首页    期刊浏览 2024年12月05日 星期四
登录注册

文章基本信息

  • 标题:Cholinergic chemosensory cells in the trachea regulate breathing
  • 本地全文:下载
  • 作者:Gabriela Krasteva ; Brendan J. Canning ; Petra Hartmann
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:2011
  • 卷号:108
  • 期号:23
  • 页码:9478-9483
  • DOI:10.1073/pnas.1019418108
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:In the epithelium of the lower airways, a cell type of unknown function has been termed "brush cell" because of a distinctive ultrastructural feature, an apical tuft of microvilli. Morphologically similar cells in the nose have been identified as solitary chemosensory cells responding to taste stimuli and triggering trigeminal reflexes. Here we show that brush cells of the mouse trachea express the receptors (Tas2R105, Tas2R108), the downstream signaling molecules (-gustducin, phospholipase C{beta}2) of bitter taste transduction, the synthesis and packaging machinery for acetylcholine, and are addressed by vagal sensory nerve fibers carrying nicotinic acetylcholine receptors. Tracheal application of an nAChR agonist caused a reduction in breathing frequency. Similarly, cycloheximide, a Tas2R108 agonist, evoked a drop in respiratory rate, being sensitive to nicotinic receptor blockade and epithelium removal. This identifies brush cells as cholinergic sensors of the chemical composition of the lower airway luminal microenvironment that are directly linked to the regulation of respiration.
  • 关键词:airway sensory innervation ; respiratory epithelium ; jugular--nodose ganglion ; bitter-tasting substances
国家哲学社会科学文献中心版权所有