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Abstract
Informative and realistic mouse models of high-risk neuroblastoma are central to understanding mechanisms of tumour initiation, progression, and metastasis. They also play vital roles in validating tumour drivers and drug targets, as platforms for assessment of new therapies and in the generation of drug sensitivity data that can inform treatment decisions for individual patients. This review will describe genetically engineered mouse models of specific subsets of high-risk neuroblastoma, the development of patient-derived xenograft models that more broadly represent the diversity and heterogeneity of the disease, and models of primary and metastatic disease. We discuss the research applications, advantages, and limitations of each model type, the importance of model repositories and data standards for supporting reproducible, high-quality research, and potential future directions for neuroblastoma mouse models.
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Affiliation(s)
- Alvin Kamili
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW, Australia.,School of Women's and Children's Health, UNSW Sydney, Kensington, NSW, Australia
| | - Caroline Atkinson
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW, Australia.,School of Women's and Children's Health, UNSW Sydney, Kensington, NSW, Australia
| | - Toby N Trahair
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW, Australia.,School of Women's and Children's Health, UNSW Sydney, Kensington, NSW, Australia.,Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia
| | - Jamie I Fletcher
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW, Australia. .,School of Women's and Children's Health, UNSW Sydney, Kensington, NSW, Australia.
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Intermittent hypoxia effect on osteoclastogenesis stimulated by neuroblastoma cells. PLoS One 2014; 9:e105555. [PMID: 25148040 PMCID: PMC4141796 DOI: 10.1371/journal.pone.0105555] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 07/22/2014] [Indexed: 12/13/2022] Open
Abstract
Background Neuroblastoma is the most common extracranial pediatric solid tumor. Intermittent hypoxia, which is characterized by cyclic periods of hypoxia and reoxygenation, has been shown to positively modulate tumor development and thereby induce tumor growth, angiogenic processes, and metastasis. Bone is one of the target organs of metastasis in advanced neuroblastoma Neuroblastoma cells produce osteoclast-activating factors that increase bone resorption by the osteoclasts. The present study focuses on how intermittent hypoxia preconditioned SH-SY5Y neuroblastoma cells modulate osteoclastogenesis in RAW 264.7 cells compared with neuroblastoma cells grown at normoxic conditions. Methods We inhibited HIF-1α and HIF-2α in neuroblastoma SH-SY5Y cells by siRNA/shRNA approaches. Protein expression of HIF-1α, HIF-2α and MAPKs were investigated by western blotting. Expression of osteoclastogenic factors were determined by real-time RT-PCR. The influence of intermittent hypoxia and HIF-1α siRNA on migration of neuroblastoma cells and in vitro differentiation of RAW 264.7 cells were assessed. Intratibial injection was performed with SH-SY5Y stable luciferase-expressing cells and in vivo bioluminescence imaging was used in the analysis of tumor growth in bone. Results Upregulation of mRNAs of osteoclastogenic factors VEGF and RANKL was observed in intermittent hypoxia-exposed neuroblastoma cells. Conditioned medium from the intermittent hypoxia-exposed neuroblastoma cells was found to enhance osteoclastogenesis, up-regulate the mRNAs of osteoclast marker genes including TRAP, CaSR and cathepsin K and induce the activation of ERK, JNK, and p38 in RAW 264.7 cells. Intermittent hypoxia-exposed neuroblastoma cells showed an increased migratory pattern compared with the parental cells. A significant increase of tumor volume was found in animals that received the intermittent hypoxia-exposed cells intratibially compared with parental cells. Conclusions Intermittent hypoxic exposure enhanced capabilities of neuroblastoma cells in induction of osteoclast differentiation in RAW 264.7 cells. Increased migration and intratibial tumor growth was observed in intermittent hypoxia-exposed neuroblastoma cells compared with parental cells.
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Zhou J, Xiang Y, Yoshimura T, Chen K, Gong W, Huang J, Zhou Y, Yao X, Bian X, Wang JM. The role of chemoattractant receptors in shaping the tumor microenvironment. BIOMED RESEARCH INTERNATIONAL 2014; 2014:751392. [PMID: 25110692 PMCID: PMC4119707 DOI: 10.1155/2014/751392] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 06/17/2014] [Indexed: 12/13/2022]
Abstract
Chemoattractant receptors are a family of seven transmembrane G protein coupled receptors (GPCRs) initially found to mediate the chemotaxis and activation of immune cells. During the past decades, the functions of these GPCRs have been discovered to not only regulate leukocyte trafficking and promote immune responses, but also play important roles in homeostasis, development, angiogenesis, and tumor progression. Accumulating evidence indicates that chemoattractant GPCRs and their ligands promote the progression of malignant tumors based on their capacity to orchestrate the infiltration of the tumor microenvironment by immune cells, endothelial cells, fibroblasts, and mesenchymal cells. This facilitates the interaction of tumor cells with host cells, tumor cells with tumor cells, and host cells with host cells to provide a basis for the expansion of established tumors and development of distant metastasis. In addition, many malignant tumors of the nonhematopoietic origin express multiple chemoattractant GPCRs that increase the invasiveness and metastasis of tumor cells. Therefore, GPCRs and their ligands constitute targets for the development of novel antitumor therapeutics.
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Affiliation(s)
- Jiamin Zhou
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
- Endoscopic Center, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yi Xiang
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
- Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| | - Teizo Yoshimura
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Keqiang Chen
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Wanghua Gong
- Basic Research Program, Leidos Biomedical Research, Inc., Frederick, MD 21702, USA
| | - Jian Huang
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Ye Zhou
- Department of Gastric Cancer and Soft Tissue Surgery, Fudan University Cancer Center, Shanghai 200032, China
| | - Xiaohong Yao
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Xiuwu Bian
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Ji Ming Wang
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
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Clift IC, Bamidele AO, Rodriguez-Ramirez C, Kremer KN, Hedin KE. β-Arrestin1 and distinct CXCR4 structures are required for stromal derived factor-1 to downregulate CXCR4 cell-surface levels in neuroblastoma. Mol Pharmacol 2014; 85:542-52. [PMID: 24452472 DOI: 10.1124/mol.113.089714] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
CXC chemokine receptor 4 (CXCR4) is a G protein-coupled receptor (GPCR) located on the cell surface that signals upon binding the chemokine stromal derived factor-1 (SDF-1; also called CXCL 12). CXCR4 promotes neuroblastoma proliferation and chemotaxis. CXCR4 expression negatively correlates with prognosis and drives neuroblastoma growth and metastasis in mouse models. All functions of CXCR4 require its expression on the cell surface, yet the molecular mechanisms that regulate CXCR4 cell-surface levels in neuroblastoma are poorly understood. We characterized CXCR4 cell-surface regulation in the related SH-SY5Y and SK-N-SH human neuroblastoma cell lines. SDF-1 treatment caused rapid down-modulation of CXCR4 in SH-SY5Y cells. Pharmacologic activation of protein kinase C similarly reduced CXCR4, but via a distinct mechanism. Analysis of CXCR4 mutants delineated two CXCR4 regions required for SDF-1 treatment to decrease cell-surface CXCR4 in neuroblastoma cells: the isoleucine-leucine motif at residues 328 and 329 and residues 343-352. In contrast, and unlike CXCR4 regulation in other cell types, serines 324, 325, 338, and 339 were not required. Arrestin proteins can bind and regulate GPCR cell-surface expression, often functioning together with kinases such as G protein-coupled receptor kinase 2 (GRK2). Using SK-N-SH cells which are naturally deficient in β-arrestin1, we showed that β-arrestin1 is required for the CXCR4 343-352 region to modulate CXCR4 cell-surface expression following treatment with SDF-1. Moreover, GRK2 overexpression enhanced CXCR4 internalization, via a mechanism requiring both β-arrestin1 expression and the 343-352 region. Together, these results characterize CXCR4 structural domains and β-arrestin1 as critical regulators of CXCR4 cell-surface expression in neuroblastoma. β-Arrestin1 levels may therefore influence the CXCR4-driven metastasis of neuroblastoma as well as prognosis.
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Affiliation(s)
- Ian C Clift
- Neurobiology of Disease (I.C.C.), Molecular Pharmacology and Experimental Therapeutics (A.O.B.), and Department of Immunology (C.R.-R., K.N.K., K.E.H.), Mayo Clinic College of Medicine, Mayo Graduate School, Mayo Clinic, Rochester, Minnesota
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Zhu Q, Feng C, Liao W, Zhang Y, Tang S. Target delivery of MYCN siRNA by folate-nanoliposomes delivery system in a metastatic neuroblastoma model. Cancer Cell Int 2013; 13:65. [PMID: 23806172 PMCID: PMC3702425 DOI: 10.1186/1475-2867-13-65] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Accepted: 06/21/2013] [Indexed: 11/24/2022] Open
Abstract
Background Folate-nanoliposomes delivery system has emerged recently as a specific and safety delivery method and gradually used as the carrier of a variety kinds of drugs including compounds, plasmids and siRNAs. Methods In this study, we established a bone marrow and bone metastasis xenograft mouse model by injecting the LA-N-5 cell into the bone marrow cavity. Fluorescence microscopy, TUNEL Assay, Quantitative RT-PCR and western blot were conducted to analysis the distribution of folate-nanoliposomes entrapped MYCN (V-myc myelocytomatosis viral related oncogene) siRNA in mice and the relevant suppression effect. Results The folate-nanoliposomes entrapped MYCN siRNA can be specifically distributed in tumor tissues. Further study shows that folate-nanoliposomes entrapped MYCN siRNA lead to MYCN mRNA expression significantly down-regulated (>50%, and p < 0.05) compared with negative control siRNA treatment. MYCN protein expression was inhibited about 60% in vivo, thus induced tumor cell apoptosis markedly. Conclusion This study point to a new way for treatment of metastatic neuroblastoma and could widen the application of folate-nanoliposomes delivery system in tumor therapy.
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Affiliation(s)
- Qiqi Zhu
- Department of Pediatrics, Hainan Brach of Chinese PLA General Hospital, Haitang Bay, Sanya, Hainan Province 572013, China.
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