利培酮氯丙嗪对首发精神分裂症患者眼动分析NEF的影响

目的探讨眼动分析中凝视点数和反应性探索分析能否作为首发精神分裂症患者的诊断和治疗效果的客观依据以及这两种指标是否受不同抗精神病药物治疗的影响。方法将符合入组标准的53例精神分裂症患者随机分为氯丙嗪组24例、利培酮组29例进行治疗,疗程6w。随机抽取30例正常健康者为对照组,于患者组治疗前及治疗6w末测评三组眼动分析中凝视点数来分析其认知功能的改善情况。结果氯丙嗪组、利培酮组眼动分析中凝视点数评分均显著低于对照组(P<0.01),治疗6w末凝视点数评分虽有显著升高(P<0.01),但仍均显著低于对照组,差异均有极显著性(P<0.01)。结论凝视点数测评可作为首发精神分裂症患者诊断和判定疗效的客观依据,并且可能受药物的影响。     

通过设计发夹RNA抑制HIV病毒NEF基因表达的实验研究

目的 实验研究shRNA能否抑制宿主细胞Hele细胞中NEF基因的表达.方法 给HIV病毒宿主细胞Hele细胞加入预先设计好的4对shRNA,同时设置对照组,提取细胞总RNA和细胞总蛋白,设计NEF和GAPDH的引物,利用SYBR Green实时荧光定量PCR检测NEF的基因水平,利用western blotting检测NEF的蛋白水平.结果 定量PCR和Western-blot方法检测显示,NEF-miRNA-1、NEF-miRNA-2、NEF-miRNA-3、NEF-miRNA-4干扰质粒对靶基因mRNA表达都有抑制作用,其中NEF-miRNA-3干扰质粒抑制作用最显,抑制率达87％.结论 可以通过设计shRNA去抑制HIV病毒的复制.     

Heat shock proteins: Cellular and molecular mechanisms in the central nervous system

Emerging evidence indicates that heat shock proteins (HSPs) are critical regulators in normal neural physiological function as well as in cell stress responses. The functions of HSPs represent an enormous and diverse range of cellular activities, far beyond the originally identified roles in protein folding and chaperoning. HSPs are now understood to be involved in processes such as synaptic transmission, autophagy, ER stress response, protein kinase and cell death signaling. In addition, manipulation of HSPs has robust effects on the fate of cells in neurological injury and disease states. The ongoing exploration of multiple HSP superfamilies has underscored the pluripotent nature of HSPs in the cellular context, and has demanded the recent revamping of the nomenclature referring to these families to reflect a re-organization based on structure and function. In keeping with this re-organization, we first discuss the HSP superfamilies in terms of protein structure, regulation, expression and distribution in the brain. We then explore major cellular functions of HSPs that are relevant to neural physiological states, and from there we discuss known and proposed HSP impacts on major neurological disease states. This review article presents a three-part discussion on the array of HSP families relevant to neuronal tissue, their cellular functions, and the exploration of therapeutic targets of these proteins in the context of neurological diseases.     

RA诱导SH—SY5Y细胞分化中NEF3基因表达的调控

目的 研究全反式维甲酸(RA)诱导神经母细胞瘤分化过程中NEF3表达的调控.方法 用RA诱导神经母细胞SH-SY5Y,用实时RT-PCR分析NEF3和BrgI的mRNA表达;并同时测定RGI蛋白的表达.共转染含有2.8kb NEF3上游序列的报告基因质粒、Brg1的表达质粒或者其负显性突变质粒,检测后两者对NEF3-CAT启动子活性的调控.结果 RA诱导12～24h,SH-SY5Y细胞中NEF3与Brg1几乎同时表达出现第1个高峰,之后表达量下降.共转染结果 显示Brgl可促进NEF3-CAT表达增加,而其突变型没有作用.结论 RA诱导初期,染色质重塑复合物ATP酶亚基Brg1可能导致NEF3上游调控序列所处的染色质结构发生改变,从而有利于NEF3基因的表达.     

Schistosoma mansoni: gene expression of the nucleotide excision repair factor 2 (NEF2) during the parasite life cycle, and in adult worms after exposure to different DNA-damaging agents

DNA is often damaged by many environmental agents, which lead to the up-regulation of several genes involved in different repair pathways. Schistosoma mansoni has a complex life cycle, being exposed to a subset of DNA-damaging agents, such as those present in the environment and host immune response. Recently, studies showed that nucleotide excision repair (NER) is an indispensable mechanism for removing a broad spectrum of different DNA lesions. In the present report, we showed the gene expression of nucleotide excision repair factor 2 (NEF2) SmRad23 and SmRad4, in different developmental stages of S. mansoni, as well as the differential expression of these genes in S. mansoni adult worms treated with DNA-damaging agents. Furthermore, it was revealed the correlation of these genes with their orthologues in other eukaryotes. Our reports suggest that NER is an important repair pathway during the complex life cycle of S. mansoni.     

高效液相色谱法测定大鼠血浆和肝脏匀浆中甲基莲心碱浓度

目的：建立测定大鼠血浆和肝脏匀浆中甲基莲心碱浓度的高效液相色谱法。方法：大鼠血浆和肝脏匀浆样品经乙醚萃取，进样分析。采用Hypersil BDS C18（4．0mm×250mm，5μm）柱分离。以甲醇-磷酸二氢钾缓冲液-三乙胺（71：29：0．002）为流动相，检测波长为282nm。结果：血浆中甲基莲心碱的线性范围为31．25pμg·L^-1～2．00mg·L^-1；日内和日间RSD分别为小于8.0％和5．0％，绝对回收率为77．45％～89．23％。其在肝脏匀浆中的线性范围为62．5μg·L^-1～16．0mg·L^-1，日内和日间RSD均小于3．0％，绝对回收率为73．53%～88．43％。结论：该方法符合生物样品的检测要求，可应用于大鼠血浆和肝脏匀浆中甲基莲心碱浓度的测定。