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Palubeckaitė I, Venneker S, van den Akker BEWM, Briaire-de Bruijn IH, Boveé JVMG. Does PARP Inhibition Sensitize Chondrosarcoma Cell Lines to Chemotherapy or Radiotherapy? Results From a Three-dimensional Spheroid Cell Model. Clin Orthop Relat Res 2023; 481:608-619. [PMID: 36729612 PMCID: PMC9928768 DOI: 10.1097/corr.0000000000002483] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 10/17/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND Chondrosarcomas are well known for their resistance to conventional chemotherapy and radiotherapy treatment regimens, which is particularly detrimental in patients who have unresectable tumors. Recently, inhibition of poly(ADP-ribose) polymerase (PARP) by talazoparib was shown to sensitize chondrosarcoma cell lines to chemotherapy (temozolomide) or radiotherapy, irrespective of isocitrate dehydrogenase (IDH) mutation status. Because two-dimensionally grown cell lines have limitations and may not accurately represent the clinical response to drug treatment, we aimed to use a more representative three-dimensional alginate spheroid chondrosarcoma model. It is important to test therapeutic agents in vitro before testing them in animals or humans; therefore, we aimed to determine the effectiveness of a PARP inhibitor in reducing the viability of chondrosarcoma spheroids. Using a more stringent, complex in vitro model refines future therapeutic options for further investigation in animal models, increasing efficiency, reducing unnecessary animal use, and saving time and cost. QUESTIONS/PURPOSES (1) Does talazoparib treatment slow or inhibit the growth of chondrosarcoma spheroids, and does an increased treatment duration change the drug's effect? (2) Does talazoparib work in synergy with temozolomide treatment to reduce the viability of chondrosarcoma spheroids? (3) Does talazoparib work in synergy with radiotherapy treatment to reduce the viability of chondrosarcoma spheroids? METHODS Three representative conventional chondrosarcoma cell lines (CH2879 [IDH wildtype], JJ012 [IDH1 mutant], and SW1353 [IDH2 mutant]) were cultured as alginate spheroids and treated with talazoparib (0.001 to 10 µM), temozolomide (0.01 to 100 µM), or combinations of these drugs for 3, 7, and 14 days, representing different stages of spheroid growth. The cell lines were selected to represent a variety of IDH mutation statuses and were previously validated in spheroid culturing. Temozolomide was chosen because of its previous success when combined with PARP inhibitors, dissimilar to other commonly used chemotherapies. The effect on spheroid viability was assessed using three cell viability assays. Additionally, spheroid count, morphology, proliferation, and apoptosis were assessed. The effect of talazoparib (5 to 10 nM) combined with ƴ-radiation applied using a 137 C source (0 to 6 Gy) was assessed as surviving fractions by counting the number of spheroids (three). The therapeutic synergy of low-concentration talazoparib (5 to 10 nM) with temozolomide or radiotherapy was determined by calculating Excess over Bliss scores. RESULTS Talazoparib treatment reduced the spheroid viability of all three cell lines after 14 days (IC 50 ± SD of CH2879: 0.1 ± 0.03 µM, fold change: 220; JJ012: 12 ± 1.4 µM, fold change: 4.8; and SW1353: 1.0 ± 0.2 µM, fold change: 154), compared with 3-day treatments of mature spheroids. After 14 days of treatment, the Excess over Bliss scores for 100 µM temozolomide and talazoparib indicated synergistic efficacy (Excess over Bliss scores: CH2879 59% [lower 95% CI 52%], JJ012 18% [lower 95% CI 8%], and SW1353 55% [lower 95% CI 25%]) of this combination treatment. A stable synergistic effect of talazoparib and radiotherapy was present only in JJ012 spheroids at a 4Gƴ radiation dose (Excess over Bliss score: 22% [lower 95% CI 6%]). CONCLUSION In our study, long-term PARP inhibition was more effective than short-term treatment, and only one of the three chondrosarcoma spheroid lines was sensitive to combined PARP inhibition and radiotherapy. These findings suggest subsequent animal studies should focus on long-term PARP inhibition, and temozolomide combined with talazoparib has a higher chance of success than combination with radiotherapy. CLINICAL RELEVANCE Combination treatment of talazoparib and temozolomide was effective in reducing the viability of chondrosarcoma spheroids and spheroid growth, regardless of IDH mutation status, providing rationale to replicate this treatment combination in an animal chondrosarcoma model.
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Affiliation(s)
- Ieva Palubeckaitė
- Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands
| | - Sanne Venneker
- Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands
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Palubeckaitė I, Venneker S, Briaire-de Bruijn IH, van den Akker BE, Krol AD, Gelderblom H, Bovée JVMG. Selection of Effective Therapies Using Three-Dimensional in vitro Modeling of Chondrosarcoma. Front Mol Biosci 2020; 7:566291. [PMID: 33425984 PMCID: PMC7793672 DOI: 10.3389/fmolb.2020.566291] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 11/30/2020] [Indexed: 01/04/2023] Open
Abstract
Purpose: Chondrosarcomas are a group of cartilaginous malignant neoplasms characterized by the deposition of chondrogenic extracellular matrix. Surgical resection is currently the only curative treatment option, due to their high resistance to conventional chemotherapy and radiotherapy. Novel therapeutic treatment options may improve outcome. Predominantly used cell line monolayer in vitro models lack in vivo complexity, such as the presence of extracellular matrix, and differing oxygen access. Hence, we aimed to improve pre-clinical chondrosarcoma research by developing an alginate-based 3D cell culture model. Method: An alginate scaffold was applied to generate spheroids of three chondrosarcoma cell lines (CH2879, JJ012, SW1353). Morphological, histological and immunohistochemical assessment of the spheroids were used to characterize the chondrosarcoma model. Presto blue assay, morphological and immunohistochemical assessment were applied to assess spheroid response to a panel of chemotherapeutics and targeted therapies, which was compared to conventional 2D monolayer models. Synergistic effect of doxorubicin and ABT-737 (Bcl-2 inhibitor) was compared between monolayer and spheroid models using excess over Bliss. A 3D colony formation assay was developed for assessment of radiotherapy response. Results: Chondrosarcoma spheroids produced chondrogenic matrix and remained proliferative after 2 weeks of culture. When treated with chemotherapeutics, the spheroids were more resistant than their monolayer counterparts, in line with animal models and clinical data. Moreover, for sapanisertib (mTOR inhibitor) treatment, a recovery in chondrosarcoma growth, previously observed in mice models, was also observed using long-term treatment. Morphological assessment was useful in the case of YM-155 (survivin inhibitor) treatment where a fraction of the spheroids underwent cell death, however a large fraction remained proliferative and unaffected. Synergy was less pronounced in 3D compared to 2D. A 3D clonogenic assay confirmed increased resistance to radiotherapy in 3D chondrosarcoma spheroids. Conclusion: We demonstrate that the chondrosarcoma alginate spheroid model is more representative of chondrosarcoma in vivo and should be used instead of the monolayer model for therapy testing. Improved selection at in vitro stage of therapeutic testing will increase the amount of information available for experimental design of in vivo animal testing and later, clinical stages. This can potentially lead to increased likelihood of approval and success at clinical trials.
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Affiliation(s)
- Ieva Palubeckaitė
- Department of Pathology, Leiden University Medical Center, Leiden, Netherlands
| | - Sanne Venneker
- Department of Pathology, Leiden University Medical Center, Leiden, Netherlands
| | | | | | - Augustinus D Krol
- Department of Radiation Oncology, Leiden University Medical Center, Leiden, Netherlands
| | - Hans Gelderblom
- Department of Medical Oncology, Leiden University Medical Center, Leiden, Netherlands
| | - Judith V M G Bovée
- Department of Pathology, Leiden University Medical Center, Leiden, Netherlands
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Venneker S, Kruisselbrink AB, Baranski Z, Palubeckaite I, Briaire-de Bruijn IH, Oosting J, French PJ, Danen EHJ, Bovée JVMG. Beyond the Influence of IDH Mutations: Exploring Epigenetic Vulnerabilities in Chondrosarcoma. Cancers (Basel) 2020; 12:E3589. [PMID: 33266275 PMCID: PMC7760027 DOI: 10.3390/cancers12123589] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/12/2020] [Accepted: 11/26/2020] [Indexed: 12/16/2022] Open
Abstract
Mutations in the isocitrate dehydrogenase (IDH1 or IDH2) genes are common in enchondromas and chondrosarcomas, and lead to elevated levels of the oncometabolite D-2-hydroxyglutarate causing widespread changes in the epigenetic landscape of these tumors. With the use of a DNA methylation array, we explored whether the methylome is altered upon progression from IDH mutant enchondroma towards high-grade chondrosarcoma. High-grade tumors show an overall increase in the number of highly methylated genes, indicating that remodeling of the methylome is associated with tumor progression. Therefore, an epigenetics compound screen was performed in five chondrosarcoma cell lines to therapeutically explore these underlying epigenetic vulnerabilities. Chondrosarcomas demonstrated high sensitivity to histone deacetylase (HDAC) inhibition in both 2D and 3D in vitro models, independent of the IDH mutation status or the chondrosarcoma subtype. siRNA knockdown and RNA expression data showed that chondrosarcomas rely on the expression of multiple HDACs, especially class I subtypes. Furthermore, class I HDAC inhibition sensitized chondrosarcoma to glutaminolysis and Bcl-2 family member inhibitors, suggesting that HDACs define the metabolic state and apoptotic threshold in chondrosarcoma. Taken together, HDAC inhibition may represent a promising targeted therapeutic strategy for chondrosarcoma patients, either as monotherapy or as part of combination treatment regimens.
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Affiliation(s)
- Sanne Venneker
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.V.); (A.B.K.); (I.P.); (I.H.B.-d.B.); (J.O.)
| | - Alwine B. Kruisselbrink
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.V.); (A.B.K.); (I.P.); (I.H.B.-d.B.); (J.O.)
| | - Zuzanna Baranski
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, 2333 CC Leiden, The Netherlands; (Z.B.); (E.H.J.D.)
| | - Ieva Palubeckaite
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.V.); (A.B.K.); (I.P.); (I.H.B.-d.B.); (J.O.)
| | - Inge H. Briaire-de Bruijn
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.V.); (A.B.K.); (I.P.); (I.H.B.-d.B.); (J.O.)
| | - Jan Oosting
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.V.); (A.B.K.); (I.P.); (I.H.B.-d.B.); (J.O.)
| | - Pim J. French
- Department of Neurology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
| | - Erik H. J. Danen
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, 2333 CC Leiden, The Netherlands; (Z.B.); (E.H.J.D.)
| | - Judith V. M. G. Bovée
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.V.); (A.B.K.); (I.P.); (I.H.B.-d.B.); (J.O.)
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A system-level approach identifies HIF-2α as a critical regulator of chondrosarcoma progression. Nat Commun 2020; 11:5023. [PMID: 33024108 PMCID: PMC7538956 DOI: 10.1038/s41467-020-18817-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 09/11/2020] [Indexed: 12/18/2022] Open
Abstract
Chondrosarcomas, malignant cartilaginous neoplasms, are capable of transitioning to highly aggressive, metastatic, and treatment-refractory states, resulting in significant patient mortality. Here, we aim to uncover the transcriptional program directing such tumor progression in chondrosarcomas. We conduct weighted correlation network analysis to extract a characteristic gene module underlying chondrosarcoma malignancy. Hypoxia-inducible factor-2α (HIF-2α, encoded by EPAS1) is identified as an upstream regulator that governs the malignancy gene module. HIF-2α is upregulated in high-grade chondrosarcoma biopsies and EPAS1 gene amplification is associated with poor prognosis in chondrosarcoma patients. Using tumor xenograft mouse models, we demonstrate that HIF-2α confers chondrosarcomas the capacities required for tumor growth, local invasion, and metastasis. Meanwhile, pharmacological inhibition of HIF-2α, in conjunction with the chemotherapy agents, synergistically enhances chondrosarcoma cell apoptosis and abolishes malignant signatures of chondrosarcoma in mice. We expect that our insights into the pathogenesis of chondrosarcoma will provide guidelines for the development of molecular targeted therapeutics for chondrosarcoma. Chondrosarcomas are frequently aggressive, understanding the transcriptional changes associated with progression may help in developing new treatments. Here, the authors show that HIF-2α is increased in expression on progression and pharmacological inhibition of the protein together with chemotherapy is a useful strategy for controlling tumour growth in mice.
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Ouyang Z, Wang S, Zeng M, Li Z, Zhang Q, Wang W, Liu T. Therapeutic effect of palbociclib in chondrosarcoma: implication of cyclin-dependent kinase 4 as a potential target. Cell Commun Signal 2019; 17:17. [PMID: 30808351 PMCID: PMC6390580 DOI: 10.1186/s12964-019-0327-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 02/12/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Chondrosarcoma is a malignant cartilaginous neoplasm of the bone which resistant to radiation therapy and chemotherapy. Cyclin-dependent kinase 4 (CKD4) is highly expressed in human cancer, and palbociclib, the inhibitor of CDK4 has been used clinically under FDA approval for application in cancer therapeutic remedies. However, the level of CDK4 and the treatment possibility in chondrosarcoma require further exploration. Thus, we aim to investigate the level of CDK4 and accompanying therapeutic effects of palbociclib in chondrosarcoma. METHODS We used immunohistochemistric analysis to evaluate human CDK4 productions in chondrosarcoma tissues. The inhibitory expression of CDK4 by siRNA or palbociclib on cell proliferation, invasion, migration, apoptosis and cycle arrest of chondrosarcoma were determined by MTT, wound healing, transwell and flow cytometry. CDK4/Rb signaling pathway were determined by western blot and Immunofluorescence assay. The inhibition effect of palbociclib on tumor growth within the bone were determined by bioluminescence imaging in vivo. RESULTS CDK4 was found to express significantly in human chondrosarcoma samples. The enhanced levels of CDK4 were interlinked with malignant metastasis and undesirable prognosis of chondrosarcoma patients. CDK4 was also highly expressed in human chondrosarcoma cell lines and its inhibition by specific siRNA and palbociclib lead to a decrease in cell proliferation, accompanied by the phosphorylation of Rb. Furthermore, palbociclib also induced cell cycle arrest in G1 phase and decreased cell migration and invasion via CDK4/Rb signaling pathway. Administration of palbociclib in vivo could reduce tumor burden in chondrosarcoma. CONCLUSIONS In summary, these data highlight CDK4 inhibitors, such as palbociclib, as potential promising therapeutics in the treatment of human chondrosarcoma.
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Affiliation(s)
- Zhengxiao Ouyang
- 0000 0001 0379 7164grid.216417.7Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Sisi Wang
- 0000 0001 0379 7164grid.216417.7Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Ming Zeng
- 0000 0001 0379 7164grid.216417.7Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Zhihong Li
- 0000 0001 0379 7164grid.216417.7Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Qing Zhang
- 0000 0001 0379 7164grid.216417.7Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Wanchun Wang
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
| | - Tang Liu
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
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Addie RD, de Jong Y, Alberti G, Kruisselbrink AB, Que I, Baelde H, Bovée JVMG. Exploration of the chondrosarcoma metabolome; the mTOR pathway as an important pro-survival pathway. J Bone Oncol 2019; 15:100222. [PMID: 30766792 PMCID: PMC6360255 DOI: 10.1016/j.jbo.2019.100222] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 01/27/2019] [Accepted: 01/28/2019] [Indexed: 12/18/2022] Open
Abstract
Background Chondrosarcomas are malignant cartilage-producing tumors showing mutations and changes in gene expression in metabolism related genes. In this study, we aimed to explore the metabolome and identify targetable metabolic vulnerabilities in chondrosarcoma. Methods A custom-designed metabolic compound screen containing 39 compounds targeting different metabolic pathways was performed in chondrosarcoma cell lines JJ012, SW1353 and CH2879. Based on the anti-proliferative activity, six compounds were selected for validation using real-time metabolic profiling. Two selected compounds (rapamycin and sapanisertib) were further explored for their effect on viability, apoptosis and metabolic dependency, in normoxia and hypoxia. In vivo efficacy of sapanisertib was tested in a chondrosarcoma orthotopic xenograft mouse model. Results Inhibitors of glutamine, glutathione, NAD synthesis and mTOR were effective in chondrosarcoma cells. Of the six compounds that were validated on the metabolic level, mTOR inhibitors rapamycin and sapanisertib showed the most consistent decrease in oxidative and glycolytic parameters. Chondrosarcoma cells were sensitive to mTORC1 inhibition using rapamycin. Inhibition of mTORC1 and mTORC2 using sapanisertib resulted in a dose-dependent decrease in viability in all chondrosarcoma cell lines. In addition, induction of apoptosis was observed in CH2879 after 24 h. Treatment of chondrosarcoma xenografts with sapanisertib slowed down tumor growth compared to control mice. Conclusions mTOR inhibition leads to a reduction of oxidative and glycolytic metabolism and decreased proliferation in chondrosarcoma cell lines. Although further research is needed, these findings suggest that mTOR inhibition might be a potential therapeutic option for patients with chondrosarcoma.
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Key Words
- ACT, Atypical cartilaginous tumor
- BLI, Bioluminescence imaging
- BSA, Bovine serum albumin
- BSO, Buthionine sulfoximine
- Chondrosarcoma
- D2HG, d-2-Hydroxyglutarate
- DMSO, Dimethyl sulfoxide
- ECAR, Extracellular acidification rate
- FBS, Fetal bovine serum
- FCCP, Carbonyl cyanide-4-(trifluoromethoxy)phenylhydrazone
- FLI, Fluorescence imaging
- HIF, Hypoxia-inducible factor
- IDH, Isocitrate dehydrogenase
- Metabolism
- OCR, Oxygen consumption rate
- ROS, Reactive oxygen species
- Rapamycin
- mCT, Micro computed tomography
- mTOR, Mammalian target of rapamycin
- mTOR, Sapanisertib
- α-KG, α-ketoglutarate
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Affiliation(s)
- Ruben D Addie
- Department of Pathology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Yvonne de Jong
- Department of Pathology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Gaia Alberti
- Department of Pathology, Leiden University Medical Centre, Leiden, the Netherlands
| | | | - Ivo Que
- Department of Radiology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Hans Baelde
- Department of Pathology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Judith V M G Bovée
- Department of Pathology, Leiden University Medical Centre, Leiden, the Netherlands
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Brown HK, Schiavone K, Gouin F, Heymann MF, Heymann D. Biology of Bone Sarcomas and New Therapeutic Developments. Calcif Tissue Int 2018; 102:174-195. [PMID: 29238848 PMCID: PMC5805807 DOI: 10.1007/s00223-017-0372-2] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 11/29/2017] [Indexed: 02/06/2023]
Abstract
Bone sarcomas are tumours belonging to the family of mesenchymal tumours and constitute a highly heterogeneous tumour group. The three main bone sarcomas are osteosarcoma, Ewing sarcoma and chondrosarcoma each subdivided in diverse histological entities. They are clinically characterised by a relatively high morbidity and mortality, especially in children and adolescents. Although these tumours are histologically, molecularly and genetically heterogeneous, they share a common involvement of the local microenvironment in their pathogenesis. This review gives a brief overview of their specificities and summarises the main therapeutic advances in the field of bone sarcoma.
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Affiliation(s)
- Hannah K Brown
- Department of Oncology and Metabolism, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK
- European Associated Laboratory, "Sarcoma Research Unit", INSERM, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK
| | - Kristina Schiavone
- Department of Oncology and Metabolism, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK
- European Associated Laboratory, "Sarcoma Research Unit", INSERM, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK
| | - François Gouin
- European Associated Laboratory, "Sarcoma Research Unit", Faculty of Medicine, INSERM, UMR1238, INSERM, Nantes, France
- Faculty of Medicine, University of Nantes, 44035, Nantes, France
| | - Marie-Françoise Heymann
- Department of Oncology and Metabolism, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK
- Institut de Cancérologie de l'Ouest, site René Gauducheau, INSERM, UMR 1232, 44805, Saint-Herblain, France
- European Associated Laboratory, "Sarcoma Research Unit", INSERM, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK
| | - Dominique Heymann
- Department of Oncology and Metabolism, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK.
- Faculty of Medicine, University of Nantes, 44035, Nantes, France.
- Institut de Cancérologie de l'Ouest, site René Gauducheau, INSERM, UMR 1232, 44805, Saint-Herblain, France.
- European Associated Laboratory, "Sarcoma Research Unit", INSERM, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK.
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Xu W, Wan Q, Na S, Yokota H, Yan JL, Hamamura K. Suppressed invasive and migratory behaviors of SW1353 chondrosarcoma cells through the regulation of Src, Rac1 GTPase, and MMP13. Cell Signal 2015; 27:2332-42. [PMID: 26303573 DOI: 10.1016/j.cellsig.2015.08.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/18/2015] [Accepted: 08/20/2015] [Indexed: 10/23/2022]
Abstract
Chondrosarcoma is the second frequent type of primary bone cancer. In response to stress to the endoplasmic reticulum, activation of eIF2α-mediated signaling is reported to induce apoptosis. However, its effects on invasive and migratory behaviors of chondrosarcoma have not been understood. Focusing on potential roles of Src kinase, Rac1 GTPase, and MMP13, we investigated eIF2α-driven regulation of SW1353 chondrosarcoma cells. In particular, we employed two chemical agents (salubrinal, Sal; and guanabenz, Gu) that elevate the level of eIF2α phosphorylation. The result revealed that both Sal and Gu reduced invasion and motility of SW1353 chondrosarcoma cells in a dose dependent manner. Live imaging using a fluorescent resonance energy transfer (FRET) technique showed that Sal and Gu downregulated activities of Src kinase as well as Rac1 GTPase in an eIF2α dependent manner. RNA interference experiments supported an eIF2α-mediated regulatory network in the inhibitory role of Sal and Gu. Partial silencing of MMP13 also suppressed malignant phenotypes of SW1353 chondrosarcoma cells. However, MMP13 was not regulated via eIF2α since administration of Sal but not Gu reduced expression of MMP13. In summary, we demonstrate that eIF2α dependent and independent pathways regulate invasion and motility of SW1353 chondrosarcoma cells, and inactivation of Src, Rac1, and MMP13 by Sal could provide a potential adjuvant therapy for combating metastatic chondrosarcoma cells.
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Affiliation(s)
- Wenxiao Xu
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, USA; Department of Orthopedics, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Qiaoqiao Wan
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Sungsoo Na
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Hiroki Yokota
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, USA; Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202 USA
| | - Jing-Long Yan
- Department of Orthopedics, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150086, China.
| | - Kazunori Hamamura
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, USA; Department of Pharmacology, School of Dentistry, Aichi-Gakuin University, Nagoya 464-8650, Japan.
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In vitro engineering of human 3D chondrosarcoma: a preclinical model relevant for investigations of radiation quality impact. BMC Cancer 2015; 15:579. [PMID: 26253487 PMCID: PMC4529727 DOI: 10.1186/s12885-015-1590-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 07/31/2015] [Indexed: 12/22/2022] Open
Abstract
Background The benefit of better ballistic and higher efficiency of carbon ions for cancer treatment (hadron-therapy) is asserted since decades, especially for unresectable or resistant tumors like sarcomas. However, hadron-therapy with carbon ions stays underused and raises some concerns about potential side effects for patients. Chondrosarcoma is a cartilaginous tumor, chemo- and radiation-resistant, that lacks reference models for basic and pre-clinical studies in radiation-biology. Most studies about cellular effects of ionizing radiation, including hadrons, were performed under growth conditions dramatically different from human homeostasis. Tridimensional in vitro models are a fair alternative to animal models to approach tissue and tumors microenvironment. Methods By using a collagen matrix, standardized culture conditions, physiological oxygen tension and a well defined chondrosarcoma cell line, we developed a pertinent in vitro 3D model for hadron-biology studies. Low- and high-Linear Energy Transfer (LET) ionizing radiations from GANIL facilities of ~1 keV/μm and 103 ± 4 keV/μm were used respectively, at 2 Gy single dose. The impact of radiation quality on chondrosarcoma cells cultivated in 3D was analyzed on cell death, cell proliferation and DNA repair. Results A fair distribution of chondrosarcoma cells was observed in the whole 3D scaffold. Moreover, LET distribution in depth, for ions, was calculated and found acceptable for radiation-biology studies using this kind of scaffold. No difference in cell toxicity was observed between low- and high-LET radiations but a higher rate of proliferation was displayed following high-LET irradiation. Furthermore, 3D models presented a higher and longer induction of H2AX phosphorylation after 2 Gy of high-LET compared to low-LET radiations. Conclusions The presented results show the feasibility and usefulness of our 3D chondrosarcoma model in the study of the impact of radiation quality on cell fate. The observed changes in our tissue-like model after ionizing radiation exposure may explain some discrepancies between radiation-biology studies and clinical data. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1590-5) contains supplementary material, which is available to authorized users.
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In this issue. Virchows Arch 2015. [DOI: 10.1007/s00428-014-1708-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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