low-density lymphocytes prepared by percoll fractionation of human peripheral blood mononuclear leucocytes were found to produce large amounts of interferon-gamma ( ifn-gamma ) in response to different t-cell mitogens in the absence of macrophages , whilst higher density lymphocytes were strongly dependent on the presence of macrophages for significant ifn-gamma production .
C0086418
human
C0021756
t-cell mitogens