Mn-SOD, GR, CAT, MDA and H2O2 levels levels in the rabbits with mild hydronephrosis perfused with fluid at pressures of 0 mmHg, 20 mmHg and 60 mmHg were also comparable, They were also comparable in rabbits with severe hydronephrosis perfused with fluid at pressures of 0 mmHg and 20 mmHg (p>0.05, Fig 2B). This evidence concerns the gene SOD2 and hydronephrosis.