Rare Event Phenotyping and Molecular Characterization: Circulating Tumor Cells.

Area of Science:

• Biotechnology
• Oncology
• Cell Biology

Background:

• Circulating tumor cells (CTCs) are crucial biomarkers for cancer management.
• Isolating CTCs from blood is challenging due to their rarity and the need for gentle handling.
• Current methods are often time-consuming and can compromise CTC integrity.

Purpose of the Study:

• To develop an automated, efficient, and gentle method for isolating and analyzing single CTCs.
• To enable comprehensive molecular and phenotypic characterization of CTCs.
• To link proteogenomic data from individual CTCs.

Main Methods:

• Automated flow cytometry utilizing red blood cell (RBC) lysis and magnetic, no-wash white blood cell (WBC) depletion.
• Development of adaptable sorting protocols for rare cell isolation.
• Application of multiparametric flow-cytometric panels for immunophenotyping.
• Whole transcriptome analysis for molecular characterization.
• Index sorting to link proteogenomic information.

Main Results:

• Successful isolation and analysis of single, viable CTCs from patient blood samples.
• Demonstration of a streamlined workflow combining cell isolation and molecular analysis.
• Capability to perform multiparametric immunophenotyping and whole transcriptome analysis on individual CTCs.
• Establishment of a link between proteomic and genomic data through index sorting.

Conclusions:

• The developed automated flow cytometry approach offers an efficient and noninvasive method for CTC isolation and analysis.
• This technique facilitates in-depth characterization of CTCs, aiding in cancer diagnosis and therapy monitoring.
• Linking proteogenomic data provides a more comprehensive understanding of individual CTCs.