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Updated: Sep 21, 2025
Circulating Tumor Cell Lines: an Innovative Tool for Fundamental and Translational Research
Published on: December 25, 2021
Cell Lines of Circulating Tumor Cells: What Is Known and What Needs to Be Resolved
Yutaka Shimada1, Tetsuo Sudo1, Shusuke Akamatsu2
1Department of Nanobio Drug Discovery, Graduated School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan.
Insights
Establishing circulating tumor cell (CTC) lines is crucial for cancer research but remains challenging. Current methods require specific cell characteristics and further development for widespread CTC line establishment.
Area of Science:
- Oncology
- Cell Biology
- Cancer Research
Background:
- Circulating tumor cells (CTCs) are vital biomarkers in cancer research.
- Detailed biological characterization of CTCs is limited by the scarcity of available cell lines.
- Thirty-nine CTC cell lines were documented by 2021.
Purpose of the Study:
- To review existing CTC cell lines for successful culturing.
- To analyze approaches for establishing long-term CTC cultures.
- To identify challenges and future directions in CTC cell line development.
Main Methods:
- Review of reported CTC cell lines and their culturing requirements.
- Analysis of previous studies on short-term and long-term CTC culture techniques.
- Identification of factors influencing CTC cell line establishment.
Main Results:
- Negative selection, hypoxic conditions, 3D culturing, and meticulous management aid long-term CTC culture.
- CTC cell line establishment is highly dependent on the unique properties of each cell type.
- A universal method for establishing CTC cell lines has not yet been developed.
Conclusions:
- Further research is essential to overcome the limitations in establishing CTC cell lines.
- Developing standardized methods for CTC line creation is critical for advancing cancer research.
- Addressing the heterogeneity of CTCs is key to future success in cell line development.
Abstract:
The importance of circulating tumor cells (CTC) is well recognized. However, the biological characteristics of CTC in the bloodstream have not yet been examined in detail, due to the limited number of CTC cell lines currently available. Thirty-nine CTC cell lines were reported by 2021. For successful cell culturing, these CTC cell lines were reviewed. Previous studies on short-term cultures of CTC also analyzed approaches for establishing the long-term culture of CTC. Negative selection, hypoxic conditions, three-dimensional conditions, and careful management are preferable for the long-term culture of CTC. However, the establishment of CTC cell lines is dependent on the specific characteristics of each cell type. Therefore, a method to establish CTC cell lines has not yet been developed. Further efforts are needed to resolve this issue.
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