2.4. Detection of O2− in the rat aorta by lucigenin chemiluminescence
Thirty minutes after ethanol administration the rat aorta was isolated and frozen in liquid nitrogen. The lucigenin-derived chemiluminescence assay was performed as described previously [8]. Luminescence was measured in a luminometer (Orion II Luminometer, Berthold detection systems, Pforzheim, Germany). Results are expressed as relative light unit (RLU)/μg protein. Protein concentrations in all experiments were determined using the method of Lowry (Bio-Rad Laboratories, Hercules, CA, USA).