that the pU6RZ107, the U6 chimeric ribozyme, could more efficiently express and downregulate the level of caspase-3in vivo, and the ribozyme could provide an alternative approach to the research into the mechanism of apoptosis and human gene therapy also.     

浅谈制药企业的OOS调查

2010版GMP提出了OOS的概念。本文浅谈OOS调查的内容、方式,以保证在检验工作中出现的超标结果能得到全面的分析和正确的处理,保证检验数据的可靠性,从而降低药品的质量风险。     

正常人肝脏星形细胞的分离,培养及鉴定

参考Friedman等分离人肝脏星形细胞(HSC)的方法,采用校正密度的淋巴细胞分离液进行一步梯度离心,成功地分离得到了正常人HSC。HSC的收获量约为1×10~7个/10克肝脏组织,存活率在95％以上,纯度达85％以上。传代后纯度接近100％。对人HSC的标志物进行检测发现,结蛋白不宜作为鉴定初分离的及原代培养初期人HSC纯度的指标,而α-平滑肌肌动蛋白可作为鉴定激活的人HSC的可靠指标。     

急诊重症监护病房耐甲氧西林金黄色葡萄球菌定植与感染调查分析

目的 调查急诊重症监护病房( EICU)耐甲氧西林金黄色葡萄球菌(MRSA)定植与感染状况,为实时控制医院感染暴发流行提供参考依据.方法 对临床资料进行分析,环境卫生学监测采样方法参照卫生部《消毒技术规范》,制定干预措施.结果 6例MRSA定植和感染病例平均年龄62.5岁,原发性基础疾病重;41份环境标本和16份来自接触阳性患者的医务人员手部标本中均分离到病原菌,阳性率分别为24.39％和18.75％.结论MRSA定植是造成医院感染的源头,将仅出现定植的病例并入感染病例进行统计分析,可实时监控院内医院感染的暴发.     

乙型肝炎抗病毒治疗新进展

慢性乙型肝炎的抗病毒治疗发展迅速,本文就抗病毒治疗,包括干扰素类、核苷类似物、分子治疗药物的新进展作一综述.     

中频交变微电流联合紫杉醇抗A549细胞作用的研究

目的:研究中频交变微电流联合紫杉醇注射液抗A549细胞的作用及机制。方法:对处于对数生长期的肺腺癌A549细胞施加电刺激、紫杉醇及电刺激联合紫杉醇三种不同处理,采用MTT法检测A549细胞存活率,并利用流式细胞仪测量分析各组细胞凋亡/死亡比例及细胞周期状态。结果:通过不同参数的中频交变微电流刺激A549细胞,得到的最低细胞存活率(参数150 kHz、90 m A、30 min)为78.02±0.73%(P<0.01);联合紫杉醇注射液半抑制浓度(IC50)干预后,细胞存活率为32.87±0.94%(P<0.01);同时发现中频交变微电流联合紫杉醇注射液能促进A549细胞凋亡,阻滞细胞于S期、G2/M期。结论:中频交变微电流可抑制A549细胞增殖、促进凋亡,但对细胞周期影响不明显;与紫杉醇注射液联合应用时具有协同增强抗肿瘤作用。     

慢性乙型肝炎抗病毒药物的选择

慢性乙型肝炎抗病毒治疗的研究有了明显的进展.1998年前,抗乙型肝炎病毒(HBV)注册药物只有标准α干扰素;1998年之后,核苷(酸)类似物拉米夫定、阿德福韦酯、恩替卡韦和替比夫定相继用于临床;2005年聚乙二醇化干扰素α-2a(PAGasys)批准上市用于慢性乙型肝炎治疗.这些研究的进展,一方面使临床医生在慢性乙型肝炎抗病毒治疗时有了更多的选择,另一方面也使临床医生在决定治疗方案时面临困难.     

Activity identification of chimeric anti-caspase-3 mRNA hammerhead ribozyme in vitro and in vivo

To study the expression activity of various vectors containing anti-caspase-3 ribozyme cassettes in vivo, and to further study the role of caspas-3 in the apoptotic pathway, we constructed anti-caspase-3 hammerhead ribozyme embedded into the human snRNA U6, and detected the activity of the ribozyme in vitro and in vivo. Meanwhile we compared it with the self-cleaving hammerhead ribozymes that we previously studied, and with the general ribozyme, cloned into RNA polymerase II expression systems. The results showed that the three ribozymes, p1.5RZ107, pRZ107 and pU6RZ107 had the correct structure, and that they could cleave cas-pase-3 mRNA exactly to produce two fragments: 143nt/553nt. p1.5RZ107 has the highest cleavage efficiency in vitro, almost 80%. However, the U6 chimeric ribozyme, pU6RZ107, has the highest cleavage activity in vivo, almost to 65%, though it has lower cleavage activity in vitro. The cleavage results demonstrated that the pU6RZ107, the U6 chimeric ribozyme, could more efficiently expre     

毛泡桐与白花泡桐正反交F1无性系自然接干性状的遗传变异

利用田间实验和统计分析方法,研究了毛泡桐[Paulownia tomentosa（Thunb．）Steud．]与白花泡桐[P.fortunei（Seem．）Hemsl．]正反交F1无性系自然接干性状的遗传变异。结果表明,供试的11个F1无性系的22个自然接干性状具有广泛而明显的遗传变异和变异差异,其中接干高、全干高、接干材积、全干材积、接干材秽全干材积、通直度和丛枝病等级是变异最大的7个自然接干性状（CV〉30）;在6个正交F1无性系间和5个反交F1无性系间,绝大多数自然接干性状的差异达极显著水平;在毛泡桐与白花泡桐正交F1无性系和反交F1无性系间,22个自然接干性状均存在极显著差异。