Evaluation of the neuroprotective effect of chrysin via modulation of endogenous biomarkers in a rat model of spinal cord injury

Amit D Kandhare, V Shivakumar, Anuchandra Rajmane, Pinaki Ghosh, Subhash L Bodhankar
Journal of Natural Medicines 2014, 68 (3): 586-603
The objective of the present investigation was to evaluate the neuroprotective efficacy of chrysin in an experimental rat model of spinal cord injury (SCI). SCI was induced in male Sprague-Dawley rats by placing an aneurysm clip extradurally for 60 s at T10. The rats received treatment with either vehicle (SCI control) or chrysin (10, 20 and 40 mg/kg, p.o.) for 28 days. The various behavioral, biochemical and molecular parameters were determined. Chronic treatment with chrysin (20 and 40 mg/kg) significantly and dose-dependently (P < 0.05) attenuated the decrease in body weight, urine output, footprint analysis, sperm count and organ weight (testis, seminal vesicle and urinary bladder). It significantly improved (P < 0.05) the nociceptive threshold, motor and sensory nerve conduction velocity. The decreased activity of superoxide dismutase, reduced glutathione and membrane-bound inorganic phosphate were significantly (P < 0.05) restored by chrysin treatment. SCI resulted in a significant increase (P < 0.05) in lipid peroxidase, nitric oxide, tumor necrosis factor alpha, interleukin-1β, and bax whereas expression of bcl-2 and caspase-3 were significantly (P < 0.05) reduced. These changes were significantly reduced by treatment with chrysin (20 and 40 mg/kg, P < 0.05). Histological aberration induced after SCI in spinal cord, testis, kidney and urinary bladder were restored by treatment with chrysin (20 and 40 mg/kg). In conclusion, chrysin is a potential flavone-possessing antioxidant and its antiapoptotic property caused the subsequent recovery of both motor and sensory functions via modulation of endogenous biomarkers and neuronal apoptosis to inhibit the incidence of neurological deficits due to SCI.

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