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[Effect of electroacupuncture intervention on spinal AMPA-receptor expression in rats with neuropathic pain].
Zhen Ci Yan Jiu. 2014 Oct; 39(5):382-6.ZC

Abstract

OBJECTIVE

To observe the effect of electroacupuncture (EA) intervention on changes of spinal a-amino-3- ydroxy-5-methylisoxazole-4-propionate acid (AMPA) receptor (GluR 1) expression in rats with chronic constrictive injury (CCI) pain, so as to explore its mechanisms underlying improvement of neuropathic pain.

METHODS

Sixty male SD rats were randomly divided into sham-operation, CCI model and EA groups (n=20). Neuropathic pain model was established by ligature of the right sciatic nerve. EA stimulation (2 Hz, 1-3 mA) was applied to "Weizhong" (BL 40) and "Huantiao" (GB 30) on the injured limb for 30 min, once a day for 7 days beginning from the 11th day on after CCI. The mechanical and thermal pain thresholds were measured before and after the CCI procedure (baseline) and after EA intervention. The AMPA receptor subunit GluR 1 protein and gene expression in L5-L 6 segments of the spinal cord was detected using Western blot (WB), immunohistochemistry and re- verse transcription (RT)-polymerase chain reaction (PCR), separately.

RESULTS

As the results of mechanical and thermal pain thresholds in our past study, EA intervention could markedly raise CCl-reduced decreased pain threshold. Compared with the sham-operation group, the expression levels of spinal GluR 1 protein and mRNA in the model group were significantly increased (P<0.05, P<0.01). Following EA intervention, the expression levels of GluR 1 protein and mRNA were remarkably down-regulated in the EA group in comparison with those of the model group (all P<005).

CONCLUSION

EA intervention can down-regulate CCI-induced increase of AMPA receptor GIuR 1 expression in the lumbar spinal cord in CCI rats, which may contribute to its effect in alleviating neuropathic pain.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

English Abstract
Journal Article
Research Support, Non-U.S. Gov't

Language

chi

PubMed ID

25518112

Citation

Wang, Chao, et al. "[Effect of Electroacupuncture Intervention On Spinal AMPA-receptor Expression in Rats With Neuropathic Pain]." Zhen Ci Yan Jiu = Acupuncture Research, vol. 39, no. 5, 2014, pp. 382-6.
Wang C, Xie WJ, Liu M, et al. [Effect of electroacupuncture intervention on spinal AMPA-receptor expression in rats with neuropathic pain]. Zhen Ci Yan Jiu. 2014;39(5):382-6.
Wang, C., Xie, W. J., Liu, M., Yan, J., Zhang, J. L., Liu, Z., & Guo, L. N. (2014). [Effect of electroacupuncture intervention on spinal AMPA-receptor expression in rats with neuropathic pain]. Zhen Ci Yan Jiu = Acupuncture Research, 39(5), 382-6.
Wang C, et al. [Effect of Electroacupuncture Intervention On Spinal AMPA-receptor Expression in Rats With Neuropathic Pain]. Zhen Ci Yan Jiu. 2014;39(5):382-6. PubMed PMID: 25518112.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Effect of electroacupuncture intervention on spinal AMPA-receptor expression in rats with neuropathic pain]. AU - Wang,Chao, AU - Xie,Wen-juan, AU - Liu,Mi, AU - Yan,Jie, AU - Zhang,Jia-li, AU - Liu,Zhao, AU - Guo,Li-na, PY - 2014/12/19/entrez PY - 2014/12/19/pubmed PY - 2015/3/13/medline SP - 382 EP - 6 JF - Zhen ci yan jiu = Acupuncture research JO - Zhen Ci Yan Jiu VL - 39 IS - 5 N2 - OBJECTIVE: To observe the effect of electroacupuncture (EA) intervention on changes of spinal a-amino-3- ydroxy-5-methylisoxazole-4-propionate acid (AMPA) receptor (GluR 1) expression in rats with chronic constrictive injury (CCI) pain, so as to explore its mechanisms underlying improvement of neuropathic pain. METHODS: Sixty male SD rats were randomly divided into sham-operation, CCI model and EA groups (n=20). Neuropathic pain model was established by ligature of the right sciatic nerve. EA stimulation (2 Hz, 1-3 mA) was applied to "Weizhong" (BL 40) and "Huantiao" (GB 30) on the injured limb for 30 min, once a day for 7 days beginning from the 11th day on after CCI. The mechanical and thermal pain thresholds were measured before and after the CCI procedure (baseline) and after EA intervention. The AMPA receptor subunit GluR 1 protein and gene expression in L5-L 6 segments of the spinal cord was detected using Western blot (WB), immunohistochemistry and re- verse transcription (RT)-polymerase chain reaction (PCR), separately. RESULTS: As the results of mechanical and thermal pain thresholds in our past study, EA intervention could markedly raise CCl-reduced decreased pain threshold. Compared with the sham-operation group, the expression levels of spinal GluR 1 protein and mRNA in the model group were significantly increased (P<0.05, P<0.01). Following EA intervention, the expression levels of GluR 1 protein and mRNA were remarkably down-regulated in the EA group in comparison with those of the model group (all P<005). CONCLUSION: EA intervention can down-regulate CCI-induced increase of AMPA receptor GIuR 1 expression in the lumbar spinal cord in CCI rats, which may contribute to its effect in alleviating neuropathic pain. SN - 1000-0607 UR - https://www.unboundmedicine.com/medline/citation/25518112/[Effect_of_electroacupuncture_intervention_on_spinal_AMPA_receptor_expression_in_rats_with_neuropathic_pain]_ DB - PRIME DP - Unbound Medicine ER -