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Related Experiment Video

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Identification of Homologous Recombination Events in Mouse Embryonic Stem Cells Using Southern Blotting and Polymerase Chain Reaction
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Super-ARMS: A new method for plasma ESR1 mutation detection.

Yinxi Chen1, Xixi Zhao1, Li Wang1

  • 1Department of Oncology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, PR China.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|May 28, 2021
PubMed
Summary
This summary is machine-generated.

A new Super-ARMS method effectively detects ESR1 mutations in plasma circulating tumor DNA (ctDNA) for breast cancer patients. This highly sensitive and cost-effective approach aids in monitoring treatment resistance and guiding therapy decisions.

Keywords:
ARMS-PCRBreast cancerCtDNADDPCRESR1Super-ARMS

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Area of Science:

  • Oncology
  • Molecular Diagnostics
  • Genetics

Background:

  • Estrogen receptor 1 (ESR1) mutations are key drivers of resistance to aromatase inhibitor (AI) therapy and recurrence in hormone receptor-positive breast cancer.
  • Identifying ESR1 mutations is crucial as patients may still respond to treatments like fulvestrant.

Purpose of the Study:

  • To develop a highly sensitive and cost-effective method for detecting ESR1 mutations in plasma circulating tumor DNA (ctDNA).
  • To improve upon existing ARMS-PCR techniques for clinical application in breast cancer management.

Main Methods:

  • Design of novel primers for ESR1 mutation detection.
  • Validation of sensitivity and specificity using standard samples.
  • Performance analysis of the Super-ARMS method in plasma ctDNA from 207 breast cancer patients.

Main Results:

  • The mutation rate was 27.9% in metastatic breast cancer (MBC) patients undergoing AI treatment.
  • A lower mutation rate of 2.97% was observed in primary breast cancer (PBC) patients on AI therapy.
  • Super-ARMS demonstrated comparable performance to the digital droplet PCR (ddPCR) method.

Conclusions:

  • Super-ARMS offers a sensitive and affordable method for plasma ctDNA ESR1 mutation detection, similar to ddPCR but with ARMS-PCR's convenience.
  • This method presents significant advantages over next-generation sequencing (NGS) and ddPCR for clinical promotion.