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Almalki YE, Basha MAA, Metwally MI, Zeed NA, Nada MG, Alduraibi SK, Morsy AA, Balata R, Al Attar AZ, Amer MM, Farag MAEAM, Aly SA, Basha AMA, Hamed EM. Validating Brain Tumor Reporting and Data System (BT-RADS) as a Diagnostic Tool for Glioma Follow-Up after Surgery. Biomedicines 2024; 12:887. [PMID: 38672241 PMCID: PMC11048183 DOI: 10.3390/biomedicines12040887] [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: 03/03/2024] [Revised: 04/03/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
Gliomas are a type of brain tumor that requires accurate monitoring for progression following surgery. The Brain Tumor Reporting and Data System (BT-RADS) has emerged as a potential tool for improving diagnostic accuracy and reducing the need for repeated operations. This prospective multicenter study aimed to evaluate the diagnostic accuracy and reliability of BT-RADS in predicting tumor progression (TP) in postoperative glioma patients and evaluate its acceptance in clinical practice. The study enrolled patients with a history of partial or complete resection of high-grade glioma. All patients underwent two consecutive follow-up brain MRI examinations. Five neuroradiologists independently evaluated the MRI examinations using the BT-RADS. The diagnostic accuracy of the BT-RADS for predicting TP was calculated using histopathology after reoperation and clinical and imaging follow-up as reference standards. Reliability based on inter-reader agreement (IRA) was assessed using kappa statistics. Reader acceptance was evaluated using a short survey. The final analysis included 73 patients (male, 67.1%; female, 32.9%; mean age, 43.2 ± 12.9 years; age range, 31-67 years); 47.9% showed TP, and 52.1% showed no TP. According to readers, TP was observed in 25-41.7% of BT-3a, 61.5-88.9% of BT-3b, 75-90.9% of BT-3c, and 91.7-100% of BT-RADS-4. Considering >BT-RADS-3a as a cutoff value for TP, the sensitivity, specificity, and accuracy of the BT-RADS were 68.6-85.7%, 84.2-92.1%, and 78.1-86.3%, respectively, according to the reader. The overall IRA was good (κ = 0.75) for the final BT-RADS classification and very good for detecting new lesions (κ = 0.89). The readers completely agreed with the statement "the application of the BT-RADS should be encouraged" (score = 25). The BT-RADS has good diagnostic accuracy and reliability for predicting TP in postoperative glioma patients. However, BT-RADS 3 needs further improvements to increase its diagnostic accuracy.
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Affiliation(s)
- Yassir Edrees Almalki
- Division of Radiology, Department of Internal Medicine, Medical College, Najran University, Najran 61441, Saudi Arabia;
| | - Mohammad Abd Alkhalik Basha
- Department of Diagnostic Radiology, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt; (M.I.M.); (N.A.Z.); (M.G.N.); (E.M.H.)
| | - Maha Ibrahim Metwally
- Department of Diagnostic Radiology, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt; (M.I.M.); (N.A.Z.); (M.G.N.); (E.M.H.)
| | - Nesma Adel Zeed
- Department of Diagnostic Radiology, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt; (M.I.M.); (N.A.Z.); (M.G.N.); (E.M.H.)
| | - Mohamad Gamal Nada
- Department of Diagnostic Radiology, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt; (M.I.M.); (N.A.Z.); (M.G.N.); (E.M.H.)
| | | | - Ahmed A. Morsy
- Department of Neurosurgery, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt;
| | - Rawda Balata
- Department of Clinical Oncology and Nuclear Medicine, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt; (R.B.); (A.Z.A.A.)
| | - Ahmed Z. Al Attar
- Department of Clinical Oncology and Nuclear Medicine, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt; (R.B.); (A.Z.A.A.)
| | - Mona M. Amer
- Department of Neurology, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt;
| | | | - Sameh Abdelaziz Aly
- Department of Diagnostic Radiology, Faculty of Human Medicine, Benha University, Benha 13511, Egypt;
| | | | - Enas Mahmoud Hamed
- Department of Diagnostic Radiology, Faculty of Human Medicine, Zagazig University, Zagazig 44519, Egypt; (M.I.M.); (N.A.Z.); (M.G.N.); (E.M.H.)
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Zhuang Q, Liu C, Hu Y, Liu Y, Lyu Y, Liao Y, Chen L, Yang H, Mao Y. Identification of RP11-770J1.4 as immune-related lncRNA regulating the CTXN1-cGAS-STING axis in histologically lower-grade glioma. MedComm (Beijing) 2023; 4:e458. [PMID: 38116063 PMCID: PMC10728758 DOI: 10.1002/mco2.458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 11/24/2023] [Accepted: 11/30/2023] [Indexed: 12/21/2023] Open
Abstract
Human gliomas are lethal brain cancers. Emerging evidence revealed the regulatory role of long noncoding RNAs (lncRNAs) in tumors. Here, we performed a comprehensive analysis of the expression profiles of RNAs in histologically lower-grade glioma (LGG). Enrichment analysis revealed that glioma is influenced by immune-related signatures. Survival analysis further established the close correlation between network features and glioma prognosis. Subsequent experiments showed lncRNA RP11-770J1.4 regulates CTXN1 expression through hsa-miR-124-3p. Correlation analysis identified lncRNA RP11-770J1.4 was immune related, specifically involved in the cytosolic DNA sensing pathway. Downregulated lncRNA RP11-770J1.4 resulted in increased spontaneous gene expression of the cGAS-STING pathway. Single-cell RNA sequencing analysis, along with investigations in a glioblastoma stem cell model and patient sample analysis, demonstrated the predominant localization of CTXN1 within tumor cores rather than peripheral regions. Immunohistochemistry staining established a negative correlation between CTXN1 expression and infiltration of CD8+ T cells. In vivo, Ctxn1 knockdown in GL261 cells led to decreased tumor burden and improved survival while increasing infiltration of CD8+ T cells. These findings unveil novel insights into the lncRNA RP11-770J1.4-CTXN1 as a potential immune regulatory axis, highlighting its therapeutic implications for histologically LGGs.
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Affiliation(s)
- Qiyuan Zhuang
- Department of NeurosurgeryHuashan Hospital, Fudan UniversityShanghaiChina
| | - Chaxian Liu
- Department of NeurosurgeryHuashan Hospital, Fudan UniversityShanghaiChina
| | - Yihan Hu
- School of Life Sciences, Fudan UniversityShanghaiChina
| | - Ying Liu
- Department of PathologySchool of Basic Medical Sciences, Fudan UniversityShanghaiChina
| | - Yingying Lyu
- Department of NeurosurgeryHuashan Hospital, Fudan UniversityShanghaiChina
| | - Yuheng Liao
- Key Laboratory of Medical Epigenetics and Metabolism and Molecular and Cell Biology LabInstitute of Biomedical Sciences, Shanghai Medical College, Fudan UniversityShanghaiChina
| | - Liang Chen
- Department of NeurosurgeryHuashan Hospital, Fudan UniversityShanghaiChina
- National Center for Neurological DisordersHuashan Hospital, Fudan UniversityShanghaiChina
| | - Hui Yang
- Department of NeurosurgeryHuashan Hospital, Fudan UniversityShanghaiChina
- National Center for Neurological DisordersHuashan Hospital, Fudan UniversityShanghaiChina
- Institute for Translational Brain ResearchShanghai Medical College, Fudan UniversityShanghaiChina
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghaiChina
| | - Ying Mao
- Department of NeurosurgeryHuashan Hospital, Fudan UniversityShanghaiChina
- School of Life Sciences, Fudan UniversityShanghaiChina
- National Center for Neurological DisordersHuashan Hospital, Fudan UniversityShanghaiChina
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghaiChina
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Adjuvant Temozolomide for the Treatment of Glioblastoma: A Meta-analysis of Randomized Controlled Studies. Clin Neuropharmacol 2021; 44:132-137. [PMID: 34039842 DOI: 10.1097/wnf.0000000000000458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The efficacy of adjuvant temozolomide to radiotherapy for glioblastoma remained elusive. This meta-analysis aimed to explore the influence of radiotherapy plus adjuvant temozolomide on the efficacy and safety for glioblastoma. METHODS We have searched several databases including PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases through November 2020 and included randomized controlled trials assessing the efficacy and safety of adjuvant temozolomide to radiotherapy for glioblastoma. RESULTS Seven randomized controlled trials and 1900 patients were included in the meta-analysis. Overall, compared with radiotherapy for glioblastoma, adjuvant temozolomide was associated with significantly increased survival rate [odds ratio (OR), 4.04; 95% confidence interval (CI), 2.61-6.24; P < 0.00001], median progression-free survival (mean difference, 0.55; 95% CI, 0.03-1.07; P = 0.04), and hematological complications (OR, 4.12; 95% CI, 1.43-11.88; P = 0.009), but revealed no remarkable influence on adverse events (OR, 0.87; 95% CI, 0.36-2.09; P = 0.75) or serious adverse events (OR, 2.20; 95% CI, 0.55-8.70; P = 0.26). CONCLUSIONS Adjuvant temozolomide in combination with radiotherapy may improve the treatment efficacy for glioblastoma.
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Wang Y, Feng Y. The efficacy and safety of radiotherapy with adjuvant temozolomide for glioblastoma: A meta-analysis of randomized controlled studies. Clin Neurol Neurosurg 2020; 196:105890. [DOI: 10.1016/j.clineuro.2020.105890] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 02/27/2020] [Accepted: 05/01/2020] [Indexed: 12/19/2022]
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Bai J, Xiao L, Tao Z, Cao B, Han Y, Fan W, Kong X, Ma X, Gao Y, Bi L, Chen W, Shi B, Liu X. Ectopic expression of E3 ubiquitin-protein ligase 2 in glioma and enhances resistance to apoptosis through activating nuclear factor κ-light-chain-enhancer of B cells. Oncol Lett 2018; 16:4391-4399. [PMID: 30214574 PMCID: PMC6126155 DOI: 10.3892/ol.2018.9153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 03/07/2018] [Indexed: 12/31/2022] Open
Abstract
Nuclear factor κ-light-chain-enhancer of B cells (NF-κB) is one of the most important tumorigenic factors. Although it has been established that NF-κB is overly activated in human glioma cells, the molecular mechanisms that lead to the signal transduction to NF-κB and thereby the induction of resistance to apoptosis remain poorly understood. The present study demonstrated that mRNA and protein levels of E3 ubiquitin-protein ligase 2 (MIB2) were markedly upregulated in glioma cell lines and clinical samples. Immunohistochemical analysis also revealed high levels of MIB2 expression in glioma specimens. Ectopic overexpression of MIB2 was established in glioma cell lines to investigate its fundamental roles in the response of human glioma to apoptotic inducers. The results indicated that ultraviolet irradiation-induced cell apoptosis was inhibited with MIB2 overexpression in glioma cells. Notably, knockdown of MIB2 using RNA interference was able to increase the sensitivity of glioma cells to the pro-apoptotic agents. The present study identified that MIB2 induces NF-κB activation and facilitates the resistance of glioma cell to apoptosis. It was proposed that MIB2 may not only be an important hallmark to glioma disease progression, but that it may also offer novel clinical strategies to overcome resistance to cancer therapies.
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Affiliation(s)
- Jian Bai
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China.,Experimental Animal Centre, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning 110032, P.R. China
| | - Li Xiao
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Zhen Tao
- Department of Neurosurgery, General Hospital of Jinan Military Command, Jinan, Shandong 250031, P.R. China
| | - Bingzhen Cao
- Experimental Animal Centre, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning 110032, P.R. China
| | - Yong Han
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Wenmei Fan
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Xiangrui Kong
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Xihui Ma
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Yu Gao
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Lili Bi
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Wen Chen
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Bingyi Shi
- Institute of Organ Transplantation, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, P.R. China
| | - Xicheng Liu
- Department of Anesthesia, Shenzhen People's Hospital, Shenzhen, Guangdong 5188020, P.R. China
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Wang Y, Feng C, He H, He J, Wang J, Li X, Wang S, Li W, Hou J, Liu T, Fang D, Xie SQ. Sensitization of TRPV1 receptors by TNF-α orchestrates the development of vincristine-induced pain. Oncol Lett 2018; 15:5013-5019. [PMID: 29552137 PMCID: PMC5840530 DOI: 10.3892/ol.2018.7986] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 01/16/2018] [Indexed: 12/15/2022] Open
Abstract
Vincristine is one of the most common anticancer drugs clinically employed in the treatment of various malignancies. A major side effect associated with vincristine is the development of neuropathic pain, which is not readily relieved by available analgesics. Although efforts have been made to identify the pathogenesis of vincristine-induced neuropathic pain, the mechanisms underlying its pathogenesis have not been fully elucidated. In the present study, a neuropathic pain model was established in Sprague-Dawley rats by intraperitoneal injection of vincristine sulfate. The results demonstrated that vincristine administration induced the upregulation of transient receptor potential cation channel subfamily V member 1 (TRPV1) protein expression and current density in dorsal root ganglion (DRG) nociceptive neurons. Consistently, inhibition of TRPV1 with capsazepine alleviated vincristine-induced mechanical allodynia and thermal hyperalgesia in rats. Furthermore, vincristine administration induced the upregulation of tumor necrosis factor (TNF)-α production in DRGs, and inhibition of TNF-α synthesis with thalidomide in vivo reversed TRPV1 protein expression, as well as pain hypersensitivity induced by vincristine in rats. The present results suggested that TNF-α could sensitize TRPV1 by promoting its expression, thus leading to mechanical allodynia and thermal hyperalgesia in vincristine-treated rats. Taken together, these findings may enhance our understanding of the pathophysiological mechanisms underlying vincristine-induced pain.
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Affiliation(s)
- Ying Wang
- Department of Medical Imaging, The First Affiliated Hospital of Henan University, Kaifeng, Henan 475001, P.R. China
| | - Chenyang Feng
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Haoying He
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Jinjin He
- Department of Clinic Pharmacy, The First Affiliated Hospital of Henan University, Kaifeng, Henan 475001, P.R. China
| | - Jun Wang
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Xiaomin Li
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Shasha Wang
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Wei Li
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Jiuzhou Hou
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Tong Liu
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Dong Fang
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Song-Qiang Xie
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
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Zhang J, Liu H, Du X, Guo Y, Chen X, Wang S, Fang J, Cao P, Zhang B, Liu Z, Zhang W. Increasing of Blood-Brain Tumor Barrier Permeability through Transcellular and Paracellular Pathways by Microbubble-Enhanced Diagnostic Ultrasound in a C6 Glioma Model. Front Neurosci 2017; 11:86. [PMID: 28280455 PMCID: PMC5322268 DOI: 10.3389/fnins.2017.00086] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 02/09/2017] [Indexed: 11/13/2022] Open
Abstract
Most of the anticancer agents cannot be efficiently delivered into the brain tumor because of the existence of blood-brain tumor barrier (BTB). The objective of this study was to explore the effect of microbubble-enhanced diagnostic ultrasound (MEUS) on the BTB permeability and the possible mechanism. Glioma-bearing rats were randomized into three groups as follows: the microbubble-enhanced continued diagnostic ultrasound (MECUS) group; the microbubble-enhanced intermittent diagnostic ultrasound (MEIUS) group and the control group. The gliomas were insonicated through the skull with a diagnostic ultrasound and injected with microbubbles through the tail veins. Evans Blue (EB) and dynamic contrast-enhanced-MRI were used to test changes in the BTB permeability. Confocal laser scanning microscopy was used to observe the deposition of the EB in the tumor tissues. The distribution and expression of junctional adhesion molecule-A (JAM-A) and calcium-activated potassium channels (KCa channels) were detected by a Western blot, qRT-PCR, and immunohistochemical staining. In the MEUS groups, the EB extravasation (11.0 ± 2.2 μg/g in MECUS group and 17.9 ± 2.3 μg/g in MEIUS group) exhibited a significant increase compared with the control group (5.3 ± 0.9 μg/g). The MEIUS group had more EB extravasation than the MECUS group. The Ktrans value of the dynamic contrast-enhanced-MRI in the MEUS groups was higher than that of the control group and correlated strongly with the EB extravasation in the tumor (R2 = 0.97). This showed that the Ktrans value might be a non-invasive method to evaluate the BTB permeability in rat glioma after microbubble-enhanced ultrasound treatment.Western blot, qRT-PCR and immunohistochemical staining revealed that MEUS increased the KCa channels expression and reduced JAM-A expression in glioma. This change was more obvious in the MEIUS group than in the MECUS group. The results demonstrated that MEUS effectively increased the BTB permeability in glioma. The mechanisms might involve the up-regulation of KCa channels expression and affecting the formation of tight junctions in the BTB by a reduction of JAM-A expression. These findings might provide some new guidance for glioma drug therapy.
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Affiliation(s)
- Jinlong Zhang
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | - Heng Liu
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | - Xuesong Du
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | - Yu Guo
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | - Xiao Chen
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | - Shunan Wang
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | - Jingqin Fang
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | | | - Bo Zhang
- Four and the State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Daping Hospital, Third Military Medical University Chongqing, China
| | - Zheng Liu
- Department of Ultrasound, Xinqiao Hospital, Third Military Medical University Chongqing, China
| | - Weiguo Zhang
- Department of Radiology, Research Institute of Surgery, Daping Hospital, Third Military Medical UniversityChongqing, China; Chongqing Clinical Research Center for Imaging and Nuclear MedicineChongqing, China
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Sidlauskas K, Sidlauskiene R, Li N, Liobikas J. 5-Hydroxy-1,4-naphthalenedione exerts anticancer effects on glioma cells through interaction with the mitochondrial electron transport chain. Neurosci Lett 2017; 639:207-214. [PMID: 28069455 DOI: 10.1016/j.neulet.2017.01.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 01/04/2017] [Accepted: 01/05/2017] [Indexed: 01/19/2023]
Abstract
Survival of patients with glioblastoma remains within the range of several months despite advances in therapeutic options. We have already shown that 5-hydroxy-1,4-naphthalenedione (juglone) exerts antiproliferative, anti-invasive, and cytotoxic effects on glioma C6 cells. Here, we further revealed that juglone is relatively selective to glioma cells as compared to the normal glial culture, and investigated its mechanisms of action. The incubation of glioma C6 cells with juglone generated high levels of reactive oxygen species (ROS). The produced ROS accounted for the anticancer effect of juglone as antioxidant N-acetylcysteine reduced both cytotoxic and antiproliferative activities of juglone. Furthermore, high resolution respirometry revealed that juglone decreased oxygen consumption mainly by affecting pyruvate/malate- and glutamate/malate-induced mitochondrial respiration. The inhibition of respiratory complex I by amytal decreased juglone-triggered generation of ROS and diminished its anticancer activity. Thus, our results indicate that juglone generates ROS through interaction with respiratory complex I in glioma C6 cells, and, in turn, induces the anticancer effects.
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Affiliation(s)
- Kastytis Sidlauskas
- Laboratory of Biochemistry, Neuroscience Institute, Lithuanian University of Health Sciences, Kaunas, Lithuania; Division of Neuropathology, Institute of Neurology, University College London, UK.
| | - Ruta Sidlauskiene
- Laboratory of Biochemistry, Neuroscience Institute, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Ningning Li
- Division of Neuropathology, Institute of Neurology, University College London, UK
| | - Julius Liobikas
- Laboratory of Biochemistry, Neuroscience Institute, Lithuanian University of Health Sciences, Kaunas, Lithuania
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Liu K, Shi X, Wang T, Ai P, Gu W, Ye L. Terbium-doped manganese carbonate nanoparticles with intrinsic photoluminescence and magnetic resonance imaging capacity. J Colloid Interface Sci 2017; 485:25-31. [DOI: 10.1016/j.jcis.2016.09.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 09/05/2016] [Accepted: 09/06/2016] [Indexed: 10/21/2022]
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Nicoletti NF, Sénécal J, da Silva VD, Roxo MR, Ferreira NP, de Morais RLT, Pesquero JB, Campos MM, Couture R, Morrone FB. Primary Role for Kinin B1 and B2 Receptors in Glioma Proliferation. Mol Neurobiol 2016; 54:7869-7882. [DOI: 10.1007/s12035-016-0265-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 10/26/2016] [Indexed: 11/30/2022]
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11
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Gehring MP, Kipper F, Nicoletti NF, Sperotto ND, Zanin R, Tamajusuku ASK, Flores DG, Meurer L, Roesler R, Filho AB, Lenz G, Campos MM, Morrone FB. P2X7 receptor as predictor gene for glioma radiosensitivity and median survival. Int J Biochem Cell Biol 2015; 68:92-100. [PMID: 26358881 DOI: 10.1016/j.biocel.2015.09.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 08/31/2015] [Accepted: 09/03/2015] [Indexed: 10/23/2022]
Abstract
Glioblastoma multiforme (GBM) is considered the most lethal intracranial tumor and the median survival time is approximately 14 months. Although some glioma cells present radioresistance, radiotherapy has been the mainstay of therapy for patients with malignant glioma. The activation of P2X7 receptor (P2X7R) is responsible for ATP-induced death in various cell types. In this study, we analyzed the importance of ATP-P2X7R pathway in the radiotherapy response P2X7R silenced cell lines, in vivo and human tumor samples. Both glioma cell lines used in this study present a functional P2X7R and the P2X7R silencing reduced P2X7R pore activity by ethidium bromide uptake. Gamma radiation (2Gy) treatment reduced cell number in a P2X7R-dependent way, since both P2X7R antagonist and P2X7R silencing blocked the cell cytotoxicity caused by irradiation after 24h. The activation of P2X7R is time-dependent, as EtBr uptake significantly increased after 24h of irradiation. The radiotherapy plus ATP incubation significantly increased annexin V incorporation, compared with radiotherapy alone, suggesting that ATP acts synergistically with radiotherapy. Of note, GL261 P2X7R silenced-bearing mice failed in respond to radiotherapy (8Gy) and GL261 WT-bearing mice, that constitutively express P2X7R, presented a significant reduction in tumor volume after radiotherapy, showing in vivo that functional P2X7R expression is essential for an efficient radiotherapy response in gliomas. We also showed that a high P2X7R expression is a good prognostic factor for glioma radiosensitivity and survival probability in humans. Our data revealed the relevance of P2X7R expression in glioma cells to a successful radiotherapy response, and shed new light on this receptor as a useful predictor of the sensitivity of cancer patients to radiotherapy and median survival.
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Affiliation(s)
- Marina P Gehring
- PUCRS, Programa de Pós-Graduação em Biologia Celular e Molecular, Laboratório de Farmacologia Aplicada, Av. Ipiranga, 6681, 90619-900 Porto Alegre, RS, Brazil.
| | - Franciele Kipper
- Laboratório de Sinalização e Plasticidade Celular, UFRGS, Av. Bento Gonçalves, 9500, 91501-970 Porto Alegre, RS, Brazil.
| | - Natália F Nicoletti
- PUCRS, Programa de Pós-Graduação em Biologia Celular e Molecular, Laboratório de Farmacologia Aplicada, Av. Ipiranga, 6681, 90619-900 Porto Alegre, RS, Brazil.
| | - Nathalia D Sperotto
- PUCRS, Programa de Pós-Graduação em Biologia Celular e Molecular, Laboratório de Farmacologia Aplicada, Av. Ipiranga, 6681, 90619-900 Porto Alegre, RS, Brazil.
| | - Rafael Zanin
- PUCRS, Programa de Pós-Graduação em Biologia Celular e Molecular, Laboratório de Farmacologia Aplicada, Av. Ipiranga, 6681, 90619-900 Porto Alegre, RS, Brazil.
| | - Alessandra S K Tamajusuku
- Laboratório de Sinalização e Plasticidade Celular, UFRGS, Av. Bento Gonçalves, 9500, 91501-970 Porto Alegre, RS, Brazil.
| | - Debora G Flores
- Cancer Research Laboratory, University Hospital Research Center (CPE-HCPA), Porto Alegre, RS, Brazil.
| | - Luise Meurer
- Departamento de Patologia, HCPA, UFRGS, Rua Ramiro Barcelos, 2350, 90420-010 Porto Alegre, RS, Brazil.
| | - Rafael Roesler
- Laboratory of Neuropharmacology and Neural Tumor Biology, Department of Pharmacology, Institute for Basic Health Sciences, UFRGS, Porto Alegre, RS, Brazil; Cancer Research Laboratory, University Hospital Research Center (CPE-HCPA), UFRGS, Porto Alegre, RS, Brazil; National Institute for Translational Medicine, Rua Sarmento Leite, 500, Sala 202, 90050-170 Porto Alegre, RS, Brazil.
| | - Aroldo B Filho
- Serviço de Radioterapia, Hospital São Lucas da PUCRS, Av. Ipiranga, 6681, 90619-900 Porto Alegre, RS, Brazil.
| | - Guido Lenz
- Laboratório de Sinalização e Plasticidade Celular, UFRGS, Av. Bento Gonçalves, 9500, 91501-970 Porto Alegre, RS, Brazil.
| | - Maria M Campos
- PUCRS, Instituto de Toxicologia e Farmacologia e Faculdade de Odontologia, Av. Ipiranga, 6681, 90619-900 Porto Alegre, RS, Brazil.
| | - Fernanda B Morrone
- PUCRS, Programa de Pós-Graduação em Biologia Celular e Molecular, Laboratório de Farmacologia Aplicada, Av. Ipiranga, 6681, 90619-900 Porto Alegre, RS, Brazil.
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12
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Tannous BA, Kerami M, Van der Stoop PM, Kwiatkowski N, Wang J, Zhou W, Kessler AF, Lewandrowski G, Hiddingh L, Sol N, Lagerweij T, Wedekind L, Niers JM, Barazas M, Nilsson RJA, Geerts D, De Witt Hamer PC, Hagemann C, Vandertop WP, Van Tellingen O, Noske DP, Gray NS, Würdinger T. Effects of the selective MPS1 inhibitor MPS1-IN-3 on glioblastoma sensitivity to antimitotic drugs. J Natl Cancer Inst 2013; 105:1322-31. [PMID: 23940287 DOI: 10.1093/jnci/djt168] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Glioblastomas exhibit a high level of chemotherapeutic resistance, including to the antimitotic agents vincristine and taxol. During the mitotic agent-induced arrest, glioblastoma cells are able to perform damage-control and self-repair to continue proliferation. Monopolar spindle 1 (MPS1/TTK) is a checkpoint kinase and a gatekeeper of the mitotic arrest. METHODS We used glioblastoma cells to determine the expression of MPS1 and to determine the effects of MPS1 inhibition on mitotic errors and cell viability in combination with vincristine and taxol. The effect of MPS1 inhibition was assessed in different orthotopic glioblastoma mouse models (n = 3-7 mice/group). MPS1 expression levels were examined in relation to patient survival. RESULTS Using publicly available gene expression data, we determined that MPS1 overexpression corresponds positively with tumor grade and negatively with patient survival (two-sided t test, P < .001). Patients with high MPS1 expression (n = 203) had a median and mean survival of 487 and 913 days (95% confidence intervals [CI] = 751 to 1075), respectively, and a 2-year survival rate of 35%, whereas patients with intermediate MPS1 expression (n = 140) had a median and mean survival of 858 and 1183 days (95% CI = 1177 to 1189), respectively, and a 2-year survival rate of 56%. We demonstrate that MPS1 inhibition by RNAi results in sensitization to antimitotic agents. We developed a selective small-molecule inhibitor of MPS1, MPS1-IN-3, which caused mitotic aberrancies in glioblastoma cells and, in combination with vincristine, induced mitotic checkpoint override, increased aneuploidy, and augmented cell death. MPS1-IN-3 sensitizes glioblastoma cells to vincristine in orthotopic mouse models (two-sided log-rank test, P < .01), resulting in prolonged survival without toxicity. CONCLUSIONS Our results collectively demonstrate that MPS1, a putative therapeutic target in glioblastoma, can be selectively inhibited by MPS1-IN-3 sensitizing glioblastoma cells to antimitotic drugs.
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Affiliation(s)
- Bakhos A Tannous
- Neuroscience Center and Molecular Neurogenetics Unit, Departments of Neurology, Harvard Medical School, Boston, MA, USA
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13
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Efficacy of concomitant and adjuvant temozolomide in glioblastoma treatment. A multicentre randomized study. Neurol Neurochir Pol 2013; 47:101-8. [PMID: 23649997 DOI: 10.5114/ninp.2013.34398] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND AND PURPOSE The common treatment in patients with newly diagnosed glioblastoma multiforme is the ultimately radical surgical removal of the tumour combined with radiotherapy. This study compared safety and efficacy of radiotherapy alone with radiotherapy combined with temozolomide (TMZ) given before, during, and after radiotherapy. MATERIAL AND METHODS The patients operated on for glioblastoma multiforme during the first 21 postoperative days were randomly assigned to the group treated with radiotherapy alone (involved-field radiotherapy in 2 Gy fractions daily five times a week up to the total of 60 Gy over 6 weeks of treatment) or to the group treated with radiotherapy and TMZ, initially in the dose of 200 mg/m² during 5 postoperative days and after 23 days followed by 75 mg/m2 of body surface area daily, 7 days a week (from the first to the last day of radiotherapy). On completion of radiotherapy, five complementary courses of TMZ were introduced (150-200 mg/m² for 5 days, repeated every 28 days). The primary outcome measure was overall survival. RESULTS Fifty-eight patients from 3 centres were included in the study. The mean age of patients was 55 years and all the patients underwent a surgical procedure of glioblastoma removal. The mean overall survival in the group treated with TMZ was 16.0 months, whereas in the group with radiotherapy alone the overall survival reached 12.5 months. 24-month survival reached 23% in patients treated with TMZ and 6.7% in those who received radiotherapy only. Haematological complications of third or fourth degree were present in 10% of patients treated with radiotherapy and TMZ. CONCLUSIONS The introduction of TMZ before, during and after radiotherapy for newly diagnosed glioblastoma multiforme gives clinically and statistically significant improvement of survival with unremarkably increased toxicity of the treatment.
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14
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Côté J, Bovenzi V, Savard M, Dubuc C, Fortier A, Neugebauer W, Tremblay L, Müller-Esterl W, Tsanaclis AM, Lepage M, Fortin D, Gobeil F. Induction of selective blood-tumor barrier permeability and macromolecular transport by a biostable kinin B1 receptor agonist in a glioma rat model. PLoS One 2012; 7:e37485. [PMID: 22629405 PMCID: PMC3357387 DOI: 10.1371/journal.pone.0037485] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Accepted: 04/24/2012] [Indexed: 12/24/2022] Open
Abstract
Treatment of malignant glioma with chemotherapy is limited mostly because of delivery impediment related to the blood-brain tumor barrier (BTB). B1 receptors (B1R), inducible prototypical G-protein coupled receptors (GPCR) can regulate permeability of vessels including possibly that of brain tumors. Here, we determine the extent of BTB permeability induced by the natural and synthetic peptide B1R agonists, LysdesArg9BK (LDBK) and SarLys[dPhe8]desArg9BK (NG29), in syngeneic F98 glioma-implanted Fischer rats. Ten days after tumor inoculation, we detected the presence of B1R on tumor cells and associated vasculature. NG29 infusion increased brain distribution volume and uptake profiles of paramagnetic probes (Magnevist and Gadomer) at tumoral sites (T1-weighted imaging). These effects were blocked by B1R antagonist and non-selective cyclooxygenase inhibitors, but not by B2R antagonist and non-selective nitric oxide synthase inhibitors. Consistent with MRI data, systemic co-administration of NG29 improved brain tumor delivery of Carboplatin chemotherapy (ICP-Mass spectrometry). We also detected elevated B1R expression in clinical samples of high-grade glioma. Our results documented a novel GPCR-signaling mechanism for promoting transient BTB disruption, involving activation of B1R and ensuing production of COX metabolites. They also underlined the potential value of synthetic biostable B1R agonists as selective BTB modulators for local delivery of different sized-therapeutics at (peri)tumoral sites.
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Affiliation(s)
- Jérôme Côté
- Department of Pharmacology, University Hospital, Frankfurt, Germany
- Department of Nuclear Medicine and Radiobiology, University Hospital, Frankfurt, Germany
- Institute of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Veronica Bovenzi
- Department of Pharmacology, University Hospital, Frankfurt, Germany
- Institute of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Martin Savard
- Department of Pharmacology, University Hospital, Frankfurt, Germany
- Institute of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Céléna Dubuc
- Department of Pharmacology, University Hospital, Frankfurt, Germany
- Institute of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Audrey Fortier
- Department of Pharmacology, University Hospital, Frankfurt, Germany
| | | | - Luc Tremblay
- Department of Nuclear Medicine and Radiobiology, University Hospital, Frankfurt, Germany
| | | | - Ana-Maria Tsanaclis
- Department of Pathology, Centre Hospitalier Universitaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Martin Lepage
- Department of Nuclear Medicine and Radiobiology, University Hospital, Frankfurt, Germany
- Institute of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - David Fortin
- Department of Surgery, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- Institute of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Fernand Gobeil
- Department of Pharmacology, University Hospital, Frankfurt, Germany
- Institute of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- * E-mail:
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15
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Abstract
Gliobastoma multiform (GBM) is the most common and aggressive brain tumor, which is characterized by its infiltrative nature. Current standard therapy for GBMs consists of surgery followed by radiotherapy combined with the alkylating agent temozolomide (TMZ). Recent clinical trials have demonstrated that this chemo-irradiation approach results in a significant increase in survival compared to radiotherapy alone. Nevertheless, due to tumor recurrence, the median survival time is still limited to approximately 15 months. Recently, several studies have focused on aberrant signal transduction in GBM, resistance mechanisms of GBM to TMZ and to radiotherapy. Attention has been focused on molecular targets including phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway, protein kinase C (pKC) pathway, Ras/mitogen-activated protein kinase pathway (MAPK), Wnt pathway and intrinsic or extrinsic apoptosis pathways. In addition, research has been directed to radiotherapy and radiosensitizing agents, and cancer gene therapy as well. This article will address several resistance mechanisms of GBM to chemotherapy and radiotherapy and the recent preclinical and clinical studies on targeted therapy.
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Affiliation(s)
- N H Rekers
- Department of Medical Oncology, VU University Medical Center, The Netherlands
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16
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Prediction of glioblastoma multiform response to bevacizumab treatment using multi-parametric MRI. PLoS One 2012; 7:e29945. [PMID: 22253835 PMCID: PMC3256204 DOI: 10.1371/journal.pone.0029945] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 12/08/2011] [Indexed: 11/26/2022] Open
Abstract
Glioblastoma multiform (GBM) is a highly malignant brain tumor. Bevacizumab is a recent therapy for stopping tumor growth and even shrinking tumor through inhibition of vascular development (angiogenesis). This paper presents a non-invasive approach based on image analysis of multi-parametric magnetic resonance images (MRI) to predict response of GBM to this treatment. The resulting prediction system has potential to be used by physicians to optimize treatment plans of the GBM patients. The proposed method applies signal decomposition and histogram analysis methods to extract statistical features from Gd-enhanced regions of tumor that quantify its microstructural characteristics. MRI studies of 12 patients at multiple time points before and up to four months after treatment are used in this work. Changes in the Gd-enhancement as well as necrosis and edema after treatment are used to evaluate the response. Leave-one-out cross validation method is applied to evaluate prediction quality of the models. Predictive models developed in this work have large regression coefficients (maximum R2 = 0.95) indicating their capability to predict response to therapy.
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17
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Rieken S, Mohr A, Habermehl D, Welzel T, Lindel K, Witt O, Kulozik AE, Wick W, Debus J, Combs SE. Outcome and Prognostic Factors of Radiation Therapy for Medulloblastoma. Int J Radiat Oncol Biol Phys 2011; 81:e7-e13. [DOI: 10.1016/j.ijrobp.2010.12.042] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 12/08/2010] [Accepted: 12/27/2010] [Indexed: 11/30/2022]
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18
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Nieder C, Mehta MP. Advances in translational research provide a rationale for clinical re-evaluation of high-dose radiotherapy for glioblastoma. Med Hypotheses 2011; 76:410-3. [DOI: 10.1016/j.mehy.2010.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Revised: 11/04/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
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19
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Murray L, Bridgewater C, Levy D. Carboplatin Chemotherapy in Patients with Recurrent High-grade Glioma. Clin Oncol (R Coll Radiol) 2011; 23:55-61. [DOI: 10.1016/j.clon.2010.09.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 08/13/2010] [Accepted: 08/16/2010] [Indexed: 10/18/2022]
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20
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Raizer J. Issues in developing drugs for primary brain tumors: barriers and toxicities. Toxicol Pathol 2010; 39:152-7. [PMID: 21147933 DOI: 10.1177/0192623310391482] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Drug development in neuro-oncology remains a challenge for neoplasms of the central nervous system (CNS). Drugs can be administered peripherally (i.e., oral or intravenous) or locally (into the tumor or the adjacent neuropil). Each of these routes has advantages and disadvantages. Like the treatment for non-CNS cancers, peripheral side effects are encountered (i.e., diarrhea, myelosuppression, rash); however, there also may be neural-specific side effects for patients that may be acute or delayed (i.e., seizures, somnolence, hearing loss). The nervous system is also a privileged site protected by the blood-brain barrier, so many agents developed for peripheral administration will not penetrate into the CNS due to issues of size, charge, or lack of lipid solubility. In addition, the abnormal vasculature, increased interstitial pressure, and inherent mechanisms of tumor resistance (methyl-guanine-methyl transferase [MGMT], P-glycoprotein, etc.) within brain neoplasms reduce the efficacy of many agents designed for neuro-oncologic indications. Each of these issues alone, and all of them in aggregate, are reasons for the limited success of therapeutic agents directed against CNS tumors despite promising data acquired using cell lines and animal models.
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Affiliation(s)
- Jeffrey Raizer
- Northwestern University-Neurology, Chicago, IL 60611, USA.
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21
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Guan H, Zhang H, Cai J, Wu J, Yuan J, Li J, Huang Z, Li M. IKBKE is over-expressed in glioma and contributes to resistance of glioma cells to apoptosis via activating NF-κB. J Pathol 2010; 223:436-45. [PMID: 21171089 DOI: 10.1002/path.2815] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2010] [Revised: 08/28/2010] [Accepted: 10/13/2010] [Indexed: 12/19/2022]
Abstract
IκB kinase-ε (IKBKE), a member of the IκB kinase (IKK) family, has been identified as an oncogenic protein and found to be up-regulated in breast cancer, ovarian cancer and prostate cancer. Nonetheless, the expression status and functional significance of IKBKE in human glioma remain unexplored. For the first time, we have demonstrated that mRNA and protein levels of IKBKE were robustly up-regulated in glioma cell lines and human primary glioma tissues. Immunohistochemistry analysis revealed that 53.5% (38/71) paraffin-embedded archived glioma specimens exhibited high levels of IKBKE expression. Intriguingly, there was no significant difference in IKBKE expression among different grades of glioma. To understand the biological function of IKBKE in the development and progression of human glioma, glioma cells lines ectopically over-expressing IKBKE were established and tested for their responsiveness to apoptotic inducers. Our data showed that IKBKE over-expression inhibited cell apoptosis induced by UV irradiation or adriamycin and, in contrast, shRNAi-mediated suppression of IKBKE increased the sensitivity of glioma cells to the apoptotic inducers. Importantly, we found that up-regulated IKBKE could induce the expression of Bcl-2 through activating NF-κB signalling, and that, specifically, we identified IκB as a critical component for this signalling cascade. The current study suggests that up-regulation of IKBKE may represent an important molecular hallmark that is biologically and clinically relevant to the development and progression, as well as the chemo- and radio-resistance, of the disease.
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Affiliation(s)
- Hongyu Guan
- Key Laboratory of Tropical Disease Control, Sun Yat-sen University, Ministry of Education, Guangzhou, Guangdong 510080, People's Republic of China
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22
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The transglutaminase 2 gene is aberrantly hypermethylated in glioma. J Neurooncol 2010; 101:429-40. [PMID: 20596752 DOI: 10.1007/s11060-010-0277-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Accepted: 06/16/2010] [Indexed: 12/26/2022]
Abstract
Transglutaminase 2 (TG2) is a ubiquitously expressed protein that catalyzes protein/protein crosslinking. Because extracellular TG2 crosslinks components of the extracellular matrix, TG2 is thought to function as a suppressor of cellular invasion. We have recently uncovered that the TG2 gene (TGM2) is a target for epigenetic silencing in breast cancer, highlighting a molecular mechanism that drives reduced TG2 expression, and this aberrant molecular event may contribute to invasiveness in this tumor type. Because tumor invasiveness is a primary determinant of brain tumor aggressiveness, we sought to determine if TGM2 is targeted for epigenetic silencing in glioma. Analysis of TGM2 gene methylation in a panel of cultured human glioma cells indicated that the 5' flanking region of the TGM2 gene is hypermethylated and that this feature is associated with reduced TG2 expression as judged by immunoblotting. Further, culturing glioma cells in the presence of the global DNA demethylating agent 5-aza-2'-deoxycytidine and the histone deacetylase inhibitor Trichostatin A resulted in re-expression of TG2 in these lines. In primary brain tumors we observed that the TGM2 promoter is commonly hypermethylated and that this feature is a cancer-associated phenomenon. Using publically available databases, TG2 expression in gliomas was found to vary widely, with many tumors showing overexpression or underexpression of this gene. Since overexpression of TG2 leads to resistance to doxorubicin through the ectopic activation of NFκB, we sought to examine the effects of recombinant TG2 expression in glioma cells treated with commonly used brain tumor therapeutics. We observed that in addition to doxorubicin, TG2 expression drove resistance to CCNU; however, TG2 expression did not alter sensitivity to other drugs tested. Finally, a catalytically null mutant of TG2 was also able to support doxorubicin resistance in glioma cells indicating that transglutaminase activity is not necessary for the resistance phenotype.
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Gridley DS, Grover RS, Loredo LN, Wroe AJ, Slater JD. Proton-beam therapy for tumors of the CNS. Expert Rev Neurother 2010; 10:319-30. [PMID: 20136386 DOI: 10.1586/ern.09.150] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The focus of this review is proton radiotherapy for primary neoplasms of the brain. Although glial cells are among the most radioresistant in the body, the presence of sensitive critical structures and the high doses needed to control CNS tumors present a formidable challenge to the treating radiation oncologist. Treatment with conventional photon radiation at doses required to control disease progression all too often results in unacceptable toxicity. Protons have intrinsic properties that often allow radiation oncologists to deliver a higher dose to the tumor compared with photons, while at the same time offering better sparing of normal tissues. Recognition of these advantages has resulted in development of many new proton treatment facilities worldwide.
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Affiliation(s)
- Daila S Gridley
- Department of Radiation Medicine, Chan Shun Pavilion, 11175 Campus Street, Loma Linda University, Loma Linda, CA 92354, USA.
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24
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Rossi A, Schenone S, Angelucci A, Cozzi M, Caracciolo V, Pentimalli F, Puca A, Pucci B, La Montagna R, Bologna M, Botta M, Giordano A. New pyrazolo-[3,4-d]-pyrimidine derivative Src kinase inhibitors lead to cell cycle arrest and tumor growth reduction of human medulloblastoma cells. FASEB J 2010; 24:2881-92. [PMID: 20354138 DOI: 10.1096/fj.09-148593] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Medulloblastoma is the most common malignant brain tumor in children, and despite improvements in the overall survival rate, it still lacks an effective treatment. Src plays an important role in cancer, and recently high Src activity was documented in medulloblastoma. In this report, we examined the effects of novel pyrazolo-[3,4-d]-pyrimidine derivative Src inhibitors in medulloblastoma. By MTS assay, we showed that the pyrimidine derivatives indicated as S7, S29, and SI163 greatly reduce the growth rate of medulloblastoma cells by inhibiting Src phosphorylation, compared with HT22 non-neoplastic nerve cells. These compounds also halt cells in the G(2)/M phase, and this effect likely occurs through the regulation of cdc2 and CDC25C phosphorylation, as shown by Western blot. Moreover, the exposure to pyrimidine derivatives induces apoptosis, assayed by the supravital propidium iodide assay, through modulation of the apoptotic proteins Bax and Bcl2, and inhibits tumor growth in vivo in a mouse model. Notably, S7, S29, and SI163 show major inhibitory effects on medulloblastoma cell growth compared with the chemotherapeutic agents cisplatin and etoposide. In conclusion, our results suggest that S7, S29, and SI163 could be novel attractive candidates for the treatment of medulloblastoma or tumors characterized by high Src activity.
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Affiliation(s)
- Alessandra Rossi
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, 1900 North 12th St., Philadelphia, PA 19122, USA
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25
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A mathematical model of brain tumour response to radiotherapy and chemotherapy considering radiobiological aspects. J Theor Biol 2010; 262:553-65. [DOI: 10.1016/j.jtbi.2009.10.021] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2009] [Revised: 10/09/2009] [Accepted: 10/10/2009] [Indexed: 11/19/2022]
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Abstract
PURPOSE OF REVIEW The current standard care of treatment for glioblastoma multiforme (GBM) is never curative and exclusively involves the use of cytoxics upfront (e.g., radiation and chemotherapy). Current clinical protocols involve the use of single-agent targeted therapies, which inhibit specific pathways. Given the functional redundancies present in human tumors and escape mechanisms, it is highly unlikely that such a monotherapy approach will be successful in the treatment of GBM. Future directions of therapy for GBMs will likely involve the use of therapeutic cocktails, including more than one target specific inhibitors based on tumor escape mechanism, genetic, epigenetic and molecular signatures. This review addresses some of the relevant issues. RECENT FINDINGS Correlative clinical studies from various clinical trials and preclinical studies have provided the meticulous use of chemotherapeutics and radiation based on molecular profiling of tumors. Alkylating agents such as temozolomide lose their efficacy if DNA repair enzyme expression is upregulated. The alternative strategies include targeting the enzyme or one can use poly (ADP) ribose inhibitor to inhibit base excision repair pathway rather than mismatch repair pathway. Currently, several inhibitors in this category are in clinical trials. Next, we have addressed new avenues including radiosensitizers, hypoxia, metabolism, angiogenesis, invasive and infiltrative nature of tumors and potential molecular targets, which can be exploited for clinical trials. Finally, we have included some aspect of genome-wide association studies and correlative analysis and the lessons learned to design better clinical trials. SUMMARY Advances in profiling the noncoding RNAs, genetic, epigenetic profiles, metabolomics, genomics and proteomics may uncover important resistance mechanisms in GBM. Personalized therapy using various therapeutic cocktails targeting these resistance mechanisms may prove even more effective in the future management of GBMs.
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Affiliation(s)
- Kamalakannan Palanichamy
- Department of Radiation Oncology, The Ohio State University Medical School, Columbus, Ohio 43210, USA
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