Bone marrow mesenchymal stromal cell-derived extracellular matrix displays altered glycosaminoglycan structure and impaired functionality in Myelodysplastic Syndromes.

Autor:	Bains AK; Medical Department I, Haematology and Cell Therapy, University of Leipzig Medical Center, Leipzig, Germany., Behrens Wu L; Department of Medicine I, University Hospital Carl Gustav Carus, Technische Universität, Dresden, Germany., Rivière J; Department of Medicine III, Hematology/Oncology, School of Medicine, Klinikum rechts der Isar, München, Technical University of Munich, Munich, Germany., Rother S; Center for Molecular Signaling Präklinisches Zentrum für Molekulare Signalverarbeitung (PZMS), Saarland University School of Medicine, Homburg, Germany., Magno V; Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Technische Universität (TU) Dresden, Dresden, Germany., Friedrichs J; Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Technische Universität (TU) Dresden, Dresden, Germany., Werner C; Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Technische Universität (TU) Dresden, Dresden, Germany., Bornhäuser M; Department of Medicine I, University Hospital Carl Gustav Carus, Technische Universität, Dresden, Germany., Götze KS; Department of Medicine III, Hematology/Oncology, School of Medicine, Klinikum rechts der Isar, München, Technical University of Munich, Munich, Germany., Cross M; Medical Department I, Haematology and Cell Therapy, University of Leipzig Medical Center, Leipzig, Germany., Platzbecker U; Medical Department I, Haematology and Cell Therapy, University of Leipzig Medical Center, Leipzig, Germany., Wobus M; Department of Medicine I, University Hospital Carl Gustav Carus, Technische Universität, Dresden, Germany.
Jazyk:	angličtina
Zdroj:	Frontiers in oncology [Front Oncol] 2022 Sep 08; Vol. 12, pp. 961473. Date of Electronic Publication: 2022 Sep 08 (Print Publication: 2022).
DOI:	10.3389/fonc.2022.961473
Abstrakt:	Myelodysplastic syndromes (MDS) comprise a heterogeneous group of hematologic malignancies characterized by clonal hematopoiesis, one or more cytopenias such as anemia, neutropenia, or thrombocytopenia, abnormal cellular maturation, and a high risk of progression to acute myeloid leukemia. The bone marrow microenvironment (BMME) in general and mesenchymal stromal cells (MSCs) in particular contribute to both the initiation and progression of MDS. However, little is known about the role of MSC-derived extracellular matrix (ECM) in this context. Therefore, we performed a comparative analysis of in vitro deposited MSC-derived ECM of different MDS subtypes and healthy controls. Atomic force microscopy analyses demonstrated that MDS ECM was significantly thicker and more compliant than those from healthy MSCs. Scanning electron microscopy showed a dense meshwork of fibrillar bundles connected by numerous smaller structures that span the distance between fibers in MDS ECM. Glycosaminoglycan (GAG) structures were detectable at high abundance in MDS ECM as white, sponge-like arrays on top of the fibrillar network. Quantification by Blyscan assay confirmed these observations, with higher concentrations of sulfated GAGs in MDS ECM. Fluorescent lectin staining with wheat germ agglutinin and peanut agglutinin demonstrated increased deposition of N -acetyl-glucosamine GAGs (hyaluronan (HA) and heparan sulfate) in low risk (LR) MDS ECM. Differential expression of N -acetyl-galactosamine GAGs (chondroitin sulfate, dermatan sulfate) was observed between LR- and high risk (HR)-MDS. Moreover, increased amounts of HA in the matrix of MSCs from LR-MDS patients were found to correlate with enhanced HA synthase 1 mRNA expression in these cells. Stimulation of mononuclear cells from healthy donors with low molecular weight HA resulted in an increased expression of various pro-inflammatory cytokines suggesting a contribution of the ECM to the inflammatory BMME typical of LR-MDS. CD34 + hematopoietic stem and progenitor cells (HSPCs) displayed an impaired differentiation potential after cultivation on MDS ECM and modified morphology accompanied by decreased integrin expression which mediate cell-matrix interaction. In summary, we provide evidence for structural alterations of the MSC-derived ECM in both LR- and HR-MDS. GAGs may play an important role in this remodeling processes during the malignant transformation which leads to the observed disturbance in the support of normal hematopoiesis. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2022 Bains, Behrens Wu, Rivière, Rother, Magno, Friedrichs, Werner, Bornhäuser, Götze, Cross, Platzbecker and Wobus.)
Databáze:	MEDLINE
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