Isolation and Genomic Analysis of Circulating Tumor Cell Clusters in Cancer Patients

Area of Science:

• Oncology
• Genomics
• Cell Biology

Background:

• Circulating tumor cell (CTC) clusters play a significant role in cancer metastasis.
• Heterotypic clusters, comprising tumor and normal cells, are common in solid tumors.
• Existing methods lack precision in quantifying tumor cell proportions within clusters.

Purpose of the Study:

• To develop and validate a novel method for accurately determining the tumor fraction in CTC clusters.
• To enable precise enumeration of tumor cells within both homotypic and heterotypic clusters.

Main Methods:

• Isolation and collection of individual CTC clusters.
• Low-pass whole genome sequencing for assessing copy number alterations within single clusters.
• Bioinformatic analysis pipeline for interpreting sequencing data and estimating tumor fraction.

Main Results:

• Successfully implemented a method for single-cluster isolation and genomic analysis.
• Demonstrated the capability to accurately estimate tumor cell fractions within CTC clusters.
• Established a foundation for improved understanding of cluster composition in metastasis.

Conclusions:

• The described method offers a significant advancement in analyzing CTC cluster heterogeneity.
• Accurate tumor fraction estimation is vital for understanding metastatic potential and guiding treatment.
• This technique facilitates deeper insights into the role of CTC clusters in cancer progression.