Comparing PCR Methods for Detecting PIK3CA Mutations in Breast Cancer
Author Information
Author(s): Smilkou Stavroula, Kaklamanis Loukas, Balgouranidou Ioanna, Linardou Helena, Papatheodoridi Alkistis Maria, Zagouri Flora, Razis Evangelia, Kakolyris Stylianos, Psyrri Amanda, Papadimitriou Christos, Markou Athina, Lianidou Evi
Primary Institution: University of Athens, Athens, Greece
Hypothesis
The study aims to compare the efficacy of an ultrasensitive real-time PCR assay with droplet digital PCR for detecting PIK3CA hotspot mutations.
Conclusion
The ultrasensitive real-time PCR assay provides accurate detection of PIK3CA hotspot mutations in liquid biopsy samples, yielding results similar to ddPCR.
Supporting Evidence
- The ultrasensitive real-time PCR detected PIK3CA mutations in 52.4% of primary tumor samples.
- Concordance rates between the two methods were high for most mutations.
- CTC-derived gDNA showed higher mutation detection rates compared to plasma-cfDNA.
Takeaway
Researchers tested two methods to find cancer mutations in blood samples, and found that a cheaper method worked just as well as a more expensive one.
Methodology
The study analyzed 42 gDNAs from primary tumors, 29 plasma-cfDNA samples, and 29 paired CTC-derived gDNAs using both ultrasensitive real-time PCR and ddPCR.
Limitations
The limited number of clinical samples and healthy controls restricts the conclusions made.
Participant Demographics
Patients with ER+ metastatic breast cancer and 10 healthy donors.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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