BEL (3 μg/g) or vehicle was injected into the tail vein of mice once a day for 5 d. A, Fasting glucose levels with either vehicle (open bar) or BEL (solid bar) were determined. Mean ± SEM is indicated. Data were compared with a two-tailed unpaired t test. B, The pancreatic sections were prepared and stained for insulin, glucagon, and iPLA2 (1:250 dilution of antibodies T-14). Slides were then counterstained with hematoxylin to identify cell nuclei (original magnification, ×100).