Comparison between two amplicon-based sequencing panels of different scales in the detection of somatic mutations associated with gastric cancer.

Abstract:

BACKGROUND:Sequencing data from The Cancer Genome Atlas (TGCA), the International Cancer Genome Consortium and other research institutes have revealed the presence of genetic alterations in several tumor types, including gastric cancer. These data have been combined into a catalog of significantly mutated genes for each cancer type. However, it is unclear to what extent significantly mutated genes need to be examined for detecting genetic alterations in gastric cancer patients. Here, we constructed two custom-made sequencing panels of different scales, the Selective hotspot Panel and the Comprehensive Panel, to analyze genetic alterations in 21 resected specimens endoscopically obtained from 20 gastric cancer patients, and we assessed how many mutations were detectable using these different panels. RESULTS:A total of 21 somatic mutations were identified by the Selective hotspot Panel and 70 mutations were detected by the Comprehensive Panel. All mutations identified by the Selective hotspot Panel were detected by the Comprehensive Panel, with high concordant values of the variant allelic fraction of each mutation (correlation coefficient, R = 0.92). At least one mutation was identified in 13 patients (65 %) by the Selective hotspot Panel, whereas the Comprehensive Panel detected mutations in 19 (95 %) patients. Library preparation and sequencing costs were comparable between the two panels. CONCLUSIONS:Our results indicate the utility of comprehensive panel-based targeted sequencing in gastric cancer.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Hirotsu Y,Kojima Y,Okimoto K,Amemiya K,Mochizuki H,Omata M

doi

10.1186/s12864-016-3166-4

subject

Has Abstract

pub_date

2016-10-26 00:00:00

pages

833

issue

1

issn

1471-2164

pii

10.1186/s12864-016-3166-4

journal_volume

17

pub_type

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