首页    期刊浏览 2025年06月10日 星期二
登录注册

文章基本信息

  • 标题:Spontaneous electrical activity of interstitial cells of Cajal isolated from canine proximal colon
  • 本地全文:下载
  • 作者:P Langton ; S M Ward ; A Carl
  • 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:1989
  • 卷号:86
  • 期号:18
  • 页码:7280-7284
  • DOI:10.1073/pnas.86.18.7280
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:Interstitial cells of Cajal (ICC) have been suggested as pacemaker cells in the gastrointestinal tract. A method was developed to isolate ICC from the slow-wave pacemaker region of the canine proximal colon. These cells were identified under phase-contrast microscopy, and their identity was verified by comparing their ultrastructure with the morphology of ICC in situ. Patch-clamp experiments demonstrated that these cells are excitable; voltage-dependent inward and outward currents were elicited by depolarization. Inward current transients were identified as calcium currents. A portion of the outward current appears to be due to Ca2+-activated K channels commonly expressed in these cells. ICC were also spontaneously active, generating electrical depolarizations similar in waveform to slow-wave events of intact colonic muscles. These findings are consistent with the hypothesis that ICC initiate rhythmicity in the colon.
国家哲学社会科学文献中心版权所有