Abstract:
:Synthetic peptides comprising the predicted principal neutralizing determinant (PND) in new African and North American HIV-1 clones were tested in ELISA for reactivity with ninety six serum samples from asymptomatic donors in six selected localities in Uganda. Irrespective of the geographical origin of the samples, the majority of the test sera cross-reacted at high intensities with the peptides derived from the North American clone, BRT3.6 (Group B), the Ugandan clone, CUG045, (Group C), and the Romanian clone, FRMA (Group F). The frequency of reactivity of the peptides from BRT3.6, CUG045, and FRMA were within the ranges of 57-100%, 50-100%, and 57-100%, respectively, for the sera collected from these disparate localities. In contrast to these findings, the V3 peptides derived from the other Ugandan isolates showed a more restricted pattern of reactivity with the same serum samples: AUG06c (1-63%), DUG23c (2%), and DUG044 (38-87%). The results from ELISA inhibition assay indicated that the V3 peptide from BRT 3.6, CUG045, and FRMA express closely related antigenic specificities quite distinct from those in AUG06c and DUG044. The residues comprising the PND in BRT 3.6, CUG045, and FRMA appear to be well conserved in the HIV-1 subtypes prevalent in the selected Ugandan locales. :In Uganda, health workers collected serum samples from 96 asymptomatic HIV-1 infected blood donors in Ishaka and Mbarara (southwest), Kisenyi and Kampala (central), and Lugazi and Jinja (east) so researchers working in a biochemistry laboratory at The City University of New York could describe the relative reactivity of the V3 loop from HIV-1 subtypes A, B, C, D, and F, as well as study the antigenic relationships within the PND encoded in the divergent HIV-1 subtypes. Regardless of geographic origin, the V3 peptides from most of the sera (at least 50%) collected in Uganda cross-reacted at high frequencies with the peptides derived from the novel North American clone (BRT3.6), the Ugandan clone (CUG045), and the Romanian clone (FRMA). The frequency of reactivity of these peptides with the test sera ranged from 57% to 100% for BRT3.6, from 50% to 100% for CUG045, and from 57% to 100% for FRMA. The V3 peptides from other Ugandan isolates (AUG06c, DUG044, and DUG23c) were less reactive with the same serum samples than BRT3.6, CUG045, and FRMA: 1-63%, 38-87%, and 2%, respectively. This finding suggests that the antigenic determinants expressed in AUG06c, DUG044, and DUG23c may not represent the PND encoded in most HIV-1 strains afflicting the Ugandan communities. The V3 peptides from BRT3.6, CUG045, and FRMA express closely related antigenic specificities altogether different from those in AUG06c and DUG044. The HIV-1 subtypes present in the selected Ugandan sites appear to effectively conserve the residues making up the PND in BRT3.6, CUG045, and FRMA.
journal_name
Arch Viroljournal_title
Archives of virologyauthors
Riley JP,Pestano GA,Hosford K,Francis C,Xie JM,Mugyenyi P,Kataaha P,Katongole-Mbidde E,Anokbonggo WW,Guyden Jdoi
10.1007/BF01322666keywords:
["Africa","Africa South Of The Sahara","Americas","Biology","Clinical Research","Developed Countries","Developing Countries","Diseases","Eastern Africa","Eastern Europe","English Speaking Africa","Europe","Genetics","Hiv","Hiv Infections","In Vitro","North America","Research Methodology","Research Report","Romania","Uganda","Viral Diseases"]subject
Has Abstract,Author List Incompletepub_date
1995-01-01 00:00:00pages
1393-404issue
8eissn
0304-8608issn
1432-8798journal_volume
140pub_type
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