期刊
JOURNAL OF CELL SCIENCE
卷 122, 期 10, 页码 1637-1646出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jcs.046219
关键词
Actin; Discoidin domain receptor; Integrin; Migration; Non-muscle myosin IIA; Cell spreading
类别
资金
- Canadian Institutes of Health Research [MOP 158698, 416228]
- Canada Research Chairs Program
The spreading and migration of cells on adhesive substrates is regulated by the counterbalance of contractile and protrusive forces. Non-muscle myosin IIA, an ubiquitously expressed contractile protein and enzyme, is implicated in the regulation of cell spreading and directional migration in response to various stimuli. Here we show that discoidin domain receptor 1 (DDR1), a tyrosine kinase receptor activated by type I collagen, associates with the non-muscle myosin IIA heavy chain (NMHC-IIA) upon ligand stimulation. An association was also indicated by coimmunoprecipitation of NMHC-IIA with full-length DDR1, but not with the truncated DDR1d-isoform lacking the kinase domain. DDR1 was important for assembly of NMHC-IIA into filaments on cells plated on collagen. DDR1 expression inhibited cell spreading over collagen but promoted cell migration. By contrast, blockade of non-muscle myosin II activity by blebbistatin enhanced cell spreading but inhibited migration over collagen. We propose that myosin and DDR1 impact cell spreading and migration by regulating adhesive contacts with collagen.
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