Table 2.

Effect of aqueous cigarette smoke extract (CSE) on Succinate dehydrogenase (complex II) activity (%) on both liver and skin mitochondria.

Succinate dehydrogenase (complex II) activity (%)		Groups
Skin	Liver
100±1	100±1.400±1.4	Control
82.08±6.3*	85±4.77*	+CSE (1%)
66.06±7.8**	74.9±0.90*	+CSE (10%)
44.45±1.9***	42.50±0.42***	+ CSE (100%)

Succinate dehydrogenase activity was measured using MTT dye as described in Materials and methods. Isolated mitochondria (0.5 mg/mL) were incubated for 1 h with various concentrations of CSE (0, 1, 10 and 100%). Values represented as mean}SD (n=3).

^* P<0.05;

^** P<0.01;

^*** P<0.001 compared with control mitochondria.