Effects of maternal hHcy and NaHS treatment on H2S concentration and the level of oxidative stress in rat brain tissues. H2S concentration (a) and activity of CBS (b) of rat brain tissues from control (n = 21), Hcy (n = 21), NaHS (n = 21), and HcyNaHS (n = 21) groups. The level of malondialdehyde (MDA) an end product of lipoperoxidation (c) and activity of the antioxidant enzyme—glutathione peroxidase (GPx) (d) in brain tissues of rats control (n = 20, white columns); Hcy (n = 20, grey columns), NaHS (n = 19, dashed columns), HcyNaHS (n = 20, grey dashed columns) groups. * p < 0.05 compared to the control group, #
p < 0.05 compared to the Hcy group.