A major problem in the development of a vaccine against HIV is, that immunological correlates of protection remain still unknown. To identify such correlates, T-cell immune responses of HIV-1 infected patients with different control of viral replication were analyzed by polychromatic flowcytometry. A characteristic feature of nonprogressors, in comparison to progressors and patients under antiretroviral treatment, was the presence of HIV-1-nef-specific CD45RA+ CD8+ T cells secreting MIP-1β, but not IFN-γ.
Furthermore, the T-cell response of an HIV-1 infected patient was investigated, who maintained stable viremia for three years, before control of viral replication was lost. Functional loss of HIV-1 specific CD4+ and CD8+ T cells, as well as a decrease of terminally differentiated CD8+ T cells correlated with loss of viral control. This study identifies possible correlates of protection and contributes to understand the mechanisms involved in the failure of the host immune system.
«A major problem in the development of a vaccine against HIV is, that immunological correlates of protection remain still unknown. To identify such correlates, T-cell immune responses of HIV-1 infected patients with different control of viral replication were analyzed by polychromatic flowcytometry. A characteristic feature of nonprogressors, in comparison to progressors and patients under antiretroviral treatment, was the presence of HIV-1-nef-specific CD45RA+ CD8+ T cells secreting MIP-1β, but...
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