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.
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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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