A role for Kalirin-7 in nociceptive sensitization via activity-dependent modulation of spinal synapses.

A role for Kalirin-7 in nociceptive sensitization via activity-dependent modulation of spinal synapses.
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Kalirin-7 通过脊髓突触的活动依赖性调节在伤害性敏化中的作用

DOI:
10.1038/ncomms7820
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发表时间:
2015-04-13
影响因子:
16.6
通讯作者:
Kuner, Rohini
Kuner, Rohini
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Lu, Jianning;Luo, Ceng;Bali, Kiran Kumar;Xie, Rou-Gang;Mains, Richard E.;Eipper, Betty A.;Kuner, Rohini

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突触可塑性是持续伤害性活动引起的正常伤害性敏感性变化的基础。Kalirin-7是Rho gtpase的多功能鸟嘌呤核苷酸交换因子(GEF),其特点是定位于兴奋性突触,与谷氨酸受体相互作用,并具有动态调节神经元细胞骨架的能力。本研究表明,脊髓表达的Kalirin-7对于持续的痛觉活动依赖性突触长时程增强以及脊髓背角突触棘的活动依赖性重构是必需的,从而在炎症性疼痛过程中协调功能和结构的可塑性。
Synaptic plasticity is the cornerstone of processes underlying persistent nociceptive activity-induced changes in normal nociceptive sensitivity. Kalirin-7 is a multifunctional guanine-nucleotide-exchange factor (GEF) for Rho GTPases that is characterized by its localization at excitatory synapses, interactions with glutamate receptors and its ability to dynamically modulate the neuronal cytoskeleton. Here we show that spinally expressed Kalirin-7 is required for persistent nociceptive activity-dependent synaptic long-term potentiation as well as activity-dependent remodelling of synaptic spines in the spinal dorsal horn, thereby orchestrating functional and structural plasticity during the course of inflammatory pain.
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