目的探讨含SUN(Sad,UNC-84)结构域的人睾丸蛋白SPAG4L(sperm-associated antigen 4 like)与具有KASH(Klarsicht,ANC-1 and Syne homology)结构域的核膜血影重复蛋白3(nuclear envelop spectrin repeat proteins 3,Nesprin-3)之间的相互作用。方法用生物信息学方法对SPAG4L蛋白进行分析,通过体外转染实验,观察SPAG4L的亚细胞定位;并用免疫荧光技术、免疫共沉淀和双分子荧光互补实验检测SPAG4L是否与KASH结构域蛋白Nesprin-3存在相互作用。结果生物信息学分析结果表明,SPAG4L蛋白具有跨膜结构;亚细胞定位结果发现,SPAG4L蛋白定位于核膜和胞浆;免疫荧光、免疫共沉淀和双分子荧光互补实验结果表明,SPAG4L蛋白与Nesprin-3蛋白质相互作用,形成LINC(linkers of the nucleoskeleton to the cytoskeleton)复合物。结论 SPAG4L与Nesprin-3能够相互作用,形成LINC复合物,对了解SPAG4L蛋白在精子发生中的作用具有重要的意义。
Functionalized carbon nanotubes （CNTs） were made for the delivery of genes and drugs and CNT-based biosensors. The basis of CNTs is for binding with biomolecules in biomedical applications. The binding tendency with small interfering RNA oligonucleotides and cytotoxicity of cetyltrimethyl ammonium bromide （CTAB）-coated single-walled carbon nanotubes （SWNTs） were studied. The field emission scanning electron microscopy and transmission electron microscopy results show that a SWNT suspension in CTAB solution was well-dispersed and stable. CTAB is the cross-linker between SWNTs and oligonucleotides. The CTAB-coated SWNTs have less cytotoxicity to human umbilical vein endothelial cells than single SWNTs and the cytotoxicity of CTAB-coated SWNTs depended on the concentration of CTAB-coated SWNTs.
目的:调查中国儿童人群内皮细胞蛋白C受体(endothelial protein C receptor,EPCR)基因的单核苷酸多态性是否与川崎病(Kawasaki disease,KD)相关。方法:招募103名KD患者(其中23名患者出现冠状动脉病变)和158名对照组。选择EPCR基因的7个标记单核苷酸多态性(rs6088738,rs2069940,rs2069945,rs2069952,rs867186,rs9574和rs1415774)进行TaqMan等位基因鉴别分析。采用酶联免疫吸附试验(ELISA)检测53名KD和52名健康儿童血浆可溶性EPCR(soluble EPCR,sEPCR)水平。结果:rs2069952,rs9574,rs1415774与KD的发生显著相关,但与冠状动脉病变的发生无关。具有rs2069952,rs9574,rs1415774和rs2069945单核苷酸多态性的男性比女性具有更大的KD风险。KD患儿血浆sEPCR水平不能预测冠状动脉病变的形成,而KD患者rs867186等位基因G与血浆sEPCR水平升高有关。结论:中国汉族儿童EPCR的单核苷酸多态性与KD易感性有关。
