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Published on: January 5, 2017
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Early Cancer Detection in Li-Fraumeni Syndrome with Cell-Free DNA
Derek Wong1, Ping Luo1, Leslie E Oldfield1
1Princess Margaret Cancer Centre, University Health Network, Toronto, Canada.
Cancer Discovery
|October 24, 2023
Summary
A novel multimodal liquid biopsy assay shows promise for early cancer detection in Li-Fraumeni syndrome (LFS) patients. This approach integrates multiple sequencing techniques to identify cancer signals before clinical diagnosis, improving surveillance for this high-risk group.
Area of Science:
- Oncology
- Genetics
- Molecular Diagnostics
Background:
- Li-Fraumeni syndrome (LFS) patients have a near 100% lifetime cancer risk due to TP53 gene variants.
- Intensive surveillance is standard for LFS patients, but early detection remains challenging.
Purpose of the Study:
- To establish a proof-of-principle for a multimodal liquid biopsy assay for early cancer detection in LFS.
- To evaluate the assay's performance in detecting cancer signals in LFS patients.
Main Methods:
- A longitudinal cohort of 89 LFS patients was studied.
- A multimodal liquid biopsy assay was developed, integrating targeted gene panel, shallow whole-genome, and cell-free methylated DNA immunoprecipitation sequencing.
- The assay's detection rate was compared between uni-modal and multimodal analyses.
Main Results:
- Multimodal analysis improved cancer detection rates in diagnosed LFS patients compared to uni-modal approaches.
- The assay detected cancer-associated signals in LFS carriers prior to conventional screening diagnosis.
- Positive predictive value was 67.6% and negative predictive value was 96.5% for pre-diagnosis detection.
Conclusions:
- This multimodal liquid biopsy assay offers a potential framework for enhanced cancer surveillance in LFS.
- Further clinical validation is necessary for integrating liquid biopsy into LFS surveillance protocols.
- Liquid biopsy demonstrates potential for earlier cancer detection and improved patient care in LFS.
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