Effects of doxazosin, an alpha 1-adrenergic inhibitor, on plasma lipid and lipoprotein levels, low density lipoprotein metabolism and cholesterol absorption in cynomolgus monkeys.

Abstract:

:The mechanism(s) by which doxazosin, an alpha 1 inhibitor, regulates plasma low density lipoprotein cholesterol (LDL-C) and apolipoprotein B (apo B) levels were investigated in 'normocholesterolemic' (average total cholesterol (TC) of 218 mg/dl) and 'hypercholesterolemic' (average TC of 350 mg/dl) cynomolgus monkeys. Twelve weeks of doxazosin treatment (1 mg/kg per day) significantly reduced plasma TC and LDL-C levels in both groups while high density lipoprotein cholesterol and apolipoprotein A-I concentrations rose. Despite these changes in plasma lipids, LDL and HDL lipid composition was not affected by doxazosin. The reduction in LDL-C and apo B in the doxazosin-treated 'hypercholesterolemic' group was associated with a significant increase in both receptor-dependent and -independent LDL apo B fractional catabolic rates. Similar associations were noted in the 'normocholesterolemic' group. LDL apo B production or transport rate was not affected by doxazosin. Cholesterol absorption was also significantly reduced by doxazosin which may also contribute to lowering plasma LDL-C levels. These studies suggest that doxazosin treatment can produce beneficial changes in the plasma lipid profile over a wide rage of plasma cholesterol levels by up-regulating LDL fractional clearance.

journal_name

Atherosclerosis

journal_title

Atherosclerosis

authors

Stucchi AF,Vespa DB,Terpstra AH,Nicolosi RJ

doi

10.1016/0021-9150(93)90268-y

subject

Has Abstract

pub_date

1993-11-01 00:00:00

pages

255-66

issue

2

eissn

0021-9150

issn

1879-1484

pii

0021-9150(93)90268-Y

journal_volume

103

pub_type

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