Ascorbic acid can either increase or decrease low density lipoprotein modification.

Abstract:

:In freshly prepared low density lipoprotein (LDL), ascorbate inhibited LDL oxidation by macrophages at the higher concentrations tested (60-100 microM). In contrast, with LDL that had been allowed to autoxidise in the refrigerator (3 degrees C) for at least 10 weeks after isolation (mildly oxidised or minimally-modified LDL), ascorbate did not inhibit the modification of LDL in the presence of macrophages. Ascorbate actually modified autoxidised LDL itself in the absence of macrophages to greatly increase its uptake by macrophages. The modification of autoxidised LDL by ascorbate increased the levels of thiobarbituric acid-reactive substances in the medium and was completely inhibited by the antioxidant butylated hydroxytoluene. Thus the effects of ascorbate on unoxidized LDL can be very different to those on mildly oxidised LDL.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Stait SE,Leake DS

doi

10.1016/0014-5793(94)80469-9

subject

Has Abstract

pub_date

1994-03-21 00:00:00

pages

263-7

issue

2-3

eissn

0014-5793

issn

1873-3468

pii

0014-5793(94)80469-9

journal_volume

341

pub_type

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