Diminution of Secondary Injury after Administration of Pharmacologic Agents in Acute Spinal Cord Injury Rat Model: Comparison of Statins, Erythropoietin and Polyethylene Glycol.
10.4184/jkss.2012.19.3.77
- Author:
Jae Won YOU
1
;
Hong Moon SOHN
;
Sang Ha PARK
Author Information
1. Department of Orthopaedic Surgery, School of Medicine, Chosun University, Gwangju, Korea. hmsohn@chosun.ac.kr
- Publication Type:Comparative Study ; Original Article
- Keywords:
Acute spinal cord injury;
Statins;
Erythropoietin;
Polyethylene glycol;
Rat
- MeSH:
Animals;
Erythropoietin;
European Continental Ancestry Group;
Humans;
Neuroprotective Agents;
Ohio;
Polyethylene;
Polyethylene Glycols;
Rats;
Simvastatin;
Spinal Cord;
Spinal Cord Injuries
- From:Journal of Korean Society of Spine Surgery
2012;19(3):77-84
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
STUDY DESIGN: An experimental animal study. OBJECTIVES: To evaluate and compare the neuroprotective effect of statins, erythropoietin and polyethylene glycol (PEG) after spinal cord injury (SCI). SUMMARY OF LITERATURE REVIEW: There are few comparative studies of pharmacological agents for acute SCI. MATERIALS AND METHODS: Forty Sprague Dawley (SD) rats had a spinal cord injury at T9/10 using an Ohio State University (OSU) impactor. The animals were randomized to receive one of the following; simvastatin, erythropoietin, PEG or saline. A behavioral outcome assessment was performed on days 2, 4 and 7, and then every week using the Basso, Bresnahan, and Beattie (BBB) score and subscore. The animals were sacrificed at the end of 6 weeks and histologic assessment was performed to measure the areas of white and gray matter. RESULTS: For the animals treated with simvastatin, erythropoietin, PEG and saline, the mean BBB scores at 6 weeks post-injury were 13.2+/-0.1, 11.7+/-0.4, 13.3+/-0.3, and 11.4+/-0.2, and the BBB subscores were 9.2+/-1.1, 5.0+/-1.3, 9.1+/-1.1, 4.4+/-1.2, respectively. The BBB scores and BBB subscores were significantly higher in simvastain and PEG-treated animals (p<0.05). The areas of white matter at the lesion epicenter were 0.78+/-0.05mm2, 0.46+/-0.04 mm2, 0.68+/-0.15 mm2, and 0.41+/-0.04mm2 in the simvastatin, erythropoietin, PEG and saline groups, respectively. The simvastatin and PEG-treated animals showed increased sparing of the white matter at the injury epicenter and at 0.2mm rostral and 0.4mm caudal(p<0.05). CONCLUSION: Simvastatin and polyethylene glycol administration showed diminished secondary injury after SCI in rats. In addition, they showed almost the same efficacy. However, erythropoietin did not show neuroprotective effect.
