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Zhang W, Yang F, Zheng Z, Li C, Mao S, Wu Y, Wang R, Zhang J, Zhang Y, Wang H, Li W, Huang J, Yao X. Sulfatase 2 Affects Polarization of M2 Macrophages through the IL-8/JAK2/STAT3 Pathway in Bladder Cancer. Cancers (Basel) 2022; 15:cancers15010131. [PMID: 36612128 PMCID: PMC9818157 DOI: 10.3390/cancers15010131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/13/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
Sulfatase 2 (SULF2) affects the occurrence and development of cancer by regulating HSPG-binding factors. However, the mechanism of SULF2 in bladder cancer (BCa) is unknown. To determine this, we analyzed the RNA sequencing of 90 patients with BCa. The results showed that the expression of SULF2 was closely related to the prognosis of BCa. Moreover, in vivo and in vitro experiments revealed that SULF2 promotes tumor proliferation and invasion. Furthermore, using a mouse orthotopic BCa model and flow cytometric analysis, we identified that SULF2 affects the polarization of macrophages. Mechanism studies clarified that SULF2 promoted the release of HSPG-binding factors, such as IL-8, in the microenvironment through β-catenin. Meanwhile, IL-8 activated the JAK2/STAT3 pathway of macrophages to promote the expression of CD163 and CD206, thereby regulating the polarization of macrophages to the M2-type. Conclusively, these results indicate that SULF2 plays an important role in regulating the microenvironment of BCa and promotes the polarization of macrophages to the M2-type by secreting IL-8, which further deepens the malignant progression of BCa.
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Affiliation(s)
- Wentao Zhang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Fuhan Yang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Zongtai Zheng
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Cheng Li
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Shiyu Mao
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Yuan Wu
- Department of Urology, Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, China
| | - Ruiliang Wang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Junfeng Zhang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Yue Zhang
- Department of Central Laboratory, Clinical Medicine Scientific and Technical Innovation Park, Shanghai Tenth People’s Hospital, Shanghai 200435, China
| | - Hong Wang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Wei Li
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
| | - Jianhua Huang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
- Correspondence: (J.H.); (X.Y.)
| | - Xudong Yao
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200070, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai 200070, China
- Correspondence: (J.H.); (X.Y.)
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2
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Sethi MK, Downs M, Shao C, Hackett WE, Phillips JJ, Zaia J. In-Depth Matrisome and Glycoproteomic Analysis of Human Brain Glioblastoma Versus Control Tissue. Mol Cell Proteomics 2022; 21:100216. [PMID: 35202840 PMCID: PMC8957055 DOI: 10.1016/j.mcpro.2022.100216] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 02/01/2022] [Accepted: 02/03/2022] [Indexed: 12/14/2022] Open
Abstract
Glioblastoma (GBM) is the most common and malignant primary brain tumor. The extracellular matrix, also known as the matrisome, helps determine glioma invasion, adhesion, and growth. Little attention, however, has been paid to glycosylation of the extracellular matrix components that constitute the majority of glycosylated protein mass and presumed biological properties. To acquire a comprehensive understanding of the biological functions of the matrisome and its components, including proteoglycans (PGs) and glycosaminoglycans (GAGs), in GBM tumorigenesis, and to identify potential biomarker candidates, we studied the alterations of GAGs, including heparan sulfate (HS) and chondroitin sulfate (CS), the core proteins of PGs, and other glycosylated matrisomal proteins in GBM subtypes versus control human brain tissue samples. We scrutinized the proteomics data to acquire in-depth site-specific glycoproteomic profiles of the GBM subtypes that will assist in identifying specific glycosylation changes in GBM. We observed an increase in CS 6-O sulfation and a decrease in HS 6-O sulfation, accompanied by an increase in unsulfated CS and HS disaccharides in GBM versus control samples. Several core matrisome proteins, including PGs (decorin, biglycan, agrin, prolargin, glypican-1, and chondroitin sulfate proteoglycan 4), tenascin, fibronectin, hyaluronan link protein 1 and 2, laminins, and collagens, were differentially regulated in GBM versus controls. Interestingly, a higher degree of collagen hydroxyprolination was also observed for GBM versus controls. Further, two PGs, chondroitin sulfate proteoglycan 4 and agrin, were significantly lower, about 6-fold for isocitrate dehydrogenase-mutant, compared to the WT GBM samples. Differential regulation of O-glycopeptides for PGs, including brevican, neurocan, and versican, was observed for GBM subtypes versus controls. Moreover, an increase in levels of glycosyltransferase and glycosidase enzymes was observed for GBM when compared to control samples. We also report distinct protein, peptide, and glycopeptide features for GBM subtypes comparisons. Taken together, our study informs understanding of the alterations to key matrisomal molecules that occur during GBM development. (Data are available via ProteomeXchange with identifier PXD028931, and the peaks project file is available at Zenodo with DOI 10.5281/zenodo.5911810).
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Affiliation(s)
- Manveen K Sethi
- Department of Biochemistry, Center for Biomedical Mass Spectrometry, Boston University, Boston, Massachusetts, USA
| | - Margaret Downs
- Department of Biochemistry, Center for Biomedical Mass Spectrometry, Boston University, Boston, Massachusetts, USA
| | - Chun Shao
- Department of Biochemistry, Center for Biomedical Mass Spectrometry, Boston University, Boston, Massachusetts, USA
| | - William E Hackett
- Department of Biochemistry, Center for Biomedical Mass Spectrometry, Boston University, Boston, Massachusetts, USA; Bioinformatics Program, Boston University, Boston, Massachusetts, USA
| | - Joanna J Phillips
- Department of Neurological Surgery, Brain Tumor Center, Helen Diller Family Cancer Research Center, University of California San Francisco, San Francisco, California, USA; Division of Neuropathology, Department of Pathology, University of California San Francisco, San Francisco, California, USA
| | - Joseph Zaia
- Department of Biochemistry, Center for Biomedical Mass Spectrometry, Boston University, Boston, Massachusetts, USA; Bioinformatics Program, Boston University, Boston, Massachusetts, USA.
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3
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Jiang T, Chen ZH, Chen Z, Tan D. SULF2 promotes tumorigenesis and inhibits apoptosis of cervical cancer cells through the ERK/AKT signaling pathway. ACTA ACUST UNITED AC 2020; 53:e8901. [PMID: 32049100 PMCID: PMC7006129 DOI: 10.1590/1414-431x20198901] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 11/18/2019] [Indexed: 11/22/2022]
Abstract
The objective of this study was to explore the role of the SULF2-mediated ERK/AKT signaling pathway in cervical cancer. SULF2 expression was detected in tumor tissues and tumor-adjacent normal tissues from cervical cancer patients. HeLa cells were divided into six groups: control group, NC group, SULF2 siRNA group, SULF2 group, SULF2 + LY294002 group, and SULF2 + U0125 group. In each group, HeLa cells received the corresponding treatment, followed by measurement of the cellular biological characteristics and expression of the ERK/AKT signaling pathway. We also confirmed the effect of SULF2 in vivo using a xenograft model in nude mice. SULF2 was upregulated in cervical cancer tissues, which was specifically associated with the clinical stage, histological differentiation, and lymphatic metastasis. Compared to the control group, the SULF2 siRNA group displayed decreased expression of SULF2, concomitant with reduced proliferation, migration, and invasion, but there was an increase in the apoptosis rate of HeLa cells, as well as downregulation of the p-Akt/Akt, p-ERK/ERK, and Bax/Bcl-2 ratios and cyclin D1. Additionally, tumor growth was significantly inhibited in the xenograft model of nude mice. The results in the SULF2 group were quite the opposite in which SULF2 facilitated the growth of cervical cancer cells, which was reversed by LY294002 or U0126. SULF2 is highly expressed in cervical cancer, and thus, downregulation of SULF2 can inhibit the ERK1/2 and AKT signaling pathways to suppress the proliferation, invasion, and migration of cervical cancer cells while facilitating apoptosis.
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Affiliation(s)
- Tao Jiang
- Department of Obstetrics and Gynecology, the First People's Hospital of Jingzhou City, Jingzhou, Hubei Province, China
| | - Zhao-Hui Chen
- Department of Women's Tumor, Jingzhou Cancer Hospital, Jingzhou, Hubei Province, China
| | - Zhe Chen
- Department of Obstetrics and Gynecology, the Second People's Hospital of Jingzhou City, Jingzhou, Hubei Province, China
| | - Dan Tan
- Department of Obstetrics and Gynecology, the First People's Hospital of Jingzhou City, Jingzhou, Hubei Province, China
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4
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McKinney A, Lindberg OR, Engler JR, Chen KY, Kumar A, Gong H, Lu KV, Simonds EF, Cloughesy TF, Liau LM, Prados M, Bollen AW, Berger MS, Shieh JTC, James CD, Nicolaides TP, Yong WH, Lai A, Hegi ME, Weiss WA, Phillips JJ. Mechanisms of Resistance to EGFR Inhibition Reveal Metabolic Vulnerabilities in Human GBM. Mol Cancer Ther 2019; 18:1565-1576. [PMID: 31270152 DOI: 10.1158/1535-7163.mct-18-1330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 05/10/2019] [Accepted: 06/28/2019] [Indexed: 12/23/2022]
Abstract
Amplification of the epidermal growth factor receptor gene (EGFR) represents one of the most commonly observed genetic lesions in glioblastoma (GBM); however, therapies targeting this signaling pathway have failed clinically. Here, using human tumors, primary patient-derived xenografts (PDX), and a murine model for GBM, we demonstrate that EGFR inhibition leads to increased invasion of tumor cells. Further, EGFR inhibitor-treated GBM demonstrates altered oxidative stress, with increased lipid peroxidation, and generation of toxic lipid peroxidation products. A tumor cell subpopulation with elevated aldehyde dehydrogenase (ALDH) levels was determined to comprise a significant proportion of the invasive cells observed in EGFR inhibitor-treated GBM. Our analysis of the ALDH1A1 protein in newly diagnosed GBM revealed detectable ALDH1A1 expression in 69% (35/51) of the cases, but in relatively low percentages of tumor cells. Analysis of paired human GBM before and after EGFR inhibitor therapy showed an increase in ALDH1A1 expression in EGFR-amplified tumors (P < 0.05, n = 13 tumor pairs), and in murine GBM ALDH1A1-high clones were more resistant to EGFR inhibition than ALDH1A1-low clones. Our data identify ALDH levels as a biomarker of GBM cells with high invasive potential, altered oxidative stress, and resistance to EGFR inhibition, and reveal a therapeutic target whose inhibition should limit GBM invasion.
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Affiliation(s)
- Andrew McKinney
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Olle R Lindberg
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Jane R Engler
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Katharine Y Chen
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Anupam Kumar
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Henry Gong
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Kan V Lu
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Erin F Simonds
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California.,Department of Neurology, University of California, San Francisco, San Francisco, California
| | - Timothy F Cloughesy
- UCLA Neuro-Oncology Program, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California.,Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Linda M Liau
- UCLA Neuro-Oncology Program, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California.,Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Michael Prados
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Andrew W Bollen
- Department of Pathology, Division of Neuropathology, University of California, San Francisco, San Francisco, California
| | - Mitchel S Berger
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Joseph T C Shieh
- Division of Medical Genetics, Department of Pediatrics, UCSF Benioff Children's Hospital, University of California, San Francisco, San Francisco, California.,Institute for Human Genetics, University of California, San Francisco, San Francisco, California
| | - C David James
- Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Theodore P Nicolaides
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California.,Department of Pediatrics, UCSF Benioff Children's Hospital, University of California, San Francisco, San Francisco, California
| | - William H Yong
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Albert Lai
- UCLA Neuro-Oncology Program, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California.,Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Monika E Hegi
- Neuroscience Research Center and Service of Neurosurgery, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - William A Weiss
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California.,Department of Neurology, University of California, San Francisco, San Francisco, California.,Department of Pediatrics, UCSF Benioff Children's Hospital, University of California, San Francisco, San Francisco, California
| | - Joanna J Phillips
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California. .,Department of Pathology, Division of Neuropathology, University of California, San Francisco, San Francisco, California
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5
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Lindberg OR, McKinney A, Engler JR, Koshkakaryan G, Gong H, Robinson AE, Ewald AJ, Huillard E, David James C, Molinaro AM, Shieh JT, Phillips JJ. GBM heterogeneity as a function of variable epidermal growth factor receptor variant III activity. Oncotarget 2018; 7:79101-79116. [PMID: 27738329 PMCID: PMC5346701 DOI: 10.18632/oncotarget.12600] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 09/29/2016] [Indexed: 11/25/2022] Open
Abstract
Abnormal activation of the epidermal growth factor receptor (EGFR) due to a deletion of exons 2-7 of EGFR (EGFRvIII) is a common alteration in glioblastoma (GBM). While this alteration can drive gliomagenesis, tumors harboring EGFRvIII are heterogeneous. To investigate the role for EGFRvIII activation in tumor phenotype we used a neural progenitor cell-based murine model of GBM driven by EGFR signaling and generated tumor progenitor cells with high and low EGFRvIII activation, pEGFRHi and pEGFRLo. In vivo, ex vivo, and in vitro studies suggested a direct association between EGFRvIII activity and increased tumor cell proliferation, decreased tumor cell adhesion to the extracellular matrix, and altered progenitor cell phenotype. Time-lapse confocal imaging of tumor cells in brain slice cultures demonstrated blood vessel co-option by tumor cells and highlighted differences in invasive pattern. Inhibition of EGFR signaling in pEGFRHi promoted cell differentiation and increased cell-matrix adhesion. Conversely, increased EGFRvIII activation in pEGFRLo reduced cell-matrix adhesion. Our study using a murine model for GBM driven by a single genetic driver, suggests differences in EGFR activation contribute to tumor heterogeneity and aggressiveness.
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Affiliation(s)
- Olle R Lindberg
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, CA, USA
| | - Andrew McKinney
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, CA, USA
| | - Jane R Engler
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, CA, USA
| | - Gayane Koshkakaryan
- Touro University California, College of Osteopathic Medicine, Vallejo, CA, USA
| | - Henry Gong
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, CA, USA
| | - Aaron E Robinson
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, CA, USA
| | - Andrew J Ewald
- Departments of Cell Biology, Oncology, and Biomedical Engineering, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Emmanuelle Huillard
- Université Pierre et Marie Curie (UPMC) UMR-S975, Inserm U1127, CNRS UMR7225, Institut du Cerveau et de la Moelle Epiniere, Paris, France
| | - C David James
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Annette M Molinaro
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, CA, USA.,Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.,Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| | - Joseph T Shieh
- Institute for Human Genetics, Department of Pediatrics, University of California, San Francisco, CA, USA
| | - Joanna J Phillips
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, CA, USA.,Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.,Department of Pathology, Division of Neuropathology, University of California, San Francisco, CA, USA
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6
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Tran VM, Wade A, McKinney A, Chen K, Lindberg OR, Engler JR, Persson AI, Phillips JJ. Heparan Sulfate Glycosaminoglycans in Glioblastoma Promote Tumor Invasion. Mol Cancer Res 2017; 15:1623-1633. [PMID: 28778876 DOI: 10.1158/1541-7786.mcr-17-0352] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 07/28/2017] [Accepted: 08/01/2017] [Indexed: 01/18/2023]
Abstract
Glioblastoma (GBM) is the most common primary malignant brain tumor of adults and confers a poor prognosis due, in part, to diffuse invasion of tumor cells. Heparan sulfate (HS) glycosaminoglycans, present on the cell surface and in the extracellular matrix, regulate cell signaling pathways and cell-microenvironment interactions. In GBM, the expression of HS glycosaminoglycans and the enzymes that regulate their function are altered, but the actual HS content and structure are unknown. However, inhibition of HS glycosaminoglycan function is emerging as a promising therapeutic strategy for some cancers. In this study, we use liquid chromatography-mass spectrometry analysis to demonstrate differences in HS disaccharide content and structure across four patient-derived tumorsphere lines (GBM1, 5, 6, 43) and between two murine tumorsphere lines derived from murine GBM with enrichment of mesenchymal and proneural gene expression (mMES and mPN, respectively) markers. In GBM, the heterogeneous HS content and structure across patient-derived tumorsphere lines suggested diverse functions in the GBM tumor microenvironment. In GBM5 and mPN, elevated expression of sulfatase 2 (SULF2), an extracellular enzyme that alters ligand binding to HS, was associated with low trisulfated HS disaccharides, a substrate of SULF2. In contrast, other primary tumorsphere lines had elevated expression of the HS-modifying enzyme heparanase (HPSE). Using gene editing strategies to inhibit HPSE, a role for HPSE in promoting tumor cell adhesion and invasion was identified. These studies characterize the heterogeneity in HS glycosaminoglycan content and structure across GBM and reveal their role in tumor cell invasion.Implications: HS-interacting factors promote GBM invasion and are potential therapeutic targets. Mol Cancer Res; 15(11); 1623-33. ©2017 AACR.
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Affiliation(s)
- Vy M Tran
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Anna Wade
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Andrew McKinney
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Katharine Chen
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Olle R Lindberg
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Jane R Engler
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California
| | - Anders I Persson
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California.,Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California.,Sandler Neurosciences Center, Department of Neurology, University of California, San Francisco, San Francisco, California
| | - Joanna J Phillips
- Department of Neurological Surgery, Brain Tumor Center, University of California, San Francisco, San Francisco, California. .,Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California.,Division of Neuropathology, Department of Pathology, University of California, San Francisco, San Francisco, California
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7
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Li JP, Kusche-Gullberg M. Heparan Sulfate: Biosynthesis, Structure, and Function. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2016; 325:215-73. [PMID: 27241222 DOI: 10.1016/bs.ircmb.2016.02.009] [Citation(s) in RCA: 182] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Heparan sulfate (HS) proteoglycans (PGs) are ubiquitously expressed on cell surfaces and in the extracellular matrix of most animal tissues, having essential functions in development and homeostasis, as well as playing various roles in disease processes. The functions of HSPGs are mainly dependent on interactions between the HS-side chains with a variety of proteins including cytokines, growth factors, and their receptors. In a given HS polysaccharide, negatively charged sulfate and carboxylate groups are arranged in various types of domains, generated through strictly regulated biosynthetic reactions and with enormous potential for structural variability. The mode of HS-protein interactions is assessed through binding experiments using saccharides of defined composition in vitro, signaling assays in cell models where HS structures are manipulated, and targeted disruption of genes for biosynthetic enzymes in animals (mouse, zebrafish, Drosophila, and Caenorhabditis elegans) followed by phenotype analysis. Whereas some protein ligands appear to require strictly defined HS structure, others bind to variable saccharide domains without apparent dependence on distinct saccharide sequence. These findings raise intriguing questions concerning the functional significance of regulation in HS biosynthesis and the potential for development of therapeutics targeting HS-protein interactions.
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Affiliation(s)
- J-P Li
- Department of Medical Biochemistry and Microbiology, University of Uppsala, Uppsala, Sweden; SciLifeLab, University of Uppsala, Uppsala, Sweden.
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