1
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Zhou W, Wang N, Dong S, Huan Z, Sui L, Ge X. PRG4 mitigates hemorrhagic shock-induced cardiac injury by inhibiting mitochondrial dysregulation, oxidative stress and NLRP3-mediated pyroptosis. Int Immunopharmacol 2024; 137:112507. [PMID: 38897120 DOI: 10.1016/j.intimp.2024.112507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 06/10/2024] [Accepted: 06/14/2024] [Indexed: 06/21/2024]
Abstract
Hemorrhagic shock (HS) is one of the main causes of morbidity and death in patients with trauma or major surgery. Cardiac dysfunction is a well-known complication of HS. PRG4, also known as lubricin, is a mucin-like glycoprotein that plays anti-inflammatory and anti-apoptotic roles in a variety of diseases. In this study, we aimed to explore the cardioprotective efficacy of PRG4 in HS-induced cardiac injury. Employing the HS model and RNA-seq, we found that PRG4 was increased in the myocardial tissue of rats after HS. In vivo studies suggested that HS led to abnormal hemodynamic parameters and increased cTnI levels, and PRG4 overexpression effectively reversed these changes. PRG4 also suppressed HS-induced mitochondrial disorders, as reflected by increased mitochondrial membrane potential (MMP), ATP and mitochondria cytochrome c, COXIV and TOM20, as well as decreased BNIP3L and cytoplasmic cytochrome c. Furthermore, HS led to enhanced oxidative stress, as evidenced by upregulated ROS and MDA contents, and downregulated SOD and CAT activities, and these alterations were negated by PRG4 overexpression. Notably, PRG4 repressed the NLRP3-mediated pyroptosis pathway, as illustrated by decreased NLRP3 levels, caspase-1 activity and GSDMD-NT levels. In summary, these observations indicate that PRG4 overexpression protects against HS-induced cardiac dysfunction by inhibiting mitochondrial dysregulation, oxidative stress and NLRP3-mediated pyroptosis.
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Affiliation(s)
- Wuming Zhou
- Department of Critical Care Medicine, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214000, People's Republic of China
| | - Nan Wang
- Department of Critical Care Medicine, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214000, People's Republic of China
| | - Sheng Dong
- Department of Emergency, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214000, People's Republic of China
| | - Zhirong Huan
- Department of Critical Care Medicine, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214000, People's Republic of China
| | - Lijun Sui
- Department of Cardiology, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214000, People's Republic of China.
| | - Xin Ge
- Department of Critical Care Medicine, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214000, People's Republic of China; Department of Emergency, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214000, People's Republic of China; Orthopedic Institution of Wuxi City, Wuxi, Jiangsu 214000, People's Republic of China.
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2
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Ghelich P, Samandari M, Hassani Najafabadi A, Tanguay A, Quint J, Menon N, Ghanbariamin D, Saeedinejad F, Alipanah F, Chidambaram R, Krawetz R, Nuutila K, Toro S, Barnum L, Jay GD, Schmidt TA, Tamayol A. Dissolvable Immunomodulatory Microneedles for Treatment of Skin Wounds. Adv Healthc Mater 2024; 13:e2302836. [PMID: 38299437 DOI: 10.1002/adhm.202302836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/21/2023] [Indexed: 02/02/2024]
Abstract
Sustained inflammation can halt or delay wound healing, and macrophages play a central role in wound healing. Inflammatory macrophages are responsible for the removal of pathogens, debris, and neutrophils, while anti-inflammatory macrophages stimulate various regenerative processes. Recombinant human Proteoglycan 4 (rhPRG4) is shown to modulate macrophage polarization and to prevent fibrosis and scarring in ear wound healing. Here, dissolvable microneedle arrays (MNAs) carrying rhPRG4 are engineered for the treatment of skin wounds. The in vitro experiments suggest that rhPRG4 modulates the inflammatory function of bone marrow-derived macrophages. Degradable and detachable microneedles are developed from gelatin methacryloyl (GelMA) attach to a dissolvable gelatin backing. The developed MNAs are able to deliver a high dose of rhPRG4 through the dissolution of the gelatin backing post-injury, while the GelMA microneedles sustain rhPRG4 bioavailability over the course of treatment. In vivo results in a murine model of full-thickness wounds with impaired healing confirm a decrease in inflammatory biomarkers such as TNF-α and IL-6, and an increase in angiogenesis and collagen deposition. Collectively, these results demonstrate rhPRG4-incorporating MNA is a promising platform in skin wound healing applications.
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Affiliation(s)
- Pejman Ghelich
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Mohamadmahdi Samandari
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Alireza Hassani Najafabadi
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Adam Tanguay
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Jacob Quint
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Nikhil Menon
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Delaram Ghanbariamin
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Farnoosh Saeedinejad
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Fatemeh Alipanah
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Ramaswamy Chidambaram
- Center for Comparative Medicine, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Roman Krawetz
- McCaig Institute for Bone & Joint Health, University of Calgary, Calgary, AB, T2N 4Z6, Canada
- Department of Surgery, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Kristo Nuutila
- US Army Institute of Surgical Research, Fort Sam Houston, Texas, 78234, USA
| | - Steven Toro
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Lindsay Barnum
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Gregory D Jay
- Emergency Medicine, Brown University, Providence, RI, 02908, USA
| | - Tannin A Schmidt
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Ali Tamayol
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, 06030, USA
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3
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Tanguay AP, Menon NG, Boudreau MH, Jastrzebski S, Woods PS, Doyle EA, Edwards WB, Jay GD, Deymier AC, Lorenzo J, Lee SK, Schmidt TA. PRG4 deficiency in mice alters skeletal structure, mechanics, and calvarial osteoclastogenesis, and rhPRG4 inhibits in vitro osteoclastogenesis. J Orthop Res 2024; 42:1231-1243. [PMID: 38111181 DOI: 10.1002/jor.25772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 11/14/2023] [Accepted: 12/12/2023] [Indexed: 12/20/2023]
Abstract
Osteoporosis is a chronic disease characterized by reduced bone mass and increased fracture risk, estimated to affect over 10 million people in the United States alone. Drugs used to treat bone loss often come with significant limitations and/or long-term safety concerns. Proteoglycan-4 (PRG4, also known as lubricin) is a mucin-like glycoprotein best known for its boundary lubricating function of articular cartilage. In more recent years, it has been shown that PRG4 has anti-inflammatory properties, contributes to the maintenance of subchondral bone integrity, and patients with PRG4 mutations are osteopenic. However, it remains unknown how PRG4 impacts mechanical and material properties of bone. Therefore, our objective was to perform a phenotyping study of bone in a Prg4 gene trap (GT) mouse (PRG4 deficient). We found that femurs of Prg4 GT mice have altered mechanical, structural, and material properties relative to wildtype littermates. Additionally, Prg4 GT mice have a greater number of calvarial osteoclasts than wildtype mice, but do not have a notable inflammatory serum profile. Finally, Prg4 GT mice do not have an altered rate of bone formation, and exogenous recombinant human PRG4 (rhPRG4) administration inhibited osteoclastogenesis in vitro, suggesting that the skeletal phenotype may be due to changes in bone resorption. Overall, this work demonstrates that PRG4 deficiency affects several integral properties of bone structure, mechanics, and skeletal cell activity, and provides the foundation and insight toward future work evaluating PRG4 as a potential therapeutic target in treating bone loss.
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Affiliation(s)
- Adam P Tanguay
- Department of Biomedical Engineering, UConn Health, Farmington, Connecticut, USA
| | - Nikhil G Menon
- Department of Biomedical Engineering, UConn Health, Farmington, Connecticut, USA
| | | | - Sandra Jastrzebski
- Department of Medicine, UConn Health, Farmington, Connecticut, USA
- Department of Orthopaedic Surgery, UConn Health, Farmington, Connecticut, USA
| | - Paige S Woods
- Department of Biomedical Engineering, UConn Health, Farmington, Connecticut, USA
| | - Erica A Doyle
- Department of Biomedical Engineering, UConn Health, Farmington, Connecticut, USA
| | - W Brent Edwards
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Gregory D Jay
- Department of Medicine, Brown University Warren Alpert Medical School, Providence, Rhode Island, USA
- Department of Engineering, Brown University Warren Alpert Medical School, Providence, Rhode Island, USA
| | - Alix C Deymier
- Department of Biomedical Engineering, UConn Health, Farmington, Connecticut, USA
| | - Joseph Lorenzo
- Department of Medicine, UConn Health, Farmington, Connecticut, USA
- Department of Orthopaedic Surgery, UConn Health, Farmington, Connecticut, USA
| | - Sun-Kyeong Lee
- Center on Aging, UConn Health, Farmington, Connecticut, USA
| | - Tannin A Schmidt
- Department of Biomedical Engineering, UConn Health, Farmington, Connecticut, USA
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4
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Hoekstra M, Snip OSC, Janusz P, Bernabé Kleijn MNA, Truitt ER, Sullivan BD, Schmidt TA, Jay GD, Van Eck M. Recombinant human proteoglycan 4 lowers inflammation and atherosclerosis susceptibility in female low-density lipoprotein receptor knockout mice. J Physiol 2024; 602:1939-1951. [PMID: 38606903 DOI: 10.1113/jp286354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/27/2024] [Indexed: 04/13/2024] Open
Abstract
Recombinant human proteoglycan 4 (rhPRG4) is a macromolecular mucin-like glycoprotein that is classically studied as a lubricant within eyes and joints. Given that endogenously produced PRG4 is present within atherosclerotic lesions and genetic PRG4 deficiency increases atherosclerosis susceptibility in mice, in the current study we investigated the anti-atherogenic potential of chronic rhPRG4 treatment. Female low-density lipoprotein receptor knockout mice were fed an atherogenic Western-type diet for 6 weeks and injected three times per week intraperitoneally with 0.5 mg rhPRG4 or PBS as control. Treatment with rhPRG4 was associated with a small decrease in plasma-free cholesterol levels, without a change in cholesteryl ester levels. A marked increase in the number of peritoneal foam cells was detected in response to the peritoneal rhPRG4 administration, which could be attributed to elevated peritoneal leukocyte MSR1 expression levels. However, rhPRG4-treated mice exhibited significantly smaller aortic root lesions of 278 ± 21 × 103 μm2 compared with 339 ± 15 × 103 μm2 in the aortic root of control mice. The overall decreased atherosclerosis susceptibility coincided with a shift in the monocyte and macrophage polarization states towards the patrolling and anti-inflammatory M2-like phenotypes, respectively. Furthermore, rhPRG4 treatment significantly reduced macrophage gene expression levels as well as plasma protein levels of the pro-inflammatory/pro-atherogenic cytokine TNF-alpha. In conclusion, we have shown that peritoneal administration and subsequent systemic exposure to rhPRG4 beneficially impacts the inflammatory state and reduces atherosclerosis susceptibility in mice. Our findings highlight that PRG4 is not only a lubricant but also acts as an anti-inflammatory agent. KEY POINTS: Endogenously produced proteoglycan 4 is found in atherosclerotic lesions and its genetic deficiency in mice is associated with enhanced atherosclerosis susceptibility. In this study we investigated the anti-atherogenic potential of chronic treatment with recombinant human PRG4 in hypercholesterolaemic female low-density lipoprotein receptor knockout mice. We show that recombinant human PRG4 stimulates macrophage foam cell formation, but also dampens the pro-inflammatory state of monocyte/macrophages, eventually leading to a significant reduction in plasma TNF-alpha levels and a lowered atherosclerosis susceptibility. Our findings highlight that peritoneal recombinant human PRG4 treatment can execute effects both locally and systemically and suggest that it will be of interest to study whether rhPRG4 treatment is also able to inhibit the progression and/or induce regression of previously established atherosclerotic lesions.
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Affiliation(s)
- Menno Hoekstra
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
- Division of Systems Pharmacology and Pharmacy, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
- Pharmacy Leiden, Leiden, The Netherlands
| | - Olga S C Snip
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
- Division of Systems Pharmacology and Pharmacy, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Philip Janusz
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Mireia N A Bernabé Kleijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | | | | | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Gregory D Jay
- Department of Emergency Medicine, Warren Alpert Medical School and Division of Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, USA
| | - Miranda Van Eck
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
- Division of Systems Pharmacology and Pharmacy, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
- Pharmacy Leiden, Leiden, The Netherlands
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5
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Martin-Alarcon L, Govedarica A, Ewoldt RH, Bryant SL, Jay GD, Schmidt TA, Trifkovic M. Scale-Dependent Rheology of Synovial Fluid Lubricating Macromolecules. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306207. [PMID: 38161247 DOI: 10.1002/smll.202306207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 11/20/2023] [Indexed: 01/03/2024]
Abstract
Synovial fluid (SF) is the complex biofluid that facilitates the exceptional lubrication of articular cartilage in joints. Its primary lubricating macromolecules, the linear polysaccharide hyaluronic acid (HA) and the mucin-like glycoprotein proteoglycan 4 (PRG4 or lubricin), interact synergistically to reduce boundary friction. However, the precise manner in which these molecules influence the rheological properties of SF remains unclear. This study aimed to elucidate this by employing confocal microscopy and multiscale rheometry to examine the microstructure and rheology of solutions containing recombinant human PRG4 (rhPRG4) and HA. Contrary to previous assumptions of an extensive HA-rhPRG4 network, it is discovered that rhPRG4 primarily forms stiff, gel-like aggregates. The properties of these aggregates, including their size and stiffness, are found to be influenced by the viscoelastic characteristics of the surrounding HA matrix. Consequently, the rheology of this system is not governed by a single length scale, but instead responds as a disordered, hierarchical network with solid-like rhPRG4 aggregates distributed throughout the continuous HA phase. These findings provide new insights into the biomechanical function of PRG4 in cartilage lubrication and may have implications in the development of HA-based therapies for joint diseases like osteoarthritis.
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Affiliation(s)
- Leonardo Martin-Alarcon
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Aleksandra Govedarica
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Randy H Ewoldt
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Steven L Bryant
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Gregory D Jay
- Department of Emergency Medicine - Warren Alpert Medical School & School of Engineering, Brown University, Providence, RI, 02912, USA
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
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6
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Menon NG, Tanguay AP, Zhou L, Zhang LX, Bobst CE, Han M, Ghosh M, Greene GW, Deymier A, Sullivan BD, Chen Y, Jay GD, Schmidt TA. A structural and functional comparison between two recombinant human lubricin proteins: Recombinant human proteoglycan-4 (rhPRG4) vs ECF843. Exp Eye Res 2023; 235:109643. [PMID: 37678729 PMCID: PMC10691279 DOI: 10.1016/j.exer.2023.109643] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/22/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023]
Abstract
Proteoglycan 4 (PRG4, lubricin) is a mucin-like glycoprotein present on the ocular surface that has both boundary lubricating and anti-inflammatory properties. Full-length recombinant human PRG4 (rhPRG4) has been shown to be clinically effective in improving signs and symptoms of dry eye disease (DED). In vitro, rhPRG4 has been shown to reduce inflammation-induced cytokine production and NFκB activity in corneal epithelial cells, as well as to bind to and inhibit MMP-9 activity. A different form of recombinant human lubricin (ECF843), produced from the same cell line as rhPRG4 but manufactured using a different process, was recently assessed in a DED clinical trial. However, ECF843 did not significantly improve signs or symptoms of DED compared to vehicle. Initial published characterization of ECF843 showed it had a smaller hydrodynamic diameter and was less negatively charged than native PRG4. Further examination of the structural and functional properties of ECF843 and rhPRG4 could contribute to the understanding of what led to their disparate clinical efficacy. Therefore, the objective of this study was to characterize and compare rhPRG4 and ECF843 in vitro, both biophysically and functionally. Hydrodynamic diameter and charge were measured by dynamic light scattering (DLS) and zeta potential, respectively. Size and molecular weight was determined for individual species by size exclusion chromatography (SEC) with in-line DLS and multi-angle light scattering (MALS). Bond structure was measured by Raman spectroscopy, and sedimentation properties were measured by analytical ultracentrifugation (AUC). Functionally, MMP-9 inhibition was measured using a commercial MMP-9 activity kit, coefficient of friction was measured using an established boundary lubrication test at a latex-glass interface, and collagen 1-binding ability was measured by quart crystal microbalance with dissipation (QCMD). Additionally, the ability of rhPRG4 and ECF843 to inhibit urate acid crystal formation and cell adhesion was assessed. ECF843 had a significantly smaller hydrodynamic diameter and was less negatively charged than rhPRG4, as assessed by DLS and zeta potential. Size was further explored with SEC-DLS-MALS, which indicated that while rhPRG4 had 3 main peaks, corresponding to monomer, dimer, and multimer as expected, ECF843 had 2 peaks that were similar in size and molecular weight compared to rhPRG4's monomer peak and a third peak that was significantly smaller in both size and molar mass than the corresponding peak of rhPRG4. Raman spectroscopy demonstrated that ECF843 had significantly more disulfide bonds, which are functionally determinant structures, relative to the carbon-carbon backbone compared to rhPRG4, and AUC indicated that ECF843 was more compact than rhPRG4. Functionally, ECF843 was significantly less effective at inhibiting MMP-9 activity and functioning as a boundary lubricant compared to rhPRG4, as well as being slower to bind to collagen 1. Additionally, ECF843 was significantly less effective at inhibiting urate acid crystal formation and at preventing cell adhesion. Collectively, these data demonstrate ECF843 and rhPRG4 are significantly different in both structure and function. Given that a protein's structure sets the foundation for its interactions with other molecules and tissues in vivo, which ultimately determine its function, these differences most likely contributed to the disparate DED clinical trial results.
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Affiliation(s)
- Nikhil G Menon
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - Adam P Tanguay
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - Libo Zhou
- Biomedical Engineering Department, University of Connecticut, Storrs, CT, USA
| | - Ling X Zhang
- Emergency Medicine, Brown University, Providence, RI, USA
| | - Cedric E Bobst
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, USA
| | - Mingyu Han
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science, Deakin University, Melbourne, Victoria, Australia; Commonwealth Scientific and Industrial Research Organization (CSIRO), Agriculture and Food, Werribee, Victoria, Australia
| | - Mallika Ghosh
- Department of Cell Biology, School of Medicine, UConn Health, Farmington, CT, USA
| | - George W Greene
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science, Deakin University, Melbourne, Victoria, Australia; Department of Chemistry and Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia
| | - Alix Deymier
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | | | - Yupeng Chen
- Biomedical Engineering Department, University of Connecticut, Storrs, CT, USA
| | - Gregory D Jay
- Emergency Medicine, Brown University, Providence, RI, USA
| | - Tannin A Schmidt
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA.
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7
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Zhu Q, Zhang Q, Fu DY, Su G. Polysaccharides in contact lenses: From additives to bulk materials. Carbohydr Polym 2023; 316:121003. [PMID: 37321708 DOI: 10.1016/j.carbpol.2023.121003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/26/2023] [Accepted: 05/07/2023] [Indexed: 06/17/2023]
Abstract
As the number of applications has increased, so has the demand for contact lenses comfort. Adding polysaccharides to lenses is a popular way to enhance comfort for wearers. However, this may also compromise some lens properties. It is still unclear how to balance the variation of individual lens parameters in the design of contact lenses containing polysaccharides. This review provides a comprehensive overview of how polysaccharide addition impacts lens wear parameters, such as water content, oxygen permeability, surface wettability, protein deposition, and light transmittance. It also examines how various factors, such as polysaccharide type, molecular weight, amount, and mode of incorporation into lenses modulate these effects. Polysaccharide addition can improve some wear parameters while reducing others depending on the specific conditions. The optimal method, type, and amount of added polysaccharides depend on the trade-off between various lens parameters and wear requirements. Simultaneously, polysaccharide-based contact lenses may be a promising option for biodegradable contact lenses as concerns regarding environmental risks associated with contact lens degradation continue to increase. It is hoped that this review will shed light on the rational use of polysaccharides in contact lenses to make personalized lenses more accessible.
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Affiliation(s)
- Qiang Zhu
- School of Pharmacy, Nantong University, Nantong 226001, China
| | - Qiao Zhang
- Department of Clinical Pharmacy, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Ding-Yi Fu
- School of Pharmacy, Nantong University, Nantong 226001, China
| | - Gaoxing Su
- School of Pharmacy, Nantong University, Nantong 226001, China.
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8
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Das N, de Almeida LGN, Derakhshani A, Young D, Mehdinejadiani K, Salo P, Rezansoff A, Jay GD, Sommerhoff CP, Schmidt TA, Krawetz R, Dufour A. Tryptase β regulation of joint lubrication and inflammation via proteoglycan-4 in osteoarthritis. Nat Commun 2023; 14:1910. [PMID: 37024468 PMCID: PMC10079686 DOI: 10.1038/s41467-023-37598-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 03/09/2023] [Indexed: 04/08/2023] Open
Abstract
PRG4 is an extracellular matrix protein that maintains homeostasis through its boundary lubricating and anti-inflammatory properties. Altered expression and function of PRG4 have been associated with joint inflammatory diseases, including osteoarthritis. Here we show that mast cell tryptase β cleaves PRG4 in a dose- and time-dependent manner, which was confirmed by silver stain gel electrophoresis and mass spectrometry. Tryptase-treated PRG4 results in a reduction of lubrication. Compared to full-length, cleaved PRG4 further activates NF-κB expression in cells overexpressing TLR2, -4, and -5. In the destabilization of the medial meniscus model of osteoarthritis in rat, tryptase β and PRG4 colocalize at the site of injury in knee cartilage and is associated with disease severity. When human primary synovial fibroblasts from male osteoarthritis patients or male healthy subjects treated with tryptase β and/or PRG4 are subjected to a quantitative shotgun proteomics and proteome changes are characterized, it further supports the role of NF-κB activation. Here we show that tryptase β as a modulator of joint lubrication in osteoarthritis via the cleavage of PRG4.
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Affiliation(s)
- Nabangshu Das
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Luiz G N de Almeida
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Afshin Derakhshani
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Daniel Young
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Kobra Mehdinejadiani
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Paul Salo
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Alexander Rezansoff
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Gregory D Jay
- Department of Emergency Medicine, Warren Alpert Medical School & School of Engineering, Brown University, Providence, RI, USA
| | - Christian P Sommerhoff
- Institute of Medical Education and Institute of Laboratory Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Tannin A Schmidt
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, CT, USA
| | - Roman Krawetz
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
- Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
| | - Antoine Dufour
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada.
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
- McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
- Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
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9
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Park S, Chin-Hun Kuo J, Reesink HL, Paszek MJ. Recombinant mucin biotechnology and engineering. Adv Drug Deliv Rev 2023; 193:114618. [PMID: 36375719 PMCID: PMC10253230 DOI: 10.1016/j.addr.2022.114618] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/14/2022] [Accepted: 11/04/2022] [Indexed: 11/13/2022]
Abstract
Mucins represent a largely untapped class of polymeric building block for biomaterials, therapeutics, and other biotechnology. Because the mucin polymer backbone is genetically encoded, sequence-specific mucins with defined physical and biochemical properties can be fabricated using recombinant technologies. The pendent O-glycans of mucins are increasingly implicated in immunomodulation, suppression of pathogen virulence, and other biochemical activities. Recent advances in engineered cell production systems are enabling the scalable synthesis of recombinant mucins with precisely tuned glycan side chains, offering exciting possibilities to tune the biological functionality of mucin-based products. New metabolic and chemoenzymatic strategies enable further tuning and functionalization of mucin O-glycans, opening new possibilities to expand the chemical diversity and functionality of mucin building blocks. In this review, we discuss these advances, and the opportunities for engineered mucins in biomedical applications ranging from in vitro models to therapeutics.
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Affiliation(s)
- Sangwoo Park
- Field of Biophysics, Cornell University, Ithaca, NY 14853, USA
| | - Joe Chin-Hun Kuo
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Heidi L Reesink
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Matthew J Paszek
- Field of Biophysics, Cornell University, Ithaca, NY 14853, USA; Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA; Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA.
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10
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Pendyala M, Woods PS, Brubaker DK, Blaber EA, Schmidt TA, Chan DD. Endogenous production of hyaluronan, PRG4, and cytokines is sensitive to cyclic loading in synoviocytes. PLoS One 2022; 17:e0267921. [PMID: 36576921 PMCID: PMC9797074 DOI: 10.1371/journal.pone.0267921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 12/09/2022] [Indexed: 12/29/2022] Open
Abstract
Synovial fluid is composed of hyaluronan and proteoglycan-4 (PRG4 or lubricin), which work synergistically to maintain joint lubrication. In diseases like osteoarthritis, hyaluronan and PRG4 concentrations can be altered, resulting in lowered synovial fluid viscosity, and pro-inflammatory cytokine concentrations within the synovial fluid increase. Synovial fibroblasts within the synovium are responsible for contributing to synovial fluid and can be targeted to improve endogenous production of hyaluronan and PRG4 and to alter the cytokine profile. We cyclically loaded SW982 synoviocytes to 0%, 5%, 10%, or 20% strain for three hours at 1 Hz. To assess the impact of substrate stiffness, we compared the 0% strain group to cells grown on tissue culture plastic. We measured the expression of hyaluronan turnover genes, hyaluronan localization within the cell layer, hyaluronan concentration, PRG4 concentration, and the cytokine profile within the media. Our results show that the addition of cyclic loading increased HAS3 expression, but not in a magnitude-dependent response. Hyaluronidase expression was impacted by strain magnitude, which is exemplified by the decrease in hyaluronan concentration due to cyclic loading. We also show that PRG4 concentration is increased at 5% strain, while higher strain magnitude decreases overall PRG4 concentration. Finally, 10% and 20% strain show a distinct, more pro-inflammatory cytokine profile when compared to the unloaded group. Multivariate analysis showed distinct separation between certain strain groups in being able to predict strain group, hyaluronan concentration, and PRG4 concentration from gene expression or cytokine concentration data, highlighting the complexity of the system. Overall, this study shows that cyclic loading can be used tool to modulate the endogenous production of hyaluronan, PRG4, and cytokines from synovial fibroblasts.
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Affiliation(s)
- Meghana Pendyala
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, United States of America
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, United States of America
| | - Paige S Woods
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Douglas K Brubaker
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, United States of America
- Regenstrief Center for Healthcare Engineering, Purdue University, West Lafayette, Indiana, United States of America
| | - Elizabeth A Blaber
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, United States of America
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, United States of America
- Blue Marble Space Institute of Science at NASA Ames Research Center, Moffett Field, California, United States of America
| | - Tannin A Schmidt
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Deva D Chan
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, United States of America
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, United States of America
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, United States of America
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11
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Recombinant lubricin improves anti-adhesive, wear protection, and lubrication of collagen II surface. Colloids Surf B Biointerfaces 2022; 220:112906. [DOI: 10.1016/j.colsurfb.2022.112906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/30/2022] [Accepted: 10/07/2022] [Indexed: 11/07/2022]
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12
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Recombinant Human Proteoglycan 4 (rhPRG4) Downregulates TNFα-Stimulated NFκB Activity and FAT10 Expression in Human Corneal Epithelial Cells. Int J Mol Sci 2022; 23:ijms232112711. [DOI: 10.3390/ijms232112711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 11/05/2022] Open
Abstract
Dry Eye Disease (DED) is a complex pathology affecting millions of people with significant impact on quality of life. Corneal inflammation, including via the nuclear factor kappa B (NFκB) pathway, plays a key etiological role in DED. Recombinant human proteoglycan 4 (rhPRG4) has been shown to be a clinically effective treatment for DED that has anti-inflammatory effects in corneal epithelial cells, but the underlying mechanism is still not understood. Our goal was to understand if rhPRG4 affects tumor necrosis factor α (TNFα)-stimulated inflammatory activity in corneal epithelial cells. We treated hTERT-immortalized corneal epithelial (hTCEpi) cells ± TNFα ± rhPRG4 and performed Western blotting on cell lysate and RNA sequencing. Bioinformatics analysis revealed that rhPRG4 had a significant effect on TNFα-mediated inflammation with potential effects on matricellular homeostasis. rhPRG4 reduced activation of key inflammatory pathways and decreased expression of transcripts for key inflammatory cytokines, interferons, interleukins, and transcription factors. TNFα treatment significantly increased phosphorylation and nuclear translocation of p65, and rhPRG4 significantly reduced both these effects. RNA sequencing identified human leukocyte antigen (HLA)-F adjacent transcript 10 (FAT10), a ubiquitin-like modifier protein which has not been studied in the context of DED, as a key pro-inflammatory transcript increased by TNFα and decreased by rhPRG4. These results were confirmed at the protein level. In summary, rhPRG4 is able to downregulate NFκB activity in hTCEpi cells, suggesting a potential biological mechanism by which it may act as a therapeutic for DED.
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13
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Huang S, Thomsson KA, Jin C, Ryberg H, Das N, Struglics A, Rolfson O, Björkman LI, Eisler T, Schmidt TA, Jay GD, Krawetz R, Karlsson NG. Truncated lubricin glycans in osteoarthritis stimulate the synoviocyte secretion of VEGFA, IL-8, and MIP-1α: Interplay between O-linked glycosylation and inflammatory cytokines. Front Mol Biosci 2022; 9:942406. [PMID: 36213120 PMCID: PMC9532613 DOI: 10.3389/fmolb.2022.942406] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/26/2022] [Indexed: 11/18/2022] Open
Abstract
The primary aim of the study was to identify inflammatory markers relevant for osteoarthritis (OA)-related systemic (plasma) and local (synovial fluid, SF) inflammation. From this, we looked for inflammatory markers that coincided with the increased amount of O-linked Tn antigen (GalNAcα1-Ser/Thr) glycan on SF lubricin. Inflammatory markers in plasma and SF in OA patients and controls were measured using a 44-multiplex immunoassay. We found consistently 29 markers detected in both plasma and SF. The difference in their concentration and the low correlation when comparing SF and plasma suggests an independent inflammatory environment in the two biofluids. Only plasma MCP-4 and TARC increased in our patient cohort compared to control plasma. To address the second task, we concluded that plasma markers were irrelevant for a direct connection with SF glycosylation. Hence, we correlated the SF-inflammatory marker concentrations with the level of altered glycosylation of SF-lubricin. We found that the level of SF-IL-8 and SF-MIP-1α and SF-VEGFA in OA patients displayed a positive correlation with the altered lubricin glycosylation. Furthermore, when exposing fibroblast-like synoviocytes from both controls and OA patients to glycovariants of recombinant lubricin, the secretion of IL-8 and MIP-1α and VEGFA were elevated using lubricin with Tn antigens, while lubricin with sialylated and nonsialylated T antigens had less or no measurable effect. These data suggest that truncated glycans of lubricin, as found in OA, promote synovial proinflammatory cytokine production and exacerbate local synovial inflammation.
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Affiliation(s)
- Shan Huang
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Kristina A. Thomsson
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Chunsheng Jin
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Henrik Ryberg
- Clinical Chemistry, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Nabangshu Das
- Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - André Struglics
- Department of Clinical Sciences Lund, Orthopaedics, Faculty of Medicine, Lund University, Lund, Sweden
| | - Ola Rolfson
- Department of Orthopaedics, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lena I. Björkman
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Thomas Eisler
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Tannin A. Schmidt
- Biomedical Engineering Department, University of Connecticut Health Centre, Farmington, CT, United States
| | - Gregory D. Jay
- Department of Emergency Medicine, Warren Alpert Medical School and Division of Biomedical Engineering, School of Engineering, Brown University, Providence, RI, United States
| | - Roman Krawetz
- Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Niclas G. Karlsson
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Pharmacy, Department of Life Sciences and Health, Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway
- *Correspondence: Niclas G. Karlsson,
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14
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Ghavami Shahri SH, Balali-Mood M, Heidarzadeh HR, Abrishami M. Ophthalmic Complications and Managements of Sulfur Mustard Exposure: A Narrative Review. ARCHIVES OF IRANIAN MEDICINE 2022; 25:647-657. [PMID: 37543890 PMCID: PMC10685765 DOI: 10.34172/aim.2022.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 05/23/2022] [Indexed: 08/07/2023]
Abstract
Sulfur mustard (SM) is a lethal chemical agent that affects many organs, particularly the eyes, respiratory system and skin. Even asymptomatic patients with documented SM vapor exposure may develop organ disorder many years later. Patients with even minor signs in the acute stage may experience late complications that necessitate surgery. Early decontamination and conservative measures could help the patients and decrease the complications. Despite decades of research, there is still no effective treatment for either acute or long-term SM-induced ocular complications. Even after multiple medications and surgical procedures, the majority of patients continue to have symptoms. For dry eye, punctual occlusion, autologous eye drops, and aggressive lubrication are used; for persistent epithelial defects (PED), tarsorrhaphy, amniotic membrane transplant, and stem cell transplantation are used; for total limbal stem cell deficiency (LSCD), living-related conjunctivolimbal allograft and keratolimbal allograft are used; for corneal vascularization, steroids, non-steroidal anti-inflammatory drugs, and anti-vascular endothelial growth factor prescribed; and for corneal opacities, corneal transplantation is done. Platelet rich plasma and topical drops containing stem cell transplantation for LSCD, photodynamic therapy paired with subconjunctival or topical anti-vascular endothelial growth factors for corneal vascularization, topical curcumin and topical ciclosporin-A for dry eye, and orbital fat-derived stem cells for PED are all alternative treatments that can be suggested. Despite the experimental and clinical research on the complications of SM exposure over the past decades, there is still no effective treatment for eye complications. However, supportive medical and surgical management has been applied with relatively good outcome.
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Affiliation(s)
| | - Mahdi Balali-Mood
- Medical Toxicology and Drug Abuse Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | | | - Mojtaba Abrishami
- Eye Research Center, Mashhad University of Medical Sciences, Birjand, Iran
- Ocular Oncology Service, Department of Ophthalmology and Visual Sciences, University of Toronto, Toronto, Canada
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15
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Mudigonda S, Shah S, Das N, Corpuz JM, Ninkovic N, Al-Jezani N, Underhill TM, Salo PT, Mitha AP, Lyons FG, Cho R, Schmidt TA, Dufour A, Krawetz RJ. Proteoglycan 4 is present within the dura mater and produced by mesenchymal progenitor cells. Cell Tissue Res 2022; 389:483-499. [PMID: 35704103 DOI: 10.1007/s00441-022-03647-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 06/02/2022] [Indexed: 11/25/2022]
Abstract
Mesenchymal progenitor cells (MPCs) have been recently identified in human and murine epidural fat and have been hypothesized to contribute to the maintenance/repair/regeneration of the dura mater. MPCs can secrete proteoglycan 4 (PRG4/lubricin), and this protein can regulate tissue homeostasis through bio-lubrication and immunomodulatory functions. MPC lineage tracing reporter mice (Hic1) and human epidural fat MPCs were used to determine if PRG4 is expressed by these cells in vivo. PRG4 expression co-localized with Hic1+ MPCs in the dura throughout skeletal maturity and was localized adjacent to sites of dural injury. When Hic1+ MPCs were ablated, PRG4 expression was retained in the dura, yet when Prx1+ MPCs were ablated, PRG4 expression was completely lost. A number of cellular processes were impacted in human epidural fat MPCs treated with rhPRG4, and human MPCs contributed to the formation of epidural fat, and dura tissues were xenotransplanted into mouse dural injuries. We have shown that human and mouse MPCs in the epidural/dura microenvironment produce PRG4 and can contribute to dura homeostasis/repair/regeneration. Overall, these results suggest that these MPCs have biological significance within the dural microenvironment and that the role of PRG4 needs to be further elucidated.
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Affiliation(s)
- Sathvika Mudigonda
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Sophia Shah
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada.,Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
| | - Nabangshu Das
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Jessica May Corpuz
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada.,Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
| | - Nicoletta Ninkovic
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Nedaa Al-Jezani
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - T Michael Underhill
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Paul T Salo
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada.,Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Alim P Mitha
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada.,Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Frank G Lyons
- Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Roger Cho
- Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, CT, USA
| | - Antoine Dufour
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada.,Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.,Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Roman J Krawetz
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada. .,Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada. .,Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada. .,Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
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16
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Russo MJ, Han M, Menon NG, Quigley AF, Kapsa RMI, Moulton SE, Guijt RM, M Silva S, Schmidt TA, Greene GW. Novel Boundary Lubrication Mechanisms from Molecular Pillows of Lubricin Brush-Coated Graphene Oxide Nanosheets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5351-5360. [PMID: 35465662 DOI: 10.1021/acs.langmuir.1c02970] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
There are numerous biomedical applications where the interfacial shearing of surfaces can cause wear and friction, which can lead to a variety of medical complications such as inflammation, irritation, and even bacterial infection. We introduce a novel nanomaterial additive comprised of two-dimensional graphene oxide nanosheets (2D-NSCs) coated with lubricin (LUB) to reduce the amount of tribological stress in biomedical settings, particularly at low shear rates where boundary lubrication dominates. LUB is a glycoprotein found in the articular joints of mammals and has recently been discovered as an ocular surface boundary lubricant. The ability of LUB to self-assemble into a "telechelic" brush layer on a variety of surfaces was exploited here to coat the top and bottom surfaces of the ultrathin 2D-NSCs in solution, effectively creating a biopolymer-coated nanosheet. A reduction in friction of almost an order of magnitude was measured at a bioinspired interface. This reduction was maintained after repeated washing (5×), suggesting that the large aspect ratio of the 2D-NSCs facilitates effective lubrication even at diluted concentrations. Importantly, and unlike LUB-only treatment, the lubrication effect can be eliminated over 15 rinsing cycles, suggesting that the LUB-coated 2D-NSCs do not exhibit any binding interactions with the shearing surfaces. The effective lubricating properties of the 2D-NSCs combined with full reversibility through rinsing make the LUB-coated 2D-NSCs an intriguing candidate as a lubricant for biomedical applications.
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Affiliation(s)
- Matthew J Russo
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science, Deakin University, Melbourne, Victoria 3216, Australia
- The Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Melbourne, Victoria 3065, Australia
| | - Mingyu Han
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science, Deakin University, Melbourne, Victoria 3216, Australia
| | - Nikhil G Menon
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, Connecticut 06030 United States
| | - Anita F Quigley
- School of Electrical and Biomedical Engineering, RMIT University, Melbourne, Victoria 3000, Australia
- The Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Melbourne, Victoria 3065, Australia
| | - Robert M I Kapsa
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Wollongong, New South Wales 2522, Australia
- The Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Melbourne, Victoria 3065, Australia
| | - Simon E Moulton
- ARC Centre of Excellence for Electromaterials Science, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, Victoria 3122, Australia
- The Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Melbourne, Victoria 3065, Australia
- Iverson Health Innovation Research Institute, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
| | - Rosanne M Guijt
- Centre for Regional and Rural Futures, Deakin University, Geelong, Victoria 3220, Australia
| | - Saimon M Silva
- ARC Centre of Excellence for Electromaterials Science, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, Victoria 3122, Australia
- The Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Melbourne, Victoria 3065, Australia
- Iverson Health Innovation Research Institute, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
| | - Tannin A Schmidt
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, Connecticut 06030 United States
| | - George W Greene
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science, Deakin University, Melbourne, Victoria 3216, Australia
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17
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Yang DS, Dickerson EE, Zhang LX, Richendrfer H, Karamchedu PN, Badger GJ, Schmidt TA, Fredericks AM, Elsaid KA, Jay GD. Quadruped Gait and Regulation of Apoptotic Factors in Tibiofemoral Joints following Intra-Articular rhPRG4 Injection in Prg4 Null Mice. Int J Mol Sci 2022; 23:ijms23084245. [PMID: 35457064 PMCID: PMC9025840 DOI: 10.3390/ijms23084245] [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: 03/31/2022] [Accepted: 04/06/2022] [Indexed: 12/03/2022] Open
Abstract
Camptodactyly-arthropathy-coxa vara-pericarditis (CACP) syndrome leads to diarthrodial joint arthropathy and is caused by the absence of lubricin (proteoglycan 4—PRG4), a surface-active mucinous glycoprotein responsible for lubricating articular cartilage. In this study, mice lacking the orthologous gene Prg4 served as a model that recapitulates the destructive arthrosis that involves biofouling of cartilage by serum proteins in lieu of Prg4. This study hypothesized that Prg4-deficient mice would demonstrate a quadruped gait change and decreased markers of mitochondrial dyscrasia, following intra-articular injection of both hindlimbs with recombinant human PRG4 (rhPRG4). Prg4−/− (N = 44) mice of both sexes were injected with rhPRG4 and gait alterations were studied at post-injection day 3 and 6, before joints were harvested for immunohistochemistry for caspase-3 activation. Increased stance and propulsion was shown at 3 days post-injection in male mice. There were significantly fewer caspase-3-positive chondrocytes in tibiofemoral cartilage from rhPRG4-injected mice. The mitochondrial gene Mt-tn, and myosin heavy (Myh7) and light chains (Myl2 and Myl3), known to play a cytoskeletal stabilizing role, were significantly upregulated in both sexes (RNA-Seq) following IA rhPRG4. Chondrocyte mitochondrial dyscrasias attributable to the arthrosis in CACP may be mitigated by IA rhPRG4. In a supporting in vitro crystal microbalance experiment, molecular fouling by albumin did not block the surface activity of rhPRG4.
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Affiliation(s)
- Daniel S. Yang
- School of Engineering, Brown University, Providence, RI 02912, USA; (D.S.Y.); (G.D.J.)
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Edward E. Dickerson
- North Carolina Agricultural Technical State University, Greensboro, NC 27411, USA;
| | - Ling X. Zhang
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Holly Richendrfer
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Padmini N. Karamchedu
- Department of Orthopedics, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
| | - Gary J. Badger
- Department of Medical Biostatistics, Larner College of Medicine, University of Vermont, Burlington, VT 05405, USA;
| | - Tannin A. Schmidt
- Department of Biomedical Engineering, School of Dental Medicine, University of Connecticut Health, Farmington, CT 06030, USA;
| | - Alger M. Fredericks
- Department of Surgery, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
| | - Khaled A. Elsaid
- School of Pharmacy, Chapman University, Irvine, CA 92618, USA
- Correspondence:
| | - Gregory D. Jay
- School of Engineering, Brown University, Providence, RI 02912, USA; (D.S.Y.); (G.D.J.)
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
- Department of Orthopedics, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
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18
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ElSayed S, Jay GD, Cabezas R, Qadri M, Schmidt TA, Elsaid KA. Recombinant Human Proteoglycan 4 Regulates Phagocytic Activation of Monocytes and Reduces IL-1β Secretion by Urate Crystal Stimulated Gout PBMCs. Front Immunol 2022; 12:771677. [PMID: 34992596 PMCID: PMC8725049 DOI: 10.3389/fimmu.2021.771677] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 11/30/2021] [Indexed: 12/15/2022] Open
Abstract
Objectives To compare phagocytic activities of monocytes in peripheral blood mononuclear cells (PBMCs) from acute gout patients and normal subjects, examine monosodium urate monohydrate (MSU) crystal-induced IL-1β secretion ± recombinant human proteoglycan 4 (rhPRG4) or interleukin-1 receptor antagonist (IL-1RA), and study the anti-inflammatory mechanism of rhPRG4 in MSU stimulated monocytes. Methods Acute gout PBMCs were collected from patients in the Emergency Department and normal PBMCs were obtained from a commercial source. Monocytes in PBMCs were identified by flow cytometry. PBMCs were primed with Pam3CSK4 (1μg/mL) for 24h and phagocytic activation of monocytes was determined using fluorescently labeled latex beads. MSU (200μg/mL) stimulated IL-1β secretion was determined by ELISA. Reactive oxygen species (ROS) generation in monocytes was determined fluorometrically. PBMCs were incubated with IL-1RA (250ng/mL) or rhPRG4 (200μg/mL) and bead phagocytosis by monocytes was determined. THP-1 monocytes were treated with MSU crystals ± rhPRG4 and cellular levels of NLRP3 protein, pro-IL-1β, secreted IL-1β, and activities of caspase-1 and protein phosphatase-2A (PP2A) were quantified. The peritoneal influx of inflammatory and anti-inflammatory monocytes and neutrophils in Prg4 deficient mice was studied and the impact of rhPRG4 on immune cell trafficking was assessed. Results Enhanced phagocytic activation of gout monocytes under basal conditions (p<0.001) was associated with ROS generation and MSU stimulated IL-1β secretion (p<0.05). rhPRG4 reduced bead phagocytosis by normal and gout monocytes compared to IL-1RA and both treatments were efficacious in reducing IL-1β secretion (p<0.05). rhPRG4 reduced pro-IL-1β content, caspase-1 activity, conversion of pro-IL-1β to mature IL-1β and restored PP2A activity in monocytes (p<0.05). PP2A inhibition reversed rhPRG4’s effects on pro-IL-1β and mature IL-1β in MSU stimulated monocytes. Neutrophils accumulated in peritoneal cavities of Prg4 deficient mice (p<0.01) and rhPRG4 treatment reduced neutrophil accumulation and enhanced anti-inflammatory monocyte influx (p<0.05). Conclusions MSU phagocytosis was higher in gout monocytes resulting in higher ROS and IL-1β secretion. rhPRG4 reduced monocyte phagocytic activation to a greater extent than IL-1RA and reduced IL-1β secretion. The anti-inflammatory activity of rhPRG4 in monocytes is partially mediated by PP2A, and in vivo, PRG4 plays a role in regulating the trafficking of immune cells into the site of a gout flare.
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Affiliation(s)
- Sandy ElSayed
- Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA, United States
| | - Gregory D Jay
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, United States
| | - Ralph Cabezas
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, United States
| | - Marwa Qadri
- Department of Pharmacology, School of Pharmacy, Jazan University, Jazan, Saudi Arabia
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, CT, United States
| | - Khaled A Elsaid
- Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA, United States
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Qadri M, Jay GD, Zhang LX, Schmidt TA, Totonchy J, Elsaid KA. Proteoglycan-4 is an essential regulator of synovial macrophage polarization and inflammatory macrophage joint infiltration. Arthritis Res Ther 2021; 23:241. [PMID: 34521469 PMCID: PMC8439011 DOI: 10.1186/s13075-021-02621-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 09/05/2021] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Synovial macrophages perform a multitude of functions that include clearance of cell debris and foreign bodies, tissue immune surveillance, and resolution of inflammation. The functional diversity of macrophages is enabled by distinct subpopulations that express unique surface markers. Proteoglycan-4 (PRG4) is an important regulator of synovial hyperplasia and fibrotic remodeling, and the involvement of macrophages in PRG4's synovial role is yet to be defined. Our objectives were to study the PRG4's importance to macrophage homeostatic regulation in the synovium and infiltration of pro-inflammatory macrophages in acute synovitis and investigate whether macrophages mediated synovial fibrosis in Prg4 gene-trap (Prg4GT/GT) murine knee joints. METHODS Macrophage phenotyping in Prg4GT/GT and Prg4+/+ joints was performed by flow cytometry using pan-macrophage markers, e.g., CD11b, F4/80, and surface markers of M1 macrophages (CD86) and M2 macrophages (CD206). Characterizations of the various macrophage subpopulations were performed in 2- and 6-month-old animals. The expression of inflammatory markers, IL-6, and iNOS in macrophages that are CD86+ and/or CD206+ was studied. The impact of Prg4 recombination on synovial macrophage populations of 2- and 6-month-old animals and infiltration of pro-inflammatory macrophages in response to a TLR2 agonist challenge was determined. Macrophages were depleted using liposomal clodronate and synovial membrane thickness, and the expression of fibrotic markers α-SMA, PLOD2, and collagen type I (COL-I) was assessed using immunohistochemistry. RESULTS Total macrophages in Prg4GT/GT joints were higher than Prg4+/+ joints (p<0.0001) at 2 and 6 months, and the percentages of CD86+/CD206- and CD86+/CD206+ macrophages increased in Prg4GT/GT joints at 6 months (p<0.0001), whereas the percentage of CD86-/CD206+ macrophages decreased (p<0.001). CD86+/CD206- and CD86+/CD206+ macrophages expressed iNOS and IL-6 compared to CD86-/CD206+ macrophages (p<0.0001). Prg4 re-expression limited the accumulation of CD86+ macrophages (p<0.05) and increased CD86-/CD206+ macrophages (p<0.001) at 6 months. Prg4 recombination attenuated synovial recruitment of pro-inflammatory macrophages in 2-month-old animals (p<0.001). Clodronate-mediated macrophage depletion reduced synovial hyperplasia, α-SMA, PLOD2, and COL-I expressions in the synovium (p<0.0001). CONCLUSIONS PRG4 regulates the accumulation and homeostatic balance of macrophages in the synovium. In its absence, the synovium becomes populated with M1 macrophages. Furthermore, macrophages exert an effector role in synovial fibrosis in Prg4GT/GT animals.
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Affiliation(s)
- Marwa Qadri
- Department of Pharmacology, College of Pharmacy, Jazan University, Jazan, 82826 Kingdom of Saudi Arabia
| | - Gregory D. Jay
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI USA
| | - Ling X. Zhang
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI USA
| | - Tannin A. Schmidt
- Biomedical Engineering Department, School of Dental Medicine, University of Connecticut, Farmington, CT USA
| | - Jennifer Totonchy
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Rinker Health Sciences Campus, 9401 Jeronimo Road, Irvine, CA 92618 USA
| | - Khaled A. Elsaid
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Rinker Health Sciences Campus, 9401 Jeronimo Road, Irvine, CA 92618 USA
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20
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Menon NG, Goyal R, Lema C, Woods PS, Tanguay AP, Morin AA, Das N, Jay GD, Krawetz RJ, Dufour A, Shapiro LH, Redfern RL, Ghosh M, Schmidt TA. Proteoglycan 4 (PRG4) expression and function in dry eye associated inflammation. Exp Eye Res 2021; 208:108628. [PMID: 34048779 DOI: 10.1016/j.exer.2021.108628] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 04/30/2021] [Accepted: 05/17/2021] [Indexed: 12/21/2022]
Abstract
Dry eye disease (DED) affects hundreds of millions of people worldwide. It is characterized by the production of inflammatory cytokines and chemokines as well as damaging matrix metalloproteinases (MMPs) at the ocular surface. While proteoglycan 4 (PRG4), a mucin-like glycoprotein present at the ocular surface, is most well known as a boundary lubricant that contributes to ocular surface integrity, it has been shown to blunt inflammation in various cell types, suggesting a dual mechanism of action. Recently, full-length recombinant human PRG4 (rhPRG4) has been shown to improve signs and symptoms of DED in humans. However, there remains a significant need for basic science research on rhPRG4's biological properties and its potential therapeutic mechanisms of action in treating DED. Therefore, the objectives of this study were to characterize endogenous PRG4 expression by telomerase-immortalized human corneal epithelial (hTCEpi) cells, examine whether exogenous rhPRG4 modulates cytokine and chemokine secretion in response to dry eye associated inflammation (TNFα and IL-1β), explore interactions between rhPRG4 and MMP-9, and understand how experimental dry eye (EDE) in mice affects PRG4 expression. PRG4 secretion from hTCEpi cells was quantified by Western blot and expression visualized by immunocytochemistry. Cytokine/chemokine production was measured by ELISA and Luminex, while rhPRG4's effect on MMP-9 activity, binding, and expression was quantified using an MMP-9 inhibitor kit, surface plasmon resonance, and reverse transcription polymerase chain reaction (RT-PCR), respectively. Finally, EDE was induced in mice, and PRG4 was visualized by immunohistochemistry in the cornea and by Western blot in lacrimal gland lysate. In vitro results demonstrate that hTCEpi cells synthesize and secrete PRG4, and PRG4 secretion is inhibited by TNFα and IL-1β. In response to these pro-inflammatory stresses, exogenous rhPRG4 significantly reduced the stimulated production of IP-10, RANTES, ENA-78, GROα, MIP-3α, and MIG, and trended towards a reduction of MIP-1α and MIP-1β. The hTCEpi cells were also able to internalize fluorescently-labelled rhPRG4, consistent with a mechanism of action that includes downstream biological signaling pathways. rhPRG4 was not digested by MMP-9, and it did not modulate MMP-9 gene expression in hTCEpi cells, but it was able to bind to MMP-9 and inhibited in vitro activity of exogenous MMP-9 in the presence of human tears. Finally, in vivo results demonstrate that EDE significantly decreased immunolocalization of PRG4 on the corneal epithelium and trended towards a reduction of PRG4 in lacrimal gland lysate. Collectively these results demonstrate rhPRG4 has anti-inflammatory properties on corneal epithelial cells, particularly as it relates to mitigating chemokine production, and is an inhibitor of MMP-9 activity, as well as that in vivo expression of PRG4 can be altered in preclinical models of DED. In conclusion, these findings contribute to our understanding of PRG4's immunomodulatory properties in the context of DED inflammation and provide the foundation and motivation for further mechanistic research of PRG4's properties on the ocular surface as well as expanding clinical evaluation of its ability as a multifunctional therapeutic agent to effectively provide relief to those who suffer from DED.
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Affiliation(s)
- Nikhil G Menon
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - Ruchi Goyal
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - Carolina Lema
- The Ocular Surface Institute, College of Optometry, University of Houston, Houston, TX, USA
| | - Paige S Woods
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - Adam P Tanguay
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - Alyssa A Morin
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - Nabangshu Das
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Gregory D Jay
- Department of Emergency Medicine, Warren Alpert Medical School & School of Engineering, Brown University, Providence, RI, USA
| | - Roman J Krawetz
- Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Antoine Dufour
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada; Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Linda H Shapiro
- Department of Cell Biology, School of Medicine, UConn Health, Farmington, CT, USA
| | - Rachel L Redfern
- The Ocular Surface Institute, College of Optometry, University of Houston, Houston, TX, USA
| | - Mallika Ghosh
- Department of Cell Biology, School of Medicine, UConn Health, Farmington, CT, USA
| | - Tannin A Schmidt
- Biomedical Engineering Department, School of Dental Medicine, UConn Health, Farmington, CT, USA.
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21
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Korogiannaki M, Samsom M, Matheson A, Soliman K, Schmidt TA, Sheardown H. Investigating the Synergistic Interactions of Surface Immobilized and Free Natural Ocular Lubricants for Contact Lens Applications: A Comparative Study between Hyaluronic Acid and Proteoglycan 4 (Lubricin). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1062-1072. [PMID: 33434030 DOI: 10.1021/acs.langmuir.0c02796] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The main reasons for the discontinuation of contact lens wear are ocular dryness and discomfort. Proteoglycan 4 (PRG4), a mucinous glycoprotein, and hyaluronic acid (HA), a nonsulfated linear glycosaminoglycan, are naturally present in the eye and contribute to ocular hydration and lubrication. This study aimed to investigate the impact of the structure of the recombinant human PRG4 (rhPRG4)/HA complex on contact lens properties, when one agent is grafted and the counterpart is physisorbed on the surface of model conventional or silicone contact lens materials. Investigation of the wettability, water retention, antifouling, and boundary lubricant properties of the prepared hydrogels showed that the rhPRG4/HA interactions varied with the rhPRG/HA configuration on the hydrogel surface as well as the composition of the underlying substrate used. The rhPRG4-physisorbed/HA-grafted sample was characterized by better antifouling and boundary lubricant properties on the model conventional hydrogels, while the HA-physisorbed/rhPRG4-grafted sample exhibited improved surface wettability, antifouling, and water-retentive properties on the model silicone hydrogels. The results of this study contribute to the design of biomimetic contact lens surfaces that work synergistically with ocular fluid-phase biological agents to enhance compatibility between the contact lens and the ocular environment, alleviating dry eye symptoms and improving comfort.
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Affiliation(s)
- Myrto Korogiannaki
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Michael Samsom
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Austyn Matheson
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Karim Soliman
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, Connecticut 06030, United States
| | - Heather Sheardown
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
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22
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Matheson A, Regmi SC, Jay GD, Schmidt TA, Scott WM. The Effect of Intense Exercise on Equine Serum Proteoglycan-4/Lubricin. Front Vet Sci 2020; 7:599287. [PMID: 33392293 PMCID: PMC7772952 DOI: 10.3389/fvets.2020.599287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/18/2020] [Indexed: 11/20/2022] Open
Abstract
Objective: Local biological and biomechanical-stimuli modulate proteoglycan-4 secretion within synovial joints. For the horse, changes to proteoglycan-4 concentration and function are notable in acute joint injury and osteoarthritis. Proteoglycan-4 (also known as Lubricin) is present in the blood, however the effect of exercise on equine serum levels is unknown. The overall objective of this study was, therefore, to investigate the effect of intense exercise on serum proteoglycan-4 in thoroughbred horses. Methods: Samples of blood were taken from thoroughbreds (n = 12) during a chuckwagon racing event (Alberta, Canada). The chuckwagon race is a sprint racing event where teams of horses pull a combined 1,325 lbs (601 kg) of wagon and driver around a 5/8th mile (1 km) of dirt track, racing at full gallop to the finish. Blood samples were collected 30-min before the race start, and several timepoints post-race: 5-min, 90-min, 3-h, 12-h, and 23-h. Proteoglycan-4 concentrations in serum were quantified by enzyme-linked-immunosorbent-assay using recombinant-human proteoglycan-4 standards and anti-proteoglycan-4 mAb 9G3. The molecular weight of immunoreactive proteoglycan-4 in serum was assessed by western blot. Results: Proteoglyan-4 in serum demonstrated the expected high MW immunoreactivity to mAb 9G3, consistent with that of full length PRG4. Serum proteoglycan-4 decreased five-minutes post-race from baseline concentration (0.815 ± 0.175 to 0.466 ± 0.090 μg/mL, μ ± SEM, p < 0.01). Conclusions: The concentration of serum proteoglycan-4 in horses decreased significantly five min post-exercise. A potential explanation for this finding could be increased proteoglycan-4 clearance from the circulation. Further investigations could extend to complete the detailed characterization of proteoglycan-4 structure and its potential function within the blood as it relates to joint health and exercise.
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Affiliation(s)
- Austyn Matheson
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
| | - Suresh C Regmi
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
| | - Gregory D Jay
- Department of Emergency Medicine, Warren Alpert Medical School & School of Engineering, Brown University, Providence, RI, United States
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, CT, United States
| | - W Michael Scott
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada.,Department of Veterinary Clinical and Diagnostic Sciences, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
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24
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Watkins AR, Reesink HL. Lubricin in experimental and naturally occurring osteoarthritis: a systematic review. Osteoarthritis Cartilage 2020; 28:1303-1315. [PMID: 32504786 PMCID: PMC8043104 DOI: 10.1016/j.joca.2020.05.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 04/28/2020] [Accepted: 05/13/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Lubricin is increasingly being evaluated as an outcome measure in studies investigating post-traumatic and naturally occurring osteoarthritis. However, there are discrepancies in results, making it unclear as to whether lubricin is increased, decreased or unchanged in osteoarthritis. The purpose of this study was to review all papers that measured lubricin in joint injury or osteoarthritis in order to draw conclusions about lubricin regulation in joint disease. DESIGN A systematic search of the Pubmed, Web of Knowledge, and EBSCOhost databases for papers was performed. Inclusion criteria were in vivo studies that measured lubricin in humans or animals with joint injury, that investigated lubricin supplementation in osteoarthritic joints, or that described the phenotype of a lubricin knock-out model. A methodological assessment was performed. RESULTS Sixty-two studies were included, of which thirty-eight measured endogenous lubricin in joint injury or osteoarthritis. Nineteen papers found an increase or no change in lubricin and nineteen reported a decrease. Papers that reported a decrease in lubricin were cited four times more often than those that reported an increase. Fifteen papers described lubricin supplementation, and all reported a beneficial effect. Eleven papers described lubricin knock-out models. CONCLUSIONS The human literature reveals similar distributions of papers reporting increased lubricin as compared to decreased lubricin in osteoarthritis. The animal literature is dominated by reports of decreased lubricin in the rat anterior cruciate ligament transection model, whereas studies in large animal models report increased lubricin. Intra-articular lubricin supplementation may be beneficial regardless of whether lubricin increases or decreases in OA.
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Affiliation(s)
- A R Watkins
- Department of Clinical Sciences, University of Pennsylvania School of Veterinary Medicine, New Bolton Center, Kennett Square, PA, USA
| | - H L Reesink
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
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Flowers SA, Thomsson KA, Ali L, Huang S, Mthembu Y, Regmi SC, Holgersson J, Schmidt TA, Rolfson O, Björkman LI, Sundqvist M, Karlsson-Bengtsson A, Jay GD, Eisler T, Krawetz R, Karlsson NG. Decrease of core 2 O-glycans on synovial lubricin in osteoarthritis reduces galectin-3 mediated crosslinking. J Biol Chem 2020; 295:16023-16036. [PMID: 32928962 DOI: 10.1074/jbc.ra120.012882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 09/11/2020] [Indexed: 11/06/2022] Open
Abstract
The synovial fluid glycoprotein lubricin (also known as proteoglycan 4) is a mucin-type O-linked glycosylated biological lubricant implicated to be involved in osteoarthritis (OA) development. Lubricin's ability to reduce friction is related to its glycosylation consisting of sialylated and unsialylated Tn-antigens and core 1 and core 2 structures. The glycans on lubricin have also been suggested to be involved in crosslinking and stabilization of the lubricating superficial layer of cartilage by mediating interaction between lubricin and galectin-3. However, with the spectrum of glycans being found on lubricin, the glycan candidates involved in this interaction were unknown. Here, we confirm that the core 2 O-linked glycans mediate this lubricin-galectin-3 interaction, shown by surface plasmon resonance data indicating that recombinant lubricin (rhPRG4) devoid of core 2 structures did not bind to recombinant galectin-3. Conversely, transfection of Chinese hamster ovary cells with the core 2 GlcNAc transferase acting on a mucin-type O-glycoprotein displayed increased galectin-3 binding. Both the level of galectin-3 and the galectin-3 interactions with synovial lubricin were found to be decreased in late-stage OA patients, coinciding with an increase in unsialylated core 1 O-glycans (T-antigens) and Tn-antigens. These data suggest a defect in crosslinking of surface-active molecules in OA and provide novel insights into OA molecular pathology.
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Affiliation(s)
- Sarah A Flowers
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Kristina A Thomsson
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Liaqat Ali
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Shan Huang
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Yolanda Mthembu
- Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Suresh C Regmi
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Jan Holgersson
- Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Ola Rolfson
- Department of Orthopaedics, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lena I Björkman
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Martina Sundqvist
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Karlsson-Bengtsson
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Chalmers University of Technology, Gothenburg, Sweden
| | - Gregory D Jay
- Department of Emergency Medicine, Warren Alpert Medical School and Division of Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, USA
| | - Thomas Eisler
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institute, Stockholm, Sweden
| | - Roman Krawetz
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada
| | - Niclas G Karlsson
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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Serum Glycoproteomic Alterations in Patients with Diabetic Retinopathy. Proteomes 2020; 8:proteomes8030025. [PMID: 32933222 PMCID: PMC7565786 DOI: 10.3390/proteomes8030025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 09/09/2020] [Accepted: 09/09/2020] [Indexed: 12/19/2022] Open
Abstract
The precise molecular mechanisms of diabetic retinopathy (DR) pathogenesis are unclear, and treatment options are limited. There is an urgent need to discover and develop novel therapeutic targets for the treatment of this disease. Glycosylation is a post-translational modification that plays a critical role in determining protein structure, function, and stability. Recent studies have found that serum glycoproteomic changes are associated with the presence or progression of several inflammatory diseases. However, very little is known about the glycoproteomic changes associated with DR. In this study, glycoproteomic profiling of the serum of diabetic patients with and without DR was performed. A total of 15 glycopeptides from 11 glycoproteins were found to be significantly altered (5 upregulated and 10 downregulated) within the serum glycoproteome of DR patients. These glycoproteins are known to be involved in the maintenance of the extracellular matrix and complement system through peptidolytic activity or regulation.
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Abstract
PURPOSE Lubricin, a boundary lubricant, is the body's unique antiadhesive, antifibrotic, antifriction, and antiinflammatory glycoprotein. This amphiphile is produced by numerous tissues and acts to regulate a number of processes, such as homeostasis, shear stress, tissue development, innate immunity, inflammation, and wound healing. We hypothesize that lubricin is also synthesized and expressed by the amniotic membrane (AM), which also possesses antiadhesive, antifibrotic, and antiinflammatory properties. We also hypothesize that lubricin, at least in part, mediates these AM capabilities. Our goal was to test our hypothesis. METHODS We obtained multiple samples of fresh, cryopreserved (CP), and freeze-dried (FD) human AMs, as well as fresh placental tissue as positive controls, and processed them for light microscopy, immunofluorescence, and western blot analyses. We also evaluated the ability of recombinant human lubricin to associate with FD-AMs. RESULTS Our results demonstrate that all fresh placental, fresh AM, and CP-AM samples contained lubricin. Lubricin was expressed in placental chorionic villi, AM epithelial and stromal cells, and CP-AM epithelia. No lubricin could be detected in FD-AMs but could be restored in FD-AMs after overnight incubation with recombinant human lubricin. CONCLUSIONS This study supports our hypothesis that lubricin is expressed in human AMs. In addition, our data show that preservation methods influence the extent of this expression. Indeed, the disappearance of lubricin in FD-AMs may explain why dried AM reportedly loses its antiinflammatory and antiscarring abilities. It is possible that lubricin may mediate, at least in part, many of the biological properties of AMs.
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Qadri M, Jay GD, Zhang LX, Richendrfer H, Schmidt TA, Elsaid KA. Proteoglycan-4 regulates fibroblast to myofibroblast transition and expression of fibrotic genes in the synovium. Arthritis Res Ther 2020; 22:113. [PMID: 32404156 PMCID: PMC7222325 DOI: 10.1186/s13075-020-02207-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/30/2020] [Indexed: 12/19/2022] Open
Abstract
Background Synovial tissue fibrosis is common in advanced OA with features including the presence of stress fiber-positive myofibroblasts and deposition of cross-linked collagen type-I. Proteoglycan-4 (PRG4) is a mucinous glycoprotein secreted by synovial fibroblasts and is a major component of synovial fluid. PRG4 is a ligand of the CD44 receptor. Our objective was to examine the role of PRG4-CD44 interaction in regulating synovial tissue fibrosis in vitro and in vivo. Methods OA synoviocytes were treated with TGF-β ± PRG4 for 24 h and α-SMA content was determined using immunofluorescence. Rhodamine-labeled rhPRG4 was incubated with OA synoviocytes ± anti-CD44 or isotype control antibodies and cellular uptake of rhPRG4 was determined following a 30-min incubation and α-SMA expression following a 24-h incubation. HEK-TGF-β cells were treated with TGF-β ± rhPRG4 and Smad3 phosphorylation was determined using immunofluorescence and TGF-β/Smad pathway activation was determined colorimetrically. We probed for stress fibers and focal adhesions (FAs) in TGF-β-treated murine fibroblasts and fibroblast migration was quantified ± rhPRG4. Synovial expression of fibrotic markers: α-SMA, collagen type-I, and PLOD2 in Prg4 gene-trap (Prg4GT) and recombined Prg4GTR animals were studied at 2 and 9 months of age. Synovial expression of α-SMA and PLOD2 was determined in 2-month-old Prg4GT/GT&Cd44−/− and Prg4GTR/GTR&Cd44−/− animals. Results PRG4 reduced α-SMA content in OA synoviocytes (p < 0.001). rhPRG4 was internalized by OA synoviocytes via CD44 and CD44 neutralization attenuated rhPRG4’s antifibrotic effect (p < 0.05). rhPRG4 reduced pSmad3 signal in HEK-TGF-β cells (p < 0.001) and TGF-β/Smad pathway activation (p < 0.001). rhPRG4 reduced the number of stress fiber-positive myofibroblasts, FAs mean size, and cell migration in TGF-β-treated NIH3T3 fibroblasts (p < 0.05). rhPRG4 inhibited fibroblast migration in a macrophage and fibroblast co-culture model without altering active or total TGF-β levels. Synovial tissues of 9-month-old Prg4GT/GT animals had higher α-SMA, collagen type-I, and PLOD2 (p < 0.001) content and Prg4 re-expression reduced these markers (p < 0.01). Prg4 re-expression also reduced α-SMA and PLOD2 staining in CD44-deficient mice. Conclusion PRG4 is an endogenous antifibrotic modulator in the joint and its effect on myofibroblast formation is partially mediated by CD44, but CD44 is not required to demonstrate an antifibrotic effect in vivo.
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Affiliation(s)
- Marwa Qadri
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Rinker Health Sciences Campus, 9401 Jeronimo Road, Irvine, CA, 92618, USA.,Department of Pharmacology, College of Pharmacy, Jazan University, Jazan, 82826, Saudi Arabia
| | - Gregory D Jay
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, USA
| | - Ling X Zhang
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, USA
| | - Holly Richendrfer
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, USA
| | - Tannin A Schmidt
- Biomedical Engineering Department, School of Dental Medicine, University of Connecticut, Farmington, CT, USA
| | - Khaled A Elsaid
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Rinker Health Sciences Campus, 9401 Jeronimo Road, Irvine, CA, 92618, USA.
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Han M, Silva SM, Lei W, Quigley A, Kapsa RMI, Moulton SE, Greene GW. Adhesion and Self-Assembly of Lubricin (PRG4) Brush Layers on Different Substrate Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:15834-15848. [PMID: 31355643 DOI: 10.1021/acs.langmuir.9b01809] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Lubricin (LUB, aka PRG4), a mucin-like glycoprotein, is best known for the significant role it plays in the boundary lubrication, wear protection, and adhesion control systems in human joints. However, LUB exhibits a number of diverse and useful properties, including a remarkable ability to self-assemble into a telechelic brush structure onto virtually any substrate. This self-assembly behavior has spawned the emergence of numerous nontraditional applications of LUB coatings in numerous areas such as microfluidics, electrochemical sensors, contact lenses, antifouling surfaces, and bionic neural interfaces. Although LUB will readily self-assemble on most substrates, it has become apparent that the substrate has a significant influence on the LUB layer's demonstrated lubrication, antiadhesion, electrokinetic, and size-selective transport properties; however, investigations into LUB-substrate interactions and how they influence the self-assembled LUB layer structure remain a neglected aspect of LUB research. This study utilizes AFM force spectroscopy to directly assess the adhesion energy of LUB molecules adsorbed to a wide variety of different substrates which include inorganic, polymeric, and metallic materials. An analysis of the steric repulsive forces measured on approach provides a qualitative assessment of the LUB layer's mechanical modulus, related to the chain packing density, across substrates. These modulus measurements, combined with characteristic features and the dwell time dependence of the LUB adhesion forces provide insight into the organization and uniformity of the LUB brush structure. The results of these measurements indicate that LUB interactions with different substrates are highly variable and substrate-specific, resulting in a surprisingly broad spectrum of adhesion energies and layer properties (i.e., chain density, uniformity, etc.) which are not, themselves, correlated or easily predicted by substrate properties. In addition, this study finds exceptionally poor LUB adhesion to both mica and poly(methyl methacrylate) surfaces that remain widely used substrates for constructing model surfaces in fundamental tribology studies which may have significant implications for the findings of a number of foundational studies into LUB tribology and molecular synergies.
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Affiliation(s)
- Mingyu Han
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science , Deakin University , Melbourne , Victoria 3216 , Australia
| | - Saimon M Silva
- ARC Centre of Excellence for Electromaterials Science, Faculty of Science, Engineering and Technology , Swinburne University of Technology , Hawthorn , Victoria 3122 , Australia
- BioFab3D@ACMD , St. Vincent's Hospital Melbourne , Fitzroy , Victoria 3065 , Australia
| | - Weiwei Lei
- Institute for Frontier Materials , Deakin University , Geelong , Victoria , Australia
| | - Anita Quigley
- BioFab3D@ACMD , St. Vincent's Hospital Melbourne , Fitzroy , Victoria 3065 , Australia
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute , University of Wollongong , Wollongong , NSW 2522 Australia
| | - Robert M I Kapsa
- BioFab3D@ACMD , St. Vincent's Hospital Melbourne , Fitzroy , Victoria 3065 , Australia
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute , University of Wollongong , Wollongong , NSW 2522 Australia
| | - Simon E Moulton
- ARC Centre of Excellence for Electromaterials Science, Faculty of Science, Engineering and Technology , Swinburne University of Technology , Hawthorn , Victoria 3122 , Australia
| | - George W Greene
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science , Deakin University , Melbourne , Victoria 3216 , Australia
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30
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Cheung S, Subbaraman LN, Ngo W, Jay GD, Schmidt TA, Jones L. Localization of full-length recombinant human proteoglycan-4 in commercial contact lenses using confocal microscopy. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 31:110-122. [PMID: 31594478 DOI: 10.1080/09205063.2019.1678454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The aim of this study was to determine the sorption location of full-length recombinant human proteoglycan 4 (rhPRG4) tagged with fluorescein isothiocyanate (FITC) to four silicone hydrogel contact lenses [balafilcon A (PureVision, Bausch + Lomb), senofilcon A (Acuvue Oasys, Johnson & Johnson), comfilcon A (Biofinity, CooperVision), lotrafilcon B (Air Optix, Alcon)] and one conventional hydrogel lens [etafilcon A (Acuvue 2, Johnson & Johnson)], using confocal laser scanning microscopy (CLSM). Lenses (n = 3 each) were incubated under two conditions: (1) FITC-rhPRG4 solution at 300 μg/mL and (2) phosphate-buffered saline, for 1 h at 37 °C in darkness with gentle shaking. The central 4 mm of each lens was removed and viewed with the Zeiss 510 CLSM using an argon laser at 488 nm (FITC excitation 495 nm, emission 521 nm). Depth scans were taken at 1 μm intervals to a maximum depth of 100 μm. All lens materials demonstrated sorption of rhPRG4. Both senofilcon A and balafilcon A revealed FITC-rhPRG4 penetration into the bulk of the lens, generally favoring the surface. rhPRG4 was observed exclusively on the surface of lotrafilcon B, with no presence within the bulk of the lens. rhPRG4 was evenly distributed throughout the bulk of the lens, as well as on the surface, for comfilcon A and etafilcon A. The sorption profile of FITC-rhPRG4 was successfully visualized using CLSM in various contact lens materials. The polymer composition, surface treatment and pore size of the material can influence the sorption of rhPRG4.
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Affiliation(s)
- Steven Cheung
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada
| | - Lakshman N Subbaraman
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada
| | - William Ngo
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada
| | - Gregory D Jay
- Department of Emergency Medicine, Alpert Medical School & School of Engineering, Brown University, Providence, Rhode Island, USA
| | - Tannin A Schmidt
- Faculty of Kinesiology & Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada.,Biomedical Engineering Department, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Lyndon Jones
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada
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31
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Multiscale reverse engineering of the human ocular surface. Nat Med 2019; 25:1310-1318. [PMID: 31384041 DOI: 10.1038/s41591-019-0531-2] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 06/21/2019] [Indexed: 02/07/2023]
Abstract
Here we present a miniaturized analog of a blinking human eye to reverse engineer the complexity of the interface between the ocular system and the external environment. Our model comprises human cells and provides unique capabilities to replicate multiscale structural organization, biological phenotypes and dynamically regulated environmental homeostasis of the human ocular surface. Using this biomimetic system, we discovered new biological effects of blink-induced mechanical forces. Furthermore, we developed a specialized in vitro model of evaporative dry-eye disease for high-content drug screening. This work advances our ability to emulate how human physiological systems interface with the external world, and may contribute to the future development of novel screening platforms for biopharmaceutical and environmental applications.
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Sarkar A, Chanda A, Regmi SC, Karve K, Deng L, Jay GD, Jirik FR, Schmidt TA, Bonni S. Recombinant human PRG4 (rhPRG4) suppresses breast cancer cell invasion by inhibiting TGFβ-Hyaluronan-CD44 signalling pathway. PLoS One 2019; 14:e0219697. [PMID: 31361756 PMCID: PMC6667139 DOI: 10.1371/journal.pone.0219697] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 06/28/2019] [Indexed: 01/02/2023] Open
Abstract
Metastasis is the major cause of cancer-related morbidity and mortality. The ability of cancer cells to become invasive and migratory contribute significantly to metastatic growth, which necessitates the identification of novel anti-migratory and anti-invasive therapeutic approaches. Proteoglycan 4 (PRG4), a mucin-like glycoprotein, contributes to joint synovial homeostasis through its friction-reducing and anti-adhesive properties. Adhesion to surrounding extracellular matrix (ECM) components is critical for cancer cells to invade the ECM and eventually become metastatic, raising the question whether PRG4 has an anti-invasive effect on cancer cells. Here, we report that a full-length recombinant human PRG4 (rhPRG4) suppresses the ability of the secreted protein transforming growth factor beta (TGFβ) to induce phenotypic disruption of three-dimensional human breast cancer cell-derived organoids by reducing ligand-induced cell invasion. In mechanistic studies, we find that rhPRG4 suppresses TGFβ-induced invasiveness of cancer cells by inhibiting the downstream hyaluronan (HA)-cell surface cluster of differentiation 44 (CD44) signalling axis. Furthermore, we find that rhPRG4 represses TGFβ-dependent increase in the protein abundance of CD44 and of the enzyme HAS2, which is involved in HA biosynthesis. It is widely accepted that TGFβ has both tumor suppressing and tumor promoting roles in cancer. The novel finding that rhPRG4 opposes HAS2 and CD44 induction by TGFβ has implications for downregulating the tumor promoting roles, while maintaining the tumor suppressive aspects of TGFβ actions. Finally, these findings point to rhPRG4's potential clinical utility as a therapeutic treatment for invasive and metastatic breast cancer.
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Affiliation(s)
- Anusi Sarkar
- The Arnie Charbonneau Cancer Institute and Department of Biochemistry & Molecular Biology, The Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Ayan Chanda
- The Arnie Charbonneau Cancer Institute and Department of Biochemistry & Molecular Biology, The Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Suresh C. Regmi
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Kunal Karve
- The Arnie Charbonneau Cancer Institute and Department of Biochemistry & Molecular Biology, The Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Lili Deng
- The Arnie Charbonneau Cancer Institute and Department of Biochemistry & Molecular Biology, The Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Gregory D. Jay
- Department of Emergency Medicine—Alpert Medical School & School of Engineering, Brown University, Providence, Rhode Island, United States of America
| | - Frank R. Jirik
- The Arnie Charbonneau Cancer Institute and Department of Biochemistry & Molecular Biology, The Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Tannin A. Schmidt
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, Connecticut, United States of America
- * E-mail: (SB); (TS)
| | - Shirin Bonni
- The Arnie Charbonneau Cancer Institute and Department of Biochemistry & Molecular Biology, The Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- * E-mail: (SB); (TS)
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33
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Flowers SA, Lane CS, Karlsson NG. Deciphering Isomers with a Multiple Reaction Monitoring Method for the Complete Detectable O-Glycan Repertoire of the Candidate Therapeutic, Lubricin. Anal Chem 2019; 91:9819-9827. [PMID: 31246420 DOI: 10.1021/acs.analchem.9b01485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Glycosylation is a fundamental post-translational modification, occurring on half of all proteins. Despite its significance, our understanding is limited, in part due to the inherent difficulty in studying these branched, multi-isomer structures. Accessible, detailed, and quantifiable methods for studying glycans, particularly O-glycans, are needed. Here we take a multiple reaction monitoring (MRM) approach to differentiate and relatively quantify all detectable glycans, including isomers, on the heavily O-glycosylated protein lubricin. Lubricin (proteoglycan 4) is essential for lubrication of the joint and eye. Given the therapeutic potential of lubricin, it is essential to understand its O-glycan repertoire in biological and recombinantly produced samples. O-Glycans were released by reductive β-elimination and defined, showing a range of 26 neutral, sulfated, sialylated, and both sulfated and sialylated core 1 (Galβ1-3GalNAcα1-) and core 2 (Galβ1-3(GlcNAcβ1-6)GalNAcα1-) structures. Isomer-specific MRM transitions allowed effective differentiation of neutral glycan isomers as well as sulfated isomeric structures, where the sulfate was retained on the fragment ions. This strategy was not as effective with labile sialylated structures; instead, it was observed that the optimal collision energy for the m/z 290.1 sialic acid B-fragment differed consistently between sialic acid isomers, allowing differentiation between isomers when fragmentation spectra were insufficient. This approach was also effective for purchased Neu5Acα2-3Galβ1-4Glc and Neu5Acα2-6Galβ1-4Glc and for Neu5Acα2-3Galβ1-4GlcNAc and Neu5Acα2-6Galβ1-4GlcNAc linkage isomers with the Neu5Acα2-6 consistently requiring more energy for optimal generation of the m/z 290.1 fragment. Overall, this method provides an effective and easily accessible approach for the quantification and annotation of complex released O-glycan samples.
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Affiliation(s)
- Sarah A Flowers
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy , University of Gothenburg , Medicinaregatan 9A , 40530 Gothenburg , Sweden.,Department of Neuroscience , Georgetown University , 3970 Reservoir Road NW, New Research Building EP20 , Washington, D.C. , United States
| | - Catherine S Lane
- SCIEX , Phoenix House, Lakeside Drive, Centre Park , Warrington WA1 1RX , United Kingdom
| | - Niclas G Karlsson
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy , University of Gothenburg , Medicinaregatan 9A , 40530 Gothenburg , Sweden
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34
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Shurer CR, Wang Y, Feeney E, Head SE, Zhang VX, Su J, Cheng Z, Stark MA, Bonassar LJ, Reesink HL, Paszek MJ. Stable recombinant production of codon-scrambled lubricin and mucin in human cells. Biotechnol Bioeng 2019; 116:1292-1303. [PMID: 30684357 PMCID: PMC6764099 DOI: 10.1002/bit.26940] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 01/03/2019] [Accepted: 01/24/2019] [Indexed: 12/23/2022]
Abstract
Widespread therapeutic and commercial interest in recombinant mucin technology has emerged due to the unique ability of mucin glycoproteins to hydrate, protect, and lubricate biological surfaces. However, recombinant production of the large, highly repetitive domains that are characteristic of mucins remains a challenge in biomanufacturing likely due, at least in part, to the inherent instability of DNA repeats in the cellular genome. To overcome this challenge, we exploit codon redundancy to encode desired mucin polypeptides with minimal nucleotide repetition. The codon-scrambling strategy was applied to generate synonymous genes, or "synDNAs," for two mucins of commercial interest: lubricin and mucin 1. Stable, long-term recombinant production in suspension-adapted human 293-F cells was demonstrated for the synonymous lubricin complementary DNA (cDNA), which we refer to as SynLubricin. Under optimal conditions, a 293-F subpopulation produced recombinant SynLubricin at more than 200 mg/L of media and was stable throughout 2 months of continuous culture. Functionality tests confirmed that the recombinant lubricin could effectively inhibit cell adhesion and lubricate cartilage explants. Together, our work provides a viable workflow for cDNA design and stable mucin production in mammalian host production systems.
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Affiliation(s)
- Carolyn R. Shurer
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York
| | - Yuyan Wang
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Elizabeth Feeney
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
| | - Shelby E. Head
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York
| | - Victoria X. Zhang
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York
| | - Jin Su
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Zhu Cheng
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York
| | - Morgan A. Stark
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | | | - Heidi L. Reesink
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Matthew J. Paszek
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
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35
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Yang X, Zhao G, Yan J, Xu R, Che C, Zheng H, Zhu G, Zhang J. Pannexin 1 Channels Contribute to IL-1β Expression via NLRP3/Caspase-1 Inflammasome in Aspergillus Fumigatus Keratitis. Curr Eye Res 2019; 44:716-725. [PMID: 30793631 DOI: 10.1080/02713683.2019.1584321] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Purpose: Pannexin 1 channels are deemed to play important roles in inflammation. However, there is limited information regarding their roles in fungal infection diseases, especially fungal keratitis. This study aimed to investigate the role of pannexin 1 channels in Aspergillus fumigatus (A. fumigatus) keratitis. Materials and Methods: Mouse models or immortalized human corneal epithelial cells (HCECs) were infected with or without A. fumigatus for given time. The expression of pannexin 1 channels was tested by qPCR, western blot and immunofluorescence staining. Mice of A. fumigatus keratitis were pretreated with carbenoxolone (CBX) or 2'(3')-O-(4-Benzoylbenzoyl) adenosine-5'-triphosphate (BzATP) to block or activate the opening of pannexin 1 channels respectively. The clinical score was recorded. Cornea tissues were examined for the downstream signals of pannexin 1 channels, including NLRP3, Caspase-1 and IL-1β, and myeloperoxidase (MPO) by PCR and ELISA. Data were analyzed with commercial data analysis software and a P < 0.05 was considered to be statistically significant. Results: Upon A. fumigatus infection, pannexin 1 expression increased at both the mRNA and the protein levels in mice corneas (P< 0.05, n = 3). Immunofluorescence indicated that pannexin 1 channels were mainly located in the corneal epithelial layer, and they were upregulated after A. fumigatus infection. In vitro, the same tendency was found at the mRNA and the protein levels in HCECs (P< 0.05, n = 8). In mouse model, blockage of pannexin 1 channels by CBX caused more severely keratitis. The downstream signals of pannexin 1 channels (NLRP3/Caspase-1/IL-1β) and MPO were down-regulated. Whereas activation the opening of pannexin 1 channels by BzATP reduced corneal infection with increased expression of Caspase-1 and IL-1β. Conclusions: Pannexin 1 channels play important roles in the regulation of progression and leucocytes aggregation during corneal A. fumigatus infection via the NLRP3/Caspase-1/IL-β pathway.
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Affiliation(s)
- Xuejiao Yang
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Guiqiu Zhao
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Junwei Yan
- b Department of Vascular Surgery , Huangdao Branch of the Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Rui Xu
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Chengye Che
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Hengrui Zheng
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Guoqiang Zhu
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Jie Zhang
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
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36
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Huang J, Qiu X, Xie L, Jay GD, Schmidt TA, Zeng H. Probing the Molecular Interactions and Lubrication Mechanisms of Purified Full-Length Recombinant Human Proteoglycan 4 (rhPRG4) and Hyaluronic Acid (HA). Biomacromolecules 2019; 20:1056-1067. [PMID: 30608145 DOI: 10.1021/acs.biomac.8b01678] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Probing the adsorption and lubrication behavior of lubricin, also known as proteoglycan 4 (PRG4), is important for understanding the ultralow friction of cartilage lubrication. Most previous research has focused on native lubricin either purified from synovial fluid or articular cartilage explant culture media. In this work, the adsorption behavior and lubrication mechanism of full-length recombinant human PRG4 (rhPRG4) on mica as well as the effect of adding hyaluronic acid (HA, a polysaccharide) were systematically investigated using a surface forces apparatus (SFA) technique. A low friction coefficient (μ ∼ 0.04) was measured when multilayer rhPRG4 (∼31 nm) was confined in between mica surfaces, even when the load increased to ∼1.2 MPa. Intriguingly, a previously unreported ultralow friction coefficient (μ < 0.005) was observed at a low sliding velocity ( v = 0.14 μm/s) with the applied load P reaching ∼3.6 MPa when a diluted rhPRG4 solution (∼90 μg/mL) was used. The distinct friction behavior is likely due to the smooth and more close-packed lubricin coating, as made evident by the atomic force microscope imaging. Adding HA onto multilayer rhPRG4-coated mica increased the friction coefficient μ to ∼0.1; however, the load bearing property increased, indicating potential synergistic effect between rhPRG4 and HA, which was further demonstrated by the weak adhesion observed when separating rhPRG4-coated mica and HA-coated aminopropyltriethoxysilane-mica (APTES-mica). Alternatively, adding premixed rhPRG4-HA on mica had a friction coefficient (μ ∼ 0.1) close to that of injecting concentrated rhPRG4 (∼450 μg/mL) with lower load sustainability. Our results provide fundamental insights into the adsorption and lubrication behavior of lubricin and its interaction with HA, with useful implications for the underlying mechanism of ultralow friction provided by synovial fluid.
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Affiliation(s)
- Jun Huang
- Center for Advanced Jet Engineering Technologies (CaJET), Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Ministry of Education), Department of Mechanical Engineering , Shandong University , Jingshi Road 17923 , Jinan 250061 , China.,Department of Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Xiaoyong Qiu
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Lei Xie
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Gregory D Jay
- Department of Emergency Medicine , Warren Alpert Medical School of Brown University , Providence , Rhode Island 02903 , United States.,Department of Engineering , Brown University , Providence , Rhode Island 02903 , United States
| | - Tannin A Schmidt
- Biomedical Engineering Department, School of Dental Medicine , University of Connecticut Health Center , 263 Farmington Avenue , Farmington , Connecticut 06030 , United States
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
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37
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Das N, Schmidt TA, Krawetz RJ, Dufour A. Proteoglycan 4: From Mere Lubricant to Regulator of Tissue Homeostasis and Inflammation. Bioessays 2018; 41:e1800166. [DOI: 10.1002/bies.201800166] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/19/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Nabangshu Das
- Faculty of Kinesiology; University of Calgary; Calgary Alberta T2N4N1 Canada
| | - Tannin A. Schmidt
- Biomedical Engineering Department; School of Dental Medicine; University of Connecticut Health Center; Farmington CT 06030 USA
| | - Roman J. Krawetz
- Cell Biology and Anatomy; Cumming School of Medicine; University of Calgary; 3330 Hospital Drive NW Calgary Alberta T2N4N1 Canada
- McCaig institute for Bone and Joint Health; University of Calgary; Calgary Alberta T2N4N1 Canada
| | - Antoine Dufour
- McCaig institute for Bone and Joint Health; University of Calgary; Calgary Alberta T2N4N1 Canada
- Physiology & Pharmacology; Cumming School of Medicine; University of Calgary; Calgary Alberta T2N4N1 Canada
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Faivre J, Montembault A, Sudre G, Shrestha BR, Xie G, Matyjaszewski K, Benayoun S, Banquy X, Delair T, David L. Lubrication and Wear Protection of Micro-Structured Hydrogels Using Bioinspired Fluids. Biomacromolecules 2018; 20:326-335. [DOI: 10.1021/acs.biomac.8b01311] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jimmy Faivre
- Ingénierie des Matériaux Polymères, IMP- CNRS UMR 5223, Université de Lyon, Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
- Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal, Montréal, Qc H3T 1J4, Canada
| | - Alexandra Montembault
- Ingénierie des Matériaux Polymères, IMP- CNRS UMR 5223, Université de Lyon, Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
| | - Guillaume Sudre
- Ingénierie des Matériaux Polymères, IMP- CNRS UMR 5223, Université de Lyon, Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
| | - Buddha Ratna Shrestha
- Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal, Montréal, Qc H3T 1J4, Canada
| | - Guojun Xie
- Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Stéphane Benayoun
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, 69134 Ecully Cedex, France
| | - Xavier Banquy
- Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal, Montréal, Qc H3T 1J4, Canada
| | - Thierry Delair
- Ingénierie des Matériaux Polymères, IMP- CNRS UMR 5223, Université de Lyon, Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
| | - Laurent David
- Ingénierie des Matériaux Polymères, IMP- CNRS UMR 5223, Université de Lyon, Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
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Park DS, Regmi SC, Svystonyuk DA, Teng G, Belke D, Turnbull J, Guzzardi DG, Kang S, Cowman MK, Schmidt TA, Fedak PW. Human pericardial proteoglycan 4 (lubricin): Implications for postcardiotomy intrathoracic adhesion formation. J Thorac Cardiovasc Surg 2018; 156:1598-1608.e1. [DOI: 10.1016/j.jtcvs.2018.03.170] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 03/30/2018] [Accepted: 03/30/2018] [Indexed: 12/14/2022]
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Korogiannaki M, Samsom M, Schmidt TA, Sheardown H. Surface-Functionalized Model Contact Lenses with a Bioinspired Proteoglycan 4 (PRG4)-Grafted Layer. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30125-30136. [PMID: 30114356 DOI: 10.1021/acsami.8b09755] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Ocular dryness and discomfort are the primary reasons for the discontinuation of contact lens wear. This is mainly due to poorly hydrated contact lens surfaces and increased friction, particularly at the end of the day and can potentially cause reduced vision or even inflammation. Proteoglycan 4 (PRG4) is a mucinous glycoprotein with boundary lubricating properties, naturally found in the eye, able to prevent tear film evaporation and protect the ocular surface during blinking. Aiming to improve the interfacial interactions between the ocular surface and the contact lens, the synthesis and characterization of surface-modified model contact lenses with PRG4 is described. Full-length recombinant human PRG4 (rhPRG4) was successfully grafted onto the surface of model conventional and silicone hydrogel (SiHy) contact lenses via its somatomedin B-like end-domain using N, N'-carbonyldiimidazole linking chemistry. Grafting was assessed by Fourier transform infrared spectroscopy-attenuated total reflectance, X-ray photoelectron spectroscopy, and radioactive (I131) labeling. Surface immobilization of rhPRG4 led to model conventional and SiHy materials with improved antifouling properties, without impacting optical transparency or causing any toxic effects to human corneal epithelial cells in vitro. The surface wettability and the boundary friction against human corneal tissue were found to be substrate-dependent, with only the rhPRG4-grafted model SiHy exhibiting a reduced contact angle and kinetic friction coefficient compared to the unmodified surfaces. Hence, clinical grade rhPRG4 can be an attractive candidate for the development of novel bioinspired SiHy contact lenses, providing improved comfort and overall lens performance.
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Affiliation(s)
- Myrto Korogiannaki
- Department of Chemical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
| | - Michael Samsom
- Biomedical Engineering Graduate Program , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Tannin A Schmidt
- Biomedical Engineering Graduate Program , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Heather Sheardown
- Department of Chemical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
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41
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Qadri M, Jay GD, Zhang LX, Wong W, Reginato AM, Sun C, Schmidt TA, Elsaid KA. Recombinant human proteoglycan-4 reduces phagocytosis of urate crystals and downstream nuclear factor kappa B and inflammasome activation and production of cytokines and chemokines in human and murine macrophages. Arthritis Res Ther 2018; 20:192. [PMID: 30157934 PMCID: PMC6116363 DOI: 10.1186/s13075-018-1693-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 08/01/2018] [Indexed: 01/29/2023] Open
Abstract
Background Gout is an inflammatory arthritis caused by monosodium urate monohydrate (MSU) crystals’ joint deposition. MSU phagocytosis by resident macrophages is a key step in gout pathogenesis. MSU phagocytosis triggers nuclear factor kappa B (NFκB) activation and production of cytokines and chemokines. Proteoglycan-4 (PRG4) is a glycoprotein produced by synovial fibroblasts and exerts an anti-inflammatory effect in the joint mediated by its interaction with cell surface receptor CD44. PRG4 also binds and antagonizes TLR2 and TLR4. The objective of this study is to evaluate the efficacy of recombinant human PRG4 (rhPRG4) in suppressing MSU-induced inflammation and mechanical allodynia in vitro and in vivo. Methods THP-1 macrophages were incubated with MSU crystals ± rhPRG4 or bovine submaxillary mucin (BSM), and crystal phagocytosis, cytokines and chemokines expression and production were determined. NFκB p65 subunit nuclear translocation, NLRP3 induction, caspase-1 activation and conversion of proIL-1β to mature IL-1β were studied. MSU phagocytosis by Prg4+/+ and Prg4−/− peritoneal macrophages was determined in the absence or presence of rhPRG4, BSM, anti-CD44, anti-TLR2, anti-TLR4 and isotype control antibodies. Rhodamine-labeled rhPRG4 was incubated with murine macrophages and receptor colocalization studies were performed. Lewis rats underwent intra-articular injection of MSU crystals followed by intra-articular treatment with PBS or rhPRG4. Weight bearing and SF myeloperoxidase activities were determined. Results rhPRG4 reduced MSU crystal phagocytosis at 4 h (p < 0.01) and IL-1β, TNF-α, IL-8 and MCP-1 expression and production at 6 h (p < 0.05). BSM did not alter MSU phagocytosis or IL-1β production in human and murine macrophages. rhPRG4 treatment reduced NFκB nuclear translocation, NLRP3 expression, caspase-1 activation and generation of mature IL-1β (p < 0.05). MSU-stimulated IL-1β production was higher in Prg4−/− macrophages compared to Prg4+/+ macrophages (p < 0.001). rhPRG4, anti-CD44, anti-TLR2 and anti-TLR4 antibody treatments reduced MSU phagocytosis and IL-1β production in murine macrophages (p < 0.05). rhPRG4 preferentially colocalized with CD44 on Prg4−/− peritoneal macrophages compared to TLR2 or TLR4 (p < 0.01). rhPRG4 normalized weight bearing and reduced SF myeloperoxidase activity compared to PBS in vivo. Conclusion rhPRG4 inhibits MSU crystal phagocytosis and exhibits an anti-inflammatory and anti-nociceptive activity in vitro and in vivo. rhPRG4’s anti-inflammatory mechanism may be due to targeting CD44 on macrophages.
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Affiliation(s)
- Marwa Qadri
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Rinker Health Sciences Campus, 9401 Jeronimo Road, Irvine, CA, 92618, USA
| | - Gregory D Jay
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, USA.,Department of Biomedical Engineering, Brown University, Providence, RI, USA
| | - Ling X Zhang
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, USA
| | - Wendy Wong
- Department of Emergency Medicine, Rhode Island Hospital, Providence, RI, USA
| | - Anthony M Reginato
- Division of Rheumatology and Department of Dermatology, Rhode Island Hospital, Providence, RI, USA
| | - Changqi Sun
- Division of Rheumatology and Department of Dermatology, Rhode Island Hospital, Providence, RI, USA
| | - Tannin A Schmidt
- Biomedical Engineering Department, School of Dental Medicine, University of Connecticut Health Center, Farmington, CT, USA
| | - Khaled A Elsaid
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Rinker Health Sciences Campus, 9401 Jeronimo Road, Irvine, CA, 92618, USA.
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Winkeljann B, Bussmann AB, Bauer MG, Lieleg O. Oscillatory Tribology Performed With a Commercial Shear Rheometer. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.biotri.2018.04.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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43
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Advances in Tribology of Lubricin and Lubricin-Like Synthetic Polymer Nanostructures. LUBRICANTS 2018. [DOI: 10.3390/lubricants6020030] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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44
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Eroglu A, Schulze KJ, Yager J, Cole RN, Christian P, Nonyane BAS, Lee SE, Wu LSF, Khatry S, Groopman J, West KP. Plasma proteins associated with circulating carotenoids in Nepalese school-aged children. Arch Biochem Biophys 2018; 646:153-160. [PMID: 29605494 PMCID: PMC5937903 DOI: 10.1016/j.abb.2018.03.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/05/2018] [Accepted: 03/21/2018] [Indexed: 12/24/2022]
Abstract
Carotenoids are naturally occurring pigments that function as vitamin A precursors, antioxidants, anti-inflammatory agents or biomarkers of recent vegetable and fruit intake, and are thus important for population health and nutritional assessment. An assay approach that measures proteins could be more technologically feasible than chromatography, thus enabling more frequent carotenoid status assessment. We explored associations between proteomic biomarkers and concentrations of 6 common dietary carotenoids (α-carotene, β-carotene, lutein/zeaxanthin, β-cryptoxanthin, and lycopene) in plasma from 500 6-8 year old Nepalese children. Samples were depleted of 6 high-abundance proteins. Plasma proteins were quantified using tandem mass spectrometry and expressed as relative abundance. Linear mixed effects models were used to determine the carotenoid:protein associations, accepting a false discovery rate of q < 0.10. We quantified 982 plasma proteins in >10% of all child samples. Among these, relative abundance of 4 were associated with β-carotene, 11 with lutein/zeaxanthin and 51 with β-cryptoxanthin. Carotenoid-associated proteins are notably involved in lipid and vitamin A transport, antioxidant function and anti-inflammatory processes. No protein biomarkers met criteria for association with α-carotene or lycopene. Plasma proteomics may offer an approach to assess functional biomarkers of carotenoid status, intake and biological function for public health application. Original maternal micronutrient trial from which data were derived as a follow-up activity was registered at ClinicalTrials.gov: NCT00115271.
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Affiliation(s)
- Abdulkerim Eroglu
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA.
| | - Kerry J Schulze
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA
| | - James Yager
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Environmental Health and Engineering, Baltimore, MD, USA
| | - Robert N Cole
- Johns Hopkins School of Medicine, Mass Spectrometry and Proteomics Facility, Baltimore, MD, USA; Department of Biological Chemistry, Baltimore, MD, USA
| | - Parul Christian
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA
| | - Bareng A S Nonyane
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA
| | - Sun Eun Lee
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA
| | - Lee S F Wu
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA
| | - Subarna Khatry
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA
| | - John Groopman
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Environmental Health and Engineering, Baltimore, MD, USA
| | - Keith P West
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Center for Human Nutrition, Department of International Health, Baltimore, MD, USA
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45
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Greenwood-Van Meerveld B, Mohammadi E, Latorre R, Truitt ER, Jay GD, Sullivan BD, Schmidt TA, Smith N, Saunders D, Ziegler J, Lerner M, Hurst R, Towner RA. Preclinical Animal Studies of Intravesical Recombinant Human Proteoglycan 4 as a Novel Potential Therapy for Diseases Resulting From Increased Bladder Permeability. Urology 2018; 116:230.e1-230.e7. [PMID: 29545038 DOI: 10.1016/j.urology.2018.02.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 02/23/2018] [Accepted: 02/24/2018] [Indexed: 12/30/2022]
Abstract
OBJECTIVE To test in an animal model the hypothesis that recombinant human proteoglycan 4 (rhPRG4; lubricin), a highly O-glycosylated mucin-like glycoprotein, may be a novel surface-active therapeutic for treating bladder permeability with comorbid bowel permeability. Previously we showed that inducing bladder permeability in rats with dilute protamine sulfate (PS) produced colonic permeability and visceral hypersensitivity, suggesting increased bladder permeability could represent an etiologic factor in both interstitial cystitis-bladder pain syndrome and irritable bowel syndrome. METHODS We used an animal model of catheterized ovariectomized female rats instilled intravesically with 1 mg/mL PS for 10 minutes that after 24 hours were treated with 1.2 mg/mL lubricin or with vehicle alone. After 24 hours the bladder and colon were removed and permeability assessed electrophysiologically with the Ussing chamber to measure the transepithelial electrical resistance. A second set of rats was treated identically, except permeability was assessed on day 3 and on day 5 using contrast-enhanced magnetic resonance imaging with gadolinium diethylenetriamine penta-acetic acid instilled into the bladder. RESULTS Intravesical lubricin reversed bladder permeability induced by PS and prevented the concomitant increase in permeability induced in the bowel (organ crosstalk). The protective effect was confirmed with magnetic resonance imaging, and because individual rats could be followed over time, the impermeability of the bladder restored by rhPRG4 remained for 5 days. CONCLUSION These data indicate that instillation of rhPRG4 into a permeable bladder can restore its normally impermeable state, and that the effect lasts for 5 days and also prevents bowel symptoms often comorbid with interstitial cystitis-bladder pain syndrome.
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Affiliation(s)
- Beverley Greenwood-Van Meerveld
- Oklahoma Center for Neuroscience, Oklahoma University Health Sciences Center, Oklahoma City, OK; Department of Physiology, Oklahoma University Health Sciences Center, Oklahoma City, OK; Veterans Administration, Oklahoma City, OK
| | - Ehsan Mohammadi
- Department of Physiology, Oklahoma University Health Sciences Center, Oklahoma City, OK
| | - Rocco Latorre
- Oklahoma Center for Neuroscience, Oklahoma University Health Sciences Center, Oklahoma City, OK; Department of Physiology, Oklahoma University Health Sciences Center, Oklahoma City, OK
| | | | - Gregory D Jay
- Department of Emergency Medicine, Brown University, Providence, RI
| | | | - Tannin A Schmidt
- Biomedical Engineering Department, School of Dental Medicine, University of Connecticut, Farmington, CT
| | - Nataliya Smith
- Advanced Magnetic Resonance Center, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Debra Saunders
- Advanced Magnetic Resonance Center, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Jadith Ziegler
- Advanced Magnetic Resonance Center, Oklahoma Medical Research Foundation, Oklahoma City, OK; Department of Biochemistry and Molecular Biology, Oklahoma University Health Sciences Center, Oklahoma City, OK
| | - Megan Lerner
- Department of Surgery, Oklahoma University Health Sciences Center, Oklahoma City, OK
| | - Robert Hurst
- Oklahoma Center for Neuroscience, Oklahoma University Health Sciences Center, Oklahoma City, OK; Department of Biochemistry and Molecular Biology, Oklahoma University Health Sciences Center, Oklahoma City, OK; Department of Urology, Oklahoma University Health Sciences Center, Oklahoma City, OK.
| | - Rheal A Towner
- Oklahoma Center for Neuroscience, Oklahoma University Health Sciences Center, Oklahoma City, OK; Department of Physiology, Oklahoma University Health Sciences Center, Oklahoma City, OK; Advanced Magnetic Resonance Center, Oklahoma Medical Research Foundation, Oklahoma City, OK; Department of Pathology, Oklahoma University Health Sciences Center, Oklahoma City, OK
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Yu-Wai-Man C, Tagalakis AD, Meng J, Bouremel Y, Lee RMH, Virasami A, Hart SL, Khaw PT. Genotype-Phenotype Associations of IL6 and PRG4 With Conjunctival Fibrosis After Glaucoma Surgery. JAMA Ophthalmol 2017; 135:1147-1155. [PMID: 28975281 DOI: 10.1001/jamaophthalmol.2017.3407] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Importance Postsurgical fibrosis is a critical determinant of the long-term success of glaucoma surgery, but no reliable biomarkers are currently available to stratify the risk of scarring. Objective To compare the clinical phenotype of patients with conjunctival fibrosis after glaucoma surgery with candidate gene expression tissue biomarkers of fibrosis. Design, Setting, and Participants In this cross-sectional study, 42 patients were recruited at the time of glaucoma surgery at the Moorfields Eye Hospital from September 1, 2014, to September 1, 2016. The participants were divided into those with fibrosis and those without fibrosis. Main Outcomes and Measures Genotype-phenotype correlations of the IL6 or PRG4 gene and detailed clinical phenotype. The IL6 and PRG4 protein expression in conjunctival tissues was also assessed using in situ immunohistochemical analysis. Central bleb area, maximal bleb area, and bleb height were graded on a scale of 1 to 5 (1 indicating 0%; 2, 25%; 3, 50%; 4, 75%; and 5, 100%). Bleb vascularity was graded on a scale of 1 to 5 (1 indicating avascularity; 2, normal; 3, mild; 4, moderate; and 5, severe hyperemia). Results A total of 42 patients were recruited during the study period; 28 participants (67%) had previously undergone glaucoma surgery (fibrotic group) (mean [SD] age, 43.8 [3.6 years]; 16 [57%] female; 22 [79%] white), and 14 participants (33%) had not previously undergone glaucoma surgery (nonfibrotic group) (mean [SD] age, 47.7 [6.9] years; 4 [29%] female; 9 [64%] white). The fibrotic group had marked bleb scarring and vascularization and worse logMAR visual acuity. The mean (SD) grades were 1.4 (0.1) for central bleb area, 1.4 (0.1) for bleb height, and 3.4 (0.2) for bleb vascularity. The IL6 gene was upregulated in fibrotic cell lines (mean, 0.040) compared with nonfibrotic cell lines (mean, 0.011) (difference, 0.029; 95% CI, 0.015-0.043; P = .003). The PRG4 gene was also downregulated in fibrotic cell lines (0.002) compared with nonfibrotic cell lines (mean, 0.109; difference, 0.107; 95% CI, 0.104-0.110; P = .03). The study found a strong correlation between the IL6 gene and the number of glaucoma operations (r = 0.94, P < .001) and logMAR visual acuity (r = 0.64, P = .03). A moderate correlation was found between the PRG4 gene and the number of glaucoma operations (r = -0.72, P = .005) and logMAR visual acuity (r = -0.62, P = .03). Conclusions and Relevance IL6 and PRG4 represent potential novel tissue biomarkers of disease severity and prognosis in conjunctival fibrosis after glaucoma surgery. Future longitudinal studies with multiple postoperative measures are needed to validate the effect of these potential biomarkers of fibrosis.
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Affiliation(s)
- Cynthia Yu-Wai-Man
- National Institute for Health Research Biomedical Research Centre at Moorfields Eye Hospital National Health Service Foundation Trust and University College London Institute of Ophthalmology, London, England
| | - Aristides D Tagalakis
- Experimental and Personalised Medicine Section, University College London Great Ormond Street Institute of Child Health, London, England
| | - Jinhong Meng
- Experimental and Personalised Medicine Section, University College London Great Ormond Street Institute of Child Health, London, England
| | - Yann Bouremel
- National Institute for Health Research Biomedical Research Centre at Moorfields Eye Hospital National Health Service Foundation Trust and University College London Institute of Ophthalmology, London, England.,Department of Mechanical Engineering, University College London, London, England
| | - Richard M H Lee
- National Institute for Health Research Biomedical Research Centre at Moorfields Eye Hospital National Health Service Foundation Trust and University College London Institute of Ophthalmology, London, England
| | - Alex Virasami
- Department of Histopathology, Great Ormond Street Hospital for Children National Health Service Foundation Trust, London, England
| | - Stephen L Hart
- Experimental and Personalised Medicine Section, University College London Great Ormond Street Institute of Child Health, London, England
| | - Peng T Khaw
- National Institute for Health Research Biomedical Research Centre at Moorfields Eye Hospital National Health Service Foundation Trust and University College London Institute of Ophthalmology, London, England
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Jeyalatha MV, Qu Y, Liu Z, Ou S, He X, Bu J, Li S, Reinach PS, Liu Z, Li W. Function of meibomian gland: Contribution of proteins. Exp Eye Res 2017; 163:29-36. [DOI: 10.1016/j.exer.2017.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 05/04/2017] [Accepted: 06/12/2017] [Indexed: 10/18/2022]
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Samsom M, Korogiannaki M, Subbaraman LN, Sheardown H, Schmidt TA. Hyaluronan incorporation into model contact lens hydrogels as a built-in lubricant: Effect of hydrogel composition and proteoglycan 4 as a lubricant in solution. J Biomed Mater Res B Appl Biomater 2017; 106:1818-1826. [DOI: 10.1002/jbm.b.33989] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 08/11/2017] [Accepted: 08/28/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Michael Samsom
- Biomedical Engineering Graduate Program; University of Calgary; Calgary Alberta Canada
| | - Myrto Korogiannaki
- Faculty of Chemical Engineering; McMaster University; Hamilton Ontario Canada
| | - Lakshman N. Subbaraman
- Centre for Contact Lens Research, School of Optometry & Vision Science; University of Waterloo; Waterloo Ontario Canada
| | - Heather Sheardown
- Faculty of Chemical Engineering; McMaster University; Hamilton Ontario Canada
| | - Tannin A. Schmidt
- Biomedical Engineering Graduate Program; University of Calgary; Calgary Alberta Canada
- Faculty of Kinesiology; University of Calgary; Calgary Alberta Canada
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Nebbioso M, Del Regno P, Gharbiya M, Sacchetti M, Plateroti R, Lambiase A. Analysis of the Pathogenic Factors and Management of Dry Eye in Ocular Surface Disorders. Int J Mol Sci 2017; 18:E1764. [PMID: 28805710 PMCID: PMC5578153 DOI: 10.3390/ijms18081764] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 07/30/2017] [Accepted: 08/09/2017] [Indexed: 12/17/2022] Open
Abstract
The tear film represents the interface between the eye and the environment. The alteration of the delicate balance that regulates the secretion and distribution of the tear film determines the dry eye (DE) syndrome. Despite having a multifactorial origin, the main risk factors are female gender and advanced age. Likewise, morphological changes in several glands and in the chemical composition of their secretions, such as proteins, mucins, lipidics, aqueous tears, and salinity, are highly relevant factors that maintain a steady ocular surface. Another key factor of recurrence and onset of the disease is the presence of local and/or systemic inflammation that involves the ocular surface. DE syndrome is one of the most commonly encountered diseases in clinical practice, and many other causes related to daily life and the increase in average life expectancy will contribute to its onset. This review will consider the disorders of the ocular surface that give rise to such a widespread pathology. At the end, the most recent therapeutic options for the management of DE will be briefly discussed according to the specific underlying pathology.
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Affiliation(s)
- Marcella Nebbioso
- Department of Sense Organs, Policlinico Umberto I, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
| | - Paola Del Regno
- Department of Sense Organs, Policlinico Umberto I, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
| | - Magda Gharbiya
- Department of Sense Organs, Policlinico Umberto I, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
| | - Marta Sacchetti
- Department of Sense Organs, Policlinico Umberto I, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
| | - Rocco Plateroti
- Department of Sense Organs, Policlinico Umberto I, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
| | - Alessandro Lambiase
- Department of Sense Organs, Policlinico Umberto I, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
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50
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Degradation of proteoglycan 4/lubricin by cathepsin S: Potential mechanism for diminished ocular surface lubrication in Sjögren's syndrome. Exp Eye Res 2017; 161:1-9. [DOI: 10.1016/j.exer.2017.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 04/21/2017] [Accepted: 05/19/2017] [Indexed: 11/15/2022]
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