Abstract
A monoclonal antibody (mAb) directed against a synthetic peptide derived from the sequence of the human immunodeficiency virus type 1 (HIV-1) regulatory protein virion infectivity factor (vif) labeled the surface of Schistosoma mansoni schistosomula by indirect immunofluorescence. Western blotting showed that two S. mansoni proteins of 170 and 65 kD were recognized by the mAb. Sera from 20% of S. mansoni-infected HIV-seronegative individuals tested recognized the PS4 peptide in an ELISA as did sera from S. mansoni-infected rats. Sera from individuals seropositive for HIV-1, but without schistosomiasis, that reacted with the vif peptide also recognized a 170-kD S. mansoni protein. This crossreactive S. mansoni antigen appears to be a target of immunity in vivo since passive transfer of the mAb VIF-CD3 to naive rats had a protective effect against a challenge infection with S. mansoni cercariae.
MeSH Terms
Amino Acid Sequence
Animals
Antibodies, Monoclonal
Antigens, Helminth/immunology
Antigens, Surface/immunology
Child
Cross Reactions
Enzyme-Linked Immunosorbent Assay
Epitopes/analysis
Fluorescent Antibody Technique
Gene Products, vif
HIV Seropositivity
HIV-1/immunology
Humans
Molecular Sequence Data
Peptides/chemical synthesis
Rats
Rats, Inbred Strains
Schistosoma mansoni/immunology
Schistosomiasis mansoni/immunology
Viral Regulatory and Accessory Proteins/immunology
Virion/immunology
vif Gene Products, Human Immunodeficiency Virus
Chemicals
Antibodies, Monoclonal
Antigens, Helminth
Antigens, Surface
Epitopes
Gene Products, vif
Peptides
Viral Regulatory and Accessory Proteins
vif Gene Products, Human Immunodeficiency Virus
Authors & Affiliations
9 authors, click to expand affiliations / ORCID
Khalife J
Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM, U167-CNRS 624, Strasbourg, France.
Grzych J M
Pierce R
Ameisen J C
Schacht A M
Gras-Masse H
Tartar A
Lecocq J P
Capron A
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