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Ricard-Blum S, Couchman JR. Conformations, interactions and functions of intrinsically disordered syndecans. Biochem Soc Trans 2023:BST20221085. [PMID: 37334846 DOI: 10.1042/bst20221085] [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: 02/19/2023] [Revised: 06/03/2023] [Accepted: 06/07/2023] [Indexed: 06/21/2023]
Abstract
Syndecans are transmembrane heparan sulfate proteoglycans present on most mammalian cell surfaces. They have a long evolutionary history, a single syndecan gene being expressed in bilaterian invertebrates. Syndecans have attracted interest because of their potential roles in development and disease, including vascular diseases, inflammation and various cancers. Recent structural data is providing important insights into their functions, which are complex, involving both intrinsic signaling through cytoplasmic binding partners and co-operative mechanisms where syndecans form a signaling nexus with other receptors such as integrins and tyrosine kinase growth factor receptors. While the cytoplasmic domain of syndecan-4 has a well-defined dimeric structure, the syndecan ectodomains are intrinsically disordered, which is linked to a capacity to interact with multiple partners. However, it remains to fully establish the impact of glycanation and partner proteins on syndecan core protein conformations. Genetic models indicate that a conserved property of syndecans links the cytoskeleton to calcium channels of the transient receptor potential class, compatible with roles as mechanosensors. In turn, syndecans influence actin cytoskeleton organization to impact motility, adhesion and the extracellular matrix environment. Syndecan clustering with other cell surface receptors into signaling microdomains has relevance to tissue differentiation in development, for example in stem cells, but also in disease where syndecan expression can be markedly up-regulated. Since syndecans have potential as diagnostic and prognostic markers as well as possible targets in some forms of cancer, it remains important to unravel structure/function relationships in the four mammalian syndecans.
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Affiliation(s)
- Sylvie Ricard-Blum
- ICBMS, UMR 5246 CNRS, Universite Claude Bernard Lyon 1, F-69622 Villeurbanne, France
| | - John R Couchman
- Biotech Research & Innovation Center, University of Copenhagen, 2200 Copenhagen, Denmark
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Revisiting the Syndecans: Master Signaling Regulators with Prognostic and Targetable Therapeutic Values in Breast Carcinoma. Cancers (Basel) 2023; 15:cancers15061794. [PMID: 36980680 PMCID: PMC10046401 DOI: 10.3390/cancers15061794] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/10/2023] [Accepted: 03/13/2023] [Indexed: 03/18/2023] Open
Abstract
Syndecans (SDC1 to 4), a family of cell surface heparan sulfate proteoglycans, are frequently expressed in mammalian tissues. SDCs are aberrantly expressed either on tumor or stromal cells, influencing cancer initiation and progression through their pleiotropic role in different signaling pathways relevant to proliferation, cell-matrix adhesion, migration, invasion, metastasis, cancer stemness, and angiogenesis. In this review, we discuss the key roles of SDCs in the pathogenesis of breast cancer, the most common malignancy in females worldwide, focusing on the prognostic significance and molecular regulators of SDC expression and localization in either breast tumor tissue or its microenvironmental cells and the SDC-dependent epithelial–mesenchymal transition program. This review also highlights the molecular mechanisms underlying the roles of SDCs in regulating breast cancer cell behavior via modulation of nuclear hormone receptor signaling, microRNA expression, and exosome biogenesis and functions, as well as summarizing the potential of SDCs as promising candidate targets for therapeutic strategies against breast cancer.
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Espinoza-Sanchez NA, Troschel F, Greve B, Götte M. Proteoglycan Expression Studied by MicroRNAs. Methods Mol Biol 2023; 2619:273-292. [PMID: 36662477 DOI: 10.1007/978-1-0716-2946-8_20] [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] [Indexed: 01/21/2023]
Abstract
MicroRNAs are small noncoding RNAs that regulate gene expression at the posttranscriptional level. Proteoglycans are glycoproteins characterized by covalent attachment of a glycosaminoglycan chain, which have been identified as regulatory targets of microRNAs in a physiological and pathophysiological context. We present a strategy and detailed methods for the functional analysis of microRNA regulation of proteoglycans using human cancer cells as an application example. The experimental setup includes in silico microRNA target prediction, transfection of cancer cells with microRNA precursors, validation of target regulation by qPCR, flow cytometry and luciferase reporter assays, and an example for functional analysis and phenotype confirmation by complementation analysis.
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Affiliation(s)
- Nancy Adriana Espinoza-Sanchez
- Department of Gynecology and Obstetrics, Münster University Hospital, Muenster, Germany
- Department of Radiotherapy-Radiooncology, Münster University Hospital, Muenster, Germany
| | - Fabian Troschel
- Department of Radiotherapy-Radiooncology, Münster University Hospital, Muenster, Germany
| | - Burkhard Greve
- Department of Radiotherapy-Radiooncology, Münster University Hospital, Muenster, Germany
| | - Martin Götte
- Department of Gynecology and Obstetrics, Münster University Hospital, Muenster, Germany.
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Kyriakopoulou K, Piperigkou Z, Tzaferi K, Karamanos NK. Trends in extracellular matrix biology. Mol Biol Rep 2023; 50:853-863. [PMID: 36342580 PMCID: PMC9884264 DOI: 10.1007/s11033-022-07931-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 09/06/2022] [Indexed: 11/09/2022]
Abstract
Extracellular matrixes (ECMs) are intricate 3-dimensional macromolecular networks of unique architectures with regulatory roles in cell morphology and functionality. As a dynamic native biomaterial, ECM undergoes constant but tightly controlled remodeling that is crucial for the maintenance of normal cellular behavior. Under pathological conditions like cancer, ECM remodeling ceases to be subjected to control resulting in disease initiation and progression. ECM is comprised of a staggering number of molecules that interact not only with one another, but also with neighboring cells via cell surface receptors. Such interactions, too many to tally, are of paramount importance for the identification of novel disease biomarkers and more personalized therapeutic intervention. Recent advances in big data analytics have allowed the development of online databases where researchers can take advantage of a stochastic evaluation of all the possible interactions and narrow them down to only those of interest for their study, respectively. This novel approach addresses the limitations that currently exist in studies, expands our understanding on ECM interactions, and has the potential to advance the development of targeted therapies. In this article we present the current trends in ECM biology research and highlight its importance in tissue integrity, the main interaction networks, ECM-mediated cell functional properties and issues related to pharmacological targeting.
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Affiliation(s)
- Konstantina Kyriakopoulou
- Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, 265 04, Patras, Greece
| | - Zoi Piperigkou
- Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, 265 04, Patras, Greece
- Foundation for Research and Technology-Hellas (FORTH), Institute of Chemical Engineering Sciences (ICE-HT), 261 10, Patras, Greece
| | - Kyriaki Tzaferi
- Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, 265 04, Patras, Greece
| | - Nikos K Karamanos
- Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, 265 04, Patras, Greece.
- Foundation for Research and Technology-Hellas (FORTH), Institute of Chemical Engineering Sciences (ICE-HT), 261 10, Patras, Greece.
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5
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Piperigkou Z, Karamanos NK. Evaluating the Effects of MicroRNAs on Proteoglycans and Matrix Constituents' Expression and Functional Properties. Methods Mol Biol 2023; 2619:257-271. [PMID: 36662476 DOI: 10.1007/978-1-0716-2946-8_19] [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] [Indexed: 01/21/2023]
Abstract
Circulating microRNAs (miRNAs) possess significant roles in normal homeostasis and disease conditions, including cardiovascular diseases, fibrosis, inflammatory response, and cancer. Secreted miRNAs, via the membrane vesicles, actively communicate with extracellular matrix (ECM) components to affect cell-cell and cell-matrix interactions, thereby affecting matrix remodeling and metabolic pathways in the recipient cells. Matrix macromolecules regulate the expression of miRNAs, and in turn miRNAs have been identified as emerging mediators of matrix constituents, serving as appealing biomarkers for many pathophysiological processes. Therefore, the expression profile of certain miRNAs highlights the importance of their targeting in several aspects of human pathologies. In this chapter, we report molecular biology protocols to determine the effects of selected miRNAs on the expression and activity of matrix biomolecules.
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Affiliation(s)
- Zoi Piperigkou
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece.
- Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Patras, Greece.
| | - Nikos K Karamanos
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece.
- Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Patras, Greece.
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Karamanos NK, Götte M, Passi A. Editorial: Molecules of the extracellular matrix as cancer targets. Front Oncol 2022; 12:1034646. [PMID: 36203416 PMCID: PMC9530891 DOI: 10.3389/fonc.2022.1034646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 09/09/2022] [Indexed: 11/18/2022] Open
Affiliation(s)
- Nikos K. Karamanos
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Res. Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece
- *Correspondence: Nikos K. Karamanos,
| | - Martin Götte
- Department of Gynecology and Obstetrics, Münster University Hospital, Münster, Germany
| | - Alberto Passi
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
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Piperigkou Z, Koutsandreas A, Franchi M, Zolota V, Kletsas D, Passi A, Karamanos NK. ESR2 Drives Mesenchymal-to-Epithelial Transition in Triple-Negative Breast Cancer and Tumorigenesis In Vivo. Front Oncol 2022; 12:917633. [PMID: 35719919 PMCID: PMC9203970 DOI: 10.3389/fonc.2022.917633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 05/09/2022] [Indexed: 11/21/2022] Open
Abstract
Estrogen receptors (ERs) have pivotal roles in the development and progression of triple-negative breast cancer (TNBC). Interactions among cancer cells and tumor microenvironment are orchestrated by the extracellular matrix that is rapidly emerging as prominent contributor of fundamental processes of breast cancer progression. Early studies have correlated ERβ expression in tumor sites with a more aggressive clinical outcome, however ERβ exact role in the progression of TNBC remains to be elucidated. Herein, we introduce the functional role of ERβ suppression following isolation of monoclonal cell populations of MDA-MB-231 breast cancer cells transfected with shRNA against human ESR2 that permanently resulted in 90% reduction of ERβ mRNA and protein levels. Further, we demonstrate that clone selection results in strongly reduced levels of the aggressive functional properties of MDA-MB-231 cells, by transforming their morphological characteristics, eliminating the mesenchymal-like traits of triple-negative breast cancer cells. Monoclonal populations of shERβ MDA-MB-231 cells undergo universal matrix reorganization and pass on a mesenchymal-to-epithelial transition state. These striking changes are encompassed by the total prevention of tumorigenesis in vivo following ERβ maximum suppression and isolation of monoclonal cell populations in TNBC cells. We propose that these novel findings highlight the promising role of ERβ targeting in future pharmaceutical approaches for managing the metastatic dynamics of TNBC breast cancer.
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Affiliation(s)
- Zoi Piperigkou
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece.,Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Patras, Greece
| | - Anastasios Koutsandreas
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece
| | - Marco Franchi
- Department for Life Quality Study, University of Bologna, Rimini, Italy
| | - Vasiliki Zolota
- Department of Pathology, School of Medicine, University of Patras, Patras, Greece
| | - Dimitrios Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biology, National Centre for Scientific Research (N.C.S.R). "Demokritos", Athens, Greece
| | - Alberto Passi
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Nikos K Karamanos
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece.,Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Patras, Greece
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