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Vidal-Calvo EE, Martin-Salazar A, Choudhary S, Dagil R, Raghavan SSR, Duvnjak L, Nordmaj MA, Clausen TM, Skafte A, Oberkofler J, Wang K, Agerbæk MØ, Løppke C, Jørgensen AM, Ropac D, Mujollari J, Willis S, Garcias López A, Miller RL, Karlsson RTG, Goerdeler F, Chen YH, Colaço AR, Wang Y, Lavstsen T, Martowicz A, Nelepcu I, Marzban M, Oo HZ, Ørum-Madsen MS, Wang Y, Nielsen MA, Clausen H, Wierer M, Wolf D, Gögenur I, Theander TG, Al-Nakouzi N, Gustavsson T, Daugaard M, Salanti A. Tumor-agnostic cancer therapy using antibodies targeting oncofetal chondroitin sulfate. Nat Commun 2024; 15:7553. [PMID: 39215044 PMCID: PMC11364678 DOI: 10.1038/s41467-024-51781-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 08/16/2024] [Indexed: 09/04/2024] Open
Abstract
Molecular similarities between embryonic and malignant cells can be exploited to target tumors through specific signatures absent in healthy adult tissues. One such embryonic signature tumors express is oncofetal chondroitin sulfate (ofCS), which supports disease progression and dissemination in cancer. Here, we report the identification and characterization of phage display-derived antibody fragments recognizing two distinct ofCS epitopes. These antibody fragments show binding affinity to ofCS in the low nanomolar range across a broad selection of solid tumor types in vitro and in vivo with minimal binding to normal, inflamed, or benign tumor tissues. Anti-ofCS antibody drug conjugates and bispecific immune cell engagers based on these targeting moieties disrupt tumor progression in animal models of human and murine cancers. Thus, anti-ofCS antibody fragments hold promise for the development of broadly effective therapeutic and diagnostic applications targeting human malignancies.
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Affiliation(s)
- Elena Ethel Vidal-Calvo
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark.
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark.
| | - Anne Martin-Salazar
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Swati Choudhary
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
| | - Robert Dagil
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
| | - Sai Sundar Rajan Raghavan
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Lara Duvnjak
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
| | - Mie Anemone Nordmaj
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | | | - Ann Skafte
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
| | - Jan Oberkofler
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Kaituo Wang
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mette Ø Agerbæk
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VARCT Diagnostics, Copenhagen, Denmark
| | - Caroline Løppke
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Amalie Mundt Jørgensen
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VARCT Diagnostics, Copenhagen, Denmark
| | - Daria Ropac
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Joana Mujollari
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Shona Willis
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Agnès Garcias López
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Rebecca Louise Miller
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Richard Torbjörn Gustav Karlsson
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Felix Goerdeler
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Ana R Colaço
- Proteomics Research Infrastructure, University of Copenhagen, Copenhagen, Denmark
| | - Yong Wang
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Thomas Lavstsen
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
| | - Agnieszka Martowicz
- Department of Internal Medicine V, Haematology & Oncology, Comprehensive Cancer Center Innsbruck (CCCI) and Tyrolean Cancer Research Institute (TKFI), Medical University of Innsbruck, Innsbruck, Austria
| | - Irina Nelepcu
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institutes, Vancouver, BC, Canada
- Department of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Mona Marzban
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institutes, Vancouver, BC, Canada
- Department of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Htoo Zarni Oo
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institutes, Vancouver, BC, Canada
- Department of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Maj Sofie Ørum-Madsen
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institutes, Vancouver, BC, Canada
- Department of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Yuzhuo Wang
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institutes, Vancouver, BC, Canada
| | - Morten A Nielsen
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
| | - Henrik Clausen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Michael Wierer
- Proteomics Research Infrastructure, University of Copenhagen, Copenhagen, Denmark
| | - Dominik Wolf
- Department of Internal Medicine V, Haematology & Oncology, Comprehensive Cancer Center Innsbruck (CCCI) and Tyrolean Cancer Research Institute (TKFI), Medical University of Innsbruck, Innsbruck, Austria
| | - Ismail Gögenur
- Center for Surgical Science, Department of Surgery, Zealand University Hospital Køge, Køge, Denmark
| | - Thor G Theander
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
| | - Nader Al-Nakouzi
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institutes, Vancouver, BC, Canada
- Department of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Tobias Gustavsson
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark
| | - Mads Daugaard
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark.
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institutes, Vancouver, BC, Canada.
- Department of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.
| | - Ali Salanti
- Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark.
- VAR2 Pharmaceuticals ApS, Copenhagen, Denmark.
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2
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Han J, Deng H, Li Y, Qiao L, Jia H, Zhang L, Wang L, Qu C. Nano-elemental selenium particle developed via supramolecular self-assembly of chondroitin sulfate A and Na 2SeO 3 to repair cartilage lesions. Carbohydr Polym 2023; 316:121047. [PMID: 37321739 DOI: 10.1016/j.carbpol.2023.121047] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/17/2023] [Accepted: 05/20/2023] [Indexed: 06/17/2023]
Abstract
Cartilage repair is a significant clinical issue due to its restricted ability to regenerate and self-heal after cartilage lesions or degenerative disease. Herein, a nano-elemental selenium particle (chondroitin sulfate A‑selenium nanoparticle, CSA-SeNP) is developed by the supramolecular self-assembly of Na2SeO3 and negatively charged chondroitin sulfate A (CSA) via electrostatic interactions or hydrogen bonds followed by in-situ reducing of l-ascorbic acid for cartilage lesions repair. The constructed micelle exhibits a hydrodynamic particle size of 171.50 ± 2.40 nm and an exceptionally high selenium loading capacity (9.05 ± 0.03 %) and can promote chondrocyte proliferation, increase cartilage thickness, and improve the ultrastructure of chondrocytes and organelles. It mainly enhances the sulfation modification of chondroitin sulfate by up-regulating the expression of chondroitin sulfate 4-O sulfotransferase-1, -2, -3, which in turn promotes the expression of aggrecan to repair articular and epiphyseal-plate cartilage lesions. The micelles combine the bio-activity of CSA with selenium nanoparticles (SeNPs), which are less toxic than Na2SeO3, and low doses of CSA-SeNP are even superior to inorganic selenium in repairing cartilage lesions in rats. Thus, the developed CSA-SeNP is anticipated to be a promising selenium supplementation preparation in clinical application to address the difficulty of healing cartilage lesions with outstanding repair effects.
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Affiliation(s)
- Jing Han
- Department of Occupational and Environmental Health, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China; Global Health Institute, Health Science Center, Xi'an Jiaotong University, Xi'an, China; Key Laboratory of Environment and Genes Related to Diseases, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China.
| | - Huan Deng
- Department of Occupational and Environmental Health, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China; Global Health Institute, Health Science Center, Xi'an Jiaotong University, Xi'an, China.
| | - Yang Li
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China.
| | - Lichun Qiao
- Department of Occupational and Environmental Health, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China; Global Health Institute, Health Science Center, Xi'an Jiaotong University, Xi'an, China.
| | - Hongrui Jia
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, China.
| | - Lan Zhang
- State-key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China.
| | - Linghang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, China.
| | - Chengjuan Qu
- Department of Odontology, Umeå University, Umeå, Sweden.
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Zhou Q, Chen Y, Chen Z, Wang L, Ma X, Wang J, Zhang Q, Chen S. Genomics and transcriptomics reveal new molecular mechanism of vibriosis resistance in fish. Front Immunol 2022; 13:974604. [PMID: 36304468 PMCID: PMC9592550 DOI: 10.3389/fimmu.2022.974604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 09/05/2022] [Indexed: 11/23/2022] Open
Abstract
Infectious diseases have caused dramatic production decline and economic loss for fish aquaculture. However, the poor understanding of fish disease resistance severely hampered disease prevention. Chinese tongue sole (Cynoglossus semilaevis) is an important economic flatfish suffering from vibriosis. Here we used genomic, transcriptomic and experimental approaches to investigate the molecular genetic mechanisms underlying fish vibriosis resistance. A genome-wide comparison revealed that the genes under selective sweeps were enriched for glycosaminoglycan (GAG) chondroitin sulfate (CS)/dermatan sulfate (DS) metabolism. Transcriptomic analyses prioritized synergic gene expression patterns in this pathway, which may lead to an increased CS/DS content in the resistant family. Further experimental evidence showed that carbohydrate sulfotransferases 12 (Chst12), a key enzyme for CS/DS biosynthesis, has a direct antibacterial activity. To the best of our knowledge, this is the first report that the chst12 gene has a bactericidal effect. In addition, CS/DS is a major component of the extracellular matrix (ECM) and the selection signatures and fine-tuned gene expressions of ECM-receptor interaction genes indicated a modification in the ECM structure with an enhancement of the barrier function. Furthermore, functional studies conducted on Col6a2, encoding a collagen gene which constitutes the ECM, pointed to that it may act as a cellular receptor for Vibrio pathogens, thus plays an important role for the Vibrio invasion. Taken together, these findings provide new insights into the molecular protective mechanism underlying vibriosis resistance in fish, which offers crucial genomic resources for the resistant germplasm breeding and infectious disease control in fish culturing.
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Affiliation(s)
- Qian Zhou
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
- Shandong Key Laboratory for Marine Fishery Biotechnology and Genetic Breeding, Qingdao, China
| | - Yadong Chen
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
| | - Zhangfan Chen
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
| | - Lei Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
| | - Xinran Ma
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
| | - Jie Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
| | - Qihao Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
| | - Songlin Chen
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
- Shandong Key Laboratory for Marine Fishery Biotechnology and Genetic Breeding, Qingdao, China
- College of Life Science, Qingdao University, Qingdao, China
- *Correspondence: Songlin Chen,
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Wang L, Yin J, Yang B, Qu C, Lei J, Han J, Guo X. Serious Selenium Deficiency in the Serum of Patients with Kashin-Beck Disease and the Effect of Nano-Selenium on Their Chondrocytes. Biol Trace Elem Res 2020; 194:96-104. [PMID: 31175635 DOI: 10.1007/s12011-019-01759-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/22/2019] [Indexed: 01/12/2023]
Abstract
To investigate selenium (Se) concentrations in serum of patients with rheumatoid arthritis (RA), osteoarthritis (OA), and Kashin-Beck disease (KBD), together with the effect of Se supplement (chondroitin sulfate [CS] nano-Se [SeCS]) on CS structure-modifying sulfotransferases in KBD chondrocyte. Fifty serum samples from each group with aged-matched (40-60 years), normal control (N), RA, OA, and KBD (25 males and females, respectively) were collected to determine Se concentrations. Furthermore, the KBD chondrocytes were divided into two groups following the intervention for 24 h: (a) non-treated KBD group and (b) SeCS-treated KBD group (100 ng/mL SeCS). The ultrastructural changes in chondrocytes were observed by transmission electron microscopy (TEM). Live/dead staining was used to observe cell viability. The expression of CS-modifying sulfotransferases including carbohydrate sulfotransferase 12, 13, and 15 (CHST-12, CHST-13, and CHST-15, respectively), and uronyl 2-O-sulfotransferase (UST) were examined by quantitative real-time polymerase chain reaction and western blotting analysis after SeCS intervention. The Se concentrations in serum of KBD, OA, and RA patients were lower than those in control. In OA, RA, and control, Se concentrations were higher in male than in female, while it is opposite in KBD. In the cell experiment, cell survival rate and mitochondrial density were increased in SeCS-treated KBD groups. Expressions of CHST-15, or CHST-12, and CHST-15 on the mRNA or protein level were significantly increased. Expression of UST slightly increased on the mRNA level, but no change was visible on the protein level. Se deficiency in serum of RA, OA, and KBD was observed. SeCS supplemented in KBD chondrocytes improved their survival rate, ameliorated their ultrastructure, and increased the expression of CS structure-modifying sulfotransferases.
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Affiliation(s)
- Liyun Wang
- School of Public Health, Health Science Center, Key Laboratory of Environment and Gene Related Diseases of Ministry Education, Key Laboratory of Trace Elements and Endemic Diseases, Ministry of Health, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
- Shenzhen Institute, Xi'an Jiaotong University, Shenzhen, 518057, Guangzhou, People's Republic of China
| | - Jiafeng Yin
- Department of Laboratory Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shaanxi, China
| | - Bo Yang
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Chengjuan Qu
- Department of Integrative Medical Biology, Umeå University, 90187, Umeå, Sweden
| | - Jian Lei
- School of Public Health, Health Science Center, Key Laboratory of Environment and Gene Related Diseases of Ministry Education, Key Laboratory of Trace Elements and Endemic Diseases, Ministry of Health, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
- Shenzhen Institute, Xi'an Jiaotong University, Shenzhen, 518057, Guangzhou, People's Republic of China
| | - Jing Han
- School of Public Health, Health Science Center, Key Laboratory of Environment and Gene Related Diseases of Ministry Education, Key Laboratory of Trace Elements and Endemic Diseases, Ministry of Health, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.
- Shenzhen Institute, Xi'an Jiaotong University, Shenzhen, 518057, Guangzhou, People's Republic of China.
| | - Xiong Guo
- School of Public Health, Health Science Center, Key Laboratory of Environment and Gene Related Diseases of Ministry Education, Key Laboratory of Trace Elements and Endemic Diseases, Ministry of Health, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
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Lei J, Yan S, Zhou Y, Wang L, Zhang J, Guo X, Lammi MJ, Han J, Qu C. Abnormal expression of chondroitin sulfate sulfotransferases in the articular cartilage of pediatric patients with Kashin-Beck disease. Histochem Cell Biol 2020; 153:153-164. [PMID: 31845005 DOI: 10.1007/s00418-019-01833-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2019] [Indexed: 12/31/2022]
Abstract
The objective of this study is to investigate the expression of enzymes involved in the sulfation of articular cartilage from proximal metacarpophalangeal (PMC) joint cartilage and distal metacarpophalangeal (DMC) joint cartilage in children with Kashin-Beck disease (KBD). The finger cartilage samples of PMC and DMC were collected from KBD and normal children aged 5-14 years old. Hematoxylin and eosin staining as well as immunohistochemical staining were used to observe the morphology and quantitate the expression of carbohydrate sulfotransferase 3 (CHST-3), carbohydrate sulfotransferase 12 (CHST-12), carbohydrate sulfotransferase 13 (CHST-13), uronyl 2-O-sulfotransferase (UST), and aggrecan. In the results, the numbers of chondrocyte decreased in all three zones of PMC and DMC in the KBD group. Less positive staining cells for CHST-3, CHST-12, CHST-13, UST, and aggrecan were observed in almost all three zones of PMC and DMC in KBD. The positive staining cell rates of CHST-12 were higher in superficial and middle zones of PMC and DMC in KBD, and a significantly higher rate of CHST-13 was observed only in superficial zone of PMC in KBD. In conclusion, the abnormal expression of chondroitin sulfate sulfotransferases in chondrocytes of KBD children may provide an explanation for the cartilage damage, and provide therapeutic targets for the treatment.
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Affiliation(s)
- Jian Lei
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, P. R. China
| | - Siqi Yan
- Shenzhen Institute, Xi'an Jiaotong University, Shenzhen, 518057, P. R. China
- Department of Ophthalmology, The First Affiliated Hospital, Health Science Center of Xi'an Jiaotong University, Xi'an, 710061, P. R. China
| | - Yuan Zhou
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, P. R. China
| | - Liyun Wang
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, P. R. China
- Shenzhen Institute, Xi'an Jiaotong University, Shenzhen, 518057, P. R. China
| | - Jinghua Zhang
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, P. R. China
| | - Xiong Guo
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, P. R. China
| | - Mikko J Lammi
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, P. R. China
- Department of Integrative Medical Biology, Umeå University, 90187, Umeå, Sweden
| | - Jing Han
- Shenzhen Institute, Xi'an Jiaotong University, Shenzhen, 518057, P. R. China.
| | - Chengjuan Qu
- Department of Integrative Medical Biology, Umeå University, 90187, Umeå, Sweden
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7
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Guo Y, Zhou Y, Yan S, Qu C, Wang L, Guo X, Han J. Decreased Expression of CHST-12, CHST-13, and UST in the Proximal Interphalangeal Joint Cartilage of School-Age Children with Kashin-Beck Disease: an Endemic Osteoarthritis in China Caused by Selenium Deficiency. Biol Trace Elem Res 2019; 191:276-285. [PMID: 30661165 DOI: 10.1007/s12011-019-1642-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/14/2019] [Indexed: 01/06/2023]
Abstract
The objective of this study is to investigate changes in the expression of enzymes involved in chondroitin sulfate (CS) sulfation in distal articular surface of proximal interphalangeal joint isolated from school-age children patients with Kashin-Beck disease (KBD), using normal children as controls. Articular cartilage samples were collected from four normal and four KBD children (7-12 years old), and these children were assigned to control and KBD groups. Hematoxylin and eosin (H&E), toluidine blue (TB), and immunohistochemical (IHC) stainings were utilized to evaluate changes in joint pathology and expression of enzymes involved in CS sulfation, including carbohydrate sulfotransferase 12 (CHST-12), carbohydrate sulfotransferase 13 (CHST-13), and uronyl 2-O-sulfotransferase (UST). The correspondence results were examined by semi-quantitative analysis. Compared with the control group, the KBD group showed the following: a significant decrease of total chondrocytes in superficial, middle, and deep layers and deposition of sulfated glycosaminoglycans in extracellular matrix of KBD cartilage were observed; positive staining chondrocytes of CHST-12, CHST-13, and UST were significantly less in superficial zone of KBD cartilage; and CHST-13 positive staining chondrocytes was reduced in deep zone of KBD cartilage. In contrast, the positive staining rates of CHST-12, CHST-13, and UST in KBD were significantly higher than those in the control group. The decreased expression of these enzymes and the physiologic compensatory reaction may be the signs of early-stage KBD. The alterations of CS structure modifying sulfotransferases in finger articular cartilage might play an important role in the onset and pathogenesis of school-age KBD children.
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Affiliation(s)
- Yijie Guo
- Key laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Yuan Zhou
- Key laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Siqi Yan
- Department of Ophthalmology, the First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Chengjuan Qu
- Department of Integrative Medical Biology, Umeå University, 90187, Umeå, Sweden
| | - Liyun Wang
- Key laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
- College of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Xiong Guo
- Key laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Jing Han
- Key laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.
- College of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.
- Shenzhen Institute, Xi'an Jiaotong University, Shenzhen, 518057, Guangzhou, People's Republic of China.
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8
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Polyamines stimulate the CHSY1 synthesis through the unfolding of the RNA G-quadruplex at the 5'-untraslated region. Biochem J 2018; 475:3797-3812. [PMID: 30401686 DOI: 10.1042/bcj20180672] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 10/04/2018] [Accepted: 11/05/2018] [Indexed: 01/20/2023]
Abstract
Glycosaminoglycans (GAGs), a group of structurally related acidic polysaccharides, are primarily found as glycan moieties of proteoglycans (PGs). Among these, chondroitin sulfate (CS) and dermatan sulfate, side chains of PGs, are widely distributed in animal kingdom and show structural variations, such as sulfation patterns and degree of epimerization, which are responsible for their physiological functions through interactions with growth factors, chemokines and adhesion molecules. However, structural changes in CS, particularly the ratio of 4-O-sulfation to 6-O-sulfation (4S/6S) and CS chain length that occur during the aging process, are not fully understood. We found that 4S/6S ratio and molecular weight of CS were decreased in polyamine-depleted cells. In addition, decreased levels of chondroitin synthase 1 (CHSY1) and chondroitin 4-O-sulfotransferase 2 proteins were also observed on polyamine depletion. Interestingly, the translation initiation of CHSY1 was suppressed by a highly structured sequence (positions -202 to -117 relative to the initiation codon) containing RNA G-quadruplex (G4) structures in 5'-untranslated region. The formation of the G4s was influenced by the neighboring sequences to the G4s and polyamine stimulation of CHSY1 synthesis disappeared when the formation of the G4s was inhibited by site-directed mutagenesis. These results suggest that the destabilization of G4 structures by polyamines stimulates CHSY1 synthesis and, at least in part, contribute to the maturation of CS chains.
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Wang L, Guo X, Yi J, Qu C, Lei J, Guo Q, Han J. The effects of long-term low selenium diet on the expression of CHST-3, CHST-12 and UST in knee cartilage of growing rats. J Trace Elem Med Biol 2018; 50:123-129. [PMID: 30262269 DOI: 10.1016/j.jtemb.2018.06.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To investigate the effect of low selenium diet on rat´s knee cartilage and expression of chondroitin sulfate (CS) sulfated enzymes in articular and epiphyseal-plate cartilage of rats' femur and tibia. METHODS Twenty-four SD rats were randomly divided into two groups with six female and six male in each group: control group (selenium 0.18 mg/kg), and low selenium group (selenium 0.02 mg/kg). After 109 days, the rats were sacrificed. The ultrastructural changes in chondrocytes of rat knee cartilage were observed by transmission electron microscopy (TEM). The morphology and pathology changes of knee cartilage were examined by hematoxylin-eosin (HE) and toluidine blue (TB) staining. The localization and expression of enzymes involved in CS sulfation, including chondroitin 6-O-sulfotransferase 1 (CHST-3), chondroitin 4-O-sulfotransferase 2 (CHST-12) and uronyl 2-O-sulfotransferase (UST) were examined by immunohistochemical staining and semi-quantitative analysis. RESULTS In low selenium group, ultrastructural changes of chondrocytes were observed in articular cartilage of femur (AF), articular cartilage of tibia (AT), epiphyseal-plate cartilage of femur (EF) and epiphyseal-plate cartilage of tibia (ET); however, no significant changes in chondrocytes number were observed in the above AF, AT, EF or ET. Moreover, reduced thickness of cartilage layer in AF, EF and ET was detected along with reduced staining areas of sulfated glycosaminoglycan in EF and ET in low selenium group. In addition, positive staining rate of CHST-3 was lower in AF, AT and EF, while positive staining rates of CHST-12 and UST were lower in AF, AT, EF and ET in low selenium group when compared with control group. CONCLUSIONS Low selenium undermines the ultrastructure of chondrocytes, inhibits the normal development of cartilage and the expression of CS sulfated enzymes.
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Affiliation(s)
- Liyun Wang
- College of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China.
| | - Xiong Guo
- College of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China.
| | - Jianhua Yi
- College of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China.
| | - Chengjuan Qu
- Department of Integrative Medical Biology, Umeå University, Umeå, 90187, Sweden.
| | - Jian Lei
- College of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China.
| | - Qingquan Guo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, PR China.
| | - Jing Han
- College of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China.
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Tykesson E, Hassinen A, Zielinska K, Thelin MA, Frati G, Ellervik U, Westergren-Thorsson G, Malmström A, Kellokumpu S, Maccarana M. Dermatan sulfate epimerase 1 and dermatan 4- O-sulfotransferase 1 form complexes that generate long epimerized 4- O-sulfated blocks. J Biol Chem 2018; 293:13725-13735. [PMID: 29976758 DOI: 10.1074/jbc.ra118.003875] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/11/2018] [Indexed: 01/14/2023] Open
Abstract
During the biosynthesis of chondroitin/dermatan sulfate (CS/DS), a variable fraction of glucuronic acid is converted to iduronic acid through the activities of two epimerases, dermatan sulfate epimerases 1 (DS-epi1) and 2 (DS-epi2). Previous in vitro studies indicated that without association with other enzymes, DS-epi1 activity produces structures that have only a few adjacent iduronic acid units. In vivo, concomitant with epimerization, dermatan 4-O-sulfotransferase 1 (D4ST1) sulfates the GalNAc adjacent to iduronic acid. This sulfation facilitates DS-epi1 activity and enables the formation of long blocks of sulfated iduronic acid-containing domains, which can be major components of CS/DS. In this report, we used recombinant enzymes to confirm the concerted action of DS-epi1 and D4ST1. Confocal microscopy revealed that these two enzymes colocalize to the Golgi, and FRET experiments indicated that they physically interact. Furthermore, FRET, immunoprecipitation, and cross-linking experiments also revealed that DS-epi1, DS-epi2, and D4ST1 form homomers and are all part of a hetero-oligomeric complex where D4ST1 directly interacts with DS-epi1, but not with DS-epi2. The cooperation of DS-epi1 with D4ST1 may therefore explain the processive mode of the formation of iduronic acid blocks. In conclusion, the iduronic acid-forming enzymes operate in complexes, similar to other enzymes active in glycosaminoglycan biosynthesis. This knowledge shed light on regulatory mechanisms controlling the biosynthesis of the structurally diverse CS/DS molecule.
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Affiliation(s)
- Emil Tykesson
- From the Department of Experimental Medical Science, Lund University, SE-221 00, Lund, Sweden
| | - Antti Hassinen
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, 90570 Oulu, Finland.,Institute for Molecular Medicine Finland (FIMM), University of Helsinki, 00014 Helsinki, Finland, and
| | - Katarzyna Zielinska
- From the Department of Experimental Medical Science, Lund University, SE-221 00, Lund, Sweden
| | - Martin A Thelin
- From the Department of Experimental Medical Science, Lund University, SE-221 00, Lund, Sweden
| | - Giacomo Frati
- From the Department of Experimental Medical Science, Lund University, SE-221 00, Lund, Sweden
| | - Ulf Ellervik
- Department of Chemistry, Lund University, SE-221 00, Lund, Sweden
| | | | - Anders Malmström
- From the Department of Experimental Medical Science, Lund University, SE-221 00, Lund, Sweden
| | - Sakari Kellokumpu
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, 90570 Oulu, Finland
| | - Marco Maccarana
- From the Department of Experimental Medical Science, Lund University, SE-221 00, Lund, Sweden,
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Afroz R, Cao Y, Rostam MA, Ta H, Xu S, Zheng W, Osman N, Kamato D, Little PJ. Signalling pathways regulating galactosaminoglycan synthesis and structure in vascular smooth muscle: Implications for lipoprotein binding and atherosclerosis. Pharmacol Ther 2018; 187:88-97. [DOI: 10.1016/j.pharmthera.2018.02.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Ageing affects chondroitin sulfates and their synthetic enzymes in the intervertebral disc. Signal Transduct Target Ther 2017; 2:17049. [PMID: 29263929 PMCID: PMC5661628 DOI: 10.1038/sigtrans.2017.49] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 05/19/2017] [Accepted: 07/27/2017] [Indexed: 01/07/2023] Open
Abstract
The depletion of chondroitin sulfates (CSs) within the intervertebral disc (IVD) during degenerative disc disease (DDD) results in a decrease in tissue hydration, a loss of fluid movement, cell apoptosis, a loss of nerve growth inhibition and ultimately, the loss of disc function. To date, little is known with regards to the structure and content of chondroitin sulfates (CSs) during IVD ageing. The behavior of glycosaminoglycans (GAGs), specifically CSs, as well as xylosyltransferase I (XT-I) and glucuronyltransferase I (GT-I), two key enzymes involved in CS synthesis as a primer of glycosaminoglycan (GAG) chain elongation and GAG synthesis in the nucleus pulposus (NP), respectively, were evaluated in a bovine ageing IVD model. Here, we showed significant changes in the composition of GAGs during the disc ageing process (6-month-old, 2-year-old and 8-year-old IVDs representing the immature to mature skeleton). The CS quantity and composition of annulus fibrosus (AF) and NP were determined. The expression of both XT-I and GT-I was detected using immunohistochemistry. A significant decrease in GAGs was observed during the ageing process. CSs are affected at both the structural and quantitative levels with important changes in sulfation observed upon maturity, which correlated with a decrease in the expression of both XT-I and GT-I. A progressive switch of the sulfation profile was noted in both NP and AF tissues from 6 months to 8 years. These changes give an appreciation of the potential impact of CSs on the disc biology and the development of therapeutic approaches for disc regeneration and repair.
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Han J, Li D, Qu C, Wang D, Wang L, Guo X, Lammi MJ. Altered expression of chondroitin sulfate structure modifying sulfotransferases in the articular cartilage from adult osteoarthritis and Kashin-Beck disease. Osteoarthritis Cartilage 2017; 25:1372-1375. [PMID: 28274888 DOI: 10.1016/j.joca.2017.02.803] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 02/06/2017] [Accepted: 02/21/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate the expression of enzymes involved in chondroitin sulfate (CS) sulfation in the articular cartilage isolated from adult patients with osteoarthritis (OA) and Kashin-Beck disease (KBD), using normal adults as controls. METHODS Articular cartilage samples were collected from normal, OA and KBD adults aged 38-60 years old, and divided into three groups with six individual subjects in each group. The morphology and pathology grading of knee joint cartilage was examined by Safranin O staining. The localization and expression of enzymes involved in CS sulfation (CHST-3, CHST-11, CHST-12, CHST-13, carbohydrate (N-acetylgalactosamine 4-sulfate 6-O) sulfotransferase 15 - CHST-15, and uronyl 2-O-sulfotransferase - UST) were examined by immunohistochemical (IHC) staining and semi-quantitative analysis. RESULTS Positive staining rates for anabolic enzymes CHST-3, CHST-12, CHST-15, and UST were lower in the KBD and OA groups than those in the control group. Meanwhile, reduced levels of CHST-11, and CHST-13 in KBD group were observed, in contrast to those in OA and control groups. The expressions of all six CS sulfation enzymes were less detected in the superficial and deep zones of KBD cartilage compared with control and OA cartilage. CONCLUSION The reduced expression of the CS structure modifying sulfotransferases in the chondrocytes of both KBD and OA adult patients may provide explanations for their cartilage damages, and therapeutic targets for their treatment.
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Affiliation(s)
- J Han
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Biomat Lab, Department of Mechanical Engineering, National University of Singapore, 117576, Singapore.
| | - D Li
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China.
| | - C Qu
- Department of Integrative Medical Biology, Umeå University, Umeå 90187, Sweden.
| | - D Wang
- Biomat Lab, Department of Mechanical Engineering, National University of Singapore, 117576, Singapore; Department of Orthopedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, 119228, Singapore.
| | - L Wang
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China.
| | - X Guo
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China.
| | - M J Lammi
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Department of Integrative Medical Biology, Umeå University, Umeå 90187, Sweden.
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14
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Sulfated glycosaminoglycans: their distinct roles in stem cell biology. Glycoconj J 2016; 34:725-735. [DOI: 10.1007/s10719-016-9732-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/15/2016] [Accepted: 09/20/2016] [Indexed: 01/27/2023]
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15
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Brown DS, Eames BF. Emerging tools to study proteoglycan function during skeletal development. Methods Cell Biol 2016; 134:485-530. [PMID: 27312503 DOI: 10.1016/bs.mcb.2016.03.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In the past 20years, appreciation for the varied roles of proteoglycans (PGs), which are specific types of sugar-coated proteins, has increased dramatically. PGs in the extracellular matrix were long known to impart structural functions to many tissues, especially articular cartilage, which cushions bones and allows mobility at skeletal joints. Indeed, osteoarthritis is a debilitating disease associated with loss of PGs in articular cartilage. Today, however, PGs have a demonstrated role in cell biological processes, such as growth factor signalling, prompting new perspectives on the etiology of PG-associated diseases. Here, we review diseases associated with defects in PG synthesis and sulfation, also highlighting current understanding of the underlying genetics, biochemistry, and cell biology. Since most research has analyzed a class of PGs called heparan sulfate PGs, more attention is paid here to studies of chondroitin sulfate PGs (CSPGs), which are abundant in cartilage. Interestingly, CSPG synthesis is tightly linked to the cell biological processes of secretion and lysosomal degradation, suggesting that these systems may be linked genetically. Animal models of loss of CSPG function have revealed CSPGs to impact skeletal development. Specifically, our work from a mutagenesis screen in zebrafish led to the hypothesis that cartilage PGs normally delay the timing of endochondral ossification. Finally, we outline emerging approaches in zebrafish that may revolutionize the study of cartilage PG function, including transgenic methods and novel imaging techniques. Our recent work with X-ray fluorescent imaging, for example, enables direct correlation of PG function with PG-dependent biological processes.
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Affiliation(s)
- D S Brown
- University of Saskatchewan, Saskatoon, SK, Canada
| | - B F Eames
- University of Saskatchewan, Saskatoon, SK, Canada
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16
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Miyata S, Kitagawa H. Chondroitin 6-Sulfation Regulates Perineuronal Net Formation by Controlling the Stability of Aggrecan. Neural Plast 2016; 2016:1305801. [PMID: 27057358 PMCID: PMC4738747 DOI: 10.1155/2016/1305801] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 11/29/2015] [Indexed: 01/24/2023] Open
Abstract
Perineuronal nets (PNNs) are lattice-like extracellular matrix structures composed of chondroitin sulfate proteoglycans (CSPGs). The appearance of PNNs parallels the decline of neural plasticity, and disruption of PNNs reactivates neural plasticity in the adult brain. We previously reported that sulfation patterns of chondroitin sulfate (CS) chains on CSPGs influenced the formation of PNNs and neural plasticity. However, the mechanism of PNN formation regulated by CS sulfation remains unknown. Here we found that overexpression of chondroitin 6-sulfotransferase-1 (C6ST-1), which catalyzes 6-sulfation of CS chains, selectively decreased aggrecan, a major CSPG in PNNs, in the aged brain without affecting other PNN components. Both diffuse and PNN-associated aggrecans were reduced by overexpression of C6ST-1. C6ST-1 increased 6-sulfation in both the repeating disaccharide region and linkage region of CS chains. Overexpression of 6-sulfation primarily impaired accumulation of aggrecan in PNNs, whereas condensation of other PNN components was not affected. Finally, we found that increased 6-sulfation accelerated proteolysis of aggrecan by a disintegrin and metalloproteinase domain with thrombospondin motif (ADAMTS) protease. Taken together, our results indicate that sulfation patterns of CS chains on aggrecan influenced the stability of the CSPG, thereby regulating formation of PNNs and neural plasticity.
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Affiliation(s)
- Shinji Miyata
- Institute for Advanced Research, Nagoya University, Furo-cho, Nagoya 464-8601, Japan
- Bioscience and Biotechnology Center, Nagoya University, Furo-cho, Nagoya 464-8601, Japan
| | - Hiroshi Kitagawa
- Department of Biochemistry, Kobe Pharmaceutical University, 4-19-1 Motoyamakita-machi, Kobe 658-8558, Japan
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17
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Habicher J, Haitina T, Eriksson I, Holmborn K, Dierker T, Ahlberg PE, Ledin J. Chondroitin / dermatan sulfate modification enzymes in zebrafish development. PLoS One 2015; 10:e0121957. [PMID: 25793894 PMCID: PMC4368567 DOI: 10.1371/journal.pone.0121957] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 02/08/2015] [Indexed: 11/19/2022] Open
Abstract
Chondroitin/dermatan sulfate (CS/DS) proteoglycans consist of unbranched sulfated polysaccharide chains of repeating GalNAc-GlcA/IdoA disaccharide units, attached to serine residues on specific proteins. The CS/DS proteoglycans are abundant in the extracellular matrix where they have essential functions in tissue development and homeostasis. In this report a phylogenetic analysis of vertebrate genes coding for the enzymes that modify CS/DS is presented. We identify single orthologous genes in the zebrafish genome for the sulfotransferases chst7, chst11, chst13, chst14, chst15 and ust and the epimerase dse. In contrast, two copies were found for mammalian sulfotransferases CHST3 and CHST12 and the epimerase DSEL, named chst3a and chst3b, chst12a and chst12b, dsela and dselb, respectively. Expression of CS/DS modification enzymes is spatially and temporally regulated with a large variation between different genes. We found that CS/DS 4-O-sulfotransferases and 6-O-sulfotransferases as well as CS/DS epimerases show a strong and partly overlapping expression, whereas the expression is restricted for enzymes with ability to synthesize di-sulfated disaccharides. A structural analysis further showed that CS/DS sulfation increases during embryonic development mainly due to synthesis of 4-O-sulfated GalNAc while the proportion of 6-O-sulfated GalNAc increases in later developmental stages. Di-sulfated GalNAc synthesized by Chst15 and 2-O-sulfated GlcA/IdoA synthesized by Ust are rare, in accordance with the restricted expression of these enzymes. We also compared CS/DS composition with that of heparan sulfate (HS). Notably, CS/DS biosynthesis in early zebrafish development is more dynamic than HS biosynthesis. Furthermore, HS contains disaccharides with more than one sulfate group, which are virtually absent in CS/DS.
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Affiliation(s)
- Judith Habicher
- Department of Organismal Biology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Tatjana Haitina
- Department of Organismal Biology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Inger Eriksson
- Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Katarina Holmborn
- Department of Organismal Biology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Tabea Dierker
- Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Per E. Ahlberg
- Department of Organismal Biology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Johan Ledin
- Department of Organismal Biology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
- * E-mail:
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Chondroitin sulfate-E mediates estrogen-induced osteoanabolism. Sci Rep 2015; 5:8994. [PMID: 25759206 PMCID: PMC4355730 DOI: 10.1038/srep08994] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 02/13/2015] [Indexed: 12/13/2022] Open
Abstract
Osteoporosis is an age-related disorder of bone remodeling in which bone resorption outstrips bone matrix deposition. Although anticatabolic agents are frequently used as first-line therapies for osteoporosis, alternative anabolic strategies that can enhance anabolic, osteogenic potential are actively sought. Sex steroid hormones, particularly estrogens, are bidirectional regulators for bone homeostasis; therefore, estrogen-mediated events are important potential targets for such anabolic therapies. Here, we show that estrogen-induced, osteoanabolic effects were mediated via enhanced production of chondroitin sulfate-E (CS-E), which could act as an osteogenic stimulant in our cell-based system. Conversely, estrogen deficiency caused reduced expression of CS-E-synthesizing enzymes, including GalNAc4S-6ST, and led to decreased CS-E production in cultures of bone marrow cells derived from ovariectomized mice. Moreover, Galnac4s6st-deficient mice had abnormally low bone mass that resulted from impaired osteoblast differentiation. These results indicated that strategies aimed at boosting CS-E biosynthesis are promising alternative therapies for osteoporosis.
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Izumikawa T, Sato B, Mikami T, Tamura JI, Igarashi M, Kitagawa H. GlcUAβ1-3Galβ1-3Galβ1-4Xyl(2-O-phosphate) is the preferred substrate for chondroitin N-acetylgalactosaminyltransferase-1. J Biol Chem 2015; 290:5438-48. [PMID: 25568321 DOI: 10.1074/jbc.m114.603266] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A deficiency in chondroitin N-acetylgalactosaminyltransferase-1 (ChGn-1) was previously shown to reduce the number of chondroitin sulfate (CS) chains, leading to skeletal dysplasias in mice, suggesting that ChGn-1 regulates the number of CS chains for normal cartilage development. Recently, we demonstrated that 2-phosphoxylose phosphatase (XYLP) regulates the number of CS chains by dephosphorylating the Xyl residue in the glycosaminoglycan-protein linkage region of proteoglycans. However, the relationship between ChGn-1 and XYLP in controlling the number of CS chains is not clear. In this study, we for the first time detected a phosphorylated tetrasaccharide linkage structure, GlcUAβ1-3Galβ1-3Galβ1-4Xyl(2-O-phosphate), in ChGn-1(-/-) growth plate cartilage but not in ChGn-2(-/-) or wild-type growth plate cartilage. In contrast, the truncated linkage tetrasaccharide GlcUAβ1-3Galβ1-3Galβ1-4Xyl was detected in wild-type, ChGn-1(-/-), and ChGn-2(-/-) growth plate cartilage. Consistent with the findings, ChGn-1 preferentially transferred N-acetylgalactosamine to the phosphorylated tetrasaccharide linkage in vitro. Moreover, ChGn-1 and XYLP interacted with each other, and ChGn-1-mediated addition of N-acetylgalactosamine was accompanied by rapid XYLP-dependent dephosphorylation during formation of the CS linkage region. Taken together, we conclude that the phosphorylated tetrasaccharide linkage is the preferred substrate for ChGn-1 and that ChGn-1 and XYLP cooperatively regulate the number of CS chains in growth plate cartilage.
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Affiliation(s)
- Tomomi Izumikawa
- From the Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan
| | - Ban Sato
- From the Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan
| | - Tadahisa Mikami
- From the Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan
| | - Jun-ichi Tamura
- the Department of Regional Environment, Tottori University, Tottori 680-8551, Japan, and
| | - Michihiro Igarashi
- the Department of Neurochemistry and Molecular Cell Biology, Graduate School of Medical and Dental Sciences and Trans-disciplinary Program, Niigata University, 1-757 Asahi-machi, Chuo-ku, Niigata 951-8510, Japan
| | - Hiroshi Kitagawa
- From the Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan,
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Mizumoto S, Yamada S, Sugahara K. Human genetic disorders and knockout mice deficient in glycosaminoglycan. BIOMED RESEARCH INTERNATIONAL 2014; 2014:495764. [PMID: 25126564 PMCID: PMC4122003 DOI: 10.1155/2014/495764] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 06/08/2014] [Indexed: 12/20/2022]
Abstract
Glycosaminoglycans (GAGs) are constructed through the stepwise addition of respective monosaccharides by various glycosyltransferases and maturated by epimerases and sulfotransferases. The structural diversity of GAG polysaccharides, including their sulfation patterns and sequential arrangements, is essential for a wide range of biological activities such as cell signaling, cell proliferation, tissue morphogenesis, and interactions with various growth factors. Studies using knockout mice of enzymes responsible for the biosynthesis of the GAG side chains of proteoglycans have revealed their physiological functions. Furthermore, mutations in the human genes encoding glycosyltransferases, sulfotransferases, and related enzymes responsible for the biosynthesis of GAGs cause a number of genetic disorders including chondrodysplasia, spondyloepiphyseal dysplasia, and Ehlers-Danlos syndromes. This review focused on the increasing number of glycobiological studies on knockout mice and genetic diseases caused by disturbances in the biosynthetic enzymes for GAGs.
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Affiliation(s)
- Shuji Mizumoto
- Department of Pathobiochemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Shuhei Yamada
- Department of Pathobiochemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Kazuyuki Sugahara
- Laboratory of Proteoglycan Signaling and Therapeutics, Frontier Research Center for Post-Genomic Science and Technology, Graduate School of Life Science, Hokkaido University, West-11, North-21, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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21
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Prisco SZ, Prokop JW, Sarkis AB, Yeo NC, Hoffman MJ, Hansen CC, Jacob HJ, Flister MJ, Lazar J. Refined mapping of a hypertension susceptibility locus on rat chromosome 12. Hypertension 2014; 64:883-90. [PMID: 25001272 DOI: 10.1161/hypertensionaha.114.03550] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Previously, we found that transferring 6.1 Mb of salt-sensitive (SS) chromosome 12 (13.4-19.5 Mb) onto the consomic SS-12(BN) background significantly elevated mean arterial pressure in response to an 8% NaCl diet (178±7 versus 144±2 mm Hg; P<0.001). Using congenic mapping, we have now narrowed the blood pressure locus by 86% from a 6.1-Mb region containing 133 genes to an 830-kb region (chr12:14.36-15.19 Mb) with 14 genes. Compared with the SS-12(BN) consomic, the 830-kb blood pressure locus was associated with a ∆+15 mm Hg (P<0.01) increase in blood pressure, which coincided with elevated albuminuria (∆+32 mg/d; P<0.001), proteinuria (∆+48 mg/d; P<0.01), protein casting (∆+154%; P<0.05), and renal fibrosis (∆+79%; P<0.05). Of the 14 genes residing in the 830-kb locus, 8 were differentially expressed, and among these, Chst12 (carbohydrate chondroitin 4 sulfotransferase 12) was most consistently downregulated by 2.6- to 4.5-fold (P<0.05) in both the renal medulla and cortex under normotensive and hypertensive conditions. Moreover, whole genome sequence analysis of overlapping blood pressure loci revealed an ≈86-kb region (chr12:14 541 567-14 627 442 bp) containing single-nucleotide variants near Chst12 that are unique to the hypertensive SS strain when compared with the normotensive Brown Norway, Dahl salt-resistant, and Wistar-Kyoto strains. Finally, the 830-kb interval is syntenic to a region on human chromosome 7 that has been genetically linked to blood pressure, suggesting that insight gained from our SS-12(BN) congenic strain may be translated to a better understanding of human hypertension.
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Affiliation(s)
- Sasha Z Prisco
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Jeremy W Prokop
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Allison B Sarkis
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Nan Cher Yeo
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Matthew J Hoffman
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Colin C Hansen
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Howard J Jacob
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Michael J Flister
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee
| | - Jozef Lazar
- From the Human and Molecular Genetics Center (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., C.C.H., H.J.J., M.J.F., J.L.) and Departments of Physiology (S.Z.P., J.W.P., A.B.S., N.C.Y., M.J.H., H.J.J., M.J.F., J.L.), Pediatrics (H.J.J.), and Dermatology (J.L.), Medical College of Wisconsin, Milwaukee.
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Metabolism of cartilage proteoglycans in health and disease. BIOMED RESEARCH INTERNATIONAL 2014; 2014:452315. [PMID: 25105124 PMCID: PMC4106107 DOI: 10.1155/2014/452315] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 06/16/2014] [Indexed: 11/18/2022]
Abstract
Cartilage proteoglycans are extracellular macromolecules with complex structure, composed of a core protein onto which a variable number of glycosaminoglycan chains are attached. Their biosynthesis at the glycosaminoglycan level involves a great number of sugar transferases well-orchestrated in Golgi apparatus. Similarly, their degradation, either extracellular or intracellular in lysosomes, involves a large number of hydrolases. A deficiency or malfunction of any of the enzymes participating in cartilage proteoglycan metabolism may lead to severe disease state. This review summarizes the findings regarding this topic.
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Koike T, Izumikawa T, Sato B, Kitagawa H. Identification of phosphatase that dephosphorylates xylose in the glycosaminoglycan-protein linkage region of proteoglycans. J Biol Chem 2014; 289:6695-6708. [PMID: 24425863 DOI: 10.1074/jbc.m113.520536] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Recently, we demonstrated that FAM20B is a kinase that phosphorylates the xylose (Xyl) residue in the glycosaminoglycan-protein linkage region of proteoglycans. The phosphorylation of Xyl residues by FAM20B enhances the formation of the linkage region. Rapid dephosphorylation is probably induced just after synthesis of the linker and just before polymerization initiates. Indeed, in vitro chondroitin or heparan sulfate polymerization does not occur when the Xyl residue of the tetrasaccharide linkage region is phosphorylated. However, the enzyme responsible for the dephosphorylation of Xyl remains unknown. Here, we identified a novel protein that dephosphorylates the Xyl residue and designated it 2-phosphoxylose phosphatase. The phosphatase efficiently removed the phosphate from the phosphorylated trisaccharide, Galβ1-3Galβ1-4Xyl(2-O-phosphate), but not from phosphorylated tetrasaccharide, GlcUAβ1-3Galβ1-3Galβ1-4Xyl(2-O-phosphate). Additionally, RNA interference-mediated inhibition of 2-phosphoxylose phosphatase resulted in increased amounts of GlcNAcα1-4GlcUAβ1-3Galβ1-3Galβ1-4Xyl(2-O-phosphate), Galβ1-3Galβ1-4Xyl(2-O-phosphate), and Galβ1-4Xyl(2-O-phosphate) in the cells. Gel filtration analysis of the glycosaminoglycan chains synthesized in the knockdown cells revealed that these cells produced decreased amounts of glycosaminoglycan chains and that the chains had similar lengths to those in the mock-transfected cells. Transcripts encoding this phosphatase were ubiquitously, but differentially, expressed in human tissues. Moreover, the phosphatase localized to the Golgi and interacted with the glucuronyltransferase-I involved in the completion of the glycosaminoglycan-protein linkage region. Based on these findings, we conclude that transient phosphorylation of the Xyl residue in the glycosaminoglycan-protein linkage region controls the formation of glycosaminoglycan chains of proteoglycans.
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Affiliation(s)
- Toshiyasu Koike
- Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan
| | - Tomomi Izumikawa
- Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan
| | - Ban Sato
- Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan
| | - Hiroshi Kitagawa
- Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan.
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Mikami T, Kitagawa H. Biosynthesis and function of chondroitin sulfate. Biochim Biophys Acta Gen Subj 2013; 1830:4719-33. [DOI: 10.1016/j.bbagen.2013.06.006] [Citation(s) in RCA: 234] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 06/03/2013] [Accepted: 06/06/2013] [Indexed: 10/26/2022]
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Izumikawa T, Saigoh K, Shimizu J, Tsuji S, Kusunoki S, Kitagawa H. A chondroitin synthase-1 (ChSy-1) missense mutation in a patient with neuropathy impairs the elongation of chondroitin sulfate chains initiated by chondroitin N-acetylgalactosaminyltransferase-1. Biochim Biophys Acta Gen Subj 2013; 1830:4806-12. [PMID: 23811343 DOI: 10.1016/j.bbagen.2013.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 05/29/2013] [Accepted: 06/17/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND Previously, we identified two missense mutations in the chondroitin N-acetylgalactosaminyltransferase-1 gene in patients with neuropathy. These mutations are associated with a profound decrease in chondroitin N-acetylgalactosaminyltransferase-1 enzyme activity. Here, we describe a patient with neuropathy who is heterozygous for a chondroitin synthase-1 mutation. Chondroitin synthase-1 has two glycosyltransferase activities: it acts as a GlcUA and a GalNAc transferase and is responsible for adding repeated disaccharide units to growing chondroitin sulfate chains. METHODS Recombinant wild-type chondroitin synthase-1 enzyme and the F362S mutant were expressed. These enzymes and cells expressing them were then characterized. RESULTS The mutant chondroitin synthase-1 protein retained approximately 50% of each glycosyltransferase activity relative to the wild-type chondroitin synthase-1 protein. Furthermore, unlike chondroitin polymerase comprised of wild-type chondroitin synthase-1 protein, the non-reducing terminal 4-O-sulfation of GalNAc residues synthesized by chondroitin N-acetylgalactosaminyltransferase-1 did not facilitate the elongation of chondroitin sulfate chains when chondroitin polymerase that consists of the mutant chondroitin synthase-1 protein was used as the enzyme source. CONCLUSIONS The chondroitin synthase-1 F362S mutation in a patient with neuropathy resulted in a decrease in chondroitin polymerization activity and the mutant protein was defective in regulating the number of chondroitin sulfate chains via chondroitin N-acetylgalactosaminyltransferase-1. Thus, the progression of peripheral neuropathies may result from defects in these regulatory systems. GENERAL SIGNIFICANCE The elongation of chondroitin sulfate chains may be tightly regulated by the cooperative expression of chondroitin synthase-1 and chondroitin N-acetylgalactosaminyltransferase-1 in peripheral neurons and peripheral neuropathies may result from synthesis of abnormally truncated chondroitin sulfate chains.
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Affiliation(s)
- Tomomi Izumikawa
- Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe, Japan
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Koike T, Izumikawa T, Tamura JI, Kitagawa H. Chondroitin sulfate-E fine-tunes osteoblast differentiation via ERK1/2, Smad3 and Smad1/5/8 signaling by binding to N-cadherin and cadherin-11. Biochem Biophys Res Commun 2012; 420:523-9. [PMID: 22440395 DOI: 10.1016/j.bbrc.2012.03.024] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Accepted: 03/07/2012] [Indexed: 11/15/2022]
Abstract
Bone formation in the vertebrate skeleton occurs via the processes of endochondral and membranous ossification. Bone matrices contain chondroitin sulfate (CS) chains that regulate endochondral ossification. However, the function of CS in membranous ossification is unclear. Here, using preosteoblastic MC3T3-E1 cells we demonstrate that chondroitin sulfate-E (CS-E) promotes osteoblast differentiation by binding to both N-cadherin and cadherin-11. Differentiated MC3T3-E1 cells exhibited an increase in the total amount of CS and of E-disaccharide units of CS over time. In addition, CS-E polysaccharide, but not CS-A polysaccharide, bound to N-cadherin and cadherin-11 and enhanced osteoblast differentiation. In contrast, osteoblast differentiation was inhibited in chondroitinase ABC-digested MC3T3-E1 cells. Notably, CS-E polysaccharide and hexasaccharide activated intracellular signaling during osteoblast differentiation in non-contacting MC3T3-E1 cells, decreased ERK1/2 phosphorylation, and activated Smad3 and Smad1/5/8; these reactions were blocked by neutralizing antibodies against N-cadherin or cadherin-11, even though cell-cell adhesion is reported to be required for initiation of MC3T3-E1 cell differentiation. Furthermore, CS-E-unit overexpression in MC3T3-E1 cells increased adhesion of the cells to N-cadherin and cadherin-11, and promoted osteoblast differentiation. Collectively, these results suggest that CS-E is a selective ligand for the potential CS receptors, N-cadherin and cadherin-11, leading to osteoblast differentiation of MC3T3-E1 cells.
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Affiliation(s)
- Toshiyasu Koike
- Department of Biochemistry, Kobe Pharmaceutical University, Higashinada-ku, Kobe 658-8558, Japan
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Muthana SM, Campbell CT, Gildersleeve JC. Modifications of glycans: biological significance and therapeutic opportunities. ACS Chem Biol 2012; 7:31-43. [PMID: 22195988 DOI: 10.1021/cb2004466] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carbohydrates play a central role in a wide range of biological processes. As with nucleic acids and proteins, modifications of specific sites within the glycan chain can modulate a carbohydrate's overall biological function. For example, acylation, methylation, sulfation, epimerization, and phosphorylation can occur at various positions within a carbohydrate to modulate bioactivity. Therefore, there is significant interest in identifying discrete carbohydrate modifications and understanding their biological effects. Additionally, enzymes that catalyze those modifications and proteins that bind modified glycans provide numerous targets for therapeutic intervention. This review will focus on modifications of glycans that occur after the oligomer/polymer has been assembled, generally referred to as post-glycosylational modifications.
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Affiliation(s)
- Saddam M. Muthana
- Chemical Biology Laboratory, National Cancer Institute, NCI-Frederick, Frederick, Maryland 21702, United States
| | - Christopher T. Campbell
- Chemical Biology Laboratory, National Cancer Institute, NCI-Frederick, Frederick, Maryland 21702, United States
| | - Jeffrey C. Gildersleeve
- Chemical Biology Laboratory, National Cancer Institute, NCI-Frederick, Frederick, Maryland 21702, United States
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