Neuroprotective effects of alpha-lipoic acid in experimental spinal cord injury in rats.

Authors:
Prof Tayfun Hakan, MD
Prof Tayfun Hakan, MD
Fatih Sultan Mehmet Training and Research Hospital
Prof. Dr.
Ata┼čehir, ─░stanbul | Turkey

J Spinal Cord Med 2010 ;33(4):401-9

Marmara University School of Pharmacy, Department of Pharmacology, Istanbul, Turkey.

Background: Oxidative stress is a mediator of secondary injury to the spinal cord following trauma.

Objective: To investigate the putative neuroprotective effect of alpha-lipoic acid (LA), a powerful antioxidant, in a rat model of spinal cord injury (SCI).

Methods: Wistar albino rats were divided as control, vehicle-treated SCI, and LA-treated SCI groups. To induce SCI, a standard weight-drop method that induced a moderately severe injury (100 g/cm force) at T10 was used. Injured animals were given either 50 mg/kg LA or saline at 30 minutes postinjury by intraperitoneal injection. At 7 days postinjury, neurologic examination was performed, and rats were decapitated. Spinal cord samples were taken for histologic examination or determination of malondialdehyde (MDA) and glutathione (GSH) levels, myeloperoxidase (MPO) activity, and DNA fragmentation. Formation of reactive oxygen species in spinal cord tissue samples was monitored by using a chemiluminescence (CL) technique.

Results: SCI caused a significant decrease in spinal cord GSH content, which was accompanied with significant increases in luminol CL and MDA levels, MPO activity, and DNA damage. Furthermore, LA treatment reversed all these biochemical parameters as well as SCI-induced histopathologic alterations. Conversely, impairment of the neurologic function caused by SCI remained unchanged.

Conclusion: The present study suggests that LA reduces SCI-induced oxidative stress and exerts neuroprotection by inhibiting lipid peroxidation, glutathione depletion, and DNA fragmentation.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2964029PMC
http://dx.doi.org/10.1080/10790268.2010.11689719DOI Listing
December 2010
57 Reads
1.878 Impact Factor

Publication Analysis

Top Keywords

spinal cord
24
activity dna
8
dna fragmentation
8
cord injury
8
oxidative stress
8
mpo activity
8
alpha-lipoic acid
8
spinal
6
cord
6
sci
5
fragmentation formation
4
glutathione gsh
4
levels myeloperoxidase
4
myeloperoxidase mpo
4
gsh levels
4
oxygen species
4
samples monitored
4
monitored chemiluminescence
4
chemiluminescence techniqueresults
4
techniqueresults sci
4

References

(Supplied by CrossRef)

Similar Publications