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  • Title: Interleukin-2 reconstitutes defective human immunodeficiency virus (HIV), and cytomegalovirus (CMV) specific CD8+ T cell proliferation in HIV infection.
    Author: Yu J, Chen H, Horton H, Bansal A, McElrath JM, Reichman R, Goepfert P, Jin X.
    Journal: J Med Virol; 2006 Sep; 78(9):1147-57. PubMed ID: 16847956.
    Abstract:
    Recent studies indicate that a defective proliferative response of HIV-specific CD8+ T cells is associated with the lack of virologic control in chronic HIV infection in humans. The possible mechanisms that might be responsible for the reduced proliferative potential of HIV-specific CD8+ T cells and conditions conducive to the proliferation of CD8+ T cells were examined in 14 HIV-infected individuals and 7 HIV-uninfected controls using CFSE labeling and flow cytometry techniques, and analyzed data using 2 quantitative measurements: the percentages of proliferating CD8+ T cells (Tp), and the maximum number of cell divisions (Dm) after stimulation. It was found that CD8+ T cells from HIV-infected and -uninfected subjects proliferated equally well after polyclonal stimulation by phylohemagglutinin A (PHA); both groups reached a Tp of 92%-96% and a Dm of 5-8. However, in HIV-infected subjects, proliferation of HIV- and CMV-specific CD8+ T cells was significantly reduced compared to proliferation of CMV- specific CD8+ T cells from HIV-uninfected subjects. These defective proliferative responses of HIV- and CMV-specific CD8+ T cells were restored by the addition of IL-2 at the time of stimulation. These results may have implications for the design of immune modulation strategies in vivo.
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