One-step determination of deletion mutation based on loop-mediated isothermal amplification.

Area of Science:

• Molecular Biology
• Oncology
• Genetics

Background:

• Deletion mutations are key drivers in disease development, particularly in cancer.
• Precision medicine necessitates efficient and specific methods for detecting deletion mutations.
• Current diagnostic approaches may lack the speed or sensitivity required for clinical practice.

Purpose of the Study:

• To develop a straightforward, sequence-specific, one-step assay for deletion mutation identification.
• To establish a rapid and ultrasensitive method for clinical application in cancer diagnostics.
• To demonstrate the assay's utility in identifying clinically relevant deletion mutations.

Main Methods:

• Utilized loop-mediated isothermal amplification (LAMP) for sensitive DNA amplification.
• Designed tailor-made primer sets for specific detection of deletion mutations.
• Validated the assay using cell lines and clinical samples, including EGFR p.E746-A750del.

Main Results:

• Achieved ultrasensitive detection of as low as 30 copies or 0.1% target variants.
• Demonstrated accurate identification of deletion mutations within 30 minutes under challenging conditions.
• Successfully identified the epidermal growth factor receptor (EGFR) p.E746-A750del mutation in non-small-cell lung cancer samples.

Conclusions:

• The developed LAMP-based assay is a rapid, sensitive, and specific tool for deletion mutation detection.
• This method holds potential as a molecular diagnostic tool for cancer diagnosis, therapy, and prognosis.
• The assay is adaptable for point-of-care testing scenarios, supporting personalized cancer treatment strategies.