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Harris ES, McIntire HJ, Mazur M, Schulz-Hildebrandt H, Leung HM, Tearney GJ, Krick S, Rowe SM, Barnes JW. Reduced Sialylation of Airway Mucin Impairs Mucus Transport by Altering the Biophysical Properties of Mucin. RESEARCH SQUARE 2024:rs.3.rs-4421613. [PMID: 38853971 PMCID: PMC11160914 DOI: 10.21203/rs.3.rs-4421613/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Mucus stasis is a pathologic hallmark of muco-obstructive diseases, including cystic fibrosis (CF). Mucins, the principal component of mucus, are extensively modified with hydroxyl (O)-linked glycans, which are largely terminated by sialic acid. Sialic acid is a negatively charged monosaccharide and contributes to the biochemical/biophysical properties of mucins. Reports suggest that mucin sialylation may be altered in CF; however, the consequences of reduced sialylation on mucus clearance have not been fully determined. Here, we investigated the consequences of reduced sialylation on the charge state and conformation of the most prominent airway mucin, MUC5B, and defined the functional consequences of reduced sialylation on mucociliary transport (MCT). Reduced sialylation contributed to a lower charged MUC5B form and decreased polymer expansion. The inhibition of total mucin sialylation de novo impaired MCT in primary human bronchial epithelial cells and rat airways, and specific α-2,3 sialylation blockade was sufficient to recapitulate these findings. Finally, we show that ST3 beta-galactoside alpha-2,3-sialyltransferase (ST3Gal1) expression is downregulated in CF and partially restored by correcting CFTR via Elexacaftor/Tezacaftor/Ivacaftor treatment. Overall, this study demonstrates the importance of mucin sialylation in mucus clearance and identifies decreased sialylation by ST3Gal1 as a possible therapeutic target in CF and potentially other muco-obstructive diseases.
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Affiliation(s)
- Elex S Harris
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | - Hannah J McIntire
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | - Marina Mazur
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | | | | | | | - Stefanie Krick
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | - Steven M Rowe
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | - Jarrod W Barnes
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
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2
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Kaler L, Engle EM, Iverson E, Boboltz A, Ignacio MA, Rife M, Scull MA, Duncan G. Mucus physically restricts influenza A viral particle access to the epithelium. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.08.14.553271. [PMID: 37645821 PMCID: PMC10462089 DOI: 10.1101/2023.08.14.553271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Prior work suggests influenza A virus (IAV) crosses the airway mucus barrier in a sialic acid-dependent manner through the actions of the viral envelope proteins, hemagglutinin and neuraminidase. However, host and viral factors that influence how efficiently mucus traps IAV remain poorly defined. In this work, we assessed how the physicochemical properties of mucus influence its ability to effectively capture IAV with altered sialic acid preference using fluorescence video microscopy and multiple particle tracking. We found an airway mucus gel layer must be produced with pores on the order of size of the virus to physically constrain IAV. Sialic acid binding by IAV also improves mucus trapping efficiency, but interestingly, sialic acid preferences had little impact on the fraction of IAV particles expected to penetrate the mucus barrier. Together, this work provides new insights on mucus barrier function toward IAV with important implications on innate host defense and interspecies transmission.
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3
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Klarić TS, Gudelj I, Santpere G, Novokmet M, Vučković F, Ma S, Doll HM, Risgaard R, Bathla S, Karger A, Nairn AC, Luria V, Bečeheli I, Sherwood CC, Ely JJ, Hof PR, Sousa AM, Josić D, Lauc G, Sestan N. Human-specific features and developmental dynamics of the brain N-glycome. SCIENCE ADVANCES 2023; 9:eadg2615. [PMID: 38055821 PMCID: PMC10699788 DOI: 10.1126/sciadv.adg2615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 11/07/2023] [Indexed: 12/08/2023]
Abstract
Comparative "omics" studies have revealed unique aspects of human neurobiology, yet an evolutionary perspective of the brain N-glycome is lacking. We performed multiregional characterization of rat, macaque, chimpanzee, and human brain N-glycomes using chromatography and mass spectrometry and then integrated these data with complementary glycotranscriptomic data. We found that, in primates, the brain N-glycome has diverged more rapidly than the underlying transcriptomic framework, providing a means for rapidly generating additional interspecies diversity. Our data suggest that brain N-glycome evolution in hominids has been characterized by an overall increase in complexity coupled with a shift toward increased usage of α(2-6)-linked N-acetylneuraminic acid. Moreover, interspecies differences in the cell type expression pattern of key glycogenes were identified, including some human-specific differences, which may underpin this evolutionary divergence. Last, by comparing the prenatal and adult human brain N-glycomes, we uncovered region-specific neurodevelopmental pathways that lead to distinct spatial N-glycosylation profiles in the mature brain.
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Affiliation(s)
- Thomas S. Klarić
- Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA
- Genos Glycoscience Research Laboratory, Zagreb, Croatia
| | - Ivan Gudelj
- Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA
- Genos Glycoscience Research Laboratory, Zagreb, Croatia
- Department of Biotechnology, University of Rijeka, Rijeka, Croatia
| | - Gabriel Santpere
- Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA
- Hospital del Mar Research Institute, Barcelona, Catalonia, Spain
| | | | | | - Shaojie Ma
- Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA
| | - Hannah M. Doll
- Waisman Center and Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA
- Department of Neuroscience, University of Wisconsin-Madison, Madison, WI, USA
| | - Ryan Risgaard
- Waisman Center and Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA
- Department of Neuroscience, University of Wisconsin-Madison, Madison, WI, USA
| | - Shveta Bathla
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
| | - Amir Karger
- IT Research Computing, Harvard Medical School, Boston, MA, USA
| | - Angus C. Nairn
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
| | - Victor Luria
- Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA
- Division of Genetics and Genomics, Boston Children’s Hospital, Harvard Medical School, Boston, USA
| | | | - Chet C. Sherwood
- Department of Anthropology, The George Washington University, Washington, DC, USA
| | - John J. Ely
- Center for the Advanced Study of Human Paleobiology, The George Washington University, Washington, DC, USA
- MAEBIOS, Alamogordo, NM, USA
| | - Patrick R. Hof
- Nash Family Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - André M. M. Sousa
- Waisman Center and Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA
- Department of Neuroscience, University of Wisconsin-Madison, Madison, WI, USA
| | - Djuro Josić
- Department of Biotechnology, University of Rijeka, Rijeka, Croatia
- Warren Alpert Medical School, Brown University, Providence, RI, USA
| | - Gordan Lauc
- Genos Glycoscience Research Laboratory, Zagreb, Croatia
- University of Zagreb Faculty of Pharmacy and Biochemistry, Zagreb, Croatia
| | - Nenad Sestan
- Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
- Departments of Genetics and Comparative Medicine, Kavli Institute for Neuroscience, Program in Cellular Neuroscience, Neurodegeneration and Repair, and Yale Child Study Center, Yale School of Medicine, New Haven, CT, USA
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4
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Al-Shuhaib MBS, Alam S, Khan SA, Al-Shuhaib JMB, Chen YK, M Alshabrmi F. Hemagglutinin 3 and 8 can be the most efficient influenza subtypes for human host invasion; a comparative in silico approach. J Biomol Struct Dyn 2023:1-19. [PMID: 37965722 DOI: 10.1080/07391102.2023.2280674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 10/28/2023] [Indexed: 11/16/2023]
Abstract
The severity of the influenza virus infection is largely determined by its ability to invade the human host receptor. This critical step is conducted by utilizing hemagglutinin (HA) due to its binding with sialic acid 2,6 (SA). Though 18 subtypes (H1-H18) of HA have been identified, the most efficient one for conducting the host entry has not yet been resolved. This study aims to assess the severity of infections for HA variants by conducting a comparative docking of H1-H18 with the human SA receptor. Eighteen viral 3D structures were retrieved, minimized, and optimized for docking with human SA. In all retrieved structures, five conserved amino acid residues were selected for docking with human SA. Special protein grids were prepared by locating these five residues in the 18 selected subtypes. Results showed that H3 and H8 exerted the highest standard precision and extra precision docking scores, and the highest binding affinities with the human SA, respectively. Phylogenetic analyses confirmed the actual positioning of the selected 3D structures and showed these docked structures belonged to their usual classes due to the extremely close distances found in each docked subtype compared with its corresponding non-docked structures. H8-SA showed slightly better RMSD and SASA values than H3-SA, while H3-SIA showed more favourable radius of gyration scores than H8-SIA in the majority of the simulation period. Due to the highest affinity of binding of H3 and H8 with the human receptor, special caution should be exercised regarding any possible outbreak mediated by these subtypes in human populations. However, it is important to acknowledge a limitation inherent to the computational approach; it may hold relative rather than absolute significance. Further research is needed to deepen our understanding of the intricate interplay between HA variants and the host receptor, taking into account the broader context of viral infection dynamics.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
| | - Sarfaraz Alam
- Tunneling Group Biotechnology Centre, Gliwice, Poland
| | | | | | - Yan-Kun Chen
- School of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China
| | - Fahad M Alshabrmi
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah, Saudi Arabia
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5
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Iseli AN, Pohl MO, Glas I, Gaggioli E, Martínez-Barragán P, David SC, Schaub A, Luo B, Klein LK, Bluvshtein N, Violaki K, Motos G, Hugentobler W, Nenes A, Krieger UK, Peter T, Kohn T, Stertz S. The neuraminidase activity of influenza A virus determines the strain-specific sensitivity to neutralization by respiratory mucus. J Virol 2023; 97:e0127123. [PMID: 37819131 PMCID: PMC10617592 DOI: 10.1128/jvi.01271-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 09/08/2023] [Indexed: 10/13/2023] Open
Abstract
IMPORTANCE The respiratory tract of humans is constantly exposed to potentially harmful agents, such as small particles or pathogens, and thus requires protective measures. Respiratory mucus that lines the airway epithelia plays a major role in the prevention of viral infections by limiting the mobility of viruses, allowing subsequent mucociliary clearance. Understanding the interplay between respiratory mucus and viruses can help elucidate host and virus characteristics that enable the initiation of infection. Here, we tested a panel of primary influenza A viruses of avian or human origin for their sensitivity to mucus derived from primary human airway cultures and found that differences between virus strains can be mapped to viral neuraminidase activity. We also show that binding of influenza A viruses to decoy receptors on highly glycosylated mucus components constitutes the major inhibitory function of mucus against influenza A viruses.
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Affiliation(s)
- Alena N. Iseli
- Institute of Medical Virology, University of Zurich, Zurich, Switzerland
| | - Marie O. Pohl
- Institute of Medical Virology, University of Zurich, Zurich, Switzerland
| | - Irina Glas
- Institute of Medical Virology, University of Zurich, Zurich, Switzerland
| | - Elisabeth Gaggioli
- Institute of Medical Virology, University of Zurich, Zurich, Switzerland
| | | | - Shannon C. David
- Environmental Chemistry Laboratory, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Aline Schaub
- Environmental Chemistry Laboratory, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Beiping Luo
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
| | - Liviana K. Klein
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
| | - Nir Bluvshtein
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
| | - Kalliopi Violaki
- Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Ghislain Motos
- Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Walter Hugentobler
- Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Athanasios Nenes
- Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras, Greece
| | - Ulrich K. Krieger
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
| | - Thomas Peter
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
| | - Tamar Kohn
- Environmental Chemistry Laboratory, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Silke Stertz
- Institute of Medical Virology, University of Zurich, Zurich, Switzerland
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6
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Prescott RA, Pankow AP, de Vries M, Crosse KM, Patel RS, Alu M, Loomis C, Torres V, Koralov S, Ivanova E, Dittmann M, Rosenberg BR. A comparative study of in vitro air-liquid interface culture models of the human airway epithelium evaluating cellular heterogeneity and gene expression at single cell resolution. Respir Res 2023; 24:213. [PMID: 37635251 PMCID: PMC10464153 DOI: 10.1186/s12931-023-02514-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 08/17/2023] [Indexed: 08/29/2023] Open
Abstract
BACKGROUND The airway epithelium is composed of diverse cell types with specialized functions that mediate homeostasis and protect against respiratory pathogens. Human airway epithelial (HAE) cultures at air-liquid interface are a physiologically relevant in vitro model of this heterogeneous tissue and have enabled numerous studies of airway disease. HAE cultures are classically derived from primary epithelial cells, the relatively limited passage capacity of which can limit experimental methods and study designs. BCi-NS1.1, a previously described and widely used basal cell line engineered to express hTERT, exhibits extended passage lifespan while retaining the capacity for differentiation to HAE. However, gene expression and innate immune function in BCi-NS1.1-derived versus primary-derived HAE cultures have not been fully characterized. METHODS BCi-NS1.1-derived HAE cultures (n = 3 independent differentiations) and primary-derived HAE cultures (n = 3 distinct donors) were characterized by immunofluorescence and single cell RNA-Seq (scRNA-Seq). Innate immune functions were evaluated in response to interferon stimulation and to infection with viral and bacterial respiratory pathogens. RESULTS We confirm at high resolution that BCi-NS1.1- and primary-derived HAE cultures are largely similar in morphology, cell type composition, and overall gene expression patterns. While we observed cell-type specific expression differences of several interferon stimulated genes in BCi-NS1.1-derived HAE cultures, we did not observe significant differences in susceptibility to infection with influenza A virus and Staphylococcus aureus. CONCLUSIONS Taken together, our results further support BCi-NS1.1-derived HAE cultures as a valuable tool for the study of airway infectious disease.
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Affiliation(s)
- Rachel A Prescott
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Alec P Pankow
- Department of Microbiology, The Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Maren de Vries
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Keaton M Crosse
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Roosheel S Patel
- Department of Microbiology, The Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Mark Alu
- Department of Pathology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Cynthia Loomis
- Department of Pathology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Victor Torres
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Sergei Koralov
- Department of Pathology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Ellie Ivanova
- Department of Pathology, NYU Grossman School of Medicine, New York, NY, 10016, USA
| | - Meike Dittmann
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, 10016, USA.
| | - Brad R Rosenberg
- Department of Microbiology, The Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
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7
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Yi S, Feng Y, Wang Y, Ma F. Sialylation: fate decision of mammalian sperm development, fertilization, and male fertility†. Biol Reprod 2023; 109:137-155. [PMID: 37379321 DOI: 10.1093/biolre/ioad067] [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: 04/03/2023] [Revised: 06/14/2023] [Accepted: 06/19/2023] [Indexed: 06/30/2023] Open
Abstract
Sperm development, maturation, and successful fertilization within the female reproductive tract are intricate and orderly processes that involve protein translation and post-translational modifications. Among these modifications, sialylation plays a crucial role. Any disruptions occurring throughout the sperm's life cycle can result in male infertility, yet our current understanding of this process remains limited. Conventional semen analysis often fails to diagnose some infertility cases associated with sperm sialylation, emphasizing the need to comprehend and investigate the characteristics of sperm sialylation. This review reanalyzes the significance of sialylation in sperm development and fertilization and evaluates the impact of sialylation damage on male fertility under pathological conditions. Sialylation serves a vital role in the life journey of sperm, providing a negatively charged glycocalyx and enriching the molecular structure of the sperm surface, which is beneficial to sperm reversible recognition and immune interaction. These characteristics are particularly crucial during sperm maturation and fertilization within the female reproductive tract. Moreover, enhancing the understanding of the mechanism underlying sperm sialylation can promote the development of relevant clinical indicators for infertility detection and treatment.
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Affiliation(s)
- Shiqi Yi
- Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P.R. China
- Department of Obstetrics and Gynecology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ying Feng
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Yan Wang
- Department of Obstetrics and Gynecology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Fang Ma
- Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P.R. China
- Department of Obstetrics and Gynecology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China
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8
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Vaill M, Kawanishi K, Varki N, Gagneux P, Varki A. Comparative physiological anthropogeny: exploring molecular underpinnings of distinctly human phenotypes. Physiol Rev 2023; 103:2171-2229. [PMID: 36603157 PMCID: PMC10151058 DOI: 10.1152/physrev.00040.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023] Open
Abstract
Anthropogeny is a classic term encompassing transdisciplinary investigations of the origins of the human species. Comparative anthropogeny is a systematic comparison of humans and other living nonhuman hominids (so-called "great apes"), aiming to identify distinctly human features in health and disease, with the overall goal of explaining human origins. We begin with a historical perspective, briefly describing how the field progressed from the earliest evolutionary insights to the current emphasis on in-depth molecular and genomic investigations of "human-specific" biology and an increased appreciation for cultural impacts on human biology. While many such genetic differences between humans and other hominids have been revealed over the last two decades, this information remains insufficient to explain the most distinctive phenotypic traits distinguishing humans from other living hominids. Here we undertake a complementary approach of "comparative physiological anthropogeny," along the lines of the preclinical medical curriculum, i.e., beginning with anatomy and considering each physiological system and in each case considering genetic and molecular components that are relevant. What is ultimately needed is a systematic comparative approach at all levels from molecular to physiological to sociocultural, building networks of related information, drawing inferences, and generating testable hypotheses. The concluding section will touch on distinctive considerations in the study of human evolution, including the importance of gene-culture interactions.
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Affiliation(s)
- Michael Vaill
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
| | - Kunio Kawanishi
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
- Department of Experimental Pathology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Nissi Varki
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
- Department of Pathology, University of California, San Diego, La Jolla, California
| | - Pascal Gagneux
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
- Department of Pathology, University of California, San Diego, La Jolla, California
| | - Ajit Varki
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
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9
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Prescott RA, Pankow AP, de Vries M, Crosse K, Patel RS, Alu M, Loomis C, Torres V, Koralov S, Ivanova E, Dittmann M, Rosenberg BR. A comparative study of in vitro air-liquid interface culture models of the human airway epithelium evaluating cellular heterogeneity and gene expression at single cell resolution. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.27.530299. [PMID: 36909601 PMCID: PMC10002689 DOI: 10.1101/2023.02.27.530299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
The airway epithelium is composed of diverse cell types with specialized functions that mediate homeostasis and protect against respiratory pathogens. Human airway epithelial cultures at air-liquid interface (HAE) are a physiologically relevant in vitro model of this heterogeneous tissue, enabling numerous studies of airway disease 1â€"7 . HAE cultures are classically derived from primary epithelial cells, the relatively limited passage capacity of which can limit experimental methods and study designs. BCi-NS1.1, a previously described and widely used basal cell line engineered to express hTERT, exhibits extended passage lifespan while retaining capacity for differentiation to HAE 5 . However, gene expression and innate immune function in HAE derived from BCi-NS1.1 versus primary cells have not been fully characterized. Here, combining single cell RNA-Seq (scRNA-Seq), immunohistochemistry, and functional experimentation, we confirm at high resolution that BCi-NS1.1 and primary HAE cultures are largely similar in morphology, cell type composition, and overall transcriptional patterns. While we observed cell-type specific expression differences of several interferon stimulated genes in BCi-NS1.1 HAE cultures, we did not observe significant differences in susceptibility to infection with influenza A virus and Staphylococcus aureus . Taken together, our results further support BCi-NS1.1-derived HAE cultures as a valuable tool for the study of airway infectious disease.
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Affiliation(s)
| | - Alec P. Pankow
- Department of Microbiology, The Icahn School of Medicine at Mount Sinai
| | - Maren de Vries
- Department of Microbiology, NYU Grossman School of Medicine
| | - Keaton Crosse
- Department of Microbiology, NYU Grossman School of Medicine
| | - Roosheel S. Patel
- Department of Microbiology, The Icahn School of Medicine at Mount Sinai
| | - Mark Alu
- Department of Pathology, NYU Grossman School of Medicine
| | - Cynthia Loomis
- Department of Pathology, NYU Grossman School of Medicine
| | - Victor Torres
- Department of Microbiology, NYU Grossman School of Medicine
| | - Sergei Koralov
- Department of Pathology, NYU Grossman School of Medicine
| | - Ellie Ivanova
- Department of Pathology, NYU Grossman School of Medicine
| | - Meike Dittmann
- Department of Microbiology, NYU Grossman School of Medicine
| | - Brad R. Rosenberg
- Department of Microbiology, The Icahn School of Medicine at Mount Sinai
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10
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Klarić TS, Gudelj I, Santpere G, Sousa AMM, Novokmet M, Vučković F, Ma S, Bečeheli I, Sherwood CC, Ely JJ, Hof PR, Josić D, Lauc G, Sestan N. Human-specific features and developmental dynamics of the brain N-glycome. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.11.523525. [PMID: 36711977 PMCID: PMC9882074 DOI: 10.1101/2023.01.11.523525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Comparative "omics" studies have revealed unique aspects of human neurobiology, yet an evolutionary perspective of the brain N-glycome is lacking. Here, we performed multi-regional characterization of rat, macaque, chimpanzee, and human brain N-glycomes using chromatography and mass spectrometry, then integrated these data with complementary glycotranscriptomic data. We found that in primates the brain N-glycome has evolved more rapidly than the underlying transcriptomic framework, providing a mechanism for generating additional diversity. We show that brain N-glycome evolution in hominids has been characterized by an increase in complexity and α(2-6)-linked N-acetylneuraminic acid along with human-specific cell-type expression of key glycogenes. Finally, by comparing the prenatal and adult human brain N-glycome, we identify region-specific neurodevelopmental pathways that lead to distinct spatial N-glycosylation profiles in the mature brain. One-Sentence Summary Evolution of the human brain N-glycome has been marked by an increase in complexity and a shift in sialic acid linkage.
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11
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Modification of Morphology and Glycan Pattern of the Oviductal Epithelium of Baboon Papio hamadryas during the Menstrual Cycle. Animals (Basel) 2022; 12:ani12202769. [PMID: 36290159 PMCID: PMC9597729 DOI: 10.3390/ani12202769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/23/2022] [Accepted: 10/11/2022] [Indexed: 11/12/2022] Open
Abstract
The mammalian oviduct is a highly specialized structure where fertilization and early embryonic development occur. Its mucosal epithelium is involved in maintaining and modulating a dynamic intraluminal fluid. The oviductal epithelium consists of ciliated and non-ciliated (secretory) cells whose differentiation and activity are sex hormone-dependent. In this study, we investigated for the first time both the morphology and the glycan composition of baboon oviductal epithelium during the menstrual cycle. Oviducts were laparoscopically removed from 14 healthy adult female Papio hamadryas whose menstrual cycle phase was assessed based on the sex hormone levels and the vaginal cytology features. Histological investigations were carried out on fimbriae, infundibulum, ampulla, and isthmus separately fixed in 4% (v/v) paraformaldehyde, embedded in paraffin wax, and stained with hematoxylin-eosin for morphological analyses and using a panel of nine fluorescent lectins for glycoconjugate characterization. The histomorphological analysis revealed that in the entire oviduct (i) the ciliated and non-ciliated cells were indistinguishable during the follicular and luteal phases, whereas they were highly differentiated during the preovulatory phase when the non-ciliated cells exhibited apical protrusions, (ii) the epithelium height was significantly higher in the preovulatory phase compared to other menstrual phases, and (iii) the number of ciliated cells significantly (p ≤ 0.05) increased from the fimbriae to the infundibulum and progressively reduced in the other oviductal segments with the lower presence of ciliated cells in the isthmus. The glycan characterization revealed a complex and region-specific composition during the different phases of the menstrual cycle. It can be summarized as follows: (i) high-mannosylated N-linked glycans (Con A reactivity) were present throughout the oviductal epithelium during the entire menstrual cycle and characteristically in the apical protrusions of non-ciliated cells of the ampulla during the preovulatory phase; (ii) sialoglycans with α2,3-linked sialic acids (MAL II binding) were expressed along the entire oviductal surface only during the preovulatory phase, whereas α2,6-linked ones (SNA affinity) were also detected in the surface of the luteal phase, although during the preovulatory phase they were characteristically found in the glycocalyx of the isthmus cilia, and O-linked sialoglycans with sialic acids linked to Galβl,3GalNAc (T antigen) (KsPNA) and terminal N-acetylgalactosamine (Tn antigen) (KsSBA) were found in the entire oviductal surface during all phases of the menstrual cycle; (iii) GalNAc terminating O-linked glycans (HPA staining) were mainly expressed in the entire oviducts of the luteal and preovulatory phases, and characteristically in the apical protrusions of the isthmus non-ciliated cells of the preovulatory phase; and (iv) fucosylated glycans with α1,2-linked fucose (LTA reactivity) occurred in the apical surface of fimbriae during the luteal phase, whereas α1,3/4-linked fucose (UEA I binders) were present in the apical protrusions of the ampulla non-ciliated cells and in the apical surface of isthmus during the preovulatory phase as well as in the isthmus apical surface of follicular-phase oviducts. These results demonstrate for the first time that morphological and glycan changes occur in the baboon oviductal epithelium during the menstrual cycle. Particularly, the sex hormone fluctuation affects the glycan pattern in a region-specific manner, probably related to the function of the oviductal segments. The findings add new data concerning baboons which, due to their anatomical similarity to humans, make an excellent model for female reproduction studies.
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12
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Wong KL, Li Z, Ma F, Wang D, Song N, Chong CH, Luk KK, Leung SO. SM03, an Anti-CD22 Antibody, Converts Cis-to- Trans Ligand Binding of CD22 against α2,6-Linked Sialic Acid Glycans and Immunomodulates Systemic Autoimmune Diseases. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:2726-2737. [PMID: 35688465 DOI: 10.4049/jimmunol.2100820] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 03/08/2022] [Indexed: 06/15/2023]
Abstract
SM03, an anti-CD22 recombinant IgG1 mAb, is currently in a phase III clinical trial for the treatment of rheumatoid arthritis (NCT04312815). SM03 showed good safety and efficacy in phase I systemic lupus erythematosus and phase II moderate to severe rheumatoid arthritis clinical trials. We propose the success of SM03 as a therapeutic to systemic autoimmune diseases is through the utilization of a novel mechanism of action unique to SM03. CD22, an inhibitory coreceptor of the BCR, is a potential immunotherapeutic target against autoimmune diseases. SM03 could disturb the CD22 homomultimeric configuration through disrupting cis binding to α2,6-linked sialic acids, induce rapid internalization of CD22 from the cell surface of human B cells, and facilitate trans binding between CD22 to human autologous cells. This in turn increased the activity of the downstream immunomodulatory molecule Src homology region 2 domain-containing phosphatase 1 (SHP-1) and decreased BCR-induced NF-κB activation in human B cells and B cell proliferation. This mechanism of action gives rationale to support the significant amelioration of disease and good safety profile in clinical trials, as by enabling the "self" recognition mechanism of CD22 via trans binding to α2,6 sialic acid ligands on autologous cells, SM03 specifically restores immune tolerance of B cells to host tissues without affecting the normal B cell immune response to pathogens.
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Affiliation(s)
- Kin L Wong
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
| | - Zhengdong Li
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
| | - Felix Ma
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
| | - Dong Wang
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
| | - Nan Song
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
| | - Chi H Chong
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
| | - Ka K Luk
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
| | - Shui O Leung
- SinoMab BioScience Ltd., Hong Kong Special Administrative Region, China
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13
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Impact of Infectious Disease on Humans and Our Origins. ANTHROPOLOGICAL REVIEW 2022. [DOI: 10.18778/1898-6773.85.1.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
On May 16, 2020, the Center for Academic Research and Training in Anthropogeny organized the symposium “Impact of Infectious Disease on Humans and Our Origins”. The symposium aimed to gather experts on infectious diseases in one place and discuss the interrelationship between different pathogens and humans in an evolutionary context. The talks discussed topics including SARS-CoV-2, dengue and Zika, the notion of human-specific diseases, streptococci, microbiome in the human reproductive tract, Salmonella enterica, malaria, and human immunological memory.
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14
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Ekanger CT, Zhou F, Bohan D, Lotsberg ML, Ramnefjell M, Hoareau L, Røsland GV, Lu N, Aanerud M, Gärtner F, Salminen PR, Bentsen M, Halvorsen T, Ræder H, Akslen LA, Langeland N, Cox R, Maury W, Stuhr LEB, Lorens JB, Engelsen AST. Human Organotypic Airway and Lung Organoid Cells of Bronchiolar and Alveolar Differentiation Are Permissive to Infection by Influenza and SARS-CoV-2 Respiratory Virus. Front Cell Infect Microbiol 2022; 12:841447. [PMID: 35360113 PMCID: PMC8964279 DOI: 10.3389/fcimb.2022.841447] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/10/2022] [Indexed: 12/13/2022] Open
Abstract
The ongoing coronavirus disease 2019 (COVID-19) pandemic has led to the initiation of unprecedented research efforts to understand the pathogenesis mediated by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). More knowledge is needed regarding the cell type-specific cytopathology and its impact on cellular tropism. Furthermore, the impact of novel SARS-CoV-2 mutations on cellular tropism, alternative routes of entry, the impact of co-infections, and virus replication kinetics along the respiratory tract remains to be explored in improved models. Most applied virology models are not well suited to address the remaining questions, as they do not recapitulate the histoarchitecture and cellular composition of human respiratory tissues. The overall aim of this work was to establish from single biopsy specimens, a human adult stem cell-derived organoid model representing the upper respiratory airways and lungs and explore the applicability of this model to study respiratory virus infection. First, we characterized the organoid model with respect to growth pattern and histoarchitecture, cellular composition, and functional characteristics. Next, in situ expression of viral entry receptors, including influenza virus-relevant sialic acids and SARS-CoV-2 entry receptor ACE2 and TMPRSS2, were confirmed in organoids of bronchiolar and alveolar differentiation. We further showed successful infection by pseudotype influenza A H7N1 and H5N1 virus, and the ability of the model to support viral replication of influenza A H7N1 virus. Finally, successful infection and replication of a clinical isolate of SARS-CoV-2 were confirmed in the organoids by TCID50 assay and immunostaining to detect intracellular SARS-CoV-2 specific nucleocapsid and dsRNA. The prominent syncytia formation in organoid tissues following SARS-CoV-2 infection mimics the findings from infected human tissues in situ. We conclude that the human organotypic model described here may be particularly useful for virology studies to evaluate regional differences in the host response to infection. The model contains the various cell types along the respiratory tract, expresses respiratory virus entry factors, and supports successful infection and replication of influenza virus and SARS-CoV-2. Thus, the model may serve as a relevant and reliable tool in virology and aid in pandemic preparedness, and efficient evaluation of antiviral strategies.
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Affiliation(s)
- Camilla Tvedt Ekanger
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
- The Influenza Centre, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Fan Zhou
- The Influenza Centre, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Dana Bohan
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, United States
| | - Maria Lie Lotsberg
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
| | - Maria Ramnefjell
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Laurence Hoareau
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Pediatrics, Haukeland University Hospital, Bergen, Norway
| | - Gro Vatne Røsland
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
| | - Ning Lu
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
| | - Marianne Aanerud
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Thoracic Medicine, Haukeland University Hospital, Bergen, Norway
| | - Fabian Gärtner
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Thoracic Medicine, Haukeland University Hospital, Bergen, Norway
| | - Pirjo Riitta Salminen
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Section of Cardiothoracic Surgery, Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Mariann Bentsen
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Pediatrics, Haukeland University Hospital, Bergen, Norway
| | - Thomas Halvorsen
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Pediatrics, Haukeland University Hospital, Bergen, Norway
| | - Helge Ræder
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Pediatrics, Haukeland University Hospital, Bergen, Norway
| | - Lars A. Akslen
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Nina Langeland
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - Rebecca Cox
- The Influenza Centre, Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Microbiology, Haukeland University Hospital, Bergen, Norway
| | - Wendy Maury
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, United States
| | | | - James B. Lorens
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
| | - Agnete S. T. Engelsen
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
- Centre for Cancer Biomarkers, University of Bergen (CCBIO), Department of Clinical Medicine, Bergen, Norway
- *Correspondence: Agnete S. T. Engelsen,
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15
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Lopez-Gordo E, Orlowski A, Wang A, Weinberg A, Sahoo S, Weber T. Hydroxylation of N-acetylneuraminic Acid Influences the in vivo Tropism of N-linked Sialic Acid-Binding Adeno-Associated Viruses AAV1, AAV5, and AAV6. Front Med (Lausanne) 2021; 8:732095. [PMID: 35036407 PMCID: PMC8757481 DOI: 10.3389/fmed.2021.732095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 11/22/2021] [Indexed: 11/13/2022] Open
Abstract
Adeno-associated virus (AAV) vectors are promising candidates for gene therapy. However, a number of recent preclinical large animal studies failed to translate into the clinic. This illustrates the formidable challenge of choosing the animal models that promise the best chance of a successful translation into the clinic. Several of the most common AAV serotypes use sialic acid (SIA) as their primary receptor. However, in contrast to most mammals, humans lack the enzyme CMAH, which hydroxylates cytidine monophosphate-N-acetylneuraminic acid (CMP-Neu5Ac) into cytidine monophosphate-N-glycolylneuraminic acid (CMP-Neu5Gc). As a result, human glycans only contain Neu5Ac and not Neu5Gc. Here, we investigate the tropism of AAV1, 5, 6 and 9 in wild-type C57BL/6J (WT) and CMAH knock-out (CMAH−/−) mice. All N-linked SIA-binding serotypes (AAV1, 5 and 6) showed significantly lower transduction of the heart in CMAH−/− when compared to WT mice (5–5.8-fold) and, strikingly, skeletal muscle transduction by AAV5 was almost 30-fold higher in CMAH−/− compared to WT mice. Importantly, the AAV tropism or distribution of expression among different organs was also affected. For AAV1, AAV5 and AAV6, expression in the heart compared to the liver was 4.6–8-fold higher in WT than in CMAH−/− mice, and for AAV5 the expression in the heart compared to the skeletal muscle was 57.3-fold higher in WT than in CMAH−/− mice. These data thus strongly suggest that the relative abundance of Neu5Ac and Neu5Gc plays a role in AAV tropism, and that results obtained in commonly used animal models might not translate into the clinic.
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Affiliation(s)
- Estrella Lopez-Gordo
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
| | - Alejandro Orlowski
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
| | - Arthur Wang
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
| | - Alan Weinberg
- Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
| | - Susmita Sahoo
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
| | - Thomas Weber
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
- *Correspondence: Thomas Weber
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16
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Cho BG, Gautam S, Peng W, Huang Y, Goli M, Mechref Y. Direct Comparison of N-Glycans and Their Isomers Derived from Spike Glycoprotein 1 of MERS-CoV, SARS-CoV-1, and SARS-CoV-2. J Proteome Res 2021; 20:4357-4365. [PMID: 34369795 PMCID: PMC8370124 DOI: 10.1021/acs.jproteome.1c00323] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Indexed: 12/16/2022]
Abstract
The emergence of COVID-19 pandemic has engaged the scientific community around the globe in the rapid development of effective therapeutics and vaccines. Owing to its crucial role in the invasion of the host cell, spike (S) glycoprotein is one of the major targets in these studies. The S1 subunit of the S protein (S1 protein) accommodates the receptor-binding domain, which enables the initial binding of the virus to the host cell. Being a heavily glycosylated protein, numerous studies have investigated its glycan composition. However, none of the studies have explored the isomeric glycan distribution of this protein. Furthermore, this isomeric glycan distribution has never been compared to that in S1 proteins of other coronaviruses, severe acute respiratory syndrome coronavirus 1 and Middle East respiratory syndrome coronavirus, which were responsible for past epidemics. This study explores the uncharted territory of the isomeric glycan distribution in the coronaviruses' S1 protein using liquid chromatography coupled to tandem mass spectrometry. We believe that our data would facilitate future investigations to study the role of isomeric glycans in coronavirus viral pathogenesis.
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Affiliation(s)
- Byeong Gwan Cho
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061
| | - Sakshi Gautam
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061
| | - Wenjing Peng
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061
| | - Yifan Huang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061
| | - Mona Goli
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061
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17
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The Mean of Milk: A Review of Human Milk Oligosaccharide Concentrations throughout Lactation. Nutrients 2021; 13:nu13082737. [PMID: 34444897 PMCID: PMC8398195 DOI: 10.3390/nu13082737] [Citation(s) in RCA: 99] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/14/2021] [Accepted: 07/22/2021] [Indexed: 12/13/2022] Open
Abstract
Human milk oligosaccharides (HMOs) are non-digestible and structurally diverse complex carbohydrates that are highly abundant in human milk. To date, more than 200 different HMO structures have been identified. Their concentrations in human milk vary according to various factors such as lactation period, mother’s genetic secretor status, and length of gestation (term or preterm). The objective of this review is to assess and rank HMO concentrations from healthy mothers throughout lactation at a global level. To this aim, published data from pooled (secretor and non-secretor) human milk samples were used. When samples were reported as secretor or non-secretor, means were converted to a pooled level, using the reported mean of approximately 80/20% secretor/non-secretor frequency in the global population. This approach provides an estimate of HMO concentrations in the milk of an average, healthy mother independent of secretor status. Mean concentrations of HMOs were extracted and categorized by pre-defined lactation periods of colostrum (0–5 days), transitional milk (6–14 days), mature milk (15–90 days), and late milk (>90 days). Further categorizations were made by gestational length at birth, mother’s ethnicity, and analytical methodology. Data were excluded if they were from preterm milk, unknown sample size and mothers with any known disease status. A total of 57 peer-reviewed articles reporting individual HMO concentrations published between 1996 and 2020 were included in the review. Pooled HMO means reported from 31 countries were analyzed. In addition to individual HMO concentrations, 12 articles reporting total HMO concentrations were also analyzed as a basis for relative HMO abundance. Total HMOs were found as 17.7 g/L in colostrum, 13.3 g/L in transitional milk, and 11.3 g/L in mature milk. The results show that HMO concentrations differ largely for each individual HMO and vary with lactation stages. For instance, while 2′-FL significantly decreased from colostrum (3.18 g/L ± 0.9) to late milk (1.64 g/L ± 0.67), 3-FL showed a significant increase from colostrum (0.37 g/L ± 0.1) to late milk (0.92 g/L ± 0.5). Although pooled human milk contains a diverse HMO profile with more than 200 structures identified, the top 10 individual HMOs make up over 70% of total HMO concentration. In mature pooled human milk, the top 15 HMOs in decreasing order of magnitude are 2′-FL, LNDFH-I (DFLNT), LNFP-I, LNFP-II, LNT, 3-FL, 6′-SL, DSLNT, LNnT, DFL (LDFT), FDS-LNH, LNFP-III, 3′-SL, LST c, and TF-LNH.
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18
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Khan N, de Manuel M, Peyregne S, Do R, Prufer K, Marques-Bonet T, Varki N, Gagneux P, Varki A. Multiple Genomic Events Altering Hominin SIGLEC Biology and Innate Immunity Predated the Common Ancestor of Humans and Archaic Hominins. Genome Biol Evol 2021; 12:1040-1050. [PMID: 32556248 PMCID: PMC7379906 DOI: 10.1093/gbe/evaa125] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2020] [Indexed: 12/11/2022] Open
Abstract
Human-specific pseudogenization of the CMAH gene eliminated the mammalian sialic acid (Sia) Neu5Gc (generating an excess of its precursor Neu5Ac), thus changing ubiquitous cell surface “self-associated molecular patterns” that modulate innate immunity via engagement of CD33-related-Siglec receptors. The Alu-fusion-mediated loss-of-function of CMAH fixed ∼2–3 Ma, possibly contributing to the origins of the genus Homo. The mutation likely altered human self-associated molecular patterns, triggering multiple events, including emergence of human-adapted pathogens with strong preference for Neu5Ac recognition and/or presenting Neu5Ac-containing molecular mimics of human glycans, which can suppress immune responses via CD33-related-Siglec engagement. Human-specific alterations reported in some gene-encoding Sia-sensing proteins suggested a “hotspot” in hominin evolution. The availability of more hominid genomes including those of two extinct hominins now allows full reanalysis and evolutionary timing. Functional changes occur in 8/13 members of the human genomic cluster encoding CD33-related Siglecs, all predating the human common ancestor. Comparisons with great ape genomes indicate that these changes are unique to hominins. We found no evidence for strong selection after the Human–Neanderthal/Denisovan common ancestor, and these extinct hominin genomes include almost all major changes found in humans, indicating that these changes in hominin sialobiology predate the Neanderthal–human divergence ∼0.6 Ma. Multiple changes in this genomic cluster may also explain human-specific expression of CD33rSiglecs in unexpected locations such as amnion, placental trophoblast, pancreatic islets, ovarian fibroblasts, microglia, Natural Killer(NK) cells, and epithelia. Taken together, our data suggest that innate immune interactions with pathogens markedly altered hominin Siglec biology between 0.6 and 2 Ma, potentially affecting human evolution.
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Affiliation(s)
- Naazneen Khan
- Glycobiology Research and Training Center, Department of Medicine, University of California San Diego.,Center for Academic Research and Training in Anthropogeny (CARTA),University of California San Diego
| | - Marc de Manuel
- Institute of Evolutionary Biology (UPF-CSIC), PRBB, Barcelona, Spain
| | - Stephane Peyregne
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Raymond Do
- Glycobiology Research and Training Center, Department of Medicine, University of California San Diego.,Center for Academic Research and Training in Anthropogeny (CARTA),University of California San Diego
| | - Kay Prufer
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Tomas Marques-Bonet
- Institute of Evolutionary Biology (UPF-CSIC), PRBB, Barcelona, Spain.,Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Spain.,CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.,Institut Català de Paleontologia Miquel Crusafont, Universitat Autònoma de Barcelona, Edifici ICTA-ICP, Barcelona, Spain
| | - Nissi Varki
- Glycobiology Research and Training Center, Department of Medicine, University of California San Diego.,Center for Academic Research and Training in Anthropogeny (CARTA),University of California San Diego
| | - Pascal Gagneux
- Glycobiology Research and Training Center, Department of Medicine, University of California San Diego.,Center for Academic Research and Training in Anthropogeny (CARTA),University of California San Diego
| | - Ajit Varki
- Glycobiology Research and Training Center, Department of Medicine, University of California San Diego.,Center for Academic Research and Training in Anthropogeny (CARTA),University of California San Diego
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19
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Jiang X, Tan M, Xia M, Huang P, Kennedy MA. Intra-species sialic acid polymorphism in humans: a common niche for influenza and coronavirus pandemics? Emerg Microbes Infect 2021; 10:1191-1199. [PMID: 34049471 PMCID: PMC8208123 DOI: 10.1080/22221751.2021.1935329] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The ongoing COVID-19 pandemic has led to more than 159 million confirmed cases with over 3.3 million deaths worldwide, but it remains mystery why most infected individuals (∼98%) were asymptomatic or only experienced mild illness. The same mystery applies to the deadly 1918 H1N1 influenza pandemic, which has puzzled the field for a century. Here we discuss dual potential properties of the 1918 H1N1 pandemic viruses that led to the high fatality rate in the small portion of severe cases, while about 98% infected persons in the United States were self-limited with mild symptoms, or even asymptomatic. These variations now have been postulated to be impacted by polymorphisms of the sialic acid receptors in the general population. Since coronaviruses (CoVs) also recognize sialic acid receptors and cause severe acute respiratory syndrome epidemics and pandemics, similar principles of influenza virus evolution and pandemicity may also apply to CoVs. A potential common principle of pathogen/host co-evolution of influenza and CoVs under selection of host sialic acids in parallel with different epidemic and pandemic influenza and coronaviruses is discussed.
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Affiliation(s)
- Xi Jiang
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Ming Tan
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Ming Xia
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Pengwei Huang
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Michael A Kennedy
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, USA
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20
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Pourrajab F. Targeting the glycans: A paradigm for host-targeted and COVID-19 drug design. J Cell Mol Med 2021; 25:5842-5856. [PMID: 34028178 PMCID: PMC8242448 DOI: 10.1111/jcmm.16585] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/12/2021] [Accepted: 04/19/2021] [Indexed: 12/28/2022] Open
Abstract
There is always a need for new approaches for the control of virus burdens caused by seasonal outbreaks, the emergence of novel viruses with pandemic potential and the development of resistance to current antiviral drugs. The outbreak of the 2019 novel coronavirus-disease COVID-19 represented a pandemic threat and declared a public health emergency of international concern. Herein, the role of glycans for the development of new drugs or vaccines, as a host-targeted approach, is discussed where may provide a front-line prophylactic or threats to protect against the current and any future respiratory-infecting virus and possibly against other respiratory pathogens. As a prototype, the role of glycans in the coronavirus infection, as well as, galectins (Gal) as the glycan-recognition agents (GRAs) in drug design are here summarized. Galectins, in particular, Gal-1 and Gal-3 are ubiquitous and important to biological systems, whose interactions with viral glycans modulate host immunity and homeostatic balance.
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Affiliation(s)
- Fatemeh Pourrajab
- Reproductive Immunology Research CenterShahid Sadoughi University of Medical SciencesYazdIran
- Nutrition and Food Security Research CenterShahid Sadoughi University of Medical SciencesYazdIran
- Biotechnology Research Center, International CampusShahid Sadoughi University of Medical SciencesYazdIran
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21
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Chua KH, Mohamed IN, Mohd Yunus MH, Shafinaz Md Nor N, Kamil K, Ugusman A, Kumar J. The Anti-Viral and Anti-Inflammatory Properties of Edible Bird's Nest in Influenza and Coronavirus Infections: From Pre-Clinical to Potential Clinical Application. Front Pharmacol 2021; 12:633292. [PMID: 34025406 PMCID: PMC8138174 DOI: 10.3389/fphar.2021.633292] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 04/26/2021] [Indexed: 12/23/2022] Open
Abstract
Edible bird's nest (BN) is a Chinese traditional medicine with innumerable health benefits, including anti-viral, anti-inflammatory, neuroprotective, and immunomodulatory effects. A small number of studies have reported the anti-viral effects of EBN against influenza infections using in vitro and in vivo models, highlighting the importance of sialic acid and thymol derivatives in their therapeutic effects. At present, studies have reported that EBN suppresses the replicated virus from exiting the host cells, reduces the viral replication, endosomal trafficking of the virus, intracellular viral autophagy process, secretion of pro-inflammatory cytokines, reorient the actin cytoskeleton of the infected cells, and increase the lysosomal degradation of viral materials. In other models of disease, EBN attenuates oxidative stress-induced cellular apoptosis, enhances proliferation and activation of B-cells and their antibody secretion. Given the sum of its therapeutic actions, EBN appears to be a candidate that is worth further exploring for its protective effects against diseases transmitted through air droplets. At present, anti-viral drugs are employed as the first-line defense against respiratory viral infections, unless vaccines are available for the specific pathogens. In patients with severe symptoms due to exacerbated cytokine secretion, anti-inflammatory agents are applied. Treatment efficacy varies across the patients, and in times of a pandemic like COVID-19, many of the drugs are still at the experimental stage. In this review, we present a comprehensive overview of anti-viral and anti-inflammatory effects of EBN, chemical constituents from various EBN preparation techniques, and drugs currently used to treat influenza and novel coronavirus infections. We also aim to review the pathogenesis of influenza A and coronavirus, and the potential of EBN in their clinical application. We also describe the current literature in human consumption of EBN, known allergenic or contaminant presence, and the focus of future direction on how these can be addressed to further improve EBN for potential clinical application.
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Affiliation(s)
- Kien Hui Chua
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
| | - Isa Naina Mohamed
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
| | - Mohd Heikal Mohd Yunus
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
| | - Norefrina Shafinaz Md Nor
- Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Khidhir Kamil
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
| | - Azizah Ugusman
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
| | - Jaya Kumar
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
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22
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Spruit CM, Nemanichvili N, Okamatsu M, Takematsu H, Boons GJ, de Vries RP. N-Glycolylneuraminic Acid in Animal Models for Human Influenza A Virus. Viruses 2021; 13:815. [PMID: 34062844 PMCID: PMC8147317 DOI: 10.3390/v13050815] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/26/2021] [Accepted: 04/28/2021] [Indexed: 12/14/2022] Open
Abstract
The first step in influenza virus infection is the binding of hemagglutinin to sialic acid-containing glycans present on the cell surface. Over 50 different sialic acid modifications are known, of which N-acetylneuraminic acid (Neu5Ac) and N-glycolylneuraminic acid (Neu5Gc) are the two main species. Animal models with α2,6 linked Neu5Ac in the upper respiratory tract, similar to humans, are preferred to enable and mimic infection with unadapted human influenza A viruses. Animal models that are currently most often used to study human influenza are mice and ferrets. Additionally, guinea pigs, cotton rats, Syrian hamsters, tree shrews, domestic swine, and non-human primates (macaques and marmosets) are discussed. The presence of NeuGc and the distribution of sialic acid linkages in the most commonly used models is summarized and experimentally determined. We also evaluated the role of Neu5Gc in infection using Neu5Gc binding viruses and cytidine monophosphate-N-acetylneuraminic acid hydroxylase (CMAH)-/- knockout mice, which lack Neu5Gc and concluded that Neu5Gc is unlikely to be a decoy receptor. This article provides a base for choosing an appropriate animal model. Although mice are one of the most favored models, they are hardly naturally susceptible to infection with human influenza viruses, possibly because they express mainly α2,3 linked sialic acids with both Neu5Ac and Neu5Gc modifications. We suggest using ferrets, which resemble humans closely in the sialic acid content, both in the linkages and the lack of Neu5Gc, lung organization, susceptibility, and disease pathogenesis.
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Affiliation(s)
- Cindy M. Spruit
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands; (C.M.S.); (G.-J.B.)
| | - Nikoloz Nemanichvili
- Division of Pathology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, The Netherlands;
| | - Masatoshi Okamatsu
- Laboratory of Microbiology, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Hokkaido, Japan;
| | - Hiromu Takematsu
- Department of Molecular Cell Biology, Faculty of Medical Technology, Graduate School of Health Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake 470-1192, Aichi, Japan;
| | - Geert-Jan Boons
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands; (C.M.S.); (G.-J.B.)
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
| | - Robert P. de Vries
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands; (C.M.S.); (G.-J.B.)
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23
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Overeem NJ, van der Vries E, Huskens J. A Dynamic, Supramolecular View on the Multivalent Interaction between Influenza Virus and Host Cell. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2007214. [PMID: 33682339 DOI: 10.1002/smll.202007214] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/11/2021] [Indexed: 06/12/2023]
Abstract
Understanding how influenza viruses traverse the mucus and recognize host cells is critical for evaluating their zoonotic potential, and for prevention and treatment of the disease. The surface of the influenza A virus is covered with the receptor-binding protein hemagglutinin and the receptor-cleaving enzyme neuraminidase, which jointly control the interactions between the virus and the host cell. These proteins are organized in closely spaced trimers and tetramers to facilitate multivalent interactions with sialic acid-terminated glycans. This review shows that the individually weak multivalent interactions of influenza viruses allow superselective binding, virus-induced recruitment of receptors, and the formation of dynamic complexes that facilitate molecular walking. Techniques to measure the avidity and receptor specificity of influenza viruses are reviewed, and the pivotal role of multivalent interactions with their emergent properties in crossing the mucus and entering host cells is discussed. A model is proposed for the initiation of cell entry through virus-induced receptor clustering. The multivalent interactions of influenza viruses are maintained in a dynamic regime by a functional balance between binding and cleaving.
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Affiliation(s)
- Nico J Overeem
- Department of Molecules and Materials, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, University of Twente, P.O. Box 217, Enschede, 7500 AE, The Netherlands
| | - Erhard van der Vries
- Royal GD, Arnsbergstraat 7, Deventer, 7418 EZ, The Netherlands
- Department of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht University, Utrecht, 3584CX, The Netherlands
| | - Jurriaan Huskens
- Department of Molecules and Materials, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, University of Twente, P.O. Box 217, Enschede, 7500 AE, The Netherlands
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24
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Day CJ, Röltgen K, Pluschke G, Jennings MP. The cell surface protein MUL_3720 confers binding of the skin pathogen Mycobacterium ulcerans to sulfated glycans and keratin. PLoS Negl Trop Dis 2021; 15:e0009136. [PMID: 33630844 PMCID: PMC7906334 DOI: 10.1371/journal.pntd.0009136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/13/2021] [Indexed: 11/19/2022] Open
Abstract
Mycobacterium ulcerans is the causative agent of the chronic, necrotizing skin disease Buruli ulcer. Modes of transmission and molecular mechanisms involved in the establishment of M. ulcerans infections are poorly understood. Interactions with host glycans are often crucial in bacterial pathogenesis and the 22 kDa M. ulcerans protein MUL_3720 has a putative role in host cell attachment. It has a predicted N-terminal lectin domain and a C-terminal peptidoglycan-binding domain and is highly expressed on the surface of the bacilli. Here we report the glycan-binding repertoire of whole, fixed M. ulcerans bacteria and of purified, recombinant MUL_3720. On an array comprising 368 diverse biologically relevant glycan structures, M. ulcerans cells showed binding to 64 glycan structures, representing several distinct classes of glycans, including sulfated structures. MUL_3720 bound only to glycans containing sulfated galactose and GalNAc, such as glycans known to be associated with keratins isolated from human skin. Surface plasmon resonance studies demonstrated that both whole, fixed M. ulcerans cells and MUL_3720 show high affinity interactions with both glycans and human skin keratin extracts. This MUL_3720-mediated interaction with glycans associated with human skin keratin may contribute to the pathobiology of Buruli ulcer. Mycobacterium ulcerans causes a skin-based disease known as Buruli ulcer. How the bacteria are transmitted and what mechanisms they use to establish the infection of the skin is poorly understood. The only well characterized bacterial factor in Buruli ulcer pathogenesis is mycolactone, a toxin produced by the bacteria. Mycolactone causes apoptosis in human cells, leading to destruction of the skin around extracellular clusters of the mycobacteria. Human cells, like cells of all orders of life, are coated in complex sugar structures and these glycans are one of the major targets of bacteria and viruses for the interaction with host cells. Here we describe the glycan binding of whole Mycobacterium ulcerans cells and a mycobacterial protein, MUL_3720, thought to be involved in glycan binding. We show that both the bacterial cells and MUL_3720 bind to glycans known to be associated with human skin keratin and to skin keratin extracts. This binding of keratin extracts may explain initial bacterial attachment and clustering of the bacteria in the skin, ultimately leading to tissue destruction and ulceration caused by a cloud of secreted mycolactone at the site of infection.
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Affiliation(s)
- Christopher J. Day
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
| | - Katharina Röltgen
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Gerd Pluschke
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
- * E-mail: (GP); (MPJ)
| | - Michael P. Jennings
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
- * E-mail: (GP); (MPJ)
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25
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Fan R, Han X, Gong Y, He L, Xue Z, Yang Y, Sun L, Fan D, You Y, Meng F, Yan X, Zhang M, Zhang J. Alterations of Fucosyltransferase Genes and Fucosylated Glycans in Gastric Epithelial Cells Infected with Helicobacter pylori. Pathogens 2021; 10:pathogens10020168. [PMID: 33557187 PMCID: PMC7913934 DOI: 10.3390/pathogens10020168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 01/31/2021] [Accepted: 02/01/2021] [Indexed: 12/20/2022] Open
Abstract
Helicobacter pylori (H. pylori) adhesion to human gastric epithelial cells is closely linked with fucosylated glycans. Therefore, investigation of fucosylation in the interaction of gastric epithelial cells with H. pylori is critical. In this study we used lectin microarrays to detect the expression of fucosylated glycans in gastric epithelial cells (GES-1) infected with H. pylori strains isolated from patients with different diseases including chronic gastritis, duodenal ulcers, and gastric cancer (each containing two strains) at 4 h. In addition, we investigated the time-course expression of fucosyltransferase (FUT) 1–6 genes in GES-1 cells stimulated with H. pylori strains at 0.5–8 h. At 4 h post-infection, Lotus, AAA, BC2LCN, PA-IIL, CNL and ACG lectins had increased signals in H. pylori-infected GES-1 cells compared to uninfected cells. Higher expression of FUT1 and FUT2 was detected in all H. pylori-infected GES-1 cells within 2 h, regardless of the H. pylori strain. In particular, the expression of FUT2 was higher in H. pylori-infected GES-1 cells with a higher fold change in levels of BC2LCN lectin specific to α1-2 linked fucose (Fuc) at 4 h. The results suggest that the high levels of α1, 2-linked Fuc synthesized by FUT1/2, might play a role in the preliminary stage of H. pylori infection. This provides us with pivotal information to understand the adhesion of H. pylori to human gastric epithelial cells.
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26
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B Cell Aberrance in Lupus: the Ringleader and the Solution. Clin Rev Allergy Immunol 2021; 62:301-323. [PMID: 33534064 DOI: 10.1007/s12016-020-08820-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2020] [Indexed: 12/18/2022]
Abstract
Systemic lupus erythematosus (SLE) is a prototypical autoimmune disease with high heterogeneity but the common characterization of numerous autoantibodies and systemic inflammation which lead to the damage of multiple organs. Aberrance of B cells plays a pivotal role in the immunopathogenesis of SLE via both antibody-dependent and antibody-independent manners. Escape of autoreactive B cells from the central and peripheral tolerance checkpoints, over-activation of B cells and their excessive cytokines release which drive T cells and dendritic cells stimulation, and dysregulated surface molecules, as well as intracellular signal pathways involved in B cell biology, are all contributing to B cell aberrance and participating in the pathogenesis of SLE. Based on that rationale, targeting aberrance of B cells and relevant molecules and pathways is expected to be a promising strategy for lupus control. Multiple approaches targeting B cells through different mechanisms have been attempted, including B-cell depletion via monoclonal antibodies against B-cell-specific molecules, blockade of B-cell survival and activation factors, suppressing T-B crosstalk by interrupting costimulatory molecules and inhibiting intracellular activation signaling cascade by targeting pathway molecules in B cells. Though most attempts ended in failure, the efficacy of B-cell targeting has been encouraged by the FDA approval of belimumab that blocks B cell-activating factor (BAFF) and the recommended use of anti-CD20 as a remedial therapy in refractory lupus. Still, quantities of clinical trials targeting B cells or relevant molecules are ongoing and some of them have displayed promising preliminary results. Additionally, advances in multi-omics studies help deepen our understandings of B cell biology in lupus and may promote the discovery of novel potential therapeutic targets. The combination of real-world data with basic research achievements may pave the road to conquering lupus.
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27
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Dias JA, Ulloa-Aguirre A. New Human Follitropin Preparations: How Glycan Structural Differences May Affect Biochemical and Biological Function and Clinical Effect. Front Endocrinol (Lausanne) 2021; 12:636038. [PMID: 33815292 PMCID: PMC8018285 DOI: 10.3389/fendo.2021.636038] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 02/09/2021] [Indexed: 12/21/2022] Open
Abstract
It is well accepted that pituitary follitropin is secreted into the circulation as a mixture of variants, which differ not in primary structure but rather at the level of glycosylation. These glycosidic forms vary in the number of glycosylation sites filled, complexity of glycosidic chains, and sialylation and sulfation. It is generally agreed that high sialylation, 2,3 sialic acid capping of terminal N-acetyl galactosamine or galactose leads to longer circulating half-life, by blocking binding of asialoglycoprotein receptor (ASGPR) in the liver. In contrast, 2,6 sialic acid found in humans does not prevent recognition of galactose and N-acetyl galactosamine by ASGPR. Few studies on clinical outcomes comparing differences in sialylation of follitropin found in commercially available preparations are available. Thus, there is a clear need for a consortium of open data to address this unmet need. Recently, FSH glycosylation, primarily on the β-subunit, which varies as women age, has emerged as a key modifier of follitropin action, with profound biological effects in vivo in animal models. To date, limited information of recombinant follitropin hormone preparations is available. Thus, most of the studies with FSH that is well characterized biochemically have been done in vitro, with engineered non gonadal host cells bearing recombinant receptors or in animal models. Since limited studies in human granulosa cells are available, a question is whether structural differences in glycosylation in commercially available follitropin affects biological function and clinical effect in humans. The presence of fucose, for example, has not been studied greatly even though, in the case of antibody therapy it has been shown to have a large effect on antibody targeting. This review on glycosidic variability of follitropin from the biochemical/structural point of view reflects on this question and presents an assessment in the context of available published data. If clinical differences are to be expected or not, the readers will have a better understanding of the evidence for and limitations of such expectations.
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Affiliation(s)
- James A. Dias
- Department of Biomedical Sciences, State University of New York at Albany, Albany, NY, United States
- *Correspondence: James A. Dias,
| | - Alfredo Ulloa-Aguirre
- Red de Apoyo a la Investigación, National University of Mexico-Instituto Nacional de Ciencias Médicas y Nutrición SZ., Mexico City, Mexico
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28
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Iverson E, Kaler L, Agostino EL, Song D, Duncan GA, Scull MA. Leveraging 3D Model Systems to Understand Viral Interactions with the Respiratory Mucosa. Viruses 2020; 12:E1425. [PMID: 33322395 PMCID: PMC7763686 DOI: 10.3390/v12121425] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/27/2020] [Accepted: 12/02/2020] [Indexed: 02/07/2023] Open
Abstract
Respiratory viruses remain a significant cause of morbidity and mortality in the human population, underscoring the importance of ongoing basic research into virus-host interactions. However, many critical aspects of infection are difficult, if not impossible, to probe using standard cell lines, 2D culture formats, or even animal models. In vitro systems such as airway epithelial cultures at air-liquid interface, organoids, or 'on-chip' technologies allow interrogation in human cells and recapitulate emergent properties of the airway epithelium-the primary target for respiratory virus infection. While some of these models have been used for over thirty years, ongoing advancements in both culture techniques and analytical tools continue to provide new opportunities to investigate airway epithelial biology and viral infection phenotypes in both normal and diseased host backgrounds. Here we review these models and their application to studying respiratory viruses. Furthermore, given the ability of these systems to recapitulate the extracellular microenvironment, we evaluate their potential to serve as a platform for studies specifically addressing viral interactions at the mucosal surface and detail techniques that can be employed to expand our understanding.
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Affiliation(s)
- Ethan Iverson
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742, USA; (E.I.); (E.L.A.)
| | - Logan Kaler
- Biophysics Program, University of Maryland, College Park, MD 20742, USA; (L.K.); (G.A.D.)
| | - Eva L. Agostino
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742, USA; (E.I.); (E.L.A.)
| | - Daniel Song
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA;
| | - Gregg A. Duncan
- Biophysics Program, University of Maryland, College Park, MD 20742, USA; (L.K.); (G.A.D.)
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA;
| | - Margaret A. Scull
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742, USA; (E.I.); (E.L.A.)
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29
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Bravo MF, Lema MA, Marianski M, Braunschweig AB. Flexible Synthetic Carbohydrate Receptors as Inhibitors of Viral Attachment. Biochemistry 2020; 60:999-1018. [PMID: 33094998 DOI: 10.1021/acs.biochem.0c00732] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Carbohydrate-receptor interactions are often involved in the docking of viruses to host cells, and this docking is a necessary step in the virus life cycle that precedes infection and, ultimately, replication. Despite the conserved structures of the glycans involved in docking, they are still considered "undruggable", meaning these glycans are beyond the scope of conventional pharmacological strategies. Recent advances in the development of synthetic carbohydrate receptors (SCRs), small molecules that bind carbohydrates, could bring carbohydrate-receptor interactions within the purview of druggable targets. Here we discuss the role of carbohydrate-receptor interactions in viral infection, the evolution of SCRs, and recent results demonstrating their ability to prevent viral infections in vitro. Common SCR design strategies based on boronic ester formation, metal chelation, and noncovalent interactions are discussed. The benefits of incorporating the idiosyncrasies of natural glycan-binding proteins-including flexibility, cooperativity, and multivalency-into SCR design to achieve nonglucosidic specificity are shown. These studies into SCR design and binding could lead to new strategies for mitigating the grave threat to human health posed by enveloped viruses, which are heavily glycosylated viroids that are the cause of some of the most pressing and untreatable diseases, including HIV, Dengue, Zika, influenza, and SARS-CoV-2.
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Affiliation(s)
- M Fernando Bravo
- Advanced Science Research Center at the Graduate Center of the City University of New York, New York, New York 10031, United States.,Department of Chemistry and Biochemistry, Hunter College, New York, New York 10065, United States.,The PhD Program in Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States
| | - Manuel A Lema
- Advanced Science Research Center at the Graduate Center of the City University of New York, New York, New York 10031, United States.,Department of Chemistry and Biochemistry, City College of New York, New York, New York 10031, United States
| | - Mateusz Marianski
- Department of Chemistry and Biochemistry, Hunter College, New York, New York 10065, United States.,The PhD Program in Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States.,The PhD Program in Biochemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States
| | - Adam B Braunschweig
- Advanced Science Research Center at the Graduate Center of the City University of New York, New York, New York 10031, United States.,Department of Chemistry and Biochemistry, Hunter College, New York, New York 10065, United States.,The PhD Program in Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States.,The PhD Program in Biochemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States
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30
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Heida R, Bhide YC, Gasbarri M, Kocabiyik Ö, Stellacci F, Huckriede ALW, Hinrichs WLJ, Frijlink HW. Advances in the development of entry inhibitors for sialic-acid-targeting viruses. Drug Discov Today 2020; 26:122-137. [PMID: 33099021 PMCID: PMC7577316 DOI: 10.1016/j.drudis.2020.10.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/13/2020] [Accepted: 10/13/2020] [Indexed: 12/13/2022]
Abstract
Over the past decades, several antiviral drugs have been developed to treat a range of infections. Yet the number of treatable viral infections is still limited, and resistance to current drug regimens is an ever-growing problem. Therefore, additional strategies are needed to provide a rapid cure for infected individuals. An interesting target for antiviral drugs is the process of viral attachment and entry into the cell. Although most viruses use distinct host receptors for attachment to the target cell, some viruses share receptors, of which sialic acids are a common example. This review aims to give an update on entry inhibitors for a range of sialic-acid-targeting viruses and provides insight into the prospects for those with broad-spectrum potential.
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Affiliation(s)
- Rick Heida
- Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, 9713AV Groningen, The Netherlands
| | - Yoshita C Bhide
- Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, 9713AV Groningen, The Netherlands; Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, 9713AV Groningen, The Netherlands
| | - Matteo Gasbarri
- Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Özgün Kocabiyik
- Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Francesco Stellacci
- Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland; Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Anke L W Huckriede
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, 9713AV Groningen, The Netherlands
| | - Wouter L J Hinrichs
- Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, 9713AV Groningen, The Netherlands.
| | - Henderik W Frijlink
- Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, 9713AV Groningen, The Netherlands
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31
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Tran ENH, Day CJ, McCartney E, Poole J, Tse E, Jennings MP, Morona R. Shigella flexneri Targets Human Colonic Goblet Cells by O Antigen Binding to Sialyl-Tn and Tn Antigens via Glycan-Glycan Interactions. ACS Infect Dis 2020; 6:2604-2615. [PMID: 32926786 DOI: 10.1021/acsinfecdis.0c00178] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Shigella flexneri targets colonic cells in humans to initiate invasive infection processes that lead to dysentery, and direct interactions between their lipopolysaccharide O antigens and blood group A related glycans are involved in the cell adherence interactions. Here, we show that treatment with Tn and sialyl-Tn glycans, monoclonal antibodies and lectins reactive to Tn/sialyl-Tn, and luteolin (a Tn antigen synthesis inhibitor) all significantly inhibited S. flexneri adherence and invasion of cells in vitro. Surface plasmon resonance analysis showed that lipopolysaccharide O antigen had a high affinity interaction with Tn/sialyl-Tn. Immunofluorescence probing of human colon tissue with antibodies detected expression of Tn/sialyl-Tn by MUC2 producing goblet cells (GCs), and S. flexneri incubated with human colon tissue colocalized with GCs. Our findings demonstrate that S. flexneri targets GCs in the human colonic crypts via glycan-glycan interactions, establishing new insight into the infection process in humans.
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Affiliation(s)
- Elizabeth Ngoc Hoa Tran
- School of Biological Sciences, Research Centre for Infectious Diseases, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Christopher J. Day
- Institute for Glycomics, Griffith University, Gold Coast Campus, Brisbane, Queensland 4222, Australia
| | - Erin McCartney
- Gastroenterological/Hepatological Biobank, Royal Adelaide Hospital, Adelaide, South Australia 5000, Australia
| | - Jessica Poole
- Institute for Glycomics, Griffith University, Gold Coast Campus, Brisbane, Queensland 4222, Australia
| | - Edmund Tse
- Gastroenterological/Hepatological Biobank, Royal Adelaide Hospital, Adelaide, South Australia 5000, Australia
| | - Michael P. Jennings
- Institute for Glycomics, Griffith University, Gold Coast Campus, Brisbane, Queensland 4222, Australia
| | - Renato Morona
- School of Biological Sciences, Research Centre for Infectious Diseases, University of Adelaide, Adelaide, South Australia 5005, Australia
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Yang S, Wu WW, Shen R, Sjogren J, Parsons L, Cipollo JF. Optimization of O-GIG for O-Glycopeptide Characterization with Sialic Acid Linkage Determination. Anal Chem 2020; 92:10946-10951. [DOI: 10.1021/acs.analchem.0c01346] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shuang Yang
- Laboratory of Bacterial Polysaccharides, Division of Bacterial, Parasitic and Allergenic Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Wells W. Wu
- Facility for Biotechnology Resources, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Rongfong Shen
- Facility for Biotechnology Resources, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | | | - Lisa Parsons
- Laboratory of Bacterial Polysaccharides, Division of Bacterial, Parasitic and Allergenic Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - John F. Cipollo
- Laboratory of Bacterial Polysaccharides, Division of Bacterial, Parasitic and Allergenic Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
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Boukhvalova MS, Mortensen E, Mbaye A, McKay J, Blanco JCG. Effect of aging on immunogenicity and efficacy of inactivated influenza vaccines in cotton rats Sigmodon hispidus. Hum Vaccin Immunother 2020; 17:133-145. [PMID: 32614696 PMCID: PMC7872023 DOI: 10.1080/21645515.2020.1766334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Inactivated influenza vaccines are known to be less immunogenic in human elderly in regards to serologic antibody response induced by vaccination. Accumulating evidence, however, points to a comparable effectiveness of influenza vaccines in the young and the elderly individuals. In the current study, we assessed immunogenicity and effectiveness of trivalent inactivated vaccine FluLaval in young and aged cotton rats Sigmodon hispidus and found that while serologic response to immunization was indeed reduced in older animals, comparable protection against influenza infection was afforded by prime-boost vaccination in both young and aged cotton rats. Both hemagglutination inhibition (HAI) titers and seroconversion rates were lower in the aged animals compared to the young ones. Reduction of viral load in the lung and nose, however, was comparable between young and aged animals vaccinated twice. One-time immunization with FluLaval was less efficacious at protecting the nose of aged animals, indicating that boosting of preexisting immunity can be particularly important for nasal protection in the elderly. Coincidentally, a one-time immunization with FluLaval had a detrimental effect on pulmonary pathology in the young animals, suggesting that boosting of immunity is essential for the young as well. Overall, these results suggest that reduced antibody response to and sufficient efficacy of influenza vaccines in the elderly are not two irreconcilable phenomena and that incomplete immunity to influenza can be detrimental at any age.
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Lin B, Qing X, Liao J, Zhuo K. Role of Protein Glycosylation in Host-Pathogen Interaction. Cells 2020; 9:E1022. [PMID: 32326128 PMCID: PMC7226260 DOI: 10.3390/cells9041022] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/11/2020] [Accepted: 04/16/2020] [Indexed: 02/07/2023] Open
Abstract
Host-pathogen interactions are fundamental to our understanding of infectious diseases. Protein glycosylation is one kind of common post-translational modification, forming glycoproteins and modulating numerous important biological processes. It also occurs in host-pathogen interaction, affecting host resistance or pathogen virulence often because glycans regulate protein conformation, activity, and stability, etc. This review summarizes various roles of different glycoproteins during the interaction, which include: host glycoproteins prevent pathogens as barriers; pathogen glycoproteins promote pathogens to attack host proteins as weapons; pathogens glycosylate proteins of the host to enhance virulence; and hosts sense pathogen glycoproteins to induce resistance. In addition, this review also intends to summarize the roles of lectin (a class of protein entangled with glycoprotein) in host-pathogen interactions, including bacterial adhesins, viral lectins or host lectins. Although these studies show the importance of protein glycosylation in host-pathogen interaction, much remains to be discovered about the interaction mechanism.
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Affiliation(s)
- Borong Lin
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou 510642, China; (B.L.); (J.L.)
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China
| | - Xue Qing
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China;
| | - Jinling Liao
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou 510642, China; (B.L.); (J.L.)
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China
- Guangdong Eco-Engineering Polytechnic, Guangzhou 510520, China
| | - Kan Zhuo
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou 510642, China; (B.L.); (J.L.)
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China
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35
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Rubin SJS, Bloom MS, Robinson WH. B cell checkpoints in autoimmune rheumatic diseases. Nat Rev Rheumatol 2020; 15:303-315. [PMID: 30967621 DOI: 10.1038/s41584-019-0211-0] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
B cells have important functions in the pathogenesis of autoimmune diseases, including autoimmune rheumatic diseases. In addition to producing autoantibodies, B cells contribute to autoimmunity by serving as professional antigen-presenting cells (APCs), producing cytokines, and through additional mechanisms. B cell activation and effector functions are regulated by immune checkpoints, including both activating and inhibitory checkpoint receptors that contribute to the regulation of B cell tolerance, activation, antigen presentation, T cell help, class switching, antibody production and cytokine production. The various activating checkpoint receptors include B cell activating receptors that engage with cognate receptors on T cells or other cells, as well as Toll-like receptors that can provide dual stimulation to B cells via co-engagement with the B cell receptor. Furthermore, various inhibitory checkpoint receptors, including B cell inhibitory receptors, have important functions in regulating B cell development, activation and effector functions. Therapeutically targeting B cell checkpoints represents a promising strategy for the treatment of a variety of autoimmune rheumatic diseases.
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Affiliation(s)
- Samuel J S Rubin
- Immunology Program, Stanford University School of Medicine, Stanford, CA, USA.,Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA.,VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - Michelle S Bloom
- Immunology Program, Stanford University School of Medicine, Stanford, CA, USA.,Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA.,VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - William H Robinson
- Immunology Program, Stanford University School of Medicine, Stanford, CA, USA. .,Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA. .,VA Palo Alto Health Care System, Palo Alto, CA, USA.
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LeMessurier KS, Tiwary M, Morin NP, Samarasinghe AE. Respiratory Barrier as a Safeguard and Regulator of Defense Against Influenza A Virus and Streptococcus pneumoniae. Front Immunol 2020; 11:3. [PMID: 32117216 PMCID: PMC7011736 DOI: 10.3389/fimmu.2020.00003] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 01/03/2020] [Indexed: 12/27/2022] Open
Abstract
The primary function of the respiratory system of gas exchange renders it vulnerable to environmental pathogens that circulate in the air. Physical and cellular barriers of the respiratory tract mucosal surface utilize a variety of strategies to obstruct microbe entry. Physical barrier defenses including the surface fluid replete with antimicrobials, neutralizing immunoglobulins, mucus, and the epithelial cell layer with rapidly beating cilia form a near impenetrable wall that separates the external environment from the internal soft tissue of the host. Resident leukocytes, primarily of the innate immune branch, also maintain airway integrity by constant surveillance and the maintenance of homeostasis through the release of cytokines and growth factors. Unfortunately, pathogens such as influenza virus and Streptococcus pneumoniae require hosts for their replication and dissemination, and prey on the respiratory tract as an ideal environment causing severe damage to the host during their invasion. In this review, we outline the host-pathogen interactions during influenza and post-influenza bacterial pneumonia with a focus on inter- and intra-cellular crosstalk important in pulmonary immune responses.
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Affiliation(s)
- Kim S LeMessurier
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Pulmonology, Allergy-Immunology, and Sleep, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Le Bonheur Children's Hospital, Children's Foundation Research Institute, Memphis, TN, United States
| | - Meenakshi Tiwary
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Pulmonology, Allergy-Immunology, and Sleep, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Le Bonheur Children's Hospital, Children's Foundation Research Institute, Memphis, TN, United States
| | - Nicholas P Morin
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Critical Care Medicine, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Amali E Samarasinghe
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Pulmonology, Allergy-Immunology, and Sleep, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Le Bonheur Children's Hospital, Children's Foundation Research Institute, Memphis, TN, United States
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37
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Long JS, Mistry B, Haslam SM, Barclay WS. Host and viral determinants of influenza A virus species specificity. Nat Rev Microbiol 2020; 17:67-81. [PMID: 30487536 DOI: 10.1038/s41579-018-0115-z] [Citation(s) in RCA: 302] [Impact Index Per Article: 75.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Influenza A viruses cause pandemics when they cross between species and an antigenically novel virus acquires the ability to infect and transmit between these new hosts. The timing of pandemics is currently unpredictable but depends on ecological and virological factors. The host range of an influenza A virus is determined by species-specific interactions between virus and host cell factors. These include the ability to bind and enter cells, to replicate the viral RNA genome within the host cell nucleus, to evade host restriction factors and innate immune responses and to transmit between individuals. In this Review, we examine the host barriers that influenza A viruses of animals, especially birds, must overcome to initiate a pandemic in humans and describe how, on crossing the species barrier, the virus mutates to establish new interactions with the human host. This knowledge is used to inform risk assessments for future pandemics and to identify virus-host interactions that could be targeted by novel intervention strategies.
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Affiliation(s)
- Jason S Long
- Department of Medicine, Imperial College London, London, UK
| | - Bhakti Mistry
- Department of Medicine, Imperial College London, London, UK
| | - Stuart M Haslam
- Department of Life Sciences, Imperial College London, London, UK
| | - Wendy S Barclay
- Department of Medicine, Imperial College London, London, UK.
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38
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Hamming PHE, Overeem NJ, Huskens J. Influenza as a molecular walker. Chem Sci 2020; 11:27-36. [PMID: 32153750 PMCID: PMC7021193 DOI: 10.1039/c9sc05149j] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 11/13/2019] [Indexed: 12/11/2022] Open
Abstract
The surface of the influenza virus is decorated with the receptor-binding protein hemagglutinin (HA) and the receptor-cleaving enzyme neuraminidase (NA). HA is responsible for host cell recognition, while NA prevents aggregation and entrapment, but the intricate mechanism of how the functions of these glycoproteins cooperate and how they are regulated by mutational responses to environmental pressures remains unclear. Recently, several groups have described the motion of influenza over surfaces and reported that this motion is inhibited by NA inhibitors. We argue that the motion of influenza resembles the motility of artificial receptor-cleaving particles called "molecular spiders". The cleaving of receptors by this type of molecular walkers leads to self-avoiding motion across a surface. When the binding and cleaving rates of molecular spiders are balanced, they move both rapidly and efficiently. The studies of molecular spiders offer new insights into the functional balance of HA and NA, but they do not address the asymmetric distribution of HA and NA on the surface of influenza. We propose that receptor-cleaving molecular walkers could play an important role in the further investigation of the motility of influenza viruses.
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Affiliation(s)
- P H Erik Hamming
- Molecular Nanofabrication Group , MESA + Institute for Nanotechnology , Faculty of Science and Technology , University of Twente , P.O. Box 217 , 7500 AE Enschede , The Netherlands .
| | - Nico J Overeem
- Molecular Nanofabrication Group , MESA + Institute for Nanotechnology , Faculty of Science and Technology , University of Twente , P.O. Box 217 , 7500 AE Enschede , The Netherlands .
| | - Jurriaan Huskens
- Molecular Nanofabrication Group , MESA + Institute for Nanotechnology , Faculty of Science and Technology , University of Twente , P.O. Box 217 , 7500 AE Enschede , The Netherlands .
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39
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RETRACTED ARTICLE: Insights into the role of turkeys as potential intermediate host for influenza viruses. WORLD POULTRY SCI J 2019. [DOI: 10.1017/s0043933916000520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Phipps KR, Baldwin NJ, Lynch B, Stannard DR, Šoltésová A, Gilby B, Mikš MH, Röhrig CH. Toxicological safety assessment of the human-identical milk oligosaccharide 3'-sialyllactose sodium salt. J Appl Toxicol 2019; 39:1378-1393. [PMID: 31418894 DOI: 10.1002/jat.3824] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 04/24/2019] [Accepted: 05/01/2019] [Indexed: 12/20/2022]
Abstract
Human breastmilk is a mixture of nutrients, hormones and bioactive molecules that are vital for infant growth and development. Infant formula (IF) lacks many of these compounds, most notably human milk oligosaccharides (HMOs), which are abundant in breastmilk but scarce in IF. Sialyllactoses, such as 3'-sialyllactose, constitute a large portion of the HMO fraction. To produce IF that matches breastmilk more closely, biosynthesized human-identical milk oligosaccharides (structurally identical to HMOs) such as 3'-sialyllactose sodium salt (3'-SL) are proposed for use in IF and foods for the general population. The safety assessment of 3'-SL comprised in vitro genotoxicity tests and a 90-day oral (gavage) toxicity study. This is the first 90-day study conducted with 3'-SL using neonatal rats (7 days old at the start of dosing-equivalent age to newborn human infants in terms of central nervous system and reproductive development), demonstrating the safety of 3'-SL for consumption by infants, the most sensitive age group. The neonatal rats received 3'-SL at doses up to 5,000 mg/kg body weight (BW)/day and reference controls received 5,000 mg/kg BW/day of fructooligosaccharide (an ingredient approved for use in IF) for comparison with the high-dose 3'-SL group, followed by a 4-week recovery period. There was no evidence of genotoxicity in vitro. In the absence of any test item-related adverse effects in the 90-day study, the high dose (5,000 mg/kg BW/day) was established as the no-observed-adverse-effect level. This confirms the safety of 3'-SL for use in IF for infants, as well as in functional foods for the general population.
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Affiliation(s)
- Kirt R Phipps
- Intertek Scientific & Regulatory Consultancy, Farnborough, Hampshire, UK
| | - Nigel J Baldwin
- Intertek Scientific & Regulatory Consultancy, Farnborough, Hampshire, UK
| | - Barry Lynch
- Intertek Scientific & Regulatory Consultancy, Mississauga, Ontario, Canada
| | | | | | - Ben Gilby
- Envigo CRS Limited, Huntingdon, Cambridgeshire, UK
| | - Marta H Mikš
- Glycom A/S, Hørsholm, Denmark.,Faculty of Food Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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41
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Phipps KR, Baldwin NJ, Lynch B, Stannard DR, Šoltésová A, Gilby B, Mikš MH, Röhrig CH. Toxicological safety evaluation of the human-identical milk oligosaccharide 6'-sialyllactose sodium salt. J Appl Toxicol 2019; 39:1444-1461. [PMID: 31389052 DOI: 10.1002/jat.3830] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 04/24/2019] [Accepted: 05/06/2019] [Indexed: 01/01/2023]
Abstract
Human milk oligosaccharides (HMOs) are abundant in breastmilk, but their presence in infant formula is negligible. Sialylated HMOs, such as 6'-sialyllactose, constitute a significant portion of the HMO fraction of human milk and are linked to important biological functions. To produce infant formula that is more comparable with human milk, biosynthesized sialyllactoses known as human-identical milk oligosaccharides (structurally identical counterparts to their respective naturally occurring HMOs in breastmilk) are proposed for use in infant formula and other functional foods for the general population. To support the safety of 6'-sialyllactose sodium salt (6'-SL), a 90-day oral (gavage) toxicity study and in vitro genotoxicity tests were conducted. The 90-day study is the first to be conducted with 6'-SL using neonatal rats (day 7 of age at the start of dosing), thus addressing safety of 6'-SL for consumption by the most sensitive age group (infants). In the 90-day study, neonatal rats received 6'-SL at doses up to 5000 mg/kg body weight (BW)/day and reference controls received 5000 mg/kg BW/day of fructooligosaccharide (an ingredient approved for use in infant formula) for comparison with the high-dose 6'-SL group, followed by a 4-week recovery period. There was no evidence of genotoxicity in vitro. No test item-related adverse effects were observed on any parameter in the 90-day study, thus the high dose (5000 mg/kg BW/day) was established as the no-observed-adverse-effect level. These results confirm that 6'-SL is safe for use in formula milk for infants and in other functional foods for the general population.
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Affiliation(s)
- Kirt R Phipps
- Intertek Scientific & Regulatory Consultancy, Hampshire, UK
| | | | - Barry Lynch
- Intertek Scientific & Regulatory Consultancy, Mississauga, Ontario, Canada
| | | | | | - Ben Gilby
- Envigo CRS Limited, Cambridgeshire, UK
| | - Marta H Mikš
- Glycom A/S, Hørsholm, Denmark.,Faculty of Food Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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Abstract
The precise mechanisms underlying anti-inflammatory effects of intravenous immunoglobulin (IVIg) therapies remain elusive. The sialylated IgG fraction within IVIg has been shown to be therapeutically more active in mouse models. Functionally, it has been suggested that IgG undergoes conformational changes upon Fc-sialylation which sterically impede binding to conventional FcγRs, but simultaneously allow binding to human DC-SIGN (SIGN-R1 in mice) and also CD23. These latter C-type lectins have been proposed responsible for the immunomodulatory effects in mouse models. However, there is conflicting evidence supporting direct interactions between sialylated human IgG and CD23/DC-SIGN. While cells expressing human CD23 and DC-SIGN in their native configuration bound their natural ligands IgE and ICAM-3, respectively, no IgG binding was observed, regardless of Fc-glycan sialylation in any context (with or without bisection and/or fucosylation) or presence of sialylated Fab-glycans. This was tested by both by FACS and a novel cellular Surface Plasmon Resonance imaging (cSPRi) approach allowing for monitoring low-affinity but high-avidity interactions. In summary, we find no evidence for human CD23 or DC-SIGN being bona fide receptors to human IgG, regardless of IgG Fc- or Fab-glycosylation status. However, these results do not exclude the possibility that either IgG glycosylation or C-type lectins affect IVIg therapies.
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43
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Schmidt CQ, Hipgrave Ederveen AL, Harder MJ, Wuhrer M, Stehle T, Blaum BS. Biophysical analysis of sialic acid recognition by the complement regulator Factor H. Glycobiology 2019; 28:765-773. [PMID: 29982679 PMCID: PMC6142864 DOI: 10.1093/glycob/cwy061] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 07/01/2018] [Indexed: 01/13/2023] Open
Abstract
Complement factor H (FH), an elongated and substantially glycosylated 20-domain protein, is a soluble regulator of the complement alternative pathway (AP). It contains several glycan binding sites which mediate recognition of α2-3-linked sialic acid (FH domain 20) and glycosaminoglycans (domains 6–8 and 19–20). FH also binds the complement C3-activation product C3b, a powerful opsonin and focal point for the formation of C3-convertases of the AP feedback loop. In freely circulating FH the C3b binding site in domains 19–20 is occluded, a phenomenon that is not fully understood and could be mediated by an intramolecular interaction between FH’s intrinsic sialylated glycosylation and its own sialic acid binding site. In order to assess this possibility, we characterized FH’s sialylation with respect to glycosidic linkage type and searched for further potential, not yet characterized sialic acid binding sites in FH and its seven-domain spanning splice variant and fellow complement regulator FH like-1 (FHL-1). We also probed FH binding to the sialic acid variant Neu5Gc which is not expressed in humans but on heterologous erythrocytes that restrict the human AP and in FH transgenic mice. We find that FH contains mostly α2-6-linked sialic acid, making an intramolecular interaction with its α2-3-sialic acid specific binding site and an associated self-lock mechanism unlikely, substantiate that there is only a single sialic acid binding site in FH and none in FHL-1, and demonstrate direct binding of FH to the nonhuman sialic acid Neu5Gc, supporting the use of FH transgenic mouse models for studies of complement-related diseases.
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Affiliation(s)
- Christoph Q Schmidt
- Institute of Pharmacology of Natural Products and Clinical Pharmacology, Ulm University, Ulm, Germany
| | - Agnes L Hipgrave Ederveen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Albinusdreef, Leiden, The Netherlands
| | - Markus J Harder
- Institute of Pharmacology of Natural Products and Clinical Pharmacology, Ulm University, Ulm, Germany
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Albinusdreef, Leiden, The Netherlands
| | - Thilo Stehle
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany
| | - Bärbel S Blaum
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany
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44
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Cornelissen LAM, Blanas A, van der Horst JC, Kruijssen L, Zaal A, O'Toole T, Wiercx L, van Kooyk Y, van Vliet SJ. Disruption of sialic acid metabolism drives tumor growth by augmenting CD8 + T cell apoptosis. Int J Cancer 2019; 144:2290-2302. [PMID: 30578646 PMCID: PMC6519079 DOI: 10.1002/ijc.32084] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 12/05/2018] [Accepted: 12/10/2018] [Indexed: 12/27/2022]
Abstract
Sialylated glycan structures are known for their immunomodulatory capacities and their contribution to tumor immune evasion. However, the role of aberrant sialylation in colorectal cancer and the consequences of complete tumor desialylation on anti-tumor immunity remain unstudied. Here, we report that CRISPR/Cas9-mediated knock out of the CMAS gene, encoding a key enzyme in the sialylation pathway, in the mouse colorectal cancer MC38 cell line completely abrogated cell surface expression of sialic acids (MC38-Sianull ) and, unexpectedly, significantly increased in vivo tumor growth compared to the control MC38-MOCK cells. This enhanced tumor growth of MC38-Sianull cells could be attributed to decreased CD8+ T cell frequencies in the tumor microenvironment only, as immune cell frequencies in tumor-draining lymph nodes remained unaffected. In addition, MC38-Sianull cells were able to induce CD8+ T cell apoptosis in an antigen-independent manner. Moreover, low CMAS gene expression correlated with reduced recurrence-free survival in a human colorectal cancer cohort, supporting the clinical relevance of our work. Together, these results demonstrate for the first time a detrimental effect of complete tumor desialylation on colorectal cancer tumor growth, which greatly impacts the design of novel cancer therapeutics aimed at altering the tumor glycosylation profile.
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Affiliation(s)
- Lenneke A M Cornelissen
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Athanasios Blanas
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Joost C van der Horst
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Laura Kruijssen
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Anouk Zaal
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Tom O'Toole
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Lieke Wiercx
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Yvette van Kooyk
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Sandra J van Vliet
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
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45
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Abstract
Enterovirus D68 (EV-D68) is a pathogen that causes outbreaks of respiratory illness across the world, mostly in children, and can be especially severe in those with asthma. Clusters of acute flaccid myelitis, a poliomyelitis-like neuromuscular weakness syndrome, often occur concurrent with EV-D68 respiratory outbreaks. Seroepidemiologic studies have found that the serum of nearly everyone older than 2 to 5 years contains anti-EV-D68 neutralizing antibodies, which suggests that EV-D68 is a ubiquitous pathogen of childhood. However, knowledge of the viral epitopes against which the humoral immune response is directed is only inferred from previous studies of related viruses. Although neutralizing antibodies protect newborn mice from lethal EV-D68 inoculation via nonphysiologic routes, cotton rats have a mixed phenotype of both benefit and possible exacerbation when inoculated intranasally. The human antibody response to EV-D68 needs to be studied further to clarify the role of antibodies in protection versus pathogenesis, which might differ among respiratory and neurologic disease phenotypes.
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Affiliation(s)
- Matthew R Vogt
- Division of Infectious Diseases, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - James E Crowe
- Division of Infectious Diseases, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee.,Departments of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt Vaccine Center, Vanderbilt University Medical Center, Nashville, Tennessee
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46
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Both P, Riese M, Gray CJ, Huang K, Pallister EG, Kosov I, Conway LP, Voglmeir J, Flitsch SL. Applications of a highly α2,6-selective pseudosialidase. Glycobiology 2018; 28:261-268. [PMID: 29506202 DOI: 10.1093/glycob/cwy016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 02/27/2018] [Indexed: 12/15/2022] Open
Abstract
Within human biology, combinations of regioisomeric motifs of α2,6- or α2,3-sialic acids linked to galactose are frequently observed attached to glycoconjugates. These include glycoproteins and glycolipids, with each linkage carrying distinct biological information and function. Microbial linkage-specific sialidases have become important tools for studying the role of these sialosides in complex biological settings, as well as being used as biocatalysts for glycoengineering. However, currently, there is no α2,6-specific sialidase available. This gap has been addressed herein by exploiting the ability of a Photobacterium sp. α2,6-sialyltransferase to catalyze trans-sialidation reversibly and in a highly linkage-specific manner, acting as a pseudosialidase in the presence of cytidine monophosphate. Selective, near quantitative removal of α2,6-linked sialic acids was achieved from a wide range of sialosides including small molecules conjugates, simple glycan, glycopeptide and finally complex glycoprotein including both linkages.
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Affiliation(s)
- Peter Both
- School of Chemistry & Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK
| | - Michel Riese
- School of Chemistry & Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK
| | - Christopher J Gray
- School of Chemistry & Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK
| | - Kun Huang
- School of Chemistry & Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK
| | - Edward G Pallister
- School of Chemistry & Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK
| | - Iaroslav Kosov
- School of Chemistry & Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK
| | - Louis P Conway
- Glycomics Glycan Bioengineering Research Center, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Josef Voglmeir
- Glycomics Glycan Bioengineering Research Center, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Sabine L Flitsch
- School of Chemistry & Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK
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47
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Bourret V. Avian influenza viruses in pigs: An overview. Vet J 2018; 239:7-14. [PMID: 30197112 DOI: 10.1016/j.tvjl.2018.07.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 05/22/2018] [Accepted: 07/15/2018] [Indexed: 12/11/2022]
Abstract
This paper reviews important aspects of infection of pigs with avian influenza viruses. Wild waterfowl are the main reservoir for influenza A viruses; other species, such as pigs, can be infected, but most avian strains are imperfectly adapted to replication and transmission in such new hosts. However, some avian-to-porcine host jumps have resulted in the emergence of stable swine influenza virus lineages, with major consequences for both animal and human health. Different categories of factors are involved in these cross-species adaptations, both epidemiological (relating to host-host interactions) and virological (relating to host-virus interactions). An understanding of the adaptation of avian influenza viruses to pigs has benefited from a number of recent studies, but more research is warranted to fully appreciate the key molecular and epidemiological factors involved in this intriguing viral host jump.
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Affiliation(s)
- V Bourret
- Université de Montpellier, CEFE, Campus CNRS, 1919 route de Mende, 34293 Montpellier, France.
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48
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Finke JM, Banks WA. Modulators of IgG penetration through the blood-brain barrier: Implications for Alzheimer's disease immunotherapy. Hum Antibodies 2018; 25:131-146. [PMID: 28035915 DOI: 10.3233/hab-160306] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review serves to highlight approaches that may improve the access of antibody drugs to regions of the brain affected by Alzheimer's Disease. While previous antibody drugs have been unsuccessful in treating Alzheimer's disease, recent work demonstrates that Alzheimer's pathology can be modified if these drugs can penetrate the brain parenchyma with greater efficacy. Research in antibody blood-brain barrier drug delivery predominantly follows one of three distinct directions: (1) enhancing influx with reduced antibody size, addition of Trojan horse modules, or blood-brain barrier disruption; (2) modulating trancytotic equilibrium and/or kinetics of the neonatal Fc Receptor; and (3) manipulation of antibody glycan carbohydrate composition. In addition to these topics, recent studies are discussed that reveal a role of glycan sialic acid in suppressing antibody efflux from the brain.
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Affiliation(s)
- John M Finke
- Division of Sciences and Mathematics, Interdisciplinary Arts and Sciences, University of Washington Tacoma, Tacoma, WA, USA
| | - William A Banks
- Geriatric Research Education and Clinical Center, VA Puget Sound Health Care System, Seattle, WA, USA.,Department of Geriatric Medicine, Division of Gerontology and Geriatric Medicine, University of Washington School of Medicine, Seattle, WA, USA
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49
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Lowenstine LJ, McManamon R, Terio KA. Apes. PATHOLOGY OF WILDLIFE AND ZOO ANIMALS 2018. [PMCID: PMC7173580 DOI: 10.1016/b978-0-12-805306-5.00015-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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50
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Domm W, Yee M, Misra RS, Gelein R, Nogales A, Martinez-Sobrido L, O'Reilly MA. Oxygen-dependent changes in lung development do not affect epithelial infection with influenza A virus. Am J Physiol Lung Cell Mol Physiol 2017; 313:L940-L949. [PMID: 28798254 DOI: 10.1152/ajplung.00203.2017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/31/2017] [Accepted: 07/31/2017] [Indexed: 12/16/2022] Open
Abstract
Infants born prematurely often require supplemental oxygen, which contributes to aberrant lung development and increased pulmonary morbidity following a respiratory viral infection. We have been using a mouse model to understand how early-life hyperoxia affects the adult lung response to influenza A virus (IAV) infection. Prior studies showed how neonatal hyperoxia (100% oxygen) increased sensitivity of adult mice to infection with IAV [IAV (A/Hong Kong/X31) H3N2] as defined by persistent inflammation, pulmonary fibrosis, and mortality. Since neonatal hyperoxia alters lung structure, we used a novel fluorescence-expressing reporter strain of H1N1 IAV [A/Puerto Rico/8/34 mCherry (PR8-mCherry)] to evaluate whether it also altered early infection of the respiratory epithelium. Like Hong Kong/X31, neonatal hyperoxia increased morbidity and mortality of adult mice infected with PR8-mCherry. Whole lung imaging and histology suggested a modest increase in mCherry expression in adult mice exposed to neonatal hyperoxia compared with room air-exposed animals. However, this did not reflect an increase in airway or alveolar epithelial infection when mCherry-positive cells were identified and quantified by flow cytometry. Instead, a modest increase in the number of CD45-positive macrophages expressing mCherry was detected. While neonatal hyperoxia does not alter early epithelial infection with IAV, it may increase the activity of macrophages toward infected cells, thereby enhancing early epithelial injury.
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Affiliation(s)
- William Domm
- Department of Environmental Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York
| | - Min Yee
- Department of Pediatrics, School of Medicine and Dentistry, University of Rochester, Rochester, New York; and
| | - Ravi S Misra
- Department of Pediatrics, School of Medicine and Dentistry, University of Rochester, Rochester, New York; and
| | - Robert Gelein
- Department of Environmental Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York
| | - Aitor Nogales
- Department of Microbiology and Immunology, School of Medicine and Dentistry, University of Rochester, Rochester, New York
| | - Luis Martinez-Sobrido
- Department of Microbiology and Immunology, School of Medicine and Dentistry, University of Rochester, Rochester, New York
| | - Michael A O'Reilly
- Department of Pediatrics, School of Medicine and Dentistry, University of Rochester, Rochester, New York; and
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