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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Neopterin production by HIV-1-infected mononuclear phagocytes.

Neopterin is a pteridine produced by human mononuclear phagocytes, usually in response to interferon-gamma (IFN-gamma) stimulation. Increasing serum levels of neopterin correlate with clinical progression to AIDS in HIV-infected people, but the factors that contribute to these elevated levels are not established. We performed in vitro experiments to investigate the possibility that HIV-1 infection of mononuclear phagocytes directly induces enhanced neopterin production. We found that HIV-1-infected monocytes and peritoneal macrophages produced neopterin in quantities similar to amounts produced by uninfected cells. The HIV-infected cells responded to stimulation with IFN-gamma as well as uninfected cells, with a 6- to 12-fold increase in neopterin production. We conclude that elevated serum levels of neopterin in HIV-infected individuals are not caused by HIV-1 infection of mononuclear phagocytes but may be a result of the normal response to mononuclear phagocytes to increased levels of IFN-gamma.[1]


  1. Neopterin production by HIV-1-infected mononuclear phagocytes. Dukes, C.S., Matthews, T.J., Rivadeneira, E.D., Weinberg, J.B. J. Leukoc. Biol. (1994) [Pubmed]
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