LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Performance evaluation of the Biocartis Idylla EGFR Mutation Test using pre-extracted DNA from a cohort of highly characterised mutation positive samples

Photo by nci from unsplash

Aims Targeted therapies for non-small cell lung carcinoma (NSCLC) rely on the detection of specific genomic lesions, such as mutations within the epidermal growth factor receptor (EGFR) gene. The Biocartis… Click to show full abstract

Aims Targeted therapies for non-small cell lung carcinoma (NSCLC) rely on the detection of specific genomic lesions, such as mutations within the epidermal growth factor receptor (EGFR) gene. The Biocartis Idylla platform and single-use EGFR mutation test cartridge is CE-IVD for use with formalin-fixed paraffin embedded (FFPE) tumour material, but can also function off-scope using extracted DNA as input material. This can expand the utility of the platform and potentially conserve valuable tissue. Methods We sought to evaluate the performance of this system to detect known EGFR mutations using extracted DNA at different input levels. 130 next generation sequencing-characterised NSCLC cases possessing EGFR mutations that were theoretically detectable by the Idylla system were selected. Replicate analyses were performed using the Idylla EGFR test with up to three different DNA input levels (20 ng, 50 ng and 250 ng). Results Considering only variants within the test manufacturer’s specified scope, the Idylla EGFR test generated concordant findings for 90.77% of cases at 20 ng DNA input, 98.46% at 50 ng input and 100% at 250 ng input. Analyses with discordant findings all generated control quantification cycle (CQ) values greater than 23. Very low CQ values were associated with EGFR gene amplification. Conclusions The Idylla EGFR Mutation Test can be used at least as well with pre-extracted DNA than with direct FFPE input. In cases with control CQ >23, reanalysis with an increased DNA input should ideally be undertaken. If this is not possible, the risk of false negative calls may be mitigated by manual review of the quantitative PCR data and/or by reflexing to alternative analysis options.

Keywords: extracted dna; input; idylla egfr; test; mutation

Journal Title: Journal of Clinical Pathology
Year Published: 2021

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.