期刊
JOURNAL OF CELL SCIENCE
卷 127, 期 19, 页码 4159-4171出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jcs.147314
关键词
ATP release; Ca2+ wave; HaCaT cells; TRPC6; Hemichannels; Wound healing; Mechanotransduction; Pannexin
类别
资金
- Japan Society for the Promotion of Science (JSPS) Institutional Program for Young Researcher Overseas Visits
- Medical Research Grant of Kyousaidan
- JSPS KAKENHI [23300136, 24590274]
- Cabinet Office, Government of Japan
- JSPS through the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)
- Grants-in-Aid for Scientific Research [23300136, 24590274] Funding Source: KAKEN
Cutaneous wound healing is accelerated by exogenous mechanical forces and is impaired in TRPC6-knockout mice. Therefore, we designed experiments to determine how mechanical force and TRPC6 channels contribute to wound healing using HaCaT keratinocytes. HaCaT cells were pretreated with hyperforin, a major component of a traditional herbal medicine for wound healing and also a TRPC6 activator, and cultured in an elastic chamber. At 3 h after scratching the confluent cell layer, the ATP release and intracellular Ca2+ increases in response to stretching (20%) were live-imaged. ATP release was observed only in cells at the frontier facing the scar. The diffusion of released ATP caused intercellular Ca2+ waves that propagated towards the rear cells in a P2Y-receptor-dependent manner. The Ca2+ response and wound healing were inhibited by ATP diphosphohydrolase apyrase, the P2Y antagonist suramin, the hemichannel blocker CBX and the TRPC6 inhibitor diC8-PIP2. Finally, the hemichannel-permeable dye calcein was taken up only by ATP-releasing cells. These results suggest that stretch-accelerated wound closure is due to the ATP release through mechanosensitive hemichannels from the foremost cells and the subsequent Ca2+ waves mediated by P2Y and TRPC6 activation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据