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Analytical Performance of a Highly Sensitive System to Detect Gene Variants Using Next-Generation Sequencing for Lung

Kikuya Kato1, Jiro Okami2, Harumi Nakamura3

  • 1Laboratory of Medical Genomics, Nara Institute of Science and Technology, Nara 630-0192, Japan.

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|May 16, 2023
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Summary

A new, highly sensitive next-generation sequencing (NGS) panel enables accurate multi-gene testing for lung cancer from limited biopsy samples. This compact panel demonstrates high concordance with approved tests, improving molecular diagnostics.

Keywords:
companion diagnosticsgene panelmolecular targeted therapynext-generation sequencingnon-small cell lung carcinoma

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Area of Science:

  • Oncology
  • Genetics
  • Molecular Biology

Background:

  • The rise of targeted therapies for lung cancer necessitates simultaneous multi-gene testing.
  • Conventional next-generation sequencing (NGS) panels often require high tumor content, which is frequently unmet by biopsy samples.

Purpose of the Study:

  • To develop and validate a novel, highly sensitive NGS panel for comprehensive molecular profiling of lung cancer.
  • To assess the panel's performance with limited biopsy samples commonly obtained in clinical practice.

Main Methods:

  • Development of a 'compact panel' utilizing NGS technology with enhanced sensitivity.
  • Evaluation of mutation detection limits for key lung cancer genes including EGFR, BRAF, and KRAS.
  • Assessment of quantitative mutation detection accuracy and fusion detection thresholds.
  • Concordance analysis against approved diagnostic tests for various genetic alterations (EGFR, BRAF, KRAS G12C, ALK, ROS1, MET, RET).

Main Results:

  • The compact panel achieved high sensitivity, with mutation detection limits as low as 0.14% for EGFR mutations.
  • Quantitative mutation detection showed high accuracy (correlation coefficients 0.966-0.992).
  • Fusion detection threshold was established at 1%.
  • The panel demonstrated excellent concordance with approved tests across multiple genes, with high identity rates for both positive and negative calls.

Conclusions:

  • The developed compact NGS panel offers high sensitivity and quantitative accuracy for multi-gene testing in lung cancer.
  • Its performance with limited biopsy samples reduces the need for strict pathological monitoring compared to conventional panels.
  • This panel represents a significant advancement for molecular diagnostics in lung cancer, facilitating personalized treatment strategies.