The growth inhibition capacity of several PYY fragments (e.g., PYY1-36, PYY14-36, PYY22-36) has been studied; PYY14-36 showed the highest antitumor potency against PANC-1 and Mia PaCa-2 pancreatic cancer cells as well as the highest specific binding to tumor cells [209]. This evidence concerns the gene PYY and neoplasm.