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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Payne, Deborah A. / Schlattmann, Peter / Tate, Jillian R.

12 Issues per year


IMPACT FACTOR 2016: 3.432

CiteScore 2016: 2.21

SCImago Journal Rank (SJR) 2016: 1.000
Source Normalized Impact per Paper (SNIP) 2016: 1.112

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1437-4331
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Volume 54, Issue 5 (May 2016)

Issues

Effective quality management practices in routine clinical next-generation sequencing

Francine B. de Abreu
  • Department of Pathology, Dartmouth Hitchcock Medical Center and Norris Cotton Cancer Center, Lebanon, NH, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Jason D. Peterson
  • Department of Pathology, Dartmouth Hitchcock Medical Center and Norris Cotton Cancer Center, Lebanon, NH, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Christopher I. Amos
  • Center for Genomic Medicine and Department of Community and Family Medicine, Giesel School of Medicine at Dartmouth, Hanover, NH, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Wendy A. Wells
  • Department of Pathology, Dartmouth Hitchcock Medical Center and Norris Cotton Cancer Center, Lebanon, NH, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Gregory J. Tsongalis
  • Corresponding author
  • Department of Pathology, Dartmouth Hitchcock Medical Center and Norris Cotton Cancer Center, Lebanon, NH, USA
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2016-02-12 | DOI: https://doi.org/10.1515/cclm-2015-1190

Abstract

Background:

Molecular technologies have allowed laboratories to detect and establish the profiles of human cancers by identifying a variety of somatic variants. In order to improve personalized patient care, we have established a next-generation sequencing (NGS) test to screen for somatic variants in primary or advanced cancers. In this study, we describe the laboratory quality management program for NGS testing, and also provide an overview of the somatic variants identified in over 1000 patient samples as well as their implications in clinical practice.

Methods:

Over the past one-and-a-half years, our laboratory received a total of 1028 formalin-fixed, paraffin-embedded (FFPE) tumor tissues, which consisted of non-small-cell lung carcinomas (NSCLCs), colon adenocarcinomas, glioma/glioblastomas, melanomas, breast carcinomas, and other tumor types. During this time period, we implemented a series of quality control (QC) checks that included (1) pre-DNA extraction, (2) DNA quantification, (3) DNA quality, (4) library quantification, (5) post-emulsification PCR, and (6) post-sequencing metrics. At least 10 ng of genomic DNA (gDNA) were used to prepare barcoded libraries using the AmpliSeq CHPv2. Samples were multiplexed and sequenced on Ion Torrent 318 chips using the Ion PGM System. Variants were identified using the Variant Caller Plugin, and annotation and functional predictions were performed using the Golden Helix SVS.

Results:

A total of 1005 samples passed QC1–3, and following additional library preparation QC checkpoints, 877 samples were sequenced. Samples were classified into two categories: wild-type (127) and positive for somatic variants (750). Somatic variants were classified into clinically actionable (60%) and non-actionable (40%).

Conclusions:

The use of NGS in routine clinical laboratory practice allowed for the detection of tumor profiles that are essential for the selection of targeted therapies and identification of applicable clinical trials, contributing to the improvement of personalized patient care in oncology.

Keywords: massively parallel sequencing; next-generation sequencing; solid tumor; somatic variant

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About the article

Corresponding author: Gregory J. Tsongalis, PhD, Department of Pathology, Dartmouth Hitchcock Medical Center, 1 Medical Center Drive, Lebanon, NH 03756, USA, Phone: +1-603-650-5498, E-mail:


Received: 2015-11-30

Accepted: 2016-01-14

Published Online: 2016-02-12

Published in Print: 2016-05-01


Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

Research funding: None declared.

Employment or leadership: None declared.

Honorarium: None declared.

Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.


Citation Information: Clinical Chemistry and Laboratory Medicine (CCLM), ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: https://doi.org/10.1515/cclm-2015-1190.

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