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M94A0351.TXT
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1994-10-08
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Document 0351
DOCN M94A0351
TI Linear epitopes of HIV-1, presented as hybrids with Escherichia coli
beta-galactosidase or synthetic peptides.
DT 9412
AU Isaguliants MG; Sukhanova LL; Levi M; Bobkov AP; Kalinina TI; Ruden U;
Smirnov VD; Wahren B; D.I. Ivanovsky Institute of Virology, Academy of
Medical; Sciences, Moscow, Russia.
SO AIDS Res Hum Retroviruses. 1994 Jun;10(6):655-64. Unique Identifier :
AIDSLINE MED/94355110
AB HIV-1 B cell epitopes from gp41, the T cell epitope of p34pol, and a
cluster of B and T epitopes from p17gag were selected. The epitopes were
presented as synthetic peptides and as either N- or C-terminal
insertions into beta-galactosidase. Hybrids were efficiently expressed
in E. coli and easily purified when epitopes were inserted at the
beta-galactosidase C terminus. Sera from HIV-1-infected individuals
reacted in peptide- and hybrid protein-based enzyme-linked immunosorbent
assays (ELISAs) mostly with the immunodominant site of gp41. The second
site of gp41 and also sites from p17 and p34 appeared to be
immunorecessive. A few of the HIV-1-positive sera exhibited several
immunorecessive reactivities. HIV-1-positive sera from the former Soviet
Union and Cuba had reactivities similar to those of American, African,
and west European sera. Some sera could not be evaluated as specifically
HIV-1 seropositive because of their broad reactivities with a multitude
of peptides and proteins, unrelated to HIV-1. Extensive tests were
performed to define unspecific reactivities by absorption, blocking, and
sandwich ELISAs. The application of the hybrid protein assay
substantially improved the specificity of the ELISA tests. Thus, hybrid
protein-based ELISAs appeared to be more suitable than peptide-based
ELISAs, especially for the evaluation of immunorecessive reactivities.
DE beta-Galactosidase/*IMMUNOLOGY Amino Acid Sequence Antigenic
Determinants/*ANALYSIS Base Sequence Enzyme-Linked Immunosorbent Assay
Escherichia coli/ENZYMOLOGY/*GENETICS Human
HIV-1/ENZYMOLOGY/*IMMUNOLOGY Membrane Glycoproteins/*ANALYSIS
Molecular Sequence Data Oligonucleotides Protein Hybridization
Recombinant Proteins Support, Non-U.S. Gov't Vaccines,
Synthetic/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).