BACKGROUND: We have previously shown that erythropoietin (Epo) exerts neuroprotective effects in the Rice-Vannucci model of neonatal hypoxic-ischemic brain injury. However, the mechanisms of Epo protection in this model are still unclear. OBJECTIVES: In the present study, we studied the effects of systemically administered Epo on lipid peroxidation levels and antioxidant enzyme (superoxide dismutase and glutathione peroxidase) activities following hypoxic-ischemic brain injury in neonatal rats. METHODS: Seven-day-old Wistar rat pups were subjected to left carotid artery occlusion followed by 2.5 h of hypoxic exposure. Brain lipid peroxidation levels and antioxidant enzyme activities were measured in the injured hemispheres 24 h after the hypoxic-ischemic insult. RESULTS: Hypoxic-ischemic injury significantly increased the thiobarbituric acid-reactive substance levels in the injured hemispheres as compared to the control group. In addition, glutathione peroxidase activity was significantly elevated in Epo-treated animals compared to saline-treated animals and the control group. CONCLUSIONS: These results suggest that Epo exerts neuroprotective effects against hypoxic-ischemic brain injury at least partially via the modulation of antioxidant enzyme activity.
BACKGROUND: We have previously shown that erythropoietin (Epo) exerts neuroprotective effects in the Rice-Vannucci model of neonatal hypoxic-ischemic brain injury. However, the mechanisms of Epo protection in this model are still unclear. OBJECTIVES: In the present study, we studied the effects of systemically administered Epo on lipid peroxidation levels and antioxidant enzyme (superoxide dismutase and glutathione peroxidase) activities following hypoxic-ischemic brain injury in neonatal rats. METHODS: Seven-day-old Wistar rat pups were subjected to left carotid artery occlusion followed by 2.5 h of hypoxic exposure. Brain lipid peroxidation levels and antioxidant enzyme activities were measured in the injured hemispheres 24 h after the hypoxic-ischemic insult. RESULTS:Hypoxic-ischemic injury significantly increased the thiobarbituric acid-reactive substance levels in the injured hemispheres as compared to the control group. In addition, glutathione peroxidase activity was significantly elevated in Epo-treated animals compared to saline-treated animals and the control group. CONCLUSIONS: These results suggest that Epo exerts neuroprotective effects against hypoxic-ischemic brain injury at least partially via the modulation of antioxidant enzyme activity.
Authors: R Ann Sheldon; Christine Windsor; Byong Sop Lee; Olatz Arteaga Cabeza; Donna M Ferriero Journal: Dev Neurosci Date: 2017-04-27 Impact factor: 2.984
Authors: Yvonne W Wu; Larry A Bauer; Roberta A Ballard; Donna M Ferriero; David V Glidden; Dennis E Mayock; Taeun Chang; David J Durand; Dongli Song; Sonia L Bonifacio; Fernando F Gonzalez; Hannah C Glass; Sandra E Juul Journal: Pediatrics Date: 2012-09-24 Impact factor: 7.124