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Fujii T, Takeda M, Uchiyama T, Nitta Y, Maebou K, Terada C, Okada F, Matsuoka M, Sugimoto S, Sasaki S, Morita K, Itami H, Miyake M, Takeda M, Sawabata N, Fujimoto K, Ohbayashi C. Identification of fusion transcripts in sarcoma from archival formalin-fixed paraffin-embedded tissues: A next-generation sequencing approach. Pathol Int 2022; 72:444-456. [PMID: 35975909 DOI: 10.1111/pin.13265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 07/21/2022] [Indexed: 11/30/2022]
Abstract
Most sarcomas are highly aggressive, and cause necrosis and hemorrhage. The diagnosis of sarcoma is challenging because of the lack of specificity of immunohistochemical staining; however, molecular biological approaches, such as genetic mutation, chromosomal translocation, and gene amplification, are promising. In this study, we extracted RNA from formalin-fixed paraffin-embedded (FFPE) tissue derived from surgically resected specimens of sarcoma stored for various periods and performed next-generation sequencing (NGS) analysis by MiniSeq using the Archer Fusion-Plex Sarcoma Panel. RNA was extracted from 63 FFPE tissue samples, and the degree of RNA degradation was assessed. The number of reads and fragment lengths were evaluated by NGS analysis. RNA extraction and cDNA synthesis were successful in 56 cases and library preparation was possible. Fusion genes were detected in 16 of 63 archived FFPE tissue samples in this study. However, in 18 cases, fragmentation was strong, and high-quality libraries could not be obtained. Nevertheless, comprehensive analysis of fusion genes with high sequence specificity by NGS can be a powerful alternative to reverse transcription-polymerase chain reaction and fluorescence in situ hybridization methods.
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Affiliation(s)
- Tomomi Fujii
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Maiko Takeda
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Tomoko Uchiyama
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Yuji Nitta
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Katsuya Maebou
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Chiyoko Terada
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Fumi Okada
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Minami Matsuoka
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Sumire Sugimoto
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Shoh Sasaki
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Kohei Morita
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Hiroe Itami
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
| | - Makito Miyake
- Department of Urology, Nara Medical University School of Medicine, Nara, Japan
| | - Masayuki Takeda
- Department of Cancer Genomics and Medical Oncology, Nara Medical University School of Medicine, Nara, Japan
| | - Noriyoshi Sawabata
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University School of Medicine, Nara, Japan
| | - Kiyohide Fujimoto
- Department of Urology, Nara Medical University School of Medicine, Nara, Japan
| | - Chiho Ohbayashi
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Nara, Japan
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