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Updated: Aug 19, 2026
A Multiplexed Luciferase-based Screening Platform for Interrogating Cancer-associated Signal Transduction in Cultured Cells
Published on: July 3, 2013
Construction and characterization of multiple human colon cancer cell lines for inducibly regulated gene expression
Arkadiusz Welman1, Christopher Cawthorne, Jane Barraclough
1Cancer Research UK, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Wilmslow Road, Manchester M20 4BX, United Kingdom. awelman@picr.man.ac.uk
Abstract:
Validation of targets for cancer drug discovery requires robust experimental models. Systems based on inducible gene expression are well suited to this purpose but are difficult to establish in several epithelial cell types. Using the recently discovered transcriptional transactivator (rtTA2S-M2), we developed a strategy for fast and efficient generation of Tet On cells. Multiple clones of HCT116, SW480, and HT29 human colon cancer cells for doxycycline-regulated gene expression were constructed that constitutively express green fluorescent protein (GFP) for selection/maintenance purposes. The cell lines displayed good fold inducibility (49-124xHCT116; 178-621xSW480; 261-787xHT29) and minimal leakiness after transient transfection with a luciferase reporter or with vectors driving inducible expression of red fluorescent protein (dsRed2), constitutively active c-Src or dominant negative K-Ras4B. The clones preserved their transformed phenotype as demonstrated by comparing their properties to respective wild type cells, in terms of growth in vitro and in vivo (as tumor xenografts), cell cycle traverse, and sensitivity to drugs used in chemotherapy. These engineered cell lines enabled tightly controlled inducible gene expression both in vitro and in vivo, and proved well suited for construction of double-stable cell lines inducibly expressing a protein of interest. As such they represent a useful research tool for example, to dissect oncogene function(s) in colon cancer. Supplementary material for this article be found at http://www.mrw.interscience.wiley.com/suppmat/0730-2312/suppmat/94/suppmat_welman.doc.
Insights
Researchers developed new Tet On colon cancer cell lines for precise gene control in cancer drug discovery. These models enable robust validation of therapeutic targets and oncogene function studies.
Area of Science:
- Molecular Biology
- Cancer Research
- Cell Biology
Background:
- Establishing inducible gene expression systems in epithelial cells for cancer research is challenging.
- Robust experimental models are crucial for validating cancer drug targets.
- The recently discovered transcriptional transactivator (rtTA2S-M2) offers a new tool for gene regulation.
Purpose of the Study:
- To develop a fast and efficient method for creating Tet On colon cancer cell lines.
- To engineer HCT116, SW480, and HT29 cells for doxycycline-regulated gene expression.
- To provide a versatile tool for studying oncogene function in colon cancer.
Main Methods:
- Utilized the rtTA2S-M2 transactivator to create Tet On cell lines.
- Constructed multiple clones of HCT116, SW480, and HT29 cells.
- Incorporated constitutive green fluorescent protein (GFP) expression for selection and maintenance.
- Assessed inducibility and leakiness using luciferase and dsRed2 reporters, c-Src, and K-Ras4B.
Main Results:
- Generated multiple Tet On clones in HCT116, SW480, and HT29 human colon cancer cells.
- Achieved high fold inducibility (49-787x) with minimal leakiness.
- Confirmed preservation of transformed phenotypes, including in vitro/in vivo growth and drug sensitivity.
- Demonstrated successful construction of double-stable cell lines with inducible protein expression.
Conclusions:
- The engineered Tet On colon cancer cell lines provide tightly controlled inducible gene expression.
- These cell lines are suitable for both in vitro and in vivo studies.
- The developed cell lines serve as a valuable research tool for dissecting oncogene functions in colon cancer and for cancer drug discovery.
