Group	Dose	TBARS (mM/100 g wet liver tissue)	GSH (mg/100 g wet liver tissue)	CAT (μmol H 2 O 2 consumed/min/mg wet liver tissue)
I (Normal control)	5 mL/kg	1.16±0.4	43.32±1.5	82.18±3.5
II (STZ)	60 mg/kg	2.05±0.3*	24.16±1.4*	45.38±4.1*
III (STZ+MECI)	250 mg/kg	1.32±0.41†	35.21±1.2†	68.39±5.6†
IV (STZ+MECI)	500 mg/kg	1.18±0.52†	40.12±1.1†	78.42±3.8†
V (STZ+Gliben)	0.5 mg/kg	1.17±0.41†	41.08±1.2†	80.49±4.8†

Values are expressed as mean ± standard error of the mean (n=6).

*P<0.001 compared with normal control.

†P<0.001 compared with STZ control group.

CAT=catalase; Gliben=glibenclamide; GSH=reduced glutathione; TBARS=thiobarbituric acid reactive substances; STZ=streptozotocin.