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Sakka S, Kandori S, Kawai K, Kojima T, Nitta S, Chihara I, Nagumo Y, Kawahara T, Mathis BJ, Ishihara M, Shinohara N, Kishida T, Ukimura O, Nishimura K, Kobayashi Y, Nishiyama H. Plasma circulating tumor DNA profiling in patients with chemo-refractory germ cell tumors. Int J Urol 2023; 30:456-462. [PMID: 36746673 DOI: 10.1111/iju.15155] [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: 06/07/2022] [Accepted: 01/17/2023] [Indexed: 02/08/2023]
Abstract
OBJECTIVES Molecular analysis of tumor tissues has been extensively analyzed in germ cell tumors. However, genetic analysis of plasma circulating tumor DNA has been limited. Our objective was to analyze genetic alterations in circulating tumor DNA as well as its impact on prognosis in patients with chemo-refractory germ cell tumors. METHODS We included 13 patients with chemo-refractory germ cell tumors who relapsed after second-line or higher previous chemotherapy and performed targeted sequencing of plasma cell-free DNA using an AVENIO Expanded kit. RESULTS Tumor-specific genetic alterations were identified in all patients. The most frequently mutated gene was TP53 (53.4%), followed by PTEN (23.1%), GNAS (15.4%) and MTOR (15.4%). Moreover, EGFR amplification (38.5%) and MET amplification (15.4%) were also identified. We defined two or more single nucleotide variants detected in plasma cell-free DNA as circulating tumor DNA-positive. Kaplan-Meier analysis revealed that overall survival was significantly shorter in circulating tumor DNA-positive patients than circulating tumor DNA negative-patients (median overall survival 3.13 vs. 8.73 months; p = 0.042). CONCLUSION Analysis of plasma circulating tumor DNA could detect genetic alterations in patients with chemo-refractory GCT. Moreover, detectable circulating tumor DNA in plasma was associated with poor prognosis in those patients. These results suggest that liquid biopsy using analysis of plasma circulating tumor DNA may be clinically useful for germ cell tumor patients.
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Affiliation(s)
- Shotaro Sakka
- Department of Urology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Shuya Kandori
- Department of Urology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Koji Kawai
- Department of Urology, International University of Health and Welfare, Narita, Chiba, Japan
| | - Takahiro Kojima
- Department of Urology, Aichi Cancer Center Hospital, Nagoya, Aichi, Japan
| | - Satoshi Nitta
- Department of Urology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Ichiro Chihara
- Department of Urology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yoshiyuki Nagumo
- Department of Urology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Takashi Kawahara
- Department of Urology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Bryan J Mathis
- International Medical Center, University of Tsukuba Affiliated Hospital, Ibaraki, Japan
| | - Megumi Ishihara
- Tsukuba Clinical Research and Development Organization (T-CReDO), University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Nobuo Shinohara
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Takeshi Kishida
- Department of Urology, Kanagawa Cancer Center, Yokohama, Japan
| | - Osamu Ukimura
- Department of Urology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuo Nishimura
- Department of Urology, Osaka International Cancer Institute, Chuo-ku, Osaka, Japan
| | - Yasuyuki Kobayashi
- Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Talukdar FR, Abramović I, Cuenin C, Carreira C, Gangane N, Sincic N, Herceg Z. A protocol for good quality genomic DNA isolation from formalin-fixed paraffin-embedded tissues without using commercial kits. Mol Biol Rep 2022; 49:4115-4121. [PMID: 35359238 DOI: 10.1007/s11033-022-07394-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 03/16/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND DNA isolation from formalin-fixed paraffin-embedded (FFPE) tissues for molecular analysis has become a frequent procedure in cancer research. However, the yield or quality of the isolated DNA is often compromised, and commercial kits are used to overcome this to some extent. METHODS We developed a new protocol (IARCp) to improve the quality and yield of DNA from FFPE tissues without using any commercial kit. To evaluate the IARCp's performance, we compared the quality and yield of DNA with two commercial kits, namely NucleoSpin® DNA FFPE XS (MN) and QIAamp DNA Micro (QG) isolation kit. RESULTS Total DNA yield for QG ranged from 120.0 to 282.0 ng (mean 216.5 ng), for MN: 213.6-394.2 ng (mean 319.1 ng), and with IARCp the yield was much higher ranging from 775.5 to 1896.9 ng (mean 1517.8 ng). Moreover, IARCp has also performed well in qualitative assessments by spectrophotometer, fluorometer, and real-time PCR assay. CONCLUSION Overall, IARCp represents a novel approach to DNA isolation from FFPE which results in good quality and significant amounts of DNA suitable for many downstream genome-wide and targeted molecular analyses. This protocol does not require the use of any commercial kits or phenol for isolating DNA from FFPE tissues, making it suitable to implement in low-resource settings such as low and middle-income countries.
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Affiliation(s)
- Fazlur Rahman Talukdar
- International Agency for Research on Cancer (IARC), 150 Cours Albert-Thomas, 69008, Lyon Cedex 08, France.
| | - Irena Abramović
- Scientific Group for Research on Epigenetic Biomarkers, School of Medicine, University of Zagreb, Zagreb, Croatia
- Centre of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, Zagreb, Croatia
- Department of Medical Biology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Cyrille Cuenin
- International Agency for Research on Cancer (IARC), 150 Cours Albert-Thomas, 69008, Lyon Cedex 08, France
| | - Christine Carreira
- International Agency for Research on Cancer (IARC), 150 Cours Albert-Thomas, 69008, Lyon Cedex 08, France
| | - Nitin Gangane
- Mahatma Gandhi Institute of Medical Sciences, Sevagram, India
| | - Nino Sincic
- Scientific Group for Research on Epigenetic Biomarkers, School of Medicine, University of Zagreb, Zagreb, Croatia
- Centre of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, Zagreb, Croatia
- Department of Medical Biology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Zdenko Herceg
- International Agency for Research on Cancer (IARC), 150 Cours Albert-Thomas, 69008, Lyon Cedex 08, France
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