Merkel cells are essential for light-touch responses.

Merkel cells are essential for light-touch responses.
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DOI:
10.1126/science.1172890
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发表时间:
2009-06-19
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Zoghbi HY
Zoghbi HY
中科院分区:
其他
文献类型:
--
作者:
Maricich SM;Wellnitz SA;Nelson AM;Lesniak DR;Gerling GJ;Lumpkin EA;Zoghbi HY

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外周神经系统检测不同的体感刺激,包括疼痛、温度和触摸。默克尔受体是由感觉传入和默克尔细胞组成的触觉受体。100多年来,默克尔细胞在轻触反应中扮演的角色一直是争议的中心。我们利用Cre-loxP技术有条件地从小鼠的身体、皮肤和足垫中删除了转录因子Atoh1。在Atoh1CKO动物的这些区域中没有Merkel细胞。来自Atoh1CKO动物的体外皮肤/神经制剂显示,正常情况下由Merkel受体介导的特有神经生理反应完全丧失。因此,默克尔细胞是正确编码默克尔受体反应所必需的,这表明这些细胞构成了躯体感觉系统不可或缺的一部分。
The peripheral nervous system detects different somatosensory stimuli including pain, temperature and touch. Merkel receptors are touch receptors composed of sensory afferents and Merkel cells. The role that Merkel cells play in light touch responses has been the center of controversy for over 100 years. We used Cre-loxP technology to conditionally delete the transcription factor Atoh1 from the body skin and foot pads of mice. Merkel cells are absent from these areas in Atoh1CKO animals. Ex vivo skin/nerve preparations from Atoh1CKO animals demonstrate complete loss of the characteristic neurophysiologic responses normally mediated by Merkel receptors. Merkel cells are therefore required for the proper encoding of Merkel receptor responses, suggesting that these cells form an indispensible part of the somatosensory system.
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