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Effect of platelet-activating factor receptor expression on CHO cell motility
M Boccellino1, L Biancone, V Cantaluppi
1Department of Internal Medicine, University of Torino, Torino, Italy.
Journal of Cellular Physiology
|March 29, 2000
Summary
Platelet-activating factor (PAF) significantly enhances tumor cell motility and migration. This finding suggests PAF plays a crucial role in cancer growth and the spread of metastasis.
Area of Science:
- Oncology
- Cell Biology
- Biochemistry
Background:
- Tumor cell migration is critical for cancer progression, contributing to local expansion and metastasis.
- Platelet-activating factor (PAF) receptor is expressed in several tumors, but its role in tumor cell motility is not well understood.
- PAF is a known mediator of leukocyte and endothelial cell migration.
Purpose of the Study:
- To investigate the direct motogenic effect of PAF on cancer cells.
- To characterize the cellular and molecular responses of cancer cells to PAF stimulation.
Main Methods:
- Utilized Chinese hamster ovarian (CHO) cancer cells engineered to express the human PAF receptor (CHO PAF-R).
- Employed time-lapse recording to observe cell motility in response to PAF.
- Analyzed changes in cell speed, cytoskeleton actin distribution, and adhesion.
Main Results:
- PAF stimulation induced a rapid and significant increase in motility of CHO PAF-R cells.
- Motogenic response was observed in scattered cells, on fibronectin/collagen-coated surfaces, and in confluent monolayers.
- Cell speed peaked 6-8 hours post-stimulation, accompanied by cytoskeletal rearrangements and altered adhesion patterns.
Conclusions:
- PAF is a potent inducer of tumor cell motility.
- These findings highlight a potential role for PAF in promoting tumor growth and metastasis dissemination.
- Targeting the PAF pathway could offer new therapeutic strategies for cancer treatment.