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1996-02-27
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Document 0510
DOCN M9630510
TI Antibody responses raised against a conformational V3 loop peptide of
HIV-1.
DT 9603
AU Bukawa H; Fukushima J; Hamajima K; Kimura M; Tsuji T; Xin KQ; Okuda K;
Department of Oral and Maxillofacial Surgery, Yokohama City; University
School of Medicine, Kanagawa, Japan.
SO Microbiol Immunol. 1995;39(8):607-14. Unique Identifier : AIDSLINE
MED/96064270
AB The amino acid sequence of the principal neutralizing determinant (PND)
of 224 cases of human immunodeficiency virus type 1 (HIV-1) was
determined and the most frequently occurring sequence was used as a
peptide antigen for studying virus-specific antibody responses. In our
present study, a linear peptide of the most frequent PND was first
synthesized and then oxidized to create a disulfide-bridged loop
conformation. Then, in order to construct a macromolecular structure for
the purpose of increasing antigenicity, the synthetic peptide was
conjugated to a core peptide. We compared the immunogenicity of the
disulfide-bridged loop PND peptide antigen (AG4) and the linear PND
peptide antigen (AG5). After immunizing rabbits 5 and 6 times with both
peptides, the results obtained using ELISA revealed that AG4
(conformational-loop type) was more capable of inducing a high titer of
antigen-specific antibodies than was AG5 (linear type). Despite an amino
acid sequence homology of 72%, a 1:8 dilution of serum raised against
AG4 inhibited 81.9% of HIV-1IIIB-mediated cell fusion, suggesting that
conformational V3 loop peptide is able to elicit an antibody response
which is strongly HIV-1-specific.
DE Amino Acid Sequence Animal Human HIV Antibodies/*BIOSYNTHESIS HIV
Envelope Protein gp120/CHEMISTRY/*IMMUNOLOGY HIV-1/*IMMUNOLOGY
Molecular Sequence Data Peptide Fragments/CHEMISTRY/*IMMUNOLOGY
Protein Conformation Rabbits Support, Non-U.S. Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).