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M94A3240.TXT
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1994-10-25
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Document 3240
DOCN M94A3240
TI Multiple input of infectious HIV-1 is essential to single cell killing.
DT 9412
AU Kuroda MJ; el-Farrash MA; Kannagi M; Harada S; Kumamoto University
School of Medicine, Japan.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):121 (abstract no. PA0104). Unique
Identifier : AIDSLINE ICA10/94369335
AB OBJECTIVE: To study the mechanism of single cell killing by HIV-1 in
CD4+ T cell line. METHODS: MT-4 cells were infected with different moi
(1, 10 and 30) of HIV-1 in the presence or absence of neutralizing
monoclonal antibody 0.5 beta or dextran sulfate added soon after
adsorption. Cell growth and viability of the infected cells were
assessed spectrophotometrically by in situ reduction of 3-(4,5
dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT).
Unintegrated and integrated DNA were analysed by Southern blott.
RESULTS: Efficient blocking of HIV-1-induced single cell killing and
establishment of persistently infected MT-4 cells were obtained in the
presence of 0.5 beta or dextran sulfate when infected with moi 1 but not
with higher moi of 10 to 30. The amount of unintegrated DNA, integrated
proviral DNA and protein syntesis were parallel to viral input dose.
CONCLUSION: Multiple internalization of virus particles is the first
step for HIV-1-induced single cell killing. Not only the accumulation of
unintegrated DNA but also integrated proviral DNA and viral protein
synthesis are accompanied with the cytocidal dose of virus. The high
amount of CD4 molecule on cell membrane may be requisite for cell
killing.
DE Cell Division Cell Line Cell Survival Cells, Cultured Human
HIV-1/GENETICS/*PHYSIOLOGY T4 Lymphocytes/CYTOLOGY/*MICROBIOLOGY Viral
Proteins/BIOSYNTHESIS Virus Integration MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).