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Ultra-Fast Amplicon-Based Next-Generation Sequencing in Non-Squamous Non-Small Cell Lung Cancer
In This Article
Summary
The increase of molecular biomarkers to be tested for non-squamous non-small cell lung cancer (NS-NSCLC) care management has prompted the development of fast and reliable molecular detection methods. We describe a workflow for genomic alteration assessment for NS-NSCLC patients using an ultra-fast-next generation sequencing (NGS) approach.
Abstract
The number of molecular alterations to be tested for targeted therapy of non-squamous non-small cell lung cancer (NS-NSCLC) patients has significantly increased these last few years. The detection of molecular abnormalities is mandatory for the optimal care of advanced or metastatic NS-NSCLC patients, allowing targeted therapies to be administrated with an improvement in overall survival. Nevertheless, these tumors develop mechanisms of resistance that are potentially targetable using novel therapies. Some molecular alterations can also modulate the treatment response. The molecular characterization of NS-NSCLC has to be performed in a short turnaround time (TAT), in less than 10 working days, as recommended by the international guidelines. In addition, the origin of the tissue biopsies for genomic analysis is diverse, and their size is continuously decreasing with the development of less invasive methods and protocols. Consequently, pathologists are being challenged to perform effective molecular technics while maintaining an efficient and rapid diagnosis strategy. Here, we describe the ultra-fast amplicon-based next-generation sequencing (NGS) workflow used in daily routine practice at diagnosis for NS-NSCLC patients. We showed that this system is able to identify the current molecular targets used in precision medicine in thoracic oncology in an appropriate TAT.
Introduction
Over the last decade, the development of targeted and immuno-therapies has significantly increased the overall survival (OS) of non-squamous non-small cell lung cancer (NS-NSCLC)1,2. In this regard, the ,number of mandatory genes and molecular targets to analyze when treating NS-NSCLC has increased over the last few years3,4.
Current international guidelines recommend testing EGFR, ALK, ROS1, BRAF, NTRK, RET, and MET at diagnosis of advanced NS-NSCLC
Protocol
All procedures have been approved by the local ethics committee (Human Research Ethics Committee, Centre Hospitalier Universitaire de Nice, Tumorothèque BB-0033-00025). Informed consent was obtained from all patients to use samples and generated data. All samples were obtained from patients diagnosed with NS-NSCLC in LPCE (Nice, France) between 20 September and 31 January 2022 as part of the medical care.
1. Preparation of FFPE DNA and RNA samples using automated purification instru.......
Representative Results
Using the procedure presented here, described in detail in our recent publications21, we developed an optimal workflow for the assessment of molecular alteration as a reflex testing in routinely performed clinical practice for diagnosis in patients with NS-NSCLC using an ultra-fast amplicon-based next-generation sequencing approach. The molecular workflow of the method is shown in Figure 1. The list of genes included in the panel is shown in Supplementary Figu.......
Discussion
The development of an ultra-fast amplicon-based NGS approach as reflex testing for molecular alteration assessment at diagnosis of any stage NS-NSLC is an optimal option for the detection of all guideline-recommended and emerging biomarkers in NS-NSCLC5,22,23. While sequential methods (IHC, PCR, FISH) focus only on specific genes and can result in tissue material exhaustion, this NGS workflow allows a specific and sensitive eval.......
Acknowledgements
We thank Thermo Fisher Scientific for giving us the possibility to use their device and materials.
....Materials
| Name | Company | Catalog Number | Comments |
| 96 well hard shell plate clear | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | 4483354 | |
| Adhesive PCR Plate Foil | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | AB0626 | |
| AutoLys M tube | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A38738 | FFPE sample processing tubes |
| Genexus Barcodes 1-32 HD | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A40261 | |
| Genexus GX5 Chip and Genexus Coupler | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A40269 | |
| Genexus Pipette Tips | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A40266 | |
| Genexus Purification Instrument | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A48148 | Automated purification instrument (API) |
| Genexus Sequencing Kit | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A40271 | |
| Genexus Templating Strips 3-GX5 and 4 | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A40263 | |
| Genexus Integrated Sequencer | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A45727 | |
| Ion Torrent Genexus FFPE DNA/RNA Purification Combo Kit | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A45539 | |
| Oncomine Precision Assay GX (OPA) Panel (included Strips 1 and 2-HD) | Thermo Fisher Scientific (Waltham, Massachusetts, USA) | A46291 |
References
- Howlader, N., et al. The effect of advances in lung-cancer treatment on population mortality. New England Journal of Medicine. 383 (7), 640-649 (2020).
- Melosky, B., et al. The rapidly....
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