Proteoglycans & Glycosaminoglycans
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Mechanistic Target of Rapamycin Regulates the Oligodendrocyte Cytoskeleton During Myelination
Research ReportDevelopment/Plasticity/Repair Mechanistic Target of Rapamycin Regulates the Oligodendrocyte Cytoskeleton during Myelination https://doi.org/10.1523/JNEUROSCI.1434-18.2020 Cite as: J. Neurosci 2020; 10.1523/JNEUROSCI.1434-18.2020 Received: 31 May 2018 Revised: 23 February 2020 Accepted: 26 February 2020 This Early Release article has been peer-reviewed and accepted, but has not been through the composition and copyediting processes. The final version may differ slightly in style or formatting and will contain links to any extended data. Alerts: Sign up at www.jneurosci.org/alerts to receive customized email alerts when the fully formatted version of this article is published. Copyright © 2020 Musah et al. 1 Mechanistic Target of Rapamycin Regulates the Oligodendrocyte Cytoskeleton during 2 Myelination 3 1Aminat S. Musah, 2Tanya L. Brown, 1Marisa A. Jeffries, 1Quan Shang, 2Hirokazu Hashimoto, 4 1Angelina V. Evangelou, 3Alison Kowalski, 3Mona Batish, 2Wendy B. Macklin and 1Teresa L. 5 Wood 6 1Department of Pharmacology, Physiology & Neuroscience, New Jersey Medical School, 7 Rutgers University, Newark, NJ U.S.A. 07101, 2Department of Cell and Developmental Biology, 8 University of Colorado School of Medicine, Aurora, CO, U.S.A. 80045, 3Department of Medical 9 and Molecular Sciences, University of Delaware, Newark, DE 19716 10 11 Abbreviated Title: mTOR Regulates the Oligodendrocyte Cytoskeleton 12 Corresponding Author: Teresa L. Wood, PhD, Department Pharmacology, Physiology & 13 Neuroscience, New Jersey Medical School Cancer Center H1200, Rutgers University, 205 S. 14 Orange Ave, Newark, NJ 07101-1709 15 [email protected] 16 Number of pages: 39 17 Number of Figures: 10 18 Number of Tables: 0 19 Number of Words: 20 Abstract: 242 21 Introduction: 687 22 Discussion: 1075 23 Conflict of Interest: The authors declare no competing financial interests. -
Distribution and Clinical Significance of Heparan Sulfate Proteoglycans in Ovarian Cancer
5178 Vol. 10, 5178–5186, August 1, 2004 Clinical Cancer Research Distribution and Clinical Significance of Heparan Sulfate Proteoglycans in Ovarian Cancer E. June Davies,1 Fiona H. Blackhall,1 decan-1 and glypican-1 were poor prognostic factors for Jonathan H. Shanks,2 Guido David,3 survival in univariate analysis. Alan T. McGown,4 Ric Swindell,5 Conclusion: We report for the first time distinct pat- 6 7 terns of expression of cell surface and extracellular matrix Richard J. Slade, Pierre Martin-Hirsch, heparan sulfate proteoglycans in normal ovary compared 1 1 John T. Gallagher, and Gordon C. Jayson with ovarian tumors. These data reinforce the role of the 1Cancer Research UK and University of Manchester Department of tumor stroma in ovarian adenocarcinoma and suggest that Medical Oncology, Paterson Institute for Cancer Research, stromal induction of syndecan-1 contributes to the patho- Manchester, England; 2Department of Histopathology, Christie Hospital NHS Trust, Manchester, England; 3Department of Medicine, genesis of this malignancy. University of Leuven, Leuven, Belgium.; 4Cancer Research UK Department of Experimental Pharmacology, Paterson Institute for Cancer Research, Manchester, England; 5Department of Medical INTRODUCTION Statistics, Christie Hospital NHS Trust, Manchester, England; The heparan sulfate proteoglycans (HSPGs) play diverse 6Department of Obstetrics and Gynaecology, Hope Hospital, Salford, Manchester, England; 7Department of Gynaecological Oncology, St. roles in tumor biology by mediating adhesion and migration -
Healon®) on a Nonregeneroting (Feline) Corneal Endothelium
Effect of 1 % Sodium Hyoluronote (Healon®) on a Nonregeneroting (Feline) Corneal Endothelium Charles F. Bahn,* Robert Grosserode,f^: David C. Musch,f Joseph Feder,f§ Roger F. Meyer, f Donald K. MacCallum.f John H. Lillie,f and Norman M. Rich* A series of experiments were performed to investigate the effect of 1% sodium hyaluronate (Healon®) on the nonregenerating corneal endothelium of the cat. Aqueous humor replacement with 1% sodium hyaluronate resulted in mild, transient elevations of intraocular pressure compared to eyes that were injected with balanced salt solution. Sodium hyaluronate 1% protected the feline endothelium against cell loss incurred by contact with hyaluronate-coated intraocular lenses compared to endothelial contact with lenses that were not coated with sodium hyaluronate. The use of intraoperative 1% sodium hyal- uronate, however, did not protect against endothelial cell loss incurred by penetrating keratoplasty or prevent subsequent skin graft-induced corneal homograft rejections. Homograft rejections were milder, however, in some eyes that received grafts coated with 1% sodium hyaluronate. Image analysis of pho- tographs of trypan blue- and alizarin red-stained corneal buttons after trephining, stretching of Descemet's membrane, rubbing against iris-lens preparations, or immediately after penetrating keratoplasty dem- onstrated that the stretching of the posterior cornea is an important cause of endothelial damage that would not be protected against by a viscoelastic coating. Invest Ophthalmol Vis Sci 27:1485-1494,1986 -
VISCO-3 (Sodium Hyaluronate)
Patient Information VISCO-3TM (Sodium Hyaluronate) Federal law restricts this device to sale by or on the order of a physician. Please make sure to read the following important information carefully. This information does not take the place of your doctor’s advice. If you do not understand this information or want to know more, ask your doctor. Your doctor has determined that the knee pain you are experiencing is caused by osteoarthritis and that you are a candidate for a non-surgical, non-pharmacological, pain-relieving therapy called VISCO-3TM. VISCO-3TM is used for the treatment of pain in osteoarthritis of the knee in patients who have failed to get adequate relief from simple painkillers or from exercise and physical therapy. Contents What is VISCO-3TM? 2 What are the benefits of VISCO-3TM? 2 How is VISCO-3TM given? 2 What should you expect following your series of injections? 2 What other treatments are available for osteoarthritis? 3 Are there any reasons why you should not use VISCO-3TM? 3 Possible complications: 3 Other things you should know about VISCO-3 TM: 4 Summary of Clinical Study: 4 How can you get more information about VISCO-3TM? 5 Page 1 of 5 What is VISCO-3TM? VISCO-3TM is a solution made of highly purified, sodium hyaluronate (hyaluronan). Hyaluronan is a natural chemical found in the body and is found in particularly high amounts in joint tissues and in the fluid (synovial fluid) that fills the joints. The body’s own hyaluronan acts like a lubricant and shock absorber in synovial fluid of a healthy joint. -
Glycosaminoglycan Therapy for Long-Term Diabetic Complications?
Diabetologia (1998) 41: 975±979 Ó Springer-Verlag 1998 For debate Glycosaminoglycan therapy for long-term diabetic complications? G.Gambaro1, J.Skrha2, A. Ceriello3 1 Institute of Internal Medicine, Division of Nephrology, University of Padua, Italy 2 3rd Department of Internal Medicine, Charles University, Prague, Czech Republic 3 Department of Internal Medicine, University of Udine, Italy Long-term complications are the most important and an aminosugar (glucosamine or galattosamine) cause of mortality of diabetic patiens in western [5]. These molecules are widely distributed in the countries and diabetic nephropathy has emerged as body and prominent in extracellular matrices [5]. a major determinant of end-stage renal failure [1]. Three major classes of GAGs have been de- Moreover, patients with diabetes mellitus have a scribed: a predominant large chondroitin sulphate, a high probability of developing acute cardiovascular small dermatan sulphate and a polydisperse heparan disease, in particular myocardial infarction and cere- sulphate (HS) [5]. GAGs are vital in maintaining the brovascular stroke which are the cause of death in structural integrity of the tissue and studies have nearly 80% of this population [2]. Although data shown that basement membranes contain HS in the from the Diabetes Control and Complications Trial form of a proteoglycan unique to that tissue [5]. HS establish that hyperglycaemia has a central role in di- forms anionic sites in this matrix and are thought to abetic complications, strict metabolic control can be restrict the passage of proteins through the basement difficult to achieve. The search for new and ancillary membrane [5]. approaches to diabetic complications is therefore warranted and understanding the distal pathway of glucose toxicity assumes clinical and therapeutical GAG metabolism and diabetes mellitus significance. -
Sialylated Keratan Sulfate Chains Are Ligands for Siglec-8 in Human Airways
Sialylated Keratan Sulfate Chains are Ligands for Siglec-8 in Human Airways by Ryan Porell A dissertation submitted to Johns Hopkins University in conformity with the requirements for the degree of Doctor of Philosophy Baltimore, Maryland September 2018 © 2018 Ryan Porell All Rights Reserved ABSTRACT Airway inflammatory diseases are characterized by infiltration of immune cells, which are tightly regulated to limit inflammatory damage. Most members of the Siglec family of sialoglycan binding proteins are expressed on the surfaces of immune cells and are immune inhibitory when they bind their sialoglycan ligands. When Siglec-8 on activated eosinophils and mast cells binds to its sialoglycan ligands, apoptosis or inhibition of mediator release is induced. We identified human airway Siglec-8 ligands as sialylated and 6’-sulfated keratan sulfate (KS) chains carried on large proteoglycans. Siglec-8- binding proteoglycans from human airways increase eosinophil apoptosis in vitro. Given the structural complexity of intact proteoglycans, target KS chains were isolated from airway tissue and lavage. Biological samples were extensively proteolyzed, the remaining sulfated glycan chains captured and resolved by anion exchange chromatography, methanol-precipitated then chondroitin and heparan sulfates enzymatically hydrolyzed. The resulting preparation consisted of KS chains attached to a single amino acid or a short peptide. Purified KS chains were hydrolyzed with either hydrochloric acid or trifluoroacetic acid to release acidic and neutral sugars, respectively, followed by DIONEX carbohydrate analysis. To isolate Siglec-8-binding KS chains, purified KS chains from biological samples were biotinylated at the amino acid, resolved by affinity and/or size- exclusion chromatography, the resulting fractions immobilized on streptavidin microwell plates, and probed for binding of Siglec-8-Fc. -
Three Is a Crowd
TREPAR 1600 No. of Pages 12 Review Three Rosetting[403_TD$IF] in Plasmodium falciparum Xue Yan Yam,1,3 Makhtar Niang,2,3 Kripa Gopal Madnani,1,3 and Peter R. Preiser1,* The intracellular malaria parasites extensively modify host erythrocytes to allow Trends nutrient uptake, ensure homeostasis, and evade the host’s immune response. Rosetting, the binding of uninfected To achieve this, the parasite exports several proteins to the erythrocyte surface. RBCs to a parasite-infected RBC In Plasmodium falciparum, the parasite responsible for the most severe form of (iRBC), has been directly linked to human malaria, three major variant surface antigen families – PfEMP1, STE- the severity of clinical disease. VOR, and RIFIN – have been implicated in contributing to immune evasion, Three parasite protein families, parasite sequestration, and parasite-mediated rosetting of uninfected eryth- PfEMP1, STEVOR, and RIFIN, mediate rosetting in Plasmodium falciparum. rocytes. Sequestration and rosetting have been linked to parasite-mediated pathology, making the variant surface antigens of P. falciparum major virulence Sequential timing of surface expres- factors. Here we review our current understanding of rosetting mechanism, sion of PfEMP1, RIFIN, and STEVOR fi on iRBC suggests that the parasite has recent ndings of STEVOR, RIFIN-mediated rosetting, and their implication on developed three different rosette for- the severity and pathology of the disease. mation mechanisms, implicating a cri- tical function for parasite survival. Plasmodium Variant Surface Antigens of Parasites: A Role in Rosetting PfEMP1 mediates rosetting through Plasmodium parasites have a complex life cycle involving a mosquito vector and a mammalian CR1, heparan sulfate, and blood group host. -
Matrix Protection Therapy in Diabetic Foot Ulcers: Pilot Study of CACIPLIQ20®
Review INES SLIM (MD)1, HOUDA TAJOURI (MD)1, DENIS BARRITAULT (PHD)2,3, MAHA KACEM NJAH (MD)1, KOUSSAY ACH (MD)1, MOLKA CHADLI CHAIEB MD1, LARBI CHAIEB (MD)1 1. Endocrinology and Diabetology Department, Farhat Hached University Hospital, Ibn Jazzar Street, 4000, Sousse, Tunisia. 2. OTR3, 4 Rue Française, 75001 Paris, France. 3. Laboratoire CRRET , CNRS UMR 7149 Sciences Faculty, Paris Est Créteil University, 94000 Créteil, France. Matrix Protection Therapy in Diabetic Foot Ulcers: Pilot Study of CACIPLIQ20® Abstract We evaluated whether matrix protection therapy by CACIPLIQ20® promotes healing of chronic lower extremity wounds in diabetic patients. Ten diabetic patients with non-infected chronic skin wounds and with no evidence of healing were inclu- ded. CACIPLIQ20® was applied topically twice a week for 5 minutes for up to 10 weeks. Wound surface area was measured at baseline then weekly during treatment. Wound closure, defined as complete reepithelialization, was the primary end- point. Mean wound surface area decreased by 25% within the first week (p=0.021 vs. baseline) and by 47% after 4 weeks (p=0.001 vs. baseline). After 10 weeks, the wound was closed in 6 of the 10 patients and decreased over 80% in the other patients. Subsequently, the none healed patients returned to standard care. Six months later, complete wound healing was noted in one additional patient and no further change in the remaining 3 patients. Two patients were again treated with CACI- PLIQ20® for one month: one healed, the other improved again by 50%. Nine months later, closed ulcers did not re-open. -
Aggrecan (A1960)
Aggrecan from bovine articular cartilage Catalog Number A1960 Storage Temperature –20 °C Product Description References Aggrecan is the major structural proteoglycan found in 1. Hardingham, T.E., and Muir, H., Biochim. Biophys. the extracellular matrix of cartilage. It has a molecular Acta, 279, 401-405 (1972). mass >2,500 kDa. The core protein (210–250 kDa) has 2. Hedlund, H., et al., Association of the aggrecan 100–150 glycosaminoglycan (GAG) chains attached to keratan sulfate-rich region with collagen in bovine it. The majority of the GAG chains are chondroitin/ articular cartilage. J. Biol. Chem., 274, 5777-5781 dermatan sulfate with the remainder being keratan (1999). sulfate. This structural molecule produces a rigid, 3. Cao, L., and Yang, B.B., Chondrocyte apoptosis reversibly deformable gel that resists compression. It induced by aggrecan G1 domain as a result of combines with hyaluronic acid to form very large decreased cell adhesion. Exp. Cell Res., 246, 527- macromolecular complexes. Addition of small amounts 537 (1999). (0.1–2% w/w) of hyaluronic acid to a solution of 4. Bolton, M.C., et al., Age-related changes in the aggrecan (2 mg/ml) results in the formation of a synthesis of link protein and aggrecan in human complex with an increased hydrodynamic volume and articular cartilage: implications for aggregate in a significant increase (30–40%) in the relative stability. Biochem. J., 337, 77-82 (1999). viscosity of the solution. 5. Arner, E.C., et al., Generation and Characterization of Aggrecanase. A soluble, cartilage-derived Aggrecan is a critical component for cartilage structure aggrecan-degrading activity. -
Constructing 3-Dimensional Atomic-Resolution Models of Nonsulfated Glycosaminoglycans with Arbitrary Lengths Using Conformations from Molecular Dynamics
International Journal of Molecular Sciences Article Constructing 3-Dimensional Atomic-Resolution Models of Nonsulfated Glycosaminoglycans with Arbitrary Lengths Using Conformations from Molecular Dynamics Elizabeth K. Whitmore 1,2 , Devon Martin 1,2 and Olgun Guvench 1,2,* 1 Department of Pharmaceutical Sciences and Administration, University of New England School of Pharmacy, 716 Stevens Avenue, Portland, ME 04103, USA; [email protected] (E.K.W.); [email protected] (D.M.) 2 Graduate School of Biomedical Science and Engineering, University of Maine, 5775 Stodder Hall, Orono, ME 04469, USA * Correspondence: [email protected]; Tel.: +1-207-221-4171 Received: 10 September 2020; Accepted: 15 October 2020; Published: 18 October 2020 Abstract: Glycosaminoglycans (GAGs) are the linear carbohydrate components of proteoglycans (PGs) and are key mediators in the bioactivity of PGs in animal tissue. GAGs are heterogeneous, conformationally complex, and polydisperse, containing up to 200 monosaccharide units. These complexities make studying GAG conformation a challenge for existing experimental and computational methods. We previously described an algorithm we developed that applies conformational parameters (i.e., all bond lengths, bond angles, and dihedral angles) from molecular dynamics (MD) simulations of nonsulfated chondroitin GAG 20-mers to construct 3-D atomic-resolution models of nonsulfated chondroitin GAGs of arbitrary length. In the current study, we applied our algorithm to other GAGs, including hyaluronan and nonsulfated forms of -
Glycosaminoglycans As Active Signaling Components of the Extracellular Matrix
1 Chapter 1 Glycosaminoglycans as Active Signaling Components of the Extracellular Matrix Portions of this chapter are published as: Griffin ME, Hsieh-Wilson LC. “Glycan engineering for cell and developmental biology.” Cell Chem. Biol. 2016, 23: 108-121. doi: 10.1016/j.chembiol.2015. 12.007. Review article. 2 1.1 Glycosaminoglycan Structures and Biosynthesis Carbohydrates are generally thought of as a fuel source for life. However, these molecules also function in many other roles necessary for survival including development, angiogenesis, and neuronal growth.1-5 In particular, carbohydrates at the cell surface can strongly regulate signal transduction and cellular activity. This feat is achieved in large part through their structural diversity, which allows them to selectively bind to a variety of different proteins and in turn modulate their functions. Unsurprisingly, the dysregulation of cell-surface carbohydrate production and presentation can contribute to a variety of diseases including inflammation and cancer progression.6, 7 Therefore, discovering relationships between the chemical structures of carbohydrates, the proteins to which they bind, and the resulting biological functions is critical both for the basic understanding of many physiological processes and for the prevention and treatment of various pathologies. Cell-surface carbohydrates exist in a variety of forms and are classified based on their overall size, membrane anchor, monosaccharide composition, glycosidic connections, and further modifications of the monosaccharide -
Mucins: the Old, the New and the Promising Factors in Hepatobiliary Carcinogenesis
International Journal of Molecular Sciences Review Mucins: the Old, the New and the Promising Factors in Hepatobiliary Carcinogenesis Aldona Kasprzak 1,* and Agnieszka Adamek 2 1 Department of Histology and Embryology, Poznan University of Medical Sciences, Swiecicki Street 6, 60-781 Pozna´n,Poland 2 Department of Infectious Diseases, Hepatology and Acquired Immunodeficiencies, University of Medical Sciences, Szwajcarska Street 3, 61-285 Pozna´n,Poland; [email protected] * Correspondence: [email protected]; Tel.: +48-61-8546441; Fax: +48-61-8546440 Received: 25 February 2019; Accepted: 10 March 2019; Published: 14 March 2019 Abstract: Mucins are large O-glycoproteins with high carbohydrate content and marked diversity in both the apoprotein and the oligosaccharide moieties. All three mucin types, trans-membrane (e.g., MUC1, MUC4, MUC16), secreted (gel-forming) (e.g., MUC2, MUC5AC, MUC6) and soluble (non-gel-forming) (e.g., MUC7, MUC8, MUC9, MUC20), are critical in maintaining cellular functions, particularly those of epithelial surfaces. Their aberrant expression and/or altered subcellular localization is a factor of tumour growth and apoptosis induced by oxidative stress and several anti-cancer agents. Abnormal expression of mucins was observed in human carcinomas that arise in various gastrointestinal organs. It was widely believed that hepatocellular carcinoma (HCC) does not produce mucins, whereas cholangiocarcinoma (CC) or combined HCC-CC may produce these glycoproteins. However, a growing number of reports shows that mucins can be produced by HCC cells that do not exhibit or are yet to undergo, morphological differentiation to biliary phenotypes. Evaluation of mucin expression levels in precursors and early lesions of CC, as well as other types of primary liver cancer (PLC), conducted in in vitro and in vivo models, allowed to discover the mechanisms of their action, as well as their participation in the most important signalling pathways of liver cystogenesis and carcinogenesis.