title: Syndecan-1 regulates adipogenesis: new insights in dedifferentiated liposarcoma tumorigenesis.
abstract: Syndecan-1 (SDC1/CD138) is one of the main cell surface proteoglycans and is involved in crucial biological processes. Only a few studies have analyzed the role of SDC1 in mesenchymal tumor pathogenesis. In particular, its involvement in adipose tissue tumors has never been investigated. Dedifferentiated liposarcoma, one of the most frequent types of malignant adipose tumors, has a high potential of recurrence and metastastic evolution. Classical chemotherapy is inefficient in metastatic dedifferentiated liposarcoma and novel biological markers are needed for improving its treatment. In this study, we have analyzed the expression of SDC1 in well-differentiated/dedifferentiated liposarcomas and showed that SDC1 is highly overexpressed in dedifferentiated liposarcoma compared with normal adipose tissue and lipomas. Silencing of SDC1 in liposarcoma cells impaired cell viability and proliferation. Using the human multipotent adipose-derived stem cell model of human adipogenesis, we showed that SDC1 promotes proliferation of undifferentiated adipocyte progenitors and inhibits their adipogenic differentiation. Altogether, our results support the hypothesis that SDC1 might be involved in liposarcomagenesis. It might play a prominent role in the dedifferentiation process occurring when well-differentiated liposarcoma progress to dedifferentiated liposarcoma. Targeting SDC1 in these tumors might provide a novel therapeutic strategy.
authors.affiliation: Institute of Biology Valrose, UMR7277 CNRS/UMR1091 INSERM/University of Nice-Sophia Antipolis, 06108 Nice, France, Present address: CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, University of Nice- Sophia Antipolis, 06560 Sophia Antipolis, France.
authors.forename: Laure-Emmanuelle
authors.initials: LE
authors.lastname: Zaragosi
authors.affiliation: Department of Pathology, Nice University Hospital, 06202 Nice, France, Institute for Research on Cancer and Aging of Nice, CNRS UMR 7284/INSERM U1081, University of Nice-Sophia Antipolis, 06107 Nice, France, Laboratory of Solid Tumor Genetics, Nice University Hospital, 06107 Nice, France and.
authors.forename: Bérengère
authors.initials: B
authors.lastname: Dadone
authors.affiliation: Department of Pathology, Nice University Hospital, 06202 Nice, France, Institute for Research on Cancer and Aging of Nice, CNRS UMR 7284/INSERM U1081, University of Nice-Sophia Antipolis, 06107 Nice, France.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Michiels
authors.affiliation: Department of Pathology, Bordeaux University Hospital, 33076 Bordeaux, France.
authors.forename: Marion
authors.initials: M
authors.lastname: Marty
authors.affiliation: Institute for Research on Cancer and Aging of Nice, CNRS UMR 7284/INSERM U1081, University of Nice-Sophia Antipolis, 06107 Nice, France, Laboratory of Solid Tumor Genetics, Nice University Hospital, 06107 Nice, France and.
authors.forename: Florence
authors.initials: F
authors.lastname: Pedeutour
authors.affiliation: Institute of Biology Valrose, UMR7277 CNRS/UMR1091 INSERM/University of Nice-Sophia Antipolis, 06108 Nice, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Dani
authors.affiliation: Institute for Research on Cancer and Aging of Nice, CNRS UMR 7284/INSERM U1081, University of Nice-Sophia Antipolis, 06107 Nice, France, laurence.bianchini@unice.fr.
authors.forename: Laurence
authors.initials: L
authors.lastname: Bianchini
mesh_terms: D050156:Adipogenesis; D000273:Adipose Tissue / Q000378:metabolism / Q000473:pathology*; D015153:Blotting, Western; D002454:Cell Differentiation; D049109:Cell Proliferation; D002471:Cell Transformation, Neoplastic / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D002478:Cells, Cultured; D005434:Flow Cytometry; D006801:Humans; D007124:Immunoenzyme Techniques; D008080:Liposarcoma / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D012333:RNA, Messenger / Q000235:genetics; D034741:RNA, Small Interfering / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013234:Stem Cells / Q000378:metabolism / Q000473:pathology; D053668:Syndecan-1 / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*
chemical_list: D012333:RNA, Messenger; D034741:RNA, Small Interfering; C508241:SDC1 protein, human; D053668:Syndecan-1