FPR1 and cancer: ATP and ANXA1 ligate purinergic receptors of the purinergic receptor P2X 7 (P2RX7) type and formyl peptide receptor 1 (FPR1), respectively, thus facilitating the chemoattraction and homing of migratory cDC1s into the tumor bed, into the proximity of stressed and dying cancer cells [13–15].