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Clonogenic cell assay for anchorage-dependent squamous carcinoma cell lines using limiting dilution
R Grenman1, D Burk, E Virolainen
1Department of Otolaryngology/Head and Neck Surgery, University of Michigan, Ann Arbor 48109.
International Journal of Cancer
|July 15, 1989
Summary
A new 96-well plate assay effectively measures the sensitivity of squamous-cell carcinoma (SCC) cells to treatments, overcoming limitations of traditional soft agar clonogenic assays for these cancer types.
Area of Science:
- Oncology
- Cell Biology
- Cancer Research
Background:
- Clonogenic assays are vital for assessing tumor cell sensitivity to cytotoxic drugs and radiation.
- Traditional assays face challenges with squamous-cell carcinomas (SCC) due to poor cell viability and cloning efficiency, particularly in semi-solid media.
Purpose of the Study:
- To identify a reliable clonogenic assay for human squamous cancers.
- To evaluate the suitability of soft agar and 96-well plate assays for SCC cell lines.
Main Methods:
- Tested 13 human head and neck SCC lines for colony formation in soft agar.
- Assessed colony formation of 17 SCC lines in 96-well plates using limiting dilution.
- Compared plating efficiencies and evaluated the impact of cell migration.
Main Results:
- Only one of 13 SCC lines grew effectively in soft agar; another required epidermal growth factor.
- All 17 SCC lines demonstrated colony formation in the 96-well plate assay with higher plating efficiencies.
- The 96-well plate assay is not hindered by cell migration issues seen in some Petri dish assays.
Conclusions:
- The 96-well plate assay is broadly applicable to anchorage-dependent human SCC cell lines.
- This assay provides an efficient and reliable method for evaluating clonogenic cell survival in SCC.
- It overcomes the limitations of soft agar assays for assessing SCC sensitivity to therapies.