Representative patterns of cytokine and chemokine mRNA expression in Mig-, IP-10–, or buffer-treated Burkitt's tumors shown by semiquantitative RT-PCR analysis. Total cellular RNA was extracted from Burkitt (CA46 cell line) tumors established in athymic mice and subsequently treated with intratumor inoculations of either human rMig (400 ng/d), human rIP-10 (400 ng/d), or diluent (0.2 mL/d), as described in the legend to Table 1.