IFNα stimulates TAP1 expression in mouse blood and tumor tissue and suppresses subcutaneous melanoma metastasis in a murine model for malignant melanoma.

C57BL/6 mice were inoculated subcutaneously with B16F1 malignant melanoma cells (day 0). The mice received either no treatment (control group, n = 3) or recombinant murine IFNα (n = 3). IFNα treatment (10.000 IU) started on day +3 after application of B16F1 cells for 5 consecutive days. (A) Measurement of tumor growth in control mice and IFNα treated mice. (B) On day +7.5, three IFNα treated and three control mice were sacrificed and blood was collected for qRT-PCR analysis of TAP1 expression. (C) Three days after the last injection of IFNα (day +11), three mice of the IFNα treated and three mice of the control group were sacrificed and tumors were excised for qRT-PCR analysis of TAP1 expression. Statistical analysis was performed using unpaired Student’s t-test (* p<0.05; not significant (n.s.)).