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KMID : 0363620100310030079
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Journal of Korean Oriental Medicine
2010 Volume.31 No. 3 p.79 ~ p.97
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Effects of Bee Venom and Sweet Bee Venom Acupuncture on Functional Recovery and c-Fos Expression in the Brain after Sciatic Crushed Nerve Injury in Rats
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Choi Seung-Peom
Song Yun-Kyung
Lim Hyung-Ho
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Abstract
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Background: Peripheral nerve injuries are commonly encountered clinical problems and often result in severe functional deficit. Bee venom acupuncture has traditionally been used to treat several inflammatory diseases and chronic pain conditions.
Objectives: The aims of this study were to compare the effects of bee venom (general bee venom, BV) and sweet bee venom (allergen-removed bee venom, SBV) acupuncture on the recovery rate of locomotor function, the expression of brain-derived neurotrophic factor (BDNF) in the sciatic nerve, and the expression of c-Fos in the brain following sciatic crushed nerve injury in rats, and to evaluate differences due to administration areas.
Method: Walking track analysis, Western blot for BDNF and tyrosine receptor kinase B (TrkB), and immunohistochemistry for c-Fos were performed. In this study, comparative analyses of the effects of BV and SBV acupuncture in relation to administration sites, contralateral side or ipsilateral side, were conducted.
Results: In the present result, sciatic function index (SFI) in walking track analysis significantly decreased following sciatic crushed nerve injury. The expressions of BDNF and TrkB in the sciatic nerve increased after induction of sciatic crushed nerve injury. C-Fos expression in the ventrolateral periaqueductal gray (vlPAG) and paraventricular nucleus (PVN) also increased. BV and SBV acupuncture treatment improved the SFI in walking track analysis. Treatment with SBV at 1mg/kg showed more potent enhancing effect on SFI compared to BV. Treatment with 1mg/kg BV or 1mg/kg SBV acupuncture suppressed the BDNF and TrkB expression in the sciatic nerve. BV and SBV acupuncture treatment also suppressed c-Fos expression in the PVN and vlPAG regions. Treatment with SBV at 1mg/kg showed more potent suppressing effect on c-Fos expression compared to BV when injected into the contralateral side of the injured nerve. Generally we could not find significant difference in the effects between contralateral side and ipsilateral side of the injured nerve.
Conclusion: We have shown that BV and SBV acupuncture treatment can be used as the effective therapeutic modality to ameliorate the symptoms of sciatic crushed nerve injury.
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KEYWORD
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Sciatic nerve lesion, Bee venom, Walking, Brain-derived neurotrophic factor, TrkB receptor, C-Fos genes
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