Removal of triacylglycerols from chylomicrons and VLDL by capillary beds: the basis of lipoprotein remnant formation.

Conference item

The triacylglycerol content of chylomicrons and VLDL (very-low-density lipoprotein) compete for the same lipolytic pathway in the capillary beds. Although chylomicron triacylglycerols appear to be the favoured substrate for lipoprotein lipase, VLDL particles compete in numbers. Methods to quantify the specific triacylglycerol removal from VLDL and chylomicrons may involve endogenous labelling of the triacylglycerol substrate with stable isotopes in combination with arteriovenous blood sampling in humans. Arteriovenous quantification of remnant lipoproteins suggests that adipose tissue with its high lipoprotein lipase activity is a principal site for generation of remnant lipoproteins. Under circumstances of reduced efficiency in the removal of triacylglycerols from lipoproteins, there is accumulation of remnant lipoproteins, which are potentially atherogenic.

Authors: Karpe, F; Bickerton, A; Hodson, L; Fielding, B; Tan, G

• Publication status: Published
• Journal: Biochemical Society transactions
• Volume: 35
• Issue: Pt 3
• Pages: 472-476
• Publication date: 2007-06-01
• Event title: Conference on Diet and Cardiovascular Health - Chylomicron Remnants and Their Emerging Roles in Vascular Dysfunction in Atherogenesis
• DOI: 10.1042/bst0350472
• EISSN: 1470-8752
• ISSN: 0300-5127
• Keywords: Tissue Distribution; Chylomicrons; Muscle, Skeletal; Capillaries; Triglycerides; Humans; Chylomicron Remnants; Lipoprotein Lipase; Lipoproteins, VLDL; Adipose Tissue