Table 2.

IFN-γ stimulation results in an increase in CD80 expression in HNSCC. Twenty-four-hour stimulation of regressor and progressor cell lines with IFN-γ (1,000–2,000 U/ml) results in up-regulation of CD80⁺ expressing cells. Results are average of two independent experiments

Cell lines	CD80 expression (%)
	Constitutive	Average increase by IFN-γ	p probability
B7E3-4scid	2–6	34	p<0.0001
B4B8-4scid	6–7	16	p=0.535
B7E11-4scid	80	1.5	p=0.107
B6C3-4scid	80–95	23	p<0.001
B6D8-4scid	60–80	34	p=0.080