GLP1R and pancreatic insulinoma: In this study, we employed comparative proteomic analyses of cellular protein profiles during thapsigargin-induced INS-1 rat insulinoma cell death in the absence and presence of exenatide, a GLP-1 receptor agonist, in INS-1 cell line, to identify the proteins involved in ER stress caused INS-1 cell death and its protection by exenatide.