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小脑伯格曼胶质细胞整合有害信息并调节伤害防御行为。

Cerebellar Bergmann glia integrate noxious information and modulate nocifensive behaviors.

作者信息

Kim Seung Ha, Lee Jaegeon, Jang Mirae, Roh Seung-Eon, Kim Soobin, Lee Ji Hwan, Seo Jewoo, Baek Jinhee, Hwang Jae Yoon, Baek In Seon, Lee Yong-Seok, Shigetomi Eiji, Lee C Justin, Koizumi Schuichi, Kim Sun Kwang, Kim Sang Jeong

机构信息

Department of Physiology, Seoul National University College of Medicine, Seoul, Korea.

Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea.

出版信息

Nat Neurosci. 2025 Feb;28(2):336-345. doi: 10.1038/s41593-024-01807-z. Epub 2025 Jan 2.

Abstract

The cerebellum is activated by noxious stimuli and pathological pain but its role in noxious information processing remains unknown. Here, we show that in mice, cutaneous noxious electrical stimuli induced noradrenaline (NA) release from locus coeruleus (LC) terminals in the cerebellar cortex. Bergmann glia (BG) accumulated these LC-NA signals by increasing intracellular calcium in an integrative manner ('flares'). BG flares were also elicited in response to an intraplantar capsaicin injection. Chemogenetic inactivation of LC terminals or BG in the cerebellar cortex or BG-specific knockdown of α-adrenergic receptors suppressed BG flares, reduced nocifensive licking and had analgesic effects in nerve injury-induced chronic neuropathic pain. Moreover, chemogenetic activation of BG or an intraplantar capsaicin injection reduced Purkinje cell firing, which may disinhibit the output activity of the deep cerebellar nuclei. These results suggest a role for BG in computing noxious information from the LC and in modulating pain-related behaviors by regulating cerebellar output.

摘要

小脑会被伤害性刺激和病理性疼痛激活,但其在伤害性信息处理中的作用尚不清楚。在此,我们表明,在小鼠中,皮肤伤害性电刺激可诱导去甲肾上腺素(NA)从蓝斑(LC)终末释放至小脑皮质。伯格曼胶质细胞(BG)通过以整合方式增加细胞内钙(“耀斑”)来积累这些LC-NA信号。足底注射辣椒素也会引发BG耀斑。小脑皮质中LC终末或BG的化学遗传学失活,或α-肾上腺素能受体的BG特异性敲低,均可抑制BG耀斑,减少伤害性舔舐,并对神经损伤诱导的慢性神经性疼痛具有镇痛作用。此外,BG的化学遗传学激活或足底注射辣椒素可减少浦肯野细胞放电,这可能会解除对小脑深部核团输出活动的抑制。这些结果表明,BG在处理来自LC的伤害性信息以及通过调节小脑输出调节疼痛相关行为方面发挥作用。

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