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Related Experiment Video

Updated: Oct 28, 2025

MicroRNA Based Liquid Biopsy: The Experience of the Plasma miRNA Signature Classifier MSC for Lung Cancer Screening
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Single-cell microRNA sequencing method comparison and application to cell lines and circulating lung tumor cells.

Sarah M Hücker1, Tobias Fehlmann2, Christian Werno1

  • 1Division of Personalized Tumor Therapy, Fraunhofer-Institute for Toxicology and Experimental Medicine, Regensburg, Germany.

Nature Communications
|July 15, 2021
PubMed
Summary

Single cell small RNA sequencing protocols were evaluated for analyzing circulating tumor cells (CTCs). This method successfully identified miRNAs in CTCs, suggesting potential origins and cancer-related pathways.

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Area of Science:

  • Molecular Biology
  • Genomics
  • Oncology

Background:

  • Single-cell molecular analyses are crucial for understanding complex biological processes.
  • Small RNA sequencing provides valuable insights into gene regulation and disease mechanisms.

Purpose of the Study:

  • To evaluate and optimize protocols for single-cell small RNA sequencing.
  • To analyze miRNA expression in circulating tumor cells (CTCs) from small cell lung cancer (SCLC) patients.

Main Methods:

  • Systematic evaluation of 19 single-cell small RNA sequencing protocols using MCF7 cells.
  • Sequencing of single cells from diverse cell lines and 67 CTCs from SCLC patients.
  • Bioinformatic analysis including miRNA identification and enrichment analysis.

Main Results:

  • High reproducibility was observed across evaluated protocols.
  • A median of 68 miRNAs were detected in 67 CTCs, with 10 miRNAs consistently expressed.
  • Enrichment analysis pointed towards the lung as the likely organ of origin for CTCs and highlighted cancer-related pathways.

Conclusions:

  • Single-cell small RNA sequencing is a powerful tool for analyzing miRNA profiles in CTCs.
  • The study demonstrated the feasibility of identifying known and novel miRNAs in clinical samples.
  • Findings support the potential of this technique for cancer diagnostics and understanding metastasis.