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Antiallodynic effect of pregabalin in rat models of sympathetically maintained and sympathetic independent neuropathic pain.
Yonsei Med J. 2007 Feb 28; 48(1):41-7.YM

Abstract

Pregabalin binds to the voltage-dependent calcium channel alpha2delta subunit and modulates the release of neurotransmitters, resulting in analgesic effects on neuropathic pain. Neuropathic pain has both sympathetically maintained pain (SMP) and sympathetic independent pain (SIP) components. We studied the antiallodynic effects of pregabalin on tactile allodynia (TA) and cold allodynia (CA) in SMP-and SIP-dominant neuropathic pain models. Allodynia was induced by ligation of the L5 and L6 spinal nerves (SMP model) or by transection of the tibial and sural nerves (SIP model) in rats. For intrathecal drug administration, a PE-10 catheter was implanted through the atlantooccipital membrane to the lumbar enlargement. Pregabalin was administered either intraperitoneally (IP) or intrathecally (IT) and dosed up incrementally until an antiallodynic effect without sedation or motor impairment was apparent. TA was assessed using von Frey filaments, and CA was assessed using acetone drops. IP-administered pregabalin dose-dependently attenuated TA in both models and CA in the SMP model, but not CA in the SIP model. IT-administered pregabalin dose-dependently attenuated both TA and CA in both models. However, the dose response curve of IT-administered pregabalin in SMP was shifted to left from that of SIP and the ED50 of IT-administered pregabalin for CA in SMP was about 900 times less than that in SIP. These findings suggest that pregabalin exerts its antiallodynic effect mainly by acting at the spinal cord, and that IT-administered pregabalin has more potent antiallodynic effects in SMP. The alpha2delta subunit might be less involved in the CA in SIP.

Authors+Show Affiliations

Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Kangnam-gu, Seoul 135-720, Korea.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17326244

Citation

Han, Dong Woo, et al. "Antiallodynic Effect of Pregabalin in Rat Models of Sympathetically Maintained and Sympathetic Independent Neuropathic Pain." Yonsei Medical Journal, vol. 48, no. 1, 2007, pp. 41-7.
Han DW, Kweon TD, Lee JS, et al. Antiallodynic effect of pregabalin in rat models of sympathetically maintained and sympathetic independent neuropathic pain. Yonsei Med J. 2007;48(1):41-7.
Han, D. W., Kweon, T. D., Lee, J. S., & Lee, Y. W. (2007). Antiallodynic effect of pregabalin in rat models of sympathetically maintained and sympathetic independent neuropathic pain. Yonsei Medical Journal, 48(1), 41-7.
Han DW, et al. Antiallodynic Effect of Pregabalin in Rat Models of Sympathetically Maintained and Sympathetic Independent Neuropathic Pain. Yonsei Med J. 2007 Feb 28;48(1):41-7. PubMed PMID: 17326244.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Antiallodynic effect of pregabalin in rat models of sympathetically maintained and sympathetic independent neuropathic pain. AU - Han,Dong Woo, AU - Kweon,Tae Dong, AU - Lee,Jong Seok, AU - Lee,Youn-Woo, PY - 2007/2/28/pubmed PY - 2007/6/27/medline PY - 2007/2/28/entrez SP - 41 EP - 7 JF - Yonsei medical journal JO - Yonsei Med J VL - 48 IS - 1 N2 - Pregabalin binds to the voltage-dependent calcium channel alpha2delta subunit and modulates the release of neurotransmitters, resulting in analgesic effects on neuropathic pain. Neuropathic pain has both sympathetically maintained pain (SMP) and sympathetic independent pain (SIP) components. We studied the antiallodynic effects of pregabalin on tactile allodynia (TA) and cold allodynia (CA) in SMP-and SIP-dominant neuropathic pain models. Allodynia was induced by ligation of the L5 and L6 spinal nerves (SMP model) or by transection of the tibial and sural nerves (SIP model) in rats. For intrathecal drug administration, a PE-10 catheter was implanted through the atlantooccipital membrane to the lumbar enlargement. Pregabalin was administered either intraperitoneally (IP) or intrathecally (IT) and dosed up incrementally until an antiallodynic effect without sedation or motor impairment was apparent. TA was assessed using von Frey filaments, and CA was assessed using acetone drops. IP-administered pregabalin dose-dependently attenuated TA in both models and CA in the SMP model, but not CA in the SIP model. IT-administered pregabalin dose-dependently attenuated both TA and CA in both models. However, the dose response curve of IT-administered pregabalin in SMP was shifted to left from that of SIP and the ED50 of IT-administered pregabalin for CA in SMP was about 900 times less than that in SIP. These findings suggest that pregabalin exerts its antiallodynic effect mainly by acting at the spinal cord, and that IT-administered pregabalin has more potent antiallodynic effects in SMP. The alpha2delta subunit might be less involved in the CA in SIP. SN - 0513-5796 UR - https://www.unboundmedicine.com/medline/citation/17326244/Antiallodynic_effect_of_pregabalin_in_rat_models_of_sympathetically_maintained_and_sympathetic_independent_neuropathic_pain_ L2 - https://www.eymj.org/DOIx.php?id=10.3349/ymj.2007.48.1.41 DB - PRIME DP - Unbound Medicine ER -