目的 探索利美尼定(RIL)对肌萎缩侧索硬化(ALS)相关蛋白质TAR DNA结合蛋白43(TDP-43)降解的影响.方法 用瞬时转染的方法在运动神经元样细胞系NSC-34中过表达WT TDP-43,与家族型ALS相关的Q331K TDP-43、M337V TDP-43突变蛋白、TDP-43的两种C末端片段TDP-25和TDP-35,再给予利美尼定干预16h,通过蛋白印迹方法检测5种TDP-43的表达水平.结果 在自噬诱导剂RIL的作用下,两种突变TDP-43及其C末端片段的表达明显减少,而WT TDP-43的蛋白质表达水平无明显变化.在自噬阻断剂3-MA的干预下,RIL降解异常蛋白质的作用也被阻断.结论 RIL可经由自噬通路降解Q331K TDP-43、M337V TDP-43及其C末端截短片段.

目的 利美尼定对家族性肌萎缩侧索硬化症(ALS)相关突变蛋白质SOD1G93A的作用机制.方法 用瞬时转染的方法在运动神经元样细胞系NSC-34中过表达WTSOD1,与家族型ALS相关的SOD1G93A突变蛋白,再给予自噬通路的特异性诱导剂和阻断剂,通过Western blot蛋白印迹法检测突变SOD1、自噬标记物的蛋白质表达水平.结果 自噬诱导剂trehalose可以使SOD1G93A蛋白质表达水平明显减少.在自噬阻断剂3-甲基腺嘌呤(3-MA)的干预下,SOD1G93A蛋白质表达水平明显升高.l0uM利美尼定能够明显降低G93A SOD1的表达,但对WT SOD1的表达水平无明显影响.结论 SOD1G93A主要经由自噬途径降解,利美尼定能够明显促进G93A SOD1的降解,但对WT SOD1的蛋白质表达水平无明显促进作用.

目的 建立快速检测实验大鼠冠状病毒和仙台病毒的双重PCR方法.方法 根据大鼠冠状病毒N基因、仙台病毒L基因设计特异性引物;经过双重PCR优化,特异性和敏感性的检测,建立双重PCR体系.应用该PCR体系检测人工感染仙台病毒组织DNA样本和实验动物组织样本,并与ELISA方法比对.结果 双重PCR扩增出大鼠冠状病毒(168 bp)和仙台病毒(262 bp)目的条带,PCR扩增产物测序结果利用核酸BLAST功能进行同源序列对比,仙台病毒和大鼠冠状病毒同源性分别为100％和99％.仙台病毒和大鼠冠状病毒的检测下限为1.56×102 copies/μL.特异性检测对小鼠肝炎病毒扩增,产生片段大小近似大鼠冠状病毒产物.应用建立的双重PCR体系检测人工感染仙台病毒组织DNA样本,30份DNA标本均被检出;检测94份实验动物肺组织样本,结果均阴性.结论 建立的双重PCR方法操作简单、快速、特异性强、灵敏度高,能够实现对实验动物仙台病毒和大鼠冠状病毒病原体的快速检测.

Objective Aiming at detecting Staphylococcus aureus、Pseudomonas aeruginosa and Klebsiella pneumoniae in laboratory animals,the paper provides a rapid,sensitive and simple test method.Methods According to Staphylococcus aureus nuc gene,Pseudomonas aeruginosa LasI gene,Klebsiella pneumonia PhoE gene and general 16S rRNA gene, designed specific primers;Through the optimization of multiplex PCR primer concentrations and annealing temperature, the specificity and sensitivity of detection, establishing multiplex PCR system.Application of the PCR system test specimens of artificial infections and experiment animal feces is compared with traditional test method.Results Multiplex PCR amplification of Staphylococcus aureus (153 bp), Pseudomonas aeruginosa (600 bp) with Klebsiella pneumoniae (368 bp) and general (520 bp).The multiplex sensitivity for the purpose of 10pg, specificity of detection was not detected from other pathogens.Application of establishing multiplex PCR system to detect the artificial positive samples, and detect 1 Pseudomonas aeruginosa positive case in 76 fecals.Conclusions This paper established the multiplex PCR method which has the advantages of specific,sensitive,simple and rapid, and provides a reliable way for rapid test in laboratory animals microbiology.

The aim of this study is to establish a multiplex polymerase chain raction (PCR) to identify of four kinds of laboratory animal pathogens: Pasteurella multocida, Bordetella bronchiseptica, Mycoplasma pneumoniae and Klebsiella pneumoniae.Methods Specific primers were designed based on GenBank data.The multiplex PCR system was established through optimization of multiple PCR and detection of its specificity and sensitivity.This technique was used to test artificially infected samples and tracheal secretions of experimental animals (rat, mouse, guinea pig, rabbit, hamster), and comparing the detection results by this method and traditional detection test.Results Target bands of Pasteurella multocida (356 bp), Bordetella bronchiseptica (237 bp), Mycoplasma pneumoniae (266 bp), and Klebsiella pneumoniae (142 bp) were obtained, with a detection sensitivity of Klebsiella pneumoniae of 10 pg, and that of Pasteurella multocida, Bordetella bronchiseptica and Mycoplasma pneumoniae of 1 pg by this newly developed multiplex PCR assay.No target bands were observed from the non-specific pathogens of artificially infected samples.The tracheal secretions taken from 45 experimental animals (mice and rabbits) were tested with this new PCR assay, among which 15 cases of Klebsiella pneumonia and 9 cases of Pasteurella multocida were detected as positive, while all the results of traditional method and serological test were negative.Conclusions A simple, rapid, specific and highly sensitive multiplex PCR system has been successfully established.It is valuable for detection of Pasteurella multocida, Bordetella bronchiseptica, Mycoplasma pneumoniae, and Klebsiella pneumoniae in laboratory animals.

Clostridium piliforme,Mycoplasma pulmonic and Rabbit hemorrhagic disease virus are important pathogenic organism to laboratory animals which cause respiratory system disease and digestive system disease and badly affected to product and animal laboratory. To obtain the better diagnostic ways with high specificity and sensibility,thus the methodology of detecting these pathogenic organisms that national testing standards demands has been summarized.The study suggests that two steps should be taken:the first test in traditional methods and the second test in PCR methods to improve veracity and reliability of testing results.

目的 探讨染色体数目、结构和多态性异常与不孕不育临床表现的关系.方法 按照常规G显带方法制备外周血淋巴细胞染色体,并对其核型进行数目和结构的分析,必要的做C显带和Y染色体微缺失.结果 7658例不孕不育病例中251染色体核型异常,异常率为3.28％,其中数目异常93例,结构异常158例,比例分别为1.22％、2.06％,染色体多态性630例,比例为8.23％.结论 细胞学遗传学对于不孕不育患者在优生优育中具有指导意义.