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Application of a multi-gene next-generation sequencing panel to a non-invasive oesophageal cell-sampling device to diagnose dysplastic Barrett's oesophagus
| Content Provider | Scilit |
|---|---|
| Author | O'Donovan, Maria Katz-Summercorn, Annalise Anand, Shubha Ingledew, Sophie Huang, Yuanxue Roberts, Thomas Galeano-Dalmau, Nuria Liu, Hongxiang Fitzgerald, Rebecca C. |
| Copyright Year | 2017 |
| Description | Journal: The Journal of Pathology: Clinical Research The early detection and endoscopic treatment of patients with the dysplastic stage of Barrett's oesophagus is a key to preventing progression to oesophageal adenocarcinoma. However, endoscopic surveillance protocols are hampered by the invasiveness of repeat endoscopy, sampling bias, and a subjective histopathological diagnosis of dysplasia. In this case‐control study, we investigated the use of a non‐invasive, pan‐oesophageal cell‐sampling device, the Cytosponge™, coupled with a cancer hot‐spot panel to identify patients with dysplastic Barrett's oesophagus. Formalin‐fixed, paraffin‐embedded (FFPE) Cytosponge™ samples from 31 patients with non‐dysplastic and 28 with dysplastic Barrett's oesophagus with good available clinical annotation were selected for inclusion. Samples were microdissected and amplicon sequencing performed using a panel covering >2800 COSMIC hot‐spot mutations in 50 oncogenes and tumour suppressor genes. Strict mutation criteria were determined and duplicates were run to confirm any mutations with an allele frequency <12%. When compared with endoscopy and biopsy as the gold standard the panel achieved a 71.4% sensitivity (95% CI 51.3–86.8) and 90.3% (95% CI 74.3–98.0) specificity for diagnosing dysplasia. TP53 had the highest rate of mutation in 14/28 dysplastic samples (50%). CDKN2A was mutated in 6/28 (21.4%), ERBB2 in 3/28 (10.7%), and 5 other genes at lower frequency. The only gene from this panel found to be mutated in the non‐dysplastic cases was CDKN2A in 3/31 cases (9.7%) in keeping with its known loss early in the natural history of the disease. Hence, it is possible to apply a multi‐gene cancer hot‐spot panel and next‐generation sequencing to microdissected, FFPE samples collected by the Cytosponge™, in order to distinguish non‐dysplastic from dysplastic Barrett's oesophagus. Further work is required to maximize the panel sensitivity. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5653927/pdf |
| Ending Page | 267 |
| Page Count | 10 |
| Starting Page | 258 |
| e-ISSN | 20564538 |
| DOI | 10.1002/cjp2.80 |
| Journal | The Journal of Pathology: Clinical Research |
| Issue Number | 4 |
| Volume Number | 3 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2017-08-24 |
| Access Restriction | Open |
| Subject Keyword | Journal: The Journal of Pathology: Clinical Research Barrett's Oesophagus Oesophageal Adenocarcinoma |
| Content Type | Text |
| Resource Type | Article |
