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M9480521.TXT
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1994-08-20
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Document 0521
DOCN M9480521
TI Binding of human immunodeficiency virus type 1 to the C3b/C4b receptor
CR1 (CD35) and red blood cells in the presence of envelope-specific
antibodies and complement. National Institutes of Health AIDS Vaccine
Clinical Trials Networks.
DT 9410
AU Montefiori DC; Graham BS; Zhou JY; Zhou JT; Ahearn JM; Dept. of Surgery,
Duke University Medical Center, Durham, NC; 27710.
SO J Infect Dis. 1994 Aug;170(2):429-32. Unique Identifier : AIDSLINE
MED/94308613
AB Immune complexes formed in vitro by incubating cell-free human
immunodeficiency virus type 1 (HIV-1) with sera from infected or
gp160-vaccinated persons, together with normal human serum as a source
of complement, readily bound to K562 cells expressing recombinant human
complement receptor type 1 (CR1). However, antibodies from seronegative
persons had little or no effect. This effect was absent in the presence
of heat-inactivated or C3-depleted normal human sera or when wild type
K562 cells were used, confirming a requirement for complement and CR1.
In additional experiments, complement alone targeted HIV-1 to CR1 on red
blood cells, and envelope-specific antibodies increased this effect.
These results demonstrate that envelope-specific antibodies promote
HIV-1 immune complex formation with complement and that these complexes
readily bind CR1 on cell surfaces.
DE Antigen-Antibody Complex/METABOLISM Complement/*IMMUNOLOGY Complement
Activation Erythrocytes/*METABOLISM Gene Products, env/IMMUNOLOGY
Human HIV Antibodies/*IMMUNOLOGY HIV-1/IMMUNOLOGY/*METABOLISM Immune
Sera/IMMUNOLOGY Protein Precursors/IMMUNOLOGY Receptors, Complement
3b/*METABOLISM Support, U.S. Gov't, P.H.S. JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).