期刊
CANCER SCIENCE
卷 107, 期 10, 页码 1430-1442出版社
WILEY-BLACKWELL
DOI: 10.1111/cas.13018
关键词
Actin-cytoskeleton; cell invasion; cell protrusions; pancreatic cancer; podocalyxin-like protein
类别
资金
- KAKENHI, Japan Society for the Promotion of Science [24591013, 15K14396]
- Grants-in-Aid for Scientific Research [15K09010] Funding Source: KAKEN
The cell-adhesion glycoprotein PODXL is associated with an aggressive tumor phenotype in several forms of cancer. Here, we report that high PODXL expression was an independent predictor of worse overall survival of pancreatic cancer patients, and that PODXL promoted pancreatic cancer cell motility and invasion by physically binding to the cytoskeletal protein gelsolin. Suppression of PODXL or gelsolin decreased membrane protrusions with abundant peripheral actin structures, and in turn inhibited cell motility and invasion. Transfection of a PODXL-rescue construct renewed the expression of gelsolin bound to peripheral actin structures in cell protrusions, and abrogated the decreased cell protrusions caused by the knockdown of PODXL. Furthermore, transfection of a PODXL-rescue construct into pancreatic cancer cells in which both PODXL and gelsolin were suppressed failed to increase the formation of the protrusions. Thus, PODXL enhances motility and invasiveness through an increase in gelsolin-actin interactions in cell protrusions.
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