脂蛋白酯酶(Lipoprotein lipase,LPL)主要由脂肪和肌肉组织的实质细胞产生,脂解毛细血管中血浆脂蛋白的甘油三酯。多年来,关于LPL是如何从细胞间隙转运至毛细血管内皮细胞上,一直不清楚。最新研究结果表明,在LPL从细胞间隙向毛细血管内...脂蛋白酯酶(Lipoprotein lipase,LPL)主要由脂肪和肌肉组织的实质细胞产生,脂解毛细血管中血浆脂蛋白的甘油三酯。多年来,关于LPL是如何从细胞间隙转运至毛细血管内皮细胞上,一直不清楚。最新研究结果表明,在LPL从细胞间隙向毛细血管内皮细胞转运的过程中,糖基化磷脂酰肌醇锚定高密度脂蛋白结合蛋白1(Gly-cosylphosphatidylinositol-anchored high density lipoprotein-binding protein 1,GPIHBP1)发挥着重要的作用。当GPIHBP1缺失时,LPL被错误定位于细胞间隙,导致动物机体出现严重的高甘油三酯血症。Gpihbp1基因突变可致人患高甘油三酯血症。本文就GPIHBP1分子在动物机体健康和疾病状况下的生理作用机理的研究进展进行了综述,同时也对富含甘油三酯脂蛋白脂解代谢中一些尚需解决的问题进行了讨论。展开更多
Background： Identification of functional genes affecting milk production traits is very crucial for improving breeding efficiency in dairy cattle. Many potential candidate genes have been identified through our previ...Background： Identification of functional genes affecting milk production traits is very crucial for improving breeding efficiency in dairy cattle. Many potential candidate genes have been identified through our previous genome wide association study （GWAS）. Of these, GPIHBP1 is an important novel candidate gene for milk production traits. However, the mRNA structure of the bovine GPIHBP1 gene is not fully determined up to now. Results： In this study, we identified a novel alternatively splice transcript variant （XS） which leads to a 3] bp insertion in exon 3 and also confirmed the other four existed transcripts （X1, X2, X3 and X4） of the bovine GPIHBP1 gene. We showed that transcript X5 with a 31 bp insertion and transcript X1 with an 8 bp deletion might have tremendous effect on the protein function and structure of GPIHBP1, respectively. With semi-quantitative PCR and quantitative real-time RT-PCR, we found that the mRNA expression of GPIHBPI, GPIHBP1-X1 and GPIHBP1-X5 in mammary gland of lactating cows were much higher than that in other tissues. Conclusions： Our study reports a novel alternative splicing of GPIHBP1 in bovine for the first time and provide useful information for the further functional analyses of GPIHBP1 in dairy cattle.展开更多
近年研究发现,脂蛋白脂酶(lipoprotein lipase,LPL)水解血浆富含甘油三酯的脂蛋白这一脂解过程中,糖基化磷脂酰肌醇锚定高密度脂蛋白结合蛋白1(glycosylphosphatidylinositol-anchoredhigh density lipoprotein-binding protein 1,GPIHB...近年研究发现,脂蛋白脂酶(lipoprotein lipase,LPL)水解血浆富含甘油三酯的脂蛋白这一脂解过程中,糖基化磷脂酰肌醇锚定高密度脂蛋白结合蛋白1(glycosylphosphatidylinositol-anchoredhigh density lipoprotein-binding protein 1,GPIHBP1)起到了非常重要的作用。它能够结合LPL和乳糜微粒,发挥脂解平台的作用;同时它也参与LPL向毛细血管内皮细胞的转运。GPIHBP1基因敲除小鼠和GPIHBP1基因突变的病人发生严重高乳糜微粒血症。GPIHBP1的发现丰富了人们对于血浆脂蛋白代谢的认识,并为治疗高乳糜微粒血症提供了新的途径。展开更多
文摘脂蛋白酯酶(Lipoprotein lipase,LPL)主要由脂肪和肌肉组织的实质细胞产生,脂解毛细血管中血浆脂蛋白的甘油三酯。多年来,关于LPL是如何从细胞间隙转运至毛细血管内皮细胞上,一直不清楚。最新研究结果表明,在LPL从细胞间隙向毛细血管内皮细胞转运的过程中,糖基化磷脂酰肌醇锚定高密度脂蛋白结合蛋白1(Gly-cosylphosphatidylinositol-anchored high density lipoprotein-binding protein 1,GPIHBP1)发挥着重要的作用。当GPIHBP1缺失时,LPL被错误定位于细胞间隙,导致动物机体出现严重的高甘油三酯血症。Gpihbp1基因突变可致人患高甘油三酯血症。本文就GPIHBP1分子在动物机体健康和疾病状况下的生理作用机理的研究进展进行了综述,同时也对富含甘油三酯脂蛋白脂解代谢中一些尚需解决的问题进行了讨论。
基金financially supported by the National Natural Science Foundations of China[31201772]Chinese Universities Scientific Fund [2014JD021]+2 种基金the 948 Program of the Ministry of Agriculture of China [2011-G2A(3)]the National High Technology Research and Development Program of China[863 Program 2011AA100302]the Program for Changjiang Scholars and Innovative Research Team in University(IRT1191)
文摘Background： Identification of functional genes affecting milk production traits is very crucial for improving breeding efficiency in dairy cattle. Many potential candidate genes have been identified through our previous genome wide association study （GWAS）. Of these, GPIHBP1 is an important novel candidate gene for milk production traits. However, the mRNA structure of the bovine GPIHBP1 gene is not fully determined up to now. Results： In this study, we identified a novel alternatively splice transcript variant （XS） which leads to a 3] bp insertion in exon 3 and also confirmed the other four existed transcripts （X1, X2, X3 and X4） of the bovine GPIHBP1 gene. We showed that transcript X5 with a 31 bp insertion and transcript X1 with an 8 bp deletion might have tremendous effect on the protein function and structure of GPIHBP1, respectively. With semi-quantitative PCR and quantitative real-time RT-PCR, we found that the mRNA expression of GPIHBPI, GPIHBP1-X1 and GPIHBP1-X5 in mammary gland of lactating cows were much higher than that in other tissues. Conclusions： Our study reports a novel alternative splicing of GPIHBP1 in bovine for the first time and provide useful information for the further functional analyses of GPIHBP1 in dairy cattle.
文摘近年研究发现,脂蛋白脂酶(lipoprotein lipase,LPL)水解血浆富含甘油三酯的脂蛋白这一脂解过程中,糖基化磷脂酰肌醇锚定高密度脂蛋白结合蛋白1(glycosylphosphatidylinositol-anchoredhigh density lipoprotein-binding protein 1,GPIHBP1)起到了非常重要的作用。它能够结合LPL和乳糜微粒,发挥脂解平台的作用;同时它也参与LPL向毛细血管内皮细胞的转运。GPIHBP1基因敲除小鼠和GPIHBP1基因突变的病人发生严重高乳糜微粒血症。GPIHBP1的发现丰富了人们对于血浆脂蛋白代谢的认识,并为治疗高乳糜微粒血症提供了新的途径。
