Cutaneous pigmentation modulates skin sensitivity via tyrosinase-dependent dopaminergic signalling.

Cutaneous pigmentation modulates skin sensitivity via tyrosinase-dependent dopaminergic signalling.
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皮肤色素沉着通过酪氨酸酶依赖性多巴胺能信号调节皮肤敏感性。

DOI:
10.1038/s41598-017-09682-4
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发表时间:
2017-08-23
期刊:
影响因子:
4.6
通讯作者:
Schmidt BL
Schmidt BL
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ono K;Viet CT;Ye Y;Dang D;Hitomi S;Toyono T;Inenaga K;Dolan JC;Schmidt BL

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我们提出了一个新的机制,感觉调制通过皮肤多巴胺能信号。我们假设多巴胺能信号有助于皮肤敏感性的差异,在较深与较浅的有色人种和小鼠品系。我们发现,热和机械皮肤的敏感性是色素沉着依赖。对人类和小鼠的荟萃分析以及我们自己的小鼠行为研究沿着显示,相对于色素较少或白化病皮肤,色素沉着皮肤的热敏感性更高。我们表明,多巴胺从黑素细胞激活D1样多巴胺受体的初级感觉神经元。多巴胺能激活增加热敏TRPV 1离子通道的表达,减少机械敏感Piezo 2通道的表达;色素沉着皮肤的热阈值较低,机械阈值较高。
We propose a new mechanism of sensory modulation through cutaneous dopaminergic signalling. We hypothesize that dopaminergic signalling contributes to differential cutaneous sensitivity in darker versus lighter pigmented humans and mouse strains. We show that thermal and mechanical cutaneous sensitivity is pigmentation dependent. Meta-analyses in humans and mice, along with our own mouse behavioural studies, reveal higher thermal sensitivity in pigmented skin relative to less-pigmented or albino skin. We show that dopamine from melanocytes activates the D1-like dopamine receptor on primary sensory neurons. Dopaminergic activation increases expression of the heat-sensitive TRPV1 ion channel and reduces expression of the mechanically-sensitive Piezo2 channel; thermal threshold is lower and mechanical threshold is higher in pigmented skin.
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发表时间: 2005-01-01
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