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M9470137.TXT
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1994-07-02
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Document 0137
DOCN M9470137
TI Antioxidant status and lipid peroxidation in patients infected with HIV.
DT 9409
AU Favier A; Sappey C; Leclerc P; Faure P; Micoud M; GREPO: Groupe de
Recherches sur les Pathologies Oxydatives,; Faculte de Pharmacie,
Universite de Grenoble, La Tronche,; France.
SO Chem Biol Interact. 1994 Jun;91(2-3):165-80. Unique Identifier :
AIDSLINE MED/94251843
AB Deficiency in antioxidant micronutrients have been observed in patients
with AIDS. These observations concerning only some isolated nutrients
demonstrate a defect in zinc, selenium, and glutathione. An increase in
free radical production and lipid peroxidation has been also found in
these patients, and takes a great importance with recent papers
presenting an immunodeficiency and more important an increase in HIV-1
replication secondary to free radicals overproduction. We have assessed
different studies, trying to obtain a global view of the antioxidant
status of these patients. In adults we observe a progressive decrease
for zinc, selenium, and vitamin E with the severity of disease, except
that selenium remains normal at stage II. However, the main dramatic
decrease concerns carotenoids whose level at stage II is only half the
normal value. To understand if these decreases in antioxidant and
increases in oxidative stress occur secondary to the aggravation of the
disease or, conversely, are responsible for it, we undertook a
longitudinal survey of asymptotic patients. The preliminary results of
this evaluation are presented. Paradoxically, lipid peroxidation is
higher at stage II than at stage IV. This may be consecutive to a more
intense overproduction of oxygen free radicals by more viable
polymorphonuclear (PMN) at the asymptomatic stage. The free radicals
production and lipid peroxidation seem secondary to a direct induction
by the virus of PMN stimulation and cytokines secretion. N-Acetyl
cysteine or ascorbate have been demonstrated in cell culture to be
capable of blocking the expression of HIV-1 after oxidative stress and
N-acetyl cysteine inhibits in vitro TNF-induced apoptosis of infected
cells. In regard to all these experimental data, few serious and large
trials of antioxidants have been conducted in HIV-infected patients,
although some preliminary studies using zinc or selenium have been
performed. In our opinion it is now time to evaluate in humans the
beneficial effect of antioxidants. The more promising candidates for
presenting synergistic effects when associated with N-acetyl cysteine
seem to be beta-carotene, selenium and zinc.
DE Acquired Immunodeficiency Syndrome/DRUG THERAPY/*METABOLISM Adult
Analysis of Variance Antioxidants/*METABOLISM Female Free Radicals
Human HIV Infections/DRUG THERAPY/*METABOLISM *Lipid Peroxidation
Male JOURNAL ARTICLE REVIEW REVIEW, TUTORIAL
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).