边缘细胞(side population cel1s)是一类可以特异性地将Hoechst33342染料快速泵出细胞外的细胞,广泛分布于多种正常组织、肿瘤组织和细胞系中,被作为一种通用的干细胞表型标记。近年来对边缘细胞的研究和应用都取得了很大的进展,该文就...边缘细胞(side population cel1s)是一类可以特异性地将Hoechst33342染料快速泵出细胞外的细胞,广泛分布于多种正常组织、肿瘤组织和细胞系中,被作为一种通用的干细胞表型标记。近年来对边缘细胞的研究和应用都取得了很大的进展,该文就边缘细胞的生物学特征、分子机制、分选方法和应用等方面的研究进展作如下综述。展开更多
Niemann-pick protein C1(NPC1) is a large integral membrane glycoprotein that resides in late endosomes,whereas niemann-pick protein C2(NPC2) is a small soluble protein found in the lumen of lysosomes.NPC1 protein is b...Niemann-pick protein C1(NPC1) is a large integral membrane glycoprotein that resides in late endosomes,whereas niemann-pick protein C2(NPC2) is a small soluble protein found in the lumen of lysosomes.NPC1 protein is believed to facilitate the transport of lipids,particularly cholesterol,from late endosomes/lysosomes to the Golgi apparatus,endoplasmic reticulum and plasma membrane.NPC2 primarily plays a role in the egress of cholesterol and glycolipids from lysosomes.Mutations in either NPC1 or NPC2 result in aberrant lipid transport from endocytic compartments,which results in lysosomal storage of a complex mixture of lipids,primarily cholesterol and glycosphingolipids.The NPC proteins regulate sterol homeostasis through production of LDL cholesterol-derived oxysterols.Oxysterols are endogenous ligands for the liver X receptors(LXRs),which can upregulate ATP binding cassette transporter A1(ABCA1) expression.ABCA1 may have antiatherogenic effects through the efflux of it-mediated cholesterol.Meanwhile,NPC1 heterozygote mutation confers substantial resistance to lesional necrosis and lesional macrophage apoptosis.Study of the NPC proteins will help us for further understanding of the mechanisms involved in atherogenesis.展开更多
文摘边缘细胞(side population cel1s)是一类可以特异性地将Hoechst33342染料快速泵出细胞外的细胞,广泛分布于多种正常组织、肿瘤组织和细胞系中,被作为一种通用的干细胞表型标记。近年来对边缘细胞的研究和应用都取得了很大的进展,该文就边缘细胞的生物学特征、分子机制、分选方法和应用等方面的研究进展作如下综述。
文摘Niemann-pick protein C1(NPC1) is a large integral membrane glycoprotein that resides in late endosomes,whereas niemann-pick protein C2(NPC2) is a small soluble protein found in the lumen of lysosomes.NPC1 protein is believed to facilitate the transport of lipids,particularly cholesterol,from late endosomes/lysosomes to the Golgi apparatus,endoplasmic reticulum and plasma membrane.NPC2 primarily plays a role in the egress of cholesterol and glycolipids from lysosomes.Mutations in either NPC1 or NPC2 result in aberrant lipid transport from endocytic compartments,which results in lysosomal storage of a complex mixture of lipids,primarily cholesterol and glycosphingolipids.The NPC proteins regulate sterol homeostasis through production of LDL cholesterol-derived oxysterols.Oxysterols are endogenous ligands for the liver X receptors(LXRs),which can upregulate ATP binding cassette transporter A1(ABCA1) expression.ABCA1 may have antiatherogenic effects through the efflux of it-mediated cholesterol.Meanwhile,NPC1 heterozygote mutation confers substantial resistance to lesional necrosis and lesional macrophage apoptosis.Study of the NPC proteins will help us for further understanding of the mechanisms involved in atherogenesis.
