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Tomuleasa C, Tigu AB, Munteanu R, Moldovan CS, Kegyes D, Onaciu A, Gulei D, Ghiaur G, Einsele H, Croce CM. Therapeutic advances of targeting receptor tyrosine kinases in cancer. Signal Transduct Target Ther 2024; 9:201. [PMID: 39138146 PMCID: PMC11323831 DOI: 10.1038/s41392-024-01899-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 05/29/2024] [Accepted: 06/14/2024] [Indexed: 08/15/2024] Open
Abstract
Receptor tyrosine kinases (RTKs), a category of transmembrane receptors, have gained significant clinical attention in oncology due to their central role in cancer pathogenesis. Genetic alterations, including mutations, amplifications, and overexpression of certain RTKs, are critical in creating environments conducive to tumor development. Following their discovery, extensive research has revealed how RTK dysregulation contributes to oncogenesis, with many cancer subtypes showing dependency on aberrant RTK signaling for their proliferation, survival and progression. These findings paved the way for targeted therapies that aim to inhibit crucial biological pathways in cancer. As a result, RTKs have emerged as primary targets in anticancer therapeutic development. Over the past two decades, this has led to the synthesis and clinical validation of numerous small molecule tyrosine kinase inhibitors (TKIs), now effectively utilized in treating various cancer types. In this manuscript we aim to provide a comprehensive understanding of the RTKs in the context of cancer. We explored the various alterations and overexpression of specific receptors across different malignancies, with special attention dedicated to the examination of current RTK inhibitors, highlighting their role as potential targeted therapies. By integrating the latest research findings and clinical evidence, we seek to elucidate the pivotal role of RTKs in cancer biology and the therapeutic efficacy of RTK inhibition with promising treatment outcomes.
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Affiliation(s)
- Ciprian Tomuleasa
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.
- Department of Hematology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj Napoca, Romania.
- Department of Hematology, Ion Chiricuta Clinical Cancer Center, Cluj Napoca, Romania.
- Academy of Romanian Scientists, Ilfov 3, 050044, Bucharest, Romania.
| | - Adrian-Bogdan Tigu
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Academy of Romanian Scientists, Ilfov 3, 050044, Bucharest, Romania
| | - Raluca Munteanu
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Department of Hematology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj Napoca, Romania
- Academy of Romanian Scientists, Ilfov 3, 050044, Bucharest, Romania
| | - Cristian-Silviu Moldovan
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - David Kegyes
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Department of Hematology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj Napoca, Romania
- Academy of Romanian Scientists, Ilfov 3, 050044, Bucharest, Romania
| | - Anca Onaciu
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Diana Gulei
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Gabriel Ghiaur
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Department of Hematology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj Napoca, Romania
- Department of Leukemia, Sidney Kimmel Cancer Center at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Hermann Einsele
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Department of Hematology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj Napoca, Romania
- Universitätsklinikum Würzburg, Medizinische Klinik II, Würzburg, Germany
| | - Carlo M Croce
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA.
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Chatzikalil E, Stergiou IE, Papadakos SP, Konstantinidis I, Theocharis S. The Clinical Relevance of the EPH/Ephrin Signaling Pathway in Pediatric Solid and Hematologic Malignancies. Int J Mol Sci 2024; 25:3834. [PMID: 38612645 PMCID: PMC11011407 DOI: 10.3390/ijms25073834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/26/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
Pediatric neoplasms represent a complex group of malignancies that pose unique challenges in terms of diagnosis, treatment, and understanding of the underlying molecular pathogenetic mechanisms. Erythropoietin-producing hepatocellular receptors (EPHs), the largest family of receptor tyrosine kinases and their membrane-tethered ligands, ephrins, orchestrate short-distance cell-cell signaling and are intricately involved in cell-pattern morphogenesis and various developmental processes. Unraveling the role of the EPH/ephrin signaling pathway in the pathophysiology of pediatric neoplasms and its clinical implications can contribute to deciphering the intricate landscape of these malignancies. The bidirectional nature of the EPH/ephrin axis is underscored by emerging evidence revealing its capacity to drive tumorigenesis, fostering cell-cell communication within the tumor microenvironment. In the context of carcinogenesis, the EPH/ephrin signaling pathway prompts a reevaluation of treatment strategies, particularly in pediatric oncology, where the modest progress in survival rates and enduring treatment toxicity necessitate novel approaches. Molecularly targeted agents have emerged as promising alternatives, prompting a shift in focus. Through a nuanced understanding of the pathway's intricacies, we aim to lay the groundwork for personalized diagnostic and therapeutic strategies, ultimately contributing to improved outcomes for young patients grappling with neoplastic challenges.
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Affiliation(s)
- Elena Chatzikalil
- Division of Pediatric Hematology-Oncology, First Department of Pediatrics, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | - Ioanna E. Stergiou
- Department of Pathophysiology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | - Stavros P. Papadakos
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | | | - Stamatios Theocharis
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece;
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Mekala S, Dugam P, Das A. Ephrin-Eph receptor tyrosine kinases for potential therapeutics against hepatic pathologies. J Cell Commun Signal 2023; 17:549-561. [PMID: 37103689 PMCID: PMC10409970 DOI: 10.1007/s12079-023-00750-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 04/14/2023] [Indexed: 04/28/2023] Open
Abstract
Hepatic fibrosis is the common pathological change that occurs due to increased synthesis and accumulation of extracellular matrix components. Chronic insult from hepatotoxicants leads to liver cirrhosis, which if not reversed timely using appropriate therapeutics, liver transplantation remains the only effective therapy. Often the disease further progresses into hepatic carcinoma. Although there is an increased advancement in understanding the pathological phenotypes of the disease, additional knowledge of the novel molecular signaling mechanisms involved in the disease progression would enable the development of efficacious therapeutics. Ephrin-Eph molecules belong to the largest family of receptor tyrosine kinases (RTKs) which are identified to play a crucial role in cellular migratory functions, during morphological and developmental stages. Additionally, they contribute to the growth of a multicellular organism as well as in pathological conditions like cancer, and diabetes. A wide spectrum of mechanistic studies has been performed on ephrin-Eph RTKs in various hepatic tissues under both normal and diseased conditions revealing their diverse roles in hepatic pathology. This systematic review summarizes the liver-specific ephrin-Eph RTK signaling mechanisms and recognizes them as druggable targets for mitigating hepatic pathology.
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Affiliation(s)
- Sowmya Mekala
- Department of Applied Biology, Council of Scientific and Industrial Research-Indian Institute of Chemical Technology (CSIR-IICT), Uppal Road, Tarnaka, Hyderabad, TS, 500 007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, UP, 201 002, India
| | - Prachi Dugam
- Department of Applied Biology, Council of Scientific and Industrial Research-Indian Institute of Chemical Technology (CSIR-IICT), Uppal Road, Tarnaka, Hyderabad, TS, 500 007, India
| | - Amitava Das
- Department of Applied Biology, Council of Scientific and Industrial Research-Indian Institute of Chemical Technology (CSIR-IICT), Uppal Road, Tarnaka, Hyderabad, TS, 500 007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, UP, 201 002, India.
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Stergiou IE, Papadakos SP, Karyda A, Tsitsilonis OE, Dimopoulos MA, Theocharis S. EPH/Ephrin Signaling in Normal Hematopoiesis and Hematologic Malignancies: Deciphering Their Intricate Role and Unraveling Possible New Therapeutic Targets. Cancers (Basel) 2023; 15:3963. [PMID: 37568780 PMCID: PMC10417178 DOI: 10.3390/cancers15153963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023] Open
Abstract
Erythropoietin-producing hepatocellular carcinoma receptors (EPHs) represent the largest family of receptor tyrosine kinases (RTKs). EPH interaction with ephrins, their membrane-bound ligands, holds a pivotal role in embryonic development, while, though less active, it is also implicated in various physiological functions during adult life. In normal hematopoiesis, different patterns of EPH/ephrin expression have been correlated with hematopoietic stem cell (HSC) maintenance and lineage-committed hematopoietic progenitor cell (HPC) differentiation, as well as with the functional properties of their mature offspring. Research in the field of hematologic malignancies has unveiled a rather complex involvement of the EPH/ephrinsignaling pathway in the pathophysiology of these neoplasms. Aberrations in genetic, epigenetic, and protein levels have been identified as possible players implicated both in tumor progression and suppression, while correlations have also been highlighted regarding prognosis and response to treatment. Initial efforts to therapeutically target the EPH/ephrin axis have been undertaken in the setting of hematologic neoplasia but are mainly confined to the preclinical level. To this end, deciphering the complexity of this signaling pathway both in normal and malignant hematopoiesis is necessary.
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Affiliation(s)
- Ioanna E. Stergiou
- Department of Pathophysiology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | - Stavros P. Papadakos
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece; (S.P.P.); (A.K.)
| | - Anna Karyda
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece; (S.P.P.); (A.K.)
| | - Ourania E. Tsitsilonis
- Flow Cytometry Unit, Department of Biology, School of Science, National and Kapodistrian University of Athens, 15784 Athens, Greece;
| | - Meletios-Athanasios Dimopoulos
- Department of Clinical Therapeutics, School of Medicine, National and Kapodistrian University of Athens, Alexandra Hospital, 11528 Athens, Greece
| | - Stamatios Theocharis
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece; (S.P.P.); (A.K.)
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The EPH/Ephrin System in Pancreatic Ductal Adenocarcinoma (PDAC): From Pathogenesis to Treatment. Int J Mol Sci 2023; 24:ijms24033015. [PMID: 36769332 PMCID: PMC9917762 DOI: 10.3390/ijms24033015] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/09/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a major concern for health care systems worldwide, since its mortality remains unaltered despite the surge in cutting-edge science. The EPH/ephrin signaling system was first investigated in the 1980s. EPH/ephrins have been shown to exert bidirectional signaling and cell-to-cell communication, influencing cellular morphology, adhesion, migration and invasion. Recent studies have highlighted the critical role of the EPH/ephrin system in various physiologic processes, including cellular proliferation, survival, synaptic plasticity and angiogenesis. Thus, it has become evident that the EPH/ephrin signaling system may have compelling effects on cell homeostasis that contribute to carcinogenesis. In particular, the EPH/ephrins have an impact on pancreatic morphogenesis and development, whereas several EPHs and ephrins are altered in PDAC. Several clinical and preclinical studies have attempted to elucidate the effects of the EPH/ephrin pathway, with multilayered effects on PDAC development. These studies have highlighted its highly promising role in the diagnosis, prognosis and therapeutic management of PDAC. The aim of this review is to explore the obscure aspects of the EPH/ephrin system concerning the development, physiology and homeostasis of the pancreas.
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Eph Receptors in Cancer. Biomedicines 2023; 11:biomedicines11020315. [PMID: 36830852 PMCID: PMC9953285 DOI: 10.3390/biomedicines11020315] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/13/2023] [Accepted: 01/20/2023] [Indexed: 01/24/2023] Open
Abstract
Eph receptor tyrosine kinases play critical functions during development, in the formation of tissue and organ borders, and the vascular and neural systems. Uniquely among tyrosine kinases, their activities are controlled by binding to membrane-bound ligands, called ephrins. Ephs and ephrins generally have a low expression in adults, functioning mainly in tissue homeostasis and plasticity, but are often overexpressed in cancers, where they are especially associated with undifferentiated or progenitor cells, and with tumour development, vasculature, and invasion. Mutations in Eph receptors also occur in various tumour types and are suspected to promote tumourigenesis. Ephs and ephrins have the capacity to operate as both tumour promoters and tumour suppressors, depending on the circumstances. They have been demonstrated to impact tumour cell proliferation, migration, and invasion in vitro, as well as tumour development, angiogenesis, and metastases in vivo, making them potential therapeutic targets. However, successful development of therapies will require detailed understanding of the opposing roles of Ephs in various cancers. In this review, we discuss the variations in Eph expression and functions in a variety of malignancies. We also describe the multiple strategies that are currently available to target them in tumours, including preclinical and clinical development.
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De Palma FDE, Carbonnier V, Salvatore F, Kroemer G, Pol JG, Maiuri MC. Systematic Investigation of the Diagnostic and Prognostic Impact of LINC01087 in Human Cancers. Cancers (Basel) 2022; 14:cancers14235980. [PMID: 36497462 PMCID: PMC9738797 DOI: 10.3390/cancers14235980] [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: 09/27/2022] [Revised: 11/22/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
(1) Background: Long non-coding RNAs may constitute epigenetic biomarkers for the diagnosis, prognosis, and therapeutic response of a variety of tumors. In this context, we aimed at assessing the diagnostic and prognostic value of the recently described long intergenic non-coding RNA 01087 (LINC01087) in human cancers. (2) Methods: We studied the expression of LINC01087 across 30 oncological indications by interrogating public resources. Data extracted from the TCGA and GTEx databases were exploited to plot receiver operating characteristic curves (ROC) and determine the diagnostic performance of LINC01087. Survival data from TCGA and KM-Plotter directories allowed us to graph Kaplan-Meier curves and evaluate the prognostic value of LINC01087. To investigate the function of LINC01087, gene ontology (GO) annotation and Kyoto Encyclopedia of Gene and Genomes (KEGG) enrichment analyses were performed. Furthermore, interactions between LINC01087 and both miRNA and mRNA were studied by means of bioinformatics tools. (3) Results: LINC01087 was significantly deregulated in 7 out of 30 cancers, showing a predominant upregulation. Notably, it was overexpressed in breast (BC), esophageal (ESCA), and ovarian (OV) cancers, as well as lung squamous cell carcinoma (LUSC), stomach adenocarcinoma (STAD), and uterine carcinosarcoma (UCS). By contrast, LINC01087 displayed downregulation in testicular germ cell tumors (TGCT). ROC curve analyses identified LINC01087 as a potential diagnostic indicator in BC, ESCA, OV, STAD, and TGCT. Moreover, high and low expression of LINC01087 predicted a favorable prognosis in BC and papillary cell carcinoma, respectively. In silico analyses indicated that deregulation of LINC01087 in cancer was associated with a modulation of genes related to ion channel, transporter, and peptide receptor activity. (4) Conclusions: the quantification of an altered abundance of LINC01087 in tissue specimens might be clinically useful for the diagnosis and prognosis of some hormone-related tumors, including BC, OV, and TGCT, as well as other cancer types such as ESCA and STAD. Moreover, our study revealed the potential of LINC01087 (and perhaps other lncRNAs) to regulate neuroactive molecules in cancer.
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Affiliation(s)
- Fatima Domenica Elisa De Palma
- Department of Molecular Medicine and Medical Biotechnologies, University of Napoli Federico II, 80131 Napoli, Italy
- CEINGE-Biotecnologie Avanzate Franco Salvatore, 80145 Napoli, Italy
- Équipe Labellisée par la Ligue Contre le Cancer, Centre de Recherche des Cordeliers, Inserm U1138, Université Paris Cité, Sorbonne Université, Institut Universitaire de France, 75005 Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805 Villejuif, France
| | - Vincent Carbonnier
- Équipe Labellisée par la Ligue Contre le Cancer, Centre de Recherche des Cordeliers, Inserm U1138, Université Paris Cité, Sorbonne Université, Institut Universitaire de France, 75005 Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805 Villejuif, France
| | - Francesco Salvatore
- CEINGE-Biotecnologie Avanzate Franco Salvatore, 80145 Napoli, Italy
- Centro Interuniversitario per Malattie Multigeniche e Multifattoriali e Loro Modelli Animali (Federico II, 80131, Napoli, Tor Vergata, Rome and “G. D’Annunzio”, Chieti-Pescara), 80131 Napoli, Italy
| | - Guido Kroemer
- Équipe Labellisée par la Ligue Contre le Cancer, Centre de Recherche des Cordeliers, Inserm U1138, Université Paris Cité, Sorbonne Université, Institut Universitaire de France, 75005 Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805 Villejuif, France
- Department of Biology, Institut du Cancer Paris CARPEM, Hôpital Européen Georges Pompidou, 75004 Paris, France
| | - Jonathan G. Pol
- Équipe Labellisée par la Ligue Contre le Cancer, Centre de Recherche des Cordeliers, Inserm U1138, Université Paris Cité, Sorbonne Université, Institut Universitaire de France, 75005 Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805 Villejuif, France
- Correspondence: (J.G.P.); (M.C.M.)
| | - Maria Chiara Maiuri
- Department of Molecular Medicine and Medical Biotechnologies, University of Napoli Federico II, 80131 Napoli, Italy
- Équipe Labellisée par la Ligue Contre le Cancer, Centre de Recherche des Cordeliers, Inserm U1138, Université Paris Cité, Sorbonne Université, Institut Universitaire de France, 75005 Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805 Villejuif, France
- Correspondence: (J.G.P.); (M.C.M.)
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Chen X, Yu D, Zhou H, Zhang X, Hu Y, Zhang R, Gao X, Lin M, Guo T, Zhang K. The role of EphA7 in different tumors. Clin Transl Oncol 2022; 24:1274-1289. [PMID: 35112312 DOI: 10.1007/s12094-022-02783-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 01/18/2022] [Indexed: 12/06/2022]
Abstract
Ephrin receptor A7 (EphA7) is a member of the Eph receptor family. It is widely involved in signal transduction between cells, regulates cell proliferation and differentiation, and participates in developing neural tubes and brain. In addition, EphA7 also has a dual role of tumor promoter and tumor suppressor. It can participate in cell proliferation, migration and apoptosis through various mechanisms, and affect tumor differentiation, staging and prognosis. EphA7 may be a potential diagnostic marker and tumor treatment target. This article reviews the effects of EphA7 on a variety of tumor biological processes and pathological characteristics, as well as specific effects and regulatory mechanisms.
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Affiliation(s)
- Xiangyi Chen
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Dechen Yu
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Haiyu Zhou
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China. .,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China. .,Xigu District People's Hospital, Lanzhou, 730030, China.
| | - Xiaobo Zhang
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Yicun Hu
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Ruihao Zhang
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Xidan Gao
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Maoqiang Lin
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Taowen Guo
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
| | - Kun Zhang
- Department of Orthopedics, Lanzhou University Second Hospital, 82 Cuiying Men, Lanzhou, 730030, China.,Gansu Key Laboratory of Bone and Joint Diseases, Lanzhou, 730030, China.,Xigu District People's Hospital, Lanzhou, 730030, China
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Neoadjuvant therapy alters the collagen architecture of pancreatic cancer tissue via Ephrin-A5. Br J Cancer 2022; 126:628-639. [PMID: 34824448 PMCID: PMC8854423 DOI: 10.1038/s41416-021-01639-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/26/2021] [Accepted: 11/10/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The treatment of pancreatic cancer (PDAC) remains clinically challenging, and neoadjuvant therapy (NAT) offers down staging and improved surgical resectability. Abundant fibrous stroma is involved in malignant characteristic of PDAC. We aimed to investigate tissue remodelling, particularly the alteration of the collagen architecture of the PDAC microenvironment by NAT. METHODS We analysed the alteration of collagen and gene expression profiles in PDAC tissues after NAT. Additionally, we examined the biological role of Ephrin-A5 using primary cultured cancer-associated fibroblasts (CAFs). RESULTS The expression of type I, III, IV, and V collagen was reduced in PDAC tissues after effective NAT. The bioinformatics approach provided comprehensive insights into NAT-induced matrix remodelling, which showed Ephrin-A signalling as a likely pathway and Ephrin-A5 (encoded by EFNA5) as a crucial ligand. Effective NAT reduced the number of Ephrin-A5+ cells, which were mainly CAFs; this inversely correlated with the clinical tumour shrinkage rate. Experimental exposure to radiation and chemotherapeutic agents suppressed proliferation, EFNA5 expression, and collagen synthesis in CAFs. Forced EFNA5 expression altered CAF collagen gene profiles similar to those found in PDAC tissues after NAT. CONCLUSION These results suggest that effective NAT changes the extracellular matrix with collagen profiles through CAFs and their Ephrin-A5 expression.
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Nikas I, Giaginis C, Petrouska K, Alexandrou P, Michail A, Sarantis P, Tsourouflis G, Danas E, Pergaris A, Politis PK, Nakopoulou L, Theocharis S. EPHA2, EPHA4, and EPHA7 Expression in Triple-Negative Breast Cancer. Diagnostics (Basel) 2022; 12:diagnostics12020366. [PMID: 35204461 PMCID: PMC8871500 DOI: 10.3390/diagnostics12020366] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 01/21/2022] [Accepted: 01/28/2022] [Indexed: 02/04/2023] Open
Abstract
Ongoing research continues to elucidate the complex role of ephrin receptors (EPHs) and their ligands (ephrins) in breast cancer pathogenesis, with their varying expression patterns implied to have an important impact on patients’ outcome. The current study aims to investigate the clinical significance of EPHA2, EPHA4, and EPHA7 expression in triple-negative breast cancer (TNBC) cases. EPHA2, EPHA4, and EPHA7 protein expression was assessed immunohistochemically on formalin-fixed and paraffin-embedded (FFPE) TNBC tissue sections from 52 TNBC patients and correlated with key clinicopathologic parameters and patients’ survival data (overall survival (OS); disease-free survival (DFS)). EPHA2, EPHA4, and EPHA7 expression was further examined in TNBC cell lines. EPHA2 overexpression was observed in 26 (50%) of the TNBC cases, who exhibited a shorter OS and DFS than their low-expression counterparts, with EPHA2 representing an independent prognostic factor for OS and DFS (p = 0.0041 and p = 0.0232, respectively). EPHA4 overexpression was associated with lymph node metastasis in TNBC patients (p = 0.0546). Alterations in EPHA2, EPHA4, and EPHA7 expression levels were also noted in the examined TNBC cell lines. Our study stresses that EPHA2 expression constitutes a potential prognostic factor for TNBC patients. Given the limited treatment options and poorer outcome that accompany the TNBC subtype, EPHA2 could also pose as a target for novel, more personalized, and effective therapeutic approaches for those patients.
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Affiliation(s)
- Ilias Nikas
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
- School of Medicine, European University Cyprus, Nicosia 2404, Cyprus
| | - Constantinos Giaginis
- Department of Food Science and Nutrition, School of Environment, University of Aegean, Myrina, 811 00 Lemnos, Greece;
| | - Kalliopi Petrouska
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
| | - Paraskevi Alexandrou
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
| | - Artemis Michail
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str., 115 27 Athens, Greece; (A.M.); (P.K.P.)
| | - Panagiotis Sarantis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
| | - Gerasimos Tsourouflis
- Second Department of Propedeutic Surgery, Laikon Hospital, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece;
| | - Eugene Danas
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
| | - Alexandros Pergaris
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
| | - Panagiotis K. Politis
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str., 115 27 Athens, Greece; (A.M.); (P.K.P.)
| | - Lydia Nakopoulou
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
| | - Stamatios Theocharis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (I.N.); (K.P.); (P.A.); (P.S.); (E.D.); (A.P.); (L.N.)
- Correspondence: ; Tel.: + 30-210-7462178; Fax: + 30-210-7456259
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11
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Yao LC, Jiang XH, Yan SS, Wang W, Wu L, Zhai LL, Xiang F, Ji T, Ye L, Tang ZG. Four potential microRNAs affect the progression of pancreatic ductal adenocarcinoma by targeting MET via the PI3K/AKT signaling pathway. Oncol Lett 2021; 21:326. [PMID: 33692858 PMCID: PMC7933770 DOI: 10.3892/ol.2021.12588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 12/23/2020] [Indexed: 12/12/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is the most common tumor subtype of pancreatic cancer, which exhibits poor patient prognosis due to the lack of effective biomarkers in the diagnosis and treatment. The present study aimed to identify the potential biomarkers of PDAC carcinogenesis and progression using three microarray datasets, GSE15471, GSE16515 and GSE28735, which were downloaded from the Gene Expression Omnibus database. The datasets were analyzed to screen out differentially expressed genes (DEGs) in PDAC tissues and adjacent normal tissues. A total of 143 DEGs were identified, including 132 upregulated genes and 11 downregulated genes. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes functional and signaling pathway enrichment analyses were performed on the DEGs, and the Search Tool for the Retrieval of Interacting Genes/Proteins database was used to construct a protein-protein interaction network. The main functions of DEGs include extracellular matrix degradation, and regulation of matrix metalloproteinase activity and the PI3K-Akt signaling pathway. The five hub genes were subsequently screened using Cytoscape software, and survival analysis demonstrated that abnormal expression levels of the hub genes was associated with poor disease-free survival and overall survival. Biological experiments were performed to confirm whether mesenchymal-to-epithelial transition (MET) factors promote the proliferation, migration and invasion of PDAC cells via the PI3K/AKT signaling pathway. In addition, six MET-targeted microRNAs (miRNAs) were identified, four of which had conserved binding sites with MET. Based on the signaling pathway enrichment analysis of these miRNAs, it is suggested that they can affect the progression of PDAC by targeting MET via the PI3K/AKT signaling pathway. In conclusion, the hub genes and miRNAs that were identified in the present study contribute to the molecular mechanisms of PDAC carcinogenesis and progression. They also provide candidate biomarkers for early diagnosis and treatment of patients with PDAC.
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Affiliation(s)
- Li-Chao Yao
- Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Xiu-Hua Jiang
- Department of Geriatrics, General Hospital of Central Theater Command, Wuhan, Hubei 430071, P.R. China
| | - Si-Si Yan
- Reproductive Medical Center, Renmin Hospital of Wuhan University and Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Wei Wang
- Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Lun Wu
- Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Lu-Lu Zhai
- Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Feng Xiang
- Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Tao Ji
- Department of Cardiothoracic Surgery, General Hospital of Central Theater Command, Wuhan, Hubei 430071, P.R. China
| | - Lin Ye
- Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Zhi-Gang Tang
- Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, P.R. China
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12
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Creeden JF, Alganem K, Imami AS, Henkel ND, Brunicardi FC, Liu SH, Shukla R, Tomar T, Naji F, McCullumsmith RE. Emerging Kinase Therapeutic Targets in Pancreatic Ductal Adenocarcinoma and Pancreatic Cancer Desmoplasia. Int J Mol Sci 2020; 21:ijms21228823. [PMID: 33233470 PMCID: PMC7700673 DOI: 10.3390/ijms21228823] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/16/2020] [Accepted: 11/19/2020] [Indexed: 02/08/2023] Open
Abstract
Kinase drug discovery represents an active area of therapeutic research, with previous pharmaceutical success improving patient outcomes across a wide variety of human diseases. In pancreatic ductal adenocarcinoma (PDAC), innovative pharmaceutical strategies such as kinase targeting have been unable to appreciably increase patient survival. This may be due, in part, to unchecked desmoplastic reactions to pancreatic tumors. Desmoplastic stroma enhances tumor development and progression while simultaneously restricting drug delivery to the tumor cells it protects. Emerging evidence indicates that many of the pathologic fibrotic processes directly or indirectly supporting desmoplasia may be driven by targetable protein tyrosine kinases such as Fyn-related kinase (FRK); B lymphoid kinase (BLK); hemopoietic cell kinase (HCK); ABL proto-oncogene 2 kinase (ABL2); discoidin domain receptor 1 kinase (DDR1); Lck/Yes-related novel kinase (LYN); ephrin receptor A8 kinase (EPHA8); FYN proto-oncogene kinase (FYN); lymphocyte cell-specific kinase (LCK); tec protein kinase (TEC). Herein, we review literature related to these kinases and posit signaling networks, mechanisms, and biochemical relationships by which this group may contribute to PDAC tumor growth and desmoplasia.
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Affiliation(s)
- Justin F. Creeden
- Department of Neurosciences, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (K.A.); (A.S.I.); (N.D.H.); (R.S.); (R.E.M.)
- Department of Cancer Biology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (F.C.B.); (S.-H.L.)
- Department of Surgery, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 6038, USA
- Correspondence: ; Tel.: +1-419-383-6474
| | - Khaled Alganem
- Department of Neurosciences, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (K.A.); (A.S.I.); (N.D.H.); (R.S.); (R.E.M.)
| | - Ali S. Imami
- Department of Neurosciences, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (K.A.); (A.S.I.); (N.D.H.); (R.S.); (R.E.M.)
| | - Nicholas D. Henkel
- Department of Neurosciences, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (K.A.); (A.S.I.); (N.D.H.); (R.S.); (R.E.M.)
| | - F. Charles Brunicardi
- Department of Cancer Biology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (F.C.B.); (S.-H.L.)
- Department of Surgery, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 6038, USA
| | - Shi-He Liu
- Department of Cancer Biology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (F.C.B.); (S.-H.L.)
- Department of Surgery, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 6038, USA
| | - Rammohan Shukla
- Department of Neurosciences, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (K.A.); (A.S.I.); (N.D.H.); (R.S.); (R.E.M.)
| | - Tushar Tomar
- PamGene International BV, 5200 BJ’s-Hertogenbosch, The Netherlands; (T.T.); (F.N.)
| | - Faris Naji
- PamGene International BV, 5200 BJ’s-Hertogenbosch, The Netherlands; (T.T.); (F.N.)
| | - Robert E. McCullumsmith
- Department of Neurosciences, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA; (K.A.); (A.S.I.); (N.D.H.); (R.S.); (R.E.M.)
- Neurosciences Institute, ProMedica, Toledo, OH 6038, USA
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13
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Zhang R, Han D, Li L, Luo W, Liu J, Qian L. EphA5 Silencing Increases the Radiosensitivity of ESCC Cells Through ATM-Dependent Pathway. Cancer Manag Res 2020; 12:9539-9549. [PMID: 33061640 PMCID: PMC7537809 DOI: 10.2147/cmar.s261182] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 07/23/2020] [Indexed: 12/24/2022] Open
Abstract
Background Radiotherapy is one of the most important treatments for esophageal squamous cell carcinoma (ESCC). Previously, we found that EphA5 expression was increased in ESCC cells and tumor tissues. Studies from other groups reported that EphA5 is abnormally expressed in numerous malignant tumors and may be involved in the radiosensitivity of lung cancer. However, the role of EphA5 in radiotherapy for ESCC remains unclear. Methods The siRNA sequences against human EPHA5 were transfected to the ESCC cells (KYSE150 and KYSE450). After ionizing radiation (IR), cell viability and colony formation assays were used to test the changes of cell proliferation in EphA5-silenced cells. Flow cytometry analysis was performed to investigate the cell apoptosis and cycle in the irradiated cells interfered by siRNA. The key molecules involved in cell cycle checkpoints and DNA damage repair were evaluated by Western blot and immunofluorescence. Results CCK8 assay and clonogenic assay showed that the proliferation of EphA5-silenced ESCC cells was inhibited after IR. At 24 h post-IR treatment, we found that the G1/S checkpoint triggered by DNA damage in EphA5-silenced cells was defective. γ-H2AX foci in the irradiated EphA5-silenced cells were impaired at 0.5 h post-IR treatment as well as ATM activation. The defective activation of ATM resulted in a decrease of p-Chk2, p-p53 and p21 expression. Conclusion In conclusion, these results indicate that EphA5 silencing increases radiosensitivity in ESCC cells through ATM-dependent pathway, which provides a potential target for the radiotherapy in ESCC.
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Affiliation(s)
- Rui Zhang
- Department of Oncology, QingPu Branch of Zhongshan Hospital Affiliated to Fudan University, Shanghai 201799, People's Republic of China
| | - Dan Han
- Division of Life Science and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, People's Republic of China
| | - Lu Li
- Division of Life Science and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, People's Republic of China
| | - Wenguang Luo
- Department of Radiation Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, People's Republic of China
| | - Jing Liu
- Department of Pathology, Qing Pu Branch of Zhongshan Hospital Affiliated to Fudan University, Shanghai 201799, People's Republic of China
| | - Liting Qian
- Department of Radiation Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, People's Republic of China
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14
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Ephrin Receptors (Eph): EphA1, EphA5, and EphA7 Expression in Uveal Melanoma-Associations with Clinical Parameters and Patient Survival. Life (Basel) 2020; 10:life10100225. [PMID: 33007931 PMCID: PMC7601896 DOI: 10.3390/life10100225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 09/27/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022] Open
Abstract
Uveal melanoma is the most common primary intraocular malignancy in adults. The development of distant metastases is associated with a poor prognosis. Ephrine receptors (Eph) are the largest subpopulation of tyrosine kinase receptors. They play an important role in processes related to the formation and progression of cancer. The aim of the study was to evaluate the expression of ephrin receptors EphA1, EphA5, and EphA7 in uveal melanoma and its associations with clinicopathological parameters, overall survival, and disease-free survival. The study included 94 previously untreated patients who underwent enucleation due to uveal melanoma. High expression of EphA1 was positively correlated with a smaller tumor size, less frequent extra-scleral extension, lower mitotic activity, and more frequent vitreous hemorrhage. High expression of EphA5 was associated with less frequent chromosome 3 loss, absence of distant metastases, and more frequent vitreous hemorrhage. High expression of EphA7 was associated with a more frequent primary tumor location in the posterior pole. High EphA5 expression was associated with longer overall survival time. The above findings indicate that high expression of EphA1 and EphA5 can be considered a beneficial prognostic factor in uveal melanoma.
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15
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Buckens OJ, El Hassouni B, Giovannetti E, Peters GJ. The role of Eph receptors in cancer and how to target them: novel approaches in cancer treatment. Expert Opin Investig Drugs 2020; 29:567-582. [PMID: 32348169 DOI: 10.1080/13543784.2020.1762566] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Erythropoietin-producing human hepatocellular (Eph) receptors are among the largest family of tyrosine kinases that are divided into two classes: EphA and EphB receptors. Over the past two decades, their role in cancer has become more evident. AREAS COVERED There is a need for new anticancer treatments and more insight in the emerging role of Eph receptors in cancer. Molecular mechanisms underlying the pro-tumorigenic effects of Eph receptors could be exploited for future therapeutic strategies. This review describes the variability in expression levels and different effects on oncogenic and tumor suppressive downstream signaling of Eph receptors in various cancer types, and the small molecules, antibodies and peptides that target these receptors. EXPERT OPINION The complexity of Eph signaling is a challenge for the definition of clear targets for cancer treatment. Nevertheless, numerous drugs that target EphA2 and EphB4 are currently in clinical trials. However, some Eph targeted drugs also inhibit other tyrosine kinases, so it is unclear to what extent the targeting of Eph receptors contributes to their efficacy. Future research is warranted for an improved understanding of the full network in which Eph receptors function. This will be critical for the improvement of the anticancer effects of drugs that target the Eph receptors.
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Affiliation(s)
- Oscar J Buckens
- Amsterdam University College , Amsterdam, The Netherlands.,Laboratory Medical Oncology, Amsterdam UMC Location VUMC, CCA , Amsterdam, The Netherlands
| | - Btissame El Hassouni
- Laboratory Medical Oncology, Amsterdam UMC Location VUMC, CCA , Amsterdam, The Netherlands
| | - Elisa Giovannetti
- Laboratory Medical Oncology, Amsterdam UMC Location VUMC, CCA , Amsterdam, The Netherlands.,Pharmacology Lab, AIRC Start up Unit, Fondazione Pisana per La Scienza , Pisa, Italy
| | - Godefridus J Peters
- Laboratory Medical Oncology, Amsterdam UMC Location VUMC, CCA , Amsterdam, The Netherlands.,Department of Biochemistry, Medical University of Gdansk , Gdansk, Poland
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16
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Zhang R, Liu J, Zhang W, Hua L, Qian LT, Zhou SB. EphA5 knockdown enhances the invasion and migration ability of esophageal squamous cell carcinoma via epithelial-mesenchymal transition through activating Wnt/β-catenin pathway. Cancer Cell Int 2020; 20:20. [PMID: 31956298 PMCID: PMC6958788 DOI: 10.1186/s12935-020-1101-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 01/07/2020] [Indexed: 12/24/2022] Open
Abstract
Background The erythropoietin-producing hepatocellular (Eph) receptor A5 (EphA5) has been found to be overexpressed in some malignant tumors and is associated with disease prognosis. However, the role of EphA5 in esophageal squamous cell carcinoma (ESCC) is not clear. Methods In the present study, we measured the expression of EphA5 in ESCC tissues and cell lines including KYSE150 and KYSE450 cells. siRNA transfection was used to interfere with EphA5 expression in ESCC cell lines. Cell viability, colony formation, scratch and invasion assays were performed to explore the roles of EphA5 in ESCC cell lines. Flow cytometry analysis was performed to investigate whether EphA5 could affect the cell apoptosis and cycle. The biomarkers related to epithelial-mesenchymal transition (EMT) and molecules associated with Wnt/β‑catenin signaling were also measured by western blot and immunofluorescence. Results The protein and mRNA expression of EphA5 were significantly higher in fresh ESCC tissues and cell lines compared with normal control groups and human normal esophageal epithelial cells (HEEC). The cell viability assay and colony formation assay revealed that EphA5 knockdown enhanced the proliferation of KYSE150 and KYSE450 cells in vitro. The invasion and migration of ESCC cells were accelerated after EphA5 knockdown. The expression of EMT biomarkers was altered in ESCC cells transfected with siRNA targeting EphA5. Moreover, EphA5 downregulation enhanced the protein levels of β‑catenin and p-GSK-3βSer9, which play a key role in the Wnt/β‑catenin pathway. Conclusions EphA5 knockdown promotes the proliferation of esophageal squamous cell carcinoma,enhances invasion and migration ability via epithelial-mesenchymal transition through activating Wnt/β‑catenin pathway.
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Affiliation(s)
- Rui Zhang
- 1School of Clinical Medicine, Shan Dong University, Jinan, 250000 Shandong People's Republic of China.,2Department of Oncology, Qing Pu Branch of Zhongshan Hospital Affiliated to Fudan University, Shanghai, 201799 People's Republic of China
| | - Jing Liu
- 2Department of Oncology, Qing Pu Branch of Zhongshan Hospital Affiliated to Fudan University, Shanghai, 201799 People's Republic of China
| | - Wei Zhang
- 3Department of Pathology, Taixing People's Hospital, Taixing, 225400 Jiangsu People's Republic of China
| | - Lei Hua
- 4Department of Provincial Clinical College, Anhui Provincial Hospital of Anhui Medical University, Hefei, 230031 Anhui People's Republic of China
| | - Li-Ting Qian
- 5Department of Radiation Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 People's Republic of China
| | - Shao-Bing Zhou
- 6Department of Radiation Oncology, Taixing People's Hospital, Taixing, Jiangsu 225400 People's Republic of China
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17
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Dastmalchi N, Safaralizadeh R, Baradaran B, Hosseinpourfeizi M, Baghbanzadeh A. An update review of deregulated tumor suppressive microRNAs and their contribution in various molecular subtypes of breast cancer. Gene 2019; 729:144301. [PMID: 31884105 DOI: 10.1016/j.gene.2019.144301] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 12/10/2019] [Accepted: 12/17/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Breast cancer (BC) is histologically classified into hormone-receptor+ (ER+, PR + ), human epidermal growth factor receptor-2+ (Her2 + ), and triple-negative breast cancer (TNBC) types. The important contribution of tumor-suppressive (TS) microRNAs (miRs) in BC development and treatment have been well-acknowledged in the literature. OBJECTIVE The present review focused on the contribution of recently examined TS miRs in the progression and treatment of various histological subtypes of BC. RESULTS In summary, various miRs have tumor-suppressive roles in BC, so that their aberrant expression leads to the abnormality in the cellular processes such as enhanced cell growth, decreased apoptosis, cell migration and metastasis, and decreased sensitivity to chemotherapy through deregulated expression of oncogene targets of TS miRs. CONCLUSION TS miRs could be regarded as a proper molecular target for target therapy of BC. However, further in vitro and in vivo investigations are required to confirm the exact molecular functions of TS miRs in BC cells to offer more efficient targeted therapies.
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Affiliation(s)
- Narges Dastmalchi
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Safaralizadeh
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran.
| | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Amir Baghbanzadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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18
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Conway JRW, Herrmann D, Evans TRJ, Morton JP, Timpson P. Combating pancreatic cancer with PI3K pathway inhibitors in the era of personalised medicine. Gut 2019; 68:742-758. [PMID: 30396902 PMCID: PMC6580874 DOI: 10.1136/gutjnl-2018-316822] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/02/2018] [Accepted: 10/04/2018] [Indexed: 12/16/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is among the most deadly solid tumours. This is due to a generally late-stage diagnosis of a primarily treatment-refractory disease. Several large-scale sequencing and mass spectrometry approaches have identified key drivers of this disease and in doing so highlighted the vast heterogeneity of lower frequency mutations that make clinical trials of targeted agents in unselected patients increasingly futile. There is a clear need for improved biomarkers to guide effective targeted therapies, with biomarker-driven clinical trials for personalised medicine becoming increasingly common in several cancers. Interestingly, many of the aberrant signalling pathways in PDAC rely on downstream signal transduction through the mitogen-activated protein kinase and phosphoinositide 3-kinase (PI3K) pathways, which has led to the development of several approaches to target these key regulators, primarily as combination therapies. The following review discusses the trend of PDAC therapy towards molecular subtyping for biomarker-driven personalised therapies, highlighting the key pathways under investigation and their relationship to the PI3K pathway.
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Affiliation(s)
- James RW Conway
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, New South Wales, Australia
| | - David Herrmann
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, New South Wales, Australia
- St Vincent’s Clinical School, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - TR Jeffry Evans
- Cancer Department, Cancer Research UK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Jennifer P Morton
- Cancer Department, Cancer Research UK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Paul Timpson
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, New South Wales, Australia
- St Vincent’s Clinical School, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
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19
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Li Y, Chu J, Feng W, Yang M, Zhang Y, Zhang Y, Qin Y, Xu J, Li J, Vasilatos SN, Fu Z, Huang Y, Yin Y. EPHA5 mediates trastuzumab resistance in HER2-positive breast cancers through regulating cancer stem cell-like properties. FASEB J 2019; 33:4851-4865. [PMID: 30620624 DOI: 10.1096/fj.201701561rrrr] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Trastuzumab is a successful, rationally designed therapy that provides significant clinical benefit for human epidermal growth factor receptor-2 (HER2)-positive breast cancer patients. However, about half of individuals with HER2-positive breast cancer do not respond to trastuzumab treatment because of various resistance mechanisms, including but not limited to: 1) shedding of the HER2 extracellular domain, 2) steric hindrance ( e.g., MUC4 and MUC1), 3) parallel pathway activation (this is the general mechanism cited in the quote above), 4) perturbation of downstream signaling events ( e.g., PTEN loss or PIK3CA mutation), and 5) immunologic mechanisms (such as FcR polymorphisms). EPHA5, a receptor tyrosine kinase, has been demonstrated to act as an anticancer agent in several cancer cell types. In this study, deletion of EPHA5 can significantly increase the resistance of HER2-positive breast cancer patients to trastuzumab. To investigate how EPHA5 deficiency induces trastuzumab resistance, clustered regularly interspaced short palindromic repeat technology was used to create EPHA5-deficient variants of breast cancer cells. EPHA5 deficiency effectively increases breast cancer stem cell (BCSC)-like properties, including NANOG, CD133+, E-cadherin expression, and the CD44+/CD24-/low phenotype, concomitantly enhancing mammosphere-forming ability. EPHA5 deficiency also caused significant aggrandized tumor malignancy in trastuzumab-sensitive xenografts, coinciding with the up-regulation of BCSC-related markers and intracellular Notch1 and PTEN/AKT signaling pathway activation. These findings highlight that EPHA5 is a potential prognostic marker for the activity of Notch1 and better sensitivity to trastuzumab in HER2-positive breast cancer. Moreover, patients with HER2-positive breast cancers expressing high Notch1 activation and low EPHA5 expression could be the best candidates for anti-Notch1 therapy.-Li, Y., Chu, J., Feng, W., Yang, M., Zhang, Y., Zhang, Y., Qin, Y., Xu, J., Li, J., Vasilatos, S. N., Fu, Z., Huang, Y., Yin, Y. EPHA5 mediates trastuzumab resistance in HER2-positive breast cancers through regulating cancer stem cell-like properties.
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Affiliation(s)
- Yongfei Li
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Pharmacology and Chemical Biology, University of Pittsburgh Medical Center (UPMC) Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; and.,Department of Breast Diseases, Jiangsu Province Hospital of Traditional Chinese Medicine (TMC)/Affiliated Hospital of Nanjing University of TCM, Nanjing, China
| | - Jiahui Chu
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Wanting Feng
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Mengzhu Yang
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yanhong Zhang
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yanqiu Zhang
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Ye Qin
- Department of Pharmacology and Chemical Biology, University of Pittsburgh Medical Center (UPMC) Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; and
| | - Juan Xu
- Nanjing Maternal and Child Health Medical Institute, Affiliated Obstetrics and Gynecology Hospital, Nanjing Medical University, Nanjing, China
| | - Jun Li
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Shauna N Vasilatos
- Department of Pharmacology and Chemical Biology, University of Pittsburgh Medical Center (UPMC) Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; and
| | - Ziyi Fu
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Nanjing Maternal and Child Health Medical Institute, Affiliated Obstetrics and Gynecology Hospital, Nanjing Medical University, Nanjing, China
| | - Yi Huang
- Department of Pharmacology and Chemical Biology, University of Pittsburgh Medical Center (UPMC) Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; and
| | - Yongmei Yin
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Viewing the Eph receptors with a focus on breast cancer heterogeneity. Cancer Lett 2018; 434:160-171. [PMID: 30055288 DOI: 10.1016/j.canlet.2018.07.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 07/18/2018] [Accepted: 07/23/2018] [Indexed: 02/07/2023]
Abstract
Aberrant expression of different family members of the Eph/ephrin system, which comprises the Eph receptors (Ephs) and their ligands (ephrins), has been implicated in various malignancies including breast cancer. The latter presents as a heterogeneous disease with diverse molecular, morphologic and clinical behavior signatures. This review reflects the existing Eph/ephrin literature while focusing on breast cancer heterogeneity. Hormone positive, HER2 positive and triple negative breast cancer (TNBC) cell lines, xenografts/mutant animal models and patient samples are examined separately as, in humans, they represent entities with differences in prognosis and treatment. EphA2, EphB4 and EphB6 are the members most extensively studied in breast cancer. Existing research points to the potential use of various Eph/ephrin members as biomarkers for assessing prognosis and selecting the most suitable therapeutic strategies in variable clinical scenarios, also for overcoming drug resistance, in the era of breast cancer heterogeneity.
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21
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Ligand-dependent EphA7 signaling inhibits prostate tumor growth and progression. Cell Death Dis 2017; 8:e3122. [PMID: 29022918 PMCID: PMC5682672 DOI: 10.1038/cddis.2017.507] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 08/08/2017] [Accepted: 08/17/2017] [Indexed: 01/02/2023]
Abstract
The downregulation of receptor tyrosine kinase EphA7 is frequent in epithelial cancers and linked to tumor progression. However, the detailed mechanism of EphA7-mediated prostate tumor progression remains elusive. To test the role of EphA7 receptor in prostate cancer (PCa) progression directly, we generated EphA7 receptor variants that were either lacking the cytoplasmic domain or carrying a point mutation that inhibits its phosphorylation by site-directed mutagenesis. Overexpression of wild-type (WT) EphA7 in PCa cells resulted in decreased tumor volume and increased tumor apoptosis in primary tumors. In addition, ectopic expression of WT EphA7 both can delay PCa cell proliferation and could inhibit PCa cell migration and invasion. This protein can also induce PCa cell apoptosis that correlated with increasing the protein expression levels of Bax, elevating the caspase-3 activities, reducing the protein expression levels of Bcl-2 and facilitating the dephosphorylation of Akt, which is further increased by the stimulation of ephrinA5-Fc. However, expression of these EphA7 mutants in PCa cells has no effect in vivo and in vitro. The expression of EphA7 and ephrinA5 was significantly decreased in PCa specimens compared with BPH tissues or paired normal tissues. Moreover, the phosphorylation of EphA7 was positively related with ephrinA5 expression in human prostate tissues. In sum, receptor phosphorylation of EphA7, at least in part, suppress PCa tumor malignancy through targeting PI3K/Akt signaling pathways.
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Dong Y, Liu Y, Jiang A, Li R, Yin M, Wang Y. MicroRNA-335 suppresses the proliferation, migration, and invasion of breast cancer cells by targeting EphA4. Mol Cell Biochem 2017; 439:95-104. [PMID: 28795314 DOI: 10.1007/s11010-017-3139-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 08/02/2017] [Indexed: 12/17/2022]
Abstract
MicroRNAs (miRNAs) are small noncoding RNAs that exert their functions by targeting specific mRNA sequences. Many studies have demonstrated that miRNAs are crucial for cancer progression, during which they can act as either oncogenes or tumor suppressors. Previous research has shown that miR-335 is downregulated in breast cancer, and it has been shown to be a breast cancer suppressor. In addition, emerging evidence indicates that erythropoietin-producing hepatocellular A4 (EphA4) is implicated in cancer cell proliferation, migration, and invasion. However, little is known about the relationship between miR-335 and EphA4 in breast cancer. In the present study, we used bioinformatic and biochemical analyses to demonstrate that EphA4 is a direct downstream target of miR-335 in human breast cancer MCF-7 and MDA-MB-23 cells and revealed that miR-335 negatively regulates the expression of EphA4 in these cells. Further investigation revealed that miR-335 overexpression inhibits MCF-7 and MDA-MB-231 cell proliferation and that this inhibition is attenuated by EphA4 coexpression. Similarly, miR-335 overexpression also inhibited growth and downregulated EphA4 expression in tumors in nude mice. Moreover, our results demonstrated that miR-335 overexpression suppresses migration and invasion in MCF-7 and MDA-MB-231 cells, an effect that was reversed by EphA4 overexpression. These findings confirmed that EphA4 is a direct target gene of miR-335 and that miR-335 suppresses breast cancer cell proliferation and motility in part by directly inhibiting EphA4 expression.
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Affiliation(s)
- Yilong Dong
- School of Medicine, Yunnan University, 2 Cuihu Bei Road, Kunming, 650091, Yunnan, People's Republic of China
| | - Yang Liu
- School of Medicine, Yunnan University, 2 Cuihu Bei Road, Kunming, 650091, Yunnan, People's Republic of China
| | - Aimei Jiang
- The First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Kunming, 650031, Yunnan, People's Republic of China
| | - Ruiqian Li
- The Third Affiliated Hospital of Kunming Medical University, 519 Kunzhou Road, Kunming, 650031, Yunnan, People's Republic of China
| | - Min Yin
- School of Medicine, Yunnan University, 2 Cuihu Bei Road, Kunming, 650091, Yunnan, People's Republic of China
| | - Yanmei Wang
- The First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Kunming, 650031, Yunnan, People's Republic of China.
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Chen X, Wang X, Wei X, Wang J. EphA5 protein, a potential marker for distinguishing histological grade and prognosis in ovarian serous carcinoma. J Ovarian Res 2016; 9:83. [PMID: 27887627 PMCID: PMC5123222 DOI: 10.1186/s13048-016-0292-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 11/16/2016] [Indexed: 12/11/2022] Open
Abstract
Background Ovarian serous carcinoma (OSC) is the most common ovarian epithelial malignancy. Disregulation of Eph/ephrin signaling has been implicated in oncogenesis and tumor progression. EphA5 receptor is one of large families of Eph tyrosine kinase receptor and is documented in the development of nervous system. Till now, there is no published data about the role of EphA5 in ovarian epithelial neoplasmas. Methods This study aims to investigate the expression of EphA5 protein in ovarian serous carcinoma, and its relationship to clinical pathological characteristics. Sixty-one cases of ovarian serous carcinoma, 24 cases of benign ovarian serous tumors, 42 cases of serous borderline tumors and 20 cases of normal fallopian tubes were examined using immunohistochemical staining. The relationship between EphA5 expression and pathological parameters was analyzed. Kaplan-Meier survival function was used to analyze prognosis of patients. Results Immunostaining analysis demonstrated that the EphA5 protein was highly expressed in 100% (20/20) of normal fallopian tube samples, 100% (24/24) of benign epithelial ovarian tumors, 76% (32/42) of ovarian serous borderline tumors, and 31% (19/61) of ovarian serous carcinomas. Loss of EphA5expression was associated with tumor grade (P < 0.001) and FIGO stage (P = 0.005). The survival analysis showed that patients with negative or weak expression of EphA5 protein had a poor outcome than those with positive expression (P = 0.004). Conclusions Our results show that EphA5 may be a potential biomarker for distinguishing high-and low-grade ovarian serous carcinoma and a potential prognostic marker.
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Affiliation(s)
- Xiao Chen
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, China
| | - Xuan Wang
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, China
| | - Xue Wei
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, China
| | - Jiandong Wang
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, China.
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24
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Takano H, Nakamura T, Tsuchikawa T, Kushibiki T, Hontani K, Inoko K, Takahashi M, Sato S, Abe H, Takeuchi S, Sato N, Hiraoka K, Nishihara H, Shichinohe T, Hirano S. Inhibition of Eph receptor A4 by 2,5-dimethylpyrrolyl benzoic acid suppresses human pancreatic cancer growing orthotopically in nude mice. Oncotarget 2016; 6:41063-76. [PMID: 26516928 PMCID: PMC4747390 DOI: 10.18632/oncotarget.5729] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 09/20/2015] [Indexed: 12/20/2022] Open
Abstract
Ephrin receptor A4 (EphA4) is overexpressed in human pancreatic adenocarcinoma (PDAC) and activate cell growth. Recent studies have identified small molecules that block EphA4. In this study, we investigated the correlation between EphA4 expression and the prognosis of patients with PDAC. We also examined the cytostatic efficacy of 2,5-dimethylpyrrolyl benzoic acid (compound 1), a small molecule that blocks EphA4, in PDAC cells. Overall survival of patients with EphA4 positivity was significantly shorter than that of patients with EphA4 negativity (P = 0.029). In addition, multivariate analysis revealed that EphA4 expression was an independent prognostic factor in PDAC patients (P = 0.039). Compound 1 showed a cytostatic efficacy in PDAC cells expressing EphA4 in vitro and in vivo. Our study indicated that compound 1 suppressed both EphA4 and Akt phosphorylations, and induced apoptosis in PDAC cells expressing EphA4. In conclusion,compound 1 has a high potential as a therapeutic agent for patients with PDAC.
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Affiliation(s)
- Hironobu Takano
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Toru Nakamura
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Takahiro Tsuchikawa
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Toshihiro Kushibiki
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Kouji Hontani
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Kazuho Inoko
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Mizuna Takahashi
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Shoki Sato
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Hirotake Abe
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Shintaro Takeuchi
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Nagato Sato
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Kei Hiraoka
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Hiroshi Nishihara
- Department of Translational Pathology, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Toshiaki Shichinohe
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Satoshi Hirano
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
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Humphrey ES, Su SP, Nagrial AM, Hochgräfe F, Pajic M, Lehrbach GM, Parton RG, Yap AS, Horvath LG, Chang DK, Biankin AV, Wu J, Daly RJ. Resolution of Novel Pancreatic Ductal Adenocarcinoma Subtypes by Global Phosphotyrosine Profiling. Mol Cell Proteomics 2016; 15:2671-85. [PMID: 27259358 PMCID: PMC4974343 DOI: 10.1074/mcp.m116.058313] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 05/11/2016] [Indexed: 12/20/2022] Open
Abstract
Comprehensive characterization of signaling in pancreatic ductal adenocarcinoma (PDAC) promises to enhance our understanding of the molecular aberrations driving this devastating disease, and may identify novel therapeutic targets as well as biomarkers that enable stratification of patients for optimal therapy. Here, we use immunoaffinity-coupled high-resolution mass spectrometry to characterize global tyrosine phosphorylation patterns across two large panels of human PDAC cell lines: the ATCC series (19 cell lines) and TKCC series (17 cell lines). This resulted in the identification and quantification of over 1800 class 1 tyrosine phosphorylation sites and the consistent segregation of both PDAC cell line series into three subtypes with distinct tyrosine phosphorylation profiles. Subtype-selective signaling networks were characterized by identification of subtype-enriched phosphosites together with pathway and network analyses. This revealed that the three subtypes characteristic of the ATCC series were associated with perturbations in signaling networks associated with cell-cell adhesion and epithelial-mesenchyme transition, mRNA metabolism, and receptor tyrosine kinase (RTK) signaling, respectively. Specifically, the third subtype exhibited enhanced tyrosine phosphorylation of multiple RTKs including the EGFR, ERBB3 and MET. Interestingly, a similar RTK-enriched subtype was identified in the TKCC series, and 'classifier' sites for each series identified using Random Forest models were able to predict the subtypes of the alternate series with high accuracy, highlighting the conservation of the three subtypes across the two series. Finally, RTK-enriched cell lines from both series exhibited enhanced sensitivity to the small molecule EGFR inhibitor erlotinib, indicating that their phosphosignature may provide a predictive biomarker for response to this targeted therapy. These studies highlight how resolution of subtype-selective signaling networks can provide a novel taxonomy for particular cancers, and provide insights into PDAC biology that can be exploited for improved patient management.
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Affiliation(s)
- Emily S Humphrey
- From the ‡Cancer Division and Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW 2010, Australia; §St Vincent's Hospital Clinical School, Faculty of Medicine, University of New South Wales, NSW 2052, Australia
| | - Shih-Ping Su
- ¶Cancer Program, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Level 1, Building 77, Monash University, VIC 3800, Australia
| | - Adnan M Nagrial
- From the ‡Cancer Division and Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW 2010, Australia; §St Vincent's Hospital Clinical School, Faculty of Medicine, University of New South Wales, NSW 2052, Australia
| | - Falko Hochgräfe
- ‖Competence Center Functional Genomics, University of Greifswald, F.-L-Jahnstr. 15, 17489 Greifswald, Germany
| | - Marina Pajic
- From the ‡Cancer Division and Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW 2010, Australia; §St Vincent's Hospital Clinical School, Faculty of Medicine, University of New South Wales, NSW 2052, Australia
| | - Gillian M Lehrbach
- From the ‡Cancer Division and Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW 2010, Australia
| | - Robert G Parton
- **Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane QLD 4072, Australia
| | - Alpha S Yap
- **Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane QLD 4072, Australia
| | - Lisa G Horvath
- From the ‡Cancer Division and Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW 2010, Australia; ‡‡Chris O'Brien Lifehouse, Missenden Road, Camperdown, NSW 2050, Australia
| | - David K Chang
- §§Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK
| | - Andrew V Biankin
- §§Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK;
| | - Jianmin Wu
- ¶¶Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Center for Cancer Bioinformatics, Peking University Cancer Hospital & Institute, 52 Fu-Cheng Road, Hai-Dian District, Beijing 100142, China From the ‡Cancer Division and Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW 2010, Australia; §St Vincent's Hospital Clinical School, Faculty of Medicine, University of New South Wales, NSW 2052, Australia;
| | - Roger J Daly
- ¶Cancer Program, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Level 1, Building 77, Monash University, VIC 3800, Australia;
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Vartholomaiou E, Echeverría PC, Picard D. Unusual Suspects in the Twilight Zone Between the Hsp90 Interactome and Carcinogenesis. Adv Cancer Res 2015; 129:1-30. [PMID: 26915999 DOI: 10.1016/bs.acr.2015.08.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The molecular chaperone Hsp90 has attracted a lot of interest in cancer research ever since cancer cells were found to be more sensitive to Hsp90 inhibition than normal cells. Why that is has remained a matter of debate and is still unclear. In addition to increased Hsp90 dependence for some mutant cancer proteins and modifications of the Hsp90 machinery itself, a number of other characteristics of cancer cells probably contribute to this phenomenon; these include aneuploidy and overall increased numbers and levels of defective and mutant proteins, which all contribute to perturbed proteostasis. Work over the last two decades has demonstrated that many cancer-related proteins are Hsp90 clients, and yet only few of them have been extensively investigated, selected either on the basis of their obvious function as cancer drivers or because they proved to be convenient biomarkers for monitoring the effects of Hsp90 inhibitors. The purpose of our review is to go beyond these "usual suspects." We established a workflow to select poorly studied proteins that are related to cancer processes and qualify as Hsp90 clients. By discussing and taking a fresh look at these "unusual suspects," we hope to stimulate others to revisit them as novel therapeutic targets or diagnostic markers.
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Affiliation(s)
| | - Pablo C Echeverría
- Département de Biologie Cellulaire, Université de Genève, Sciences III, Geneva, Switzerland
| | - Didier Picard
- Département de Biologie Cellulaire, Université de Genève, Sciences III, Geneva, Switzerland.
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27
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Koutsounas I, Giaginis C, Alexandrou P, Zizi-Serbetzoglou A, Patsouris E, Kouraklis G, Theocharis S. Pregnane X Receptor Expression in Human Pancreatic Adenocarcinoma: Associations With Clinicopathologic Parameters, Tumor Proliferative Capacity, Patients' Survival, and Retinoid X Receptor Expression. Pancreas 2015; 44:1134-40. [PMID: 26355550 DOI: 10.1097/mpa.0000000000000405] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Pregnane X receptor (PXR) has been involved in human malignancy, either by directly affecting carcinogenesis or by inducing drug-drug interactions and chemotherapy resistance. The present study aimed to assess the clinical significance of PXR in pancreatic adenocarcinoma. METHODS Pregnane X receptor and its heterodimers' PXR/retinoid X receptor α (RXR-α), RXR-β, and RXR-γ expression were assessed immunohistochemically on tumoral samples from 55 pancreatic adenocarcinoma patients and were associated with clinicopathologic parameters, tumor proliferative capacity, and patients' survival. RESULTS Enhanced PXR expression was noted in 24 (43.6%) of 55 pancreatic adenocarcinoma cases. Pancreatic adenocarcinoma patients presenting increased histological grade of tumor differentiation showed a significant increased incidence of elevated PXR expression (P = 0.023). Enhanced PXR/RXR-β expression was significantly associated with smaller tumor size and earlier clinical stage (P = 0.005 and P = 0.003, respectively). Elevated PXR/RXR-γ expression was significantly associated with smaller tumor size and earlier clinical stage (P = 0.012 and P = 0.014, respectively) and borderline with the absence of lymph node metastases (P = 0.056). In addition, pancreatic adenocarcinoma patients presenting enhanced PXR/RXR-γ expression showed marginally longer survival times compared with those with decreased expression (log-rank test, P = 0.053). CONCLUSIONS This study supported evidence that PXR and its copartners' overexpression may be associated with favorable clinicopathologic parameters and better outcome in pancreatic adenocarcinoma.
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Affiliation(s)
- Ioannis Koutsounas
- From the *First Department of Pathology, Medical School, National and Kapodistrian University of Athens, Athens; †Department of Food Science and Nutrition, School of the Environment, University of the Aegean, Myrina, Lemnos; ‡Department of Pathology, Tzaneio General Hospital, Piraeus; and §Second Department of Propedeutic Surgery, Medical School, University of Athens, Athens, Greece
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Abstract
Ephrin receptors (Ephs) are frequently overexpressed in a wide variety of human malignant tumors, being associated with tumor growth, invasion, angiogenesis and metastasis. The present study aimed to evaluate the clinical significance of EphB4 and EphB6 protein expression in human malignant and benign thyroid lesions. EphB4 and EphB6 protein expression was assessed immunohistochemically on paraffin-embedded thyroid tissues obtained from 127 patients with benign (n = 71) and malignant (n = 56) thyroid lesions. Enhanced EphB4 and EphB6 expression was more frequently observed in malignant compared to benign thyroid lesions (p = 0.0508 and p = 0.0006, respectively). EphB4 and EphB6 expression also provided a distinct discrimination between papillary carcinoma and hyperplastic nodules (p = 0.0302 and p = 0.0013, respectively). In malignant thyroid lesions, enhanced EphB4 expression was significantly associated with larger tumor size (p = 0.0366). Enhanced EphB6 expression was significantly associated with larger tumor size (p = 0.0366), the presence of lymph node metastases (p = 0.0023), the presence of capsular (p = 0.0038), lymphatic (p = 0.0053) and vascular invasion (p = 0.0018) and increased risk of recurrence rate (p = 0.0038). The present study supported evidence that EphB4 and mainly EphB6 may participate in the malignant thyroid transformation, reinforcing their utility as useful biomarkers and possible therapeutic targets in this type of neoplasia.
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Kampen KR, Scherpen FJG, Garcia-Manero G, Yang H, Kaspers GJL, Cloos J, Zwaan CM, van den Heuvel-Eibrink MM, Kornblau SM, De Bont ESJM. EphB1 Suppression in Acute Myelogenous Leukemia: Regulating the DNA Damage Control System. Mol Cancer Res 2015; 13:982-92. [PMID: 25944917 DOI: 10.1158/1541-7786.mcr-14-0660-t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 04/24/2015] [Indexed: 11/16/2022]
Abstract
UNLABELLED Loss of ephrin receptor (EphB1) expression may associate with aggressive cancer phenotypes; however, the mechanism of action remains unclear. To gain detailed insight into EphB1 function in acute myelogenous leukemia (AML), comprehensive analysis of EphB1 transcriptional regulation was conducted. In AML cells, EphB1 transcript was inversely correlated with EphB1 promoter methylation. The presence of EphB1 allowed EfnB1 ligand-mediated p53 DNA binding, leading to restoration of the DNA damage response (DDR) cascade by the activation of ATR, Chk1, p53, p21, p38, CDK1(tyr15), and Bax, and downregulation of HSP27 and Bcl2. Comparatively, reintroduction of EphB1 expression in EphB1-methylated AML cells enhanced the same cascade of ATR, Chk1, p21, and CDK1(tyr15), which consequently enforced programmed cell death. Interestingly, in pediatric AML samples, EphB1 peptide phosphorylation and mRNA expression were actively suppressed as compared with normal bone marrow, and a significant percentage of the primary AML specimens had EphB1 promoter hypermethylation. Finally, EphB1 repression associated with a poor overall survival in pediatric AML. Combined, the contribution of EphB1 to the DDR system reveals a tumor-suppressor function for EphB1 in pediatric AML. IMPLICATIONS The tumor-suppressor function of EphB1 is clinically relevant across many malignancies, suggesting that EphB1 is an important regulator of common cancer cell transforming pathways.
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Affiliation(s)
- K R Kampen
- Department of Pediatric Oncology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - F J G Scherpen
- Department of Pediatric Oncology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - G Garcia-Manero
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - H Yang
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - G J L Kaspers
- Department of Pediatric Oncology, VU University Medical Center, Amsterdam, the Netherlands
| | - J Cloos
- Department of Pediatric Oncology, VU University Medical Center, Amsterdam, the Netherlands
| | - C M Zwaan
- Department of Pediatric Oncology, Erasmus MC-Sophia Children's Hospital, Rotterdam, the Netherlands
| | | | - S M Kornblau
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - E S J M De Bont
- Department of Pediatric Oncology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
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30
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Staquicini FI, Qian MD, Salameh A, Dobroff AS, Edwards JK, Cimino DF, Moeller BJ, Kelly P, Nunez MI, Tang X, Liu DD, Lee JJ, Hong WK, Ferrara F, Bradbury ARM, Lobb RR, Edelman MJ, Sidman RL, Wistuba II, Arap W, Pasqualini R. Receptor tyrosine kinase EphA5 is a functional molecular target in human lung cancer. J Biol Chem 2015; 290:7345-59. [PMID: 25623065 PMCID: PMC4367244 DOI: 10.1074/jbc.m114.630525] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Lung cancer is often refractory to radiotherapy, but molecular mechanisms of tumor resistance remain poorly defined. Here we show that the receptor tyrosine kinase EphA5 is specifically overexpressed in lung cancer and is involved in regulating cellular responses to genotoxic insult. In the absence of EphA5, lung cancer cells displayed a defective G1/S cell cycle checkpoint, were unable to resolve DNA damage, and became radiosensitive. Upon irradiation, EphA5 was transported into the nucleus where it interacted with activated ATM (ataxia-telangiectasia mutated) at sites of DNA repair. Finally, we demonstrate that a new monoclonal antibody against human EphA5 sensitized lung cancer cells and human lung cancer xenografts to radiotherapy and significantly prolonged survival, thus suggesting the likelihood of translational applications.
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Affiliation(s)
- Fernanda I Staquicini
- From the University of New Mexico Cancer Center and the Divisions of Molecular Medicine and
| | - Ming D Qian
- the Departments of Genitourinary Medical Oncology
| | | | - Andrey S Dobroff
- From the University of New Mexico Cancer Center and the Divisions of Molecular Medicine and
| | | | - Daniel F Cimino
- From the University of New Mexico Cancer Center and the Divisions of Molecular Medicine and
| | | | - Patrick Kelly
- the Departments of Genitourinary Medical Oncology, Radiation Oncology
| | | | | | | | | | - Waun Ki Hong
- Thoracic/Head & Neck Medical Oncology, David H. Koch Center, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Fortunato Ferrara
- From the University of New Mexico Cancer Center and the Divisions of Molecular Medicine and
| | - Andrew R M Bradbury
- the Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Roy R Lobb
- Alvos Therapeutics, Arrowhead Research Corporation, Pasadena, California 91101
| | - Martin J Edelman
- Alvos Therapeutics, Arrowhead Research Corporation, Pasadena, California 91101
| | - Richard L Sidman
- the Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215
| | | | - Wadih Arap
- From the University of New Mexico Cancer Center and Hematology/Medical Oncology, Department of Internal Medicine University of New Mexico School of Medicine, Albuquerque, New Mexico 87131-0001,
| | - Renata Pasqualini
- From the University of New Mexico Cancer Center and the Divisions of Molecular Medicine and
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Liu C, Huang H, Wang C, Kong Y, Zhang H. Involvement of ephrin receptor A4 in pancreatic cancer cell motility and invasion. Oncol Lett 2014; 7:2165-2169. [PMID: 24932309 PMCID: PMC4049679 DOI: 10.3892/ol.2014.2011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 02/26/2014] [Indexed: 01/05/2023] Open
Abstract
Ephrin (EPH) receptors can be classified into EPHA and EPHB receptors and are important in diverse cellular processes. EPHA4, a member of the EPHA receptors, has been demonstrated to be elevated in various human cancers and involved in the tumor progression. However, the role of EPHA4 in pancreatic cancer cells remains unclear. Therefore, the present study transfected Panc-1 and BxPC-3 cells with small interfering RNA (siRNA) to knockdown the expression of EPHA4. Wound healing and invasion assays were then performed to assess the effect of EPHA4 knockdown on the motility and invasion of pancreatic cancer cells. The results demonstrated that the knockdown of EPHA4 by siRNA inhibits the motility and invasion of pancreatic cancer cells. Furthermore, gelatin zymography assay showed that EPHA4 may regulate the activity of matrix metalloproteinase (MMP)-2. In addition, the knockdown of EPHA4 increased the expression of epithelial (E)-cadherin, as well as decreased the expression of Snail. Overall, these results suggested that EPHA4 may promote the motility and invasion of pancreatic cancer cells via the upregulation of MMP-2 and Snail, as well as the downregulation of E-cadherin. Thus, EPHA4 may act as a useful target for the treatment of pancreatic cancer.
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Affiliation(s)
- Chengli Liu
- Department of Hepatobiliary Surgery, Air Force General Hospital of PLA, Beijing 100142, P.R. China
| | - Hui Huang
- Department of Hepatobiliary Surgery, 309 Hospital of PLA, Beijing 100091, P.R. China
| | - Cheng Wang
- Department of Hepatobiliary Surgery, Air Force General Hospital of PLA, Beijing 100142, P.R. China
| | - Yalin Kong
- Department of Hepatobiliary Surgery, Air Force General Hospital of PLA, Beijing 100142, P.R. China
| | - Hongyi Zhang
- Department of Hepatobiliary Surgery, Air Force General Hospital of PLA, Beijing 100142, P.R. China
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Giaginis C, Tsoukalas N, Bournakis E, Alexandrou P, Kavantzas N, Patsouris E, Theocharis S. Ephrin (Eph) receptor A1, A4, A5 and A7 expression in human non-small cell lung carcinoma: associations with clinicopathological parameters, tumor proliferative capacity and patients' survival. BMC Clin Pathol 2014; 14:8. [PMID: 24495444 PMCID: PMC4234387 DOI: 10.1186/1472-6890-14-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Accepted: 01/27/2014] [Indexed: 12/22/2022] Open
Abstract
Background Ephrin (Eph) receptors are frequently overexpressed in a wide variety of human malignant tumors, being associated with tumor growth, invasion, metastasis and angiogenesis. The present study aimed to evaluate the clinical significance of EphA1, A4, A5 and A7 protein expression in non-small cell lung carcinoma (NSCLC). Methods EphA1, A4, A5 and A7 protein expression was assessed immunohistochemically in tissue microarrays of 88 surgically resected NSCLC and was analyzed in relation with clinicopathological characteristics and patients’ survival. Results Elevated EphA4 expression was significantly associated with low histopathological stage and presence of inflammation (p = 0.047 and p = 0.026, respectively). Elevated EphA7 expression was significantly associated with older patients’ age, presence of fibrosis and smaller tumor size (p = 0.036, p = 0.029 and p = 0.018, respectively). EphA1, A5 and A7 expression were positively associated with tumor proliferative capacity (p = 0.047, p = 0.002 and p = 0.046, respectively). Elevated EphA4, A5 and A7 expression were identified as predictors of favourable patients’ survival at both univariate (Log-rank test, 0 = 0.019, p = 0.006 and p = 0.012, respectively) and multivariate levels (Cox-regression analysis, p = 0.029, p = 0.068 and p = 0.044, respectively). Conclusions The present study supported evidence that Ephs may be involved in lung cancer progression, reinforcing their utility as clinical biomarkers for patients’ management and prognosis, as also as potential targets for future therapeutic interventions.
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Affiliation(s)
| | | | | | | | | | | | - Stamatios Theocharis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 75 M, Asias str,, Goudi, Athens GR11527, Greece.
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Huan X, Shi J, Lim L, Mitra S, Zhu W, Qin H, Pasquale EB, Song J. Unique structure and dynamics of the EphA5 ligand binding domain mediate its binding specificity as revealed by X-ray crystallography, NMR and MD simulations. PLoS One 2013; 8:e74040. [PMID: 24086308 PMCID: PMC3782497 DOI: 10.1371/journal.pone.0074040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/25/2013] [Indexed: 12/26/2022] Open
Abstract
The 16 EphA and EphB receptors represent the largest family of receptor tyrosine kinases, and their interactions with 9 ephrin-A and ephrin-B ligands initiate bidirectional signals controlling many physiological and pathological processes. Most interactions occur between receptor and ephrins of the same class, and only EphA4 can bind all A and B ephrins. To understand the structural and dynamic principles that enable Eph receptors to utilize the same jellyroll β-sandwich fold to bind ephrins, the VAPB-MSP domain, peptides and small molecules, we have used crystallography, NMR and molecular dynamics (MD) simulations to determine the first structure and dynamics of the EphA5 ligand-binding domain (LBD), which only binds ephrin-A ligands. Unexpectedly, despite being unbound, the high affinity ephrin-binding pocket of EphA5 resembles that of other Eph receptors bound to ephrins, with a helical conformation over the J–K loop and an open pocket. The openness of the pocket is further supported by NMR hydrogen/deuterium exchange data and MD simulations. Additionally, the EphA5 LBD undergoes significant picosecond-nanosecond conformational exchanges over the loops, as revealed by NMR and MD simulations, but lacks global conformational exchanges on the microsecond-millisecond time scale. This is markedly different from the EphA4 LBD, which shares 74% sequence identity and 87% homology. Consequently, the unbound EphA5 LBD appears to comprise an ensemble of open conformations that have only small variations over the loops and appear ready to bind ephrin-A ligands. These findings show how two proteins with high sequence homology and structural similarity are still able to achieve distinctive binding specificities through different dynamics, which may represent a general mechanism whereby the same protein fold can serve for different functions. Our findings also suggest that a promising strategy to design agonists/antagonists with high affinity and selectivity might be to target specific dynamic states of the Eph receptor LBDs.
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Affiliation(s)
- Xuelu Huan
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Republic of Singapore
| | - Jiahai Shi
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, Republic of Singapore
| | - Liangzhong Lim
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, Republic of Singapore
| | - Sayantan Mitra
- Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
| | - Wanlong Zhu
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, Republic of Singapore
| | - Haina Qin
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, Republic of Singapore
| | - Elena B. Pasquale
- Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
- Pathology Department, University of California San Diego, La Jolla, California, United States of America
| | - Jianxing Song
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Republic of Singapore
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, Republic of Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore
- * E-mail:
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Theocharis S, Klijanienko J, Giaginis C, Alexandrou P, Patsouris E, Sastre-Garau X. Ephrin receptor (Eph) -A1, -A2, -A4 and -A7 expression in mobile tongue squamous cell carcinoma: associations with clinicopathological parameters and patients survival. Pathol Oncol Res 2013; 20:277-84. [PMID: 24022400 DOI: 10.1007/s12253-013-9692-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 08/30/2013] [Indexed: 10/26/2022]
Abstract
Ephrin receptors (Ephs) are frequently overexpressed in a wide variety of human malignant tumors, being associated with tumor growth, invasion, metastasis and angiogenesis. The present study aimed to evaluate the clinical significance of Eph-A1, -A2, -A4 and -A7 protein expression in mobile tongue squamous cell carcinoma (SCC). Eph-A1, -A2, -A4 and -A7 protein expression was assessed immunohistochemically on 37 mobile tongue SCC tissue samples and was analyzed in relation with clinicopathological characteristics, overall and disease-free patients' survival. All the examined mobile tongue SCC cases were found positive for Eph-A1, -A2, -A4 and -A7. Significant associations were noted between high Eph-A1, -A4 and -A7 expression and absence of lymph node metastases (p = 0.0263, p = 0.0461 and p = 0.0461, respectively). High Eph-A1, -A2 and -A7 expression was significantly more frequently observed in patients presenting absence of vascular invasion (p = 0.0444), dense stromal inflammatory reaction (p = 0.0063) and female gender (p = 0.0327), respectively. Mobile tongue SCC patients with high Eph-A7 expression presented longer overall and disease-free survival compared to those with low Eph-A7 expression (log-rank test, p = 0.0093 and p = 0.0164, respectively). In multivariate analysis, Eph-A7 expression was identified as independent prognostic factor of overall survival (Cox-regression analysis, p = 0.0426). The present study supported evidence that Ephs may participate in the malignant transformation of mobile tongue SCC, reinforcing their utility as clinical markers for patients' management and prognosis, as also as targets for potential therapeutic intervention in tongue chemoprevention.
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Wu X, Wang L, Ye Y, Aakre JA, Pu X, Chang GC, Yang PC, Roth JA, Marks RS, Lippman SM, Chang JY, Lu C, Deschamps C, Su WC, Wang WC, Huang MS, Chang DW, Li Y, Pankratz VS, Minna JD, Hong WK, Hildebrandt MAT, Hsiung CA, Yang P. Genome-wide association study of genetic predictors of overall survival for non-small cell lung cancer in never smokers. Cancer Res 2013; 73:4028-38. [PMID: 23704207 DOI: 10.1158/0008-5472.can-12-4033] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
To identify the genetic factors that influence overall survival in never smokers who have non-small cell lung carcinoma (NSCLC), we conducted a consistency meta-analysis study using genome-wide association approaches for overall survival in 327 never smoker patients with NSCLC from The University of Texas MD Anderson Cancer Center (Houston, TX) and 293 cases from the Mayo Clinic (Rochester, MN). We then conducted a two-pronged validation of the top 25 variants that included additional validation in 1,256 patients with NSCLC from Taiwan and assessment of expression quantitative trait loci (eQTL) and differential expression of genes surrounding the top loci in 70 tumors and matched normal tissues. A total of 94 loci were significant for overall survival in both MD Anderson and Mayo studies in the consistency meta-analysis phase, with the top 25 variants reaching a P value of 10(-6). Two variants of these 25 were also significant in the Taiwanese population: rs6901416 [HR, 1.44; 95% confidence interval (CI), 1.01-2.06] and rs10766739 (HR, 1.23; 95%CI, 1.00-1.51). These loci resulted in a reduction of median survival time of at least eight and five months in three populations, respectively. An additional six variants (rs4237904, rs7976914, rs4970833, rs954785, rs485411, and rs10906104) were validated through eQTL analysis that identified significant correlations with expression levels of six genes (LEMD3, TMBIM, ATXN7L2, SHE, ITIH2, and NUDT5, respectively) in normal lung tissue. These genes were also significantly differentially expressed between the tumor and normal lung tissue. These findings identify several novel, candidate prognostic markers for NSCLC in never smokers, with eQTL analysis suggesting a potential biologic mechanism for a subset of these observed associations.
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Affiliation(s)
- Xifeng Wu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
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Karidis NP, Giaginis C, Tsourouflis G, Alexandrou P, Delladetsima I, Theocharis S. Eph-A2 and Eph-A4 expression in human benign and malignant thyroid lesions: an immunohistochemical study. Med Sci Monit 2011; 17:BR257-65. [PMID: 21873938 PMCID: PMC3560523 DOI: 10.12659/msm.881929] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Background Ephrin receptors (Ephs) are frequently overexpressed in a wide variety of human malignant tumors, being associated with tumor growth, invasion, metastasis and angiogenesis. The aim of the present study was to evaluate the clinical significance of Eph-A2 and Eph-A4 expression in human benign and malignant thyroid lesions. Material/Methods Eph-A2 and Eph-A4 protein expression was assessed immunohistochemically on paraffin-embedded thyroid tissues from 131 patients with benign and malignant lesions. Results Eph-A2 was significantly overexpressed in malignant compared to benign thyroid lesions (p<0.001). Papillary carcinoma cases presented significantly increased Eph-A2 expression compared to those with hyperplasia nodules (p<0.001). Eph-A4 expression was not differentiated between cases with malignant or benign thyroid lesions. Papillary carcinoma cases presented significantly increased Eph-A4 expression compared to those with hyperplasia nodules (p=0.006). In the subgroup of malignant thyroid lesions, Eph-A2 and Eph-A4 expression was not associated with TNM stage, capsular, lymphatic or vascular invasion. Conclusions The present data suggest that Eph-A2, but not Eph-A4, overexpression may be associated with the malignant transformation of thyroid neoplasia. Further studies conducted on cohorts including a higher proportion of patients with advanced nodal and metastatic disease are recommended to draw definite conclusions on the clinical significance of Eph proteins in thyroid neoplasia.
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Affiliation(s)
- Nikolaos P Karidis
- Department of Forensic Medicine and Toxicology, Medical School, University of Athens, Athens, Greece
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Wang TH, Chang JL, Ho JY, Wu HC, Chen TC. EphrinA5 suppresses colon cancer development by negatively regulating epidermal growth factor receptor stability. FEBS J 2011; 279:251-63. [PMID: 22074469 DOI: 10.1111/j.1742-4658.2011.08419.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Colon cancer is one of the most common human cancers worldwide. Owing to its aggressiveness and lethality, it is necessary to determine the mechanisms regulating the carcinogenesis of colon cancer. EphrinA5 has been reported to act as a putative tumor suppressor in glioma; however, little is known concerning the role of this protein in the context of colon cancer. To elucidate the biological significance of ephrinA5 in colon cancer, we examined ephrinA5 and epidermal growth factor receptor (EGFR) expression profiles in both colon cancer and normal tissues, using immunohistochemistry on a 96-spot tissue microarray. Gain-of-function and loss-of-function experiments were performed on the human colon cancer cell lines SW480 and WiDr to determine the biological effects of ephrinA5 in relation to cell proliferation, survival, and migration. It was found that ephrinA5 mRNA and protein levels were significantly reduced in colon cancer as compared with normal colon tissue specimens. EphrinA5 expression was also negatively associated with tumor differentiation and clinical stage. In colon cancer cell line models, ephrinA5 exerted an inhibitory effect on EGFR by promoting c-Cbl-mediated EGFR ubiquitination and degradation. EphrinA5 did not affect the transcriptional regulation of EGFR mRNA expression in colon cancer cells. Expression of ephrinA5 suppressed colon cancer cell proliferation, migration, and chemotherapeutic resistance. In conclusion, ephrinA5 inhibited colon cancer progression by promoting c-Cbl-mediated EGFR degradation. Our findings identify a novel mechanism that could be utilized to improve the therapeutic efficiency of EGFR-targeting strategies.
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Affiliation(s)
- Tong-Hong Wang
- Tissue Bank, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
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Brantley-Sieders DM. Clinical relevance of Ephs and ephrins in cancer: lessons from breast, colorectal, and lung cancer profiling. Semin Cell Dev Biol 2011; 23:102-8. [PMID: 22040912 DOI: 10.1016/j.semcdb.2011.10.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 10/17/2011] [Indexed: 01/04/2023]
Abstract
Pre-clinical studies provide compelling evidence that members of the Eph family of receptor tyrosine kinases and their ephrin ligands promote tumor growth, invasion and metastasis, and neovascularization. Tumor suppressive roles have also been reported for the receptors, and ligand-dependent versus ligand-independent signaling has emerged as one key mechanism underlying tumor suppressive function as opposed to oncogenic effects. Determining how these observations relate to clinical outcome is a crucial step for translating the biological and mechanistic data into new molecularly targeted therapies. Expression profiling in human patient samples bridges this gap and provides valuable clinical relevance to laboratory observations. In addition to analyses performed using privately assembled patient tumor samples, publically available microarray datasets and tissue microarrays linked to clinical data have emerged as tractable tools for addressing the clinical relevance of specific molecules and families of related molecules. This review summarizes the clinical relevance of specific Eph and ephrin molecules in human breast, colorectal, and lung cancers.
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Affiliation(s)
- Dana M Brantley-Sieders
- Department of Medicine, Vanderbilt University School of Medicine, A-4323 MCN, 1161 21st Avenue South, Nashville, TN 37232-2363, USA.
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Liu DC, Yang ZL. MTDH and EphA7 are markers for metastasis and poor prognosis of gallbladder adenocarcinoma. Diagn Cytopathol 2011; 41:199-205. [PMID: 21964981 DOI: 10.1002/dc.21821] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Accepted: 07/23/2011] [Indexed: 01/06/2023]
Abstract
Gallbladder cancer is an aggressive cancer with extremely poor prognosis. Over 90% of patients are diagnosed at an advanced, inoperable stage with metastasis and invasion to other organs. In this study, the expression of metadherin (MTDH) and erythropoietin-producing hepatoma-amplified sequence (Eph) receptor A7 (EphA7) in 96 benign and 108 malignant lesions of gallbladder was determined by immunohistochemistry, and their correlations with pathological features and prognosis were analyzed. Positive expression of EphA7 and MTDH was significantly higher in gallbladder adenocarcinoma than in benign lesions. In adenocarcinoma, the positive expression of EphA7 and MTDH was significantly associated with differentiation, tumor mass, lymphnode metastasis, invasion, and overall survival. Multivariate Cox regression analysis suggested that positive expression of EphA7 and MTDH was an independent poor-prognostic predictor in gallbladder adenocarcinoma. The elevated expression of EphA7 and/or MTDH is closely related to carcinogenesis, progression, clinical biological behaviors, and prognosis of gallbladder adenocarcinoma.
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Affiliation(s)
- Dong-Cai Liu
- Departemt of Geriatric Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
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Truitt L, Freywald A. Dancing with the dead: Eph receptors and their kinase-null partners. Biochem Cell Biol 2011; 89:115-29. [PMID: 21455264 DOI: 10.1139/o10-145] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Eph receptor tyrosine kinases and their ligands, ephrins, are membrane proteins coordinating a wide range of biological functions both in developing embryos and in adult multicellular organisms. Numerous studies have implicated Eph receptors in the induction of opposing responses, including cell adhesion or repulsion, support or inhibition of cell proliferation and cell migration, and progression or suppression of multiple malignancies. Similar to other receptor tyrosine kinases, Eph receptors rely on their ability to catalyze tyrosine phosphorylation for signal transduction. Interestingly, however, Eph receptors also actively utilize three kinase-deficient receptor tyrosine kinases, EphB6, EphA10, and Ryk, in their signaling network. The accumulating evidence suggests that the unusual flexibility of the Eph family, allowing it to initiate antagonistic responses, might be partially explained by the influence of the kinase-dead participants and that the exact outcome of an Eph-mediated action is likely to be defined by the balance between the signaling of catalytically potent and catalytically null receptors. We discuss in this minireview the emerging functions of the kinase-dead EphB6, EphA10, and Ryk receptors both in normal biological responses and in malignancy, and analyze currently available information related to the molecular mechanisms of their action in the context of the Eph family.
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Affiliation(s)
- Luke Truitt
- Department of Chemistry and Biochemistry, University of Regina, Sasketchewan, Canada
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Giaginis C, Michailidi C, Stolakis V, Alexandrou P, Tsourouflis G, Klijanienko J, Delladetsima I, Theocharis S. Expression of DNA repair proteins MSH2, MLH1 and MGMT in human benign and malignant thyroid lesions: an immunohistochemical study. Med Sci Monit 2011; 17:BR81-90. [PMID: 21358597 PMCID: PMC3524721 DOI: 10.12659/msm.881444] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background DNA repair is a major defense mechanism, which contributes to the maintenance of genetic sequence, and minimizes cell death, mutation rates, replication errors, DNA damage persistence and genomic instability. Alterations in the expression levels of proteins participating in DNA repair mechanisms have been associated with several aspects of cancer biology. The present study aimed to evaluate the clinical significance of DNA repair proteins MSH2, MLH1 and MGMT in benign and malignant thyroid lesions. Material/Methods MSH2, MLH1 and MGMT protein expression was assessed immunohistochemically on paraffin-embedded thyroid tissues from 90 patients with benign and malignant lesions. Results The expression levels of MLH1 was significantly upregulated in cases with malignant compared to those with benign thyroid lesions (p=0.038). The expression levels of MGMT was significantly downregulated in malignant compared to benign thyroid lesions (p=0.001). Similar associations for both MLH1 and MGMT between cases with papillary carcinoma and hyperplastic nodules were also noted (p=0.014 and p=0.026, respectively). In the subgroup of malignant thyroid lesions, MSH2 downregulation was significantly associated with larger tumor size (p=0.031), while MLH1 upregulation was significantly associated with the presence of lymphatic and vascular invasion (p=0.006 and p=0.002, respectively). Conclusions Alterations in the mismatch repair proteins MSH2 and MLH1 and the direct repair protein MGMT may result from tumor development and/or progression. Further studies are recommended to draw definite conclusions on the clinical significance of DNA repair proteins in thyroid neoplasia.
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Affiliation(s)
- Constantinos Giaginis
- Department of Forensic Medicine and Toxicology, Medical School, University of Athens, Athens, Greece
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42
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Marimuthu A, O’Meally RN, Chaerkady R, Subbannayya Y, Nanjappa V, Kumar P, Kelkar DS, Pinto SM, Sharma R, Renuse S, Goel R, Christopher R, Delanghe B, Cole RN, Harsha H, Pandey A. A comprehensive map of the human urinary proteome. J Proteome Res 2011; 10:2734-43. [PMID: 21500864 PMCID: PMC4213861 DOI: 10.1021/pr2003038] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The study of the human urinary proteome has the potential to offer significant insights into normal physiology as well as disease pathology. The information obtained from such studies could be applied to the diagnosis of various diseases. The high sensitivity, resolution, and mass accuracy of the latest generation of mass spectrometers provides an opportunity to accurately catalog the proteins present in human urine, including those present at low levels. To this end, we carried out a comprehensive analysis of human urinary proteome from healthy individuals using high-resolution Fourier transform mass spectrometry. Importantly, we used the Orbitrap for detecting ions in both MS (resolution 60 000) and MS/MS (resolution 15 000) modes. To increase the depth of our analysis, we characterized both unfractionated as well as lectin-enriched proteins in our experiments. In all, we identified 1,823 proteins with less than 1% false discovery rate, of which 671 proteins have not previously been reported as constituents of human urine. This data set should serve as a comprehensive reference list for future studies aimed at identification and characterization of urinary biomarkers for various diseases.
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Affiliation(s)
- Arivusudar Marimuthu
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
- Manipal University, Manipal 576104, Karnataka, India
| | - Robert N. O’Meally
- Mass Spectrometry and Proteomics Facility, Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
| | - Raghothama Chaerkady
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
| | - Yashwanth Subbannayya
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
- Rajiv Gandhi University of Health Sciences, Bangalore 560041, Karnataka, India
| | - Vishalakshi Nanjappa
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
| | - Praveen Kumar
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
| | - Dhanashree S. Kelkar
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
- School of Biotechnology, Amrita University, Kollam 690525, Kerala, India
| | - Sneha M. Pinto
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
| | - Rakesh Sharma
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
- Department of Neurochemistry, National Institute of Mental Health and Neuro Sciences, Bangalore 560006, Karnataka, India
| | - Santosh Renuse
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
- School of Biotechnology, Amrita University, Kollam 690525, Kerala, India
| | - Renu Goel
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
- Department of Biotechnology, Kuvempu University, Shimoga 577451, Karnataka, India
| | - Rita Christopher
- Department of Neurochemistry, National Institute of Mental Health and Neuro Sciences, Bangalore 560006, Karnataka, India
| | | | - Robert N. Cole
- Mass Spectrometry and Proteomics Facility, Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
| | - H.C. Harsha
- Institute of Bioinformatics, International Technology Park, Bangalore 560066, Karnataka, India
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore 21205, Maryland, United States
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Promoted cancer growth by stimulating cell proliferation and decreasing apoptosis using a lentivirus-based EphB2 RNAi in pancreatic carcinoma CFPAC-1 cells. Biomed Pharmacother 2011; 65:123-31. [DOI: 10.1016/j.biopha.2010.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 12/07/2010] [Indexed: 12/22/2022] Open
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Dries JL, Kent SD, Virag JAI. Intramyocardial administration of chimeric ephrinA1-Fc promotes tissue salvage following myocardial infarction in mice. J Physiol 2011; 589:1725-40. [PMID: 21282286 DOI: 10.1113/jphysiol.2010.202366] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The purpose of this study was to investigate the role of intramyocardial administration of chimeric ephrinA1-Fc in modulating the extent of injury and inflammation in non reperfused myocardial infarction (MI). Our results show that intramyocardial injection of 6 μg ephrinA1-Fc into the border zone immediately after permanent coronary artery ligation in B6129s mice resulted in 50% reduction of infarct size, 64% less necrosis, 35% less chamber dilatation and 32% less left ventricular free wall thinning at 4 days post-MI. In the infarct zone, Ly6G+ neutrophil density was 57% reduced and CD45+ leukocyte density was 21% reduced. Myocyte damage was also reduced in ephrinA1-Fc-treated hearts, as evidenced by 54% reduced serum cardiac troponin I. Further, we observed decreased cleaved PARP, increased BAG-1 protein expression, increased phosphorylated AKT/total AKT protein, and reduced NF-κB protein with ephrinA1-Fc administration, indicating improved cellular survival. Of the eight EphA receptors known to be expressed in mice (A1–A8), RT-PCR revealed that A1–A4, A6 and A7 were expressed in the uninjured adult myocardium. Expression of EphA1–A3 and EphA7 were significantly increased following MI while EphA6 expression decreased. Treatment with ephrinA1-Fc further increased EphA1 and EphA2 gene expression and resulted in a 2-fold increase in EphA4. Upregulation and combinatorial activation of these receptors may promote tissue survival. We have identified a novel, beneficial role for ephrinA1-Fc administration at the time of MI, and propose this as a promising new target for infarct salvage in non reperfused MI. More experiments are in progress to identify receptor-expressing cell types as well as the functional implications of receptor activation.
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Affiliation(s)
- Jessica L Dries
- Department of Physiology, Brody School of Medicine, East Carolina University, 600 Moye Blvd, Greenville, NC 27834, USA
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Theocharis S, Klijanienko J, Giaginis C, Rodriguez J, Jouffroy T, Girod A, Point D, Tsourouflis G, Sastre-Garau X. Expression of DNA repair proteins, MSH2, MLH1 and MGMT in mobile tongue squamous cell carcinoma: associations with clinicopathological parameters and patients' survival. J Oral Pathol Med 2010; 40:218-26. [PMID: 21029181 DOI: 10.1111/j.1600-0714.2010.00945.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND DNA repair is a major defense mechanism, which contributes to the maintenance of genetic sequence, minimizing cell death, mutation rates, replication errors, DNA damage persistence and genomic instability. Alterations of proteins participating in DNA repair mechanisms have been associated with several aspects of cancer biology. The present study aimed to evaluate the clinical significance of DNA repair proteins, MSH2, MLH1 and MGMT in mobile tongue squamous cell carcinoma (SCC). METHODS MSH2, MLH1 and MGMT protein expression was assessed immunohistochemically on 49 mobile tongue SCC tissue samples and was analyzed in relation with clinicopathological characteristics, overall and disease-free patients' survival. RESULTS MSH2 expression was significantly associated with depth of invasion (P=0.0335), tumor shape (P=0.0396) and muscular invasion (P=0.0098). MLH1 expression was significantly associated with lymph node metastases (P=0.0484) and borderline with perineural invasion (P=0.0699). MGMT expression was significantly associated with depth of invasion (P=0.0472), tumor shape (P=0.0187), perineural invasion (P=0.0115) and lymph node metastases (P=0.0032) and borderline with vascular invasion (P=0.0755). MSH2 expression was significantly associated with disease-free patients' survival in univariate analysis (P=0.0441), being also identified as an independent prognostic factor in multivariate analysis (P=0.0451). CONCLUSIONS The present study supported evidence for possible implication of MSH2, MLH1 and MGMT proteins in the formation and progression of mobile tongue SCC.
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