中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (14): 1337-1340.

• 观点:周围神经损伤修复保护与再生 • 上一篇    下一篇

周围神经损伤后神经元变化及肾上腺素受体α1的表达

  

  • 收稿日期:2014-07-14 出版日期:2014-07-25 发布日期:2014-07-25

Neuronal changes resulting in up-regulation of alpha-1 adrenoceptors after peripheral nerve injury

Peter D. Drummond   

  1. Centre for Research on Chronic Pain and Inflammatory Diseases, Murdoch University, Perth, Western Australia, Australia
  • Received:2014-07-14 Online:2014-07-25 Published:2014-07-25
  • Contact: Peter D. Drummond, Ph.D., School of Psychology and Exercise Science, Murdoch University, 6150 Western Australia, P.Drummond@murdoch.edu.au.
  • Supported by:

    This work was supported by grants from the National Health and Medical Research Council of Australia and the Australian and New Zealand College of Anaesthetists.

摘要:

西澳大利亚莫道克大学慢性疼痛及炎性疾病研究中心Peter D. Drummond教授研究发现,神经病理性疼痛的主要原因是由早期免疫细胞浸润到损伤组织中释放的炎症介质引起。这些介质可直接或通过神经营养因子的诱导,触发围绕损伤部位神经元和其他细胞增加肾上腺素受体α1的表达。反之,被激活的肾上腺素受体α1又触发成纤维细胞和角质化细胞进一步释放生长因子和炎性介质。因此,肾上腺素受体α1的表达是这些受损细胞和再生的神经元产生炎症和疼痛的重要原因。作者认为,肾上腺素受体α1将成为损伤的周围神经出现神经性疼痛治疗的重要靶点。

Abstract:

Under normal conditions, the sympathetic neurotransmitter noradrenaline inhibits the production and release of pro-inflammatory cytokines. However, after peripheral nerve and tissue injury, pro-inflammatory cytokines appear to induce the expression of the alpha1A-adrenoceptor subtype on immune cells and perhaps also on other cells in the injured tissue. In turn, noradrenaline may act on up-regulated alpha1-adrenoceptors to increase the production of the pro-inflammatory cytokine interleukin-6. In addition, the release of inflammatory mediators and nerve growth factor from keratinocytes and other cells may augment the expression of alpha1-adrenoceptors on peripheral nerve fibers. Consequently, nociceptive afferents acquire an abnormal excitability to adrenergic agents, and inflammatory processes build. These mechanisms could contribute to the development of sympathetically maintained pain in conditions such as post-herpetic neuralgia, cutaneous neuromas, amputation stump pain and complex regional pain syndrome.

Key words: alpha1-adrenoceptors, up-regulation, peripheral nerve injury, nerve growth factor, pro-inflammatory mediators, complex regional pain syndrome