Abstract:
:Lipid-lowering agents are used with the purpose of ameliorating hyperlipoproteinemias, in order to prevent arterial disease. Lipid-lowering drugs can be classified into absorbable agents and into nonabsorbable compounds, acting within the gastrointestinal lumen. Absorbable drugs (fibric acids, nicotinic acid, probucol, HMG-CoA reductase inhibitors) reduce plasma very-low-density lipoproteins (VLDL) and/or low-density lipoproteins (LDL) by a variety of mechanisms. Fibric acids, in particular, act by stimulating the catabolism of VLDL and also, as a consequence, improving LDL delipidation, thus favoring receptor uptake. Nicotinic acid and acipimox interfere with the biosynthesis of LDL and can also improve the clearance of VLDL/LDL. Probucol acts by a newly described mechanism, i.e. accelerating reverse transport of cholesteryl esters from high-density lipoproteins to lower-density lipoproteins. Finally, HMG-CoA reductase inhibitors, interfering with the biosynthesis of cholesterol, can induce an increased expression of liver high-affinity lipoprotein receptors. Nonabsorbable agents (anion-exchange resins, neomycin, beta-sitosterol) interrupt the recirculation of bile acids and/or reduce the absorption of cholesterol with the gut. They display a selective activity on hypercholesterolemia, again by increasing LDL receptor expression. The choice of one or more lipid-lowering agents will depend upon the patient's phenotype, determining responsiveness to the pharmacological treatment.
journal_name
Cardiologyjournal_title
Cardiologyauthors
Sirtori CR,Manzoni C,Lovati MRdoi
10.1159/000174789subject
Has Abstractpub_date
1991-01-01 00:00:00pages
226-35issue
3eissn
0008-6312issn
1421-9751journal_volume
78pub_type
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