CD8A and neoplasm: Although the NK1.1+ cells remained critical for the tumour growth inhibition, the depletion of CD8+ cells also resulted in acceleration of the tumour growth in 5AC- and CpG ODN-treated animals, while the growth of the TC-1/A9 tumours in CpG ODN 1826 only-treated animals was not affected by the CD8+ cell depletion.