Hypoxic preconditioning modifies activity of pro- and antioxidant systems in the rat hippocampus

The effects of repetitive mild hypobaric hypoxic preconditioning on pro- and antioxidant systems in rat hippocampus have been studied. It was found that three-trial preconditioning by mild hypobaric hypoxia (360 mm Hg, 2 h) induced moderate oxidative stress immediately after the last preconditioning trial. In addition, it down regulated the levels of protein antioxidants (Trx-1, Trx-2, Cu,Zn-SOD) and also decreased several lipid peroxidation products 24 h after the preconditioning.