Lenalidomide maintenance therapy does not enhance MM-specific CD4 + T-cell responses Analysis of T-cell responses specific for the MAGE-C1 peptide SQSSPVSSFPSSTSS. ( A ) CD137 expression on CD4 + and CD8 + T cells from patient#02 at the pre <t>LEN</t> timepoint upon in vitro restimulation with the MAGE-C1 peptide. ( B ) <t>PBMCs</t> obtained at the pre LEN and the LEN timepoint were examined by IFN-γ ELISPOT to measure the T-cell response to the MAGE-C1 peptide. The bar graphs show the mean number of spots per million cells of four replicate wells and the error bars represent the standard deviation. A two-way ANOVA with Sidak's multiple comparisons test was performed to evaluate statistical significant differences, ns: not significant, ** p ≤ 0.01, *** p ≤ 0.001 and **** p ≤ 0.0001.