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1996-03-09
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Document 0219
DOCN M9650219
TI Differential maturation of avidity of IgG antibodies to gp41, p24 and
p17 following infection with HIV-1.
DT 9605
AU Thomas HI; Wilson S; O'Toole CM; Lister CM; Saeed AM; Watkins RP;
Morgan-Capner P; Department of Virology, Royal Preston Hospital, UK.
SO Clin Exp Immunol. 1996 Feb;103(2):185-91. Unique Identifier : AIDSLINE
MED/96152663
AB We have evaluated solid-phase ELISA IgG antibody avidity studies as a
means of identifying cases of recent HIV-1 infection. Although separate
studies on the avidity of anti-gp41 and anti-p24 antibodies in
seroconvertors have been reported, a comparison of the ability of
patients to simultaneously mature their immune response to more than one
HIV antigen immediately following seroconversion appears to be lacking.
We have demonstrated a maturation in anti-gp41 avidity which reflects
the time since seroconversion in all cases. In contrast, however, only
some patients produced high-avidity anti-p24 or anti-p17 antibodies
during the same time span. While the avidity of anti-gp41 antibodies
remained high in cases of non-recent HIV infection, even in the face of
advanced disease, we have confirmed the findings of others that the
avidity of anti-p24 falls before the onset of ARC or AIDS. Therefore,
whilst the avidity of anti-gp41 antibodies could reliably be of value in
identifying cases of recent HIV infection, the avidity of anti-p24 or
anti-p17 antibodies could not, but may be of prognostic value, even at
an early stage. The time taken to reach maximum anti-p17, anti-p24 and
anti-gp41 titres was variable, but anti-gp41 titres, like anti-gp41
avidity, remained high. In contrast, anti-p24 titres fell, even during
the early followup period in some seroconvertors. Anti-p24 antibody
avidity, however, appeared to be a better predictor of disease
progression in 'remote' cases than anti-p24 titre. The avidity and
titres of these antibodies are presented in relation to the clinical
details, p24 antigen status, CD4 and CD8 counts where these are known.
DE Adult Antibody Affinity Gene Products, gag/*IMMUNOLOGY Human HIV
Antibodies/*BLOOD HIV Antigens/*IMMUNOLOGY HIV Core Protein
p24/*IMMUNOLOGY HIV Envelope Protein gp41/*IMMUNOLOGY HIV
Infections/BLOOD/*IMMUNOLOGY HIV Seropositivity/IMMUNOLOGY
HIV-1/*IMMUNOLOGY IgG/*BLOOD Middle Age Support, Non-U.S. Gov't Time
Factors JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).