EPO stimulated expression of antioxidant proteins in cerebral microvessels of hph1 mice. Representative Western blots and densitometric analysis indicated that treatment with EPO significantly increased expression of antioxidant protein MnSOD (A, * P<0.05, n=5) in cerebral microvessels of hph1 mice, while expression of CuZnSOD remained unchanged (B). Treatment with EPO also increased expression of catalase in cerebral microvessels of hph1 mice (C), while expression of GPx1 remained unchanged (* P<0.05, n=5).