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Jiang M, Huang Z, Chen L, Deng T, Liu J, Wu Y. SIRT5 promote malignant advancement of chordoma by regulating the desuccinylation of c-myc. BMC Cancer 2024; 24:386. [PMID: 38532359 DOI: 10.1186/s12885-024-12140-w] [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: 12/28/2023] [Accepted: 03/18/2024] [Indexed: 03/28/2024] Open
Abstract
Chordoma is a relatively rare and locally aggressive malignant tumor. Sirtuin (SIRT)5 plays pivotal roles in various tumors, but the role of SIRT5 in chordoma has not been found. This study was performed to investigate the regulatory effects of SIRT5 on cell proliferation, migration, and invasion and the underlying mechanism in chordoma. A xenograft tumor mouse model was established to assess tumor growth. Reverse transcription-quantitative polymerase chain reaction was used to analyze the mRNA levels of SIRT5 and c-myc. The effects of SIRT5 and c-myc on cell proliferation, migration, and invasion of chordoma cells were detected by cell counting kit-8, colony formation, and Transwell assays. The interaction between SIRT5 and c-myc was evaluated by co-immunoprecipitation (IP) assay. The succinylation of c-myc was analyzed by IP and Western blot. The results showed that SIRT5 expression was upregulated in chordoma tissues and cells. SIRT5 interacted with c-myc to inhibit the succinylation of c-myc at K369 site in human embryonic kidney (HEK)-293T cells. Silencing of SIRT5 suppressed the cell proliferation, migration, and invasion of chordoma cells, while the results were reversed after c-myc overexpression. Moreover, silencing SIRT5 suppressed tumor growth in mice. These findings suggested that SIRT5 promoted the malignant advancement of chordoma by regulating the desuccinylation of c-myc.
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Affiliation(s)
- Minghui Jiang
- Department of Orthopedics, ChangSha Third Hospital, ChangSha, China
| | - Zheng Huang
- Department of Orthopedics, HuaZhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China
| | - Li Chen
- Department of Orthopedics, ChangSha Third Hospital, ChangSha, China
| | - Ting Deng
- Department of Orthopedics, ChangSha Third Hospital, ChangSha, China
| | - Junpeng Liu
- Department of Orthopedics, BeiJing ChaoYang Hospital, Beijing, China
| | - Yue Wu
- Department of Orthopedics, BeiJing ChaoYang Hospital, Beijing, China.
- Department of Orthopedics, BeiJing ChaoYang Hospital, BeiJing Chao-Yang Hospital, No.8 Gongti South Rd, Chaoyang District, 100020, Beijing, China.
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Locquet MA, Brahmi M, Blay JY, Dutour A. Radiotherapy in bone sarcoma: the quest for better treatment option. BMC Cancer 2023; 23:742. [PMID: 37563551 PMCID: PMC10416357 DOI: 10.1186/s12885-023-11232-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 07/26/2023] [Indexed: 08/12/2023] Open
Abstract
Bone sarcomas are rare tumors representing 0.2% of all cancers. While osteosarcoma and Ewing sarcoma mainly affect children and young adults, chondrosarcoma and chordoma have a preferential incidence in people over the age of 40. Despite this range in populations affected, all bone sarcoma patients require complex transdisciplinary management and share some similarities. The cornerstone of all bone sarcoma treatment is monobloc resection of the tumor with adequate margins in healthy surrounding tissues. Adjuvant chemo- and/or radiotherapy are often included depending on the location of the tumor, quality of resection or presence of metastases. High dose radiotherapy is largely applied to allow better local control in case of incomplete primary tumor resection or for unresectable tumors. With the development of advanced techniques such as proton, carbon ion therapy, radiotherapy is gaining popularity for the treatment of bone sarcomas, enabling the delivery of higher doses of radiation, while sparing surrounding healthy tissues. Nevertheless, bone sarcomas are radioresistant tumors, and some mechanisms involved in this radioresistance have been reported. Hypoxia for instance, can potentially be targeted to improve tumor response to radiotherapy and decrease radiation-induced cellular toxicity. In this review, the benefits and drawbacks of radiotherapy in bone sarcoma will be addressed. Finally, new strategies combining a radiosensitizing agent and radiotherapy and their applicability in bone sarcoma will be presented.
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Affiliation(s)
- Marie-Anaïs Locquet
- Cell Death and Pediatric Cancer Team, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008, Lyon, France
| | - Mehdi Brahmi
- Department of Medical Oncology, Centre Leon Berard, Unicancer Lyon, 69008, Lyon, France
| | - Jean-Yves Blay
- Cell Death and Pediatric Cancer Team, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008, Lyon, France
- Department of Medical Oncology, Centre Leon Berard, Unicancer Lyon, 69008, Lyon, France
- Université Claude Bernard Lyon I, Lyon, France
| | - Aurélie Dutour
- Cell Death and Pediatric Cancer Team, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008, Lyon, France.
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Mayo Clinic Clival Chordoma Case Series: Impact of Endoscopic Training on Clinical Care. Cancers (Basel) 2022; 14:cancers14205104. [PMID: 36291887 PMCID: PMC9600266 DOI: 10.3390/cancers14205104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 11/20/2022] Open
Abstract
The management of clival chordoma in our group shifted around 2013 to mostly endoscopic, and proton beam was introduced for our multidisciplinary team. Consecutive patients who had surgical resection from 1987 to 2021 were reviewed. A total of 58 patients (39 patients after 2013) were analyzed. The mean tumor size was 3.7 cm, and the most common location was the upper clivus (43%). Compared to before 2013, after 2013, the endoscopic endonasal approach was more common (90%, p < 0.001), and more gross or near total resections (64%, p = 0.002) were attained. Ten cases (17%) were revision surgeries referred from elsewhere, and three cases (5%) underwent additional surgery elsewhere before adjuvant radiation. The postoperative cerebrospinal fluid leak occurred in 7%. Post-operative new cranial nerve deficits occurred in 32% before 2013, compared to 2.6% after 2013 (p = 0.004). For cases before 2013, 10 patients (53%) recurred during the median follow-up of 144 months (mean, 142 months), whereas for cases after 2013, seven patients (18%) recurred with a median follow-up of 35 months (mean, 42 months). 5-year progression-free survival was 58%, and 5-year overall survival was 87%. A specialized multidisciplinary team improved the resection rate compared to a historical cohort with an excellent morbidity profile.
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Singh P, Eley J, Saeed A, Bhandary B, Mahmood N, Chen M, Dukic T, Mossahebi S, Rodrigues DB, Mahmood J, Vujaskovic Z, Shukla HD. Effect of hyperthermia and proton beam radiation as a novel approach in chordoma cells death and its clinical implication to treat chordoma. Int J Radiat Biol 2021; 97:1675-1686. [PMID: 34495790 DOI: 10.1080/09553002.2021.1976861] [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: 10/20/2022]
Abstract
PURPOSE Chordoma is a locally aggressive tumor that most commonly affects the base of the skull/clivus, cervical, and sacral spine. Conventional radiotherapy (RT), cannot be safely increased further to improve disease control due to the risk of toxicity to the surrounding critical structures. Tumor-targeted hyperthermia (HT) combined with Proton Beam Radiation Therapy (PBRT) is known to act as a potent radiosensitizer in cancer control. In this study, we investigated whether PBRT efficacy for chordoma can be enhanced in combination with HT as a radiosensitizer. MATERIAL AND METHODS Human chordoma cell lines, U-CH2 and Mug-chor1 were treated in vitro with HT followed by PBRT with variable doses. The colony-forming assay was performed, and dose-response was characterized by linear-quadratic model fits. HSP-70 and Brachyury (TBXT) biomarkers for chordoma aggression levels were quantified by western blot analysis. Gene microarray analysis was performed by U133 Arrays. Pathway Analysis was also performed using IPA bioinformatic software. RESULTS Our findings in both U-CH2 and Mug-Chor1 cell lines demonstrate that hyperthermia followed by PBRT has an enhanced cell killing effect when compared with PBRT-alone (p < .01). Western blot analysis showed HT decreased the expression of Brachyury protein (p < .05), which is considered a biomarker for chordoma tumor aggression. HT with PBRT also exhibited an RT-dose-dependent decrease of Brachyury expression (p < .05). We also observed enhanced HSP-70 expression due to HT, RT, and HT + RT combined in both cell lines. Interestingly, genomic data showed 344 genes expressed by the treatment of HT + RT compared to HT (68 genes) or RT (112 genes) as individual treatment. We also identified activation of death receptor and apoptotic pathway in HT + RT treated cells. CONCLUSION We found that Hyperthermia (HT) combined with Proton Beam Radiation (PBRT) could significantly increase chordoma cell death by activating the death receptor pathway and apoptosis which has the promise to treat metastatic chordoma.
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Affiliation(s)
- Prerna Singh
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - John Eley
- Department of Radiation Oncology, School of Medicine, Vanderbilt University, Nashville, TN, USA
| | - Ali Saeed
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Binny Bhandary
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Nayab Mahmood
- College of Information Science, University of Maryland College Park, MD, USA
| | - Minjie Chen
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Tijana Dukic
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Sina Mossahebi
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Dario B Rodrigues
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Javed Mahmood
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Zeljko Vujaskovic
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Hem D Shukla
- Division of Translational Radiation Sciences (DTRS), Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, USA
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Chen X, Lo SFL, Bettegowda C, Ryan DM, Gross JM, Hu C, Kleinberg L, Sciubba DM, Redmond KJ. High-dose hypofractionated stereotactic body radiotherapy for spinal chordoma. J Neurosurg Spine 2021; 35:674-683. [PMID: 34388713 DOI: 10.3171/2021.2.spine202199] [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: 12/23/2020] [Accepted: 02/02/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Spinal chordoma is locally aggressive and has a high rate of recurrence, even after en bloc resection. Conventionally fractionated adjuvant radiation leads to suboptimal tumor control, and data regarding hypofractionated regimens are limited. The authors hypothesized that neoadjuvant stereotactic body radiotherapy (SBRT) may overcome its intrinsic radioresistance, improve surgical margins, and allow preservation of critical structures during surgery. The purpose of this study is to review the feasibility and early outcomes of high-dose hypofractionated SBRT, with a focus on neoadjuvant SBRT. METHODS Electronic medical records of patients with spinal chordoma treated using image-guided SBRT between 2009 and 2019 at a single institution were retrospectively reviewed. RESULTS Twenty-eight patients with 30 discrete lesions (24 in the mobile spine) were included. The median follow-up duration was 20.8 months (range 2.3-126.3 months). The median SBRT dose was 40 Gy (range 15-50 Gy) in 5 fractions (range 1-5 fractions). Seventeen patients (74% of those with newly diagnosed lesions) received neoadjuvant SBRT, of whom 15 (88%) underwent planned en bloc resection, all with negative margins. Two patients (12%) developed surgical wound-related complications after neoadjuvant SBRT and surgery, and 4 (two grade 3 and two grade 2) experienced postoperative complications unrelated to the surgical site. Of the remaining patients with newly diagnosed lesions, 5 received adjuvant SBRT for positive or close surgical margins, and 1 received SBRT alone. Seven recurrent lesions were treated with SBRT alone, including 2 after failure of prior conventional radiation. The 2-year overall survival rate was 92% (95% confidence interval [CI] 71%-98%). Patients with newly diagnosed chordoma had longer median survival (not reached) than those with recurrent lesions (27.7 months, p = 0.006). The 2-year local control rate was 96% (95% CI 74%-99%). Among patients with radiotherapy-naïve lesions, no local recurrence was observed with a biologically effective dose ≥ 140 Gy, maximum dose of the planning target volume (PTV) ≥ 47 Gy, mean dose of the PTV ≥ 39 Gy, or minimum dose to 80% of the PTV ≥ 36 Gy (5-fraction equivalent doses). All acute toxicities from SBRT were grade 1-2, and no myelopathy was observed. CONCLUSIONS Neoadjuvant high-dose, hypofractionated SBRT for spinal chordoma is safe and does not increase surgical morbidities. Early outcomes at 2 years are promising, although long-term follow-up is pending.
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Affiliation(s)
- Xuguang Chen
- Departments of1Radiation Oncology and Molecular Radiation Sciences
| | | | | | | | - John M Gross
- 4Pathology, Johns Hopkins University School of Medicine; and
| | - Chen Hu
- 5Division of Biostatistics and Bioinformatics, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Sadoughi F, Mirsafaei L, Dana PM, Hallajzadeh J, Asemi Z, Mansournia MA, Montazer M, Hosseinpour M, Yousefi B. The role of DNA damage response in chemo- and radio-resistance of cancer cells: Can DDR inhibitors sole the problem? DNA Repair (Amst) 2021; 101:103074. [PMID: 33640757 DOI: 10.1016/j.dnarep.2021.103074] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 02/12/2021] [Indexed: 12/15/2022]
Abstract
Up to now, many improvements have been made in providing more therapeutic strategies for cancer patients. The lack of susceptibility to common therapies like chemo- and radio-therapy is one of the reasons why we need more methods in the field of cancer therapy. DNA damage response (DDR) is a set of mechanisms which identifies DNA lesions and triggers the repair process for restoring DNA after causing an arrest in the cell cycle. The ability of DDR in maintaining the genome stability and integrity can be favorable to cancerous cells which are exposed to radiation therapy or are treated with chemotherapeutic agents. When DDR mechanisms are error-free in cancer cells, they can escape the expected cellular death and display resistance to treatment. In this regard, targeting different components of DDR can help to increase the susceptibility of advanced tumors to chemo- and radio-therapy.
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Affiliation(s)
- Fatemeh Sadoughi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
| | - Liaosadat Mirsafaei
- Department of Cardiology, Ramsar Campus, Mazandaran University of Medical Sciences, Sari, Iran.
| | - Parisa Maleki Dana
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
| | - Jamal Hallajzadeh
- Department of Biochemistry and Nutrition, Research Center for Evidence-Based Health Management, Maragheh University of Medical Sciences, Maragheh, Iran.
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
| | - Mohammad Ali Mansournia
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
| | - Majid Montazer
- Department of Thorax Surgery, Tuberculosis and Lung Disease Research Center, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Mohammad Hosseinpour
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Bahman Yousefi
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Biochemistry, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
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Locquet MA, Dechaume AL, Berchard P, Abbes L, Pissaloux D, Tirode F, Ramos I, Bedoucha J, Valantin J, Karanian M, Perret R, Gille O, Blay JY, Dutour A. Aldehyde Dehydrogenase, a Therapeutic Target in Chordoma: Analysis in 3D Cellular Models. Cells 2021; 10:cells10020399. [PMID: 33672032 PMCID: PMC7919493 DOI: 10.3390/cells10020399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/29/2021] [Accepted: 02/08/2021] [Indexed: 12/12/2022] Open
Abstract
Chordomas are rare, slow-growing tumors of the axial skeleton. These tumors are locally aggressive and refractory to conventional therapies. Radical surgery and radiation remain the first-line treatments. Despite these aggressive treatments, chordomas often recur and second-line treatment options are limited. The mechanisms underlying chordoma radioresistance remain unknown, although several radioresistant cancer cells have been shown to respond favorably to aldehyde dehydrogenase (ALDH) inhibition. The study of chordoma has been delayed by small patient cohorts and few available models due to the scarcity of these tumors. We thus created cellular 3D models of chordoma by using low-adherence culture systems. Then, we evaluated their radiosensitivity using colony-forming and spheroid size assays. Finally, we determined whether pharmacologically inhibiting ALDH increased their radiosensitivity. We found that 3D cellular models of chordoma (derived from primary, relapse, and metastatic tumors) reproduce the histological and gene expression features of the disease. The metastatic, relapse, and primary spheroids displayed high, medium, and low radioresistance, respectively. Moreover, inhibiting ALDH decreased the radioresistance in all three models.
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Affiliation(s)
- Marie-Anaïs Locquet
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
| | - Anne-Lise Dechaume
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
| | - Paul Berchard
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
| | - Lhorra Abbes
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
| | - Daniel Pissaloux
- Department of Biopathology, Centre Leon Berard, F-69008 Lyon, France;
- Team Genetics, Epigenetics and Biology of Sarcomas, Univ Lyon, Université Claude Bernard Lyon 1, INSERM1052, CNRS5286, Cancer Research Center of Lyon, Centre Leon Berard, F-69008 Lyon, France; (F.T.); (M.K.)
| | - Franck Tirode
- Team Genetics, Epigenetics and Biology of Sarcomas, Univ Lyon, Université Claude Bernard Lyon 1, INSERM1052, CNRS5286, Cancer Research Center of Lyon, Centre Leon Berard, F-69008 Lyon, France; (F.T.); (M.K.)
| | - Inès Ramos
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
| | - Julie Bedoucha
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
| | - Julie Valantin
- Research Pathology Platform, Department of Translational Research and Innovation, Centre Leon Berard, F-69008 Lyon, France;
- Fondation Synergie Lyon Cancer, F-69008 Lyon, France
| | - Marie Karanian
- Department of Biopathology, Centre Leon Berard, F-69008 Lyon, France;
- Team Genetics, Epigenetics and Biology of Sarcomas, Univ Lyon, Université Claude Bernard Lyon 1, INSERM1052, CNRS5286, Cancer Research Center of Lyon, Centre Leon Berard, F-69008 Lyon, France; (F.T.); (M.K.)
| | - Raul Perret
- Department of Biopathology, Institut Bergonié, F-33000 Bordeaux, France;
| | - Olivier Gille
- Orthopedic Spinal Surgery Unit 1, Bordeaux University Hospital, F-33000 Bordeaux, France;
| | - Jean-Yves Blay
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
- Medical Oncology Department, Centre Leon Berard, F-69008 Lyon, France
| | - Aurélie Dutour
- Team Cell Death and Pediatric Cancer, Cancer Initiation and Tumor Cell Identity Department, INSERM1052, CNRS5286, Cancer Research Center of Lyon, F-69008 Lyon, France; (M.-A.L.); (A.-L.D.); (P.B.); (L.A.); (I.R.); (J.B.); (J.-Y.B.)
- Correspondence:
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Hoey C, Ray J, Jeon J, Huang X, Taeb S, Ylanko J, Andrews DW, Boutros PC, Liu SK. miRNA-106a and prostate cancer radioresistance: a novel role for LITAF in ATM regulation. Mol Oncol 2018; 12:1324-1341. [PMID: 29845714 PMCID: PMC6068351 DOI: 10.1002/1878-0261.12328] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/30/2018] [Accepted: 05/01/2018] [Indexed: 01/09/2023] Open
Abstract
Recurrence of high-grade prostate cancer after radiotherapy is a significant clinical problem, resulting in increased morbidity and reduced patient survival. The molecular mechanisms of radiation resistance are being elucidated through the study of microRNA (miR) that negatively regulate gene expression. We performed bioinformatics analyses of The Cancer Genome Atlas (TCGA) dataset to evaluate the association between miR-106a and its putative target lipopolysaccharide-induced TNF-α factor (LITAF) in prostate cancer. We characterized the function of miR-106a through in vitro and in vivo experiments and employed transcriptomic analysis, western blotting, and 3'UTR luciferase assays to establish LITAF as a bona fide target of miR-106a. Using our well-characterized radiation-resistant cell lines, we identified that miR-106a was overexpressed in radiation-resistant cells compared to parental cells. In the TCGA, miR-106a was significantly elevated in high-grade human prostate tumors relative to intermediate- and low-grade specimens. An inverse correlation was seen with its target, LITAF. Furthermore, high miR-106a and low LITAF expression predict for biochemical recurrence at 5 years after radical prostatectomy. miR-106a overexpression conferred radioresistance by increasing proliferation and reducing senescence, and this was phenocopied by knockdown of LITAF. For the first time, we describe a role for miRNA in upregulating ATM expression. LITAF, not previously attributed to radiation response, mediates this interaction. This route of cancer radioresistance can be overcome using the specific ATM kinase inhibitor, KU-55933. Our research provides the first report of miR-106a and LITAF in prostate cancer radiation resistance and high-grade disease, and presents a viable therapeutic strategy that may ultimately improve patient outcomes.
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Affiliation(s)
- Christianne Hoey
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoCanada
- Department of Medical BiophysicsUniversity of TorontoCanada
| | - Jessica Ray
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoCanada
- Department of Medical BiophysicsUniversity of TorontoCanada
| | - Jouhyun Jeon
- Ontario Institute for Cancer ResearchUniversity Health NetworkTorontoCanada
| | - Xiaoyong Huang
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoCanada
| | - Samira Taeb
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoCanada
| | - Jarkko Ylanko
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoCanada
| | - David W. Andrews
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoCanada
- Department of Medical BiophysicsUniversity of TorontoCanada
| | - Paul C. Boutros
- Department of Medical BiophysicsUniversity of TorontoCanada
- Ontario Institute for Cancer ResearchUniversity Health NetworkTorontoCanada
- Department of Pharmacology and ToxicologyUniversity of TorontoCanada
| | - Stanley K. Liu
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoCanada
- Department of Medical BiophysicsUniversity of TorontoCanada
- Department of Radiation OncologyUniversity of TorontoCanada
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