Original ArticleEffect of Erythropoietin and Stem Cells on Traumatic Brain Injury

ObjectiveTo investigate the healing effects of erythropoietin (EPO) and stem cells (SCs) in traumatic brain injury (TBI).MethodsTwenty-nine Wistar albino rats were used and separated into the following groups: control (C), EPO, SC, and SC+EPO. Group C received a TBI only, with no treatment. In the EPO group, 1000 U/kg EPO was given intraperitoneally at 30 minutes after TBI. In SC group, immediately after formation of TBI, 3 × 10,000 CD34+ stem cells were injected into the affected area. In the SC+EPO group, half an hour after TBI and the injection of stem cells, 1000 U/kg EPO was injected. Before and after injury, trauma coordination performance was measured by the rotarod and inclined plane tests.ResultsSeven weeks after trauma, rat brains were examined by radiology and histology. Rotarod performance test did not change remarkably, even after the injury. Compared with group C, the SC+EPO group was found to have significant differences in the inclined plane test results.ConclusionsSeparately given, SCs and EPO have a positive effect on TBI, and our findings suggest that their coadministration is even more powerful.