Foxp3 expression in human cancer cells
Vaios Karanikas1, Matthaios Speletas, Maria Zamanakou
1Cancer Immunology Unit, Department of Immunology and Histocompatibility, School of Medicine, University of Thessaly, University Hospital of Larissa, GR-411 10 Larissa, Greece. vkaran@med.uth.gr
Journal of Translational Medicine
|April 24, 2008
Summary
Forkhead box protein 3 (Foxp3) is expressed in various cancer cell lines, not just regulatory T cells. This discovery may impact future cancer therapies targeting Foxp3.
Area of Science:
- Immunology
- Molecular Biology
- Oncology
Background:
- Forkhead box protein 3 (Foxp3) is a key transcription factor for regulatory T cells (Tregs).
- Previous studies indicated Foxp3 expression in non-thymus tissues and pancreatic carcinoma.
- The constitutive expression of Foxp3 in diverse tumor types remained largely uninvestigated.
Purpose of the Study:
- To investigate the presence and expression levels of Foxp3 transcripts and mature protein in various tumor cell lines.
- To determine if Foxp3 expression is a general characteristic of tumor cells across different tissue origins.
Main Methods:
- Analyzed 25 tumor cell lines from lung, colon, breast cancer, melanoma, and leukemia.
- Detected Foxp3 mRNA using RT-PCR and quantitative real-time PCR.
- Assessed Foxp3 protein expression via immunocytochemistry and flow cytometry.
Main Results:
- Foxp3 mRNA and protein were detected in all tested tumor cell lines.
- Expression levels varied but were not linked to the tumor's tissue of origin.
- Foxp3 expression correlated with interleukin-10 (IL-10) and transforming growth factor-beta 1 (TGF-β1) levels.
Conclusions:
- Foxp3 expression is a characteristic feature of tumor cells from diverse origins.
- Further research is needed to understand the role of Foxp3 in tumor immune escape.
- Findings may inform anti-cancer strategies targeting Foxp3.
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