LEP and type 1 diabetes mellitus: The nine-day treatment of male Wistar rats with long-term moderate T1DM induced by 35 mg/kg streptozotocin and seven-day treatment of animals with short-term severe T1DM induced by 50 mg/kg streptozotocin with a mixture of INI (20 μg/rat) and ICP (36 μg/rat) attenuated hyperglycemia and restored reduced leptin levels.