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1996-02-26
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Document 0405
DOCN M9620405
TI Functional characterization of human immunodeficiency virus type 1 nef
genes in patients with divergent rates of disease progression.
DT 9602
AU Michael NL; Chang G; d'Arcy LA; Tseng CJ; Birx DL; Sheppard HW; Division
of Retrovirology, Walter Reed Army Institute of; Research, Rockville,
Maryland 20850, USA.
SO J Virol. 1995 Nov;69(11):6758-69. Unique Identifier : AIDSLINE
MED/96013770
AB We have studied the sequence and function of the human immunodeficiency
virus type 1 (HIV-1) nef genes from nine patients with highly divergent
rates of disease progression enrolled in a longitudinal study of HIV
disease. Over an average of 7.8 years of follow-up, three patients had
net positive changes in CD4+ T-cell counts, three patients had net
negative changes in CD4+ T cells but did not develop AIDS, and three
patients progressed to AIDS. The nef gene from each of these patients
was amplified and cloned, and the sequence of 8 to 10 clones was
determined. Only 2 of 88 (2.3%) nef genes recovered from these nine
patients were grossly defective. Moreover, there was no relationship
between the phylogeny of nef sequences and the corresponding rates of
disease progression from these patients. Representative nef genes from
all nine patients were tested for their abilities to downregulate cell
surface CD4 in a transient-transfection assay. There was no correlation
found between the functions of the nef genes from these patients and
their corresponding rates of disease progression. We conclude that the
nef gene is not a common mediator of the rate of HIV disease progression
in natural infection.
DE Acquired Immunodeficiency Syndrome/IMMUNOLOGY/VIROLOGY Adult Amino
Acid Sequence Base Sequence Comparative Study CD4 Lymphocyte Count
Disease Progression DNA Primers Follow-Up Studies *Genes, nef Human
HIV Infections/*IMMUNOLOGY/*VIROLOGY HIV
Seropositivity/*IMMUNOLOGY/*VIROLOGY HIV-1/*GENETICS Male Middle Age
Molecular Sequence Data Phylogeny Polymerase Chain Reaction Support,
U.S. Gov't, P.H.S. Time Factors Transfection Variation (Genetics)
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).