IGF1R and diabetes mellitus: The insulin and IGF1 signals triggered through the insulin receptors (IRs) and IGF1 receptor (IGF1R), respectively, result in activation of the phosphotidylinositol 3-kinase/Akt signaling pathway and protein kinase C. The IGF-1 and insulin signaling pathways are now known to play important roles in tumor cell growth that is correlated with diabetes risk and cancer[19].