初步证据表明,默克尔细胞在人类表皮中发挥化学感知功能
Ilaria Piccini1, Jeremy Chéret1,2, Moe Tsutsumi3
1Monasterium Laboratory, Skin and Hair Research Solutions GmbH, Münster, Germany.
Experimental dermatology
|August 17, 2023
概括
人体皮肤上的上皮默克尔细胞 (MCs) 具有嗅觉受体 (ORs),特别是OR2AT4. 这些ORs的刺激会影响MCs,这表明超越触觉和温度感觉的新型化学感知作用.
科学领域:
- 皮肤病学 皮肤病学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- 皮肤上默克尔细胞 (MCs) 主要以轻触机械传导而闻名.
- 最近的发现表明,MCs也具有热敏性,扩大了它们已知的生理作用.
- 嗅觉受体 (ORs) 在非嗅觉组织中被确定,包括皮肤.
研究的目的:
- 研究人体表皮默克尔细胞 (MCs) 中嗅觉受体 (ORs) 的存在和功能.
- 确定OR激活在MC中是否影响它们的细胞过程和相互作用.
- 探索OR介导功能在皮肤健康中的潜在治疗应用.
主要方法:
- 使用免疫组织形态测量来量化MC中的蛋白质表达 (Piccolo,NGF).
- 使用活细胞成像来观察刺激时的细胞反应 (例如光变化).
- 应用合成气味剂 (Sandalore®) 来选择性地刺激人体皮肤样本中的嗅觉受体OR2AT4.
主要成果:
- 健康人体皮肤中的默克尔细胞 (MCs) 表达功能性嗅觉受体 (ORs),特别是OR2AT4.4.
- 使用Sandalore®刺激OR2AT4增加了Piccolo蛋白的表达,这表明囊泡贩运和回收的增强.
- 激活OR2AT4降低了神经生长因子 (NGF) 在MC中的免疫活性,并诱导了FFN206光的快速丧失,表明脱极化和分泌.
- 与角质细胞不同,OR2AT4刺激并没有改变MC数量或增殖状态.
结论:
- 皮肤上默克尔细胞 (MCs) 具有功能性嗅觉受体 (ORs),表现出超出机械传导的化学传感能力.
- 在MC中OR2AT4的激活会影响与囊泡贩运和神经变蛋白释放相关的细胞内过程.
- 这些发现为探索皮肤疾病中的MC化学传感功能以及皮肤健康的潜在治疗向开辟了道路.
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