Synaptosomal Glutamate Uptake Declines Progressively in the Spinal Cord of a Mutant Mouse with Motor Neuron Disease

Abstract: It has been suggested that the degeneration of motor neurons in amyotrophic lateral sclerosis is a consequence of excitotoxicity resulting from a loss of synaptosomal glutamate uptake. The role of synaptosomal glutamate uptake in the pathogenesis of motor neuron disease was studied in the Mnd mouse. Glutamate uptake in spinal-cord synaptosomes declined in parallel with the onset of behavioral deficits in Mnd mice but lagged considerably behind the appearance of pathology in motor neurons. Glutamate uptake did not decline significantly in corpus striatum, and GABA uptake did not change significantly in either spinal cord or striatum. The presence of pronounced histopathological changes before the loss of glutamate uptake suggests that the decline of glutamate uptake is a consequence rather than the primary cause of motor neuron disease in the Mnd mouse.     

阿托伐他汀对冠心病患者循环内皮祖细胞数量与分化相关功能的影响

目的:观察冠心病患者循环内皮祖细胞数量与分化相关功能的变化特点,探讨体外条件下不同浓度阿托伐他汀对冠心病患者循环内皮祖细胞数量和增值,黏附,迁移等分化相关功能的影响。方法:以16例条件齐同的非冠心病患者作对照,观察16例冠心病患者循环内皮祖细胞数量与功能的变化,体外条件下不同浓度阿托伐他汀处理冠心病患者循环内皮祖细胞。结果:冠心病患者外周血内皮祖细胞的数量与功能下降,阿托伐他汀呈浓度依赖性提高冠心病患者内皮祖细胞的数量与增值,黏附,迁移等分化相关功能;阿托伐他汀对内皮祖细胞分化相关功能的改善作用大于对其数量的影响。结论:阿托伐他汀可上调冠心病患者循环内皮祖细胞的数量与分化相关功能,且以改善功能为主。     

2014年陕西省柯萨奇病毒A10型相关手足口病的流行特征和其VP1区基因特征研究

了解陕西省手足口病(Hand,foot and mouth disease,HFMD)的致病病原体柯萨奇病毒A10型(CV-A10)的流行特征及VP1区基因特征。对2014年收集的HFMD病例标本,通过荧光定量PCR检测确定肠道病毒型别,对CV-A10引起的HFMD流行特征进行描述性分析。使用RD细胞进行病毒分离,RT-PCR扩增CV-A10的VP1区基因片段并进行序列测定,使用Meg Align软件进行核苷酸及氨基酸的同源性分析,并使用MEGA5.0软件构建系统进化树。2014年CV-A10是陕西HFMD病原谱中的第三大病原,占其他肠道病毒的57.71%,13例重症HFMD病例的致病病原体鉴定为CV-A10,占重症病例的9.03%。CV-A10感染HFMD病例以≤3岁年龄组儿童为主(83.07%),男女性别比为1.15∶1。发病时间主要集中在4～7月。实验室分离出101株CV-A10,覆盖全省10市(区)。完成测序的18株CV-A10核苷酸和氨基酸同源性分别为94.0%～100.0%和97.3%～100.0%,与A型原型株的核苷酸和氨基酸同源性分别为76.2%～77.5%和91.9%～93.0%,与近年来河北、湖南和河南地区流行株具有较高的同源性。系统进化显示陕西CV-A10分离株属于C基因型。CV-A10是2014年陕西HFMD的优势病原,能引起重症HFMD,本次分离到的CV-A10毒株均属于C基因型。