Histopathological factors affecting the extraction of high quality genomic DNA from tissue sections for next‑generation sequencing
Year: 2019
Type: article
Abstract: To enable the widespread application of genomic medicine, the extraction of genomic DNA from thin sections of archived formalin-fixed and paraffin-embedded (FFPE) tissue blocks for next-generation sequencing (NGS) is often necessary. However, there are currently no guidelines available on which specific regions of the microtome sections to use for macrodissection with respect to the histopathological factors observed under microscopic examination. The aim of this study was to clarify the relationship between histopathological factors and DNA quality, and to standardize the macrodissection method for more efficient implementation of NGS. FFPE tissue specimens of 218 patients from the Biomarker Research for Anti-EGFR Monoclonal Antibodies by Comprehensive Cancer Genomics study were used to investigate the relationship between 15 histopathological factors and the quantitative ratio of double-stranded DNA (dsDNA) to total nucleic acids, as well as the ∆ crossing point value of each tissue specimen. Multivariate logistic regression analysis revealed that specimen storage of ≥3 years was negatively associated with dsDNA quality (P=0.0007, OR: 4.30, 95% CI: 1.85-10.04). In contrast, the presence of a mucus pool was positively associated with dsDNA quality (P=0.0308, OR: 0.23, 95% CI: 0.06-0.87). Metastatic tumors and longer specimen storage periods were significantly associated with lower ∆Cp values (P=0.0007, OR: 4.43, 95% CI: 1.87-10.49; and P=0.0003, OR: 5.51, 95% CI: 2.18-13.95, respectively). Therefore, macrodissection should not be performed on specimens exhibiting histopathological factors associated with poor DNA quality. In particular, the use of tissue blocks with a storage period of <3 years allows the extraction of genomic DNA suitable for NGS.
Source: Biomedical Reports
DOI: 10.3892/br.2019.1235
Authors: Satoshi Fujii, Takayuki Yoshino, Kentaro Yamazaki, Kei Muro, Kensei Yamaguchi, Tomohiro Nishina, Satoshi Yuki, Eiji Shinozaki, Kohei Shitara, Hideaki Bando, Sachiyo Mimaki, Chikako Nakai, Koutatsu Matsushima, Yutaka Suzuki, Kiwamu Akagi, Takeharu Yamanaka, Shogo Nomura, Hiroyasu Esumi, Masaya Sugiyama, Nao Nishida, Masashi Mizokami, Yasuhiro Koh, Yukiko Abe, Atsushi Ohtsu, Katsuya Tsuchihara
Institutions: National Cancer Center Exploratory Oncology Research & Clinical Trial Center, National Cancer Center Hospital East, Shizuoka Cancer Center, Aichi Cancer Center, Aichi Cancer Center Hospital, The Cancer Institute Hospital, Japanese Foundation For Cancer Research, Shikoku Cancer Center, Hokkaido University Hospital, G&G Science Co., Ltd. (Japan), The University of Tokyo, Saitama Cancer Center, Yokohama City University, Research Institute for Biomedical Sciences, Tokyo University of Science, National Center for Global Health and Medicine, Wakayama Medical University
Language: English
Subfield: Cancer Research
Domain: Life Sciences
Open Access status: diamond
OpenAlex ID: W2969973799