Next, we determined the expression levels of P2X sub-families P2RX1–7 and P2Y receptors P2RY1, P2RY2, P2RY4, P2RY5 (LPAR6), P2RY6, P2RY7 (LTB4R), P2RY8, P2RY9 (LPAR4), P2RY10–14 in normal lung tissues and lung cancer tissues. Here, P2RY8 is linked to lung cancer.