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Listik E, Xavier EG, Silva Pinhal MAD, Toma L. Dermatan sulfate epimerase 1 expression and mislocalization may interfere with dermatan sulfate synthesis and breast cancer cell growth. Carbohydr Res 2020; 488:107906. [PMID: 31972438 DOI: 10.1016/j.carres.2020.107906] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 12/10/2019] [Accepted: 01/03/2020] [Indexed: 11/18/2022]
Abstract
Dermatan sulfate (DS) is a glycosaminoglycan (GAG) that is produced through the epimerization of the glucuronic acid on chondroitin sulfate into iduronic acid (IduA) by dermatan sulfate epimerase (DS-epi) 1 and 2. Proteoglycans (PGs) play essential physiological and pathological roles during cellular development, proliferation, differentiation, and cancer metastasis. DS proteoglycans play vital roles during the process of tumorigenesis, due to the increased flexibility of the polysaccharide chain in the presence of IduA residues, which facilitate specific interactions with proteins, such as growth factors, cytokines, and angiogenic factors. Furthermore, DS-epi is highly expressed in many tumors, especially in esophageal squamous cell carcinoma. This study aimed to investigate the expression of DS-epi1 in multiple breast cancer cell lines, including MCF7 (luminal A), MDA-MB-231 (triple-negative) and SKBR3 (human epidermal growth factor receptor 2-positive), and its involvement in cancer progression. A SKBR3 variant, SKBR3m, presented the most erratic cell growth pattern when compared with those for MCF7 and MDA-MB-231. Moreover, SKBR3m cells demonstrated the highest level of DS-epi1 gene expression and higher 35S-DS content. However, at the protein level, MCF7 cells displayed the highest protein level for DS-epi1, whereas MDA-MB-231 cells had the lowest level. DS-epi1 was found in vesicles and in the perinuclear compartment only in SKBR3m cells, suggesting localization in the Golgi apparatus in these cells, in contrast with the cytoplasmic localization observed in MCF7 and MDA-MB-231 cells. The cytoplasm location of DS-epi1 likely compromised the formation of DS chains, but the core protein was detected using a decorin antibody. Golgi-specific labeling confirmed the localization of DS-epi1 in SKBR3m cells at the Golgi apparatus, indicating that the location of the enzyme was a determinant for the synthesis of DS in this cell line, suggesting that DS may play a decisive role in the tumor growth observed in this breast cancer cell line.
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Affiliation(s)
- Eduardo Listik
- Department of Biochemistry, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, Brazil, CEP: 04044-020.
| | - Everton Galvão Xavier
- Department of Biochemistry, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, Brazil, CEP: 04044-020.
| | - Maria Aparecida da Silva Pinhal
- Department of Biochemistry, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, Brazil, CEP: 04044-020.
| | - Leny Toma
- Department of Biochemistry, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, Brazil, CEP: 04044-020.
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Prydz K. Determinants of Glycosaminoglycan (GAG) Structure. Biomolecules 2015; 5:2003-22. [PMID: 26308067 PMCID: PMC4598785 DOI: 10.3390/biom5032003] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/17/2015] [Accepted: 08/18/2015] [Indexed: 01/05/2023] Open
Abstract
Proteoglycans (PGs) are glycosylated proteins of biological importance at cell surfaces, in the extracellular matrix, and in the circulation. PGs are produced and modified by glycosaminoglycan (GAG) chains in the secretory pathway of animal cells. The most common GAG attachment site is a serine residue followed by a glycine (-ser-gly-), from which a linker tetrasaccharide extends and may continue as a heparan sulfate, a heparin, a chondroitin sulfate, or a dermatan sulfate GAG chain. Which type of GAG chain becomes attached to the linker tetrasaccharide is influenced by the structure of the protein core, modifications occurring to the linker tetrasaccharide itself, and the biochemical environment of the Golgi apparatus, where GAG polymerization and modification by sulfation and epimerization take place. The same cell type may produce different GAG chains that vary, depending on the extent of epimerization and sulfation. However, it is not known to what extent these differences are caused by compartmental segregation of protein cores en route through the secretory pathway or by differential recruitment of modifying enzymes during synthesis of different PGs. The topic of this review is how different aspects of protein structure, cellular biochemistry, and compartmentalization may influence GAG synthesis.
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Affiliation(s)
- Kristian Prydz
- Department of Biosciences, University of Oslo, Box 1066, Blindern OSLO 0316, Norway.
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Nikolovska K, Renke JK, Jungmann O, Grobe K, Iozzo RV, Zamfir AD, Seidler DG. A decorin-deficient matrix affects skin chondroitin/dermatan sulfate levels and keratinocyte function. Matrix Biol 2014; 35:91-102. [PMID: 24447999 DOI: 10.1016/j.matbio.2014.01.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 12/11/2013] [Accepted: 01/05/2014] [Indexed: 01/06/2023]
Abstract
Decorin is a small leucine-rich proteoglycan harboring a single glycosaminoglycan chain, which, in skin, is mainly composed of dermatan sulfate (DS). Mutant mice with targeted disruption of the decorin gene (Dcn(-/-)) exhibit an abnormal collagen architecture in the dermis and reduced tensile strength, collectively leading to a skin fragility phenotype. Notably, Ehlers-Danlos patients with mutations in enzymes involved in the biosynthesis of DS display a similar phenotype, and recent studies indicate that DS is involved in growth factor binding and signaling. To determine the impact of the loss of DS-decorin in the dermis, we analyzed the glycosaminoglycan content of Dcn(-/-) and wild-type mouse skin. The total amount of chondroitin/dermatan sulfate (CS/DS) was increased in the Dcn(-/-) skin, but was overall less sulfated with a significant reduction in bisulfated ΔDiS2,X (X=4 or 6) disaccharide units, due to the reduced expression of uronyl 2-O sulfotransferase (Ust). With increasing age, sulfation declined; however, Dcn(-/-) CS/DS was constantly undersulfated vis-à-vis wild-type. Functionally, we found altered fibroblast growth factor (Fgf)-7 and -2 binding due to changes in the micro-heterogeneity of skin Dcn(-/-) CS/DS. To better delineate the role of decorin, we used a 3D Dcn(-/-) fibroblast cell culture model. We found that the CS/DS extracts of wild-type and Dcn(-/-) fibroblasts were similar to the skin sugars, and this correlated with the lack of uronyl 2-O sulfotransferase in the Dcn(-/-) fibroblasts. Moreover, Ffg7 binding to total CS/DS was attenuated in the Dcn(-/-) samples. Surprisingly, wild-type CS/DS significantly reduced the binding of Fgf7 to keratinocytes in a concentration dependent manner unlike the Dcn(-/-) CS/DS that only affected the binding at higher concentrations. Although binding to cell-surfaces was quite similar at higher concentrations, keratinocyte proliferation was differentially affected. Higher concentration of Dcn(-/-) CS/DS induced proliferation in contrast to wild-type CS/DS. 3D co-cultures of fibroblasts and keratinocytes showed that, unlike Dcn(-/-) CS/DS, wild-type CS/DS promoted differentiation of keratinocytes. Collectively, our results provide novel mechanistic explanations for the reported defects in wound healing in Dcn(-/-) mice and possibly Ehlers-Danlos patients. Moreover, the lack of decorin-derived DS and an altered CS/DS composition differentially influence keratinocyte behavior.
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Affiliation(s)
- Katerina Nikolovska
- Insitute of Physiological Chemistry and Pathobiochemistry, Waldeyerstr. 15, University Hospital Münster, University of Münster, D-48149 Münster, Germany
| | - Jana K Renke
- Insitute of Physiological Chemistry and Pathobiochemistry, Waldeyerstr. 15, University Hospital Münster, University of Münster, D-48149 Münster, Germany
| | - Oliver Jungmann
- Insitute of Physiological Chemistry and Pathobiochemistry, Waldeyerstr. 15, University Hospital Münster, University of Münster, D-48149 Münster, Germany
| | - Kay Grobe
- Insitute of Physiological Chemistry and Pathobiochemistry, Waldeyerstr. 15, University Hospital Münster, University of Münster, D-48149 Münster, Germany
| | - Renato V Iozzo
- Department of Pathology, Anatomy and Cell Biology, and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Alina D Zamfir
- Department of Chemical and Biological Sciences, "Aurel Vlaicu" University of Arad, Romania and Mass Spectrometry Laboratory, National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara, Romania
| | - Daniela G Seidler
- Insitute of Physiological Chemistry and Pathobiochemistry, Waldeyerstr. 15, University Hospital Münster, University of Münster, D-48149 Münster, Germany.
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Thelin MA, Bartolini B, Axelsson J, Gustafsson R, Tykesson E, Pera E, Oldberg Å, Maccarana M, Malmstrom A. Biological functions of iduronic acid in chondroitin/dermatan sulfate. FEBS J 2013; 280:2431-46. [PMID: 23441919 PMCID: PMC3717172 DOI: 10.1111/febs.12214] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 02/17/2013] [Accepted: 02/18/2013] [Indexed: 01/08/2023]
Abstract
The presence of iduronic acid in chondroitin/dermatan sulfate changes the properties of the polysaccharides because it generates a more flexible chain with increased binding potentials. Iduronic acid in chondroitin/dermatan sulfate influences multiple cellular properties, such as migration, proliferation, differentiation, angiogenesis and the regulation of cytokine/growth factor activities. Under pathological conditions such as wound healing, inflammation and cancer, iduronic acid has diverse regulatory functions. Iduronic acid is formed by two epimerases (i.e. dermatan sulfate epimerase 1 and 2) that have different tissue distribution and properties. The role of iduronic acid in chondroitin/dermatan sulfate is highlighted by the vast changes in connective tissue features in patients with a new type of Ehler–Danlos syndrome: adducted thumb-clubfoot syndrome. Future research aims to understand the roles of the two epimerases and their interplay with the sulfotransferases involved in chondroitin sulfate/dermatan sulfate biosynthesis. Furthermore, a better definition of chondroitin/dermatan sulfate functions using different knockout models is needed. In this review, we focus on the two enzymes responsible for iduronic acid formation, as well as the role of iduronic acid in health and disease.
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Affiliation(s)
- Martin A Thelin
- Department of Experimental Medical Science, BMC, Lund University, Sweden
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Seidler DG. The galactosaminoglycan-containing decorin and its impact on diseases. Curr Opin Struct Biol 2012; 22:578-82. [PMID: 22877511 DOI: 10.1016/j.sbi.2012.07.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 06/28/2012] [Accepted: 07/04/2012] [Indexed: 01/13/2023]
Abstract
Decorin, a member of the small leucine-rich proteoglycans, is involved in many physiological and pathological processes. Decorin functions not only as structural molecule in organizing the extracellular matrix but also as signaling molecule controlling cell growth, morphogenesis and immunity. Mutations in decorin or alterations in the post-translational modifications of the glycosaminoglycan (GAG) chain lead to connective tissue disorders such as the congenital stromal corneal dystrophy and the Ehlers-Danlos syndrome. The summarized data reveal that decorin has a large impact on biological processes also because of the complex structure of the GAG chain. The complexity of decorin also covers the binding and sequestering of growth factors and their signaling. This shows that the decorin protein and the dermatan sulfate chain of decorin have both a structural function and a signaling function. Since defects in the biosynthesis of either the protein core or the GAG chain lead to structural alterations in the extracellular matrix and changes in the protein expression profile of the cells embedded in the matrix, this review focuses on the insights of structural function of decorin and includes data about dermatan sulfate.
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Affiliation(s)
- Daniela G Seidler
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstr. 15, Münster University, UKM, Germany.
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