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首页> 外文期刊>Neuron >Phospholipase Cbeta 3 mediates the scratching response activated by the histamine H1 receptor on C-fiber nociceptive neurons.
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Phospholipase Cbeta 3 mediates the scratching response activated by the histamine H1 receptor on C-fiber nociceptive neurons.

机译:磷脂酶Cbeta 3介导由C纤维伤害感受神经元上的组胺H1受体激活的刮擦反应。

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Phospholipase Cbeta (PLCbeta) isozymes represent a family of molecules that link G protein-coupled receptors (GPCRs) to an intracellular signaling network. Here, we investigated the function of PLCbeta isozymes in sensory neurons by using mutant mice deficient for specific PLCbeta family members. Expression analysis indicated that PLCbeta3, one of the four isoforms, is predominantly expressed in a subpopulation of C-fiber nociceptors. A subset of these neurons expressed the histamine H1 receptor. Ca(2+) imaging studies revealed that PLCbeta3 specifically mediates histamine-induced calcium responses through the histamine H1 receptor in cultured sensory neurons. In line with this, we found that PLCbeta3(-/-) mice showed significant defects in scratching behavior induced by histamine; histamine-trifluoromethyl-toluidine (HTMT), a selective H1 agonist; and compound 48/80, a mast cell activator. These results demonstrate that PLCbeta3 is required to mediate "itch" sensation in response to histamine acting on the histamine H1 receptor in C-fiber nociceptive neurons.
机译:磷脂酶Cbeta(PLCbeta)同工酶代表将G蛋白偶联受体(GPCR)连接到细胞内信号传递网络的分子家族。在这里,我们通过使用缺乏特定PLCbeta家族成员的突变小鼠调查了PLCbeta同工酶在感觉神经元中的功能。表达分析表明,四种亚型之一PLCbeta3主要在C纤维伤害感受器的亚群中表达。这些神经元的一部分表达了组胺H1受体。 Ca(2+)成像研究表明,PLCbeta3通过培养的感觉神经元中的组胺H1受体特异性介导组胺诱导的钙反应。与此相符,我们发现PLCbeta3(-/-)小鼠在由组胺引起的抓挠行为中显示出明显的缺陷。组胺-三氟甲基-甲苯胺(HTMT),一种选择性的H1激动剂;化合物48/80,一种肥大细胞激活剂。这些结果表明,PLCbeta3需要介导“痒”感觉,以响应组胺作用于C纤维伤害感受神经元中的组胺H1受体。

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