The expression throughout adulthood of Prosβ5UAS.cNa under the control of Scer\GAL4da.Switch.PT, induced by mifepristone/RU486 in the diet, results in a significant increases in lifespan, food consumption and resistance to starvation, despite no effect on body weight or climbing ability, as compared to controls. There are no significant changes in survival to severe hyperoxia (>92% O[[2]]) or elevated temperature (37[o]C), as compared to controls.