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IL-8 increases integrin expression and cell motility in human chondrosarcoma cells.
Chun-Yi Lee1, Chun-Yin Huang, Meng-Yi Chen
1Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan.
Journal of Cellular Biochemistry
|May 19, 2011
Summary
Interleukin-8 (IL-8) promotes chondrosarcoma cell migration and alpha-v beta-3 integrin expression. This occurs via the PI3K/Akt/AP-1 signaling pathway, offering potential therapeutic targets for this aggressive cancer.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Chondrosarcoma is a malignant bone tumor known for local invasion and metastasis, frequently to the lungs.
- Interleukin-8 (IL-8), a pro-tumorigenic chemokine, is overexpressed in various human cancers.
- The specific role of IL-8 in chondrosarcoma cell migration and integrin expression remained largely uncharacterized.
Purpose of the Study:
- To investigate the effect of IL-8 on the migration and integrin expression of human chondrosarcoma cells.
- To elucidate the underlying signaling pathways involved in IL-8-mediated effects in chondrosarcoma.
Main Methods:
- Treatment of human chondrosarcoma cells with IL-8.
- Assessment of cell migration and alpha-v beta-3 (αvβ3) integrin expression.
- Analysis of phosphatidylinositol 3-kinase (PI3K)/Akt and AP-1 pathway activation using inhibitors and mutants.
Main Results:
- IL-8 significantly increased chondrosarcoma cell migration.
- IL-8 elevated the expression of αvβ3 integrin in these cells.
- Activation of PI3K, Akt, and AP-1 signaling pathways was observed following IL-8 treatment.
- Inhibition of these pathways abrogated IL-8-induced integrin expression and migration.
Conclusions:
- IL-8 enhances chondrosarcoma cell migration and αvβ3 integrin expression.
- The PI3K/Akt/AP-1 signaling pathway mediates these IL-8 effects.
- Targeting the IL-8 signaling pathway may represent a therapeutic strategy for chondrosarcoma metastasis.
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