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Updated: Jan 22, 2026

Circulating Tumor Cell Lines: an Innovative Tool for Fundamental and Translational Research
Published on: December 25, 2021
Is small smarter? Nanomaterial-based detection and elimination of circulating tumor cells: current knowledge and
Alena Gribko1, Julian Künzel1, Désirée Wünsch1
1Nanobiomedicine Department/ENT, University Medical Center Mainz, Mainz 55131, Germany, roland.stauber@unimedizin-mainz.de; dinggb2012@sxu.edu.cn.
Abstract:
Circulating tumor cells (CTCs) are disseminated cancer cells. The occurrence and circulation of CTCs seem key for metastasis, still the major cause of cancer-associated deaths. As such, CTCs are investigated as predictive biomarkers. However, due to their rarity and heterogeneous biology, CTCs' practical use has not made it into the clinical routine. Clearly, methods for the effective isolation and reliable detection of CTCs are urgently needed. With the development of nanotechnology, various nanosystems for CTC isolation and enrichment and CTC-targeted cancer therapy have been designed. Here, we summarize the relationship between CTCs and tumor metastasis, and describe CTCs' unique properties hampering their effective enrichment. We comment on nanotechnology-based systems for CTC isolation and recent achievements in microfluidics and lab-on-a-chip technologies. We discuss recent advances in CTC-targeted cancer therapy exploiting the unique properties of nanomaterials. We conclude by introducing developments in CTC-directed nanosystems and other advanced technologies currently in (pre)clinical research.
Insights
Circulating tumor cells (CTCs) are crucial for metastasis but hard to detect. Nanotechnology offers promising solutions for isolating and targeting these rare cancer cells for improved diagnostics and therapies.
Area of Science:
- Oncology
- Nanotechnology
- Biomarkers
Background:
- Circulating tumor cells (CTCs) are disseminated cancer cells linked to metastasis, the primary cause of cancer mortality.
- Despite their potential as predictive biomarkers, CTCs' rarity and heterogeneity hinder clinical application.
- Effective isolation and detection methods for CTCs are critical for advancing cancer diagnostics and treatment.
Purpose of the Study:
- To review the role of CTCs in tumor metastasis.
- To discuss challenges in CTC enrichment due to their unique properties.
- To explore nanotechnology-based systems for CTC isolation, detection, and targeted therapy.
Main Methods:
- Literature review focusing on CTCs, metastasis, and nanotechnology applications.
- Analysis of recent advancements in microfluidics and lab-on-a-chip technologies for CTCs.
- Discussion of nanomaterial-based strategies for CTC-targeted cancer therapy.
Main Results:
- CTCs play a key role in cancer metastasis, but their characteristics pose significant isolation challenges.
- Nanotechnology, microfluidics, and lab-on-a-chip technologies show promise for CTC isolation and enrichment.
- Nanomaterials offer potential for targeted cancer therapies directed at CTCs.
Conclusions:
- Nanotechnology-based systems are advancing CTC isolation, detection, and targeted therapy.
- Further development in CTC-directed nanosystems and related technologies is ongoing in preclinical research.
- These advancements hold potential for improving clinical outcomes in cancer care.
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