Improved outcome after spinal cord compression injury in mice treated with docosahexaenoic acid.
Exp Neurol
; 239: 13-27, 2013 Jan.
Article
en En
| MEDLINE
| ID: mdl-23026410
ABSTRACT
In this study we have characterised the locomotor recovery, and temporal profile of cell loss, in a novel thoracic compression spinal cord injury (SCI) in the mouse. We have also shown that treatment with docosahexaenoic acid (DHA) is neuroprotective in this model of SCI, strengthening the growing literature demonstrating that omega-3 polyunsaturated fatty acids are neuroprotective after SCI. Compression SCI in C57BL/6 mice was produced by placing a 10 g weight for 5 min onto a 2 mm × 1.5 mm platform applied to the dura at vertebral level T12. Mice partly recovered from complete hindlimb paralysis and by 28 days post-surgery had plateaued at an average BMS locomotor score of 4.2, equivalent to weight support with plantar stepping. During the same period, neuronal loss at the epicentre increased from 26% of ventral horn neurons by day 1, to 68% by day 28. Delayed loss of oligodendrocytes was also seen (e.g. 84% by day 28 in the dorsal columns) and microglia/macrophage activation was maximal at 7 days. In contrast, axonal damage, judged by a decrease in the non-phosphorylated form of 200 kD neurofilament, was an early event, as the loss was seen by day 1 and did not change markedly over time. Mice that received an intravenous (i.v.) injection of 500 nmol/kg DHA 30 min after SCI, showed improved locomotor recovery and, at 28 day survival, reduced neuronal, oligodendrocyte and neurofilament loss, and reduced microglia/macrophage activation. For some of these indices of SCI, enrichment of the diet with 400 mg/kg/day DHA led to further improvement. However, dietary DHA supplementation, without the initial i.v. injection, was ineffective.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Compresión de la Médula Espinal
/
Ácidos Docosahexaenoicos
Tipo de estudio:
Etiology_studies
/
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Exp Neurol
Año:
2013
Tipo del documento:
Article
País de afiliación:
Reino Unido