IL10 and lung cancer: To verify whether IL-10 was responsible for this apoptosis of T cells and lung cancer cells, the numbers of apoptotic T cells of PBMCs from the ATA haplotype healthy donors was increased by treatment with 100 ng/ml IL-10 (8.34±2.37 vs. 15.97±3.03, P<0.001 for A549; 12.97±2.94 vs. 15.70±3.54, P = 0.008 for TL-1; Fig. 4A).