Work

Glycosylphosphatidylinositol‐anchored high‐density lipoprotein‐binding protein 1 and the intravascular processing of triglyceride‐rich lipoproteins

Year: 2012

Type: review

Abstract: Lipoprotein lipase (LPL) is produced by parenchymal cells, mainly adipocytes and myocytes, but is involved in hydrolysing triglycerides in plasma lipoproteins at the capillary lumen. For decades, the mechanism by which LPL reaches its site of action in capillaries was unclear, but this mystery was recently solved. Glycosylphosphatidylinositol-anchored high-density lipoprotein-binding protein 1 (GPIHBP1), a glycosylphosphatidylinositol-anchored protein of capillary endothelial cells, 'picks up' LPL from the interstitial spaces and shuttles it across endothelial cells to the capillary lumen. When GPIHBP1 is absent, LPL is mislocalized to the interstitial spaces, leading to severe hypertriglyceridaemia. Some cases of hypertriglyceridaemia in humans are caused by GPIHBP1 mutations that interfere with the ability of GPIHBP1 to bind to LPL, and some are caused by LPL mutations that impair the ability of LPL to bind to GPIHBP1. Here, we review recent progress in understanding the role of GPIHBP1 in health and disease and discuss some of the remaining unresolved issues regarding the processing of triglyceride-rich lipoproteins.

Source: Journal of Internal Medicine

DOI: 10.1111/joim.12003

Authors: O. Adeyo, C. N. Goulbourne, A. Bensadoun, A. P. Beigneux, L. G. Fong, S. G. Young

Institutions: University of California, Los Angeles, Cornell University

Language: English

Topic: Lipid metabolism and disorders

Subfield: Cardiology and Cardiovascular Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: bronze

Funders: American Heart Association, National Institutes of Health, National Heart, Lung, and Blood Institute