101
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Gao Y, Zhang E, Liu B, Zhou K, He S, Feng L, Wu G, Cao M, Wu H, Cui Y, Zhang X, Liu X, Wang Y, Gao Y, Bian X. Integrated analysis identified core signal pathways and hypoxic characteristics of human glioblastoma. J Cell Mol Med 2019; 23:6228-6237. [PMID: 31282108 PMCID: PMC6714287 DOI: 10.1111/jcmm.14507] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 04/30/2019] [Accepted: 05/30/2019] [Indexed: 12/26/2022] Open
Abstract
As a hallmark for glioblastoma (GBM), high heterogeneity causes a variety of phenotypes and therapeutic responses among GBM patients, and it contributes to treatment failure. Moreover, hypoxia is a predominant feature of GBM and contributes greatly to its phenotype. To analyse the landscape of gene expression and hypoxic characteristics of GBM cells and their clinical significance in GBM patients, we performed transcriptome analysis of the GBM cell line U87‐MG and the normal glial cell line HEB under normoxia and hypoxia conditions, with the results of which were analysed using established gene ontology databases as well as The Cancer Genome Atlas and the Cancer Cell Line Encyclopedia. We revealed core signal pathways, including inflammation, angiogenesis and migration, and for the first time mapped the components of the toll‐like receptor 6 pathway in GBM cells. Moreover, by investigating the signal pathways involved in homoeostasis, proliferation and adenosine triphosphate metabolism, the critical response of GBM to hypoxia was clarified. Experiments with cell lines, patient serum and tissue identified IL1B, CSF3 and TIMP1 as potential plasma markers and VIM, STC1, TGFB1 and HMOX1 as potential biopsy markers for GBM. In conclusion, our study provided a comprehensive understanding for signal pathways and hypoxic characteristics of GBM and identified new biomarkers for GBM patients.
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Affiliation(s)
- Yixing Gao
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Erlong Zhang
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Army Medical University, and Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, China
| | - Bao Liu
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Army Medical University, and Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, China
| | - Kai Zhou
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Shu He
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Army Medical University, and Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, China
| | - Lan Feng
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Army Medical University, and Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, China
| | - Gang Wu
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Army Medical University, and Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, China
| | - Mianfu Cao
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Haibo Wu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Youhong Cui
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Xia Zhang
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Xindong Liu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Yan Wang
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China
| | - Yuqi Gao
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Army Medical University, and Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, China
| | - Xiuwu Bian
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Army Medical University (Third Military Medical University), and Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing, China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University, Guangzhou, China
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102
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Offer S, Menard JA, Pérez JE, de Oliveira KG, Chandran VI, Johansson MC, Bång-Rudenstam A, Siesjö P, Ebbesson A, Hedenfalk I, Sundgren PC, Darabi A, Belting M. Extracellular lipid loading augments hypoxic paracrine signaling and promotes glioma angiogenesis and macrophage infiltration. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:241. [PMID: 31174567 PMCID: PMC6556032 DOI: 10.1186/s13046-019-1228-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 05/13/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Primary brain tumors, in particular glioblastoma (GBM), remain among the most challenging cancers. Like most malignant tumors, GBM is characterized by hypoxic stress that triggers paracrine, adaptive responses, such as angiogenesis and macrophage recruitment, rescuing cancer cells from metabolic catastrophe and conventional oncological treatments. The unmet need of strategies to efficiently target tumor "stressness" represents a strong clinical motivation to better understand the underlying mechanisms of stress adaptation. Here, we have investigated how lipid loading may be involved in the paracrine crosstalk between cancer cells and the stromal compartment of the hypoxic tumor microenvironment. METHODS Regions from patient GBM tumors with or without the lipid loaded phenotype were isolated by laser capture microdissection and subjected to comparative gene expression analysis in parallel with cultured GBM cells with or without lipid loading. The potential involvement of extracellular lipids in the paracrine crosstalk with stromal cells was studied by immunoprofiling of the secretome and functional studies in vitro as well as in various orthotopic GBM mouse models, including hyperlipidemic ApoE-/- mice. Statistical analyses of quantitative experimental methodologies were performed using unpaired Student's T test. For survival analyses of mouse experiments, log-rank test was used, whereas Kaplan-Meier was performed to analyze patient survival. RESULTS We show that the lipid loaded niche of GBM patient tumors exhibits an amplified hypoxic response and that the acquisition of extracellular lipids by GBM cells can reinforce paracrine activation of stromal cells and immune cells. At the functional level, we show that lipid loading augments the secretion of e.g. VEGF and HGF, and may potentiate the cross-activation of endothelial cells and macrophages. In line with these data, in vivo studies suggest that combined local tumor lipid loading and systemic hyperlipidemia of ApoE-/- mice receiving a high fat diet induces tumor vascularization and macrophage recruitment, and was shown to significantly decrease animal survival. CONCLUSIONS Together, these data identify extracellular lipid loading as a potentially targetable modulator of the paracrine adaptive response in the hypoxic tumor niche and suggest the contribution of the distinct lipid loaded phenotype in shaping the glioma microenvironment.
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Affiliation(s)
- Svenja Offer
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden.,Center for Translational Cancer Research, Technical University of Munich, Munich, Germany
| | - Julien A Menard
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden
| | - Julio Enríquez Pérez
- Department of Clinical Sciences Lund, Section of Neurosurgery, Lund University, Lund, Sweden
| | - Kelin G de Oliveira
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden
| | - Vineesh Indira Chandran
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden
| | - Maria C Johansson
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden
| | - Anna Bång-Rudenstam
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden
| | - Peter Siesjö
- Department of Clinical Sciences Lund, Section of Neurosurgery, Lund University, Lund, Sweden.,Department of Neurosurgery, Skåne University Hospital, Lund, Sweden
| | - Anna Ebbesson
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden
| | - Ingrid Hedenfalk
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden
| | - Pia C Sundgren
- Department of Clinical Sciences, Lund, Section of Diagnostic Radiology, Lund University, Lund, Sweden.,Department of Medical Imaging and Function, Skåne University Hospital, Lund, Sweden
| | - Anna Darabi
- Department of Clinical Sciences Lund, Section of Neurosurgery, Lund University, Lund, Sweden
| | - Mattias Belting
- Department of Clinical Sciences Lund, Section of Oncology and Pathology, Lund University, Barngatan 4, SE-221 85, Lund, Sweden. .,Department of Hematology, Oncology and Radiophysics, Skåne University Hospital, Lund, Sweden.
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103
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Abstract
Glioblastoma ranks among the most lethal of all human cancers. Glioblastomas display striking cellular heterogeneity, with stem-like glioblastoma stem cells (GSCs) at the apex. Although the original identification of GSCs dates back more than a decade, the purification and characterization of GSCs remains challenging. Despite these challenges, the evidence that GSCs play important roles in tumor growth and response to therapy has grown. Like normal stem cells, GSCs are functionally defined and distinguished from their differentiated tumor progeny at core transcriptional, epigenetic, and metabolic regulatory levels, suggesting that no single therapeutic modality will be universally effective against a heterogenous GSC population. Glioblastomas induce a systemic immunosuppression with mixed responses to oncoimmunologic modalities, suggesting the potential for augmentation of response with a deeper consideration of GSCs. Unfortunately, the GSC literature has been complicated by frequent use of inferior cell lines and a lack of proper functional analyses. Collectively, glioblastoma offers a reliable cancer to study cancer stem cells to better model the human disease and inform improved biologic understanding and design of novel therapeutics.
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Affiliation(s)
- Ryan C Gimple
- Division of Regenerative Medicine, Department of Medicine, University of California at San Diego, La Jolla, California 92037, USA
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Shruti Bhargava
- Division of Regenerative Medicine, Department of Medicine, University of California at San Diego, La Jolla, California 92037, USA
| | - Deobrat Dixit
- Division of Regenerative Medicine, Department of Medicine, University of California at San Diego, La Jolla, California 92037, USA
| | - Jeremy N Rich
- Division of Regenerative Medicine, Department of Medicine, University of California at San Diego, La Jolla, California 92037, USA
- Department of Neurosciences, University of California at San Diego School of Medicine, La Jolla, California 92037, USA
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104
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Zhang G, Dong Z, Prager BC, Kim LJ, Wu Q, Gimple RC, Wang X, Bao S, Hamerlik P, Rich JN. Chromatin remodeler HELLS maintains glioma stem cells through E2F3 and MYC. JCI Insight 2019; 4:126140. [PMID: 30779712 DOI: 10.1172/jci.insight.126140] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 02/14/2019] [Indexed: 12/29/2022] Open
Abstract
Glioblastomas, which contain stem cell-like glioblastoma stem cells (GSCs), are universally lethal cancers. While neural stem cells (NSCs) are usually quiescent, single-cell studies suggest that proliferating glioblastoma cells reside in the GSC population. Interrogating in silico glioma databases for epigenetic regulators that correlate with cell cycle regulation, we identified the chromatin remodeler HELLS as a potential target in glioblastoma. GSCs preferentially expressed HELLS compared with their differentiated tumor progeny and nonmalignant brain cells. Targeting HELLS disrupted GSC proliferation, survival, and self-renewal with induction of replication stress and DNA damage. Investigating potential molecular mechanisms downstream of HELLS revealed that HELLS interacted with the core oncogenic transcription factors, E2F3 and MYC, to regulate gene expression critical to GSC proliferation and maintenance. Supporting the interaction, HELLS expression strongly correlated with targets of E2F3 and MYC transcriptional activity in glioblastoma patients. The potential clinical significance of HELLS was reinforced by improved survival of tumor-bearing mice upon targeting HELLS and poor prognosis of glioma patients with elevated HELLS expression. Collectively, targeting HELLS may permit the functional disruption of the relatively undruggable MYC and E2F3 transcription factors and serve as a novel therapeutic paradigm for glioblastoma.
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Affiliation(s)
- Guoxin Zhang
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Zhen Dong
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Briana C Prager
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA.,Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Leo Jk Kim
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA.,Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Qiulian Wu
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Ryan C Gimple
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA.,Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Xiuxing Wang
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Shideng Bao
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Petra Hamerlik
- Danish Cancer Society Research Center, Copenhagen, Denmark.,Department of Drug Design and Pharmacology, Copenhagen University, Copenhagen, Denmark
| | - Jeremy N Rich
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, California, USA
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105
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High density is a property of slow-cycling and treatment-resistant human glioblastoma cells. Exp Cell Res 2019; 378:76-86. [PMID: 30844389 DOI: 10.1016/j.yexcr.2019.03.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/01/2019] [Accepted: 03/02/2019] [Indexed: 12/16/2022]
Abstract
Slow-cycling and treatment-resistant cancer cells escape therapy, providing a rationale for regrowth and recurrence in patients. Much interest has focused on identifying the properties of slow-cycling tumor cells in glioblastoma (GBM), the most common and lethal primary brain tumor. Despite aggressive ionizing radiation (IR) and treatment with the alkylating agent temozolomide (TMZ), GBM patients invariably relapse and ultimately succumb to the disease. In patient biopsies, we demonstrated that GBM cells expressing the proliferation markers Ki67 and MCM2 displayed a larger cell volume compared to rare slow-cycling tumor cells. In optimized density gradients, we isolated a minor fraction of slow-cycling GBM cells in patient biopsies and tumorsphere cultures. Transcriptional profiling, self-renewal, and tumorigenicity assays reflected the slow-cycling state of high-density GBM cells (HDGCs) compared to the tumor bulk of low-density GBM cells (LDGCs). Slow-cycling HDGCs enriched for stem cell antigens proliferated a few days after isolation to generate LDGCs. Both in vitro and in vivo, we demonstrated that HDGCs show increased treatment-resistance to IR and TMZ treatment compared to LDGCs. In conclusion, density gradients represent a non-marker based approach to isolate slow-cycling and treatment-resistant GBM cells across GBM subgroups.
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