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Sadeghirad H, Bahrami T, Layeghi SM, Yousefi H, Rezaei M, Hosseini-Fard SR, Radfar P, Warkiani ME, O'Byrne K, Kulasinghe A. Immunotherapeutic targets in non-small cell lung cancer. Immunology 2023; 168:256-272. [PMID: 35933597 DOI: 10.1111/imm.13562] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 08/02/2022] [Indexed: 01/17/2023] Open
Abstract
Non-small cell lung cancer (NSCLC) is one of the most common types of cancer in the world and has a 5-year survival rate of ~20%. Immunotherapies have shown promising results leading to durable responses, however, they are only effective for a subset of patients. To determine the best therapeutic approach, a thorough and in-depth profiling of the tumour microenvironment (TME) is required. The TME is a complex network of cell types that form an interconnected network, promoting tumour cell initiation, growth and dissemination. The stroma, immune cells and endothelial cells that comprise the TME generate a plethora of cytotoxic or cytoprotective signalling pathways. In this review, we discuss immunotherapeutic targets in NSCLC tumours and how the TME may influence patients' response to immunotherapy.
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Affiliation(s)
- Habib Sadeghirad
- University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Tayyeb Bahrami
- Liver and Digestive Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Sepideh M Layeghi
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hassan Yousefi
- Department of Biochemistry and Molecular Biology, LSUHSC School of Medicine, New Orleans, Louisiana, USA
| | - Meysam Rezaei
- School of Biomedical Engineering, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Seyed R Hosseini-Fard
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Payar Radfar
- School of Biomedical Engineering, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Majid E Warkiani
- School of Biomedical Engineering, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Ken O'Byrne
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Arutha Kulasinghe
- University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
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2
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Lysyl Oxidase Family Proteins: Prospective Therapeutic Targets in Cancer. Int J Mol Sci 2022; 23:ijms232012270. [PMID: 36293126 PMCID: PMC9602794 DOI: 10.3390/ijms232012270] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/03/2022] [Accepted: 10/08/2022] [Indexed: 11/06/2022] Open
Abstract
The lysyl oxidase (LOX) family, consisting of LOX and LOX-like proteins 1–4 (LOXL1–4), is responsible for the covalent crosslinking of collagen and elastin, thus maintaining the stability of the extracellular matrix (ECM) and functioning in maintaining connective tissue function, embryonic development, and wound healing. Recent studies have found the aberrant expression or activity of the LOX family occurs in various types of cancer. It has been proved that the LOX family mainly performs tumor microenvironment (TME) remodeling function and is extensively involved in tumor invasion and metastasis, immunomodulation, proliferation, apoptosis, etc. With relevant translational research in progress, the LOX family is expected to be an effective target for tumor therapy. Here, we review the research progress of the LOX family in tumor progression and therapy to provide novel insights for future exploration of relevant tumor mechanism and new therapeutic targets.
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Laurentino TDS, Soares RDS, Marie SKN, Oba-Shinjo SM. Correlation of Matrisome-Associatted Gene Expressions with LOX Family Members in Astrocytomas Stratified by IDH Mutation Status. Int J Mol Sci 2022; 23:ijms23179507. [PMID: 36076905 PMCID: PMC9455728 DOI: 10.3390/ijms23179507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 08/02/2022] [Accepted: 08/16/2022] [Indexed: 12/05/2022] Open
Abstract
Tumor cell infiltrative ability into surrounding brain tissue is a characteristic of diffusely infiltrative astrocytoma and is strongly associated with extracellular matrix (ECM) stiffness. Collagens are the most abundant ECM scaffolding proteins and contribute to matrix organization and stiffness. LOX family members, copper-dependent amine oxidases, participate in the collagen and elastin crosslinking that determine ECM tensile strength. Common IDH mutations in lower-grade gliomas (LGG) impact prognosis and have been associated with ECM stiffness. We analyzed the expression levels of LOX family members and matrisome-associated genes in astrocytoma stratified by malignancy grade and IDH mutation status. A progressive increase in expression of all five LOX family members according to malignancy grade was found. LOX, LOXL1, and LOXL3 expression correlated with matrisome gene expressions. LOXL1 correlations were detected in LGG with IDH mutation (IDHmut), LOXL3 correlations in LGG with IDH wild type (IDHwt) and strong LOX correlations in glioblastoma (GBM) were found. These increasing correlations may explain the increment of ECM stiffness and tumor aggressiveness from LGG-IDHmut and LGG-IDHwt through to GBM. The expression of the mechanosensitive transcription factor, β-catenin, also increased with malignancy grade and was correlated with LOXL1 and LOXL3 expression, suggesting involvement of this factor in the outside–in signaling pathway.
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Liburkin-Dan T, Toledano S, Neufeld G. Lysyl Oxidase Family Enzymes and Their Role in Tumor Progression. Int J Mol Sci 2022; 23:6249. [PMID: 35682926 PMCID: PMC9181702 DOI: 10.3390/ijms23116249] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/26/2022] [Accepted: 05/31/2022] [Indexed: 02/06/2023] Open
Abstract
The five genes of the lysyl oxidase family encode enzymes that covalently cross-link components of the extracellular matrix, such as various types of collagen and elastin, and, thus, promote the stabilization of extracellular matrixes. Several of these genes, in particular lysyl oxidase (LOX) and lysyl oxidase like-2 (LOXL2) were identified as genes that are upregulated by hypoxia, and promote tumor cells invasion and metastasis. Here, we focus on the description of the diverse molecular mechanisms by which the various lysyl oxidases affect tumor progression. We also describe attempts that have been made, and are still on-going, that focus on the development of efficient lysyl oxidase inhibitors for the treatment of various forms of cancer, and of diseases associated with abnormal fibrosis.
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Affiliation(s)
| | | | - Gera Neufeld
- Cancer Research and Vascular Biology Center, The Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa 31096, Israel; (T.L.-D.); (S.T.)
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Perryman L, Gray SG. Fibrosis in Mesothelioma: Potential Role of Lysyl Oxidases. Cancers (Basel) 2022; 14:981. [PMID: 35205728 PMCID: PMC8870010 DOI: 10.3390/cancers14040981] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 12/13/2022] Open
Abstract
Immunotherapies (such as checkpoint inhibitors) and standard chemotherapies (such as cisplatin) have limitations in the successful treatment of malignant pleural mesothelioma (MPM). Fibrosis is the accumulation of collagen in the extracellular matrix (ECM) of tissues, making them denser than that of healthy tissues and thereby affecting drug delivery and immune cell infiltration. Moreover, fibrosis severely affects the patient's breathing and quality of life. The production of collagen and its assembly is highly regulated by various enzymes such as lysyl oxidases. Many solid tumors aberrantly express the family of lysyl oxidases (LOX/LOXL). This review examines how LOX/LOXLs were found to be dysregulated in noncancerous and cancerous settings, discusses their roles in solid tumor fibrosis and pathogenesis and explores the role of fibrosis in the development and poor clinical outcomes of patients with MPM. We examine the current preclinical status of drugs targeting LOX/LOXLs and how the incorporation of such drugs may have therapeutic benefits in the treatment and management of patients with MPM.
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Affiliation(s)
- Lara Perryman
- Drug Discovery Department, Pharmaxis Ltd., Sydney, NSW 2086, Australia;
| | - Steven G. Gray
- Thoracic Oncology, Labmed Directorate, St James’s Hospital, D08 RX0X Dublin, Ireland
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Zhu J, Luo C, Zhao J, Zhu X, Lin K, Bu F, Yu Z, Zou F, Zhu Z. Expression of LOX Suggests Poor Prognosis in Gastric Cancer. Front Med (Lausanne) 2021; 8:718986. [PMID: 34595188 PMCID: PMC8476844 DOI: 10.3389/fmed.2021.718986] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/24/2021] [Indexed: 12/19/2022] Open
Abstract
Background: Lysyl oxidase (LOX) is a key enzyme for the cross-linking of collagen and elastin in the extracellular matrix. This study evaluated the prognostic role of LOX in gastric cancer (GC) by analyzing the data of The Cancer Genome Atlas (TCGA) and the Gene Expression Omnibus (GEO) dataset. Methods: The Wilcoxon rank-sum test was used to calculate the expression difference of LOX gene in gastric cancer and normal tissues. Western blot and immunohistochemical staining were used to evaluate the expression level of LOX protein in gastric cancer. Kaplan-Meier analysis was used to calculate the survival difference between the high expression group and the low expression group in gastric cancer. The relationship between statistical clinicopathological characteristics and LOX gene expression was analyzed by Wilcoxon or Kruskal-Wallis test and logistic regression. Univariate and multivariate Cox regression analysis was used to find independent risk factors affecting the prognosis of GC patients. Gene set enrichment analysis (GSEA) was used to screen the possible mechanisms of LOX and GC. The CIBERSORT calculation method was used to evaluate the distribution of tumor-infiltrating immune cell (TIC) abundance. Results: LOX is highly expressed in gastric cancer tissues and is significantly related to poor overall survival. Wilcoxon or Kruskal-Wallis test and Logistic regression analysis showed, LOX overexpression is significantly correlated with T-stage progression in gastric cancer. Multivariate Cox regression analysis on TCGA and GEO data found that LOX (all p < 0.05) is an independent factor for poor GC prognosis. GSEA showed that high LOX expression is related to ECM receptor interaction, cancer, Hedgehog, TGF-beta, JAK-STAT, MAPK, Wnt, and mTOR signaling pathways. The expression level of LOX affects the immune activity of the tumor microenvironment in gastric cancer. Conclusion: High expression of LOX is a potential molecular indicator for poor prognosis of gastric cancer.
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Affiliation(s)
- Jinfeng Zhu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Chen Luo
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jiefeng Zhao
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiaojian Zhu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Kang Lin
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Fanqin Bu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhonglin Yu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Feilong Zou
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhengming Zhu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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Choi JY, Seok HJ, Kim RK, Choi MY, Lee SJ, Bae IH. miR-519d-3p suppresses tumorigenicity and metastasis by inhibiting Bcl-w and HIF-1α in NSCLC. Mol Ther Oncolytics 2021; 22:368-379. [PMID: 34553025 PMCID: PMC8430049 DOI: 10.1016/j.omto.2021.06.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 06/30/2021] [Indexed: 12/11/2022] Open
Abstract
Bcl-w, a member of the Bcl-2 family, is highly expressed in various solid tumor, including lung cancer, suggesting that it is involved in cancer cell survival and carcinogenesis. Solid cancer-induced hypoxia has been reported to increase angiogenesis, growth factor, gene instability, invasion, and metastasis. Despite many studies on the treatment of non-small cell lung cancer (NSCLC) with a high incidence rate, the survival rate of patients has not improved because the cancer cells acquired resistance to treatment. This study investigated the correlation between Bcl-w expression and hypoxia in tumor malignancy of NSCLC. Meanwhile, microRNAs (miRNAs) are involved in a variety of key signaling mechanisms associated with hypoxia. Therefore, we discovered miR-519d-3p, which inhibits the expression of Bcl-w and hypoxia-inducing factor (HIF)-1α, and found that it reduces hypoxia-induced tumorigenesis. Spearman's correlation analysis showed that the expression levels of miR-519d-3p and Bcl-w/HIF-1α were negatively correlated, respectively. This showed that miR-519d-3p can be used as a diagnostic biomarker and target therapy for NSCLC.
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Affiliation(s)
- Jae Yeon Choi
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic of Korea
| | - Hyun Jeong Seok
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic of Korea
| | - Rae-Kwon Kim
- Department of Life Science, Hanyang University, Seoul, Republic of Korea
| | - Mi Young Choi
- Department of Life Science, Hanyang University, Seoul, Republic of Korea
| | - Su-Jae Lee
- Department of Life Science, Hanyang University, Seoul, Republic of Korea
| | - In Hwa Bae
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic of Korea
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Belluomini L, Dodi A, Caldart A, Kadrija D, Sposito M, Casali M, Sartori G, Ferrara MG, Avancini A, Bria E, Menis J, Milella M, Pilotto S. A narrative review on tumor microenvironment in oligometastatic and oligoprogressive non-small cell lung cancer: a lot remains to be done. Transl Lung Cancer Res 2021; 10:3369-3384. [PMID: 34430373 PMCID: PMC8350097 DOI: 10.21037/tlcr-20-1134] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 04/19/2021] [Indexed: 12/14/2022]
Abstract
Objective In this review, we aim to collect and discuss available data about the role and composition of tumor microenvironment (TME) in oligometastatic (OMD) and oligoprogressive (OPD) non-small cell lung cancer (NSCLC). Furthermore, we aim to summarize the ongoing clinical trials evaluating as exploratory objective the TME composition, through tissue and/or blood samples, in order to clarify whether TME and its components could explain, at least partially, the oligometastatic/oligoprogressive process and could unravel the existence of predictive and/or prognostic factors for local ablative therapy (LAT). Background OMD/OPD NSCLC represent a heterogeneous group of diseases. Several data have shown that TME plays an important role in tumor progression and therefore in treatment response. The crucial role of several types of cells and molecules such as immune cells, cytokines, integrins, protease and adhesion molecules, tumor-associated macrophages (TAMs) and mesenchymal stem cells (MSCs) has been widely established. Due to the peculiar activation of specific pathways and expression of adhesion molecules, metastatic cells seem to show a tropism for specific anatomic sites (the so-called “seed and soil” hypothesis). Based on this theory, metastases appear as a biologically driven process rather than a random release of cancer cells. Although the role and the function of TME at the time of progression in patients with NSCLC treated with tyrosine-kinase inhibitors and immune checkpoint inhibitors (ICIs) have been investigated, limited data about the role and the biological meaning of TME are available in the specific OMD/OPD setting. Methods Through a comprehensive PubMed and ClinicalTrials.gov search, we identified available and ongoing studies exploring the role of TME in oligometastatic/oligoprogressive NSCLC. Conclusions Deepening the knowledge on TME composition and function in OMD/OPD may provide innovative implications in terms of both prognosis and prediction of outcome in particular from local treatments, paving the way for future investigations of personalized approaches in both advanced and early disease settings.
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Affiliation(s)
- Lorenzo Belluomini
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Alessandra Dodi
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Alberto Caldart
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Dzenete Kadrija
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Marco Sposito
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Miriam Casali
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Giulia Sartori
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Miriam Grazia Ferrara
- Comprehensive Cancer Center, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy; Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Alice Avancini
- Biomedical, Clinical and Experimental Sciences, Department of Medicine, University of Verona Hospital Trust, Verona, Italy
| | - Emilio Bria
- Comprehensive Cancer Center, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy; Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Jessica Menis
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy.,Medical Oncology Department, Istituto Oncologico Veneto IRCCS, Padova, Italy
| | - Michele Milella
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
| | - Sara Pilotto
- Section of Oncology, Department of Medicine, University of Verona School of Medicine and Verona University Hospital Trust, Verona, Italy
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Takemoto R, Kamiya T, Atobe T, Hara H, Adachi T. Regulation of lysyl oxidase expression in THP-1 cell-derived M2-like macrophages. J Cell Biochem 2021; 122:777-786. [PMID: 33644883 DOI: 10.1002/jcb.29911] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/27/2021] [Accepted: 02/08/2021] [Indexed: 01/16/2023]
Abstract
Lysyl oxidase (LOX) is a copper-containing enzyme and its overexpression in tumor tissues promote tumor metastasis through the crosslinking of extracellular matrix. Our previous report demonstrated that LOX expression is significantly increased in human leukemic THP-1 cell-derived M2-like macrophages, and histone modification plays a key role in its induction. However, the rigorous mechanism of LOX regulation remains unclear. In this study, we investigated the role of functional transcription factors, hypoxia-inducible factor 1α (HIF1α), signal transducer and activator of transcription 3 (STAT3) and forkhead box O1 (FOXO1) in LOX regulation in M2-like macrophages. HIF1α expression was significantly increased in M2-like macrophages, and HIF1α inhibitor, TX402, suppressed LOX induction. The significant STAT3 activation was also observed in M2-like macrophages. Additionally, LOX induction was canceled in the presence of STAT3 inhibitor, S3I-201, suggesting that HIF1α and STAT3 pathways play a critical role in LOX induction. On the other hand, our ChIP results clearly indicated that the enrichment of FOXO1 within the lox promoter region was dramatically decreased in M2-like macrophages. In this context, knockdown of FOXO1 further enhanced LOX induction. LOX induction and HIF1α binding to the lox promoter region were suppressed in FOXO1-overexpressed cells, suggesting that the FOXO1 binding to the lox promoter region counteracted HIF1α binding to that region. Overall, the present data suggested that both of HIF1α and STAT3 were required for LOX induction in M2-like macrophages, and loss of FOXO1 within the lox promoter region facilitated HIF1α binding to that region which promoted LOX induction.
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Affiliation(s)
- Ryuhei Takemoto
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan
| | - Tetsuro Kamiya
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan
| | - Taku Atobe
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan
| | - Hirokazu Hara
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan
| | - Tetsuo Adachi
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan
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Tumor Hypoxia as a Barrier in Cancer Therapy: Why Levels Matter. Cancers (Basel) 2021; 13:cancers13030499. [PMID: 33525508 PMCID: PMC7866096 DOI: 10.3390/cancers13030499] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/22/2021] [Accepted: 01/23/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Hypoxia is a common feature of solid tumors and associated with poor outcome in most cancer types and treatment modalities, including radiotherapy, chemotherapy, surgery and, most likely, immunotherapy. Emerging strategies, such as proton therapy and combination therapies with radiation and hypoxia targeted drugs, provide new opportunities to overcome the hypoxia barrier and improve therapeutic outcome. Hypoxia is heterogeneously distributed both between and within tumors and shows large variations across patients not only in prevalence, but importantly, also in level. To best exploit the emerging strategies, a better understanding of how individual hypoxia levels from mild to severe affect tumor biology is vital. Here, we discuss our current knowledge on this topic and how we should proceed to gain more insight into the field. Abstract Hypoxia arises in tumor regions with insufficient oxygen supply and is a major barrier in cancer treatment. The distribution of hypoxia levels is highly heterogeneous, ranging from mild, almost non-hypoxic, to severe and anoxic levels. The individual hypoxia levels induce a variety of biological responses that impair the treatment effect. A stronger focus on hypoxia levels rather than the absence or presence of hypoxia in our investigations will help development of improved strategies to treat patients with hypoxic tumors. Current knowledge on how hypoxia levels are sensed by cancer cells and mediate cellular responses that promote treatment resistance is comprehensive. Recently, it has become evident that hypoxia also has an important, more unexplored role in the interaction between cancer cells, stroma and immune cells, influencing the composition and structure of the tumor microenvironment. Establishment of how such processes depend on the hypoxia level requires more advanced tumor models and methodology. In this review, we describe promising model systems and tools for investigations of hypoxia levels in tumors. We further present current knowledge and emerging research on cellular responses to individual levels, and discuss their impact in novel therapeutic approaches to overcome the hypoxia barrier.
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Popper H. Primary tumor and metastasis-sectioning the different steps of the metastatic cascade. Transl Lung Cancer Res 2020; 9:2277-2300. [PMID: 33209649 PMCID: PMC7653118 DOI: 10.21037/tlcr-20-175] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Patients with lung cancer in the majority die of metastases. Treatment options include surgery, chemo- and radiotherapy, targeted therapy by tyrosine kinase inhibitors (TKIs), and immuno-oncologic treatment. Despite the success with these treatment options, cure of lung cancer is achieved in only a very small proportion of patients. In most patients’ recurrence and metastasis will occur, and finally kill the patient. Metastasis is a multistep procedure. It requires a change in adhesion of tumor cells for detachment from their neighboring cells. The next step is migration either as single cells [epithelial-mesenchymal transition (EMT)], or as cell clusters (hybrid-EMT or bulk migration). A combination of genetic changes is required to facilitate migration. Then tumor cells have to orient themselves along matrix proteins, detect oxygen concentrations, prevent attacks by immune cells, and induce a tumor-friendly switch of stroma cells (macrophages, myofibroblasts, etc.). Having entered the blood stream tumor cells need to adapt to shear stress, avoid being trapped by coagulation, but also use coagulation in small veins for adherence to endothelia, and express homing molecules for extravasation. Within a metastatic site, tumor cells need a well-prepared niche to establish a metastatic focus. Tumor cells again have to establish a vascular net for maintaining nutrition and oxygen supply, communicate with stroma cells, grow out and set further metastases. In this review the different steps will be discussed with a focus on pulmonary carcinomas. The vast amount of research manuscripts published so far are not easy to analyze: in most reports’ single steps of the metastatic cascade are interpreted as evidence for the whole process; for example, migration is interpreted as evidence for metastasis. In lung cancer most often latency periods are shorter, in between 1–5 years. In other cases, despite widespread migration occurs, tumor cells die within the circulation and do not reach a metastatic site. Therefore, migration is a requisite, but does not necessarily predict metastasis. The intention of this review is to point to these different aspects and hopefully provoke research directed into a more functional analysis of the metastatic process.
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Affiliation(s)
- Helmut Popper
- Institute of Pathology, Medical University of Graz, Graz, Austria
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12
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Bhanu U, Natarajan S, Manaktala N, Boaz K, Joshi R, Deepak S, Kp N, Lewis A. Recognition of lysyl oxidase as a potential predictive biomarker for oral squamous cell carcinoma: an immunohistochemical study. ACTA ACUST UNITED AC 2020; 69:360-369. [PMID: 32744444 DOI: 10.23736/s0026-4970.20.04356-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Lysyl oxidase (LOX) is a copper amine oxidase which belongs to the LOX multigene family and is normally involved in cross-linking of stromal collagen fibers. LOX expression has been found to be associated with increased episodes of recurrence, metastasis and overall poor prognosis in renal cell carcinomas and melanomas. This study aimed to assess the effects of LOX on the prognosis of oral squamous cell carcinoma (OSCC), which is one of the most common cancers in India. METHODS The immunohistochemical expression of lysyl oxidase using LOX2 primary antibody was assessed at the tumor proper, invasive tumor front and peritumoral stroma in tissue sections from 40 cases of histologically proven OSCC. RESULTS LOX expression was elevated in OSCC patients who had lymph node metastasis and in those who died of disease. No significant variation was seen with histological grade. CONCLUSIONS LOX has a 'pro-neoplastic' effect as it modulates the host stroma to favor increasing tumor mass and worsening prognosis. Increased expression of LOX causes increased collagen fiber cross-linkage that stiffens the stromal matrix. This increases compressive stresses contributing to tissue hypoxia that elevates Rho GTPase-dependent cytoskeletal tension leading to erratic tumor cell morphogenesis that in turn confers motility to these cells resulting in metastasis. Inhibitors of LOX can potentially down-regulate LOX levels in the tumor micro-environment by controlling tissue hypoxia and curtailing the production of hypoxic LOX molecules.
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Affiliation(s)
- Udhay Bhanu
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India
| | - Srikant Natarajan
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India
| | - Nidhi Manaktala
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India
| | - Karen Boaz
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India -
| | - Rasika Joshi
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India
| | - Sriranjani Deepak
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India
| | - Nandita Kp
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India
| | - Amitha Lewis
- Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, India
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Ye M, Song Y, Pan S, Chu M, Wang ZW, Zhu X. Evolving roles of lysyl oxidase family in tumorigenesis and cancer therapy. Pharmacol Ther 2020; 215:107633. [PMID: 32693113 DOI: 10.1016/j.pharmthera.2020.107633] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/15/2020] [Indexed: 12/21/2022]
Abstract
The lysyl oxidase (LOX) family is comprised of LOX and four LOX-like proteins (LOXL1, LOXL2, LOXL3, and LOXL4), and mainly functions in the remodeling of extracellular matrix (ECM) and the cross-linking of collagen and elastic fibers. Recently, a growing body of research has demonstrated that LOX family is critically involved in the regulation of cancer cell proliferation, migration, invasion and metastasis. In this review, we discuss the roles of LOX family members in the development and progression of different types of human cancers. Furthermore, we also describe the potential inhibitors of LOX family proteins and highlight that LOX family might be an important therapeutic target for cancer therapy.
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Affiliation(s)
- Miaomiao Ye
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Yizuo Song
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Shuya Pan
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Man Chu
- Center of Scientific Research, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Zhi-Wei Wang
- Center of Scientific Research, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China..
| | - Xueqiong Zhu
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China.
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Takemoto R, Kamiya T, Hara H, Adachi T. Lysyl oxidase expression is regulated by the H3K27 demethylase Jmjd3 in tumor-associated M2-like macrophages. J Clin Biochem Nutr 2020; 66:110-115. [PMID: 32231406 DOI: 10.3164/jcbn.19-67] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/05/2019] [Indexed: 12/22/2022] Open
Abstract
Copper is one of the essential micronutrients, and copper-containing enzymes contribute to crucial functions in the body. Lysyl oxidase is a copper-containing enzyme that remodels the extracellular matrix by cross-linking collagen and elastin. The overexpression of lysyl oxidase was recently shown to promote tumor metastasis. M2-like macrophages were also found to significantly accumulate in the tumor microenvironment, and correlated with a poor patient's outcome. We speculate that M2-like macrophages promote tumor progression via lysyl oxidase expression. Epigenetics, a mitotically heritable change in gene expression without any change in DNA sequencing, is also associated with tumor progression. However, the relationship between lysyl oxidase expression in M2-like macrophages and epigenetics remains unclear. Lysyl oxidase expression was significantly induced in human leukemic THP-1 cell-derived M2-like macrophages. Furthermore, the level of histone H3 tri-methylation at lysine 27 was decreased, and a pre-treatment with a H3K27 demethylase inhibitor notably suppressed lysyl oxidase expression in M2-like macrophages. Lysyl oxidase derived from M2-like macrophages also enhanced breast cancer cell migration, and this was suppressed by a H3K27 demethylase inhibitor. The present results suggest the mechanism of lysyl oxidase expression in M2-like macrophages as an aspect of epigenetics, particularly histone methylation.
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Affiliation(s)
- Ryuhei Takemoto
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Tetsuro Kamiya
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Hirokazu Hara
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Tetsuo Adachi
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
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15
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Mohan V, Das A, Sagi I. Emerging roles of ECM remodeling processes in cancer. Semin Cancer Biol 2019; 62:192-200. [PMID: 31518697 DOI: 10.1016/j.semcancer.2019.09.004] [Citation(s) in RCA: 181] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/01/2019] [Accepted: 09/07/2019] [Indexed: 02/07/2023]
Abstract
Extracellular matrix (ECM) plays a central and dynamic role in the creation of tumor microenvironment. Herein we discuss the emerging biophysical and biochemical aspects of ECM buildup and proteolysis in cancer niche formation. Dysregulated ECM remodeling by cancer cells facilitate irreversible proteolysis and crosslinking, which in turn influence cell signaling, micro environmental cues, angiogenesis and tissue biomechanics. Further, we introduce the emerging roles of cancer microbiome in aberrant tumor ECM remodeling and membrane bound nano-sized vesicles called exosomes in creation of distant pre-metastatic niches. A detailed molecular and biophysical understanding of the ECM morphologies and its components such as key enzymes, structural and signaling molecules are critical in identifying the next generation of therapeutic and diagnostic targets in cancer.
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Affiliation(s)
- Vishnu Mohan
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Alakesh Das
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Irit Sagi
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel.
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16
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Byun Y, Choi YC, Jeong Y, Lee G, Yoon S, Jeong Y, Yoon J, Baek K. MiR-200c downregulates HIF-1α and inhibits migration of lung cancer cells. Cell Mol Biol Lett 2019; 24:28. [PMID: 31061665 PMCID: PMC6487019 DOI: 10.1186/s11658-019-0152-2] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 04/03/2019] [Indexed: 01/10/2023] Open
Abstract
Background Hypoxia-inducible factor-1α (HIF-1α) is a transcription factor with a pivotal role in physiological and pathological responses to hypoxia. While HIF-1α is known to be involved in hypoxia-induced upregulation of microRNA (miRNA) expression, HIF-1α is also targeted by miRNAs. In this study, miRNAs targeting HIF-1α were identified and their effects on its expression and downstream target genes under hypoxic conditions were investigated. Cell migration under the same conditions was also assessed. Methods microRNAs that target HIF-1α were screened using 3′-untranslated region luciferase (3′-UTR-luciferase) reporter assays. The expression levels of HIF-1α and its downstream target genes after transfection with miRNA were assessed using quantitative RT-PCR and western blot analyses. The effect of the miRNAs on the transcriptional activity of HIF-1α was determined using hypoxia-responsive element luciferase (HRE-luciferase) assays. Cell migration under hypoxia was examined using the wound-healing assay. Results Several of the 19 screened miRNAs considerably decreased the luciferase activity. Transfection with miR-200c had substantial impact on the expression level and transcription activity of HIF-1α. The mRNA level of HIF-1α downstream genes decreased in response to miR-200c overexpression. MiR-200c inhibited cell migration in normoxia and, to a greater extent, in hypoxia. These effects were partly reversed by HIF-1α expression under hypoxic conditions. Conclusion miR-200c negatively affects hypoxia-induced responses by downregulating HIF-1α, a key regulator of hypoxia. Therefore, overexpression of miR-200c might have therapeutic potential as an anticancer agent that inhibits tumor hypoxia. Electronic supplementary material The online version of this article (10.1186/s11658-019-0152-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yuree Byun
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Young-Chul Choi
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Yunhui Jeong
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Gangtae Lee
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Sena Yoon
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Yongsu Jeong
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Jaeseung Yoon
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Kwanghee Baek
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
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Burke AA, Barrows L, Solares MJ, Wall AD, Jakobsche CE. Bifunctional Molecular Probes for Activity-Based Visualization of Quinone-Dependent Amine Oxidases. Chemistry 2018; 24:17681-17685. [PMID: 30221409 DOI: 10.1002/chem.201804247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/12/2018] [Indexed: 12/25/2022]
Abstract
The design, synthesis, and evaluation of two bifunctional molecular probes that can be used to visualize quinone-dependent amine oxidase enzymes in an activity-dependent manner are described. These probes use alkylhydrazines to irreversibly bind the target enzymes, which can then be visualized with either Western blotting or in-gel fluorescence. The results show that the Western blotting readout, which utilizes commercially available anti-nitrophenyl antibodies to detect a simple dinitrophenyl antigen, provides a stronger readout than the fluorescein-based fluorescence readout. This visualization strategy can be used to measure the potency of enzyme inhibitors by selectively visualizing the active enzyme that remains after treatment with an inhibitor. Looking forward, this probe molecule and visualization strategy will enable activity-based protein-profiling experiments, such as determining inhibitor selectivity values within full proteome mixtures, for this family of amine oxidase enzymes.
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Affiliation(s)
- Ashley A Burke
- Clark University, Carlson School of Chemistry & Biochemistry, Worcester, MA, 01610, USA
| | - Luke Barrows
- Clark University, Carlson School of Chemistry & Biochemistry, Worcester, MA, 01610, USA
| | - Maria J Solares
- Clark University, Carlson School of Chemistry & Biochemistry, Worcester, MA, 01610, USA
| | - Alexander D Wall
- Clark University, Carlson School of Chemistry & Biochemistry, Worcester, MA, 01610, USA
| | - Charles E Jakobsche
- Clark University, Carlson School of Chemistry & Biochemistry, Worcester, MA, 01610, USA
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18
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Rao G, Bansal S, Law WX, O’Dowd B, Dikanov SA, Oldfield E. Pulsed Electron Paramagnetic Resonance Insights into the Ligand Environment of Copper in Drosophila Lysyl Oxidase. Biochemistry 2017; 56:3770-3779. [DOI: 10.1021/acs.biochem.7b00308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guodong Rao
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Sandhya Bansal
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Wen Xuan Law
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Bing O’Dowd
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Sergei A. Dikanov
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Eric Oldfield
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
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Yu R, Han L, Ni X, Wang M, Xue P, Zhang L, Yuan M. Kruppel-like factor 4 inhibits non–small cell lung cancer cell growth and aggressiveness by stimulating transforming growth factor-β1-meidated ERK/JNK/NF-κB signaling pathways. Tumour Biol 2017. [PMID: 28631556 DOI: 10.1177/1010428317705574] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- Renzhi Yu
- Department of Respiratory Medicine, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Lei Han
- Department of Respiratory Medicine, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Xin Ni
- Department of Respiratory Medicine, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Minghuan Wang
- Community Health Service Center, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Ping Xue
- Department of Respiratory Medicine, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Li Zhang
- Department of Respiratory Medicine, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Mei Yuan
- Department of Respiratory Medicine, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
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Xie Q, Xie J, Tian T, Ma Q, Zhang Q, Zhu B, Cai X. Hypoxia triggers angiogenesis by increasing expression of LOX genes in 3-D culture of ASCs and ECs. Exp Cell Res 2017; 352:157-163. [DOI: 10.1016/j.yexcr.2017.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/16/2017] [Accepted: 02/08/2017] [Indexed: 10/20/2022]
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Burke AA, Severson ES, Mool S, Solares Bucaro MJ, Greenaway FT, Jakobsche CE. Comparing hydrazine-derived reactive groups as inhibitors of quinone-dependent amine oxidases. J Enzyme Inhib Med Chem 2017; 32:496-503. [PMID: 28110559 PMCID: PMC6009937 DOI: 10.1080/14756366.2016.1265518] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Lysyl oxidase has emerged as an important enzyme in cancer metastasis. Its activity has been reported to become upregulated in several types of cancer, and blocking its activity has been shown to limit the metastatic potential of various cancers. The small-molecules phenylhydrazine and β-aminopropionitrile are known to inhibit lysyl oxidase; however, issues of stability, toxicity, and poorly defined mechanisms limit their potential use in medical applications. The experiments presented herein evaluate three other families of hydrazine-derived compounds – hydrazides, alkyl hydrazines, and semicarbazides – as irreversible inhibitors of lysyl oxidase including determining the kinetic parameters and comparing the inhibition selectivities for lysyl oxidase against the topaquinone-containing diamine oxidase from lentil seedlings. The results suggest that the hydrazide group may be a useful core functionality that can be developed into potent and selective inhibitors of lysyl oxidase and eventually find application in cancer metastasis research.
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Affiliation(s)
- Ashley A Burke
- a Carlson School of Chemistry and Biochemistry, Clark University , Worcester , MA , USA
| | - Elizabeth S Severson
- a Carlson School of Chemistry and Biochemistry, Clark University , Worcester , MA , USA
| | - Shreya Mool
- a Carlson School of Chemistry and Biochemistry, Clark University , Worcester , MA , USA
| | | | - Frederick T Greenaway
- a Carlson School of Chemistry and Biochemistry, Clark University , Worcester , MA , USA
| | - Charles E Jakobsche
- a Carlson School of Chemistry and Biochemistry, Clark University , Worcester , MA , USA
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Hepatocyte Hypoxia Inducible Factor-1 Mediates the Development of Liver Fibrosis in a Mouse Model of Nonalcoholic Fatty Liver Disease. PLoS One 2016; 11:e0168572. [PMID: 28030556 PMCID: PMC5193414 DOI: 10.1371/journal.pone.0168572] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 12/03/2016] [Indexed: 12/21/2022] Open
Abstract
Background Obstructive sleep apnea (OSA) is associated with the progression of non-alcoholic fatty liver disease (NAFLD) to steatohepatitis and fibrosis. This progression correlates with the severity of OSA-associated hypoxia. In mice with diet induced obesity, hepatic steatosis leads to liver tissue hypoxia, which worsens with exposure to intermittent hypoxia. Emerging data has implicated hepatocyte cell signaling as an important factor in hepatic fibrogenesis. We hypothesized that hepatocyte specific knockout of the oxygen sensing α subunit of hypoxia inducible factor-1 (HIF-1), a master regulator of the global response to hypoxia, may be protective against the development of liver fibrosis. Methods Wild-type mice and mice with hepatocyte-specific HIF-1α knockout (Hif1a-/-hep) were fed a high trans-fat diet for six months, as a model of NAFLD. Hepatic fibrosis was evaluated by Sirius red stain and hydroxyproline assay. Liver enzymes, fasting insulin, and hepatic triglyceride content were also assessed. Hepatocytes were isolated from Hif1a-/-hep mice and wild-type controls and were exposed to sustained hypoxia (1% O2) or normoxia (16% O2) for 24 hours. The culture media was used to reconstitute type I collagen and the resulting matrices were examined for collagen cross-linking. Results Wild-type mice on a high trans-fat diet had 80% more hepatic collagen than Hif1a-/-hep mice (2.21 μg collagen/mg liver tissue, versus 1.23 μg collagen/mg liver tissue, p = 0.03), which was confirmed by Sirius red staining. Body weight, liver weight, mean hepatic triglyceride content, and fasting insulin were similar between groups. Culture media from wild-type mouse hepatocytes exposed to hypoxia allowed for avid collagen cross-linking, but very little cross-linking was seen when hepatocytes were exposed to normoxia, or when hepatocytes from Hif1a-/-hep mice were used in hypoxia or normoxia. Conclusions Hepatocyte HIF-1 mediates an increase in liver fibrosis in a mouse model of NAFLD, perhaps due to liver tissue hypoxia in hepatic steatosis. HIF-1 is necessary for collagen cross-linking in an in vitro model of fibrosis.
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Abstract
Metastasis in lung cancer is a multifaceted process. In this review, we will dissect the process in several isolated steps such as angiogenesis, hypoxia, circulation, and establishment of a metastatic focus. In reality, several of these processes overlap and occur even simultaneously, but such a presentation would be unreadable. Metastasis requires cell migration toward higher oxygen tension, which is based on changing the structure of the cell (epithelial-mesenchymal transition), orientation within the stroma and stroma interaction, and communication with the immune system to avoid attack. Once in the blood stream, cells have to survive trapping by the coagulation system, to survive shear stress in small blood vessels, and to find the right location for extravasation. Once outside in the metastatic locus, tumor cells have to learn the communication with the “foreign” stroma cells to establish vascular supply and again express molecules, which induce immune tolerance.
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Wang J, Zhu Y, Tan J, Meng X, Xie H, Wang R. Lysyl oxidase promotes epithelial-to-mesenchymal transition during paraquat-induced pulmonary fibrosis. MOLECULAR BIOSYSTEMS 2016; 12:499-507. [PMID: 26670953 DOI: 10.1039/c5mb00698h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Lysyl oxidase (LOX) is a copper-dependent amine oxidase that plays a critical role in pulmonary fibrosis. Our previous study demonstrated that epithelial-to-mesenchymal transition (EMT) was strongly associated with paraquat (PQ) induced pulmonary fibrosis. This present study was aimed to evaluate the potential involvement of LOX on EMT in the process of pulmonary fibrosis induced by PQ. We established an in vivo rat model and an in vitro cell model induced by PQ treatment and found that LOX protein expression was significantly up-regulated and collagen deposition was enhanced in rats. The EMT process was strongly found in A549 and RLE-6TN cells after PQ exposure. After inactivating LOX with an inhibitor, pulmonary fibrosis was significantly reduced and EMT was also suppressed. Additionally, small interfering RNA (siRNA) targeting LOX was used to silence LOX expression to observe EMT in A549 cells. As a result, LOX could promote the progress of EMT, and inactivating LOX alleviated the EMT process in PQ-induced pulmonary fibrosis and mesenchymal-to-epithelial transition (MET) occurred after inactivating LOX in vitro and in vivo. In conclusion, LOX could promote the progress of EMT and inactivating LOX alleviated EMT in PQ-induced pulmonary fibrosis. Therefore, LOX could potentially be a new candidate therapeutic target for pulmonary fibrosis induced by PQ by regulating the balance between EMT and MET.
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Affiliation(s)
- Jinfeng Wang
- Department of Intensive Care Unit, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 201620, China.
| | - Yong Zhu
- Department of Intensive Care Unit, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 201620, China.
| | - Jiuting Tan
- Department of Intensive Care Unit, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 201620, China.
| | - Xiaoxiao Meng
- Department of Intensive Care Unit, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 201620, China.
| | - Hui Xie
- Department of Intensive Care Unit, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 201620, China.
| | - Ruilan Wang
- Department of Intensive Care Unit, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 201620, China.
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Zheng W, Wang X, Chen Q, Fang K, Wang L, Chen F, Li X, Li Z, Wang J, Liu Y, Yang D, Song X. Low extracellular lysyl oxidase expression is associated with poor prognosis in patients with prostate cancer. Oncol Lett 2016; 12:3161-3166. [PMID: 27899976 PMCID: PMC5103911 DOI: 10.3892/ol.2016.5118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 07/22/2016] [Indexed: 01/07/2023] Open
Abstract
Remodeling of the extracellular matrix (ECM), which is induced by lysyl oxidase (LOX), has been demonstrated to accompany tumor progression; however, the association between LOX expression levels and the malignant behavior of prostate cancer (Pca) remains unclear. The present study aimed to analyze the tumor-associated expression profile of LOX in patients with Pca and to evaluate its potential prognostic value. In the form of a retrospective study, the expression patterns of LOX and collagen I were analyzed in patients with benign prostate hyperplasia and Pca by immunohistochemical examination. The results demonstrated that, with the initiation and progression of Pca, the expression levels of LOX and collagen I were closely associated with Gleason score and tumor stage. In addition, although LOX was expressed in cancer and non-cancer tissues, the differential expression pattern observed in the ECM of Pca cells may indicate that LOX is an important molecule that affects the progression of this disease. Therefore, LOX expression level in the ECM may function as an independent predictor of Pca.
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Affiliation(s)
- Wei Zheng
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Xuejian Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Qiwei Chen
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Kun Fang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Lina Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Feng Chen
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Xiancheng Li
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Ziyao Li
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Jianbo Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Yingxi Liu
- Department of Biomedical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China
| | - Deyong Yang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China; Department of Biomedical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China
| | - Xishuang Song
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
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A simple non-perturbing cell migration assay insensitive to proliferation effects. Sci Rep 2016; 6:31694. [PMID: 27535324 PMCID: PMC4989229 DOI: 10.1038/srep31694] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 07/25/2016] [Indexed: 11/13/2022] Open
Abstract
Migration is a fundamental cellular behavior that plays an indispensable role in development and homeostasis, but can also contribute to pathology such as cancer metastasis. Due to its relevance to many aspects of human health, the ability to accurately measure cell migration is of broad interest, and numerous approaches have been developed. One of the most commonly employed approaches, because of its simplicity and throughput, is the exclusion zone assay in which cells are allowed to migrate into an initially cell-free region. A major drawback of this assay is that it relies on simply counting cells in the exclusion zone and therefore cannot distinguish the effects of proliferation from migration. We report here a simple modification to the exclusion zone migration assay that exclusively measures cell migration and is not affected by proliferation. This approach makes use of a lineage-tracing vital stain that is retained through cell generations and effectively reads out migration relative to the original, parental cell population. This modification is simple, robust, non-perturbing, and inexpensive. We validate the method in a panel of cell lines under conditions that inhibit or promote migration and demonstrate its use in normal and cancer cell lines as well as primary cells.
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Kasashima H, Yashiro M, Kinoshita H, Fukuoka T, Morisaki T, Masuda G, Sakurai K, Kubo N, Ohira M, Hirakawa K. Lysyl oxidase is associated with the epithelial-mesenchymal transition of gastric cancer cells in hypoxia. Gastric Cancer 2016; 19:431-442. [PMID: 26100130 DOI: 10.1007/s10120-015-0510-3] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 06/06/2015] [Indexed: 02/07/2023]
Abstract
PURPOSE It has been reported that lysyl oxidase (LOX) is a hypoxia-responsive factor and is associated with the malignant progression of carcinoma. The aim of this study was to clarify the relationship between the epithelial-mesenchymal transition (EMT) and LOX in gastric cancer cells under hypoxia. METHODS Two gastric cancer cell lines, OCUM-2MD3 and OCUM-12, were used in an in vitro study. The effect of LOX small interfering RNA (siRNA) on the EMT and motility of gastric cancer cells under hypoxic condition was analyzed by reverse transcription PCR, Western blot, a wound-healing assay, and an invasion assay. Correlations between LOX expression and the clinicopathological features of 544 patients with gastric carcinoma were examined immunohistochemically. RESULTS Hypoxic conditions increased the number of polygonal or spindle-shaped cells resulting from EMT in gastric cancer cells. The EMT of cancer cells induced by hypoxia was inhibited by treatment with LOX siRNA. The number of migrating and invading gastric cancer cells in hypoxia was significantly decreased by LOX knockdown. LOX siRNA significantly increased the E-cadherin level and decreased the vimentin level of gastric cancer cells. LOX expression was significantly associated with invasion depth, tumor differentiation, lymph node metastasis, lymphatic invasion, venous invasion, and peritoneal metastasis. Multivariable analysis revealed that LOX was an independent parameter for overall survival. CONCLUSION LOX affects the EMT of gastric cancer cells in hypoxic conditions. LOX expression is a useful prognostic factor for patients with gastric cancer.
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Affiliation(s)
- Hiroaki Kasashima
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Masakazu Yashiro
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan. .,Oncology Institute of Geriatrics and Medical Science, Osaka City University Graduate School of Medicine, Osaka, Japan.
| | - Haruhito Kinoshita
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Tatsunari Fukuoka
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Tamami Morisaki
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Go Masuda
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Katsunobu Sakurai
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Naoshi Kubo
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Masaichi Ohira
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Kosei Hirakawa
- Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
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Gong C, Gu R, Jin H, Sun Y, Li Z, Chen J, Wu G. Lysyl oxidase mediates hypoxia-induced radioresistance in non-small cell lung cancer A549 cells. Exp Biol Med (Maywood) 2015; 241:387-95. [PMID: 26515140 DOI: 10.1177/1535370215609694] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/18/2015] [Indexed: 12/31/2022] Open
Abstract
Hypoxia-induced radioresistance has been well known as the main obstacle in cancer radiotherapy. Lysyl oxidase (LOX) was previously demonstrated to play an important role in hypoxia-induced biological behaviors, such as metastasis and angiogenesis, through hypoxia-inducible factor-1α (HIF-1α), which is an important contributing factor to radioresistance in tumor cells. However, how LOX plays a role in hypoxia-induced radioresistance has yet to be determined. Here, we found that LOX expression was in accordance with HIF-1α expression, and LOX expression at the mRNA and protein level, and enzymatic activity were remarkably upregulated in the hypoxic A549 cells, compared with normoxic A549 cells. Inhibition of LOX resulted in the reduction of the ability to repair double-stranded breaks (DSBs), promotion of apoptosis, relief of G2/M cycle arrest, and eventually reduction of hypoxia-induced radioresistance in the hypoxic A549 cells. This suggests that LOX may play an important role in hypoxia-induced radioresistance. Together, our results might suggest a novel potential therapeutic target in the management of non-small cell lung cancer (NSCLC).
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Affiliation(s)
- Chongwen Gong
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022 Hubei, China
| | - Runxia Gu
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022 Hubei, China Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
| | - Honglin Jin
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022 Hubei, China
| | - Yao Sun
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022 Hubei, China Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, 300000 Tianjin, China
| | - Zhenyu Li
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022 Hubei, China
| | - Jing Chen
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022 Hubei, China
| | - Gang Wu
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022 Hubei, China
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Mesarwi OA, Shin MK, Drager LF, Bevans-Fonti S, Jun JC, Putcha N, Torbenson MS, Pedrosa RP, Lorenzi-Filho G, Steele KE, Schweitzer MA, Magnuson TH, Lidor AO, Schwartz AR, Polotsky VY. Lysyl Oxidase as a Serum Biomarker of Liver Fibrosis in Patients with Severe Obesity and Obstructive Sleep Apnea. Sleep 2015; 38:1583-91. [PMID: 26085300 DOI: 10.5665/sleep.5052] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Indexed: 12/12/2022] Open
Abstract
STUDY OBJECTIVES Obstructive sleep apnea (OSA) is associated with the progression of nonalcoholic fatty liver disease (NAFLD). We hypothesized that the hypoxia of OSA increases hepatic production of lysyl oxidase (LOX), an enzyme that cross-links collagen, and that LOX may serve as a biomarker of hepatic fibrosis. DESIGN Thirty-five patients with severe obesity underwent liver biopsy, polysomnography, and serum LOX testing. A separate group with severe OSA had serum LOX measured before and after 3 mo of CPAP or no therapy, as did age-matched controls. LOX expression and secretion were measured in mouse hepatocytes following exposure to hypoxia. SETTING The Johns Hopkins Bayview Sleep Disorders Center, and the Hypertension Unit of the Heart Institute at the University of São Paulo Medical School. MEASUREMENTS AND RESULTS In the bariatric cohort, the apnea-hypopnea index was higher in patients with hepatic fibrosis than in those without fibrosis (42.7 ± 30.2 events/h, versus 16.2 ± 15.5 events/h; P = 0.002), as was serum LOX (84.64 ± 29.71 ng/mL, versus 45.46 ± 17.16 ng/mL; P < 0.001). In the sleep clinic sample, patients with severe OSA had higher baseline LOX than healthy controls (70.75 ng/mL versus 52.36 ng/mL, P = 0.046), and serum LOX decreased in patients with OSA on CPAP (mean decrease 20.49 ng/mL) but not in untreated patients (mean decrease 0.19 ng/mL). Hypoxic mouse hepatocytes demonstrated 5.9-fold increased LOX transcription (P = 0.046), and enhanced LOX protein secretion. CONCLUSIONS The hypoxic stress of obstructive sleep apnea may increase circulating lysyl oxidase (LOX) levels. LOX may serve as a biomarker of liver fibrosis in patients with severe obesity and nonalcoholic fatty liver disease.
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Affiliation(s)
- Omar A Mesarwi
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Mi-Kyung Shin
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Luciano F Drager
- Hypertension Unit, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Shannon Bevans-Fonti
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jonathan C Jun
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Nirupama Putcha
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | | | - Rodrigo P Pedrosa
- Sleep Laboratory, Pulmonary Division, University of São Paulo Medical School, São Paulo, Brazil
| | - Geraldo Lorenzi-Filho
- Sleep Laboratory, Pulmonary Division, University of São Paulo Medical School, São Paulo, Brazil
| | - Kimberley E Steele
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Michael A Schweitzer
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Thomas H Magnuson
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Anne O Lidor
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Alan R Schwartz
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Vsevolod Y Polotsky
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
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Brustugun OT. Hypoxia as a cause of treatment failure in non-small cell carcinoma of the lung. Semin Radiat Oncol 2014; 25:87-92. [PMID: 25771412 DOI: 10.1016/j.semradonc.2014.11.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Hypoxia is an important factor in tumor biology and is both a predictive and a prognostic factor in non-small cell lung cancer. The negative effect of low oxygenation on radiation therapy effect has been known for decades, but more recent research has emphasized that hypoxia also has a profound effect on a tumor's aggression and metastatic propensity. In this review, current knowledge on both these aspects of treatment failure in NSCLC due to hypoxia has been discussed, along with a presentation of modern methods for hypoxia measurement and current therapeutical interventions to circumvent the negative effect of hypoxia on treatment results.
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Affiliation(s)
- Odd Terje Brustugun
- Department of Oncology, Oslo University Hospital-The Norwegian Radium Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
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Bu M, Li L, Zhang Y, Xu Y, An S, Hou F, Jie X. Lysyl oxidase genetic variants affect gene expression in cervical cancer. DNA Cell Biol 2014; 33:787-92. [PMID: 24945327 DOI: 10.1089/dna.2014.2490] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Lysyl oxidase (LOX) is a copper-dependent amine oxidase that plays important roles in the homeostasis of tumors. The aim of this study was to investigate the association between LOX polymorphisms and cervical cancer, and the effect of these polymorphisms on gene expression. We evaluated two polymorphisms of LOX, rs1800449G/A (G473A) and rs2278226C/G, in 262 cervical cancer cases and 298 healthy controls in the Chinese population. Results showed that the prevalence of rs1800449AA genotype was significantly increased in cases than in controls (p=0.004). Individuals who carried the rs1800449A allele had a 1.56-fold increased risk for cervical cancer than those with the rs1800449G allele (p=0.003). The rs2278226CG genotype also revealed a significantly higher proportion in cases (20.6%) than in controls (7.7%, p<0.001). Interestingly, when analyzing these two polymorphisms with the serum level of LOX, we identified that cervical cancer patients carrying the rs2278226CG genotype had a significantly elevated level of LOX than those with rs2278226CC wild type, whereas the same phenomenon was not observed in controls. The rs1800449 polymorphism did not affect the LOX serum level in either controls or patients. These results suggest that the polymorphisms in the LOX gene may be involved in the development of cervical cancer through various mechanisms.
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Affiliation(s)
- Meimei Bu
- 1 The Maternal and Child Health Hospital of Jinan City , Jinan, Shandong, China
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Ping W, Jiang WY, Chen WS, Sun W, Fu XN. Expression and significance of hypoxia inducible factor-1α and lysyl oxidase in non-small cell lung cancer. Asian Pac J Cancer Prev 2014; 14:3613-8. [PMID: 23886154 DOI: 10.7314/apjcp.2013.14.6.3613] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECT To detect expression of hypoxia inducible factor-1α (HIF-1α) and lysyl oxidase (LOX) in non-small cell lung cancer (NSCLC) and explore their roles in prognosis. METHODS The mRNA levels of HIF-1α and LOX were investigated by real-time reverse-transcriptase polymerase chain reaction in 40 cases of tumour and paired normal tissues. In addition, protein expression of HIF-1α and LOX was examined by immunohistochemistry in 82 cases of tumour and 45 paired normal tissues. The relationship between HIF-1α or LOX and clinicopathologic characteristics, as well as the correlation between HIF-1α and LOX, were also examined. Kaplan-Meier survival curves and the log-rank test were used to analyze progression-free survival. RESULTS HIF-1α or LOX mRNA levels in tumor tissues was significantly higher than those in paired normal tissues (p<0.01). Positive HIF-1α or LOX protein expression in tumor tissues was noted in 46/82 (56.1%) and 49/82 (59.8%) of the cases, respectively, being significantly higher than those in paired normal tissues (p<0.05). There was significant correlation between the expression of HIF-1α or LOX and tumor size, lymph node metastasis and pathological stage (p<0.05). The expression of HIF-1α and LOX had a significant inverse impact on survival of patients with NSCLC. CONCLUSION HIF-1α and LOX may play a pivotal role in the development of NSCLC, and may act in synergy to promote the progression of NSCLC.
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Affiliation(s)
- Wei Ping
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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The role of the tumor-microenvironment in lung cancer-metastasis and its relationship to potential therapeutic targets. Cancer Treat Rev 2013; 40:558-66. [PMID: 24176790 DOI: 10.1016/j.ctrv.2013.10.001] [Citation(s) in RCA: 312] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 10/06/2013] [Indexed: 12/14/2022]
Abstract
Non-small cell lung cancer (NSCLC) accounts for >80% of lung cancer cases and currently has an overall five-year survival rate of only 15%. Patients presenting with advanced stage NSCLC die within 18-months of diagnosis. Metastatic spread accounts for >70% of these deaths. Thus elucidation of the mechanistic basis of NSCLC-metastasis has potential to impact on patient quality of life and survival. Research on NSCLC metastasis has recently expanded to include non-cancer cell components of tumors-the stromal cellular compartment and extra-cellular matrix components comprising the tumor-microenvironment. Metastasis (from initial primary tumor growth through angiogenesis, intravasation, survival in the bloodstream, extravasation and metastatic growth) is an inefficient process and few released cancer cells complete the entire process. Micro-environmental interactions assist each of these steps and discovery of the mechanisms by which tumor cells co-operate with the micro-environment are uncovering key molecules providing either biomarkers or potential drug targets. The major sites of NSCLC metastasis are brain, bone, adrenal gland and the liver. The mechanistic basis of this tissue-tropism is beginning to be elucidated offering the potential to target stromal components of these tissues thus targeting therapy to the tissues affected. This review covers the principal steps involved in tumor metastasis. The role of cell-cell interactions, ECM remodeling and autocrine/paracrine signaling interactions between tumor cells and the surrounding stroma is discussed. The mechanistic basis of lung cancer metastasis to specific organs is also described. The signaling mechanisms outlined have potential to act as future drug targets minimizing lung cancer metastatic spread and morbidity.
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