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Effects of empagliflozin on progression of chronic kidney disease: a prespecified secondary analysis from the empa-kidney trial. Lancet Diabetes Endocrinol 2024; 12:39-50. [PMID: 38061371 PMCID: PMC7615591 DOI: 10.1016/s2213-8587(23)00321-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Sodium-glucose co-transporter-2 (SGLT2) inhibitors reduce progression of chronic kidney disease and the risk of cardiovascular morbidity and mortality in a wide range of patients. However, their effects on kidney disease progression in some patients with chronic kidney disease are unclear because few clinical kidney outcomes occurred among such patients in the completed trials. In particular, some guidelines stratify their level of recommendation about who should be treated with SGLT2 inhibitors based on diabetes status and albuminuria. We aimed to assess the effects of empagliflozin on progression of chronic kidney disease both overall and among specific types of participants in the EMPA-KIDNEY trial. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA), and included individuals aged 18 years or older with an estimated glomerular filtration rate (eGFR) of 20 to less than 45 mL/min per 1·73 m2, or with an eGFR of 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher. We explored the effects of 10 mg oral empagliflozin once daily versus placebo on the annualised rate of change in estimated glomerular filtration rate (eGFR slope), a tertiary outcome. We studied the acute slope (from randomisation to 2 months) and chronic slope (from 2 months onwards) separately, using shared parameter models to estimate the latter. Analyses were done in all randomly assigned participants by intention to treat. EMPA-KIDNEY is registered at ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and then followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroups of eGFR included 2282 (34·5%) participants with an eGFR of less than 30 mL/min per 1·73 m2, 2928 (44·3%) with an eGFR of 30 to less than 45 mL/min per 1·73 m2, and 1399 (21·2%) with an eGFR 45 mL/min per 1·73 m2 or higher. Prespecified subgroups of uACR included 1328 (20·1%) with a uACR of less than 30 mg/g, 1864 (28·2%) with a uACR of 30 to 300 mg/g, and 3417 (51·7%) with a uACR of more than 300 mg/g. Overall, allocation to empagliflozin caused an acute 2·12 mL/min per 1·73 m2 (95% CI 1·83-2·41) reduction in eGFR, equivalent to a 6% (5-6) dip in the first 2 months. After this, it halved the chronic slope from -2·75 to -1·37 mL/min per 1·73 m2 per year (relative difference 50%, 95% CI 42-58). The absolute and relative benefits of empagliflozin on the magnitude of the chronic slope varied significantly depending on diabetes status and baseline levels of eGFR and uACR. In particular, the absolute difference in chronic slopes was lower in patients with lower baseline uACR, but because this group progressed more slowly than those with higher uACR, this translated to a larger relative difference in chronic slopes in this group (86% [36-136] reduction in the chronic slope among those with baseline uACR <30 mg/g compared with a 29% [19-38] reduction for those with baseline uACR ≥2000 mg/g; ptrend<0·0001). INTERPRETATION Empagliflozin slowed the rate of progression of chronic kidney disease among all types of participant in the EMPA-KIDNEY trial, including those with little albuminuria. Albuminuria alone should not be used to determine whether to treat with an SGLT2 inhibitor. FUNDING Boehringer Ingelheim and Eli Lilly.
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Yamada N, Yamagata K, Yamaguchi M, Yamaji Y, Yamamoto A, Yamamoto S, Yamamoto S, Yamamoto T, Yamanaka A, Yamano T, Yamanouchi Y, Yamasaki N, Yamasaki Y, Yamasaki Y, Yamashita C, Yamauchi T, Yan Q, Yanagisawa E, Yang F, Yang L, Yano S, Yao S, Yao Y, Yarlagadda S, Yasuda Y, Yiu V, Yokoyama T, Yoshida S, Yoshidome E, Yoshikawa H, Young A, Young T, Yousif V, Yu H, Yu Y, Yuasa K, Yusof N, Zalunardo N, Zander B, Zani R, Zappulo F, Zayed M, Zemann B, Zettergren P, Zhang H, Zhang L, Zhang L, Zhang N, Zhang X, Zhao J, Zhao L, Zhao S, Zhao Z, Zhong H, Zhou N, Zhou S, Zhu D, Zhu L, Zhu S, Zietz M, Zippo M, Zirino F, Zulkipli FH. Impact of primary kidney disease on the effects of empagliflozin in patients with chronic kidney disease: secondary analyses of the EMPA-KIDNEY trial. Lancet Diabetes Endocrinol 2024; 12:51-60. [PMID: 38061372 DOI: 10.1016/s2213-8587(23)00322-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND The EMPA-KIDNEY trial showed that empagliflozin reduced the risk of the primary composite outcome of kidney disease progression or cardiovascular death in patients with chronic kidney disease mainly through slowing progression. We aimed to assess how effects of empagliflozin might differ by primary kidney disease across its broad population. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA). Patients were eligible if their estimated glomerular filtration rate (eGFR) was 20 to less than 45 mL/min per 1·73 m2, or 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher at screening. They were randomly assigned (1:1) to 10 mg oral empagliflozin once daily or matching placebo. Effects on kidney disease progression (defined as a sustained ≥40% eGFR decline from randomisation, end-stage kidney disease, a sustained eGFR below 10 mL/min per 1·73 m2, or death from kidney failure) were assessed using prespecified Cox models, and eGFR slope analyses used shared parameter models. Subgroup comparisons were performed by including relevant interaction terms in models. EMPA-KIDNEY is registered with ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroupings by primary kidney disease included 2057 (31·1%) participants with diabetic kidney disease, 1669 (25·3%) with glomerular disease, 1445 (21·9%) with hypertensive or renovascular disease, and 1438 (21·8%) with other or unknown causes. Kidney disease progression occurred in 384 (11·6%) of 3304 patients in the empagliflozin group and 504 (15·2%) of 3305 patients in the placebo group (hazard ratio 0·71 [95% CI 0·62-0·81]), with no evidence that the relative effect size varied significantly by primary kidney disease (pheterogeneity=0·62). The between-group difference in chronic eGFR slopes (ie, from 2 months to final follow-up) was 1·37 mL/min per 1·73 m2 per year (95% CI 1·16-1·59), representing a 50% (42-58) reduction in the rate of chronic eGFR decline. This relative effect of empagliflozin on chronic eGFR slope was similar in analyses by different primary kidney diseases, including in explorations by type of glomerular disease and diabetes (p values for heterogeneity all >0·1). INTERPRETATION In a broad range of patients with chronic kidney disease at risk of progression, including a wide range of non-diabetic causes of chronic kidney disease, empagliflozin reduced risk of kidney disease progression. Relative effect sizes were broadly similar irrespective of the cause of primary kidney disease, suggesting that SGLT2 inhibitors should be part of a standard of care to minimise risk of kidney failure in chronic kidney disease. FUNDING Boehringer Ingelheim, Eli Lilly, and UK Medical Research Council.
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Matsushita K, Kobayashi S, Akita H, Konno M, Asai A, Noda T, Iwagami Y, Asaoka T, Gotoh K, Mori M, Doki Y, Eguchi H, Ishii H. Clinicopathological significance of MYL9 expression in pancreatic ductal adenocarcinoma. Cancer Rep (Hoboken) 2022; 5:e1582. [PMID: 34821071 PMCID: PMC9575502 DOI: 10.1002/cnr2.1582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/31/2021] [Accepted: 10/12/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Pancreatic ductal adenocarcinoma is one of the most aggressive malignancies, and often involves invasion and distant metastasis from the early tumor stages. Myosin II reportedly plays a key role in regulating tumor progression and metastasis. AIMS We examined whether myosin regulatory light polypeptide 9 (MYL9) regulates cancer cell proliferation. METHODS AND RESULTS To investigate the expression pattern and clinical significance of MYL9 in pancreatic ductal adenocarcinoma, we performed immunohistochemical analysis of samples collected from 101 patients with pancreatic ductal adenocarcinoma. The expression of MYL9 was investigated to evaluate its functional role and contribution to proliferation and apoptosis in pancreatic ductal adenocarcinoma cells in vitro. The results showed that MYL9 was predominantly expressed in the cytoplasm and membrane of pancreatic ductal adenocarcinoma cells. Multivariate analysis indicated that MYL9 acted as an independent prognostic factor for overall survival and distant metastasis-free survival. MYL9 expression was strongly associated with malignancy in in vitro analyses, including proliferation and anti-apoptotic activities. CONCLUSIONS Our findings suggest that MYL9 is an independent prognostic factor of pancreatic ductal adenocarcinoma. MYL9 is a crucial biomarker and potential therapeutic target for pancreatic ductal adenocarcinoma.
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Affiliation(s)
- Katsunori Matsushita
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
- Center of Medical Innovation and Translational ResearchGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Shogo Kobayashi
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Hirofumi Akita
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Masamitsu Konno
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
- Center of Medical Innovation and Translational ResearchGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Ayumu Asai
- Center of Medical Innovation and Translational ResearchGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
- Artificial Intelligence Research CenterThe Institute of Scientific and Industrial Research, Osaka UniversityIbarakiOsakaJapan
- Institute of Scientific and Industrial ResearchOsaka UniversityIbarakiOsakaJapan
| | - Takehiro Noda
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Yoshifumi Iwagami
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Tadafumi Asaoka
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Kunihito Gotoh
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Masaki Mori
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
- Department of Surgery and ScienceGraduate School of Medical Sciences, Kyushu UniversityFukuokaJapan
| | - Yuichiro Doki
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
- Center of Medical Innovation and Translational ResearchGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Hidetoshi Eguchi
- Department of Gastroenterological SurgeryGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
- Center of Medical Innovation and Translational ResearchGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
| | - Hideshi Ishii
- Center of Medical Innovation and Translational ResearchGraduate School of Medicine, Osaka UniversitySuitaOsakaJapan
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Ohshiro T, Asai A, Konno M, Ohkawa M, Komoto Y, Ofusa K, Ishii H, Taniguchi M. Direct observation of DNA alterations induced by a DNA disruptor. Sci Rep 2022; 12:6945. [PMID: 35484163 PMCID: PMC9050671 DOI: 10.1038/s41598-022-10725-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/30/2022] [Indexed: 12/04/2022] Open
Abstract
DNA alterations, such as base modifications and mutations, are closely related to the activity of transcription factors and the corresponding cell functions; therefore, detection of DNA alterations is important for understanding their relationships. Particularly, DNA alterations caused by exposure to exogenous molecules, such as nucleic acid analogues for cancer therapy and the corresponding changes in cell functions, are of interest in medicine for drug development and diagnosis purposes. However, detection of comprehensive direct evidence for the relationship of DNA modifications/mutations in genes, their effect on transcription factors, and the corresponding cell functions have been limited. In this study, we utilized a single-molecule electrical detection method for the direct observation of DNA alterations on transcription factor binding motifs upon exposure to a nucleic acid analogue, trifluridine (FTD), and evaluated the effects of the DNA alteration on transcriptional activity in cancer cell line cells. We found ~ 10% FTD incorporation at the transcription factor p53 binding regions in cancer cells exposed to FTD for 5 months. Additionally, through single-molecule analysis of p53-enriched DNA, we found that the FTD incorporation at the p53 DNA binding regions led to less binding, likely due to weaken the binding of p53. This work suggests that single-molecule detection of DNA sequence alterations is a useful methodology for understanding DNA sequence alterations.
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Affiliation(s)
- Takahito Ohshiro
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Ayumu Asai
- Artificial Intelligence Research Center, SANKEN (The Institute of Scientific and Industrial Research) Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.,SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Masamitsu Konno
- Center of Medical Innovation and Translation Research, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 560-0085, Japan.,Division of Tumor Biology, Research Institute for Biomedical Sciences (RIBS), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Mayuka Ohkawa
- Division of Tumor Biology, Research Institute for Biomedical Sciences (RIBS), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Yuki Komoto
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.,Artificial Intelligence Research Center, SANKEN (The Institute of Scientific and Industrial Research) Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Ken Ofusa
- Center of Medical Innovation and Translation Research, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 560-0085, Japan.,Prophoenix Division, Food and Life-Science Laboratory, Idea Consultants, Inc., 1-24-22 Nanko-kita, Suminoe-ku, Osaka-City, Osaka, 559-8519, Japan
| | - Hideshi Ishii
- Center of Medical Innovation and Translation Research, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 560-0085, Japan.
| | - Masateru Taniguchi
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
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Asai A, Konno M, Taniguchi M, Vecchione A, Ishii H. Computational healthcare: Present and future perspectives (Review). Exp Ther Med 2021; 22:1351. [PMID: 34659497 PMCID: PMC8515560 DOI: 10.3892/etm.2021.10786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 07/19/2021] [Indexed: 12/05/2022] Open
Abstract
Artificial intelligence (AI) has been developed through repeated new discoveries since around 1960. The use of AI is now becoming widespread within society and our daily lives. AI is also being introduced into healthcare, such as medicine and drug development; however, it is currently biased towards specific domains. The present review traces the history of the development of various AI-based applications in healthcare and compares AI-based healthcare with conventional healthcare to show the future prospects for this type of care. Knowledge of the past and present development of AI-based applications would be useful for the future utilization of novel AI approaches in healthcare.
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Affiliation(s)
- Ayumu Asai
- Center of Medical Innovation and Translational Research, Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Artificial Intelligence Research Center, Osaka University, Ibaraki, Osaka 567-0047, Japan.,The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Masamitsu Konno
- Center of Medical Innovation and Translational Research, Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Andrea Vecchione
- Department of Clinical and Molecular Medicine, University of Rome 'Sapienza', Santo Andrea Hospital, I-1035-00189 Rome, Italy
| | - Hideshi Ishii
- Center of Medical Innovation and Translational Research, Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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Asai A, Konno M, Ozaki M, Kawamoto K, Chijimatsu R, Kondo N, Hirotsu T, Ishii H. Scent test using Caenorhabditis elegans to screen for early-stage pancreatic cancer. Oncotarget 2021; 12:1687-1696. [PMID: 34434497 PMCID: PMC8378769 DOI: 10.18632/oncotarget.28035] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/13/2021] [Indexed: 12/12/2022] Open
Abstract
Although early detection and diagnosis are indispensable for improving the prognosis of patients with pancreatic cancer, both have yet to be achieved. Except for pancreatic cancer, other cancers have already been screened through scent tests using animals or microorganisms, including Caenorhabditis elegans. While such a method may greatly improve the prognosis of pancreatic cancer, no studies have investigated the same, mainly given the difficulty of collecting suitable samples from patients with early-stage pancreatic cancer. In this study, we organized a nationwide study group comprising high-volume centers throughout Japan to collect patients with very-early-stage pancreatic cancer (stage 0 or IA). We initially performed an open-label study involving 83 cases (stage 0–IV), with subsequent results showing significant differences after surgical removal in stage 0–IA (×10 dilution: p < 0.001; ×100 dilution: p < 0.001). Thereafter, a blinded study on 28 cases (11 patients with stage 0 or IA disease and 17 healthy volunteers) was conducted by comparing very-early-stage pancreatic cancer patients with healthy volunteers to determine whether C. elegans could detect the scent of cancer for the diagnosis of early-stage pancreatic cancer. Preoperative urine samples had a significantly higher chemotaxis index compared to postoperative samples in patients with pancreatic cancer [×10 dilution: p < 0.001, area under the receiver operating characteristic curve (AUC) = 0.845; ×100 dilution: p < 0.001, AUC = 0.820] and healthy volunteers (×10 dilution: p = 0.034; ×100 dilution: p = 0.088). Moreover, using the changes in preoperative and postoperative chemotaxis index, this method had a higher sensitivity for detecting early pancreatic cancer compared to existing diagnostic markers. The clinical application C. elegans for the early diagnosis of cancer can certainly be expected in the near future.
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Affiliation(s)
- Ayumu Asai
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Artificial Intelligence Research Center, Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan
| | - Masamitsu Konno
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Present address: Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Miyuki Ozaki
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Koichi Kawamoto
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Present address: Kinnki Regional Bureau of Health and Welfare, Osaka, Japan
| | - Ryota Chijimatsu
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Nobuaki Kondo
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Hirotsu Bio Science Inc., Chiyoda-Ku, Tokyo 102-0094, Japan
| | - Takaaki Hirotsu
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Hirotsu Bio Science Inc., Chiyoda-Ku, Tokyo 102-0094, Japan
| | - Hideshi Ishii
- Center of Medical Innovation and Translational Research (CoMIT), Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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Takeda Y, Kobayashi S, Kitakaze M, Yamada D, Akita H, Asai A, Konno M, Arai T, Kitagawa T, Ofusa K, Yabumoto M, Hirotsu T, Vecchione A, Taniguchi M, Doki Y, Eguchi H, Ishii H. Immuno-Surgical Management of Pancreatic Cancer with Analysis of Cancer Exosomes. Cells 2020; 9:cells9071645. [PMID: 32659892 PMCID: PMC7408222 DOI: 10.3390/cells9071645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/05/2020] [Accepted: 07/05/2020] [Indexed: 02/07/2023] Open
Abstract
Exosomes (EXs), a type of extracellular vesicles secreted from various cells and especially cancer cells, mesenchymal cells, macrophages and other cells in the tumor microenvironment (TME), are involved in biologically malignant behaviors of cancers. Recent studies have revealed that EXs contain microRNAs on their inside and express proteins and glycolipids on their outsides, every component of which plays a role in the transmission of genetic and/or epigenetic information in cell-to-cell communications. It is also known that miRNAs are involved in the signal transduction. Thus, EXs may be useful for monitoring the TME of tumor tissues and the invasion and metastasis, processes that are associated with patient survival. Because several solid tumors secrete immune checkpoint proteins, including programmed cell death-ligand 1, the EX-mediated mechanisms are suggested to be potent targets for monitoring patients. Therefore, a companion therapeutic approach against cancer metastasis to distant organs is proposed when surgical removal of the primary tumor is performed. However, EXs and immune checkpoint mechanisms in pancreatic cancer are not fully understood, we provide an update on the recent advances in this field and evidence that EXs will be useful for maximizing patient benefit in precision medicine.
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Affiliation(s)
- Yu Takeda
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Shogo Kobayashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Masatoshi Kitakaze
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Daisaku Yamada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Hirofumi Akita
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Ayumu Asai
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;
| | - Masamitsu Konno
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Takahiro Arai
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Unitech Co., Ltd., Kashiwa 277-0005, Japan
| | - Toru Kitagawa
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
- Kyowa-kai Medical Corporation, Osaka 540-0008, Japan
| | - Ken Ofusa
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Prophoenix Division, Food and Life-Science Laboratory, Idea Consultants, Inc., Osaka-city, Osaka 559-8519, Japan
| | - Masami Yabumoto
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
- Kinshu-kai Medical Corporation, Osaka 558-0041, Japan
| | - Takaaki Hirotsu
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Hirotsu Bio Science Inc., Tokyo 107-0062, Japan
| | - Andrea Vecchione
- Department of Clinical and Molecular Medicine, University of Rome “Sapienza”, Santo Andrea Hospital, via di Grottarossa, 1035-00189 Rome, Italy;
| | - Masateru Taniguchi
- Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;
| | - Yuichiro Doki
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Hidetoshi Eguchi
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
| | - Hideshi Ishii
- Center of Medical Innovation and Translational Research (CoMIT), Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (Y.T.); (M.K.); (A.A.); (M.K.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (Y.D.); (H.E.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; (S.K.); (D.Y.); (H.A.)
- Correspondence: ; Tel.: +81-(0)6-6210-8406 (ext. 8405); Fax: +81-(0)6-6210-8407
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8
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Asai A, Konno M, Kawamoto K, Isotani A, Mori M, Eguchi H, Doki Y, Arai T, Ishii H. Hereditary pancreatitis model by blastocyst complementation in mouse. Oncotarget 2020; 11:2061-2073. [PMID: 32547704 PMCID: PMC7275788 DOI: 10.18632/oncotarget.27595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 04/03/2020] [Indexed: 12/15/2022] Open
Abstract
The application of pluripotent stem cells is expected to contribute to the elucidation of unknown mechanism of human diseases. However, in vitro induction of organ-specific cells, such as pancreas and liver, is still difficult and the reproduction of their disorders in a model has been unfeasible. To study the mechanism of human hereditary pancreatitis (HP), we here performed the blastocyst complementation (BC) method. In the BC method, mouse embryonic stem (ES) cells harboring CRISPR/CAS9-mediated mutations in the Prss1 gene were injected into blastocysts with deficient Pdx1 gene, which is a critical transcription factor in the development of pancreas. The results showed that trypsin was activated extremely in Prss1-mutant mice. This implied that the mouse phenotype mimics that of human HP and that the BC method was useful for the reproduction and study of pancreatic disorders. The present study opens the possibility of investigating uncharacterized human diseases by utilizing the BC method.
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Affiliation(s)
- Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan.,Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan.,Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan
| | - Ayako Isotani
- Organ Developmental Engineering, Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0192 Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan.,Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582 Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan
| | | | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871 Japan
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9
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Yanagisawa K, Toratani M, Asai A, Konno M, Niioka H, Mizushima T, Satoh T, Miyake J, Ogawa K, Vecchione A, Doki Y, Eguchi H, Ishii H. Convolutional Neural Network Can Recognize Drug Resistance of Single Cancer Cells. Int J Mol Sci 2020; 21:E3166. [PMID: 32365822 PMCID: PMC7246790 DOI: 10.3390/ijms21093166] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 04/28/2020] [Accepted: 04/28/2020] [Indexed: 01/08/2023] Open
Abstract
It is known that single or isolated tumor cells enter cancer patients' circulatory systems. These circulating tumor cells (CTCs) are thought to be an effective tool for diagnosing cancer malignancy. However, handling CTC samples and evaluating CTC sequence analysis results are challenging. Recently, the convolutional neural network (CNN) model, a type of deep learning model, has been increasingly adopted for medical image analyses. However, it is controversial whether cell characteristics can be identified at the single-cell level by using machine learning methods. This study intends to verify whether an AI system could classify the sensitivity of anticancer drugs, based on cell morphology during culture. We constructed a CNN based on the VGG16 model that could predict the efficiency of antitumor drugs at the single-cell level. The machine learning revealed that our model could identify the effects of antitumor drugs with ~0.80 accuracies. Our results show that, in the future, realizing precision medicine to identify effective antitumor drugs for individual patients may be possible by extracting CTCs from blood and performing classification by using an AI system.
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Affiliation(s)
- Kiminori Yanagisawa
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (K.Y.); (A.A.); (T.M.); (Y.D.); (H.E.)
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan;
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan;
| | - Masayasu Toratani
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (M.T.); (K.O.)
- Department of Radiation Oncology, Osaka International Cancer Institute, 3-1-69 Otemae, Chuo-ku, Osaka-shi, Osaka 541-8567, Japan
| | - Ayumu Asai
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (K.Y.); (A.A.); (T.M.); (Y.D.); (H.E.)
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan;
- Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Masamitsu Konno
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan;
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan;
| | - Hirohiko Niioka
- Institute for Datability Science, Osaka University, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan;
| | - Tsunekazu Mizushima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (K.Y.); (A.A.); (T.M.); (Y.D.); (H.E.)
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan;
| | - Jun Miyake
- Global Center for Medical Engineering and Informatics, Osaka University, 1-3 Yamadaoka, Suita, Osaka 565-0871, Japan;
| | - Kazuhiko Ogawa
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (M.T.); (K.O.)
| | - Andrea Vecchione
- Department of Clinical and Molecular Medicine, University of Rome “Sapienza”, Santo Andrea Hospital, via di Grottarossa, 1035-00189 Rome, Italy;
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (K.Y.); (A.A.); (T.M.); (Y.D.); (H.E.)
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (K.Y.); (A.A.); (T.M.); (Y.D.); (H.E.)
| | - Hideshi Ishii
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan; (K.Y.); (A.A.); (T.M.); (Y.D.); (H.E.)
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan;
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10
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Asai A, Konno M, Ozaki M, Otsuka C, Vecchione A, Arai T, Kitagawa T, Ofusa K, Yabumoto M, Hirotsu T, Taniguchi M, Eguchi H, Doki Y, Ishii H. COVID-19 Drug Discovery Using Intensive Approaches. Int J Mol Sci 2020; 21:E2839. [PMID: 32325767 PMCID: PMC7215413 DOI: 10.3390/ijms21082839] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/09/2020] [Accepted: 04/14/2020] [Indexed: 12/20/2022] Open
Abstract
Since the infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was reported in China during December 2019, the coronavirus disease 2019 (COVID-19) has spread on a global scale, causing the World Health Organization (WHO) to issue a warning. While novel vaccines and drugs that target SARS-CoV-2 are under development, this review provides information on therapeutics which are under clinical trials or are proposed to antagonize SARS-CoV-2. Based on the information gained from the responses to other RNA coronaviruses, including the strains that cause severe acute respiratory syndrome (SARS)-coronaviruses and Middle East respiratory syndrome (MERS), drug repurposing might be a viable strategy. Since several antiviral therapies can inhibit viral replication cycles or relieve symptoms, mechanisms unique to RNA viruses will be important for the clinical development of antivirals against SARS-CoV-2. Given that several currently marketed drugs may be efficient therapeutic agents for severe COVID-19 cases, they may be beneficial for future viral pandemics and other infections caused by RNA viruses when standard treatments are unavailable.
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Affiliation(s)
- Ayumu Asai
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
- Artificial Intelligence Research Center, Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Masamitsu Konno
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
| | - Miyuki Ozaki
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
| | - Chihiro Otsuka
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
| | - Andrea Vecchione
- Department of Clinical and Molecular Medicine, University of Rome “Sapienza”, Santo Andrea Hospital, via di Grottarossa, 1035-00189 Rome, Italy;
| | - Takahiro Arai
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Unitech Co., Ltd., Kashiwa 277-0005, Japan
| | - Toru Kitagawa
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
- Kyowa-kai Medical Corporation, Osaka 540-0008, Japan
| | - Ken Ofusa
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Prophoenix Division, Food and Life-Science Laboratory, Idea Consultants, Inc., Osaka-City, Osaka 559-8519, Japan
| | - Masami Yabumoto
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Kinshu-Kai Medical Corporation, Osaka 558-0041, Japan
| | - Takaaki Hirotsu
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Hirotsu Bio Science Inc., Tokyo 107-0062, Japan
| | - Masateru Taniguchi
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;
| | - Hidetoshi Eguchi
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Yuichiro Doki
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Hideshi Ishii
- Center of Medical Innovation and Translational Research, Osaka University Graduate School of Medicine, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan; (A.A.); (M.K.); (M.O.); (C.O.); (T.A.); (T.K.); (K.O.); (M.Y.); (T.H.); (H.E.); (Y.D.)
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11
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Asai A, Konno M, Koseki J, Taniguchi M, Vecchione A, Ishii H. One-carbon metabolism for cancer diagnostic and therapeutic approaches. Cancer Lett 2019; 470:141-148. [PMID: 31759958 DOI: 10.1016/j.canlet.2019.11.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 11/08/2019] [Accepted: 11/18/2019] [Indexed: 12/31/2022]
Abstract
Altered metabolism is critical for the rapid and unregulated proliferation of cancer cells; hence the requirement for an abundant source of nucleotides. One characteristic of this metabolic reprogramming is in one-carbon (1C) metabolism, which is particularly noteworthy for its role in DNA synthesis. Various forms of methylation are also noteworthy as they relate to cancer cell survival and proliferation. In recent years, 1C metabolism has received substantial attention for its role in cancer malignancy via these functions. Therefore, therapeutic inhibitors targeting 1C metabolism have been utilized as anticancer drugs. This review outlines the importance of 1C metabolism and its clinical application in cancer. Understanding 1C metabolism could aid the development of novel cancer diagnostic and therapeutic methods.
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Affiliation(s)
- Ayumu Asai
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, 565-0871, Japan; Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, 565-0871, Japan; Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, 565-0871, Japan
| | - Jun Koseki
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, 565-0871, Japan
| | - Masateru Taniguchi
- Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Andrea Vecchione
- Department of Clinical and Molecular Medicine, University of Rome "Sapienza", Santo Andrea Hospital, Via di Grottarossa, Rome, 1035-00189, Italy
| | - Hideshi Ishii
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, 565-0871, Japan.
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12
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Tsunekuni K, Konno M, Haraguchi N, Koseki J, Asai A, Matsuoka K, Kobunai T, Takechi T, Doki Y, Mori M, Ishii H. CD44/CD133-Positive Colorectal Cancer Stem Cells are Sensitive to Trifluridine Exposure. Sci Rep 2019; 9:14861. [PMID: 31619711 PMCID: PMC6795793 DOI: 10.1038/s41598-019-50968-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 09/12/2019] [Indexed: 12/16/2022] Open
Abstract
Cancer stem cells (CSCs) are involved in metastatic colorectal cancer recurrence, but no effective therapy targeting these cells is currently available. Because trifluridine (FTD)/tipiracil therapy is used for refractory colorectal cancer, we sought to determine whether FTD is effective against CSC-like cells. CD44+CD133+ high-expressing and other populations of human DLD-1 colon cancer cells were separately isolated through fluorescence-activated cell sorting. The sphere-forming activity of each population and the anti-sphere-forming effects of FTD and fluorouracil (5-FU) on CD44+CD133+ cells were then measured. CD44+CD133+ DLD-1 cells formed substantially more spheres than other cells. Moreover, treating CD44+CD133+ DLD-1 cells with subtoxic concentrations of FTD (1 µM) inhibited sphere formation, and this was superior to the effect of subtoxic concentrations (1 µM) of 5-FU. The associated inhibition rates for FTD and 5-FU were 58.2% and 26.1%, respectively. Further, CD44+CD133+ DLD-1 cells expressed higher levels of thymidine kinase 1, which is responsible for FTD phosphorylation, than DLD-1 cells, and FTD was incorporated into the DNA of CD44+CD133+ DLD-1 cells. Thus, our data show that FTD treatment is effective against CSC-like cells and might be applied as CSC-targeting chemotherapy for tumor subtypes with high CD44 and CD133 expression.
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Affiliation(s)
- Kenta Tsunekuni
- Department of Gastrointestinal Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Translational Research Laboratory, Taiho Pharmaceutical Co., Ltd., Tokushima, 771-0194, Japan.,Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Naotsugu Haraguchi
- Department of Gastrointestinal Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Jun Koseki
- Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Ayumu Asai
- Department of Gastrointestinal Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Kazuaki Matsuoka
- Translational Research Laboratory, Taiho Pharmaceutical Co., Ltd., Tokushima, 771-0194, Japan
| | - Takashi Kobunai
- Translational Research Laboratory, Taiho Pharmaceutical Co., Ltd., Tokushima, 771-0194, Japan
| | - Teiji Takechi
- Translational Research Laboratory, Taiho Pharmaceutical Co., Ltd., Tokushima, 771-0194, Japan
| | - Yuichiro Doki
- Department of Gastrointestinal Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Masaki Mori
- Department of Gastrointestinal Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan. .,Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.
| | - Hideshi Ishii
- Department of Gastrointestinal Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan. .,Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.
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13
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Konno M, Koseki J, Asai A, Yamagata A, Shimamura T, Motooka D, Okuzaki D, Kawamoto K, Mizushima T, Eguchi H, Takiguchi S, Satoh T, Mimori K, Ochiya T, Doki Y, Ofusa K, Mori M, Ishii H. Distinct methylation levels of mature microRNAs in gastrointestinal cancers. Nat Commun 2019; 10:3888. [PMID: 31467274 PMCID: PMC6715669 DOI: 10.1038/s41467-019-11826-1] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 08/06/2019] [Indexed: 02/07/2023] Open
Abstract
The biological significance of micro (mi)RNAs has traditionally been evaluated according to their RNA expression levels based on the assumption that miRNAs recognize and regulate their targets in an unvarying fashion. Here we show that a fraction of mature miRNAs including miR-17-5p, -21-5p, and -200c-3p and let-7a-5p harbor methyl marks that potentially alter their stability and target recognition. Importantly, methylation of these miRNAs was significantly increased in cancer tissues as compared to paired normal tissues. Furthermore, miR-17-5p methylation level in serum samples distinguished early pancreatic cancer patients from healthy controls with extremely high sensitivity and specificity. These findings provide a basis for diagnostic strategies for early-stage cancer and add a dimension to our understanding of miRNA biology. In cancer it is assumed that microRNAs recognise and regulate their targets uniformly. Here, the authors show that in gastrointestinal cancers methylation of microRNAs may impact their stability, and that levels of microRNA methylation are distinct in pancreatic cancer patients compared to healthy controls with potential diagnostic implications.
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Affiliation(s)
- Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Jun Koseki
- Department of Cancer Profiling Discovery/ Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Department of Cancer Profiling Discovery/ Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Akira Yamagata
- Prophoenix Division, Food and Life-Science Laboratory, Idea Consultants, Inc., Osaka-city, Osaka, Japan
| | - Teppei Shimamura
- Division of Systems Biology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Daisuke Motooka
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tsunekazu Mizushima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Shuji Takiguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Koshi Mimori
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Oita, Japan
| | - Takahiro Ochiya
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Ken Ofusa
- Prophoenix Division, Food and Life-Science Laboratory, Idea Consultants, Inc., Osaka-city, Osaka, Japan.
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
| | - Hideshi Ishii
- Department of Cancer Profiling Discovery/ Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
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14
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Takami H, Fukushima S, Aoki K, Satomi K, Narumi K, Hama N, Matsushita Y, Fukuoka K, Yamasaki K, Nakamura T, Mukasa A, Saito N, Suzuki T, Yanagisawa T, Nakamura H, Sugiyama K, Tamura K, Maehara T, Nakada M, Nonaka M, Asai A, Yokogami K, Takeshima H, Iuchi T, Kanemura Y, Kobayashi K, Nagane M, Kurozumi K, Yoshimoto K, Matsuda M, Matsumura A, Hirose Y, Tokuyama T, Kumabe T, Ueki K, Narita Y, Shibui S, Totoki Y, Shibata T, Nakazato Y, Nishikawa R, Matsutani M, Ichimura K. Intratumoural immune cell landscape in germinoma reveals multipotent lineages and exhibits prognostic significance. Neuropathol Appl Neurobiol 2019; 46:111-124. [PMID: 31179566 DOI: 10.1111/nan.12570] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 06/03/2019] [Indexed: 12/13/2022]
Abstract
AIMS Alterations in microenvironments are a hallmark of cancer, and these alterations in germinomas are of particular significance. Germinoma, the most common subtype of central nervous system germ cell tumours, often exhibits massive immune cell infiltration intermingled with tumour cells. The role of these immune cells in germinoma, however, remains unknown. METHODS We investigated the cellular constituents of immune microenvironments and their clinical impacts on prognosis in 100 germinoma cases. RESULTS Patients with germinomas lower in tumour cell content (i.e. higher immune cell infiltration) had a significantly longer progression-free survival time than those with higher tumour cell contents (P = 0.03). Transcriptome analyses and RNA in-situ hybridization indicated that infiltrating immune cells comprised a wide variety of cell types, including lymphocytes and myelocyte-lineage cells. High expression of CD4 was significantly associated with good prognosis, whereas elevated nitric oxide synthase 2 was associated with poor prognosis. PD1 (PDCD1) was expressed by immune cells present in most germinomas (93.8%), and PD-L1 (CD274) expression was found in tumour cells in the majority of germinomas examined (73.5%). CONCLUSIONS The collective data strongly suggest that infiltrating immune cells play an important role in predicting treatment response. Further investigation should lead to additional categorization of germinoma to safely reduce treatment intensity depending on tumour/immune cell balance and to develop possible future immunotherapies.
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Affiliation(s)
- H Takami
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan.,Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - S Fukushima
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan
| | - K Aoki
- Division of Gene and Immune Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - K Satomi
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan.,Department of Pathology and Clinical Laboratories, National Cancer Center Hospital, Tokyo, Japan
| | - K Narumi
- Division of Gene and Immune Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - N Hama
- Division of Cancer Genomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Y Matsushita
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan.,Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - K Fukuoka
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan.,Division of Pediatric Neuro-Oncology, Saitama Medical University International Medical Center, Saitama, Japan
| | - K Yamasaki
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan.,Department of Pediatrics, Osaka City General Hospital, Osaka, Japan
| | - T Nakamura
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan.,Department of Neurosurgery, Graduate School of Medicine, Yokohama City University, Kanagawa, Japan
| | - A Mukasa
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, Tokyo, Japan.,Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - N Saito
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - T Suzuki
- Department of Neuro-Oncology/Neurosurgery, Saitama Medical University International Medical Center, Saitama, Japan
| | - T Yanagisawa
- Division of Pediatric Neuro-Oncology, Saitama Medical University International Medical Center, Saitama, Japan
| | - H Nakamura
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.,Department of Neurosurgery, Kurume University, Fukuoka, Japan
| | - K Sugiyama
- Department of Neurosurgery, Faculty of Medicine, Hiroshima University, Hiroshima, Japan
| | - K Tamura
- Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - T Maehara
- Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - M Nakada
- Department of Neurosurgery, Graduate School of Medical Science, Kanazawa University, Ishikawa, Japan
| | - M Nonaka
- Department of Neurosurgery, Kansai Medical University Hospital, Osaka, Japan
| | - A Asai
- Department of Neurosurgery, Kansai Medical University Hospital, Osaka, Japan
| | - K Yokogami
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - H Takeshima
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - T Iuchi
- Department of Neurosurgery, Chiba Cancer Center, Chiba, Japan
| | - Y Kanemura
- Department of Neurosurgery, Osaka National Hospital, National Hospital Organization, Osaka, Japan.,Department of Biomedical Research and Innovation, Institute for Clinical Research, Osaka National Hospital, National Hospital Organization, Osaka, Japan
| | - K Kobayashi
- Department of Neurosurgery, Faculty of Medicine, Kyorin University, Tokyo, Japan
| | - M Nagane
- Department of Neurosurgery, Faculty of Medicine, Kyorin University, Tokyo, Japan
| | - K Kurozumi
- Department of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Okayama, Japan
| | - K Yoshimoto
- Department of Neurosurgery, Kyusyu University Hospital, Fukuoka, Japan
| | - M Matsuda
- Department of Neurosurgery, University of Tsukuba Hospital, Ibaraki, Japan
| | - A Matsumura
- Department of Neurosurgery, University of Tsukuba Hospital, Ibaraki, Japan
| | - Y Hirose
- Department of Neurosurgery, Fujita Health University Hospital, Aichi, Japan
| | - T Tokuyama
- Department of Neurosurgery, Hamamatsu University Hospital, Shizuoka, Japan
| | - T Kumabe
- Department of Neurosurgery, Kitasato University, Kanagawa, Japan
| | - K Ueki
- Department of Neurosurgery, Dokkyo Medical Univeristy, Tochigi, Japan
| | - Y Narita
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - S Shibui
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Y Totoki
- Division of Cancer Genomics, National Cancer Center Research Institute, Tokyo, Japan
| | - T Shibata
- Division of Cancer Genomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Y Nakazato
- Department of Pathology, Hidaka Hospital, Gunma, Japan
| | - R Nishikawa
- Department of Neurosurgery, Graduate School of Medicine, Yokohama City University, Kanagawa, Japan
| | - M Matsutani
- Department of Neurosurgery, Graduate School of Medicine, Yokohama City University, Kanagawa, Japan
| | - K Ichimura
- Division of Brain Tumor Translational Research, National Cancer Center Research Institute, Tokyo, Japan
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15
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Matsushita K, Okuda T, Mori S, Konno M, Eguchi H, Asai A, Koseki J, Iwagami Y, Yamada D, Akita H, Asaoka T, Noda T, Kawamoto K, Gotoh K, Kobayashi S, Kasahara Y, Morihiro K, Satoh T, Doki Y, Mori M, Ishii H, Obika S. A Hydrogen Peroxide Activatable Gemcitabine Prodrug for the Selective Treatment of Pancreatic Ductal Adenocarcinoma. ChemMedChem 2019; 14:1384-1391. [DOI: 10.1002/cmdc.201900324] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Indexed: 01/03/2023]
Affiliation(s)
- Katsunori Matsushita
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Takumi Okuda
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
| | - Shohei Mori
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Ayumu Asai
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Jun Koseki
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Yoshifumi Iwagami
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Daisaku Yamada
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Present address: Department of Digestive SurgeryOsaka International Cancer Institute 3-1-69 Otemae, Chuo-ku Osaka Osaka 541-8567 Japan
| | - Hirofumi Akita
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Tadafumi Asaoka
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Takehiro Noda
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Koichi Kawamoto
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Present address: Kinki Regional Bureau of Health and WelfareMinistry of Health, Labour and Welfare 4-1-76 Nonin Bashi, Chuo-ku Osaka Osaka 540-0008 Japan
| | - Kunihito Gotoh
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Shogo Kobayashi
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Yuuya Kasahara
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki Osaka 567-0085 Japan
| | - Kunihiko Morihiro
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki Osaka 567-0085 Japan
- Present address: Department of Chemistry and BiotechnologyGraduate School of EngineeringThe University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Yuichiro Doki
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Masaki Mori
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Present address: Department of Surgery and ScienceGraduate School of Medical SciencesKyushu University 3-1-1 Maidashi, Higashi-ku Fukuoka 812-8582 Japan
| | - Hideshi Ishii
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Satoshi Obika
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki Osaka 567-0085 Japan
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16
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Tsunekuni K, Konno M, Koseki J, Asai A, Matsuoka K, Takechi T, Doki Y, Mori M, Ishii H. Abstract 2963: CD44+/CD133+ colorectal cancer stem cells are sensitive to trifluridine. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-2963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Cancer stem cells (CSCs) are involved in disease recurrence, metastases, and therapeutic resistance. However, anticancer agents that target CSCs are not currently available. Trifluridine (FTD)/tipiracil (TPI), a novel oral antitumor drug, was approved for the treatment of patients with metastatic colorectal cancer who had been previously treated with anti-vascular endothelial growth factors; anti-epidermal growth factor receptors (in patients with ras wild-type genes); or fluoropyrimidine-, oxaliplatin-, irinotecan-based chemotherapies. FTD/TPI improves overall survival, and FTD is the key component of FTD/TPI. Here, we demonstrated the efficacy of FTD against CD44 and CD133 high-expressing (CD44+CD133+) colorectal cancer cells that possess CSC-like properties.
Method: CD44+CD133+ and other populations of DLD-1, a colorectal cell line, were separated by fluorescence-activated cell sorting (FACS). The sphere-forming activity of each population, and anti- sphere-forming effects of FTD and fluorouracil (5-FU) on CD44+CD133+ cells, were measured. In addition, DLD-1 and HCT-116, two colorectal cell lines, were treated with FTD for 5 months. The CSC markers CD44 and CD133 were measured by FACS, and the cells' in vitro and in vivo tumor-initiating properties were evaluated.
Results: CD44+CD133+ DLD-1 cells formed significantly more spheres than did CD44-CD133- cells (sphere ratio CD44+CD133+/CD44-CD133- = 4.0) and CD44+CD133- cells (sphere ratio CD44+CD133+/CD44+CD133- = 1.7). In the in vitro proliferation assay, CD44+CD133+ cells had greater 5-FU resistance, but not higher FTD resistance, than did unsorted cells. In addition, treatment of CD44+CD133+ DLD-1 cells with subtoxic concentrations of FTD (1 µM) disrupted sphere formation, which was superior to the effect of treatment with 1 µM 5-FU. The inhibition rates for FTD and 5-FU were 59.5% and 14.3%, respectively. DLD-1 and HCT-116 cell lines treated with FTD for 5 months had smaller CD44+CD133+ populations and lower sphere-forming activity than did untreated cell lines; population decline rates were 93.8% and 74.7%, respectively. Furthermore, 5 months of in vitro exposure to FTD reduced in vivo tumor formation potential in both cell lines. These results suggest that FTD is effective against CSC-like cells, and that treatment with FTD might reduce CSC-like populations.
Conclusion: FTD had a direct effect on the sphere-forming activity of CSC-like CD44+CD133+ cells that was superior to that of treatment with 5-FU. Its effectiveness against CSC-like CD44+CD133+ cells suggests that FTD might be useful for CSC-targeted chemotherapy in tumors that highly express CD44 and CD133.
Citation Format: Kenta Tsunekuni, Masamitsu Konno, Jun Koseki, Ayumu Asai, Kazuaki Matsuoka, Teiji Takechi, Yuichiro Doki, Masaki Mori, Hideshi Ishii. CD44+/CD133+ colorectal cancer stem cells are sensitive to trifluridine [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 2963.
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17
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Takaoka Y, Konno M, Koseki J, Colvin H, Asai A, Tamari K, Satoh T, Mori M, Doki Y, Ogawa K, Ishii H. Mitochondrial pyruvate carrier 1 expression controls cancer epithelial-mesenchymal transition and radioresistance. Cancer Sci 2019; 110:1331-1339. [PMID: 30801869 PMCID: PMC6447954 DOI: 10.1111/cas.13980] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/11/2019] [Accepted: 02/13/2019] [Indexed: 12/18/2022] Open
Abstract
Mitochondrial pyruvate carrier (MPC) is known to cause different expressions in normal and cancer cells. We observed a change in phenotype with the suppression of MPC expression. We knocked down MPC1 and/or MPC2 using siRNA or shRNA. We observed its cell morphology and accompanying molecular marker. Furthermore, the radioresistance of the MPC knockdown cell line was examined using a colony formation assay. MPC1‐suppressed cells changed their morphology to a spindle shape. Epithelial‐mesenchymal transition (EMT) was suspected, and examination of the EMT marker by PCR showed a decrease in E‐cadherin and an increase in fibronectin. Focusing on glutamine metabolism as the mechanism of this phenomenon, we knocked down the glutamine‐metabolizing enzyme glutaminase (GLS). EMT was also observed in GLS‐suppressed cells. Furthermore, when MPC1‐suppressed cells were cultured in a glutamine‐deficient medium, changes in EMT markers were suppressed. In addition, MPC1‐suppressed cells also increased with a significant difference in radioresistance. Decreased MPC1 expression favorably affects EMT and radioresistance of cancer.
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Affiliation(s)
- Yuji Takaoka
- Department of Radiation Oncology, Osaka University, Suita, Japan.,Department of Medical Data Science, Osaka University, Suita, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, Japan
| | - Jun Koseki
- Department of Medical Data Science, Osaka University, Suita, Japan
| | - Hugh Colvin
- Department of Medical Data Science, Osaka University, Suita, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, Japan
| | - Ayumu Asai
- Department of Medical Data Science, Osaka University, Suita, Japan
| | - Keisuke Tamari
- Department of Radiation Oncology, Osaka University, Suita, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Osaka University, Suita, Japan.,Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Osaka University, Suita, Japan
| | - Kazuhiko Ogawa
- Department of Radiation Oncology, Osaka University, Suita, Japan
| | - Hideshi Ishii
- Department of Medical Data Science, Osaka University, Suita, Japan
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18
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Tatekawa S, Konno M, Asai A, Koseki J, Taketo K, Ishii H, Ogawa K. EP-2165 m6A RNA modification by METTL3 regulates chemo-and radioresistance in pancreatic cancer cells. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32585-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Asai A, Koseki J, Konno M, Nishimura T, Gotoh N, Satoh T, Doki Y, Mori M, Ishii H. Drug discovery of anticancer drugs targeting methylenetetrahydrofolate dehydrogenase 2. Heliyon 2018; 4:e01021. [PMID: 30582043 PMCID: PMC6299143 DOI: 10.1016/j.heliyon.2018.e01021] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/10/2018] [Accepted: 12/04/2018] [Indexed: 01/07/2023] Open
Abstract
Many anticancer drugs have serious adverse effects; therefore, it is necessary to target features specific to cancer cells to minimize the effects on healthy cells. Methylenetetrahydrofolate dehydrogenase 2 (MTHFD2) was reported to be specifically enhanced in cancer. We confirmed the validity of MTHFD2 as a drug discovery target using clinical data. In addition, we performed in silico screening to design an anticancer drug specifically targeting MTHFD2. Analysis of the clinical data indicated that MTHFD2 was enhanced in most cancers compared with normal tissues, and affected the prognosis in cancer patients. Candidate compounds for MTHFD2 inhibitors were identified using in silico drug discovery techniques, and the important interactions for MTHFD2 binding were determined. In addition, these candidate compounds decreased levels of MTHFD2 metabolites in cancer cells. The findings of the present study may help to develop anticancer drugs targeting MTHFD2, with a view to minimizing the adverse effects of anticancer drugs.
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Affiliation(s)
- Ayumu Asai
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Gastroenterological Surgery Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Jun Koseki
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Tatsunori Nishimura
- Division of Cancer Cell Biology, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Japan
| | - Noriko Gotoh
- Division of Cancer Cell Biology, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Yuichiro Doki
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Gastroenterological Surgery Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Masaki Mori
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Gastroenterological Surgery Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Hideshi Ishii
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
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20
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Toratani M, Konno M, Asai A, Koseki J, Kawamoto K, Tamari K, Li Z, Sakai D, Kudo T, Satoh T, Sato K, Motooka D, Okuzaki D, Doki Y, Mori M, Ogawa K, Ishii H. A Convolutional Neural Network Uses Microscopic Images to Differentiate between Mouse and Human Cell Lines and Their Radioresistant Clones. Cancer Res 2018; 78:6703-6707. [PMID: 30254144 DOI: 10.1158/0008-5472.can-18-0653] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/06/2018] [Accepted: 09/21/2018] [Indexed: 11/16/2022]
Abstract
: Artificial intelligence (AI) trained with a convolutional neural network (CNN) is a recent technological advancement. Previously, several attempts have been made to train AI using medical images for clinical applications. However, whether AI can distinguish microscopic images of mammalian cells has remained debatable. This study assesses the accuracy of image recognition techniques using the CNN to identify microscopic images. We also attempted to distinguish between mouse and human cells and their radioresistant clones. We used phase-contrast microscopic images of radioresistant clones from two cell lines, mouse squamous cell carcinoma NR-S1, and human cervical carcinoma ME-180. We obtained 10,000 images of each of the parental NR-S1 and ME-180 controls as well as radioresistant clones. We trained the CNN called VGG16 using these images and obtained an accuracy of 96%. Features extracted by the trained CNN were plotted using t-distributed stochastic neighbor embedding, and images of each cell line were well clustered. Overall, these findings suggest the utility of image recognition using AI for predicting minute differences among phase-contrast microscopic images of cancer cells and their radioresistant clones. SIGNIFICANCE: This study demonstrates rapid and accurate identification of radioresistant tumor cells in culture using artifical intelligence; this should have applications in future preclinical cancer research.
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Affiliation(s)
- Masayasu Toratani
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Masamitsu Konno
- Department of Disease Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Ayumu Asai
- Department of Disease Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Jun Koseki
- Department of Disease Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Koichi Kawamoto
- Department of Disease Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Keisuke Tamari
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Zhihao Li
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Daisuke Sakai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Toshihiro Kudo
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Katsutoshi Sato
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, QST, Inage, Chiba, Japan.,Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Daisuke Motooka
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Kazuhiko Ogawa
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
| | - Hideshi Ishii
- Department of Disease Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan. .,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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21
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Toshiyama R, Konno M, Eguchi H, Takemoto H, Noda T, Asai A, Koseki J, Haraguchi N, Ueda Y, Matsushita K, Asukai K, Ohashi T, Iwagami Y, Yamada D, Sakai D, Asaoka T, Kudo T, Kawamoto K, Gotoh K, Kobayashi S, Satoh T, Doki Y, Nishiyama N, Mori M, Ishii H. Poly(ethylene glycol)-poly(lysine) block copolymer-ubenimex conjugate targets aminopeptidase N and exerts an antitumor effect in hepatocellular carcinoma stem cells. Oncogene 2018; 38:244-260. [PMID: 30089817 DOI: 10.1038/s41388-018-0406-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 05/13/2018] [Accepted: 06/08/2018] [Indexed: 12/30/2022]
Abstract
Previous studies highlighted that aminopeptidase N (APN)/CD13 acts as a scavenger in the survival of hepatocellular carcinoma (HCC) stem cells by reducing reactive oxygen species (ROS) levels. Hence, it has been proposed that APN/CD13 inhibition can increase cellular ROS levels and sensitize cells to chemotherapeutic agents. Although ubenimex, also known as bestatin, competitively inhibits proteases such as APN/CD13 on the cellular membrane and it is clinically used for patients with acute myeloid leukemia and lymphedema, research has demonstrated that higher concentrations of the agent induce the death of APN/CD13+ HCC stem cells. In this study, we developed a poly(ethylene glycol)-poly(lysine) block copolymer-ubenimex conjugate (PEG-b-PLys(Ube)) to increase the efficacy of reagents in APN/CD13+ cancer stem cells. Exposure to PEG-b-PLys(Ube) increased the intracellular ROS concentration by inhibiting APN enzyme activity, permitting the induction of apoptosis and attenuation of HCC cell proliferation. In addition, PEG-b-PLys(Ube) exhibited a relatively stronger antitumor effect in mice than PEG-b-PLys alone or phosphate-buffered saline. Moreover, an isobologram analysis revealed that combinations of fluorouracil, cisplatin, or doxorubicin with PEG-b-PLys(Ube) exhibited synergistic effects. This study demonstrated that PEG-b-PLys(Ube) does not impair the properties of ubenimex and exerts a potent antitumor effect.
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Affiliation(s)
- Reishi Toshiyama
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Masamitsu Konno
- Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Hidetoshi Eguchi
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Hiroyasu Takemoto
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, Japan
| | - Takehiro Noda
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Ayumu Asai
- Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Jun Koseki
- Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Naotsugu Haraguchi
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yuji Ueda
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Katsunori Matsushita
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kei Asukai
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Tomofumi Ohashi
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yoshifumi Iwagami
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Daisaku Yamada
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Daisuke Sakai
- Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Tadafumi Asaoka
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Toshihiro Kudo
- Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Koichi Kawamoto
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kunihito Gotoh
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Shogo Kobayashi
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Taroh Satoh
- Departments of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yuichiro Doki
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Nobuhiro Nishiyama
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, Japan
| | - Masaki Mori
- Departments of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.
| | - Hideshi Ishii
- Departments of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.
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Yanagisawa K, Konno M, Toratani M, Niioka H, Asai A, Koseki J, Tsunekuni K, Satoh T, Ogawa K, Miyake J, Doki Y, Mori M, Ishii H. Abstract 2859: Deep learning recognizes FTD-resistant isolated cancer cells of colon cancer. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-2859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
In recent years, innovative technologies that extract feature descriptions from the large volume of data on speech recognition, visual object recognition and detection as well as many other domains, such as drug discovery and DNA sequence annotations by deep learning techniques and applying them to automatic recognition etc. are drawing attention. As cancer research aiming at applying deep learning techniques to cases that are resistant to surgical therapy and drug therapy in metastatic colorectal cancer, we developed a fundamental technology that can predict the resistance of free cancer cells to fluorinated pyrimidine anticancer drugs by deep learning from the morphological image data taken from images. An experimental model was used in our investigation in order to clarify whether or not its image recognition ability can be applied to the determination of drug resistance of free cancer cells circulating in the peripheral blood. That is, a cell line established by inducing a resistance to FTD or 5 FU added to the cell culture solution was prepared over several months and the ability to recognize the tolerance of the drug was examined from a large volume of image data, and it was shown that it can be distinguished dominantly in a short-term culture system. Further, as a result of examination after separation at the single cell level, it was possible to distinguish fluorescent-labeled resistant strains dominantly. In addition, we were able to recognize the drug resistance character well by injecting resistant strains intravenously into the mice to prepare a model of free cancer cells and collecting circulating free cancer cells. Moreover, as a pre-clinical model, resistant strains were mixed with susceptible strains at various ratios and transplanted into mice and experimented. As a result, the nature of the resistance to treatment was predicted by image recognition, and death of the mice due to cancer was well correlated with the malignant trait of drug-resistant cancer cells. Then, by linking the feature expression obtained from the image and the Omics data, a detailed stratification of treatment resistance was possible. From the above, a technique in the mouse that can distinguish free cancer cells collected from the peripheral blood by deep learning of images was constructed, and a foundation to be applied to medical treatment and precision medical care in the future was established.
Citation Format: Kiminori Yanagisawa, Masamitsu Konno, Masayasyu Toratani, Hirohiko Niioka, Ayumu Asai, Jun Koseki, Kenta Tsunekuni, Taroh Satoh, Kazuhiko Ogawa, Jun Miyake, Yuichiro Doki, Masaki Mori, Hideshi Ishii. Deep learning recognizes FTD-resistant isolated cancer cells of colon cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 2859.
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Affiliation(s)
| | - Masamitsu Konno
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | | | - Hirohiko Niioka
- 2Osaka University Graduate School of Information Science and Technology, Suita city, Japan
| | - Ayumu Asai
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | - Jun Koseki
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | - Kenta Tsunekuni
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | - Taroh Satoh
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | - Kazuhiko Ogawa
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | - Jun Miyake
- 2Osaka University Graduate School of Information Science and Technology, Suita city, Japan
| | - Yuichiro Doki
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | - Masaki Mori
- 1Osaka University Graduate School of Medicine, Suita city, Japan
| | - Hideshi Ishii
- 1Osaka University Graduate School of Medicine, Suita city, Japan
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23
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Konno M, Yanagisawa K, Matsushita K, Asai A, Koseki J, Matsusaki M, Deguchi S, Doki Y, Mori M, Ishii H. Abstract 5164: Mechanosensor MYL9 regulates cancer cell malignancy in gastrointestinal tumors. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-5164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Although the stiffness of tissues likely is involved in the malignant behavior of tumors, it remains to be clarified which molecules control the nature, how it is involved in the invasiveness of tumors, or whether any marker is available for the prediction of cancer patient prognosis. In the present study, we studied the role of Myl9, a non-muscle-type, myosin light chain by the experiment in vitro, and assessed the usefulness in the stratification of patients in vivo as the precision medicine. Given that Myl9 is involved in the contraction of cell skeleton, cell hardness, and alterations of cell morphology in various tissues, we first examined whether the expression of the Myl9 is associated with the clinical status of tumors by immunohistochemistry. The results of 45 cases with colon cancer and pancreatic cancer indicated that the increased expression of Myl9 is associated significantly with a reduced provability of overall survival and disease-free survival of those cancers. Moreover, we noted the differential expression of Myl9 in epithelial cancer cells and mesenchymal fibroblasts, i.e., the accumulation of Myl9 staining in cell nuclei of fibroblasts. The experiment of 3-dimensional culture with cancer cells and fibroblasts confirmed the results. Furthermore, we investigated whether Myl9 overexpression is involved in the biologic behavior of gastrointestinal cancer cells. The results showed that the rentiviral-mediated overexpression of Myl9 resulted in an increase of cell proliferation and invasion as well as tumorigenicity in mice. The present study indicates that Myl9 protein can play a fundamental role in the malignant behaviors of gastrointestinal cancer cells.
Citation Format: Masamitsu Konno, Kiminori Yanagisawa, Katsunori Matsushita, Ayumu Asai, Jun Koseki, Michiya Matsusaki, Shinji Deguchi, Yuichiro Doki, Masaki Mori, Hideshi Ishii. Mechanosensor MYL9 regulates cancer cell malignancy in gastrointestinal tumors [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 5164.
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Tsunekuni K, Konno M, Koseki J, Asai A, Doki Y, Mori M, Ishii H. Abstract 2890: Trifluridine efficacy in cancer stem cell. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-2890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Cancer stem cells (CSC) have been involved in disease recurrence, metastasis, and therapeutic resistance, but effective anti-cancer agent for these cells is not still currently available. Trifluridine (FTD) is a key component of the novel oral antitumor drug trifluridine/tipiracil, which was approved for the treatment of patients with metastatic colorectal cancer who have been previously treated with fluoropyrimidine, oxaliplatin and irinotecan based chemotherapy etc. and improved overall survival. Here we showed the efficacy of FTD in CD44 and CD133 high expressing (CD44high/CD133high) cancer cells which has CSC like property.
Method: CD44high /CD133high and CD44low /CD133low DLD-1 cells were separated by Fluorescence-Activated Cell Sorting (FACS) and subjected to sphere formation assay. Anti-proliferative and anti-sphere forming effects of FTD in CD44high /CD133high cells were measured. Then, 150 days FTD long exposed colorectal cell line's CSC markers CD44 and CD133 were measured by flow cytometry and its tumor initiating property in in vitro and in vivo were evaluated.
Results: CD44 high /CD133 high DLD-1 cells formed much more sphere than CD44low /CD133low cells significantly. Compared to unsorted cells, CD44high /CD133high cells displayed 5-FU resistance (IC50 value of 5-FU for unsorted and CD44 high /CD133 high cells were 2.5 μM and 5.5 μM respectively) but not FTD resistance (IC50 value of FTD for unsorted and CD44 high /CD133 high cells were 8.9 μM and 10.7 μM, respectively) in in vitro proliferation assay. In addition, FTD treatment in a subtoxic concentration 1 μM for DLD-1 cells disrupted sphere formation. FTD-long exposed DLD-1 cell lines showed decreased CD44high /CD133high population compared to its parental cell line from 11.3% to 0.7%, and showed decreased sphere-forming efficacy. In addition, FTD-long exposed DLD-1 cell lines decreased tumor forming potential in in vivo. These results suggest that FTD is effective for CSC like cells and that long exposure to FTD might lead CSC depletion.
Conclusion: FTD was proved to be effective for CSC like CD44high /CD133high cells. It suggests that FTD might be useful for CSC targeted chemotherapy in case of CD44 and CD133 are highly expressed subtype of tumors.
Citation Format: Kenta Tsunekuni, Masamitsu Konno, Jun Koseki, Ayumu Asai, Yuichiro Doki, Masaki Mori, Hideshi Ishii. Trifluridine efficacy in cancer stem cell [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 2890.
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Affiliation(s)
| | - Masamitsu Konno
- 2Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Jun Koseki
- 2Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ayumu Asai
- 2Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yuichiro Doki
- 2Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Masaki Mori
- 2Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hideshi Ishii
- 2Graduate School of Medicine, Osaka University, Osaka, Japan
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25
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Toshiyama R, Konno M, Eguchi H, Asai A, Noda T, Koseki J, Asukai K, Ohashi T, Matsushita K, Iwagami Y, Yamada D, Asaoka T, Wada H, Kawamoto K, Gotoh K, Kudo T, Satoh T, Doki Y, Mori M, Ishii H. Association of iron metabolic enzyme hepcidin expression levels with the prognosis of patients with pancreatic cancer. Oncol Lett 2018; 15:8125-8133. [PMID: 29731920 DOI: 10.3892/ol.2018.8357] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 02/21/2018] [Indexed: 12/11/2022] Open
Abstract
Hepcidin and ferroportin, which are known as key iron regulators, may be used in future treatments of pancreatic ductal adenocarcinoma. Iron is essential for life support; it helps oxygen molecules bind to hemoglobin and acts as an important catalytic enzyme center. However, iron overload is a risk factor for cancer, possibly through the generation of reactive oxygen species (ROS). Hepcidin, which is a peptide hormone mainly generated by the liver, inhibits iron absorption via enterocytes and iron release from macrophages. Notably, hepcidin regulates iron homeostasis in the body by regulating the iron transporter ferroportin. In the present study, it was assumed that high hepcidin expression and low ferroportin expression result in malignancy. Therefore, it was examined whether hepcidin and ferroportin expression levels were correlated with the prognosis of pancreatic cancer in patients. Results revealed that high hepcidin expression levels and low ferroportin expression levels in pancreatic cancer tissue were significantly associated with poor prognosis in the analyses of overall survival (P=0.0140 and 0.0478, respectively). Additionally, there was no significant difference in disease-free survival in the hepcidin- and ferroportin-staining groups. Hepcidin expression correlated with the pathological stage and vascular invasion (P=0.0493 and 0.0400, respectively), and ferroportin expression was correlated with age (P=0.0372). Multivariate analysis of overall survival in the hepcidin-staining group revealed that pathological N factor (pN), adjuvant chemotherapy, and hepcidin expression were independent prognostic factors (P=0.0450, 0.0002, and 0.0049, respectively). Similarly, multivariate analysis of overall survival in the ferroportin-staining group revealed that vascular invasion, and ferroportin expression were independent prognostic factors (P=0.0028, P<0.0001, and P=0.0056, respectively). Thus, hepcidin and ferroportin expressions might be novel prognostic indicators for pancreatic cancer.
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Affiliation(s)
- Reishi Toshiyama
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Takehiro Noda
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Jun Koseki
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kei Asukai
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tomofumi Ohashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Katsunori Matsushita
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yoshifumi Iwagami
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Daisaku Yamada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tadafumi Asaoka
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Wada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kunihito Gotoh
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Toshihiro Kudo
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hideshi Ishii
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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Nishizawa Y, Konno M, Asai A, Koseki J, Kawamoto K, Miyoshi N, Takahashi H, Nishida N, Haraguchi N, Sakai D, Kudo T, Hata T, Matsuda C, Mizushima T, Satoh T, Doki Y, Mori M, Ishii H. Oncogene c-Myc promotes epitranscriptome m 6A reader YTHDF1 expression in colorectal cancer. Oncotarget 2018; 9:7476-7486. [PMID: 29484125 PMCID: PMC5800917 DOI: 10.18632/oncotarget.23554] [Citation(s) in RCA: 172] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/28/2017] [Indexed: 12/20/2022] Open
Abstract
Recent studies that have emerged on the diversity of RNA modification in tumors suggest their eligibility as bona fide targets in diagnosis and drug discovery. N6-methyladenosine (m6A) was first reported and is most common in epitranscriptome modification of various RNAs. The YT521-B homology (YTH) domain family are representative m6A-binding proteins, but how the YTH domain family is involved in cancer remains to be clearly understood. Given that clinical sequence data in colorectal cancer indicate that overexpression of YTHDF1 is outstanding among other family members, we studied the role of Ythdf1 and the transcriptional control of YTHDF1. Immunostaining of Ythdf1 showed that its expression was associated with various malignant tumor behaviors, such as depth, lymph node metastasis, and poorer cancer stages. The study of patient survival indicated that patients with high Ythdf1 expression had significantly poorer overall survival. The results indicated that Ythdf1 expression is an independent prognostic factor of patients. The in vitro study showed that the knockdown of YTHDF1 resulted in the suppression of cancer proliferation and sensitization to the exposure of anticancer drugs such as fluorouracil and oxaliplatin. Importantly, the study upstream of the YTHDF1 gene indicated that an oncogenic transcription factor c-Myc was associated with YTHDF1 in both expression and chromatin immunoprecipitation data. Moreover, the knockdown experiments of c-Myc showed the inhibition of YTHDF1, supporting a notion of c-Myc-driven YTHDF1 axis significance. These data suggest that m6A reader Ythdf1 plays a significant role in colorectal cancer progression.
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Affiliation(s)
- Yujiro Nishizawa
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Jun Koseki
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Norikatsu Miyoshi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hidekazu Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Naohiro Nishida
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Naotsugu Haraguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Daisuke Sakai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Toshihiro Kudo
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Taishi Hata
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Chu Matsuda
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tsunekazu Mizushima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Therapeutics for Inflammatory Bowel Diseases, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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Konno M, Matsui H, Koseki J, Asai A, Kano Y, Kawamoto K, Nishida N, Sakai D, Kudo T, Satoh T, Doki Y, Mori M, Ishii H. Computational trans-omics approach characterised methylomic and transcriptomic involvements and identified novel therapeutic targets for chemoresistance in gastrointestinal cancer stem cells. Sci Rep 2018; 8:899. [PMID: 29343747 PMCID: PMC5772492 DOI: 10.1038/s41598-018-19284-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 12/27/2017] [Indexed: 12/13/2022] Open
Abstract
We investigated the relationship between methylomic [5-methylation on deoxycytosine to form 5-methylcytosine (5mC)] and transcriptomic information in response to chemotherapeutic 5-fluorouracil (5-FU) exposure and cisplatin (CDDP) administration using the ornithine decarboxylase (ODC) degron-positive cancer stem cell model of gastrointestinal tumour. The quantification of 5mC methylation revealed various alterations in the size distribution and intensity of genomic loci for each patient. To summarise these alterations, we transformed all large volume data into a smooth function and treated the area as a representative value of 5mC methylation. The present computational approach made the methylomic data more accessible to each transcriptional unit and allowed to identify candidate genes, including the tumour necrosis factor receptor-associated factor 4 (TRAF4), as novel therapeutic targets with a strong response to anti-tumour agents, such as 5-FU and CDDP, and whose significance has been confirmed in a mouse model in vivo. The present study showed that 5mC methylation levels are inversely correlated with gene expression in a chemotherapy-resistant stem cell model of gastrointestinal cancer. This mathematical method can be used to simultaneously quantify and identify chemoresistant potential targets in gastrointestinal cancer stem cells.
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Affiliation(s)
- Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, 565-0871, Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Hidetoshi Matsui
- Faculty of Data Science, Shiga University, Shiga, 522-8522, Japan
| | - Jun Koseki
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, 565-0871, Japan.,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Yoshihiro Kano
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, 565-0871, Japan.,Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Naohiro Nishida
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Daisuke Sakai
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, 565-0871, Japan
| | - Toshihiro Kudo
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, 565-0871, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, 565-0871, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan.
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan.
| | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, 565-0871, Japan. .,Department of Medical Data Science, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan.
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28
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Ohashi T, Eguchi H, Kawamoto K, Konno M, Asai A, Colvin H, Ueda Y, Takaoka H, Iwagami Y, Yamada D, Asaoka T, Noda T, Wada H, Gotoh K, Kobayashi S, Koseki J, Satoh T, Ogawa K, Doki Y, Mori M, Ishii H. Mitochondrial pyruvate carrier modulates the epithelial-mesenchymal transition in cholangiocarcinoma. Oncol Rep 2017; 39:1276-1282. [PMID: 29286150 DOI: 10.3892/or.2017.6172] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/17/2017] [Indexed: 11/05/2022] Open
Abstract
Intrahepatic cholangiocarcinoma (ICC) is known to have a high malignant potential. Because of its high recurrence rate, ICC has a poor prognosis even after complete tumor resection. Compared with normal differentiated cells, cancer cells have an altered metabolism for supporting their survival in severe conditions. Cancer cells acquire additional malignant potential as a result of this metabolic alteration. Thus, the molecules known to be involved in cancer metabolism, could be novel therapeutic targets. The mitochondrial pyruvate carrier (MPC) is a recently discovered pyruvate transporter, which is located in the mitochondrial inner membrane. Although MPC is composed of two subunits, it has been reported that the MPC1 subunit is specifically associated with poor prognosis in several cancers, including colorectal and prostate cancer. However, only a few studies have assessed the clinical significance of MPC1 and the molecular mechanisms underlying its influence on cancer progression are not well understood. This study aimed to clarify the function of MPC1 that affects the malignant potential of ICC. The expression of MPC1 in ICC clinical specimens was determined by immunohistochemistry. In addition, the correlations between MPC1 expression and the survival rate, as well as various clinicopathological parameters were assessed. Low MPC1 expression correlated with poor ICC prognosis and was correlated with tumor invasion and distant metastasis. Both these phenomena are closely associated with the epithelial-mesenchymal transition (EMT). Therefore, we investigated the impact of altering the MPC1 gene expression on the malignant potential of cancer cells using biliary tract cancer cell lines in vitro. The expression of MPC1 was downregulated in the cells induced to undergo EMT following treatment with TGF-β. Furthermore, the inhibition of MPC1 expression induced EMT in cancer cells, and the overexpression of MPC1 suppressed the migration of tumor cells. These results indicated that MPC1 could be a novel therapeutic target in some cancers.
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Affiliation(s)
- Tomofumi Ohashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hugh Colvin
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuji Ueda
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hirofumi Takaoka
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yoshifumi Iwagami
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Daisaku Yamada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tadafumi Asaoka
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Takehiro Noda
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Wada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kunihito Gotoh
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Shogo Kobayashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Jun Koseki
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kazuhiko Ogawa
- Department of Radiation Oncology, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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Nishizawa Y, Konno M, Asai A, Koseki J, Kawamoto K, Miyoshi N, Takahashi H, Nishida N, Haraguchi N, Sakai D, Kudo T, Hata T, Matsuda C, Mizushima T, Satoh T, Doki Y, Mori M, Ishii H. Hypoxia stimulates the cytoplasmic localization of oncogenic long noncoding RNA LINC00152 in colorectal cancer. Int J Oncol 2017; 52:453-460. [PMID: 29345294 DOI: 10.3892/ijo.2017.4218] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 10/19/2017] [Indexed: 11/05/2022] Open
Abstract
Recent studies have indicated that long noncoding RNAs (lncRNAs) play a pivotal role in almost all physiological cellular processes, including every stage of cancer development. Given that hypoxia in the tumor microenvironment is involved in the malignant behavior of tumors, such as invasion and metastasis, we investigated the cytoplasmic and nuclear localization of lncRNAs in colorectal cancer cells. A cell culture under hypoxic conditions revealed several lncRNAs, such as LINC00152, whose levels were increased in the cytoplasm of colorectal cancer cells. A database study indicated that LINC00152 shares microRNA-binding sites, such as miR-138 and miR-193, with the hypoxia-inducible factor 1 (HIF1), thus suggesting that LINC00152 could possibly function as a competing endogenous RNA that can augment Hif1 translation in the cytoplasm of hypoxic colorectal cancer cells. Moreover, the data presented in the studies of surgically resected samples showed that patients with colorectal cancer exhibiting high LINC00152 expression were associated with a worsened survival rate; this supports the suggested oncogenic function of LINC00152 in the cytoplasm under hypoxic conditions. The present study demonstrated that lncRNA networks could provide diagnostic tools and novel therapeutic targets against colorectal cancer cells.
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Affiliation(s)
- Yujiro Nishizawa
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Jun Koseki
- Department of Disease Data Science, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Norikatsu Miyoshi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hidekazu Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naohiro Nishida
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naotsugu Haraguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Daisuke Sakai
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Toshihiro Kudo
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Taishi Hata
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Chu Matsuda
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tsunekazu Mizushima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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30
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Taketo K, Konno M, Asai A, Koseki J, Toratani M, Satoh T, Doki Y, Mori M, Ishii H, Ogawa K. The epitranscriptome m6A writer METTL3 promotes chemo- and radioresistance in pancreatic cancer cells. Int J Oncol 2017; 52:621-629. [PMID: 29345285 DOI: 10.3892/ijo.2017.4219] [Citation(s) in RCA: 180] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 10/16/2017] [Indexed: 11/06/2022] Open
Abstract
N6-methyladenosine (m6A) is the most abundant epitranscriptome modification in mammalian mRNA. Recent years have seen substantial progress in m6A epitranscriptomics, indicating its crucial roles in the initiation and progression of cancer through regulation of RNA stabilities, mRNA splicing, microRNA processing and mRNA translation. However, by what means m6A is dynamically regulated or written by enzymatic components represented by methyltransferase-like 3 (METTL3) and how m6A is significant for each of the numerous genes remain unclear. We focused on METTL3 in pancreatic cancer, the prognosis of which is not satisfactory despite the development of multidisciplinary therapies. We established METTL3-knockdown pancreatic cancer cell line using short hairpin RNA. Although morphologic and proliferative changes were unaffected, METTL3-depleted cells showed higher sensitivity to anticancer reagents such as gemcitabine, 5-fluorouracil, cisplatin and irradiation. Our data suggest that METTL3 is a potent target for enhancing therapeutic efficacy in patients with pancreatic cancer. In addition, we performed cDNA expression analysis followed by gene ontology and protein-protein interaction analysis using the Database for Annotation, Visualization, and Integrated Discovery and Search Tool for the Retrieval of Interacting Genes/Proteins databases, respectively. The results demonstrate that METTL3 was associated with mitogen-activated protein kinase cascades, ubiquitin-dependent process and RNA splicing and regulation of cellular process, suggesting functional roles and targets of METTL3.
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Affiliation(s)
- Kosuke Taketo
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Masamitsu Konno
- Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Ayumu Asai
- Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Jun Koseki
- Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Masayasu Toratani
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Taroh Satoh
- Department of Cancer Frontier Science, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Hideshi Ishii
- Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Kazuhiko Ogawa
- Department of Radiation Oncology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
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31
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Tsunekuni K, Koseki J, Konno M, Asai A, Nishida N, Colvin H, Kawamoto K, Doki Y, Mori M, Ishii H. Abstract 3075: Analysis of microRNA profiles involved in the resistance to trifluridine. Cancer Res 2017. [DOI: 10.1158/1538-7445.am2017-3075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Trifluridine (FTD) is a key component of the novel oral antitumor drug trifluridine/tipiracil, which was approved for the treatment of patients with metastatic colorectal cancer refractory to standard chemotherapies. A comprehensive analysis of miRNA profiles was performed in cell lines resistant to FTD established by ourselves, in order to explore the underlying mechanisms of resistance to the drug.
Method: We established subline resistance to FTD through continuous administration and increasing dose of the drug for 5 months using the colorectal cancer cell line DLD-1. Total RNA was extracted at intervals whilst establishing FTD resistant sublines, and miRNA expression was analyzed by microarray. The expression of miRNA that was significantly downregulated in the FTD resistant subline was knocked down to test its involvement in resistance to FTD. Cell viability was evaluated by crystal violet cytotoxicity test.
Results: The established FTD-resistant sublines showed more than 22-fold higher resistance to FTD and no cross-resistance to 5-FU. miRNA and mRNA clustered in the genome locus located in chromosome 9, 9p22.32 were downregulated in the FTD-resistant cell line, one of which was the miRNA let-7d-5p, which is one of the let-7 family and is known to target oncogenes and several key components of the cell cycle and cell proliferation. Anti-let-7d-5p treated DLD-1 was less sensitive to FTD than compared to control. The IC50 values of FTD were 16.8 µM and 7.6 µM for the anti-let-7d-5p treated cells and control respectively. On the other hand, overexpression of let-7d-5p in DLD-1 using let-7d-5p mimic increased the sensitivity to FTD compared to control. The IC50 values of FTD were 3.7 µM and 13.9 µM in the let-7d-5p overexpression cells and control respectively. 5FU sensitivity was only altered slightly in anti- let-7d-5p treated or let-7d-5p mimic treated cells. These data suggest that let-7d-5p is more relevant to sensitivity for FTD than that of 5FU.
Conclusion: Let-7d-5p expression level influenced FTD sensitivity more effectively than 5FU. It suggests that the let-7d-5p is a potential predictive marker for trifluridine/tipiracil treatment in the clinical setting.
Citation Format: Kenta Tsunekuni, Jun Koseki, Masamitsu Konno, Ayumu Asai, Norihiro Nishida, Hugh Colvin, Koichi Kawamoto, Yuichiro Doki, Masaki Mori, Hideshi Ishii. Analysis of microRNA profiles involved in the resistance to trifluridine [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 3075. doi:10.1158/1538-7445.AM2017-3075
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Asukai K, Kawamoto K, Eguchi H, Konno M, Asai A, Iwagami Y, Yamada D, Asaoka T, Noda T, Wada H, Gotoh K, Nishida N, Satoh T, Doki Y, Mori M, Ishii H. Micro-RNA-130a-3p Regulates Gemcitabine Resistance via PPARG in Cholangiocarcinoma. Ann Surg Oncol 2017; 24:2344-2352. [PMID: 28560603 DOI: 10.1245/s10434-017-5871-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND The prognosis of cholangiocarcinoma (CCA) is so poor that its chemoresistance needs to be reduced. In this study, we focused on the microRNAs (miRNAs) associated with gemcitabine resistance of CCA and assessed the clinical significance of miRNAs and their target genes. METHODS We performed miRNA microarray analysis for two CCA cell lines (CCLP-1 and MzChA-1) and their gemcitabine-resistant (GR) cells. An miR-130a-3p mimic was induced into CCA cells using lipofection, and we used pioglitazone as a peroxisome proliferator-activated receptor-γ (PPARγ) agonist in vitro. The expression of miR-130a-3p was studied in 27 intrahepatic CCA samples after laser capture microdissection (LCM) and by immunohistochemistry from patients who had undergone curative resection from March 2004 to November 2012 at Osaka University Hospital. RESULTS miR-130a-3p expression was upregulated in CCLP-1-GRs and MzChA-1-GRs significantly more than in their parental cells. Transfection of the miR-130a-3p mimic into CCA cells increased gemcitabine resistance, and we detected PPARG as a target gene of miR-130a-3p. Furthermore, pioglitazone had a synergistic effect with gemcitabine and alleviated gemcitabine resistance of CCA GR cells. Moreover, clinical examination revealed that for patients who underwent adjuvant gemcitabine therapy, those who were PPARγ positive had significantly longer disease-free survival than those who were PPARγ negative (n = 5 and 11, respectively; p = 0.027). CONCLUSIONS Our data suggest that miR-130a-3p was associated with gemcitabine resistance in CCA through PPARG, and there is a possibility that pioglitazone can be used for the treatment of CCA.
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Affiliation(s)
- Kei Asukai
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Ayumu Asai
- Department of Cancer Profiling Discovery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yoshifumi Iwagami
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Daisaku Yamada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tadafumi Asaoka
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Takehiro Noda
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hiroshi Wada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Kunihito Gotoh
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Naohiro Nishida
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
| | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan. .,Department of Cancer Profiling Discovery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
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Tsunekuni K, Konno M, Asai A, Koseki J, Kobunai T, Takechi T, Doki Y, Mori M, Ishii H. MicroRNA profiles involved in trifluridine resistance. Oncotarget 2017; 8:53017-53027. [PMID: 28881790 PMCID: PMC5581089 DOI: 10.18632/oncotarget.18078] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 05/09/2017] [Indexed: 12/25/2022] Open
Abstract
Trifluridine (FTD) is a key component of the novel oral antitumor drug trifluridine/tipiracil, which is approved for the treatment of patients with metastatic colorectal cancer refractory to standard chemotherapies. A microRNA analysis of three colorectal cell lines was conducted to investigate causes of FTD resistance. Drug resistant sublines of DLD-1, HCT-116, and RKO cells were developed by continuous administration of increasing doses of FTD for 5 months. The let-7d-5p gene, which maps to chromosome 9q22.32, was downregulated in the FTD-resistant DLD-1 sublines. DLD-1 cells became more resistant to FTD when let-7d-5p was knocked down and more sensitive when let-7d-5p was overexpressed. The FTD-resistant sublines were not cross-resistant to 5-fluorouracil (5-FU); 5-FU sensitivity was affected only slightly when let-7d-5p as overexpressed or knocked down. These data indicate that let-7d-5p increases sensitivity of FTD but not 5-FU and that let-7d-5p is a potential clinical marker of treatment sensitivity.
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Affiliation(s)
- Kenta Tsunekuni
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Translational Research Laboratory, Taiho Pharmaceutical Co, Ltd, Tokushima City, Tokushima, 771-0194, Japan
| | - Masamitsu Konno
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Ayumu Asai
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Frontier Science for Cancer and Chemotherapy, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Jun Koseki
- Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Takashi Kobunai
- Translational Research Laboratory, Taiho Pharmaceutical Co, Ltd, Tokushima City, Tokushima, 771-0194, Japan
| | - Teiji Takechi
- Translational Research Laboratory, Taiho Pharmaceutical Co, Ltd, Tokushima City, Tokushima, 771-0194, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Hideshi Ishii
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Department of Medical Data Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
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34
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Konno M, Asai A, Kawamoto K, Nishida N, Satoh T, Doki Y, Mori M, Ishii H. The one-carbon metabolism pathway highlights therapeutic targets for gastrointestinal cancer (Review). Int J Oncol 2017; 50:1057-1063. [PMID: 28259896 DOI: 10.3892/ijo.2017.3885] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 12/22/2016] [Indexed: 11/05/2022] Open
Abstract
After the initial use of anti-folates for treatment of malignancies, folate metabolism has emerged as a rational diagnostic and therapeutic target in gastrointestinal cancer. The one-carbon metabolic pathway, which comprises three critical reactions (i.e., folate and methionine cycles), underlies this effect in conjunction with the trans-sulfuration pathway. Understanding of the one-carbon metabolism pathway has served to unravel the link between the causes and effects of cancer phenotypes leading to several seminal discoveries such as that of diadenosine tri-phosphate hydrolase, microRNAs, 5-FU and, more recently, trifluridine. In the folate cycle, glycine and serine fuel the mitochondrial enzymes SHMT2, MTHFD2 and ALDH1L2, which play critical roles in the cancer survival and proliferation presumably through purine production. In the methionine cycle, S-adenocyl methionine serves hydrocarbons and polyamines that are critical for the epigenetic controls. The trans-sulfuration pathway is a critical component in the synthesis of glutathione, which is involved in the production of reactive oxygen species in cancer stem cells. Therefore, characterization of one-carbon metabolism is indispensable to the development of precision medicine in the context of cancer diagnostics and therapeutics. In the present study, we review the historical issues associated with one-carbon metabolism and highlight the recent advances in cancer research.
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Affiliation(s)
- Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka 565-0871, Japan
| | - Ayumu Asai
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka 565-0871, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Naohiro Nishida
- Department of Gastroenterological Surgery Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka 565-0871, Japan
| | - Yuichiro Doki
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka 565-0871, Japan
| | - Masaki Mori
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka 565-0871, Japan
| | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka 565-0871, Japan
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Asai A, Shuto Y, Nagao M, Miyazawa T, Sugihara H, Oikawa S. Antiatherogenic effect of metformin in two mouse lines with different susceptibility to glucose intolerance. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nishizawa Y, Nishida N, Konno M, Kawamoto K, Asai A, Koseki J, Takahashi H, Haraguchi N, Nishimura J, Hata T, Matsuda C, Mizushima T, Satoh T, Doki Y, Mori M, Ishii H. Clinical Significance of Histone Demethylase NO66 in Invasive Colorectal Cancer. Ann Surg Oncol 2016; 24:841-849. [DOI: 10.1245/s10434-016-5395-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Indexed: 01/06/2023]
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Umegaki H, Asai A, Kanda S, Maeda K, Shimojima T, Nomura H, Kuzuya M. Risk Factors for the Discontinuation of Home Medical Care among Low-functioning Older Patients. J Nutr Health Aging 2016; 20:453-7. [PMID: 26999247 DOI: 10.1007/s12603-015-0606-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Older patients receiving home medical care often have declining functional status and multiple disease conditions. It is important to identify the risk factors for care transition events in this population in order to avoid preventable transitions. In the present study, therefore, we investigated the factors associated with discontinuation of home medical care as a potentially preventable care transition event in older patients. METHODS Baseline data for participants in the Observational study of Nagoya Elderly with HOme MEdical (ONEHOME) study and data on the mortality, institutionalization, or hospitalisation of the study participants during a 2-year follow-up period were used. Discontinuation of home care was defined as admission to a hospital for any reason, institutionalization, or death. Univariate and multivariate Cox hazard models were used to assess the association of each of the factors with the discontinuation of home care during the observational period. The covariates included in the multivariate analysis were those significantly associated with the discontinuation of home care at the level of P<0.05 in the univariate analysis. RESULTS The univariate Cox hazard model revealed that a low hemoglobin level (< 11g/dL), low serum albumin level (< 3g/dL), higher Charlson Comorbidity Index score, and low Mini Nutritional Assessment Short Form score (< 7) were significantly associated with the discontinuation of home care. A multivariate Cox hazard model including these four factors demonstrated that all four were independently associated with home-care discontinuation. CONCLUSIONS The present results demonstrated that anemia, hypoalbuminemia, malnourishment, and the presence of serious comorbidities were associated with the discontinuation of home medical care among low-functioning older patients.
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Affiliation(s)
- H Umegaki
- Hiroyuki Umegaki, Nagoya University Graduate School of Medicine, Department of Community Healthcare and Geriatrics, 65 Tsuruma-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan, Phone: +81-52-744-2364; Fax: +81-52-744-2371; Email address:
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Asai A, Okuda T, Yamauchi T, Sugiura Y, Okamoto H. Safety Evaluation of Dry Powder Formulations by Direct Dispersion onto Air-Liquid Interface Cultured Cell Layer. Biol Pharm Bull 2016; 39:368-77. [PMID: 26754254 DOI: 10.1248/bpb.b15-00791] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Most safety evaluations of dry powder inhalers (DPIs) using cultured cells have been performed with dry powder formulations dissolved in a medium. However, this method is not considered to be suitable to evaluate the safety of inhaled dry powder formulations correctly since it cannot reflect the actual phenomenon on the respiratory epithelial surface. In this study, we established a novel in-vitro safety evaluation system suitable for DPIs by combining an air-liquid interface cultured cell layer and a device for dispersing dry powders, and evaluated the safety of candidate excipients of dry powders for inhalation. The safety of excipients (sugars, amino acids, cyclodextrins, and positive controls) in solutions was compared using submerged cell culture systems with a conventional 96-well plate and Transwell(®). The sensitivity of the cells grown in Transwell(®) was lower than that of those grown in the 96-well plate. Dry powders were prepared by spray-drying and we evaluated their safety with a novel in-vitro safety evaluation system using an air-liquid interface cultured cell layer. Dry powders decreased the cell viability with doses more than solutions. On the other hand, dissolving the dry powders attenuated their cytotoxicity. This suggested that the novel in-vitro safety evaluation system would be suitable to evaluate the safety of DPIs with high sensitivity.
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Asai A, Okuda T, Sonoda E, Yamauchi T, Kato S, Okamoto H. Drug Permeation Characterization of Inhaled Dry Powder Formulations in Air-Liquid Interfaced Cell Layer Using an Improved, Simple Apparatus for Dispersion. Pharm Res 2015; 33:487-97. [PMID: 26490362 DOI: 10.1007/s11095-015-1804-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 09/30/2015] [Indexed: 10/22/2022]
Abstract
PURPOSE An improved, simple apparatus was developed to easily and uniformly disperse dry powders onto an air-liquid interfaced cultured cell layer. We investigated drug permeation in cell cultures with access to the air-liquid interface (ALI) following deposition of a dry powder using the apparatus. METHOD The improved apparatus for dispersing the powders was assembled. Dry powders containing model drugs were prepared and dispersed onto the cell layer with ALI. After the dispersion, the permeation of each model drug was measured and compared with other samples (solutions with the same compositions). RESULTS The improved apparatus could with ease uniformly disperse 40% of the loading dose onto the cell layer with ALI. Dry powders showed higher drug permeability compared to the samples. without cytotoxicity or an effect on tight junctions. The high drug permeability of dry powders was independent of the molecular weight of model drugs. The contribution of active transport was small, while an increase in passive drug transport via trans- and paracellular routes was observed. CONCLUSIONS Inhaled dry powder formulations achieved higher drug permeability than their solution formulations in ALI. A high local concentration of drugs on the cell layer, caused by direct attachment of the inhaled dry powder, contributed to increased drug permeability via both trans- and paracellular routes.
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Affiliation(s)
- Ayumu Asai
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Tomoyuki Okuda
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Erina Sonoda
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Tomoyo Yamauchi
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Saki Kato
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Hirokazu Okamoto
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan.
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Iwata R, Asai A, Oshige H, Yoshimura K, Nonaka M, Nakano I. IT-14 * MESENCHYMAL GLIOMA STEM CELL EXPRESS ICOSL. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou258.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Iwata R, Asai A, Ito T, Oshige H, Yoshimura K, Nonaka M. CN-08 * THERAPEUTIC CONCENTRATION OF TEMOZOLOMIDE DO NOT IMPAIR THE FUNCTION OF HUMAN DENDRITIC CELL SUBSETS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou243.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ogo N, Sawada J, Ishikawa Y, Matsuno K, Hashimoto A, Asai A. 274 Novel cysteine derivatives for the next generation anticancer agents acting on KSP. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70400-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Nonaka M, Okita Y, Kanemura Y, Goto H, Kamei T, Iwata R, Takeda J, Oshige H, Yoshimura K, Asai A. NT-27 * SURGICAL RESECTION OF THALAMIC MALIGNANT GLIOMA. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou265.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Asai A, Iwata R, Ito T, Oshige H, Yoshimura K, Takeda JI. EFFECT OF TEMOZOMIDE ON HUMAN DENDRITIC CELLS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou209.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kitai R, Ueno S, Maehara H, Shirakawa S, Katoda M, Hada Y, Tomita Y, Hayashi H, Asai A, Isobe H, Goto H, Yamashita S. The Digital Database of Long-Term Solar Chromospheric Variation. Data Sci J 2013. [DOI: 10.2481/dsj.wds-037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Oikawa S, Okajima F, Asai A, Ishigaki Y, Oka Y, Kono S, Sasaki J, Sugihara H, Nakagawa K, Miyazawa T. 268 THE EFFECT OF PITAVASTATIN AND PRAVASTATIN ON THE SERUM PHOSPHATIDYLCHOLINE HYDROPEROXIDE (PCOOH) CONCENTRATION. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70269-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tanimura K, Nagao M, Mariko S, Harada T, Nakajima Y, Okajima F, Asai A, Kotake H, Shinichi O. Abstract: P932 SERUM APOB48 LEVELS ARE ELEVATED IN METABOLIC SYNDROME AND DIABETES MELLITUS. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71053-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
The ageing population means that dementia is a serious social problem in Japan. Attitudes toward ageing in Japan are increasingly negative, and views of life and death among older people vary. Numerous ethical problems exist in the medical treatment of dementia. Amidst such conditions, it is important and beneficial to examine films that depict demented patients and to consider the issues raised by these films. Through film we see many aspects of a country and its times: culture and ideology, morality and religion, medical treatments, views on life and death, social conditions and what issues are viewed as problems. The best films both entertain audiences and provide viewers with opportunities to think about social problems. In the past 30 years, 10 films about dementia had been made in Japan and two of these-The Twilight Years (Kôkotsu no hito) and Memories of Tomorrow (Ashita no kioku) are the main focus of this paper. In our analysis we consider three points: how the patients are informed of their disease, the characters' wishes for death, and terminal medical care.
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Affiliation(s)
- A Asai
- Department of Bioethics, Kumamoto University Graduate School of Medical Science, Kumamoto University, Honjo, Kumamoto, Japan
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Abstract
Clinical ethics support, including ethics consultation, has become established in the field of medical practice throughout the world. This practice has been regarded as useful, most notably in the UK and the USA, in solving ethical problems encountered by both medical practitioners and those who receive medical treatment. In Japan, however, few services are available to respond to everyday clinical ethical issues, although a variety of difficult ethical problems arise daily in the medical field: termination of life support, euthanasia and questions about patient autonomy. In light of these conditions, a group of 17 volunteer educators and researchers from the area of biomedical ethics, including the authors, have formed the Clinical Ethics Support and Education Project, and began providing Japan's first small team clinical ethics consultation service in October, 2006. Members include scholars of biomedical ethics, scholars of philosophy and ethics, legal professionals and legal scholars, nurses and doctors, consisting of five women and 12 men. Consultation teams, made up of a small number of members, were organised each time a request for consultation was received. Over approximately 15 months (October 2006-December 2007), the programme received 22 consultation requests from medical practitioners and medical institutions, and three from the families of patients. In this paper, we will discuss the status of our consultation service and examples of consultation cases we have handled. In addition, we will examine the process of evaluating small team clinical ethics consultation services, as well as the strengths and weakness of such programmes.
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Affiliation(s)
- M Fukuyama
- Department of Bioethics, Kumamoto University Graduate School of Medical Science, Kumamoto, Japan
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Kushida S, Takemoto T, Kakudo N, Uesaka T, Asai A, Kusumoto K. P.248 Subperiosteal hematoma of the orbit with bone resorption. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)72036-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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