mass and function. Insulin-like growth factor 1 (Igf1) has been implicated in islet
development and differentiated function 1, 2, but the factors controlling this process are
poorly understood. Pancreatic islets produce Igf1 and Igf2, which bind to specific receptors
on β-cells 3, 4, 5, 6. Igf1 has been shown to influence β-cell apoptosis 7, and both Igf1 and
Igf2 increase islet growth 8, 9; Igf2 does so in a manner additive with fibroblast growth factor …