目的分析急性心肌梗死(AMI)患者入院24 h内血清中剪切型X-盒结合蛋白1(Spliced x box binding protein 1,XBP-1S)浓度与患者基本资料、临床指标及影像学指标的相关性。方法按XBP-1S血清浓度中位数164.7 pg/ml,将AMI患者86例分成2组:低...目的分析急性心肌梗死(AMI)患者入院24 h内血清中剪切型X-盒结合蛋白1(Spliced x box binding protein 1,XBP-1S)浓度与患者基本资料、临床指标及影像学指标的相关性。方法按XBP-1S血清浓度中位数164.7 pg/ml,将AMI患者86例分成2组:低表达组(<164.7 pg/ml,n=43)和高表达组(≥164.7 pg/ml,n=43),收集患者基本资料,临床资料和冠状动脉造影影像学资料进行组间比较。XBP-1S血清浓度与资料间的相关分析;结果组间比较发现高表达组糖尿病患病率显著高于低表达组(P <0.05);高表达组与低表达组两组冠状动脉粥样硬化病变血管分支数构成比有相关关系(P <0.05);XBP-1S血清浓度与血管的分支数呈正相关。结论在糖尿病患病率高的患者组中AMI起病急性期内血清中XBP-1S可能表达增高明显,并且与病变血管的分支数呈正相关。展开更多
目的 :越来越多的文献显示脂质代谢参与肿瘤的发生发展,但在口腔鳞癌的关系中尚未见报道,故本文拟通过检测脂质代谢转运相关蛋白ATP结合盒转运蛋白A1(ATP-binding cassette transporter A1,ABCA1)和载脂蛋白A(apolipoprotein A-I,Apo A...目的 :越来越多的文献显示脂质代谢参与肿瘤的发生发展,但在口腔鳞癌的关系中尚未见报道,故本文拟通过检测脂质代谢转运相关蛋白ATP结合盒转运蛋白A1(ATP-binding cassette transporter A1,ABCA1)和载脂蛋白A(apolipoprotein A-I,Apo A I)及脂质代谢吸收蛋白B类1型清道夫受体(Scavenger receptor class B type I,SR-B1)在口腔鳞癌组织中的差异性表达,探讨脂质转运蛋白和吸收蛋白是否在口腔鳞癌中存在失衡表达,及其与临床病理参数之间的关系及意义。方法:收集石河子大学医学院第一附属医院2004-2016年有完整临床病理资料的口腔鳞癌患者24例及正常口腔黏膜患者35例,制备组织芯片2张,应用免疫组织化学检测ABCA1,Apo A I和SR-B1的表达水平,并结合患者临床病理特征进行分析。结果:(1)ABCA1蛋白在口腔鳞癌(37.50%,9/24)中较正常鳞状上皮(0%,0/25)高表达,差异具有统计学意义(χ2=11.484,P=0.001);Apo A I蛋白在两者之间均高表达(100%,24/24),SR-B1蛋白在两者中均不表达或低表达(0%,0/18),差异均无统计学意义;(2)在口腔鳞癌中ABCA1和SR-B1存在负相关(r=-0.452,P=0.003),Apo A I和SR-B1存在负相关(r=-1.000,P<0.01),ABCA1和Apo A I存在正相关(r=0.674,P<0.01);(3)ABCA1蛋白的表达与口腔鳞癌患者年龄相关,差异有统计学意义。结论:ABCA1蛋白的高表达可能参与了口腔鳞癌脂质代谢的失衡。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
文摘目的 :越来越多的文献显示脂质代谢参与肿瘤的发生发展,但在口腔鳞癌的关系中尚未见报道,故本文拟通过检测脂质代谢转运相关蛋白ATP结合盒转运蛋白A1(ATP-binding cassette transporter A1,ABCA1)和载脂蛋白A(apolipoprotein A-I,Apo A I)及脂质代谢吸收蛋白B类1型清道夫受体(Scavenger receptor class B type I,SR-B1)在口腔鳞癌组织中的差异性表达,探讨脂质转运蛋白和吸收蛋白是否在口腔鳞癌中存在失衡表达,及其与临床病理参数之间的关系及意义。方法:收集石河子大学医学院第一附属医院2004-2016年有完整临床病理资料的口腔鳞癌患者24例及正常口腔黏膜患者35例,制备组织芯片2张,应用免疫组织化学检测ABCA1,Apo A I和SR-B1的表达水平,并结合患者临床病理特征进行分析。结果:(1)ABCA1蛋白在口腔鳞癌(37.50%,9/24)中较正常鳞状上皮(0%,0/25)高表达,差异具有统计学意义(χ2=11.484,P=0.001);Apo A I蛋白在两者之间均高表达(100%,24/24),SR-B1蛋白在两者中均不表达或低表达(0%,0/18),差异均无统计学意义;(2)在口腔鳞癌中ABCA1和SR-B1存在负相关(r=-0.452,P=0.003),Apo A I和SR-B1存在负相关(r=-1.000,P<0.01),ABCA1和Apo A I存在正相关(r=0.674,P<0.01);(3)ABCA1蛋白的表达与口腔鳞癌患者年龄相关,差异有统计学意义。结论:ABCA1蛋白的高表达可能参与了口腔鳞癌脂质代谢的失衡。
文摘目的:观察氧化型低密度脂蛋白(oxidized low-density lipoprotein,ox-LDL)干预是否刺激分化成熟的3T3-L1脂肪细胞胆固醇流出,并探讨其机制。方法:3T3-L1细胞促分化成熟后,给予不同浓度的ox-LDL(0～50μg/mL)干预8或24h;在以25μg/mL ox-LDL预处理脂肪细胞24h后,再以10μmol/L22(R)-羟基胆固醇干预24h,收集细胞,采用逆转录聚合酶链反应(reverse transcription polymer-ase chain reaction,RT-PCR)测定脂肪细胞三磷酸腺苷结合盒转运体A1(ATP binding cassette transporterA1,ABCA1),B族I型清道夫受体(scavenger receptor class B type I,SR-BI)和肝X受体α(liver X receptorα,LXRα)mRNA表达,采用液体闪烁计数器检测载脂蛋白A-I(apolipoprotein A-I,apoA-I)介导的细胞内胆固醇流出。结果:低浓度ox-LDL(12.5～25μg/mL)干预24h可增加脂肪细胞ABCA1,LXRα和SR-BImRNA的表达,并促进apoA-I介导的胆固醇流出,而高浓度(50μg/mL)则无此作用。将脂肪细胞用25μg/mL ox-LDL预处理24h,再用10μmol/L22(R)-羟基胆固醇干预细胞,ABCA1和LXRαmRNA表达均有显著增加(P<0.01),同时apoA-I介导的胆固醇流出增加,而SR-BImRNA表达无明显改变。结论:低浓度ox-LDL不仅可促进脂肪细胞LXRα-ABCA1-apoA-I通路,还可上调SR-BI表达,加速细胞内胆固醇流出。Ox-LDL这种新的作用不仅有利于维持脂肪细胞内胆固醇的动态平衡,还可能具有抗动脉粥样硬化作用。
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.
