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M9550121.TXT
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1995-03-04
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Document 0121
DOCN M9550121
TI Promiscuous and specific binding of HIV peptides to HLA-DR1 and DR103.
Impact on T-cell repertoire of nonimmunized individuals.
DT 9505
AU Praud C; Jurcevic S; L'Faqihi FE; Guiraud M; de Preval C; Thomsen M;
INSERM U395, Toulouse, France.
SO Hum Immunol. 1994 Sep;41(1):56-60. Unique Identifier : AIDSLINE
MED/95137782
AB The binding of immunogenic peptides to DR molecules is influenced by
residues that point into the peptide-binding groove. The T-cell response
toward a peptide complexed to an MHC molecule depends on the presence of
a sufficient number of T cells reactive with peptide-MHC complex on the
surface of APCs. From 96 overlapping HIV peptides, we have selected 11
that show a significant binding to either DR1, DR103, or both. These two
DR molecules are identical except for three amino acids at positions 67,
70, and 71 on the beta chain. Peptide-specific T-cell lines and clones
were generated with cells from nonimmunized donors homozygous for DR1 or
DR103 by using either individual peptides or peptide pools for the in
vitro priming. Three of the peptides induced T-cell-specific
proliferative response in both individuals, and these peptides were not
among those with highest affinity. Most of the peptides induced strong
responses against autologous APCs. This might reflect cross-reactivity
between HIV and self-peptides. Definition of peptides that both show
promiscuous binding to DR and elicit a strong T-cell response is
important for design of efficient synthetic vaccines.
DE AIDS Vaccines/IMMUNOLOGY Cell Line Human HIV Antigens/*IMMUNOLOGY
HIV Envelope Protein gp120/METABOLISM HLA-DR Antigens/*METABOLISM
HLA-DR1 Antigen/METABOLISM Lymphocyte Transformation/IMMUNOLOGY
Support, Non-U.S. Gov't T-Lymphocytes/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).