Figure 1. MMP-2-specific CD4+ T cell responses in melanoma patients.
TILs from representative melanoma patient M186 (A) or from 31 unselected patients (B) were stimulated with the MMP-2 peptide pool (2μM) for 6h and assessed for cytokine production by intracellular staining. Percentage of secreting cells upon peptide stimulation was considered specific/positive when it exceeded by more than twofold the background (cytokine-secreting cells in the absence of stimulation) and had more than 0.5% of responding cells (after background subtraction) for at least one cytokine. See also Fig.S1 for MMP-2-derived peptides and patient survival analysis.