Injury-induced mechanical hypersensitivity requires C-low threshold mechanoreceptors.

Injury-induced mechanical hypersensitivity requires C-low threshold mechanoreceptors.
复制标题

DOI:
10.1038/nature08505
复制
发表时间:
2009-12-03
期刊:
影响因子:
64.8
通讯作者:
--
中科院分区:
综合性期刊1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

机械性疼痛会导致与炎症和创伤相关的发病,但传达急性和持续性机械性疼痛感觉的初级感觉神经元尚未确定。背根神经节 (DRG) 神经元使用兴奋性递质谷氨酸将感觉信息传输到脊髓,这一过程依赖于谷氨酸转运到突触小泡中以调节胞吐释放。在这里,我们报告 DRG 中的一小部分细胞表达低丰度的囊泡谷氨酸转运蛋白 VGLUT3。在脊髓的背角,这些传入神经投射到 I 层和 II 层的最内层,这与损伤引起的持续性疼痛有关。由于不同的 VGLUT 亚型通常表现出非冗余的表达模式,因此我们使用 VGLUT3 敲除 (KO) 小鼠来评估 VGLUT3+ 初级传入神经在体感输入行为反应中的作用。 VGLUT3 的缺失会特别损害机械痛觉,特别是对伴随炎症、神经损伤和创伤的正常无害刺激的机械超敏反应。 DRG 中 VGLUT3+ 神经元的直接记录进一步将它们识别为人们知之甚少的无髓鞘低阈值机械感受器 (C-LTMR) 群体。对 VGLUT3 KO 小鼠的分析现在表明 C-LTMR 在损伤引起的机械超敏反应中发挥着关键作用。
Mechanical pain contributes to the morbidity associated with inflammation and trauma, but primary sensory neurons that convey the sensation of acute and persistent mechanical pain have not been identified. Dorsal root ganglion (DRG) neurons transmit sensory information to the spinal cord using the excitatory transmitter glutamate, a process that depends on glutamate transport into synaptic vesicles for regulated exocytotic release. Here we report that a small subset of cells in the DRG expresses the low abundance vesicular glutamate transporter VGLUT3. In the dorsal horn of the spinal cord, these afferents project to lamina I and the innermost layer of lamina II, which has previously been implicated in persistent pain caused by injury. Since the different VGLUT isoforms generally exhibit a nonredundant pattern of expression, we used VGLUT3 knock-out (KO) mice to assess the role of VGLUT3+ primary afferents in the behavioral response to somatosensory input. The loss of VGLUT3 specifically impairs mechanical pain sensation and in particular the mechanical hypersensitivity to normally innocuous stimuli that accompanies inflammation, nerve injury and trauma. Direct recording from VGLUT3+ neurons in the DRG further identifies them as a poorly understood population of unmyelinated, low threshold mechanoreceptors (C-LTMRs). The analysis of VGLUT3 KO mice now indicates a critical role for C-LTMRs in the mechanical hypersensitivity caused by injury.
DOI: 10.1523/jneurosci.4863-05.2006
发表时间: 2006-03-15
影响因子: 5.3
作者:
Albers, KM;Woodbury, CJ;Koerber, HR
通讯作者: Koerber, HR
DOI: 10.1038/nn2052
发表时间: 2008-03-01
影响因子: 25
作者:
Gras, Christelle;Amilhon, Benedicte;El Mestikawy, Salah
通讯作者: El Mestikawy, Salah
DOI: 10.1111/j.1749-6632.2002.tb04234.x
发表时间: 2002-01-01
期刊: NEUROENDOCRINE IMMUNE BASIS OF THE RHEUMATIC DISEASES II, PROCEEDINGS
影响因子: --
作者:
Schaible, HG;Ebersberger, A;Von Banchet, GS
通讯作者: Von Banchet, GS
DOI: 10.1016/0304-3959(87)91064-5
发表时间: 1987-01-01
期刊: PAIN
影响因子: 7.4
作者:
KAYSER, V;GUILBAUD, G
通讯作者: GUILBAUD, G