title: Maternal antibodies to HIV-1 envelope domains: No correlation with HIV-1 vertical transmission in patients from Argentina.
abstract: The role of the maternal antibody response in relation to vertical human immunodeficiency virus type 1 (HIV-1) transmission was investigated in HIV-1-infected mothers from Argentina. Sera from 23 transmitting and 18 nontransmitting HIV-1-infected mothers were tested for the presence of antibodies to V3 loop gp120 peptides representing both Argentinian sequences and several well-characterized viral isolates from different geographic areas. Argentinian sera from transmitting mothers had significantly higher capacity to react with four of 14 V3 loop peptides tested than sera from nontransmitting mothers. Frequency of reactivity against the other peptides did not differ between the two maternal groups. Furthermore, no differences in antibody affinity were found between transmitting and nontransmitting mothers. Sera were also tested against overlapping peptides covering a neutralizing epitope of the HIV-1 MN gp41 (amino acids 648-677). Statistical analysis indicated that no correlation between anti-gp41 antibodies and vertical transmission exists. Although we used V3 loop peptides based on local HIV-1 sequences, our data showed that maternal antibodies to these peptides, as well as to gp41 peptides, are not correlated with protection against HIV-1 vertical transmission.
authors.affiliation: Swedish Institute for Infectious Disease Control, Microbiology and Tumorbiology Center, Karolinska Institute, Stockholm, Sweden. Sandra.Amelia-Calarota@smi.ki.se
authors.forename: S A
authors.initials: SA
authors.lastname: Calarota
authors.forename: O V
authors.initials: OV
authors.lastname: Libonatti
mesh_terms: D000328:Adult; D000595:Amino Acid Sequence; D000918:Antibody Specificity; D001118:Argentina / Q000453:epidemiology; D005260:Female; D005315:Fetal Diseases / Q000209:etiology / Q000276:immunology; D015483:HIV Antibodies / Q000097:blood / Q000276:immunology*; D016655:HIV Core Protein p24 / Q000097:blood; D015699:HIV Envelope Protein gp120 / Q000737:chemistry / Q000276:immunology*; D015700:HIV Envelope Protein gp41 / Q000737:chemistry / Q000276:immunology*; D015658:HIV Infections / Q000151:congenital / Q000196:embryology / Q000453:epidemiology / Q000635:transmission*; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000737:chemistry / Q000276:immunology*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000276:immunology*; D019562:Viral Load; D014766:Viremia / Q000276:immunology
chemical_list: D015483:HIV Antibodies; D016655:HIV Core Protein p24; D015699:HIV Envelope Protein gp120; D015700:HIV Envelope Protein gp41; C059762:HIV envelope protein gp120 (305-321); D010446:Peptide Fragments