Lamellar cells in Pacinian and Meissner corpuscles are touch sensors.

Lamellar cells in Pacinian and Meissner corpuscles are touch sensors.
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Pacinian和Meissner体体中的层状细胞是触摸传感器。

DOI:
10.1126/sciadv.abe6393
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发表时间:
2020-12
期刊:
影响因子:
13.6
通讯作者:
Bagriantsev SN
Bagriantsev SN
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Nikolaev YA;Feketa VV;Anderson EO;Schneider ER;Gracheva EO;Bagriantsev SN

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脊椎动物皮肤中的触觉小体使用神经元和非神经元机械感受来检测机械信号。覆盖在手掌和其他专门触觉器官上的皮肤含有高密度的机械感觉小体,这些小体被调谐以检测瞬时压力和振动。这些小体包括被板层细胞包围的感觉传入神经元。神经元传入被认为是机械传感器,而板层细胞的功能是未知的。我们发现,板层细胞内迈斯纳和环层小体检测触觉刺激。我们开发了一个准备票据皮肤从swellle-specialist鸭,允许从板层细胞的电生理记录,并证明它们包含机械门控离子通道。我们发现,从迈斯纳小体板层细胞产生机械诱发的动作电位使用R型电压门控钙通道。这些发现提供了第一个证据,R型通道依赖性动作电位在非神经元细胞,并证明板层细胞积极检测触摸。我们建议,迈斯纳和Pacinian小体使用神经元和非神经元的机械感受,以检测机械信号。
Tactile corpuscles in vertebrate skin use both neuronal and non-neuronal mechanoreception to detect mechanical signals. The skin covering the human palm and other specialized tactile organs contains a high density of mechanosensory corpuscles tuned to detect transient pressure and vibration. These corpuscles comprise a sensory afferent neuron surrounded by lamellar cells. The neuronal afferent is thought to be the mechanical sensor, whereas the function of lamellar cells is unknown. We show that lamellar cells within Meissner and Pacinian corpuscles detect tactile stimuli. We develop a preparation of bill skin from tactile-specialist ducks that permits electrophysiological recordings from lamellar cells and demonstrate that they contain mechanically gated ion channels. We show that lamellar cells from Meissner corpuscles generate mechanically evoked action potentials using R-type voltage-gated calcium channels. These findings provide the first evidence for R-type channel-dependent action potentials in non-neuronal cells and demonstrate that lamellar cells actively detect touch. We propose that Meissner and Pacinian corpuscles use neuronal and non-neuronal mechanoreception to detect mechanical signals.
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