A new capture test using conjugated peptides for the detection of HIV antibodies.

Important note: Information in this article was accurate in 1992. The state of the art may have changed since the publication date.

A new capture test using conjugated peptides for the detection of HIV antibodies.

FEMS Microbiol Immunol. 1991 Dec;4(1):57-64. Unique Identifier : AIDSLINE MED/92273235
Richalet-Secordel PM; Van Regenmortel MH; Laboratoire d'Immunochimie, Institut de Biologie Moleculaire et; Cellulaire, Strasbourg, France.

Abstract: A new capture test utilizing conjugated peptides has been developed for the detection of antibodies elicited against HIV-1. Human sera diluted 1:1000 were incubated in ELISA plates precoated with protein G. The captured IgG were allowed to react with three synthetic peptides corresponding to the gp41 sequence (591-611) YLKDQQLLGIWGCSGKLICTT, the gp120 sequence (314-329) IRIQRGPGRAFVTIGK and the p27 sequence (182-198) EWRFDSRLAFHHVAREL. The peptides were used in the form of N-hydroxysuccinimido-biotin ovalbumin conjugates. Peroxidase-labelled streptavidin was used to detect antigen-antibody complexes. The sensitivity and specificity of detection of antibodies were analyzed with 40 HIV positive sera, 10 seroconverting sera and 21 normal human sera (NHS). The results were compared with a commercial indirect ELISA in which a single conjugated gp41 peptide was used as antigenic probe. This indirect ELISA recognized 100% of the HIV positive and the seroconverting sera. The new capture test using the gp41 conjugated peptide also recognized 100% of the HIV positive sera but was more specific since it gave no false positive results whereas the indirect test did. The gp120 and p27 conjugated peptides detected 35/40 (87.5%) and 31/40 (77.5%) of HIV positive sera respectively and also detected 9/10 (90%) and 10/10 (100%) of the seroconverting sera respectively, without any false positive results (0/21). The proposed new capture test is a very sensitive and specific assay for detecting HIV antibodies.

Keywords: Amino Acid Sequence Human HIV Antibodies/*ANALYSIS HIV Antigens/*CHEMISTRY/*IMMUNOLOGY HIV Envelope Protein gp120/CHEMISTRY/IMMUNOLOGY HIV Envelope Protein gp41/CHEMISTRY/*IMMUNOLOGY HIV Seropositivity/*DIAGNOSIS Immunosorbent Techniques Molecular Sequence Data Peptides/CHEMISTRY Support, Non-U.S. Gov't JOURNAL ARTICLE
920930
M9290895

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