The GPIHBP1-LPL complex is responsible for the margination of triglyceride-rich lipoproteins in capillaries.

The GPIHBP1-LPL complex is responsible for the margination of triglyceride-rich lipoproteins in capillaries.
复制标题

DOI:
10.1016/j.cmet.2014.01.017
复制
发表时间:
2014-05-06
期刊:
影响因子:
29
通讯作者:
Fong LG
Fong LG
中科院分区:
生物学1区
文献类型:
--
作者:
Goulbourne CN;Gin P;Tatar A;Nobumori C;Hoenger A;Jiang H;Grovenor CR;Adeyo O;Esko JD;Goldberg IJ;Reue K;Tontonoz P;Bensadoun A;Beigneux AP;Young SG;Fong LG

文献摘要

参考文献

被引文献

相似文献

富含甘油三酯的脂蛋白(trl)被脂蛋白脂肪酶(LPL)分解,这种酶通过内皮细胞蛋白GPIHBP1转运到毛细血管管腔。为了使lpl介导的脂肪分解发生,trl必须与毛细血管腔结合。这一过程通常被认为与硫酸肝素蛋白聚糖(HSPGs)有关,但我们怀疑TRL边缘化可能需要GPIHBP1。事实上,通过荧光显微镜、红外染料标记脂蛋白定量分析和EM断层扫描来判断,野生型小鼠的心脏毛细血管边缘有trl,而Gpihbp1 - / -小鼠则没有。细胞培养和体内研究均表明,TRL的边缘依赖于与GPIHBP1结合的LPL。值得注意的是,内皮细胞在Gpihbp1−/−小鼠中表达LPL并没有恢复有缺陷的TRL边缘,这意味着LPL与HSPGs结合在促进TRL边缘方面是无效的。我们的研究表明gpihbp1结合的LPL是TRL边缘的主要决定因素。
Triglyceride-rich lipoproteins (TRLs) undergo lipolysis by lipoprotein lipase (LPL), an enzyme that is transported to the capillary lumen by an endothelial cell protein, GPIHBP1. For LPL-mediated lipolysis to occur, TRLs must bind to the lumen of capillaries. This process is often assumed to involve heparan sulfate proteoglycans (HSPGs), but we suspected that TRL margination might instead require GPIHBP1. Indeed, TRLs marginate along the heart capillaries of wild-type but not Gpihbp1−/− mice, as judged by fluorescence microscopy, quantitative assays with infrared-dye–labeled lipoproteins, and EM tomography. Both cell culture and in vivo studies showed that TRL margination depends on LPL bound to GPIHBP1. Of note, the expression of LPL by endothelial cells in Gpihbp1−/− mice did not restore defective TRL margination, implying that the binding of LPL to HSPGs is ineffective in promoting TRL margination. Our studies show that GPIHBP1-bound LPL is the main determinant of TRL margination.
DOI: 10.1016/j.cmet.2010.11.002
发表时间: 2010-12-01
期刊: Cell metabolism
影响因子: 29
作者:
Lichtenstein L;Mattijssen F;de Wit NJ;Georgiadi A;Hooiveld GJ;van der Meer R;He Y;Qi L;Köster A;Tamsma JT;Tan NS;Müller M;Kersten S
通讯作者: Kersten S
DOI: 10.1126/science.3513311
发表时间: 1986-04-04
期刊: SCIENCE
影响因子: 56.9
作者:
BROWN, MS;GOLDSTEIN, JL
通讯作者: GOLDSTEIN, JL
DOI: 10.1083/jcb.3.3.457
发表时间: 1957-05-25
期刊: The Journal of biophysical and biochemical cytology
影响因子: --
作者:
MOORE DH;RUSKA H
通讯作者: RUSKA H
DOI: 10.1111/j.1549-8719.2012.00168.x
发表时间: 2012-05
期刊: Microcirculation (New York, N.Y. : 1994)
影响因子: --
作者:
Arkill KP;Neal CR;Mantell JM;Michel CC;Qvortrup K;Rostgaard J;Bates DO;Knupp C;Squire JM
通讯作者: Squire JM