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Gupta P, Choudhari V, Kumar R. Exploring the genetic mechanisms: SELP gene's contribution to alleviating vaso-occlusive crisis in sickle cell disease. Gene 2024; 928:148805. [PMID: 39079562 DOI: 10.1016/j.gene.2024.148805] [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: 05/15/2024] [Revised: 07/09/2024] [Accepted: 07/26/2024] [Indexed: 08/03/2024]
Abstract
Sickle cell disease is a catastrophic inflammatory disorder characterized by microvascular vaso-occlusion, leading to high morbidity and increased mortality. P-selectin, a cell adhesion molecule, plays a crucial role in the pathogenesis and severity of sickle cell disease. Its expression and binding with its ligand PSGL-1 is involved in various mechanisms that contribute to inflammation and immune response, resulting in complications in sickle cell disease. Preclinical data have verified the efficacy of P-Selectin inhibition in mitigating vaso-occlusive events and severity of disease. Currently clinical trials are ongoing to evaluate the safety and efficiency of P-Selectin-targeted therapies and concede the challenges and limitations associated with their use. Despite of its proven role in reducing severity in sickle cell disease, future research should focus on identifying other novel targets within the adhesion cascade and explore combination therapies. Conducting trials and addressing concerns about accessibility are crucial steps towards fully harnessing the potential of P selectin inhibitors as a groundbreaking treatment option. This review focuses on understanding the role of p selectin and its interactions with molecules involved in inflammation providing insights about the molecular etiology, pathophysiology, and potential therapeutic targets in sickle cell disease.
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Affiliation(s)
- Parul Gupta
- ICMR-National Institute of Research in Tribal Health, India
| | | | - Ravindra Kumar
- ICMR-National Institute of Research in Tribal Health, India.
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2
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Ma W, Wu D, Long C, Liu J, Xu L, Zhou L, Dou Q, Ge Y, Zhou C, Jia R. Neutrophil-derived nanovesicles deliver IL-37 to mitigate renal ischemia-reperfusion injury via endothelial cell targeting. J Control Release 2024; 370:66-81. [PMID: 38631490 DOI: 10.1016/j.jconrel.2024.04.025] [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: 12/19/2023] [Revised: 04/09/2024] [Accepted: 04/14/2024] [Indexed: 04/19/2024]
Abstract
Renal ischemia-reperfusion injury (IRI) is one of the most important causes of acute kidney injury (AKI). Interleukin (IL)-37 has been suggested as a novel anti-inflammatory factor for the treatment of IRI, but its application is still limited by its low stability and delivery efficiency. In this study, we reported a novel engineered method to efficiently and easily prepare neutrophil membrane-derived vesicles (N-MVs), which could be utilized as a promising vehicle to deliver IL-37 and avoid the potential side effects of neutrophil-derived natural extracellular vesicles. N-MVs could enhance the stability of IL-37 and targetedly deliver IL-37 to damaged endothelial cells of IRI kidneys via P-selectin glycoprotein ligand-1 (PSGL-1). In vitro and in vivo evidence revealed that N-MVs encapsulated with IL-37 (N-MV@IL-37) could inhibit endothelial cell apoptosis, promote endothelial cell proliferation and angiogenesis, and decrease inflammatory factor production and leukocyte infiltration, thereby ameliorating renal IRI. Our study establishes a promising delivery vehicle for the treatment of renal IRI and other endothelial damage-related diseases.
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Affiliation(s)
- Wenjie Ma
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Di Wu
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Chengcheng Long
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Jingyu Liu
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Luwei Xu
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Liuhua Zhou
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Quanliang Dou
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Yuzheng Ge
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China
| | - Changcheng Zhou
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China.
| | - Ruipeng Jia
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China.
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3
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Sladek V, Šmak P, Tvaroška I. How E-, L-, and P-Selectins Bind to sLe x and PSGL-1: A Quantification of Critical Residue Interactions. J Chem Inf Model 2023; 63:5604-5618. [PMID: 37486087 DOI: 10.1021/acs.jcim.3c00704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Selectins and their ability to interact with specific ligands are a cornerstone in cell communication. Over the last three decades, a considerable wealth of experimental and molecular modeling insights into their structure and modus operandi were gathered. Nonetheless, explaining the role of individual selectin residues on a quantitative level remained elusive, despite its importance in understanding the structure-function relationship in these molecules and designing their inhibitors. This work explores essential interactions of selectin-ligand binding, employing a multiscale approach that combines molecular dynamics, quantum-chemical calculations, and residue interaction network models. Such an approach successfully reproduces most of the experimental findings. It proves to be helpful, with the potential for becoming an established tool for quantitative predictions of residue contribution to the binding of biomolecular complexes. The results empower us to quantify the importance of particular residues and functional groups in the protein-ligand interface and to pinpoint differences in molecular recognition by the three selectins. We show that mutations in the E-, L-, and P-selectins, e.g., different residues in positions 46, 85, 97, and 107, present a crucial difference in how the ligand is engaged. We assess the role of sulfation of tyrosine residues in PSGL-1 and suggest that TyrSO3- in position 51 interacting with Arg85 in P-selectin is a significant factor in the increased affinity of P-selectin to PSGL-1 compared to E- and L-selectins. We propose an original pharmacophore targeting five essential PSGL-binding sites based on the analysis of the selectin···PSGL-1 interactions.
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Affiliation(s)
- Vladimir Sladek
- Institute of Chemistry, SAS, Dubravska cesta 9, 84538 Bratislava, Slovakia
| | - Pavel Šmak
- Department of Biochemistry, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Igor Tvaroška
- Institute of Chemistry, SAS, Dubravska cesta 9, 84538 Bratislava, Slovakia
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4
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Staphylococcus aureus Causes the Arrest of Neutrophils in the Bloodstream in a Septicemia Model. Microorganisms 2022; 10:microorganisms10091696. [PMID: 36144298 PMCID: PMC9502802 DOI: 10.3390/microorganisms10091696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/15/2022] [Accepted: 08/22/2022] [Indexed: 12/05/2022] Open
Abstract
Staphylococcus aureus induces the expression of VCAM-1, P- and E-selectins on the endothelial cells of the EA.hy926 cell line but, at the same time, causes the significant suppression of the force and work of adhesion between these receptors of endotheliocytes and the receptors of neutrophils in an experimental septicemia model. Adhesion contacts between the receptors of neutrophils and endotheliocytes are statistically significantly suppressed under non-opsonized and opsonized S. aureus treatment, which disrupts the initial stage of transendothelial migration of neutrophils—adhesion. Thus, S. aureus causes the arrest of neutrophils in the bloodstream in an experimental septicemia model.
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5
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Wang J, Chen MS, Wang RS, Hu JQ, Liu S, Wang YYF, Xing XL, Zhang BW, Liu JM, Wang S. Current Advances in Structure-Function Relationships and Dose-Dependent Effects of Human Milk Oligosaccharides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:6328-6353. [PMID: 35593935 DOI: 10.1021/acs.jafc.2c01365] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
HMOs (human milk oligosaccharides) are the third most important nutrient in breast milk. As complex glycans, HMOs play an important role in regulating neonatal intestinal immunity, resisting viral and bacterial infections, displaying anti-inflammatory characteristics, and promoting brain development. Although there have been some previous reports of HMOs, a detailed literature review summarizing the structure-activity relationships and dose-dependent effects of HMOs is lacking. Hence, after introducing the structures and synthetic pathways of HMOs, this review summarizes and categorizes identified structure-function relationships of HMOs. Differential mechanisms of different structural HMOs utilization by microorganisms are summarized. This review also emphasizes the recent advances in the interactions between different health benefits and the variance of dosage effect based on in vitro cell tests, animal experiments, and human intervention studies. The potential relationships between the chemical structure, the dosage selection, and the physiological properties of HMOs as functional foods are vital for further understanding of HMOs and their future applications.
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Affiliation(s)
- Jin Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Meng-Shan Chen
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Rui-Shan Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Jia-Qiang Hu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Shuang Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Yuan-Yi-Fei Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Xiao-Long Xing
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Bo-Wei Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Jing-Min Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
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6
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Critcher M, Hassan AA, Huang ML. Seeing the forest through the trees: characterizing the glycoproteome. Trends Biochem Sci 2022; 47:492-505. [DOI: 10.1016/j.tibs.2022.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 02/10/2022] [Accepted: 02/21/2022] [Indexed: 12/14/2022]
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7
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Šmak P, Tvaroška I, Koča J. The catalytic reaction mechanism of tyrosylprotein sulfotransferase-1. Phys Chem Chem Phys 2021; 23:23850-23860. [PMID: 34647946 DOI: 10.1039/d1cp03718h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tyrosine sulfation alters the biological activity of many proteins involved in different physiological and pathophysiological conditions, such as non-specific immune reaction, response to inflammation and ischemia, targeting of leukocytes and stem cells, or the formation of cancer metastases. Tyrosine sulfation is catalyzed by the enzymes tyrosylprotein sulfotransferases (TPST). In this study, we used QM/MM Car-Parrinello metadynamics simulations together with QM/MM potential energy calculations to investigate the catalytic mechanism of isoform TPST-1. The structural changes along the reaction coordinate are analyzed and discussed. Furthermore, both the methods supported the SN2 type of catalytic mechanism. The reaction barrier obtained from CPMD metadynamics was 12.8 kcal mol-1, and the potential energy scan led to reaction barriers of 11.6 kcal mol-1 and 13.7 kcal mol-1 with the B3LYP and OPBE functional, respectively. The comparison of the two methods (metadynamics and potential energy scan) may be helpful for future mechanistic studies. The insight into the reaction mechanism of TPST-1 might help with the rational design of transition-state TPST inhibitors.
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Affiliation(s)
- Pavel Šmak
- National Center for Biomolecular Research (NCBR), Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Igor Tvaroška
- National Center for Biomolecular Research (NCBR), Faculty of Science, Masaryk University, Brno, Czech Republic.,Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic.
| | - Jaroslav Koča
- National Center for Biomolecular Research (NCBR), Faculty of Science, Masaryk University, Brno, Czech Republic.,Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic
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8
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Pleskova SN, Bobyk SZ, Kriukov RN, Gorshkova EN, Novikov DV, Vasilchikov PI, Bezrukov NA, Novikov VV. S. aureus and E. coli change the force and work of adhesion between P- and E-selectins of endothelial cells and ligands of neutrophil granulocytes. Micron 2021; 150:103139. [PMID: 34428610 DOI: 10.1016/j.micron.2021.103139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/14/2021] [Accepted: 08/18/2021] [Indexed: 01/10/2023]
Abstract
Thanks to the modification of the force spectroscopy method, when a neutrophil is fixed on the tip, and an endotheliocyte culture is grown on the substrate, the exact indicators of the adhesion force and adhesion work between cells have been investigated. The high variability of adhesion contacts in different donors associated with different expression profiles of neutrophils. It was found by flow cytometry that the EA.hy926 cell line actively expresses VCAM-1, as well as P- and E-selectin under the Staphylococcus aureus influence after 60 min of co-incubation. At the same time, the integral indicators of the adhesion force and adhesion work in the "neutrophil - endothelial cell" interaction were significantly inhibited by S. aureus in all studied donors. Since the VCAM-1 receptor is not involved in the adhesion bonds between neutrophils and endothelial cells, the suppression of the interaction is associated with the inhibition of P- and E-selectins, but direct receptors removal from the endothelial cells surface of the EA.hy926 cell line does not occur. Escherichia coli causes multidirectional effects in the system of interaction "neutrophil - endothelial cell", depending on the expression profile of the donor's neutrophils. However, the cumulative effect of interaction from all donors shows that in general, under the influence of E. coli, there is an increase in adhesion force and a suppression of adhesion work.
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Affiliation(s)
- S N Pleskova
- Research and Education Center for Physics of Solid State Nanostructures, Lobachevsky State University of Nizhny Novgorod, Gagarina Ave., 23, 603950, Nizhny Novgorod, Russia; Department "Nanotechnology and Biotechnology", R.E. Alekseev Technical State University of Nizhny Novgorod, Minina St., 24, 603155, Nizhny Novgorod, Russia.
| | - S Z Bobyk
- Research and Education Center for Physics of Solid State Nanostructures, Lobachevsky State University of Nizhny Novgorod, Gagarina Ave., 23, 603950, Nizhny Novgorod, Russia
| | - R N Kriukov
- Research and Education Center for Physics of Solid State Nanostructures, Lobachevsky State University of Nizhny Novgorod, Gagarina Ave., 23, 603950, Nizhny Novgorod, Russia
| | - E N Gorshkova
- Department of Molecular Biology and Immunology, Lobachevsky State University of Nizhny Novgorod, Gagarina Ave., 23, 603950, Nizhny Novgorod, Russia
| | - D V Novikov
- Nizhniy Novgorod Research Institute of Epidemiology and Microbiology named after Academician I.N. Blokhina, Malaya Yamskaya St., 71, Nizhny Novgorod, Russia
| | - P I Vasilchikov
- Department of Molecular Biology and Immunology, Lobachevsky State University of Nizhny Novgorod, Gagarina Ave., 23, 603950, Nizhny Novgorod, Russia
| | - N A Bezrukov
- Department "Nanotechnology and Biotechnology", R.E. Alekseev Technical State University of Nizhny Novgorod, Minina St., 24, 603155, Nizhny Novgorod, Russia
| | - V V Novikov
- Nizhniy Novgorod Research Institute of Epidemiology and Microbiology named after Academician I.N. Blokhina, Malaya Yamskaya St., 71, Nizhny Novgorod, Russia
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9
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Trypanosoma cruzi Exploits E- and P-Selectins to Migrate Across Endothelial Cells and Extracellular Matrix Proteins. Infect Immun 2021; 89:e0017821. [PMID: 34228487 DOI: 10.1128/iai.00178-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Chagas disease parasite Trypanosoma cruzi must extravasate to home in on susceptible cells residing in most tissues. It remains unknown how T. cruzi undertakes this crucial step of its life cycle. We hypothesized that the pathogen exploits the endothelial cell programming leukocytes use to extravasate to sites of inflammation. Transendothelial migration (TEM) starts after inflammatory cytokines induce E-selectin expression and P-selectin translocation on endothelial cells (ECs), enabling recognition by leukocyte ligands that engender rolling cell adhesion. Here we show that T. cruzi upregulates E- and P-selectins in cardiac ECs to which it binds in a ligand-receptor fashion, whether under static or shear flow conditions. Glycoproteins isolated from T. cruzi (TcEx) specifically recognize P-selectin in a ligand-receptor interaction. As with leukocytes, binding of P-selectin to T. cruzi or TcEx requires sialic acid and tyrosine sulfate, which are pivotal for downstream migration across ECs and extracellular matrix proteins. Additionally, soluble selectins, which bind T. cruzi, block transendothelial migration dose-dependently, implying that the pathogen bears selectin-binding ligand(s) that start transmigration. Furthermore, function-blocking antibodies against E- and P-selectins, which act on endothelial cells and not T. cruzi, are exquisite in preventing TEM. Thus, our results show that selectins can function as mediators of T. cruzi transendothelial transmigration, suggesting a pathogenic mechanism that allows homing in of the parasite on targeted tissues. As selectin inhibitors are sought-after therapeutic targets for autoimmune diseases and cancer metastasis, they may similarly represent a novel strategy for Chagas disease therapy.
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10
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Schäfer D, Tomiuk S, Küster LN, Rawashdeh WA, Henze J, Tischler-Höhle G, Agorku DJ, Brauner J, Linnartz C, Lock D, Kaiser A, Herbel C, Eckardt D, Lamorte M, Lenhard D, Schüler J, Ströbel P, Missbach-Guentner J, Pinkert-Leetsch D, Alves F, Bosio A, Hardt O. Identification of CD318, TSPAN8 and CD66c as target candidates for CAR T cell based immunotherapy of pancreatic adenocarcinoma. Nat Commun 2021; 12:1453. [PMID: 33674603 PMCID: PMC7935963 DOI: 10.1038/s41467-021-21774-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 02/09/2021] [Indexed: 12/17/2022] Open
Abstract
A major roadblock prohibiting effective cellular immunotherapy of pancreatic ductal adenocarcinoma (PDAC) is the lack of suitable tumor-specific antigens. To address this challenge, here we combine flow cytometry screenings, bioinformatic expression analyses and a cyclic immunofluorescence platform. We identify CLA, CD66c, CD318 and TSPAN8 as target candidates among 371 antigens and generate 32 CARs specific for these molecules. CAR T cell activity is evaluated in vitro based on target cell lysis, T cell activation and cytokine release. Promising constructs are evaluated in vivo. CAR T cells specific for CD66c, CD318 and TSPAN8 demonstrate efficacies ranging from stabilized disease to complete tumor eradication with CD318 followed by TSPAN8 being the most promising candidates for clinical translation based on functionality and predicted safety profiles. This study reveals potential target candidates for CAR T cell based immunotherapy of PDAC together with a functional set of CAR constructs specific for these molecules.
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Affiliation(s)
- Daniel Schäfer
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
- University Medical Center Göttingen, Clinic for Hematology and Medical Oncology, Göttingen, Lower Saxony, Germany
- University Medical Center Göttingen, Institute for Diagnostic and Interventional Radiology, Göttingen, Lower Saxony, Germany
| | - Stefan Tomiuk
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Laura N Küster
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Wa'el Al Rawashdeh
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Janina Henze
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
- University Medical Center Göttingen, Clinic for Hematology and Medical Oncology, Göttingen, Lower Saxony, Germany
- University Medical Center Göttingen, Institute for Diagnostic and Interventional Radiology, Göttingen, Lower Saxony, Germany
| | | | - David J Agorku
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Janina Brauner
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Cathrin Linnartz
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Dominik Lock
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Andrew Kaiser
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Christoph Herbel
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Dominik Eckardt
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Melina Lamorte
- Charles River Discovery Research Services GmbH, Freiburg, Baden-Wuerttemberg, Germany
| | - Dorothee Lenhard
- Charles River Discovery Research Services GmbH, Freiburg, Baden-Wuerttemberg, Germany
| | - Julia Schüler
- Charles River Discovery Research Services GmbH, Freiburg, Baden-Wuerttemberg, Germany
| | - Philipp Ströbel
- University Medical Center Göttingen, Institute for Pathology, Göttingen, Lower Saxony, Germany
| | - Jeannine Missbach-Guentner
- University Medical Center Göttingen, Institute for Diagnostic and Interventional Radiology, Göttingen, Lower Saxony, Germany
| | - Diana Pinkert-Leetsch
- University Medical Center Göttingen, Institute for Diagnostic and Interventional Radiology, Göttingen, Lower Saxony, Germany
- Max Planck Institute for Experimental Medicine, Translational Molecular Imaging, Göttingen, Lower Saxony, Germany
| | - Frauke Alves
- University Medical Center Göttingen, Clinic for Hematology and Medical Oncology, Göttingen, Lower Saxony, Germany
- University Medical Center Göttingen, Institute for Diagnostic and Interventional Radiology, Göttingen, Lower Saxony, Germany
- Max Planck Institute for Experimental Medicine, Translational Molecular Imaging, Göttingen, Lower Saxony, Germany
| | - Andreas Bosio
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany
| | - Olaf Hardt
- Miltenyi Biotec GmbH, R&D, Bergisch Gladbach, North Rhine-Westphalia, Germany.
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11
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DeRogatis JM, Viramontes KM, Neubert EN, Tinoco R. PSGL-1 Immune Checkpoint Inhibition for CD4 + T Cell Cancer Immunotherapy. Front Immunol 2021; 12:636238. [PMID: 33708224 PMCID: PMC7940186 DOI: 10.3389/fimmu.2021.636238] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/04/2021] [Indexed: 01/15/2023] Open
Abstract
Immune checkpoint inhibition targeting T cells has shown tremendous promise in the treatment of many cancer types and are now standard therapies for patients. While standard therapies have focused on PD-1 and CTLA-4 blockade, additional immune checkpoints have shown promise in promoting anti-tumor immunity. PSGL-1, primarily known for its role in cellular migration, has also been shown to function as a negative regulator of CD4+ T cells in numerous disease settings including cancer. PSGL-1 is highly expressed on T cells and can engage numerous ligands that impact signaling pathways, which may modulate CD4+ T cell differentiation and function. PSGL-1 engagement in the tumor microenvironment may promote CD4+ T cell exhaustion pathways that favor tumor growth. Here we highlight that blocking the PSGL-1 pathway on CD4+ T cells may represent a new cancer therapy approach to eradicate tumors.
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Affiliation(s)
| | | | | | - Roberto Tinoco
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
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12
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Cai Z, Yan Y, Zhou J, Yang Y, Zhang Y, Chen J. Multifunctionalized Brush-Like Glycopolymers with High Affinity to P-Selectin and Antitumor Metastasis Activity. Biomacromolecules 2021; 22:1177-1185. [PMID: 33586430 DOI: 10.1021/acs.biomac.0c01689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Glycopolymers that can mimic natural glycosaminoglycan, such as heparin, have shown great potentials in inhibition of cancer metastasis. In the current work, a novel series of brush-like glycopolymers (BGPs) with simultaneous functionalization of various monosaccharide or disaccharide compositions have been synthesized through a new grafting-polymerization strategy, in order to mimic the activities of both heparin and P-selectin ligand PSGL-1. In the subsequent in vitro assays of antiadhesion, platelets activation, heparanase inhibition, and so on, BGP-SFH, as one of the BGPs with the composition of the combined three sugar units, sialic acids, fucoses, and heparin disaccharides, showed the highest antimetastasis ability, similar to its prototype heparin. Moreover, in a mouse metastatic melanoma model, the BGP-SFH also inhibited B16 cell metastasis effectively. Thus, the current work not only demonstrated a type of promising antimetastasis glycopolymer BGPs, but also illustrated an easy synthetic approach to multifunctionalized glycopolymers, leading to potential applications for broader biomedical research.
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Affiliation(s)
- Zhi Cai
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Yishu Yan
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Juan Zhou
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Yang Yang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Yan Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Jinghua Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, People's Republic of China
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Salta J, Arp FF, Kühne C, Reissig H. Multivalent 1,2,3‐Triazole‐Linked Carbohydrate Mimetics by Huisgen–Meldal‐Sharpless Cycloadditions of an Azidopyran. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Joana Salta
- Institut für Chemie und Biochemie Freie Universität Berlin Takustrasse 3 14195 Berlin Germany
| | - Fabian F. Arp
- Institut für Chemie und Biochemie Freie Universität Berlin Takustrasse 3 14195 Berlin Germany
| | - Christian Kühne
- Institut für Laboratoriumsmedizin Klinische Chemie und Pathobiochemie Charité‐Universitätsmedizin Berlin Augustenburger Platz 1 13353 Berlin Germany
| | - Hans‐Ulrich Reissig
- Institut für Chemie und Biochemie Freie Universität Berlin Takustrasse 3 14195 Berlin Germany
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14
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Tvaroška I, Selvaraj C, Koča J. Selectins-The Two Dr. Jekyll and Mr. Hyde Faces of Adhesion Molecules-A Review. Molecules 2020; 25:molecules25122835. [PMID: 32575485 PMCID: PMC7355470 DOI: 10.3390/molecules25122835] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/27/2020] [Accepted: 06/17/2020] [Indexed: 02/06/2023] Open
Abstract
Selectins belong to a group of adhesion molecules that fulfill an essential role in immune and inflammatory responses and tissue healing. Selectins are glycoproteins that decode the information carried by glycan structures, and non-covalent interactions of selectins with these glycan structures mediate biological processes. The sialylated and fucosylated tetrasaccharide sLex is an essential glycan recognized by selectins. Several glycosyltransferases are responsible for the biosynthesis of the sLex tetrasaccharide. Selectins are involved in a sequence of interactions of circulated leukocytes with endothelial cells in the blood called the adhesion cascade. Recently, it has become evident that cancer cells utilize a similar adhesion cascade to promote metastases. However, like Dr. Jekyll and Mr. Hyde’s two faces, selectins also contribute to tissue destruction during some infections and inflammatory diseases. The most prominent function of selectins is associated with the initial stage of the leukocyte adhesion cascade, in which selectin binding enables tethering and rolling. The first adhesive event occurs through specific non-covalent interactions between selectins and their ligands, with glycans functioning as an interface between leukocytes or cancer cells and the endothelium. Targeting these interactions remains a principal strategy aimed at developing new therapies for the treatment of immune and inflammatory disorders and cancer. In this review, we will survey the significant contributions to and the current status of the understanding of the structure of selectins and the role of selectins in various biological processes. The potential of selectins and their ligands as therapeutic targets in chronic and acute inflammatory diseases and cancer will also be discussed. We will emphasize the structural characteristic of selectins and the catalytic mechanisms of glycosyltransferases involved in the biosynthesis of glycan recognition determinants. Furthermore, recent achievements in the synthesis of selectin inhibitors will be reviewed with a focus on the various strategies used for the development of glycosyltransferase inhibitors, including substrate analog inhibitors and transition state analog inhibitors, which are based on knowledge of the catalytic mechanism.
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Affiliation(s)
- Igor Tvaroška
- Central European Institute of Technology (CEITEC), Masaryk University, 62500 Brno, Czech Republic
- Institute of Chemistry, Slovak Academy of Sciences, 84538 Bratislava, Slovak Republic
- Correspondence: (I.T.); (J.K.); Tel.: +421-948-535-601 (I.T.); +420-731-682-606 (J.K.)
| | - Chandrabose Selvaraj
- Central European Institute of Technology (CEITEC), Masaryk University, 62500 Brno, Czech Republic
| | - Jaroslav Koča
- Central European Institute of Technology (CEITEC), Masaryk University, 62500 Brno, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, 62500 Brno, Czech Republic
- Correspondence: (I.T.); (J.K.); Tel.: +421-948-535-601 (I.T.); +420-731-682-606 (J.K.)
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15
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Salta J, Reissig H. Divalent Triazole‐Linked Carbohydrate Mimetics: Synthesis by Click Chemistry and Evaluation as Selectin Ligands. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000618] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Joana Salta
- Institut für Chemie und Biochemie Freie Universität Berlin Takustrasse 3 14195 Berlin Germany
| | - Hans‐Ulrich Reissig
- Institut für Chemie und Biochemie Freie Universität Berlin Takustrasse 3 14195 Berlin Germany
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16
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De Bousser E, Meuris L, Callewaert N, Festjens N. Human T cell glycosylation and implications on immune therapy for cancer. Hum Vaccin Immunother 2020; 16:2374-2388. [PMID: 32186959 PMCID: PMC7644206 DOI: 10.1080/21645515.2020.1730658] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Glycosylation is an important post-translational modification, giving rise to a diverse and abundant repertoire of glycans on the cell surface, collectively known as the glycome. When focusing on immunity, glycans are indispensable in virtually all signaling and cell-cell interactions. More specifically, glycans have been shown to regulate key pathophysiological steps within T cell biology such as T cell development, thymocyte selection, T cell activity and signaling as well as T cell differentiation and proliferation. They are of major importance in determining the interaction of human T cells with tumor cells. In this review, we will describe the role of glycosylation of human T cells in more depth, elaborate on the importance of glycosylation in the interaction of human T cells with tumor cells and discuss the potential of cancer immunotherapies that are based on manipulating the glycome functions at the tumor immune interface.1,2
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Affiliation(s)
- Elien De Bousser
- VIB-UGent Center for Medical Biotechnology , Ghent, Belgium.,Department of Biochemistry and Microbiology, Ghent University , Ghent, Belgium
| | - Leander Meuris
- VIB-UGent Center for Medical Biotechnology , Ghent, Belgium.,Department of Biochemistry and Microbiology, Ghent University , Ghent, Belgium
| | - Nico Callewaert
- VIB-UGent Center for Medical Biotechnology , Ghent, Belgium.,Department of Biochemistry and Microbiology, Ghent University , Ghent, Belgium
| | - Nele Festjens
- VIB-UGent Center for Medical Biotechnology , Ghent, Belgium.,Department of Biochemistry and Microbiology, Ghent University , Ghent, Belgium
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17
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Glycans and glycosaminoglycans in neurobiology: key regulators of neuronal cell function and fate. Biochem J 2018; 475:2511-2545. [PMID: 30115748 DOI: 10.1042/bcj20180283] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 07/14/2018] [Accepted: 07/18/2018] [Indexed: 12/16/2022]
Abstract
The aim of the present study was to examine the roles of l-fucose and the glycosaminoglycans (GAGs) keratan sulfate (KS) and chondroitin sulfate/dermatan sulfate (CS/DS) with selected functional molecules in neural tissues. Cell surface glycans and GAGs have evolved over millions of years to become cellular mediators which regulate fundamental aspects of cellular survival. The glycocalyx, which surrounds all cells, actuates responses to growth factors, cytokines and morphogens at the cellular boundary, silencing or activating downstream signaling pathways and gene expression. In this review, we have focused on interactions mediated by l-fucose, KS and CS/DS in the central and peripheral nervous systems. Fucose makes critical contributions in the area of molecular recognition and information transfer in the blood group substances, cytotoxic immunoglobulins, cell fate-mediated Notch-1 interactions, regulation of selectin-mediated neutrophil extravasation in innate immunity and CD-34-mediated new blood vessel development, and the targeting of neuroprogenitor cells to damaged neural tissue. Fucosylated glycoproteins regulate delivery of synaptic neurotransmitters and neural function. Neural KS proteoglycans (PGs) were examined in terms of cellular regulation and their interactive properties with neuroregulatory molecules. The paradoxical properties of CS/DS isomers decorating matrix and transmembrane PGs and the positive and negative regulatory cues they provide to neurons are also discussed.
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18
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Baba M, Batanova T, Kitoh K, Takashima Y. Adhesion of Toxoplasma gondii tachyzoite-infected vehicle leukocytes to capillary endothelial cells triggers timely parasite egression. Sci Rep 2017; 7:5675. [PMID: 28720868 PMCID: PMC5515940 DOI: 10.1038/s41598-017-05956-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 06/07/2017] [Indexed: 12/15/2022] Open
Abstract
Intracellular pathogens have numerous strategies for effective dissemination within the host. Many intracellular pathogens first infect leukocytes, which they use as a vehicle to transport them to target organs. Once at the target organ, intracellular parasite Toxoplasma gondii can cross the capillary wall in extracellular form by infecting endothelial cells. However, after egression from leukocytes, extracellular parasites face the risk of host immune attack. In this study, observation of infected mouse organs, using a method that renders tissue transparent, revealed that adhesion of tachyzoite-infected leukocytes to endothelial cells triggers immediate egression of the parasite. This signal enables the parasite to time egression from its vehicle leukocyte to coincide with arrival at a target organ, minimizing the opportunity for immune attack during the transition from a vehicle leukocyte to capillary endothelial cells.
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Affiliation(s)
- Minami Baba
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Tatiana Batanova
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Katsuya Kitoh
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Yasuhiro Takashima
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
- Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), 1-1 Yanagido, Gifu, 501-1193, Japan.
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19
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Hassani-Ardekani H, Niroomand-Oscuii H, Nikbin E, Shamloo A. Molecular dynamics simulation of the dissociation mechanism of P-selectin from PSGL-1. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2017. [DOI: 10.1142/s0219633617500353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Interactions between P-selectin, expressed on activated endothelium, and its counterpart P-selectin glycoprotein ligand-1 (PSGL-1), expressed on leukocytes, play a pivotal role in adhesive events that recruit circulating leukocytes toward inflamed or injured tissues. Atomistic understanding of the association and dissociation of these bonds under blood flow is necessary to define the underlying mechanism. In this study, steered molecular dynamics (SMD) simulations were applied to investigate the conformational changes of P-LE/SGP-3 construct (an effective binding unit of the P-selectin/PSGL-1 complex) under stretching with constant velocity. In the present simulations, a self-built force field parameterization was developed for sulfated tyrosine by using force field toolkit of Visual Molecular Dynamics (VMD) program. A dissociation mechanism was represented by analyzing the nonbonded energies between interface residues. The results indicate that the salt bridges between P-LE and SGP-3 and the hydrogen bonds between ion Ca[Formula: see text] and residue fucose of glycan group of PSGL-1 and also between sulfated tyrosine residues are the most effective bonds in binding. Finally, potential of mean force (PMF) was calculated by averaging the outcomes of eight independent runs and the results were discussed.
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Affiliation(s)
- Hajar Hassani-Ardekani
- Department of Biomechanical Engineering, Sahand University of Technology, Tabriz, Iran
- Department of Mechanical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran
| | | | - Ehsan Nikbin
- Department of Physics, Sharif University of Technology, Tehran, Iran
| | - Amir Shamloo
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
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20
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Tao L, Changfu W, Linyun L, Bing M, Xiaohui H. Correlations of platelet-leukocyte aggregates with P-selectin S290N and P-selectin glycoprotein ligand-1 M62I genetic polymorphisms in patients with acute ischemic stroke. J Neurol Sci 2016; 367:95-100. [DOI: 10.1016/j.jns.2016.05.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 05/09/2016] [Accepted: 05/23/2016] [Indexed: 01/10/2023]
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21
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A Panel of Recombinant Mucins Carrying a Repertoire of Sialylated O-Glycans Based on Different Core Chains for Studies of Glycan Binding Proteins. Biomolecules 2015; 5:1810-31. [PMID: 26274979 PMCID: PMC4598776 DOI: 10.3390/biom5031810] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/03/2015] [Accepted: 08/04/2015] [Indexed: 01/26/2023] Open
Abstract
Sialylated glycans serve as key elements of receptors for many viruses, bacteria, and bacterial toxins. The microbial recognition and their binding specificity can be affected by the linkage of the terminal sugar residue, types of underlying sugar chains, and the nature of the entire glycoconjugate. Owing to the pathobiological significance of sialylated glycans, we have engineered Chinese hamster ovary (CHO) cells to secrete mucin-type immunoglobulin-fused proteins carrying terminal α2,3- or α2,6-linked sialic acid on defined O-glycan core saccharide chains. Besides stably expressing P-selectin glycoprotein ligand-1/mouse immunoglobulin G2b cDNA (PSGL-1/mIgG2b), CHO cells were stably transfected with plasmids encoding glycosyltransferases to synthesize core 2 (GCNT1), core 3 (B3GNT6), core 4 (GCNT1 and B3GNT6), or extended core 1 (B3GNT3) chains with or without the type 1 chain-encoding enzyme B3GALT5 and ST6GAL1. Western blot and liquid chromatography-mass spectrometry analysis confirmed the presence of core 1, 2, 3, 4, and extended core 1 chains carrying either type 1 (Galb3GlcNAc) or type 2 (Galb4GlcNAc) outer chains with or without α2,6-linked sialic acids. This panel of recombinant mucins carrying a repertoire of sialylated O-glycans will be important tools in studies aiming at determining the fine O-glycan binding specificity of sialic acid-specific microbial adhesins and mammalian lectins.
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22
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Salta J, Dernedde J, Reissig HU. Synthesis of multivalent carbohydrate mimetics with aminopolyol end groups and their evaluation as L-selectin inhibitors. Beilstein J Org Chem 2015; 11:638-46. [PMID: 26124866 PMCID: PMC4464473 DOI: 10.3762/bjoc.11.72] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 04/21/2015] [Indexed: 11/23/2022] Open
Abstract
In this article a series of divalent and trivalent carbohydrate mimetics on the basis of an enantiopure aminopyran and of serinol is described. These aminopolyols are connected by amide bonds to carboxylic acid derived spacer units either by Schotten-Baumann acylation or by coupling employing HATU as reagent. The O-sulfation employing the SO3·DMF complex was optimized. It was crucial to follow this process by 700 MHz (1)H NMR spectroscopy to ensure full conversion and to use a refined neutralization and purification protocol. Many of the compounds could not be tested as L-selectin inhibitor by SPR due to their insolubility in water, nevertheless, a divalent and a trivalent amide showed surprisingly good activities with IC50 values in the low micromolar range.
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Affiliation(s)
- Joana Salta
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustrasse 3, D-14195 Berlin, Germany
| | - Jens Dernedde
- Charité Universitätsmedizin Berlin, Institut für Laboratoriumsmedizin, Klinische Chemie und Pathobiochemie, Campus Virchow Klinikum, Augustenburger Platz 1, D-13353 Berlin, Germany
| | - Hans-Ulrich Reissig
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustrasse 3, D-14195 Berlin, Germany
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23
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Umeki S, Suzuki R, Ema Y, Shimojima M, Nishimura Y, Okuda M, Mizuno T. Anti-adhesive property of P-selectin glycoprotein ligand-1 (PSGL-1) due to steric hindrance effect. J Cell Biochem 2014. [PMID: 23192782 DOI: 10.1002/jcb.24468] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
P-selectin glycoprotein ligand-1 (PSGL-1) is an adhesive molecule that is known to be a ligand for P-selectin. An anti-adhesive property of PSGL-1 has not been previously reported. In this study, we show that PSGL-1 expression is anti-adhesive for adherent cells and we have elucidated the underlying mechanism. Overexpression of PSGL-1 induced cell rounding and floating in HEK293T cells. Similar phenomena were demonstrated in other adherent cell lines with overexpression of PSGL-1. PSGL-1 overexpression inhibits access of antibodies to cell surface molecules such as integrins, HLA and CD25. Cells transfected with PSGL-1 deletion mutants that lack a large part of the extracellular domain and chimeric construct expressing extracellular CD86 and intracellular PSGL-1 only showed rounded morphology, but there are no floating cells. These results indicated that PSGL-1 causes steric hindrance due to the extended structure of its extracellular domain that is highly O-glycosylated, but intracellular domain also has some effect on cell rounding. This study implies that PSGL-1 has Janus-faced functions, being both adhesive and anti-adhesive.
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Affiliation(s)
- Saori Umeki
- The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
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24
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Impellizzeri D, Cuzzocrea S. Targeting selectins for the treatment of inflammatory diseases. Expert Opin Ther Targets 2013; 18:55-67. [DOI: 10.1517/14728222.2013.841140] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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25
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Ultrasound Molecular Imaging Contrast Agent Binding to Both E- and P-Selectin in Different Species. Invest Radiol 2012; 47:516-23. [DOI: 10.1097/rli.0b013e31825cc605] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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26
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Chen AY, Ha JN, Delano FA, Schmid-Schönbein GW. Receptor cleavage and P-selectin-dependent reduction of leukocyte adhesion in the spontaneously hypertensive rat. J Leukoc Biol 2012; 92:183-94. [PMID: 22566571 DOI: 10.1189/jlb.0112010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The SHR, a genetic model for hypertension and the metabolic syndrome, has attenuated leukocyte adhesion to the postcapillary endothelium by an unknown mechanism. Based on recent evidence of elevated levels of MMPs in plasma and on microvascular endothelium of the SHR with cleavage of several receptor types, we hypothesize that the reduced leukocyte-endothelial interaction is a result of enhanced proteolytic cleavage of P-selectin on the postcapillary endothelium and PSGL-1 on leukocytes. The attenuated rolling interactions of SHR leukocytes with the endothelium were restored by chronic treatment with a broad-spectrum MMP inhibitor (CGS) for 24 weeks. The SHR MMP levels, in plasma and mesentery, as well as the systolic blood pressure, decreased significantly with treatment. In the SHR mesentery, labeling of P-selectin in the postcapillary venules by immunohistochemistry demonstrated, on average, a 31% lower extracellular P-selectin density compared with the normotensive WKY. A significantly lower extracellular PSGL-1 density on the membranes of SHR neutrophils compared with the WKY also supported our hypothesis. In vivo stimulation of the mesenteric postcapillary venules with histamine demonstrated that the SHR had an attenuated response, as measured by leukocyte rolling velocity on the endothelium. The reduced P-selectin and PSGL-1 density, on SHR postcapillary endothelium and on SHR leukocytes, respectively, was restored significantly by chronic MMP inhibition. The impaired ability of SHR leukocytes to reduce rolling velocity upon inflammatory stimulation led to fewer firmly adhered leukocytes to the endothelium as a contributor to immune suppression.
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Affiliation(s)
- Angela Y Chen
- Department of Bioengineering, Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093-0412, USA.
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27
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Gao X, Wang R, Liang J, Xiang J, Huang J, Wei M, Zeng X. Inhibition of P-selectin-mediated inflammation cell adhesion by 6SCM-chitin. J Taiwan Inst Chem Eng 2012. [DOI: 10.1016/j.jtice.2011.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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28
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Chacko BK, Scott DW, Chandler RT, Patel RP. Endothelial surface N-glycans mediate monocyte adhesion and are targets for anti-inflammatory effects of peroxisome proliferator-activated receptor γ ligands. J Biol Chem 2011; 286:38738-38747. [PMID: 21911496 PMCID: PMC3207389 DOI: 10.1074/jbc.m111.247981] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 08/24/2011] [Indexed: 01/13/2023] Open
Abstract
Endothelial-monocyte interactions are regulated by adhesion molecules and key in the development of vascular inflammatory disease. Peroxisome proliferator-activated receptor (PPAR) γ activation in endothelial cells is recognized to mediate anti-inflammatory effects that inhibit monocyte rolling and adhesion. Herein, evidence is provided for a novel mechanism for the anti-inflammatory effects of PPARγ ligand action that involves inhibition of proinflammatory cytokine-dependent up-regulation of endothelial N-glycans. TNFα treatment of human umbilical vein endothelial cells increased surface expression of high mannose/hybrid N-glycans. A role for these sugars in mediating THP-1 or primary human monocyte rolling and adhesion was indicated by competition studies in which addition of α-methylmannose, but not α-methylglucose, inhibited monocyte rolling and adhesion during flow, but not under static conditions. This result supports the notion that adhesion molecules provide scaffolds for sugar epitopes to mediate adhesion with cognate receptors. A panel of structurally distinct PPARγ agonists all decreased TNFα-dependent expression of endothelial high mannose/hybrid N-glycans. Using rosiglitazone as a model PPARγ agonist, which decreased TNFα-induced high mannose N-glycan expression, we demonstrate a role for these carbohydrate residues in THP-1 rolling and adhesion that is independent of endothelial surface adhesion molecule expression (ICAM-1 and E-selectin). Data from N-glycan processing gene arrays identified α-mannosidases (MAN1A2 and MAN1C1) as targets for down-regulation by TNFα, which was reversed by rosiglitazone, a result consistent with altered high mannose/hybrid N-glycan epitopes. Taken together we propose a novel anti-inflammatory mechanism of endothelial PPARγ activation that involves targeting protein post-translational modification of adhesion molecules, specifically N-glycosylation.
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Affiliation(s)
- Balu K Chacko
- Department of Pathology, University of Alabama, Birmingham, Alabama 35294
| | - David W Scott
- Department of Pathology, University of Alabama, Birmingham, Alabama 35294
| | - Robert T Chandler
- Department of Pathology, University of Alabama, Birmingham, Alabama 35294
| | - Rakesh P Patel
- Department of Pathology, University of Alabama, Birmingham, Alabama 35294.
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29
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Coxsackievirus A24 variant uses sialic acid-containing O-linked glycoconjugates as cellular receptors on human ocular cells. J Virol 2011; 85:11283-90. [PMID: 21880775 DOI: 10.1128/jvi.05597-11] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Coxsackievirus A24 variant (CVA24v) is a main causative agent of acute hemorrhagic conjunctivitis (AHC), which is a highly contagious eye infection. Previously it has been suggested that CVA24v uses sialic acid-containing glycoconjugates as attachment receptors on corneal cells, but the nature of these receptors is poorly described. Here, we set out to characterize and identify the cellular components serving as receptors for CVA24v. Binding and infection experiments using corneal cells treated with deglycosylating enzymes or metabolic inhibitors of de novo glycosylation suggested that the receptor(s) used by CVA24v are constituted by sialylated O-linked glycans that are linked to one or more cell surface proteins but not to lipids. CVA24v bound better to mouse L929 cells overexpressing human P-selectin glycoprotein ligand-1 (PSGL-1) than to mock-transfected cells, suggesting that PSGL-1 is a candidate receptor for CVA24v. Finally, binding competition experiments using a library of mono- and oligosaccharides mimicking known PSGL-1 glycans suggested that CVA24v binds to Neu5Acα2,3Gal disaccharides (Neu5Ac is N-acetylneuraminic acid). These results provide further insights into the early steps of the CVA24v life cycle.
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30
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Vohra Y, Buskas T, Boons GJ. Rapid assembly of oligosaccharides: a highly convergent strategy for the assembly of a glycosylated amino acid derived from PSGL-1. J Org Chem 2010; 74:6064-71. [PMID: 19606831 DOI: 10.1021/jo901135k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
P-Selectin and P-selectin glycoprotein ligand 1 (PSGL-1) are vascular adhesion molecules that play an important role in the recruitment of leukocytes to inflamed tissue by establishing leukocyte-endothelial and leukocyte-platelet interaction. P-Selectin binds to the amino-terminus of PSGL-1 through recognition of a sialyl Lewis(x) (SLe(x)) moiety linked to a properly positioned core-2 O-glycan and three tyrosine sulfate residues. We have developed a highly convergent synthesis of the PSGL-1 oligosaccharide linked to threonine based on the use of trichoroacetimidate donors and thioglycosyl acceptors that give products that can immediately be employed in a subsequent glycosylation step without the need for protecting group manipulations. Furthermore, by employing one-pot multistep glycosylation sequences the number of purification steps could be minimized. The process of oligosaccharide assembly was further streamlined by combining protecting group manipulations and glycosylations as a one-pot multistep synthetic procedure. The resulting PSGL-1 oligosaccharide is properly protected for glycopeptide assembly. It is to be expected that the strategic principles employed for the synthesis of the target compound can be applied for the preparation of other complex oligosaccharides of biological and medical importance.
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Affiliation(s)
- Yusuf Vohra
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, USA
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31
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Krishnamurthy VR, Dougherty A, Kamath M, Song X, Cummings RD, Chaikof EL. Synthesis of an Fmoc-threonine bearing core-2 glycan: a building block for PSGL-1 via Fmoc-assisted solid-phase peptide synthesis. Carbohydr Res 2010; 345:1541-7. [PMID: 20561607 PMCID: PMC2902660 DOI: 10.1016/j.carres.2010.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2010] [Revised: 05/02/2010] [Accepted: 05/06/2010] [Indexed: 01/13/2023]
Abstract
Selectins (L, E, and P) are vascular endothelial molecules that play an important role in the recruitment of leukocytes to inflamed tissue. In this regard, P-Selectin glycoprotein-1 (PSGL-1) has been identified as a ligand for P-Selectin. PSGL-1 binds to P-Selectin through the interaction of core-2 O-glycan expressing sialyl Lewis(x) oligosaccharide and the three tyrosine sulfate residues. Herein, we report the synthesis of threonine-linked core-2 O-glycan as an amino acid building block for the synthesis of PSGL-1. This building block was further incorporated in the Fmoc-assisted solid-phase peptide synthesis to provide a portion of the PSGL-1 glycopeptide.
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Affiliation(s)
- Venkata R Krishnamurthy
- Department of Biomedical Engineering, Emory University/Georgia Institute of Technology, and Department of Surgery, Emory University, Atlanta, GA 30322, USA
| | - Ann Dougherty
- Department of Biomedical Engineering, Emory University/Georgia Institute of Technology, and Department of Surgery, Emory University, Atlanta, GA 30322, USA
| | - Medha Kamath
- Department of Biomedical Engineering, Emory University/Georgia Institute of Technology, and Department of Surgery, Emory University, Atlanta, GA 30322, USA
| | - Xuezheng Song
- Department of Biochemistry, Emory University, Atlanta, GA 30322, USA
| | | | - Elliot. L. Chaikof
- Department of Biomedical Engineering, Emory University/Georgia Institute of Technology, and Department of Surgery, Emory University, Atlanta, GA 30322, USA
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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Lu SX, Holland AM, Na IK, Terwey TH, Alpdogan O, Bautista JL, Smith OM, Suh D, King C, Kochman A, Hubbard VM, Rao UK, Yim N, Liu C, Laga AC, Murphy G, Jenq RR, Zakrzewski JL, Penack O, Dykstra L, Bampoe K, Perez L, Furie B, Furie B, van den Brink MRM. Absence of P-selectin in recipients of allogeneic bone marrow transplantation ameliorates experimental graft-versus-host disease. THE JOURNAL OF IMMUNOLOGY 2010; 185:1912-9. [PMID: 20622117 DOI: 10.4049/jimmunol.0903148] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Alloreactive T cells are crucial for graft-versus-host disease (GVHD) pathophysiology, and modulating their trafficking patterns has been efficacious in ameliorating experimental disease. We report in this paper that P-selectin, a glycoprotein found on resting and inflamed endothelium, is important for donor alloreactive T cells trafficking into GVHD target organs, such as the intestines and skin. Compared with wild-type (WT) recipients of allogeneic bone marrow transplantation, P-selectin(-/-) recipients exhibit decreased GVHD mortality and decreased GVHD of the skin, liver, and small bowels. This was associated with diminished infiltration of alloactivated T cells into the Peyer's patches and small bowels, coupled with increased numbers of donor T cells in the spleen and secondary lymphoid organs (SLOs). Surprisingly, however, donor T cells deficient for P-selectin glycoprotein ligand 1, the most well described P-selectin ligand, mediated GVHD similar to WT T cells and accumulated in SLO and target organs in similar numbers as WT T cells. This suggests that P-selectin may be required for trafficking into inflamed tissues but not SLO and that donor T cells may use multiple P-selectin ligands apart from P-selectin glycoprotein ligand 1 to interact with P-selectin and traffic into inflamed tissues during GVHD. We conclude that targeting P-selectin may be a viable strategy for GVHD prophylaxis or treatment.
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Affiliation(s)
- Sydney X Lu
- Department of Medicine and Immunology, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
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33
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Bianchet MA, Odom EW, Vasta GR, Amzel LM. Structure and specificity of a binary tandem domain F-lectin from striped bass (Morone saxatilis). J Mol Biol 2010; 401:239-52. [PMID: 20561530 DOI: 10.1016/j.jmb.2010.06.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 06/08/2010] [Accepted: 06/09/2010] [Indexed: 01/12/2023]
Abstract
The plasma of the striped bass Morone saxatilis contains a fucose-specific lectin (MsaFBP32) that consists of two F-type carbohydrate recognition domains (CRDs) in tandem. The crystal structure of the complex of MsaFBP32 with l-fucose reported here shows a cylindrical 81-A-long and 60-A-wide trimer divided into two globular halves: one containing N-terminal CRDs (N-CRDs) and the other containing C-terminal CRDs (C-CRDs). The resulting binding surfaces at the opposite ends of the cylindrical trimer have the potential to cross-link cell surface or humoral carbohydrate ligands. The N-CRDs and C-CRDs of MsaFBP32 exhibit significant structural differences, suggesting that they recognize different glycans. Analysis of the carbohydrate binding sites provides the structural basis for the observed specificity of MsaFBP32 for simple carbohydrates and suggests that the N-CRD recognizes more complex fucosylated oligosaccharides and with a relatively higher avidity than the C-CRD. Modeling of MsaFBP32 complexed with fucosylated glycans that are widely distributed in prokaryotes and eukaryotes rationalizes the observation that binary tandem CRD F-type lectins function as opsonins by cross-linking "non-self" carbohydrate ligands and "self" carbohydrate ligands, such as sugar structures displayed by microbial pathogens and glycans on the surface of phagocytic cells from the host.
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Affiliation(s)
- Mario A Bianchet
- Department of Biophysics and Biophysical Chemistry, The Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA.
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34
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Bestebroer J, de Haas CJ, van Strijp JA. How microorganisms avoid phagocyte attraction. FEMS Microbiol Rev 2010; 34:395-414. [DOI: 10.1111/j.1574-6976.2009.00202.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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35
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Pudelko M, Bull J, Kunz H. Chemical and Chemoenzymatic Synthesis of Glycopeptide Selectin Ligands Containing Sialyl Lewis X Structures. Chembiochem 2010; 11:904-30. [DOI: 10.1002/cbic.201000029] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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36
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Barbaux S, Poirier O, Pincet F, Hermand P, Tiret L, Deterre P. The adhesion mediated by the P-selectin P-selectin glycoprotein ligand-1 (PSGL-1) couple is stronger for shorter PSGL-1 variants. J Leukoc Biol 2010; 87:727-34. [DOI: 10.1189/jlb.0609408] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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37
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Xu J, Cai J, Suresh M, Peek SF, Darien BJ. Equine PSGL-1 modifications required for P-selectin binding. Vet Immunol Immunopathol 2009; 131:33-43. [DOI: 10.1016/j.vetimm.2009.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 02/27/2009] [Accepted: 03/06/2009] [Indexed: 01/06/2023]
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38
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Baumann K, Kowalczyk D, Gutjahr T, Pieczyk M, Jones C, Wild M, Vestweber D, Kunz H. Sulfatierte und nicht sulfatierte Glycopeptid-Erkennungsdomänen des P-Selektin-Glycoprotein-Liganden 1 und ihre Bindung an P- und E-Selektin. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805999] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Baumann K, Kowalczyk D, Gutjahr T, Pieczyk M, Jones C, Wild M, Vestweber D, Kunz H. Sulfated and Non-Sulfated Glycopeptide Recognition Domains of P-Selectin Glycoprotein Ligand 1 and their Binding to P- and E-Selectin. Angew Chem Int Ed Engl 2009; 48:3174-8. [DOI: 10.1002/anie.200805999] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Shivers RP, Youngman MJ, Kim DH. Transcriptional responses to pathogens in Caenorhabditis elegans. Curr Opin Microbiol 2008; 11:251-6. [DOI: 10.1016/j.mib.2008.05.014] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 05/21/2008] [Accepted: 05/22/2008] [Indexed: 10/21/2022]
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41
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Baumann K, Kowalczyk D, Kunz H. Totalsynthese der Glycopeptid-Erkennungsregion des P-Selektin- Glycoprotein-Liganden 1. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705762] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Baumann K, Kowalczyk D, Kunz H. Total Synthesis of the Glycopeptide Recognition Domain of the P-Selectin Glycoprotein Ligand 1. Angew Chem Int Ed Engl 2008; 47:3445-9. [DOI: 10.1002/anie.200705762] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Kawar ZS, Johnson TK, Natunen S, Lowe JB, Cummings RD. PSGL-1 from the murine leukocytic cell line WEHI-3 is enriched for core 2-based O-glycans with sialyl Lewis x antigen. Glycobiology 2008; 18:441-6. [PMID: 18310305 DOI: 10.1093/glycob/cwn020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Leukocyte trafficking involves specific recognition between P-selectin and L-selectin and PSGL-1 containing core 2-based O-glycans expressing sialyl Lewis x (SLe(x)) antigen. However, the structural identity of the glycan component(s) displayed by murine neutrophil PSGL-1 that contributes to its P-selectin counter-receptor activity has been uncertain, since these cells express little if any SLe(x) antigen, and because there have been no direct studies to examine murine PSGL-1 glycosylation. To address this uncertainty, we studied PSGL-1 glycosylation in the murine cell line WEHI-3 using metabolic-radiolabeling with (3)H-monosaccharide precursors to detect low-abundance O-glycan structures. We report that PSGL-1 from WEHI-3 cells expresses a di-sialylated core 2 O-glycan containing the SLe(x) antigen. This fucosylated O-glycan is scarce on PSGL-1 and essentially undetectable in total leukocyte glycoproteins from WEHI-3 cells. These results demonstrate that WEHI-3 cells selectively fucosylate PSGL-1 to generate functionally important core 2-based O-glycans containing the SLe(x) antigen.
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Affiliation(s)
- Ziad S Kawar
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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44
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Zhu J, Xue J, Guo Z, Zhang L, Marchant RE. Biomimetic Glycoliposomes as Nanocarriers for Targeting P-Selectin on Activated Platelets. Bioconjug Chem 2007; 18:1366-9. [PMID: 17691854 DOI: 10.1021/bc700212b] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cell glycocalyx is an attractive model for surface modification of liposomes with the objectives of tissue targeting and prolonged circulation time. Here, we reported on glycocalyx-mimicking liposomes, prepared by incorporating a glycolipid of 3'-sulfo-Lewis a (SuLe(a))-PEG-DSPE with a headgroup of SuLe(a) and a spacer of poly(ethylene glycol) (PEG) linked to two hydrophobic tails. This PEG spaced structure is used to mimic the extended structure of P-selectin glycoprotein ligand 1 (PSGL-1) on activated leukocytes, in order to facilitate the specific binding of liposomes to the receptor of P-selectin expressed on activated platelets. Our results indicate that SuLe(a)-PEG-DSPE can form stable, narrowly distributed liposomes with 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) and cholesterol, with a vesicle size of 113.3 nm. The resultant SuLe(a)-PEG-liposomes can facilitate their binding to the receptor of P-selectin 22 times higher than SuLe(a)-liposomes without a PEG spacer. Further studies by fluorescence microscopy show that SuLe(a)-PEG-liposomes can bind to activated platelets in vitro effectively. It suggests that biomimetic SuLe(a)-PEG-liposomes may be used as nanocarriers to target activated platelets for drug delivery to the injury sites of cardiovascular diseases.
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Affiliation(s)
- Junmin Zhu
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, USA
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45
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Borsig L, Wang L, Cavalcante MCM, Cardilo-Reis L, Ferreira PL, Mourão PAS, Esko JD, Pavão MSG. Selectin Blocking Activity of a Fucosylated Chondroitin Sulfate Glycosaminoglycan from Sea Cucumber. J Biol Chem 2007; 282:14984-91. [PMID: 17371880 DOI: 10.1074/jbc.m610560200] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Heparin is an excellent inhibitor of P- and L-selectin binding to the carbohydrate determinant, sialyl Lewis(x). As a consequence of its anti-selectin activity, heparin attenuates metastasis and inflammation. Here we show that fucosylated chondroitin sulfate (FucCS), a polysaccharide isolated from sea cucumber composed of a chondroitin sulfate backbone substituted at the 3-position of the beta-D-glucuronic acid residues with 2,4-disulfated alpha-L-fucopyranosyl branches, is a potent inhibitor of P- and L-selectin binding to immobilized sialyl Lewis(x) and LS180 carcinoma cell attachment to immobilized P- and L-selectins. Inhibition occurs in a concentration-dependent manner. Furthermore, FucCS was 4-8-fold more potent than heparin in the inhibition of the P- and L-selectin-sialyl Lewis(x) interactions. No inhibition of E-selectin was observed. FucCS also inhibited lung colonization by adenocarcinoma MC-38 cells in an experimental metastasis model in mice, as well as neutrophil recruitment in two models of inflammation (thioglycollate-induced peritonitis and lipopolysaccharide-induced lung inflammation). Inhibition occurred at a dose that produces no significant change in plasma activated partial thromboplastin time. Removal of the sulfated fucose branches on the FucCS abolished the inhibitory effect in vitro and in vivo. Overall, the results suggest that invertebrate FucCS may be a potential alternative to heparin for blocking metastasis and inflammatory reactions without the undesirable side effects of anticoagulant heparin.
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Affiliation(s)
- Lubor Borsig
- Zurich Center for Integrative Human Physiology and Institute of Physiology, University of Zurich, CH-8057 Zurich, Switzerland
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46
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Ham ASW, Goetz DJ, Klibanov AL, Lawrence MB. Microparticle adhesive dynamics and rolling mediated by selectin-specific antibodies under flow. Biotechnol Bioeng 2007; 96:596-607. [PMID: 16917925 PMCID: PMC3711028 DOI: 10.1002/bit.21153] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In vitro studies were performed to characterize the relative performance of candidate receptors to target microparticles to inflammatory markers on vascular endothelium. To model the interactions of drug-bearing microparticles or imaging contrast agents with the vasculature, 6 micron polystyrene particles bearing antibodies, peptides, or carbohydrates were perfused over immobilized E- or P-selectin in a flow chamber. Microparticles conjugated with HuEP5C7.g2 (HuEP), a monoclonal antibody (mAb) specific to E- and P-selectin, supported leukocyte-like rolling and transient adhesion at venular shear rates. In contrast, microparticles conjugated with a higher affinity mAb specific for P-selectin (G1) were unable to form bonds at venular flow rates. When both HuEP and G1 were conjugated to the microparticle, HuEP supported binding to P-selectin in flow which allowed G1 to form bonds leading to stable adhesion. While the microparticle attachment and rolling performance was not as stable as that mediated by the natural ligands P-selectin Glycoprotein Ligand-1 or sialyl Lewis(x), HuEP performed significantly better than any previously characterized mAb in terms of mediating microparticle binding under flow conditions. HuEP may be a viable alternative to natural ligands to selectins for targeting particles to inflamed endothelium.
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Affiliation(s)
- Anthony Sang Won Ham
- Department of Biomedical Engineering, University of Virginia, 415 Lane Road, Charlottesville, Virginia 22908; tel: 434-982-4269; fax: 434-982-3870
| | - Douglas J. Goetz
- Department of Chemical and Biomolecular Engineering, Ohio University, Athens, Ohio 45701
| | - Alexander L. Klibanov
- Department of Internal Medicine, University of Virginia, Charlottesville, Virginia 22908
| | - Michael B. Lawrence
- Department of Biomedical Engineering, University of Virginia, 415 Lane Road, Charlottesville, Virginia 22908; tel: 434-982-4269; fax: 434-982-3870
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47
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Kranich R, Busemann AS, Bock D, Schroeter-Maas S, Beyer D, Heinemann B, Meyer M, Schierhorn K, Zahlten R, Wolff G, Aydt EM. Rational Design of Novel, Potent Small Molecule Pan-Selectin Antagonists. J Med Chem 2007; 50:1101-15. [PMID: 17302397 DOI: 10.1021/jm060536g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This report describes the first results of a rational hit-finding strategy to design novel small molecule antiinflammatory drugs targeting selectins, a family of three cellular adhesion molecules. Based on recent progress in understanding of molecular interaction between selectins and their natural ligands as well as progress in clinical development of synthetic antagonists like 1 (bimosiamose, TBC1269), this study was initiated to discover small molecule selectin antagonists with improved pharmacological properties. Considering 1 as template structure, a ligand-based approach followed by focused chemical synthesis has been applied to yield novel synthetic small molecules (MWr < 500) with a trihydroxybenzene motif, bearing neither peptidic nor glycosidic components, with nanomolar in vitro activity. Biological evaluation involves two kinds of in vitro assays, a static molecular binding assay, and a dynamic HL-60 cell attachment assay. As compared to controls, the novel compounds showed improved biological in vitro activity both under static and dynamic conditions.
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Affiliation(s)
- Remo Kranich
- Revotar Biopharmaceuticals AG, Neuendorfstrasse 24a, 16761 Hennigsdorf, Germany
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48
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Xu J, Cai J, Anderson B, Wagner B, Albrecht R, Peek SF, Suresh M, Darien BJ. Cloning and functional characterization of recombinant equine P-selectin. Vet Immunol Immunopathol 2007; 116:115-30. [PMID: 17306378 DOI: 10.1016/j.vetimm.2007.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2006] [Revised: 01/03/2007] [Accepted: 01/08/2007] [Indexed: 11/24/2022]
Abstract
The recent molecular characterization and sequencing of equine P-selectin (ePsel), and its glycoprotein ligand, P-selectin glycoprotein ligand-1 (PSGL-1), have provided the tools for further investigation into their role in leukocyte trafficking. Here, we report the generation of a genetically engineered chimeric protein (ePsel-IgG) in which the equine P-selectin lectin and epithelial growth factor (EGF) domains were covalently linked to the equine IgG1 heavy chain constant region. The soluble ePsel-IgG was observed to bind to equine monocytes by confocal microscopy and flow cytometry. Furthermore, equine monocytes bound to immobilized ePsel-IgG in a time course and dose dependent manner. Not only did ePsel-IgG act as an adhesion molecule, it was also found to activate ERK1/2 kinase and induce IL-8 mRNA expression in equine monocytes. That all of the aforementioned ePsel-IgG-induced cell binding and cell signaling were abolished by the addition of EDTA, suggested that ePsel-IgG chimera mediated events occurred via the P-selectin ligand, PSGL-1. We were able to demonstrate that 78% of equine monocytes cross-reacted with anti-human HECA-452 antibody, which recognizes the sialy-Lewis X (sLex) epitope, a well-known carbohydrate binding site on human PSGL-1. Pre-incubation of equine PBMC with neuraminidase or O-sialoglycoprotein endopeptidase (OSGP) reduced ePsel-IgG monocyte binding to 36% or 60%, respectively. Taken together, these data suggest that there might be two ligand recognition sites on P-selectin, one of which recognizes sLex and another which recognizes P-selectin ligand core protein. The ePsel-IgG chimera can be a useful as a reagent for further studies on the role of equine P-selectin and signal transduction in inflammatory events in horse.
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Affiliation(s)
- Jin Xu
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706-1102, USA
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49
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Bestebroer J, Poppelier MJJG, Ulfman LH, Lenting PJ, Denis CV, van Kessel KPM, van Strijp JAG, de Haas CJC. Staphylococcal superantigen-like 5 binds PSGL-1 and inhibits P-selectin–mediated neutrophil rolling. Blood 2006; 109:2936-43. [PMID: 17132726 DOI: 10.1182/blood-2006-06-015461] [Citation(s) in RCA: 137] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
AbstractStaphylococcus aureus secretes several virulence factors interfering with host-cell functions. Staphylococcal superantigen-like (SSL) proteins are a family of 11 exotoxins with structural homology to superantigens but with generally unknown functions. Recently, we described that chemotaxis inhibitory protein of Staphylococcus aureus (CHIPS31-121), a potent inhibitor of C5a-induced responses, is structurally homologous to the C-terminal domain of SSL5. Here, we identify P-selectin glycoprotein ligand-1 (PSGL-1), involved in the initial rolling of neutrophils along the endothelium, as a target for SSL5. SSL5 specifically bound to Chinese hamster ovary cells stably expressing PSGL-1 (CHO–PSGL-1), which was dependent of sulfation and sialylation. Furthermore, SSL5 bound to PSGL-1/Ig fusion protein immobilized on a biosensor chip. SSL5 affected binding of soluble P-selectin/Fc chimera, the principle ligand of PSGL-1, to CHO–PSGL-1 cells and inhibited adhesion of neutrophils to immobilized P-selectin under static conditions. Under flow conditions SSL5 strongly decreased neutrophil rolling on immobilized P-selectin/Fc and activated human endothelial cells. In conclusion, SSL5 interferes with the interaction between PSGL-1 and P-selectin, suggesting that S aureus uses SSL5 to prevent neutrophil extravasation toward the site of infection. This makes SSL5 a potential lead for the development of new anti-inflammatory compounds for disorders characterized by excessive recruitment of leukocytes.
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Affiliation(s)
- Jovanka Bestebroer
- Experimental Microbiology, University Medical Center Utrecht, The Netherlands.
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50
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Rapoport EM, Pazynina GV, Sablina MA, Crocker PR, Bovin NV. Probing sialic acid binding Ig-like lectins (siglecs) with sulfated oligosaccharides. BIOCHEMISTRY (MOSCOW) 2006; 71:496-504. [PMID: 16732727 DOI: 10.1134/s0006297906050051] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Soluble siglecs-1, -4, -5, -6, -7, -8, -9, and -10 were probed with polyacrylamide glycoconjugates in which: 1) the Neu5Ac residue was substituted by a sulfate group (Su); 2) glycoconjugates contained both Su and Neu5Ac; 3) sialoglycoconjugates contained a tyrosine-O-sulfate residue. It was shown that sulfate derivatives of LacNAc did not bind siglecs-1, -4, -5, -6, -7, -8, -9, and -10; binding of 6'-O-Su-LacNAc to siglec-8 was stronger than binding of 3'SiaLacNAc. The relative affinity of 3'-O-Su-TF binding to siglecs-1, -4, and -8 was similar to that of 3'SiaTF. 3'-O-Su-Le(c) displayed two-fold weaker binding to siglec-1 and siglec-4 than 3'SiaLe(c). The interaction of soluble siglecs with sulfated oligosaccharides containing sialic acid was also studied. It was shown that siglecs-1, -4, -5, -6, -7, -9, and -10 did not interact with these compounds; binding of 6-O-Su-3'SiaLacNAc and 6-O-Su-3'SiaTF to siglec-8 was weaker than that of the corresponding sulfate-free sialoside probes. Siglec-8 displayed affinity to 6'-O-Su-LacNAc and 6'-O-Su-SiaLe(x), and defucosylation of the latter compound led to an increase in the binding. Sialoside probes containing tyrosine-O-sulfate residue did not display increased affinity to siglecs-1 and -5 compared with glycoconjugates containing only sialoside. Cell-bound siglecs-1, -5, -7, and -9 did not interact with 6-O-Su-3'SiaLacNAc, whereas the sulfate-free probe 3'SiaLacNAc demonstrated binding. In contrast, the presence of sulfate in 6-O-Su-6'SiaLacNAc did not affect binding of the sialoside probe to siglecs. 6'-O-Su-SiaLe(x) displayed affinity to cell-bound siglecs-1 and -5; its isomer 6-O-Su-SiaLe(x) bound more strongly to siglecs-1, -5, and -9 than SiaLe(x).
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Affiliation(s)
- E M Rapoport
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
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