Fig. 1.
Up-regulation of CD4+ T-cell surface CXCR4 and CCR5 after intravenous injection of LPS (4 ng/kg) into 8 subjects.
Data expressed as mean (SE) difference between specific and nonspecific mean cell fluorescence (MCF) and as fraction of positive CD4+ T cells. Lower panels are histograms showing the mean channel fluorescence of CD4+ T cells positive for CXCR4 or CCR5 in a representative volunteer before and 6 hours after receiving LPS.