Request for Research Proposals: Imbokodo HIV Vaccine Efficacy Trial
The HIV Vaccine Trials Network (HVTN), the NIH/NIAID Division of AIDS (DAIDS), and Janssen Vaccines and Prevention are pleased to welcome scientific study proposals involving specimens and/or study data from the Imbokodo (HVTN 705/VAC89220HPX2008) HIV vaccine clinical trial.
Ongoing research:
Immunological correlates research is ongoing in the Imbokodo study to investigate associations between HIV-1 infection risk, vaccine efficacy and both humoral and cellular immunity:
• Serum antibody binding to vaccine-matched antigens as well as to diverse panels of subtype C and cross-subtype HIV-1 antigens are being assessed through ELISA and a binding antibody multiplex assay (BAMA).
• Antibody functionality is being evaluated through antibody-dependent cellular cytotoxicity (ADCC) and phagocytosis (ADCP), and systems serology analyses are being done that cover a diverse array of antibody binding and functional responses.
• Functional T-cell responses are being investigated through IFN-ɣ ELISpot and intracellular cytokine staining (ICS) responses to vaccine-matched and potential T-cell Epitope (PTE) peptide pools, as well as T-cell breadth mapping via IFN-ɣ ELISpot.
• Viral sequencing of gag, pol and env genes is ongoing from all participants who acquired HIV-1 between months 7 and 24, to enable sieve analysis.
• Mucosal antibody responses will be assayed by multiplex binding assays.
• The impact of vaginal microbial composition on vaccine efficacy and the likelihood of acquiring HIV is being explored.
• Host genetic factors (including Fc receptor, IGHG variation and HLA genotype) are being assessed to investigate if these impact the vaccine efficacy.
Call for Proposals
We welcome proposals for research projects that will potentially extend, complement, or advance key hypotheses from the areas detailed above, or investigate other novel research questions beyond those listed to further the understanding of the outcomes in this clinical trial.
The submission period closes on April 4, 2023.
Learn more about this sample opportunity.
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