Ability of islets to secrete insulin after treatment with
proinflammatory cytokines. Isolated islets from the
NOD.scid, ALS/Lt, and ALR/Lt strains were
incubated for 15 h in 5.5 mmol glucose DMEM (open bars) or 5.5
mmol glucose DMEM containing 5 units/ml IL-1β, 100
units/ml TNFα, and 100 units/ml IFN-γ (hatched bars)
or 10 units/ml IL-1β, 500 units/ml TNFα, and 500
units/ml IFNγ (solid bars). Islets were washed free of the
cytokine incubation media and assayed for GSIS in 22 vs. 2.8 mmol
glucose DMEM. Data represent the mean difference between basal and
GSIS ± SEM. Results are calculated from two independent
experiments performed in triplicate.