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Huang J, Meng Q, Liu R, Li H, Li Y, Yang Z, Wang Y, Wanyan C, Yang X, Wei J. The development of radioresistant oral squamous carcinoma cell lines and identification of radiotherapy-related biomarkers. Clin Transl Oncol 2023; 25:3006-3020. [PMID: 37029240 DOI: 10.1007/s12094-023-03169-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 03/21/2023] [Indexed: 04/09/2023]
Abstract
BACKGROUND In the treatment of oral squamous cell carcinoma (OSCC), radiation resistance remains an important obstacle to patient outcomes. Progress in understanding the molecular mechanisms of radioresistance has been limited by research models that do not fully recapitulate the biological features of solid tumors. In this study, we aimed to develop novel in vitro models to investigate the underlying basis of radioresistance in OSCC and to identify novel biomarkers. METHODS Parental OSCC cells (SCC9 and CAL27) were repeatedly exposed to ionizing radiation to develop isogenic radioresistant cell lines. We characterized the phenotypic differences between the parental and radioresistant cell lines. RNA sequencing was used to identify differentially expressed genes (DEGs), and bioinformatics analysis identified candidate molecules that may be related to OSCC radiotherapy. RESULTS Two isogenic radioresistant cell lines for OSCC were successfully established. The radioresistant cells displayed a radioresistant phenotype when compared to the parental cells. Two hundred and sixty DEGs were co-expressed in SCC9-RR and CAL27-RR, and thirty-eight DEGs were upregulated or downregulated in both cell lines. The associations between the overall survival (OS) of OSCC patients and the identified genes were analyzed using data from the Cancer Genome Atlas (TCGA) database. A total of six candidate genes (KCNJ2, CLEC18C, P3H3, PIK3R3, SERPINE1, and TMC8) were closely associated with prognosis. CONCLUSION This study demonstrated the utility of constructing isogenic cell models to investigate the molecular changes associated with radioresistance. Six genes were identified based on the data from the radioresistant cells that may be potential targets in the treatment of OSCC.
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Affiliation(s)
- Junhong Huang
- College of Life Science, Northwest University, Xi'an, 710069, China
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - Qingzhe Meng
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
- School of Stomatology, Heilongjiang Key Lab of Oral Biomedicine Materials and Clinical Application & Experimental Center for Stomatology Engineering, Jiamusi University, Jiamusi, 154000, China
| | - Rong Liu
- College of Life Science, Northwest University, Xi'an, 710069, China
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - Huan Li
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - Yahui Li
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - Zihui Yang
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - Yan Wang
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - Chaojie Wanyan
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - Xinjie Yang
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China.
| | - Jianhua Wei
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, and Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China.
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Sato K, Yoshino H, Sato Y, Nakano M, Tsuruga E. ΔNp63 Regulates Radioresistance in Human Head and Neck Squamous Carcinoma Cells. Curr Issues Mol Biol 2023; 45:6262-6271. [PMID: 37623213 PMCID: PMC10453785 DOI: 10.3390/cimb45080394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/22/2023] [Accepted: 07/26/2023] [Indexed: 08/26/2023] Open
Abstract
Radiation therapy is commonly used to treat head and neck squamous cell carcinoma (HNSCC); however, recurrence results from the development of radioresistant cancer cells. Therefore, it is necessary to identify the underlying mechanisms of radioresistance in HNSCC. Previously, we showed that the inhibition of karyopherin-β1 (KPNB1), a factor in the nuclear transport system, enhances radiation-induced cytotoxicity, specifically in HNSCC cells, and decreases the localization of SCC-specific transcription factor ΔNp63. This suggests that ΔNp63 may be a KPNB1-carrying nucleoprotein that regulates radioresistance in HNSCC. Here, we determined whether ΔNp63 is involved in the radioresistance of HNSCC cells. Cell survival was measured by a colony formation assay. Apoptosis was assessed by annexin V staining and cleaved caspase-3 expression. The results indicate that ΔNp63 knockdown decreased the survival of irradiated HNSCC cells, increased radiation-induced annexin V+ cells, and cleaved caspase-3 expression. These results show that ΔNp63 is involved in the radioresistance of HNSCC cells. We further investigated which specific karyopherin-α (KPNA) molecules, partners of KPNB1 for nuclear transport, are involved in nuclear ΔNp63 expression. The analysis of nuclear ΔNp63 protein expression suggests that KPNA1 is involved in nuclear ΔNp63 expression. Taken together, our results suggest that ΔNp63 is a KPNB1-carrying nucleoprotein that regulates radioresistance in HNSCC.
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Affiliation(s)
- Kota Sato
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University, Hirosaki 036-8564, Aomori, Japan (Y.S.); (E.T.)
| | - Hironori Yoshino
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University, Hirosaki 036-8564, Aomori, Japan (Y.S.); (E.T.)
| | - Yoshiaki Sato
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University, Hirosaki 036-8564, Aomori, Japan (Y.S.); (E.T.)
| | - Manabu Nakano
- Department of Bioscience and Laboratory Medicine, Hirosaki University Graduate School of Health Sciences, Hirosaki 036-8564, Aomori, Japan;
| | - Eichi Tsuruga
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University, Hirosaki 036-8564, Aomori, Japan (Y.S.); (E.T.)
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3
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Sham NFR, Hasani NAH, Hasan N, Karim MKA, Fuad SBSA, Hasbullah HH, Ibahim MJ. Acquired radioresistance in EMT6 mouse mammary carcinoma cell line is mediated by CTLA-4 and PD-1 through JAK/STAT/PI3K pathway. Sci Rep 2023; 13:3108. [PMID: 36813833 PMCID: PMC9946948 DOI: 10.1038/s41598-023-29925-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 02/13/2023] [Indexed: 02/24/2023] Open
Abstract
Cancer recurrence is often associated with the acquisition of radioresistance by cancer tissues due to failure in radiotherapy. The underlying mechanism leading to the development of acquired radioresistance in the EMT6 mouse mammary carcinoma cell line and the potential pathway involved was investigated by comparing differential gene expressions between parental and acquired radioresistance cells. EMT6 cell line was exposed to 2 Gy/per cycle of gamma-ray and the survival fraction between EMT6-treated and parental cells was compared. EMT6RR_MJI (acquired radioresistance) cells was developed after 8 cycles of fractionated irradiation. The development of EMT6RR_MJI cells was confirmed with further irradiation at different doses of gamma-ray, and both the survival fraction and migration rates were measured. Higher survival fraction and migration rates were obtained in EMT6RR_MJI cells after exposure to 4 Gy and 8 Gy gamma-ray irradiations compared to their parental cells. Gene expression between EMT6RR_MJI and parental cells was compared, and 16 genes identified to possess more than tenfold changes were selected and validated using RT-PCR. Out of these genes, 5 were significantly up-regulated i.e., IL-6, PDL-1, AXL, GAS6 and APCDD1. Based on pathway analysis software, the development of acquired radioresistance in EMT6RR_MJI was hypothesized through JAK/STAT/PI3K pathway. Presently, CTLA-4 and PD-1 were determined to be associated with JAK/STAT/PI3K pathway, where both their expressions were significantly increased in EMT6RR_MJI compared to parental cells in the 1st, 4th and 8th cycle of radiation. As a conclusion, the current findings provided a mechanistic platform for the development of acquired radioresistance in EMT6RR_MJI through overexpression of CTLA-4 and PD-1, and novel knowledge on therapeutic targets for recurrent radioresistant cancers.
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Affiliation(s)
- Nur Fatihah Ronny Sham
- Faculty of Medicine, Jalan Hospital, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, 47000, Sungai Buloh, Selangor, Malaysia
| | - Narimah Abdul Hamid Hasani
- Faculty of Medicine, Jalan Hospital, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, 47000, Sungai Buloh, Selangor, Malaysia
| | - Nurhaslina Hasan
- Faculty of Dentistry, Jalan Hospital, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, 47000, Sungai Buloh, Selangor, Malaysia
| | | | - Syed Baharom Syed Ahmad Fuad
- Faculty of Medicine, Jalan Hospital, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, 47000, Sungai Buloh, Selangor, Malaysia
| | - Harissa Husainy Hasbullah
- Faculty of Medicine, Jalan Hospital, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, 47000, Sungai Buloh, Selangor, Malaysia
| | - Mohammad Johari Ibahim
- Faculty of Medicine, Jalan Hospital, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, 47000, Sungai Buloh, Selangor, Malaysia.
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Kuwahara Y, Tomita K, Habibi Roudkenar M, Mohammadi Roushandeh A, Sato T, Kurimasa A. The reversibility of cancer radioresistance: a novel potential way to identify factors contributing to tumor radioresistance. Hum Cell 2023; 36:963-971. [PMID: 36745313 DOI: 10.1007/s13577-023-00871-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 01/29/2023] [Indexed: 02/07/2023]
Abstract
To understand the molecular mechanisms responsible for radioresistance in cancer cells, we previously established clinically relevant radioresistant (CRR) cell lines from several human cancer cell lines. These CRR cells proliferate even under exposure to 2 Gy/day of X-rays for more than 30 days, which is a standard protocol for tumor radiotherapy. CRR cells received 2 Gy/day of X-rays to maintain their radioresistance (maintenance irradiation; MI). Interestingly, CRR cells that did not receive MI for more than a year lost their radioresistance, indicating that radiation-induced radioresistance is reversible. We designated these CRR-NoIR cells. Karyotyping of the parental and CRR cells revealed that the chromosomal composition of CRR cells is quite different from that of the parental cells. However, CRR and CRR-NoIR cells were more similar compared with the parental cells because CRR cells repair X-ray-induced DNA damage with higher fidelity. To identify the factor(s) involved in tumor radioresistance, previously published studies including ours have compared radioresistant cells to parental cells. In this review, we conclude that a comparison between CRR and CRR-NoIR cells, rather than parental cells, is the best way to identify factors involved in tumor radioresistance.
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Affiliation(s)
- Yoshikazu Kuwahara
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1, Fukumuro, Miyagino, Sendai, Miyagi, Japan.,Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan
| | - Kazuo Tomita
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan.
| | - Mehryar Habibi Roudkenar
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan.,Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Amaneh Mohammadi Roushandeh
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan.,Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Tomoaki Sato
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan.
| | - Akihiro Kurimasa
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1, Fukumuro, Miyagino, Sendai, Miyagi, Japan
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5
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Cannon A, Maher SG, Lynam-Lennon N. Generation and Characterization of an Isogenic Cell Line Model of Radioresistant Esophageal Adenocarcinoma. Methods Mol Biol 2023; 2645:139-152. [PMID: 37202615 DOI: 10.1007/978-1-0716-3056-3_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Radiation therapy is a cornerstone of cancer treatment worldwide. Unfortunately, in many cases, it does not control tumor growth, and many tumors display treatment resistance. The molecular pathways leading to treatment resistance in cancer have been subject to research for many years. Isogenic cell lines with divergent radiosensitivities are an extremely useful tool to study the molecular mechanisms that underpin radioresistance in cancer research, as they reduce the genetic variation that is present in patient samples and cell lines of different origin, thus allowing the elucidation of molecular determinants of radioresponse. Here, we describe the process of generating an in vitro isogenic model of radioresistant esophageal adenocarcinoma by chronic irradiation of esophageal adenocarcinoma cells with clinically relevant doses of X-ray radiation. We also characterize cell cycle, apoptosis, reactive oxygen species (ROS) production, DNA damage and repair in this model to investigate the underlying molecular mechanisms of radioresistance in esophageal adenocarcinoma.
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Affiliation(s)
- Aoife Cannon
- Department of Surgery, Trinity St. James's Cancer Institute, Trinity Translational Medicine Institute, Dublin, Ireland
| | - Stephen G Maher
- Department of Surgery, Trinity St. James's Cancer Institute, Trinity Translational Medicine Institute, Dublin, Ireland
| | - Niamh Lynam-Lennon
- Department of Surgery, Trinity St. James's Cancer Institute, Trinity Translational Medicine Institute, Dublin, Ireland.
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6
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Ovarian Cancer Radiosensitivity: What Have We Understood So Far? LIFE (BASEL, SWITZERLAND) 2022; 13:life13010006. [PMID: 36675955 PMCID: PMC9861683 DOI: 10.3390/life13010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/11/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022]
Abstract
Radiotherapy has been increasingly considered as an active treatment to combine with other approaches (i.e., surgery, chemotherapy, and novel target-based drugs) in ovarian cancers to palliate symptoms and/or to prolong chemotherapy-free intervals. This narrative review aimed to summarize the current knowledge of the radiosensitivity/radioresistance of ovarian cancer which remains the most lethal gynecological cancer worldwide. Indeed, considering the high rate of recurrence in and out of the radiotherapy fields, in the era of patient-tailored oncology, elucidating the mechanisms of radiosensitivity and identifying potential radioresistance biomarkers could be crucial in guiding clinical decision-making.
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4-Methylumebelliferone Enhances Radiosensitizing Effects of Radioresistant Oral Squamous Cell Carcinoma Cells via Hyaluronan Synthase 3 Suppression. Cells 2022; 11:cells11233780. [PMID: 36497040 PMCID: PMC9741296 DOI: 10.3390/cells11233780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Radioresistant (RR) cells are poor prognostic factors for tumor recurrence and metastasis after radiotherapy. The hyaluronan (HA) synthesis inhibitor, 4-methylumbelliferone (4-MU), shows anti-tumor and anti-metastatic effects through suppressing HA synthase (HAS) expression in various cancer cells. We previously reported that the administration of 4-MU with X-ray irradiation enhanced radiosensitization. However, an effective sensitizer for radioresistant (RR) cells is yet to be established, and it is unknown whether 4-MU exerts radiosensitizing effects on RR cells. We investigated the radiosensitizing effects of 4-MU in RR cell models. This study revealed that 4-MU enhanced intracellular oxidative stress and suppressed the expression of cluster-of-differentiation (CD)-44 and cancer stem cell (CSC)-like phenotypes. Interestingly, eliminating extracellular HA using HA-degrading enzymes did not cause radiosensitization, whereas HAS3 knockdown using siRNA showed similar effects as 4-MU treatment. These results suggest that 4-MU treatment enhances radiosensitization of RR cells through enhancing oxidative stress and suppressing the CSC-like phenotype. Furthermore, the radiosensitizing mechanisms of 4-MU may involve HAS3 or intracellular HA synthesized by HAS3.
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Biological Mechanisms to Reduce Radioresistance and Increase the Efficacy of Radiotherapy: State of the Art. Int J Mol Sci 2022; 23:ijms231810211. [PMID: 36142122 PMCID: PMC9499172 DOI: 10.3390/ijms231810211] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/25/2022] [Accepted: 09/02/2022] [Indexed: 12/02/2022] Open
Abstract
Cancer treatment with ionizing radiation (IR) is a well-established and effective clinical method to fight different types of tumors and is a palliative treatment to cure metastatic stages. Approximately half of all cancer patients undergo radiotherapy (RT) according to clinical protocols that employ two types of ionizing radiation: sparsely IR (i.e., X-rays) and densely IR (i.e., protons). Most cancer cells irradiated with therapeutic doses exhibit radio-induced cytotoxicity in terms of cell proliferation arrest and cell death by apoptosis. Nevertheless, despite the more tailored advances in RT protocols in the last few years, several tumors show a relatively high percentage of RT failure and tumor relapse due to their radioresistance. To counteract this extremely complex phenomenon and improve clinical protocols, several factors associated with radioresistance, of both a molecular and cellular nature, must be considered. Tumor genetics/epigenetics, tumor microenvironment, tumor metabolism, and the presence of non-malignant cells (i.e., fibroblast-associated cancer cells, macrophage-associated cancer cells, tumor-infiltrating lymphocytes, endothelial cells, cancer stem cells) are the main factors important in determining the tumor response to IR. Here, we attempt to provide an overview of how such factors can be taken advantage of in clinical strategies targeting radioresistant tumors.
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Matsuoka Y, Yoshida R, Kawahara K, Sakata J, Arita H, Nkashima H, Takahashi N, Hirayama M, Nagata M, Hirosue A, Kuwahara Y, Fukumoto M, Toya R, Murakami R, Nakayama H. The antioxidative stress regulator Nrf2 potentiates radioresistance of oral squamous cell carcinoma accompanied with metabolic modulation. J Transl Med 2022; 102:896-907. [PMID: 35414650 PMCID: PMC9309095 DOI: 10.1038/s41374-022-00776-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 01/27/2022] [Accepted: 02/08/2022] [Indexed: 12/12/2022] Open
Abstract
Nuclear factor erythroid 2-related factor 2 (Nrf2), which regulates the expression of critical antioxidant proteins, was recently demonstrated to play a key role in cancer progression. Resistance to radiotherapy is a major obstacle in treating oral squamous cell carcinoma (OSCC). However, little is known about the association between Nrf2 and radioresistance in OSCC. Two OSCC cell lines (SAS and HSC-2) and their clinically relevant radioresistant (CRR) clones (SAS-R, HSC-2-R) were used. The effects of Nrf2 downregulation on radiosensitivity and the involvement of glycolysis in Nrf2-mediated radioresistance were evaluated. Immunohistochemistry of phosphorylated Nrf2 (p-Nrf2) was performed in 110 patients with OSCC who underwent preoperative chemoradiotherapy and surgery. Nrf2 was stably upregulated in CRR cells in vitro and in a mouse xenograft model. Moreover, elevated Nrf2 expression was associated with radioresistance. The enhancement of Nrf2-dependent glycolysis and glutathione synthesis was involved in the development of radioresistance. Additionally, p-Nrf2 expression was closely related to the pathological response to chemoradiotherapy, and its expression was predictive of prognosis in patients with advanced OSCC. Our results suggest that Nrf2 plays an important role in the radioresistance of OSCC accompanied by metabolic reprogramming. Targeting Nrf2 antioxidant pathway may represent a promising treatment strategy for highly malignant OSCC.
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Affiliation(s)
- Yuichiro Matsuoka
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Ryoji Yoshida
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.
| | - Kenta Kawahara
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Junki Sakata
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Hidetaka Arita
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Hikaru Nkashima
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Nozomu Takahashi
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Masatoshi Hirayama
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Masashi Nagata
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Akiyuki Hirosue
- grid.274841.c0000 0001 0660 6749Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Yoshikazu Kuwahara
- grid.412755.00000 0001 2166 7427Division of Radiation Biology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Miyagi, 981-8558 Japan
| | - Manabu Fukumoto
- grid.410793.80000 0001 0663 3325Department of Molecular Pathology, Tokyo Medical University, Tokyo, 160-8402 Japan
| | - Ryo Toya
- grid.274841.c0000 0001 0660 6749Department of Radiation Oncology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556 Japan
| | - Ryuji Murakami
- grid.274841.c0000 0001 0660 6749Department of Medical Radiation Sciences, Faculty of Life Sciences, Kumamoto University, Kumamoto, 862-0976 Japan
| | - Hideki Nakayama
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.
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Kuwahara Y, Tomita K, Roudkenar MH, Roushandeh AM, Urushihara Y, Igarashi K, Kurimasa A, Sato T. Decreased mitochondrial membrane potential is an indicator of radioresistant cancer cells. Life Sci 2021; 286:120051. [PMID: 34666039 DOI: 10.1016/j.lfs.2021.120051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/16/2021] [Accepted: 10/11/2021] [Indexed: 12/18/2022]
Abstract
AIMS To overcome radioresistant cancer cells, clinically relevant radioresistant (CRR) cells were established. To maintain their radioresistance, CRR cells were exposed 2 Gy/day of X-rays daily (maintenance irradiation: MI). To understand whether the radioresistance induced by X-rays was reversible or irreversible, the difference between CRR cells and those without MI for a year (CRR-NoIR cells) was investigated by the mitochondrial function as an index. MAIN METHODS Radiation sensitivity was determined by modified high density survival assay. Mitochondrial membrane potential (Δψm) was determined by 5,5',6,6'-tetrachloro-1,1', tetraethylbenzimidazolocarbo-cyanine iodide (JC-1) staining. Rapid Glucose-Galactose assay was performed to determine the shift in their energy metabolism from aerobic glycolysis to oxidative phosphorylation in CRR cells. Involvement of prohibitin-1 (PHB1) in Δψm was evaluated by knockdown of PHB1 gene followed by real-time PCR. KEY FINDINGS CRR cells that exhibited resistant to 2 Gy/day X-ray lost their radioresistance after more than one year of culture without MI for a year. In addition, CRR cells lost their radioresistance when the mitochondria were activated by galactose. Furthermore, Δψm were increased and PHB1 expression was down-regulated, in the process of losing their radioresistance. SIGNIFICANCE Our finding reveled that tune regulation of mitochondrial function is implicated in radioresistance phenotype of cancer cells. Moreover, as our findings indicate, though further studies are required to clarify the precise mechanisms underlying cancer cell radioresistance, radioresistant cells induced by irradiation and cancer stem cells that are originally radioresistant should be considered separately, the radioresistance of CRR cells is reversible.
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Affiliation(s)
- Yoshikazu Kuwahara
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1, Fukumuro, Miyagino, Sendai, Miyagi, Japan; Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan
| | - Kazuo Tomita
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan.
| | - Mehryar Habibi Roudkenar
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan; Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Amaneh Mohammadi Roushandeh
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan; Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Yusuke Urushihara
- Department of Radiation Biology, Tohoku University School of Medicine, 2-1 Seiryomachi, Aoba, Snedai, Miyagi, Japan
| | - Kento Igarashi
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan
| | - Akihiro Kurimasa
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1, Fukumuro, Miyagino, Sendai, Miyagi, Japan
| | - Tomoaki Sato
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, Japan.
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11
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The Effect of High-Dose-Rate Pulsed Radiation on the Survival of Clinically Relevant Radioresistant Cells. Life (Basel) 2021; 11:life11121295. [PMID: 34947826 PMCID: PMC8708735 DOI: 10.3390/life11121295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/20/2021] [Accepted: 11/22/2021] [Indexed: 12/20/2022] Open
Abstract
We demonstrated that low dose pulsed radiation (0.25 Gy) at a high-dose-rate, even for very short intervals (10 s), decreases cell survival to a greater extent than single exposure to a similar total dose and dose rate. The objective of this study was to clarify whether high-dose-rate pulsed radiation is effective against SAS-R, a clinically relevant radioresistant cell line. Cell survival following high-dose-rate pulsed radiation was evaluated via a colony assay. Flow cytometry was utilized to evaluate γH2AX, a molecular marker of DNA double-strand breaks and delayed reactive oxygen species (ROS) associated with radiation-induced apoptosis. Increased cytotoxicity was observed in SAS-R and parent SAS cells in response to high dose rate pulsed radiation compared to single dose, as determined by colony assays. Residual γH2AX in both cells subjected to high-dose-rate pulsed radiation showed a tendency to increase, with a significant increase observed in SAS cells at 72 h. In addition, high-dose-rate pulsed radiation increased delayed ROS more than the single exposure did. These results indicate that high-dose-rate pulsed radiation was associated with residual γH2AX and delayed ROS, and high-dose-rate pulsed radiation may be used as an effective radiotherapy procedure against radioresistant cells.
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12
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Tsutsumi K, Chiba A, Tadaki Y, Minaki S, Ooshima T, Takahashi H. Contribution of Neuropilin-1 in Radiation-Survived Subclones of NSCLC Cell Line H1299. Curr Issues Mol Biol 2021; 43:1203-1211. [PMID: 34698100 PMCID: PMC8928997 DOI: 10.3390/cimb43030085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/18/2021] [Accepted: 09/19/2021] [Indexed: 11/17/2022] Open
Abstract
Non-small cell lung cancer (NSCLC) is an aggressive lung cancer accounting for approximately 85% of all lung cancer patients. For the patients with Stages IIIA, IIIB, and IIIC, the 5-year survival is low though with the combination with radiotherapy and chemotherapy. In addition, the occurrence of tumor cells (repopulated tumors) that survive irradiation remains a challenge. In our previous report, we subcloned the radiation-surviving tumor cells (IR cells) using the human NSCLC cell line, H1299, and found that the expression of neuropilin-1 (NRP-1) was upregulated in IR cells by the microarray analysis. Here, we investigated the contribution of neuropilin-1 to changes in the characteristics of IR cells. Although there were no differences in angiogenic activity in the tube formation assay between parental and IR cells, the cell motility was increased in IR cells compared to parental cells in the cell migration assay. This enhanced cell motility was suppressed by pretreatment with anti-NRP-1 antibody. Although further studies are necessary to identify other molecules associated with NRP-1, the increase in cellular motility in IR cells might be due to the contribution of NRP-1. Inhibition of NRP-1 would help control tumor malignancy in radiation-surviving NSCLC.
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Affiliation(s)
- Kaori Tsutsumi
- Faculty of Health Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Correspondence: ; Tel.: +81-11-706-3421
| | - Ayaka Chiba
- Division of Radiology and Nuclear Medicine, Sapporo Medical University Hospital, Sapporo 060-8556, Japan;
| | - Yuta Tadaki
- Department of Radiological Technology, Saiseikai Otaru Hospital, Otaru 047-0008, Japan;
| | - Shima Minaki
- Department of Radiological Technology, Sapporo Spine Clinic, Sapporo 060-0042, Japan;
| | - Takahito Ooshima
- Department of Radiological Technology, Tomakomai City Hospital, Tomakomai 053-8567, Japan;
| | - Haruka Takahashi
- Department of X-ray Technology, Sapporo City General Hospital, Sapporo 060-8604, Japan;
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13
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Mitochondrial Dysfunction in Diseases, Longevity, and Treatment Resistance: Tuning Mitochondria Function as a Therapeutic Strategy. Genes (Basel) 2021; 12:genes12091348. [PMID: 34573330 PMCID: PMC8467098 DOI: 10.3390/genes12091348] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 01/31/2023] Open
Abstract
Mitochondria are very important intracellular organelles because they have various functions. They produce ATP, are involved in cell signaling and cell death, and are a major source of reactive oxygen species (ROS). Mitochondria have their own DNA (mtDNA) and mutation of mtDNA or change the mtDNA copy numbers leads to disease, cancer chemo/radioresistance and aging including longevity. In this review, we discuss the mtDNA mutation, mitochondrial disease, longevity, and importance of mitochondrial dysfunction in cancer first. In the later part, we particularly focus on the role in cancer resistance and the mitochondrial condition such as mtDNA copy number, mitochondrial membrane potential, ROS levels, and ATP production. We suggest a therapeutic strategy employing mitochondrial transplantation (mtTP) for treatment-resistant cancer.
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14
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Tomita K, Nagasawa T, Kuwahara Y, Torii S, Igarashi K, Roudkenar MH, Roushandeh AM, Kurimasa A, Sato T. MiR-7-5p Is Involved in Ferroptosis Signaling and Radioresistance Thru the Generation of ROS in Radioresistant HeLa and SAS Cell Lines. Int J Mol Sci 2021; 22:ijms22158300. [PMID: 34361070 PMCID: PMC8348045 DOI: 10.3390/ijms22158300] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 12/11/2022] Open
Abstract
In cancer therapy, radioresistance or chemoresistance cells are major problems. We established clinically relevant radioresistant (CRR) cells that can survive over 30 days after 2 Gy/day X-ray exposures. These cells also show resistance to anticancer agents and hydrogen peroxide (H2O2). We have previously demonstrated that all the CRR cells examined had up-regulated miR-7-5p and after miR-7-5p knockdown, they lost radioresistance. However, the mechanism of losing radioresistance remains to be elucidated. Therefore, we investigated the role of miR-7-5p in radioresistance by knockdown of miR-7-5p using CRR cells. As a result, knockdown of miR-7-5p increased reactive oxygen species (ROS), mitochondrial membrane potential, and intracellular Fe2+ amount. Furthermore, miR-7-5p knockdown results in the down-regulation of the iron storage gene expression such as ferritin, up-regulation of the ferroptosis marker ALOX12 gene expression, and increases of Liperfluo amount. H2O2 treatment after ALOX12 overexpression led to the enhancement of intracellular H2O2 amount and lipid peroxidation. By contrast, miR-7-5p knockdown seemed not to be involved in COX-2 and glycolysis signaling but affected the morphology of CRR cells. These results indicate that miR-7-5p control radioresistance via ROS generation that leads to ferroptosis.
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Affiliation(s)
- Kazuo Tomita
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City 890-8544, Kagoshima, Japan; (T.N.); (Y.K.); (K.I.); (M.H.R.); (A.M.R.); (T.S.)
- Correspondence: ; Tel.: +81-99-275-6162
| | - Taisuke Nagasawa
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City 890-8544, Kagoshima, Japan; (T.N.); (Y.K.); (K.I.); (M.H.R.); (A.M.R.); (T.S.)
| | - Yoshikazu Kuwahara
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City 890-8544, Kagoshima, Japan; (T.N.); (Y.K.); (K.I.); (M.H.R.); (A.M.R.); (T.S.)
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai-City 983-8536, Miyagi, Japan;
| | - Seiji Torii
- Center for Food Science and Wellness, Gunma University, Maebashi-City 371-8510, Gunma, Japan;
| | - Kento Igarashi
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City 890-8544, Kagoshima, Japan; (T.N.); (Y.K.); (K.I.); (M.H.R.); (A.M.R.); (T.S.)
| | - Mehryar Habibi Roudkenar
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City 890-8544, Kagoshima, Japan; (T.N.); (Y.K.); (K.I.); (M.H.R.); (A.M.R.); (T.S.)
- Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht 41937-13194, Iran
| | - Amaneh Mohammadi Roushandeh
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City 890-8544, Kagoshima, Japan; (T.N.); (Y.K.); (K.I.); (M.H.R.); (A.M.R.); (T.S.)
- Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht 41937-13194, Iran
| | - Akihiro Kurimasa
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai-City 983-8536, Miyagi, Japan;
| | - Tomoaki Sato
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City 890-8544, Kagoshima, Japan; (T.N.); (Y.K.); (K.I.); (M.H.R.); (A.M.R.); (T.S.)
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15
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Miura K, Nagahashi M, Prasoon P, Hirose Y, Kobayashi T, Sakata J, Abe M, Sakimura K, Matsuda Y, Butash AL, Katsuta E, Takabe K, Wakai T. Dysregulation of sphingolipid metabolic enzymes leads to high levels of sphingosine-1-phosphate and ceramide in human hepatocellular carcinoma. Hepatol Res 2021; 51:614-626. [PMID: 33586816 DOI: 10.1111/hepr.13625] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 01/23/2021] [Accepted: 01/29/2021] [Indexed: 12/15/2022]
Abstract
AIM Sphingosine-1-phosphate (S1P) and ceramide are bioactive sphingolipids known to be important in regulating numerous processes involved in cancer progression. The aim of this study was to determine the absolute levels of sphingolipids in hepatocellular carcinoma (HCC) utilizing data obtained from surgical specimens. In addition, we explored the clinical significance of S1P in patients with HCC and the biological role of S1P in HCC cells. METHODS Tumors and normal liver tissues were collected from 20 patients with HCC, and sphingolipids were measured by mass spectrometry. The Cancer Genome Atlas (TCGA) cohort was utilized to evaluate gene expression of enzymes related to sphingolipid metabolism. Immunohistochemistry of phospho-sphingosine kinase 1 (SphK1), an S1P-producing enzyme, was performed for 61 surgical specimens. CRISPR/Cas9-mediated SphK1 knockout cells were used to examine HCC cell biology. RESULTS S1P levels were substantially higher in HCC tissue compared with normal liver tissue. Levels of other sphingolipids upstream of S1P in the metabolic cascade, such as sphingomyelin, monohexosylceramide and ceramide, were also considerably higher in HCC tissue. Enzymes involved in generating S1P and its precursor, ceramide, were found in higher levels in HCC compared with normal liver tissue. Immunohistochemical analysis found that phospho-SphK1 expression was associated with tumor size. Finally, in vitro assays indicated that S1P is involved in the aggressiveness of HCC cells. CONCLUSIONS Sphingolipid levels, including S1P and ceramide, were elevated in HCC compared with surrounding normal liver tissue. Our findings suggest S1P plays an important role in HCC tumor progression, and further examination is warranted.
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Affiliation(s)
- Kohei Miura
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
| | - Masayuki Nagahashi
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
| | - Pankaj Prasoon
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
| | - Yuki Hirose
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
| | - Takashi Kobayashi
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
| | - Jun Sakata
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
| | - Manabu Abe
- Department of Animal Model Development, Brain Research Institute, Niigata University, Niigata, Niigata, Japan
| | - Kenji Sakimura
- Department of Animal Model Development, Brain Research Institute, Niigata University, Niigata, Niigata, Japan
| | - Yasunobu Matsuda
- Department of Medical Technology, Niigata University Graduate School of Health Sciences, Niigata, Niigata, Japan
| | - Ali L Butash
- Breast Surgery, Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA
| | - Eriko Katsuta
- Breast Surgery, Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA
| | - Kazuaki Takabe
- Breast Surgery, Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA.,Department of Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, New York, USA.,Department of Breast Surgery and Oncology, Tokyo Medical University, Shinjuku, Tokyo, Japan.,Department of Surgery, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Toshifumi Wakai
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
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16
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Marcone S, Buckley A, Ryan CJ, McCabe M, Lynam-Lennon N, Matallanas D, O Sullivan J, Kennedy S. Proteomic signatures of radioresistance: Alteration of inflammation, angiogenesis and metabolism-related factors in radioresistant oesophageal adenocarcinoma. Cancer Treat Res Commun 2021; 27:100376. [PMID: 33882379 DOI: 10.1016/j.ctarc.2021.100376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 04/09/2021] [Accepted: 04/11/2021] [Indexed: 01/06/2023]
Abstract
The clinical management of locally advanced oesophageal adenocarcinoma (OAC) involves neoadjuvant chemoradiotherapy (CRT), but as radioresistance remains a major clinical challenge, complete pathological response to CRT only occurs in 20-30% of patients. In this study we used an established isogenic cell line model of radioresistant OAC to detect proteomic signatures of radioresistance to identify novel molecular and cellular targets of radioresistance in OAC. A total of 5785 proteins were identified of which 251 were significantly modulated in OE33R cells, when compared to OE33P. Gene ontology and pathway analysis of these significantly modulated proteins demonstrated altered metabolism in radioresistant cells accompanied by an inhibition of apoptosis. In addition, inflammatory and angiogenic pathways were positively regulated in radioresistant cells compared to the radiosensitive cells. In this study, we demonstrate, for the first time, a comprehensive proteomic profile of the established isogenic cell line model of radioresistant OAC. This analysis provides insights into the molecular and cellular pathways which regulate radioresistance in OAC. Furthermore, it identifies pathway specific signatures of radioresistance that will direct studies on the development of targeted therapies and personalised approaches to radiotherapy.
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Affiliation(s)
- Simone Marcone
- Department of Surgery, Trinity Translational Medicine Institute, Trinity St. James's Cancer Institute, St. James's Hospital, Trinity College Dublin, Dublin, Ireland.
| | - Amy Buckley
- Department of Surgery, Trinity Translational Medicine Institute, Trinity St. James's Cancer Institute, St. James's Hospital, Trinity College Dublin, Dublin, Ireland
| | - Colm J Ryan
- School of Computer Science, University College Dublin, Dublin 4, Ireland; Systems Biology Ireland, School of Medicine, University College Dublin, Dublin 4, Ireland
| | - Mark McCabe
- Department of Surgery, Trinity Translational Medicine Institute, Trinity St. James's Cancer Institute, St. James's Hospital, Trinity College Dublin, Dublin, Ireland
| | - Niamh Lynam-Lennon
- Department of Surgery, Trinity Translational Medicine Institute, Trinity St. James's Cancer Institute, St. James's Hospital, Trinity College Dublin, Dublin, Ireland
| | - David Matallanas
- Systems Biology Ireland, School of Medicine, University College Dublin, Dublin 4, Ireland
| | - Jacintha O Sullivan
- Department of Surgery, Trinity Translational Medicine Institute, Trinity St. James's Cancer Institute, St. James's Hospital, Trinity College Dublin, Dublin, Ireland
| | - Susan Kennedy
- Department of Surgery, Trinity Translational Medicine Institute, Trinity St. James's Cancer Institute, St. James's Hospital, Trinity College Dublin, Dublin, Ireland
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17
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Solórzano-Meléndez A, Rodrigo-Alarcón R, Gómez-Meda BC, Zamora-Pérez AL, Ortiz-García RG, Bayardo-López LH, González-Virgen R, Gallegos-Arreola MP, Zúñiga-González GM. Micronucleated erythrocytes in peripheral blood from neonate rats fed by nursing mothers exposed to X-rays. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2021; 62:177-184. [PMID: 33496960 DOI: 10.1002/em.22426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/20/2021] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Most women with breast cancer can become pregnant and give birth while undergoing radiation therapy and breastfeeding is generally not contraindicated. The induction of long-lived reactive species in proteins, such as casein by X-ray radiation and DNA damage to unexposed organisms, has been shown when ingesting irradiated cheese. To determine whether exposing lactating rats to X-rays increases the number of micronucleated erythrocytes (MNEs) in peripheral blood of their unexposed or breastfeeding rat pups, 15 female Wistar rats were divided into three groups: Negative control; Experimental group exposed to X-rays, and group exposed to X-rays plus vitamin C. The mothers of groups 2 and 3 were irradiated for three consecutive days after giving birth, returning them to their respective cages each time to continue lactation. A blood sample was taken from the mothers and pups at 0, 24, and 48 hr. Blood smears were stained with acridine orange to analyze MNEs. In mother rats, the frequency of micronucleated polychromatic erythrocytes (MNPCEs) increased significantly at 24 and 48 hr in both study groups exposed to radiation. Likewise, in rat pups the MNPCE and MNE frequencies increased in both groups with radiation and radiation plus vitamin C at 24 and 48 hr, and a protection from vitamin C was observed. In conclusion, the genotoxic damage produced in rat pups that were lactated by mothers irradiated with X-rays is possibly due to the effect of long-lived reactive species that were formed in the breast milk of female Wistar rats during the irradiation process.
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Affiliation(s)
- Alejandro Solórzano-Meléndez
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Rodolfo Rodrigo-Alarcón
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Belinda C Gómez-Meda
- Instituto de Genética Humana "Dr. Enrique Corona Rivera", Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Ana L Zamora-Pérez
- Instituto de Investigación en Odontología, Departamento de Clínicas Odontológicas Integrales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Ramón G Ortiz-García
- Laboratorio de Mutagénesis, División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
- Doctorado en Genética Humana, Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Luis H Bayardo-López
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Roberto González-Virgen
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Martha P Gallegos-Arreola
- Laboratorio de Genética Molecular, División de Genética, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Guillermo M Zúñiga-González
- Laboratorio de Mutagénesis, División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
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18
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Kuwahara Y, Tomita K, Roudkenar MH, Roushandeh AM, Urushihara Y, Igarashi K, Nagasawa T, Kurimasa A, Fukumoto M, Sato T. The Effects of Hydrogen Peroxide and/or Radiation on the Survival of Clinically Relevant Radioresistant Cells. Technol Cancer Res Treat 2020; 19:1533033820980077. [PMID: 33334271 PMCID: PMC7758870 DOI: 10.1177/1533033820980077] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Radiation therapy is a highly cost-effective treatment for cancer, but the existence of radio-resistant cells remains the most critical obstacle in radiotherapy. We have been established clinically relevant radioresistant (CRR) cell lines by exposure to a stepwise increase of fractionated X-rays. We are trying to overcome the radio-resistance by analyzing the properties of these cells. In this study, we tried to evaluate the effects of hydrogen peroxide (H2O2) on the CRR cells because this can evaluate the efficacy of Kochi Oxydol-Radiation Therapy for Unresectable Carcinomas (KORTUC) that treats H2O2 before irradiation. We also established H2O2-resistant cells to compare the radiation and H2O2 resistant phenotype. MATERIALS AND METHODS We used human cancer cell lines derived from hepatoblastoma (HepG2), oral squamous cell carcinoma (SAS), and cervical cancer (HeLa). We established HepG2, SAS, and HeLa CRR cells and HepG2, SAS, and HeLa H2O2-resistant cells. To evaluate their sensitivity to radiation or H2O2, high-density survival assay, or WST assay was performed. CellROXTM was used to detect intracellular Reactive Oxygen Species (ROS). RESULTS CRR cells were resistant to H2O2-induced cell death but H2O2-resistant cells were not resistant to irradiation. This phenotype of CRR cells was irreversible. The intracellular ROS was increased in parental cells after H2O2 treatment for 3 h, but in CRR cells, no significant increase was observed. CONCLUSION Fractionated X-ray exposure induces H2O2 resistance in CRR cells. Therefore, it is necessary to carry out cancer therapy such as KORTUC with the presence of these resistant cells in mind, and as the next stage, it would be necessary to investigate the appearance rate of these cells immediately and take countermeasures.
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Affiliation(s)
- Yoshikazu Kuwahara
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Fukumuro, Miyagino, Sendai, Miyagi, Japan.,Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan
| | - Kazuo Tomita
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan
| | - Mehryar Habibi Roudkenar
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan.,Cardiovascular Disease Research Center, Department of Cardiology, Heshmat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Amaneh Mohammadi Roushandeh
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan.,Biotechnology, Paramedicine Faculty, Guilan University of Medical Sciences, Rasht, Iran
| | - Yusuke Urushihara
- Department of Radiation Biology, Tohoku University School of Medicine, Aoba, Sendai, Miyagi, Japan
| | - Kento Igarashi
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan
| | - Taisuke Nagasawa
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan
| | - Akihiro Kurimasa
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Fukumuro, Miyagino, Sendai, Miyagi, Japan
| | - Manabu Fukumoto
- RIKEN, Center for Advanced Intelligence Project, Chuo-ku, Tokyo, Japan
| | - Tomoaki Sato
- Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan
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19
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Saito Y, Miura H, Takahashi N, Kuwahara Y, Yamamoto Y, Fukumoto M, Yamamoto F. Involvement of APOBEC3B in mutation induction by irradiation. JOURNAL OF RADIATION RESEARCH 2020; 61:819-827. [PMID: 32880638 PMCID: PMC7674755 DOI: 10.1093/jrr/rraa069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 07/16/2020] [Indexed: 05/14/2023]
Abstract
To better understand the cancer risk posed by radiation and the development of radiation therapy resistant cancer cells, we investigated the involvement of the cancer risk factor, APOBEC3B, in the generation of radiation-induced mutations. Expression of APOBEC3B in response to irradiation was determined in three human cancer cell lines by real-time quantitative PCR. Using the hypoxanthine-guanine phosphoribosyl transferase (HPRT) mutation assay, mutations in the HPRT gene caused by irradiation were compared between APOBEC3B-deficient human hepatocellular carcinoma (HepG2) cells [APOBEC3B knocked out (KO) using CRISPR-Cas9 genome editing] and the parent cell line. Then, HPRT-mutated cells were individually cultured to perform PCR and DNA sequencing of HPRT exons. X-Irradiation induced APOBEC3B expression in HepG2, human cervical cancer epithelial carcinoma (HeLa) and human oral squamous cell carcinoma (SAS) cells. Forced expression of APOBEC3B increased spontaneous mutations. By contrast, APOBEC3B KO not only decreased the spontaneous mutation rate, but also strongly suppressed the increase in mutation frequency after irradiation in the parent cell line. Although forced expression of APOBEC3B in the nucleus caused DNA damage, higher levels of APOBEC3B tended to reduce APOBEC3B-induced γ-H2AX foci formation (a measure of DNA damage repair). Further, the number of γ-H2AX foci in cells stably expressing APOBEC3B was not much higher than that in controls before and after irradiation, suggesting that a DNA repair pathway may be activated. This study demonstrates that irradiation induces sustained expression of APOBEC3B in HepG2, HeLa and SAS cells, and that APOBEC3B enhances radiation-induced partial deletions.
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Affiliation(s)
- Yohei Saito
- Corresponding author. Department of Radiopharmacy, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aobaku, Sendai, 981-8558, Japan. Tel: +81-22-727-0161; Fax: +81-22-727-0165;
| | - Hiromasa Miura
- Department of Radiopharmacy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Nozomi Takahashi
- Department of Radiopharmacy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Yoshikazu Kuwahara
- Department of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Yumi Yamamoto
- Department of Radiopharmacy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Manabu Fukumoto
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
- Department of Molecular Pathology, Tokyo Medical University, Tokyo, Japan
| | - Fumihiko Yamamoto
- Department of Radiopharmacy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
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20
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Jin X, Yuan L, Liu B, Kuang Y, Li H, Li L, Zhao X, Li F, Bing Z, Chen W, Yang L, Li Q. Integrated analysis of circRNA-miRNA-mRNA network reveals potential prognostic biomarkers for radiotherapies with X-rays and carbon ions in non-small cell lung cancer. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:1373. [PMID: 33313118 PMCID: PMC7723558 DOI: 10.21037/atm-20-2002] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Background This work was aimed at exploring the regulatory network of non-coding RNA (ncRNA) especially circular RNA (circRNA) and microRNA (miRNA), in the sensitivity of non-small cell lung cancer (NSCLC) cells to low linear energy transfer (LET) X-ray and high-LET carbon ion irradiations. Methods The radioresistant NSCLC cell line A549-R11 was obtained from its parental cell line A549 through irradiation with X-rays of 2.0 Gy per fraction for 30 times. The sensitivities of A549, A549-R11 and H1299 cells exposed to X-rays and carbon ions were verified using the colony formation assay. A comprehensive circRNA-miRNA-mRNA network was constructed through the sequencing data in parental A549, acquired radioresistant A549-R11 and intrinsic radioresistant H1299 cells, and the network was further optimized according to the prognostic results from the TCGA and GEO databases. Results Based on high-throughput sequencing of circRNAs, we found that 40 circRNAs were up-regulated while 184 circRNAs were down-regulated in the intersection of the sets of A549-R11 and H1299 cells. Subsequently, a circRNA- miRNA-mRNA network, including 14 interactive pairs and 8 circRNAs, 4 overall survival-associated miRNAs, and 4 mRNAs, was constructed through the high-throughput data screening and bioinformatics methods. Conclusions Our results provide a complete understanding to the regulatory mechanism of the sensitivities to low-LET X-ray and high-LET carbon ion irradiations, and might be helpful to screen potential biomarkers for predicting the Carbon-ion radiotherapy (CIRT) and X-ray radiotherapy responses in NSCLC.
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Affiliation(s)
- Xiaodong Jin
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Lingyan Yuan
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Bingtao Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Yanbei Kuang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Hongbin Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Linying Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Xueshan Zhao
- Department of Oncology Radiotherapy, The First Hospital of Lanzhou University, Lanzhou, China
| | - Feifei Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Zhitong Bing
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Weiqiang Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Lei Yang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Qiang Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China
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21
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The p53-53BP1-Related Survival of A549 and H1299 Human Lung Cancer Cells after Multifractionated Radiotherapy Demonstrated Different Response to Additional Acute X-ray Exposure. Int J Mol Sci 2020; 21:ijms21093342. [PMID: 32397297 PMCID: PMC7246764 DOI: 10.3390/ijms21093342] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/25/2020] [Accepted: 05/06/2020] [Indexed: 12/12/2022] Open
Abstract
Radiation therapy is one of the main methods of treating patients with non-small cell lung cancer (NSCLC). However, the resistance of tumor cells to exposure remains the main factor that limits successful therapeutic outcome. To study the molecular/cellular mechanisms of increased resistance of NSCLC to ionizing radiation (IR) exposure, we compared A549 (p53 wild-type) and H1299 (p53-deficient) cells, the two NSCLC cell lines. Using fractionated X-ray irradiation of these cells at a total dose of 60 Gy, we obtained the survived populations and named them A549IR and H1299IR, respectively. Further characterization of these cells showed multiple alterations compared to parental NSCLC cells. The additional 2 Gy exposure led to significant changes in the kinetics of γH2AX and phosphorylated ataxia telangiectasia mutated (pATM) foci numbers in A549IR and H1299IR compared to parental NSCLC cells. Whereas A549, A549IR, and H1299 cells demonstrated clear two-component kinetics of DNA double-strand break (DSB) repair, H1299IR showed slower kinetics of γH2AX foci disappearance with the presence of around 50% of the foci 8 h post-IR. The character of H2AX phosphorylation in these cells was pATM-independent. A decrease of residual γH2AX/53BP1 foci number was observed in both A549IR and H1299IR compared to parental cells post-IR at extra doses of 2, 4, and 6 Gy. This process was accompanied with the changes in the proliferation, cell cycle, apoptosis, and the expression of ATP-binding cassette sub-family G member 2 (ABCG2, also designated as CDw338 and the breast cancer resistance protein (BCRP)) protein. Our study provides strong evidence that different DNA repair mechanisms are activated by multifraction radiotherapy (MFR), as well as single-dose IR, and that the enhanced cellular survival after MFR is reliant on both p53 and 53BP1 signaling along with non-homologous end-joining (NHEJ). Our results are of clinical significance as they can guide the choice of the most effective IR regimen by analyzing the expression status of the p53–53BP1 pathway in tumors and thereby maximize therapeutic benefits for the patients while minimizing collateral damage to normal tissue.
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22
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Oike T, Ohno T. Molecular mechanisms underlying radioresistance: data compiled from isogenic cell experiments. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:273. [PMID: 32355717 PMCID: PMC7186667 DOI: 10.21037/atm.2020.02.90] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Takahiro Oike
- Department of Radiation Oncology, Gunma University Graduate School of Medicine, Gunma, Japan.,Gunma University Heavy Ion Medical Center, Gunma, Japan
| | - Tatsuya Ohno
- Department of Radiation Oncology, Gunma University Graduate School of Medicine, Gunma, Japan.,Gunma University Heavy Ion Medical Center, Gunma, Japan
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23
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Sakata J, Hirosue A, Yoshida R, Matsuoka Y, Kawahara K, Arita H, Nakashima H, Yamamoto T, Nagata M, Kawaguchi S, Gohara S, Nagao Y, Yamana K, Toya R, Murakami R, Kuwahara Y, Fukumoto M, Nakayama H. Enhanced Expression of IGFBP-3 Reduces Radiosensitivity and Is Associated with Poor Prognosis in Oral Squamous Cell Carcinoma. Cancers (Basel) 2020; 12:cancers12020494. [PMID: 32093285 PMCID: PMC7072421 DOI: 10.3390/cancers12020494] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/09/2020] [Accepted: 02/18/2020] [Indexed: 11/16/2022] Open
Abstract
Insulin-like growth factor (IGF) binding protein-3 (IGFBP-3) modulates various cell functions through IGF-dependent or independent mechanisms. However, its biological roles in the radiosensitivity of oral squamous cell carcinoma (OSCC) remain largely unknown. The purpose of this study was to determine the clinical significance and molecular mechanisms of the association between IGFBP-3 and OSCC radiosensitivity. We performed an immunohistochemical analysis of IGFBP-3 in 52 OSCC specimens from patients treated with preoperative chemoradiotherapy and surgery (phase II study). Associations between IGFBP-3 expression and clinicopathological features were also evaluated. In addition, we examined the effects of IGFBP-3 on post-X-ray irradiation radiosensitivity and DNA damage in vitro. High IGFBP-3 expression was significantly correlated with poor chemoradiotherapy responses and prognosis. With IGFBP-3 knockdown, irradiated OSCC cells exhibited significantly higher radiosensitivity compared with that of control cells. Moreover, IGFBP-3 depletion in OSCC cells reduced phosphorylation of the DNA-dependent protein kinase catalytic subunit (DNA-PKcs), which is required for DNA double-strand break repair during non-homologous end joining. These findings indicate that IGFBP-3 may have a significant role in regulating DNA repair and is be a potential biomarker for predicting clinical response to radiotherapy and prognosis in OSCC.
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Affiliation(s)
- Junki Sakata
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Akiyuki Hirosue
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
- Correspondence: (A.H.); (H.N.); Tel.: +81-96-373-5288 (A.H. & H.N.)
| | - Ryoji Yoshida
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Yuichiro Matsuoka
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Kenta Kawahara
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Hidetaka Arita
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Hikaru Nakashima
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Tatsuro Yamamoto
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Masashi Nagata
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Sho Kawaguchi
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Shunsuke Gohara
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Yuka Nagao
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Keisuke Yamana
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
| | - Ryo Toya
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto 860-8556, Japan;
| | - Ryuji Murakami
- Department of Medical Imaging, Faculty of Life Sciences, Kumamoto University, Kumamoto 862-0976, Japan;
| | - Yoshikazu Kuwahara
- Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aoba, Sendai, Miyagi 981-8558, Japan;
| | - Manabu Fukumoto
- Department of Molecular Pathology, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku, Tokyo 160-8402, Japan;
| | - Hideki Nakayama
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; (J.S.); (R.Y.); (Y.M.); (K.K.); (H.A.); (H.N.); (T.Y.); (M.N.); (S.K.); (S.G.); (Y.N.); (K.Y.)
- Correspondence: (A.H.); (H.N.); Tel.: +81-96-373-5288 (A.H. & H.N.)
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24
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Todorovic V, Prevc A, Zakelj MN, Savarin M, Brozic A, Groselj B, Strojan P, Cemazar M, Sersa G. Mechanisms of different response to ionizing irradiation in isogenic head and neck cancer cell lines. Radiat Oncol 2019; 14:214. [PMID: 31775835 PMCID: PMC6882348 DOI: 10.1186/s13014-019-1418-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 11/11/2019] [Indexed: 12/11/2022] Open
Abstract
Background Treatment options for recurrent head and neck tumours in the previously irradiated area are limited, including re-irradiation due to radioresistance of the recurrent tumour and previous dose received by surrounding normal tissues. As an in vitro model to study radioresistance mechanisms, isogenic cells with different radiosensitivity can be used. However, they are not readily available. Therefore, our objective was to establish and characterize radioresistant isogenic human pharyngeal squamous carcinoma cells and to evaluate early radiation response in isogenic parental, radioresistant and radiosensitive cells. Methods Radioresistant cells were derived from parental FaDu cells by repeated exposure to ionizing radiation. Radiosensitivity of the established isogenic radioresistant FaDu-RR cells was evaluated by clonogenic assay and compared to isogenic parental FaDu and radiosensitive 2A3 cells. Additional phenotypic characterization of these isogenic cells with different radiosensitivity included evaluation of chemosensitivity, cell proliferation, cell cycle, radiation-induced apoptosis, resolution of DNA double-strand breaks, and DNA damage and repair signalling gene expression before and after irradiation. Results In the newly established radioresistant cells in response to 5 Gy irradiation, we observed no alteration in cell cycle regulation, but delayed induction and enhanced resolution of DNA double-strand breaks, lower induction of apoptosis, and pronounced over-expression of DNA damage signalling genes in comparison to parental cells. On the other hand, radiosensitive 2A3 cells were arrested in G2/M-phase in response to 5 Gy irradiation, had a prominent accumulation of and slower resolution of DNA double-strand breaks, and no change in DNA damage signalling genes expression. Conclusions We concluded that the emergence of the radioresistance in the established radioresistant isogenic cells can be at least partially attributed to the enhanced DNA double-strand break repair, altered expression of DNA damage signalling and repair genes. On the other hand, in radiosensitive isogenic cells the reduced ability to repair a high number of induced DNA double-strand breaks and no transcriptional response in DNA damage signalling genes indicate on a lack of adaptive response to irradiation. Altogether, our results confirmed that these isogenic cells with different radiosensitivity are an appropriate model to study the mechanisms of radioresistance.
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Affiliation(s)
- Vesna Todorovic
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Ajda Prevc
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Martina Niksic Zakelj
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Monika Savarin
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Andreja Brozic
- Department of Cytopathology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Blaz Groselj
- Department of Radiation Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Primoz Strojan
- Department of Radiation Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia.,University of Ljubljana, Faculty of Medicine, Ljubljana, Slovenia
| | - Maja Cemazar
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia.,University of Primorska, Faculty of Health Sciences, Izola, Slovenia
| | - Gregor Sersa
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia. .,University of Ljubljana, Faculty of Health Sciences, Ljubljana, Slovenia.
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Sato K, Shimokawa T, Imai T. Difference in Acquired Radioresistance Induction Between Repeated Photon and Particle Irradiation. Front Oncol 2019; 9:1213. [PMID: 31799186 PMCID: PMC6863406 DOI: 10.3389/fonc.2019.01213] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 10/23/2019] [Indexed: 12/21/2022] Open
Abstract
In recent years, advanced radiation therapy techniques, including stereotactic body radiotherapy and carbon–ion radiotherapy, have progressed to such an extent that certain types of cancer can be treated with radiotherapy alone. The therapeutic outcomes are particularly promising for early stage lung cancer, with results matching those of surgical resection. Nevertheless, patients may still experience local tumor recurrence, which might be exacerbated by the acquisition of radioresistance after primary radiotherapy. Notwithstanding the risk of tumors acquiring radioresistance, secondary radiotherapy is increasingly used to treat recurrent tumors. In this context, it appears essential to comprehend the radiobiological effects of repeated photon and particle irradiation and their underlying cellular and molecular mechanisms in order to achieve the most favorable therapeutic outcome. However, to date, the mechanisms of acquisition of radioresistance in cancer cells have mainly been studied after repeated in vitro X-ray irradiation. By contrast, other critical aspects of radioresistance remain mostly unexplored, including the response to carbon-ion irradiation of X-ray radioresistant cancer cells, the mechanisms of acquisition of carbon-ion resistance, and the consequences of repeated in vivo X-ray or carbon-ion irradiation. In this review, we discuss the underlying mechanisms of acquisition of X-ray and carbon-ion resistance in cancer cells, as well as the phenotypic differences between X-ray and carbon-ion-resistant cancer cells, the biological implications of repeated in vivo X-ray or carbon-ion irradiation, and the main open questions in the field.
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Affiliation(s)
- Katsutoshi Sato
- Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, The Tisch Cancer Institute, New York, NY, United States
| | - Takashi Shimokawa
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Sciences and Technology, Chiba, Japan
| | - Takashi Imai
- Medical Databank, Department of Radiation Medicine, QST Hospital, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
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MiR-7-5p is a key factor that controls radioresistance via intracellular Fe 2+ content in clinically relevant radioresistant cells. Biochem Biophys Res Commun 2019; 518:712-718. [PMID: 31472959 DOI: 10.1016/j.bbrc.2019.08.117] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 08/22/2019] [Indexed: 12/28/2022]
Abstract
MicroRNA (miRNA) is a non-coding RNA involved in regulating both cancer gene promotion and suppression. We investigated the role of miRNA in inducing radiation resistance in cancer cell lines using clinically relevant radioresistant (CRR) cells. Analysis using miRNA arrays and qPCR revealed that miR-7-5p is highly expressed in all examined CRR cells. Additionally, CRR cells lose their radioresistance when daily irradiation is interrupted for over 6 months. MiR-7-5p expression is reduced in these cells, and treating CRR cells with a miR-7-5p inhibitor leads to a loss of resistance to irradiation. Conversely, overexpression of miR-7-5p in CRR cells using a miR-7-5p mimic shows further resistance to radiation. Overexpression of miR-7-5p in parent cells also results in resistance to radiation. These results indicate that miR-7-5p may control radioresistance in various cancer cells at the clinically relevant dose of irradiation. Furthermore, miR-7-5p downregulates mitoferrin and reduces Fe2+, which influences ferroptosis. Our findings have great potential not only for examining radiation resistance prior to treatment but also for providing new therapeutic agents for treatment-resistant cancers.
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27
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Alfonso JCL, Berk L. Modeling the effect of intratumoral heterogeneity of radiosensitivity on tumor response over the course of fractionated radiation therapy. Radiat Oncol 2019; 14:88. [PMID: 31146751 PMCID: PMC6543639 DOI: 10.1186/s13014-019-1288-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 05/06/2019] [Indexed: 01/31/2023] Open
Abstract
Background Standard radiobiology theory of radiation response assumes a uniform innate radiosensitivity of tumors. However, experimental data show that there is significant intratumoral heterogeneity of radiosensitivity. Therefore, a model with heterogeneity was developed and tested using existing experimental data to show the potential effects from the presence of an intratumoral distribution of radiosensitivity on radiation therapy response over a protracted radiation therapy treatment course. Methods The standard radiation response curve was modified to account for a distribution of radiosensitivity, and for variations in the repopulation rates of the tumor cell subpopulations. Experimental data from the literature were incorporated to determine the boundaries of the model. The proposed model was then used to show the changes in radiosensitivity of the tumor during treatment, and the effects of fraction size, α/β ratio and variation of the repopulation rates of tumor cells. Results In the presence of an intratumoral distribution of radiosensitivity, there is rapid selection of radiation-resistant cells over a course of fractionated radiation therapy. Standard treatment fractionation regimes result in the near-complete replacement of the initial population of sensitive cells with a population of more resistant cells. Further, as treatment progresses, the tumor becomes more resistant to further radiation treatment, making each fractional dose less efficacious. A wider initial distribution induces increased radiation resistance. Hypofractionation is more efficient in a heterogeneous tumor, with increased cell kill for biologically equivalent doses, while inducing less resistance. The model also shows that a higher growth rate in resistant cells can account for the accelerated repopulation that is seen during the clinical treatment of patients. Conclusions Modeling of tumor cell survival with radiosensitivity heterogeneity alters the predicted tumor response, and explains the induction of radiation resistance by radiation treatment, the development of accelerated repopulation, and the potential beneficial effects of hypofractionation. Tumor response to treatment may be better predicted by assaying for the distribution of radiosensitivity, or the extreme of the radiosensitivity, rather than measuring the initial, general radiation sensitivity of the untreated tumor.
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Affiliation(s)
- J C L Alfonso
- Department of Systems Immunology and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
| | - L Berk
- Division of Radiation Oncology, Department of Radiology, Morsani School of Medicine at the University of South Florida, Tampa, FL, USA
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Association between radiation-induced cell death and clinically relevant radioresistance. Histochem Cell Biol 2018; 150:649-659. [DOI: 10.1007/s00418-018-1728-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2018] [Indexed: 02/06/2023]
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Tomita K, Kuwahara Y, Takashi Y, Igarashi K, Nagasawa T, Nabika H, Kurimasa A, Fukumoto M, Nishitani Y, Sato T. Clinically relevant radioresistant cells exhibit resistance to H 2O 2 by decreasing internal H 2O 2 and lipid peroxidation. Tumour Biol 2018; 40:1010428318799250. [PMID: 30192208 DOI: 10.1177/1010428318799250] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Radiation therapy is one of the choices to treat malignant tumors. In radiation therapy, existence of radiation-resistant cell is a major problem to overcome. We established clinically relevant radioresistant cells that had been obtained by exposing to 2 Gy/day X-rays for more than 30 days. These cells are resistant to 2 Gy/day X-ray exposure and anticancer agents. However, the underlying resistance mechanism remains unclear. We investigated the resistance of clinically relevant radioresistant cells to hydrogen peroxide (H2O2), confirming a degree of resistance. Neither catalase enzyme activity nor aquaporins appeared to be involved in H2O2 resistance. Mitochondrial DNA copy number, adenosine triphosphate (ATP) concentration, and plasma membrane potential were decreased. The timing of H2O2 intake was delayed and lipid peroxidation was decreased. Sensitivity of clinically relevant radioresistant cells to H2O2 was enhanced by 1-palmitoyl-2-(5'-oxo-valeroyl)-sn-glycero-3-phosphocholine administration. These results suggest that the membrane status is a major factor conferring H2O2 resistance in clinically relevant radioresistant cells, and we should further investigate how membrane status could be used to enhance the therapeutic effect on cancer.
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Affiliation(s)
- Kazuo Tomita
- 1 Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yoshikazu Kuwahara
- 1 Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.,2 Department of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Yuko Takashi
- 1 Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.,3 Department of Restorative Dentistry and Endodontology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Kento Igarashi
- 1 Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Taisuke Nagasawa
- 1 Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Hideki Nabika
- 4 Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Yamagata, Japan
| | - Akihiro Kurimasa
- 2 Department of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Manabu Fukumoto
- 5 Department of Molecular Pathology, Tokyo Medical University, Tokyo, Japan
| | - Yoshihiro Nishitani
- 3 Department of Restorative Dentistry and Endodontology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Tomoaki Sato
- 1 Department of Applied Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
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Takashi Y, Tomita K, Kuwahara Y, Nabika H, Igarashi K, Nagasawa T, Kurimasa A, Fukumoto M, Nishitani Y, Sato T. Data on the aquaporin gene expression differences among ρ 0, clinically relevant radioresistant, and the parental cells of human cervical cancer and human tongue squamous cell carcinoma. Data Brief 2018; 20:402-410. [PMID: 30175205 PMCID: PMC6116339 DOI: 10.1016/j.dib.2018.08.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/23/2018] [Accepted: 08/08/2018] [Indexed: 01/19/2023] Open
Abstract
We present data about mitochondrial DNA (mtDNA) copy number and aquaporin (AQP) gene expression in clinically radioresistant (CRR), ρ0, and their parental cells from human cervical cancer and human tongue squamous cell carcinoma. In both ρ0 and CRR cells, the mtDNA copy number was lower than for the parental strain. In addition, the obtained data suggest an association between the gene expression levels of AQP (1, 3, 8, and 9) and the difference in hydrogen peroxide (H2O2) sensitivity between ρ0 and CRR cells. Here, the composition of cell culture medium differs between CRR and ρ0 cells. To compare the gene expression of AQPs between ρ0 and CRR cells, therefore, we showed the data as the ratio to that in their parental cells.
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Affiliation(s)
- Yuko Takashi
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan.,Department of Restorative Dentistry and Endodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Kazuo Tomita
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Yoshikazu Kuwahara
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan.,Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1, Fukumuro, Aoba, Miyagino, Sendai, Miyagi 983-8536, Japan
| | - Hideki Nabika
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Kento Igarashi
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Taisuke Nagasawa
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Akihiro Kurimasa
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1, Fukumuro, Aoba, Miyagino, Sendai, Miyagi 983-8536, Japan
| | - Manabu Fukumoto
- Department of Molecular Pathology, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku, Tokyo 160-0022, Japan
| | - Yoshihiro Nishitani
- Department of Restorative Dentistry and Endodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Tomoaki Sato
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
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Clinically relevant radioresistant cell line: a simple model to understand cancer radioresistance. Med Mol Morphol 2017; 50:195-204. [PMID: 29067564 DOI: 10.1007/s00795-017-0171-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 10/18/2017] [Indexed: 12/20/2022]
Abstract
Radiotherapy (RT) is one of the major modalities for the treatment of human cancers and has been established as an excellent local treatment for malignant tumors. Conventional fractionated RT consists of 2-Gy X-rays, fractionated once a day, 5 days a week for 5-7 weeks in total 60 Gy. The efficacy of RT depends on the existence of radioresistant cells, which remains one of the most critical obstacles in RT and radio-chemotherapy. To improve the efficacy of RT, understanding the characteristics of radioresistant cells is one of the important subjects in radiation biology. Several studies have been reported to find out molecules implicated in radioresistance. However, it is noteworthy that cellular radioresistance has been mainly studied among cells with different genetic backgrounds and different origins. Therefore, making a system to compare between radioresistant and sensitive cells with the isogenic background is required. In this review, some aspects of cellular radioresistance mainly focusing on clinically relevant radioresistant (CRR) cell lines that can continue to proliferate even under exposure to 2-Gy X-rays, once a day, for more than 30 days, which is consistent with the conventional fractionated RT are discussed.
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Wang F, Gao P, Guo L, Meng P, Fan Y, Chen Y, Lin Y, Guo G, Ding G, Wang H. Radio-protective effect and mechanism of 4-Acetamido-2,2,6,6- tetramethylpiperidin-1-oxyl in HUVEC cells. Environ Health Prev Med 2017; 22:14. [PMID: 29165102 PMCID: PMC5664570 DOI: 10.1186/s12199-017-0616-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 03/04/2017] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVES To search for more effective radiation protectors with minimal toxicity, a water-soluble nitroxides Acetamido-Tempol (AA-Tempol) was evaluated for potential radioprotective properties in HUVEC cells (Human Umbilical Vein Endothelial cell line). METHODS To study the anti-radiation effect of AA-Tempol in cell culture, the viability of irradiated HUVEC cells using a clonogenic survival assay was examined. The anti-apoptosis effects of AA-Tempol using Annexin V/propidium iodide staining in a flow cytometry assay was also evaluated. To elucidate the molecular mechanism of the anti-apoptosis effect of AA-Tempol against X-radiation induced HUVEC cell apoptosis, the expression of Bax, Bcl-2 and p53 and caspase-3 were examined. The changes in the level of malondialdehyde (MDA) and glutathione (GSH) in HUVEC cells after X-radiation were also investigated. RESULTS Pretreatment of the HUVEC cells colony with AA-Tempol 1 h before X-radiation significantly increased the colony survival (p < 0.05) compared with the cells without pretreatment. This demonstrates that AA-Tempol provides an effective radiation protection in the irradiated HUVEC cells, thus reducing apoptosis from 20.1 ± 1.3% in 8 Gy X-radiated cells to 12.2 ± 0.9% (1.0 mmol/L-1 AA-Tempol) in AA-Tempo pretreated HUVEC cells. This implies that 1.0 mM AA-Tempol treatment significantly block the increase of caspase-3 activity in radiated HUVEC cells (P < 0.01), causing down-regulation in expressions of Bax and P53 and up-regulation in the expression of Bcl-2. Pretreatment with AA-Tempol also decreased the MDA activities (P < 0.01) and increase the GSH level (P < 0.05) in HUVEC cells compared to the 8Gy X-radiated cells without pretreatment. CONCLUSIONS These observations indicate that AA-Tempol is a potential therapeutic agent against the radiation damage.
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Affiliation(s)
- Feng Wang
- School of Preventive Medicine, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
- Shanxi Province Corps Hospital, Chinese People's Armed Police Forces, Taiyuan, 030006, People's Republic of China
| | - Peng Gao
- School of Preventive Medicine, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Ling Guo
- School of Preventive Medicine, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Ping Meng
- Department of urology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Yuexing Fan
- Shanxi Province Corps Hospital, Chinese People's Armed Police Forces, Taiyuan, 030006, People's Republic of China
| | - Yongbin Chen
- School of Preventive Medicine, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Yanyun Lin
- School of Preventive Medicine, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Guozhen Guo
- School of Preventive Medicine, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Guirong Ding
- School of Preventive Medicine, Fourth Military Medical University, Xi'an, 710032, People's Republic of China.
| | - Haibo Wang
- School of Pharmacy, Fourth Military Medical University, Xi'an, 710032, People's Republic of China.
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IL-6 controls resistance to radiation by suppressing oxidative stress via the Nrf2-antioxidant pathway in oral squamous cell carcinoma. Br J Cancer 2016; 115:1234-1244. [PMID: 27736845 PMCID: PMC5104896 DOI: 10.1038/bjc.2016.327] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 09/12/2016] [Accepted: 09/14/2016] [Indexed: 12/21/2022] Open
Abstract
Background: In promoting tumour malignancy IL-6 signalling is considered to have an important role. However, the biological roles of IL-6 on radiosensitivity in oral squamous cell carcinoma (OSCC) remain largely unclear. The objective of this study is to determine the effects and molecular mechanisms of IL-6 on radiosensitivity in OSCC. Methods: Two OSCC cell lines, and OSCC tissue samples with radioresistant cells were used. We examined the effects of IL-6, or tocilizumab, a humanised anti-human IL-6 receptor antibody, or both on radiosensitivity and DNA damage after X-ray irradiation in vitro. In addition, we investigated the involvement of the Nrf2-antioxidant pathway in IL-6-mediated radioresistant mechanisms using OSCC cell lines and tissues. Results: Increased levels of IL-6 suppressed radiation-induced cell death, and the blockade of IL-6 signalling by tocilizumab sensitised tumour cells to radiation. The radioresistant effect of IL-6 was associated with decreased DNA damage after radiation. We also found that IL-6 promotes the activation of not only the downstream molecule STAT3 but also the Nrf2-antioxidant pathway, leading to a significant decrease in oxidative stress by upregulating Mn-SOD. Conclusions: These results indicate that the blockade of IL-6 signalling combined with conventional radiotherapy could augment the treatment response and survival rate in patients with radioresistant OSCC.
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Fractionated radiation exposure amplifies the radioresistant nature of prostate cancer cells. Sci Rep 2016; 6:34796. [PMID: 27703211 PMCID: PMC5050515 DOI: 10.1038/srep34796] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 09/19/2016] [Indexed: 12/20/2022] Open
Abstract
The risk of recurrence following radiation therapy remains high for a significant number of prostate cancer patients. The development of in vitro isogenic models of radioresistance through exposure to fractionated radiation is an increasingly used approach to investigate the mechanisms of radioresistance in cancer cells and help guide improvements in radiotherapy standards. We treated 22Rv1 prostate cancer cells with fractionated 2 Gy radiation to a cumulative total dose of 60 Gy. This process selected for 22Rv1-cells with increased clonogenic survival following subsequent radiation exposure but increased sensitivity to Docetaxel. This RR-22Rv1 cell line was enriched in S-phase cells, less susceptible to DNA damage, radiation-induced apoptosis and acquired enhanced migration potential, when compared to wild type and aged matched control 22Rv1 cells. The selection of radioresistant cancer cells during fractionated radiation therapy may have implications in the development and administration of future targeted therapy in conjunction with radiation therapy.
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Wu CH, Wu X, Zhang HW. Inhibition of acquired-resistance hepatocellular carcinoma cell growth by combining sorafenib with phosphoinositide 3-kinase and rat sarcoma inhibitor. J Surg Res 2016; 206:371-379. [PMID: 27884331 DOI: 10.1016/j.jss.2016.08.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 07/03/2016] [Accepted: 08/03/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND To provide support for combined usage of phosphoinositide 3-kinase (PI3K) inhibitors or mitogen-activated protein kinase pathway inhibitors together with sorafenib in treatment of sorafenib-resistant hepatocellular carcinoma. MATERIALS AND METHODS The sorafenib-resistant cell lines were established to evaluate the effects of MK-2206 2HCL, a dual PI3K/mammalian target of rapamycin (mTOR) inhibitor, and PD0325901, an rat sarcoma (RAS) and/or extracellular signal-regulated kinase (ERK) inhibitor, on cell proliferation and apoptosis, as both single and combined treatments with sorafenib. In addition, multidrug resistance 1 gene expression, mutation status of key members in PI3K/mTOR, and RAS/ERK pathways and pathway activation were analyzed to identify predictors of drug response. RESULTS Molecular studies reveal that combining MK-2206 2HCL or PD0325901 with sorafenib not only has a synergistic effect, in suppressing PI3K/protein kinase B/mTOR and RAS/MEK/ERK signaling more effectively than either treatment alone, but also prevents the cross activation of the other pathway that occurs with single treatments in both sorafenib sensitive and resistant lines. PD0325901 exhibited a stronger synergic effect with sorafenib than MK-2206 2HCL. Sorafenib-resistant cell lines were characterized by activation of both of the two pathways, as indicated by multidrug resistance 1 gene expression profiles and pathway activity analysis. CONCLUSIONS Our studies have showed that both inhibitors of PI3K/mTOR and RAS/ERK signaling are potentially effective antihepatocellular carcinoma drugs especially in treating sorafenib-resistant hepatocellular carcinoma.
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Affiliation(s)
- Chang-Hao Wu
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Xiang Wu
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Hong-Wei Zhang
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China.
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Kuwahara Y, Roudkenar MH, Suzuki M, Urushihara Y, Fukumoto M, Saito Y, Fukumoto M. The Involvement of Mitochondrial Membrane Potential in Cross-Resistance Between Radiation and Docetaxel. Int J Radiat Oncol Biol Phys 2016; 96:556-65. [PMID: 27681752 DOI: 10.1016/j.ijrobp.2016.07.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 06/30/2016] [Accepted: 07/01/2016] [Indexed: 01/18/2023]
Abstract
PURPOSE To understand the molecular mechanisms underlying cancer cell radioresistance, clinically relevant radioresistant (CRR) cells that continue to proliferate during exposure to 2 Gy/day X-rays for more than 30 days were established. A modified high-density survival assay for anticancer drug screening revealed that CRR cells were resistant to an antimicrotubule agent, docetaxel (DTX). The involvement of reactive oxygen species (ROS) from mitochondria (mtROS) in the cross-resistance to X-rays and DTX was studied. METHODS AND MATERIALS Sensitivity to anticancer agents was determined by a modified high-density cell survival or water-soluble tetrazolium salt assay. DTX-induced mtROS generation was determined by MitoSOX red staining. JC-1 staining was used to visualize mitochondrial membrane potential. DTX-induced DNA double-strand breaks were determined by γ-H2AX staining. To obtain mitochondrial DNA-lacking (ρ(0)) cells, the cells were cultured for 3 to 4 weeks in medium containing ethidium bromide. RESULTS Treatment with DTX increased mtROS in parental cells but not in CRR cells. DTX induced DNA double-strand breaks in parental cells. The mitochondrial membrane potential of CRR cells was lower in CRR cells than in parental cells. Depletion of mtDNA induced DTX resistance in parental cells. Treatment with dimethyl sulfoxide also induced DTX resistance in parental cells. CONCLUSIONS The mitochondrial dysfunction observed in CRR cells contributes to X-ray and DTX cross-resistance. The activation of oxidative phosphorylation in CRR cells may represent an effective approach to overcome radioresistant cancers. In general, the overexpression of β-tubulin or multidrug efflux pumps is thought to be involved in DTX resistance. In the present study, we discovered another DTX resistant mechanism by investigating CRR cells.
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Affiliation(s)
- Yoshikazu Kuwahara
- Department of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan; Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Mehryar Habibi Roudkenar
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Masatoshi Suzuki
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Yusuke Urushihara
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Motoi Fukumoto
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Yohei Saito
- Department of Radiopharmacy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Manabu Fukumoto
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan; Department of Molecular Pathology, Tokyo Medical University, Tokyo, Japan.
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Nagahashi M, Matsuda Y, Moro K, Tsuchida J, Soma D, Hirose Y, Kobayashi T, Kosugi SI, Takabe K, Komatsu M, Wakai T. DNA damage response and sphingolipid signaling in liver diseases. Surg Today 2015; 46:995-1005. [PMID: 26514817 DOI: 10.1007/s00595-015-1270-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 10/04/2015] [Indexed: 02/06/2023]
Abstract
Patients with unresectable hepatocellular carcinoma (HCC) cannot generally be cured by systemic chemotherapy or radiotherapy due to their poor response to conventional therapeutic agents. The development of novel and efficient targeted therapies to increase their treatment options depends on the elucidation of the molecular mechanisms that underlie the pathogenesis of HCC. The DNA damage response (DDR) is a network of cell-signaling events that are triggered by DNA damage. Its dysregulation is thought to be one of the key mechanisms underlying the generation of HCC. Sphingosine-1-phosphate (S1P), a lipid mediator, has emerged as an important signaling molecule that has been found to be involved in many cellular functions. In the liver, the alteration of S1P signaling potentially affects the DDR pathways. In this review, we explore the role of the DDR in hepatocarcinogenesis of various etiologies, including hepatitis B and C infection and non-alcoholic steatohepatitis. Furthermore, we discuss the metabolism and functions of S1P that may affect the hepatic DDR. The elucidation of the pathogenic role of S1P may create new avenues of research into therapeutic strategies for patients with HCC.
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Affiliation(s)
- Masayuki Nagahashi
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| | - Yasunobu Matsuda
- Department of Medical Technology, Niigata University Graduate School of Health Sciences, 2-746 Asahimachi-dori, Chuo-ku, Niigata, 951-8518, Japan
| | - Kazuki Moro
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Junko Tsuchida
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Daiki Soma
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Yuki Hirose
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Takashi Kobayashi
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Shin-Ichi Kosugi
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Kazuaki Takabe
- Division of Surgical Oncology, Department of Surgery, Virginia Commonwealth University School of Medicine and the Massey Cancer Center, West Hospital 7-402, 1200 East Broad Street, Richmond, VA, 23298-0011, USA
| | - Masaaki Komatsu
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Toshifumi Wakai
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
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Saito Y, Abiko R, Kishida A, Kuwahara Y, Yamamoto Y, Yamamoto F, Fukumoto M, Ohkubo Y. Loss of EGF-dependent cell proliferation ability on radioresistant cell HepG2-8960-R. Cell Biochem Funct 2015; 33:73-9. [PMID: 25663666 DOI: 10.1002/cbf.3090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 12/10/2014] [Accepted: 12/11/2014] [Indexed: 01/29/2023]
Abstract
Acquired radioresistance of cancer cells interferes with radiotherapy and increases the probability of cancer recurrence. HepG2-8960-R, which is one of several clinically relevant radioresistant (CRR) cell lines, has a high tolerance to the repeated clinically relevant doses of X-ray radiation. In this study, HepG2-8960-R had slightly lower cell proliferation ability than HepG2 in the presence of FBS. In particular, epidermal growth factor (EGF) hardly enhanced cell proliferation and DNA synthesis in HepG2-8960-R. Additionally, EGF could not induce the activation of Erk1/2, because the expression of EGF receptor (EGFR) protein decreased in HepG2-8960-R in accordance with the methylation of the EGFR promoter region. Therefore, cetuximab did not inhibit HepG2-8960-R cell proliferation. Our study showed that HepG2-8960-R had radioresistant and cetuximab-resistant abilities.
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Affiliation(s)
- Yohei Saito
- Department of Radiopharmacy, Tohoku Pharmaceutical University, Sendai, Miyagi, Japan
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39
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Fukumoto M, Amanuma T, Kuwahara Y, Shimura T, Suzuki M, Mori S, Kumamoto H, Saito Y, Ohkubo Y, Duan Z, Sano K, Oguchi T, Kainuma K, Usami S, Kinoshita K, Lee I, Fukumoto M. Guanine nucleotide-binding protein 1 is one of the key molecules contributing to cancer cell radioresistance. Cancer Sci 2014; 105:1351-9. [PMID: 25098609 PMCID: PMC4462352 DOI: 10.1111/cas.12489] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 07/18/2014] [Accepted: 07/22/2014] [Indexed: 01/07/2023] Open
Abstract
Standard fractionated radiotherapy for the treatment of cancer consists of daily irradiation of 2-Gy X-rays, 5 days a week for 5-8 weeks. To understand the characteristics of radioresistant cancer cells and to develop more effective radiotherapy, we established a series of novel, clinically relevant radioresistant (CRR) cells that continue to proliferate with 2-Gy X-ray exposure every 24 h for more than 30 days in vitro. We studied three human and one murine cell line, and their CRR derivatives. Guanine nucleotide-binding protein 1 (GBP1) gene expression was higher in all CRR cells than their corresponding parental cells. GBP1 knockdown by siRNA cancelled radioresistance of CRR cells in vitro and in xenotransplanted tumor tissues in nude mice. The clinical relevance of GBP1 was immunohistochemically assessed in 45 cases of head and neck cancer tissues. Patients with GBP1-positive cancer tended to show poorer response to radiotherapy. We recently reported that low dose long-term fractionated radiation concentrates cancer stem cells (CSCs). Immunofluorescence staining of GBP1 was stronger in CRR cells than in corresponding parental cells. The frequency of Oct4-positive CSCs was higher in CRR cells than in parental cells, however, was not as common as GBP1-positive cells. GBP1-positive cells were radioresistant, but radioresistant cells were not necessarily CSCs. We concluded that GBP1 overexpression is necessary for the radioresistant phenotype in CRR cells, and that targeting GBP1-positive cancer cells is a more efficient method in conquering cancer than targeting CSCs.
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Affiliation(s)
- Motoi Fukumoto
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
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Sato K, Imai T, Okayasu R, Shimokawa T. Heterochromatin domain number correlates with X-ray and carbon-ion radiation resistance in cancer cells. Radiat Res 2014; 182:408-19. [PMID: 25229975 DOI: 10.1667/rr13492.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Although it is known that cancer cells can develop radiation resistance after repeated exposures to X rays, the underlying mechanisms and characteristics of this radiation-induced resistance of cancer cells are not well understood. Additionally, it is not known whether cells that develop X-ray resistance also would develop resistance to other types of radiation such as heavy-ions including carbon ions (C-ion). In this study, we established X-ray resistant cancer cell lines by delivering repeated exposures to X rays, and then assessed whether the cells were resistant to carbon ions. The mouse squamous cell carcinoma cell line, NR-S1, was X irradiated six times with 10 Gy, and the X-ray resistant cancer cells named X60 and ten subclones were established. Significant X-ray resistance was induced in four of the subclones (X60, X60-H2, X60-A3 and X60-B12). The X60 cells and all of the subclones were resistant to carbon ions. The correlation analysis between radioresistance and morphological characteristics of these cells showed that X-ray (R=0.74) and C-ion (R=0.79) resistance correlated strongly with the number of heterochromatin domains. Moreover, the numbers of γ-H2AX foci remaining in irradiated X60 cells and radioresistant subclones X60-A3 and X60-H2 were lower than in the NR-S1 cells after X-ray or C-ion irradiation, indicating that X60 cells and the radioresistant subclones rapidly repaired the DNA double-strand breaks compared with NR-S1 cells. Our findings suggest that the underlying causal mechanisms of X-ray and C-ion radiation resistance may overlap, and that an increase in heterochromatin domain number may be an indicator of X-ray and C-ion resistance.
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Fukumoto M. Radiation pathology: From thorotrast to the future beyond radioresistance. Pathol Int 2014; 64:251-62. [DOI: 10.1111/pin.12170] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 04/13/2014] [Indexed: 12/30/2022]
Affiliation(s)
- Manabu Fukumoto
- Department of Pathology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Japan
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42
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McDermott N, Meunier A, Lynch TH, Hollywood D, Marignol L. Isogenic radiation resistant cell lines: development and validation strategies. Int J Radiat Biol 2014; 90:115-26. [PMID: 24350914 DOI: 10.3109/09553002.2014.873557] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
PURPOSE The comparison of cell lines with differing radiosensitivities and their molecular response to radiation exposure has been used in a number of human cancer models to study the molecular response to radiation. This review proposes to analyze and compare the protocols used by investigators for the development and validation of these isogenic models of radioresistance. CONCLUSION There is large variability in the strategies used to generate and validate isogenic models of radioresistance. Further characterization of these models is required.
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Affiliation(s)
- Niamh McDermott
- Radiation and Urologic Oncology, Applied Radiation Therapy Trinity and Prostate Molecular Oncology Research Group, Discipline of Radiation Therapy, Trinity College Dublin , Ireland
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Sun L, Moritake T, Zheng YW, Suzuki K, Gerelchuluun A, Hong Z, Zenkoh J, Taniguchi H, Tsuboi K. In vitro stemness characterization of radio-resistant clones isolated from a medulloblastoma cell line ONS-76. JOURNAL OF RADIATION RESEARCH 2013; 54:61-69. [PMID: 22951319 PMCID: PMC3534279 DOI: 10.1093/jrr/rrs078] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 07/27/2012] [Indexed: 06/01/2023]
Abstract
One-third of patients with medulloblastoma die due to recurrence after various treatments including radiotherapy. Although it has been postulated that cancer stem-like cells are radio-resistant and play an important role in tumor recurrence, the "stemness" of medulloblastoma cells surviving irradiation has not yet been elucidated. Using a medulloblastoma cell line ONS-76, cells that survived gamma irradiation were investigated on their "stemness" in vitro. From 10 500 cells, 20 radio-resistant clones were selected after gamma ray irradiation (5 Gy × two fractions) using the replica micro-well technique. These 20 resistant clones were screened for CD133 positivity by flow cytometry followed by side population assay, tumor sphere formation assay and clonogenic survival assay. Results revealed CD133 fractions were significantly elevated in three clones, which also exhibited significantly increased levels of tumor sphere formation ability and side population fraction. Clonogenic survival assay demonstrated that their radio-resistance was significantly higher than the parental ONS-76. This may support the hypothesis that a small number of cancer stem-like cells (CSCs) are the main culprits in local recurrence after radiotherapy, and disruption of the resistance mechanism of these CSCs is a critical future issue in improving the outcome of patients with medulloblastoma.
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Affiliation(s)
- Lue Sun
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Takashi Moritake
- Proton Medical Research Center, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Yun-Wen Zheng
- Department of Regenerative Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Kenshi Suzuki
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Ariungerel Gerelchuluun
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Zhengshan Hong
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Junko Zenkoh
- Proton Medical Research Center, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Hideki Taniguchi
- Department of Regenerative Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Koji Tsuboi
- Proton Medical Research Center, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
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Fujimaki S, Matsuda Y, Wakai T, Sanpei A, Kubota M, Takamura M, Yamagiwa S, Yano M, Ohkoshi S, Aoyagi Y. Blockade of ataxia telangiectasia mutated sensitizes hepatoma cell lines to sorafenib by interfering with Akt signaling. Cancer Lett 2012; 319:98-108. [PMID: 22265862 DOI: 10.1016/j.canlet.2011.12.043] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 12/21/2011] [Accepted: 12/22/2011] [Indexed: 12/21/2022]
Abstract
Sorafenib is a multi-kinase inhibitor applicable to hepatocellular carcinoma (HCC), but its limited therapeutic effects are a major problem to be solved. Here, we show that blockade of ataxia telangiectasia mutated (ATM) improves the antitumor effects of sorafenib. When hepatoma cell lines HepG2 and PLC/PRF/5 were treated with sorafenib plus ATM small inhibitory RNAs, ATM inhibitor KU55933 or caffeine, Akt signaling was suppressed and the cytotoxic effects were significantly potentiated. Moreover, ATM inhibition effectively suppressed the sorafenib-induced cell migration. Taken together, manipulation of ATM activity might be a useful strategy for improving sorafenib treatment of HCC.
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Affiliation(s)
- Shun Fujimaki
- Department of Medical Technology, Niigata University Graduate School of Health Sciences, Niigata, Japan
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45
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Matsuda Y, Ichida T, Fukumoto M. Hepatocellular carcinoma and liver transplantation: clinical perspective on molecular targeted strategies. Med Mol Morphol 2011; 44:117-24. [PMID: 21922382 DOI: 10.1007/s00795-011-0547-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 04/20/2011] [Indexed: 12/11/2022]
Abstract
Hepatocellular carcinoma (HCC) has an aggressive clinical course with frequent recurrence and metastasis. Orthotopic liver transplantation has been the only curative tool for unresectable HCC; therefore, recent advances in molecular targeted therapy may improve the prognosis of HCC. The multiple kinase inhibitor sorafenib and the macrolide antibiotic rapamycin are currently the most promising agents for treating unresectable HCC. A large population-based clinical trial revealed that sorafenib significantly prolonged the overall survival of HCC patients. However, subsequent clinical studies showed that sorafenib rarely reduced tumor volume and inadequately prolonged survival of patients with severe liver damage. To improve its therapeutic effect, the development of a predictive biomarker and a sorafenib-based combination is awaited. Another molecular targeting agent, rapamycin, has now been considered as a putative agent for preventing tumor recurrence in post-liver transplantation HCC patients, because it not only has immunosuppressive activity but also exerts an anti-tumor effect. In the near future, a combination of molecular targeting agents, such as sorafenib and rapamycin, may become a standard protocol for treating unresectable HCC. For specifying cases with more effective and less harmful modalities, further investigation in clinical and basic research to identify unexpected effects are needed.
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Affiliation(s)
- Yasunobu Matsuda
- Department of Medical Technology, Niigata University Graduate School of Health Sciences, 2-746 Asahimachi-dori, Niigata 951-8518, Japan.
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Abstract
Radiotherapy is a well-established treatment for cancer. However, the existence of radioresistant cells is one of the major obstacles in radiotherapy. In order to understand the mechanism of cellular radioresistance and develop more effective radiotherapy, we have established clinically relevant radioresistant (CRR) cell lines, which continue to proliferate under daily exposure to 2 Gray (Gy) of X-rays for >30 days. X-ray irradiation significantly induced autophagic cells in parental cells, which was exiguous in CRR cells, suggesting that autophagic cell death is involved in cellular radiosensitivity. An autophagy inducer, rapamycin sensitized CRR cells to the level of parental cells and suppressed cell growth. An autophagy inhibitor, 3-methyladenine induced radioresistance of parental cells. Furthermore, inhibition of autophagy by knockdown of Beclin-1 made parental cells radioresistant to acute radiation. These suggest that the suppression of autophagic cell death but not apoptosis is mainly involved in cellular radioresistance. Therefore, the enhancement of autophagy may have a considerable impact on the treatment of radioresistant tumor.
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Kuwahara Y, Mori M, Oikawa T, Shimura T, Ohtake Y, Mori S, Ohkubo Y, Fukumoto M. The modified high-density survival assay is the useful tool to predict the effectiveness of fractionated radiation exposure. JOURNAL OF RADIATION RESEARCH 2010; 51:297-302. [PMID: 20410675 DOI: 10.1269/jrr.09094] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The high-density survival (HDS) assay was originally elaborated to assess cancer cell responses to therapeutic agents under the influence of intercellular communication. Here, we simplified the original HDS assay and studied its applicability for the detection of cellular radioresistance. We have recently defined clinically relevant radioresistant (CRR) cells, which continue to proliferate with daily exposure to 2 gray (Gy) of X-rays for more than 30 days in vitro. We established human CRR cell lines, HepG2-8960-R from HepG2, and SAS-R1 and -R2 from SAS, respectively. In an attempt to apply the HDS assay to detect radioresistance with clinical relevance, we simplified the original HDS assay by scoring the total number of surviving cells after exposure to X-rays. The modified HDS assay successfully detected radioresistance with clinical relevance. The modified HDS assay detected CRR phenotype, which is not always detectable by clonogenic assay. Therefore, we believe that the modified HDS assay presented in this study is a powerful tool to predict the effectiveness of fractionated radiotherapy against malignant tumors.
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Affiliation(s)
- Yoshikazu Kuwahara
- Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
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