出版社：American Society for Biochemistry and Molecular Biology
摘要：The extent to which plasma HDL concentration regulates reverse cholesterol transport (RCT) is not known. The principal acceptors of unesterified cholesterol (UC) from cultured cells are small pre-β-HDL, which we have shown increase in plasma during intravenous infusion of apolipoprotein A-I/phosphatidylcholine (apoA-I/PC) discs in humans. We have now examined the effects on tissue fluid HDL and RCT. ApoA-I/PC or proapoA-I/PC discs were infused into 16 healthy males. Eleven had been given intravenous radiocholesterol to label tissue pools; in 12 prenodal leg lymph was collected throughout; and in 8 all feces were collected. The rise in small pre-β-HDL in plasma was associated with increases in 1 ) pre-β-HDL concentration in lymph (all subjects), 2 ) the size of other lymph HDL (four of four subjects), 3 ) the cholesterol content of lymph lipoproteins relative to plasma lipoproteins ( P 4 ) cholesterol-specific radioactivity in lymph (five of nine subjects), 5 ) plasma lathosterol ( P 6 ) plasma cholesterol esterification rate ( P 7 ) fecal bile acid excretion ( P —Nanjee, M. N., C. J. Cooke, R. Garvin, F. Semeria, G. Lewis, W. L. Olszewski, and N. E. Miller. Intravenous apoA-I/lecithin discs increase pre-β-HDL concentration in tissue fluid and stimulate reverse cholesterol transport in humans. J. Lipid Res. 2001. 42: 1586–1593.
