home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Software Vault: The Diamond Collection
/
The Diamond Collection (Software Vault)(Digital Impact).ISO
/
cdr16
/
med9505a.zip
/
M9550191.TXT
< prev
next >
Wrap
Text File
|
1995-03-04
|
3KB
|
43 lines
Document 0191
DOCN M9550191
TI Toxicity of sulfonamide-reactive metabolites in HIV-infected,
HTLV-infected, and noninfected cells.
DT 9505
AU Rieder MJ; Krause R; Bird IA; Dekaban GA; J. P. Robarts Research
Institute, Department of Paediatrics,; Western Ontario, London, Canada.
SO J Acquir Immune Defic Syndr Hum Retrovirol. 1995 Feb 1;8(2):134-40.
Unique Identifier : AIDSLINE MED/95135991
AB It has been suggested that the high rates of adverse reactions to
sulfonamides among patients with AIDS may be related to an increased
sensitivity to reactive drug metabolites among HIV-infected cells. To
study this hypothesis, we investigated the toxicity of the hydroxylamine
of sulfamethoxazole in HIV-infected and noninfected MOLT-3 cultured
human T-lymphoblasts. Toxicity was assessed by trypan blue dye
exclusion. The hydroxylamine of sulfamethoxazole produced
concentration-dependent toxicity in HIV-infected cells, with marked
toxicity seen when HIV-infected cells were incubated with 400 microM of
the hydroxylamine (82 +/- 8%); this was significantly greater than the
toxicity seen among noninfected cells (p < 0.01). There was no
concentration-dependent toxicity seen among noninfected cells or in
cells infected with HTLV-I, suggesting that the concentration-dependent
toxicity seen was specifically related to HIV infection. HIV-infected
cells had significantly lower glutathione concentration than did
noninfected cells (p < 0.05). Incubation with the hydroxylamine of
sulfamethoxazole produced a concentration-dependent decline in
glutathione content that was similar in infected and non-infected cells.
Co-incubation with glutathione or N-acetylcysteine significantly reduced
the toxicity of hydroxylamine of sulfamethoxazole in HIV-infected cells
(p < 0.05). Our data supports the role of reactive sulfonamide
metabolites in the pathogenesis of adverse reactions to sulfonamides
among patients with AIDS.
DE Adult Cells, Cultured Comparative Study Dose-Response Relationship,
Drug Drug Hypersensitivity/ETIOLOGY Human HIV Infections/*DRUG
THERAPY HTLV-BLV Infections/*DRUG THERAPY Models, Biological
Sulfamethoxazole/*ANALOGS & DERIVATIVES/TOXICITY Support, Non-U.S.
Gov't T-Lymphocytes/*DRUG EFFECTS/VIROLOGY Toxicity Tests JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).