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C-type lectin

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https://www.readbyqxmd.com/read/28729358/targeting-c-type-lectin-receptors-a-high-carbohydrate-diet-for-dendritic-cells-to-improve-cancer-vaccines
#1
REVIEW
Dieke van Dinther, Dorian A Stolk, Rieneke van de Ven, Yvette van Kooyk, Tanja D de Gruijl, Joke M M den Haan
There is a growing understanding of why certain patients do or do not respond to checkpoint inhibition therapy. This opens new opportunities to reconsider and redevelop vaccine strategies to prime an anticancer immune response. Combination of such vaccines with checkpoint inhibitors will both provide the fuel and release the brake for an efficient anticancer response. Here, we discuss vaccine strategies that use C-type lectin receptor (CLR) targeting of APCs, such as dendritic cells and macrophages. APCs are a necessity for the priming of antigen-specific cytotoxic and helper T cells...
July 20, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28719181/differential-ligand-binding-specificities-of-the-pulmonary-collectins-are-determined-by-the-conformational-freedom-of-a-surface-loop
#2
Michael J Rynkiewicz, Huixing Wu, Tanya R Cafarella, Nikolaos M Nikolaidis, James Frederick Head, Barbara A Seaton, Francis X McCormack
Lung surfactant proteins (SP) play critical roles in surfactant function and innate immunity. SP-A and SP-D, members of the collectin family of C-type lectins, exhibit distinct ligand specificities, effects on surfactant structure, and host defense functions despite extensive structural homology. SP-A binds to dipalmitoylphosphatidylcholine (DPPC), the major surfactant lipid component, but not phosphatidylinositol (PI), whereas SP-D shows the opposite preference. Additionally, SP-A and SP-D recognize widely divergent pathogen-associated molecular patterns...
July 18, 2017: Biochemistry
https://www.readbyqxmd.com/read/28718199/the-clec12a-receptor-marks-human-basophils-potential-implications-for-minimal-residual-disease-detection-in-myeloid-malignancies
#3
Marie Toft-Petersen, Anne Stidsholt Roug, Trine Plesner, Lene Ebbesen, Gordon D Brown, Line Nederby
BACKGROUND: The transmembrane receptor C-type lectin domain family 12, member A (CLEC12A) is known to be highly expressed on monocytes and neutrophils and is a reliable leukemia associated marker in acute myeloid leukemia. Consequently, detailed knowledge of the various normal cell types expressing this receptor is essential. We have observed CLEC12A to be expressed on CD45lowSSClowCD14-CD123+ basophils in peripheral blood (PB) and in the present study, we aimed at verifying this observation and further delineate the CD45lowSSClowCD14-CD123+CLEC12A+ subpopulation...
July 17, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28716912/sialylation-on-o-glycans-protects-platelets-from-clearance-by-liver-kupffer-cells
#4
Yun Li, Jianxin Fu, Yun Ling, Tadayuki Yago, J Michael McDaniel, Jianhua Song, Xia Bai, Yuji Kondo, Yannan Qin, Christopher Hoover, Samuel McGee, Bojing Shao, Zhenghui Liu, Roberto Sonon, Parastoo Azadi, Jamey D Marth, Rodger P McEver, Changgeng Ruan, Lijun Xia
Most platelet membrane proteins are modified by mucin-type core 1-derived glycans (O-glycans). However, the biological importance of O-glycans in platelet clearance is unclear. Here, we generated mice with a hematopoietic cell-specific loss of O-glycans (HC C1galt1(-/-) ). These mice lack O-glycans on platelets and exhibit reduced peripheral platelet numbers. Platelets from HC C1galt1(-/-) mice show reduced levels of α-2,3-linked sialic acids and increased accumulation in the liver relative to wild-type platelets...
July 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28716827/galectin-1-driven-tolerogenic-programs-aggravate-yersinia-enterocolitica-infection-by-repressing-antibacterial-immunity
#5
Roberto C Davicino, Santiago P Méndez-Huergo, Ricardo J Eliçabe, Juan C Stupirski, Ingo Autenrieth, María S Di Genaro, Gabriel A Rabinovich
Yersinia enterocolitica is an enteropathogenic bacterium that causes gastrointestinal disorders, as well as extraintestinal manifestations. To subvert the host's immune response, Y. enterocolitica uses a type III secretion system consisting of an injectisome and effector proteins, called Yersinia outer proteins (Yops), that modulate activation, signaling, and survival of immune cells. In this article, we show that galectin-1 (Gal-1), an immunoregulatory lectin widely expressed in mucosal tissues, contributes to Y...
July 17, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28715655/macrophage-exosomes-as-natural-nanocarriers-for-protein-delivery-to-inflamed-brain
#6
Dongfen Yuan, Yuling Zhao, William A Banks, Kristin M Bullock, Matthew Haney, Elena Batrakova, Alexander V Kabanov
Recent work has stimulated interest in the use of exosomes as nanocarriers for delivery of small drugs, RNAs, and proteins to the central nervous system (CNS). To overcome the blood-brain barrier (BBB), exosomes were modified with brain homing peptides that target brain endothelium but likely to increase immune response. Here for the first time we demonstrate that there is no need for such modification to penetrate the BBB in mammals. The naïve macrophage (Mϕ) exosomes can utilize, 1) on the one hand, the integrin lymphocyte function-associated antigen 1 (LFA-1) and intercellular adhesion molecule 1 (ICAM-1), and, 2) on the other hand, the carbohydrate-binding C-type lectin receptors, to interact with brain microvessel endothelial cells comprising the BBB...
July 10, 2017: Biomaterials
https://www.readbyqxmd.com/read/28706259/genetic-polymorphisms-of-c-type-lectin-receptors-in-behcet-s-disease-in-a-chinese-han-population
#7
Yi Yang, Handan Tan, Bolin Deng, Hongsong Yu, Guannan Su, Jiayue Hu, Qingfeng Cao, Gangxiang Yuan, Aize Kijlstra, Peizeng Yang
C-type lectin receptors (CLRs) have been demonstrated to be involved in several autoimmune diseases. The role of CLRs in Behcet's disease (BD) is unknown and thus was the purpose of this study. A two-stage association study was carried out and a total of 766 BD patients and 1674 healthy controls were recruited. Genotyping of 14 SNPs of 13 genes in CLRs was carried out by iPLEX Gold genotyping or polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay. The expression of mannose binding lectin 2 (MBL2) and killer cell lectin like receptor C4 (KLRC4) was measured by Real-time PCR...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28705934/gq-pathway-regulates-proximal-c-type-lectin-like-receptor-2-clec-2-signaling-in-platelets
#8
Rachit Badolia, Vaishali Inamdar, Bhanu Kanth Manne, Carol Dangelmaier, Satya P Kunapuli
Platelets play a key role in the physiological hemostasis or pathological process of thrombosis. Rhodocytin, an agonist of the C-type lectin like receptor-2 (CLEC-2), elicits powerful platelet activation signals in conjunction with Src family kinases (SFKs), spleen tyrosine kinase (Syk), and phospholipase γ2 (PLCγ2). Previous reports have shown that rhodocytin-induced platelet aggregation depends on secondary mediators such as thromboxane (TxA2) and ADP, which are agonists for G protein coupled receptors (GPCRs) on platelets...
July 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28705457/a-novel-c-type-lectin-gene-is-a-strong-candidate-gene-for-benedenia-disease-resistance-in-japanese-yellowtail-seriola-quinqueradiata
#9
Masatoshi Nakamoto, Yusuke Takeuchi, Kazuki Akita, Ryo Kumagai, Junpei Suzuki, Takashi Koyama, Tsutomu Noda, Kazunori Yoshida, Akiyuki Ozaki, Kazuo Araki, Takashi Sakamoto
Little is known about mechanisms of resistance to parasitic diseases in marine finfish. Benedenia disease is caused by infection by the monogenean parasite Benedenia seriolae. Previous quantitative trait locus (QTL) analyses have identified a major QTL associated with resistance to Benedenia disease in linkage group Squ2 of the Japanese yellowtail/amberjack Seriola quinqueradiata. To uncover the bioregulatory mechanism of Benedenia disease resistance, complete Illumina sequencing of BAC clones carrying genomic DNA for the QTL region in linkage group Squ2 was performed to reveal a novel C-type lectin in this region...
July 10, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28704364/dramatic-and-concerted-conformational-changes-enable-rhodocetin-to-block-%C3%AE-2%C3%AE-1-integrin-selectively
#10
Johannes A Eble, Matthew McDougall, George L Orriss, Stephan Niland, Benjamin Johanningmeier, Gottfried Pohlentz, Markus Meier, Simone Karrasch, Maria Inacia Estevão-Costa, Augusto Martins Lima, Jörg Stetefeld
The collagen binding integrin α2β1 plays a crucial role in hemostasis, fibrosis, and cancer progression amongst others. It is specifically inhibited by rhodocetin (RC), a C-type lectin-related protein (CLRP) found in Malayan pit viper (Calloselasma rhodostoma) venom. The structure of RC alone reveals a heterotetramer arranged as an αβ and γδ subunit in a cruciform shape. RC specifically binds to the collagen binding A-domain of the integrin α2 subunit, thereby blocking collagen-induced platelet aggregation...
July 2017: PLoS Biology
https://www.readbyqxmd.com/read/28691393/sequence-and-architectural-control-in-glycopolymer-synthesis
#11
REVIEW
Yamin Abdouni, Gokhan Yilmaz, C Remzi Becer
Glycopolymers are synthetic-carbohydrate-containing materials capable of interacting and binding to specific targeting lectins, which are crucially important in many biologically active processes. Over the last decade, advances in synthetic chemistry and polymerization techniques have enabled the development of sequence and architecturally controlled glycopolymers for different types of bioapplications, such as drug delivery and release purposes, gene therapy, lectin-based biosensors, and much more in the future...
July 10, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28687490/x-ray-structure-of-a-protease-resistant-mutant-form-of-human-galectin-9-having-two-carbohydrate-recognition-domains-with-a-metal-binding-site
#12
Hiromi Yoshida, Nozomu Nishi, Kenji Wada, Takanori Nakamura, Mitsuomi Hirashima, Naoyuki Kuwabara, Ryuichi Kato, Shigehiro Kamitori
Galectin-9 (G9) is a tandem-repeat type β-galactoside-specific animal lectin having N-terminal and C-terminal carbohydrate recognition domains (N-CRD and C-CRD, respectively) joined by a linker peptide that is involved in the immune system. G9 is divalent in glycan binding, and structural information about the spatial arrangement of the two CRDs is very important for elucidating its biological functions. As G9 is protease sensitive due to the long linker, the protease-resistant mutant form of G9 (G9Null) was developed by modification of the linker peptide, while retaining its biological functions...
July 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28686880/chicken-mannose-binding-lectin-has-antiviral-activity-towards-infectious-bronchitis-virus
#13
Weidong Zhang, Kim M Bouwman, Steven J van Beurden, Soledad R Ordonez, Martin van Eijk, Henk P Haagsman, M Hélène Verheije, Edwin J A Veldhuizen
Mannose binding lectin (MBL) is a collagenous C-type lectin, which plays an important role in innate immunity. It can bind to carbohydrates on the surface of a wide range of pathogens, including viruses. Here we studied the antiviral effect of recombinant chicken (rc)MBL against Infectious Bronchitis Virus (IBV), a highly contagious coronavirus of chicken. rcMBL inhibited in a dose-dependent manner the infection of BHK-21 cells by IBV-Beaudette, as detected by immunofluorescence staining of viral proteins and qPCR...
September 2017: Virology
https://www.readbyqxmd.com/read/28678158/early-hippocampal-i-ltp-and-lox-1-overexpression-induced-by-anoxia-a-potential-role-in-neurodegeneration-in-npc-mouse-model
#14
Adriana Lo Castro, Michela Murdocca, Sabina Pucci, Anna Zaratti, Chiara Greggi, Federica Sangiuolo, Virginia Tancredi, Claudio Frank, Giovanna D'Arcangelo
Niemann-Pick type C disease (NPCD) is an autosomal recessive storage disorder, characterized by abnormal sequestration of unesterified cholesterol within the late endo-lysosomal compartment of cells. In the central nervous system, hypoxic insults could result in low-density lipoprotein (LDL) oxidation and Lectin-like oxidized LDL receptor-1 (LOX-1) induction, leading to a pathological hippocampal response, namely, ischemic long-term potentiation (i-LTP). These events may correlate with the progressive neural loss observed in NPCD...
July 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28676343/treatment-of-acute-myeloid-leukemia-with-t-cells-expressing-chimeric-antigen-receptors-directed-to-c-type-lectin-like-molecule-1
#15
Haruko Tashiro, Tim Sauer, Thomas Shum, Kathan Parikh, Maksim Mamonkin, Bilal Omer, Rayne H Rouce, Premal Lulla, Cliona M Rooney, Stephen Gottschalk, Malcolm K Brenner
The successful immunotherapy of acute myeloid leukemia (AML) has been hampered because most potential antigenic targets are shared with normal hematopoietic stem cells (HSCs), increasing the risk of sustained and severe hematopoietic toxicity following treatment. C-type lectin-like molecule 1 (CLL-1) is a membrane glycoprotein expressed by >80% of AML but is absent on normal HSCs. Here we describe the development and evaluation of CLL-1-specific chimeric antigen receptor T cells (CLL-1.CAR-Ts) and we demonstrate their specific activity against CLL-1(+) AML cell lines as well as primary AML patient samples in vitro...
July 1, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28674748/platelet-activating-factor-podoplanin-from-discovery-to-drug-development
#16
Ai Takemoto, Kenichi Miyata, Naoya Fujita
Tumor cell-induced platelet aggregation facilitates hematogenous metastasis by promoting tumor embolization, preventing immunological assaults and shear stress, and the platelet-releasing growth factors support tumor growth and invasion. Podoplanin, also known as Aggrus, is a type I transmembrane mucin-like glycoprotein and is expressed on wide range of tumor cells. Podoplanin has a role in platelet aggregation and metastasis formation through the binding to its platelet receptor, C-type lectin-like receptor 2 (CLEC-2)...
July 3, 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/28674449/dexamethasone-induced-inhibition-of-dectin-1-activation-of-antigen-presenting-cells-is-mediated-via-stat-3-and-nf-%C3%AE%C2%BAb-signaling-pathways
#17
Philipp Kotthoff, Annkristin Heine, Stefanie Andrea Erika Held, Peter Brossart
Treatment of patients with glucocorticoids can result in an increased risk of infection with pathogens such as fungi. Dectin-1 is a member of the C-type lectin receptor superfamily and was shown to be one of the major receptors for fungal beta-glucans. Activation of Dectin-1 increases the production of cytokines and chemokines and T-cell stimulatory capacity of DC and mediates resolution of fungal infections. Here we show that antigen-presenting cells generated in the presence of dexamethasone (Dex-DC) have a reduced capacity to stimulate T-cell proliferation and decreased expression of costimulatory molecules, that can not be enhanced upon stimulation with Dectin-1 ligands...
July 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28672761/functional-control-of-polypeptide-galnac-transferase-3-through-an-acetylation-site-in-the-c-terminal-lectin-domain
#18
Virginia Lorenz, Romina B Cejas, Eric P Bennett, Gustavo A Nores, Fernando J Irazoqui
O-GalNAc glycans are important structures in cellular homeostasis. Their biosynthesis is initiated by members of polypeptide GalNAc-transferase (ppGalNAc-T) enzyme family. Mutations in ppGalNAc-T3 isoform cause diseases (congenital disorders of glycosylation) in humans. The K626 residue located in the C-terminal β-trefoil fold of ppGalNAc-T3 was predicted to be a site with high likelihood of acetylation by CBP/p300 acetyltransferase. We used a site-directed mutagenesis approach to evaluate the role of this acetylation site in biological properties of the enzyme...
June 27, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/28671670/multimerin-2-is-a-ligand-for-group-14-family-c-type-lectins-clec14a-cd93-and-cd248-spanning-the-endothelial-pericyte-interface
#19
K A Khan, A J Naylor, A Khan, P J Noy, M Mambretti, P Lodhia, J Athwal, A Korzystka, C D Buckley, B E Willcox, F Mohammed, R Bicknell
The C-type lectin domain containing group 14 family members CLEC14A and CD93 are proteins expressed by endothelium and are implicated in tumour angiogenesis. CD248 (alternatively known as endosialin or tumour endothelial marker-1) is also a member of this family and is expressed by tumour-associated fibroblasts and pericytes. Multimerin-2 (MMRN2) is a unique endothelial specific extracellular matrix protein that has been implicated in angiogenesis and tumour progression. We show that the group 14 C-type lectins CLEC14A, CD93 and CD248 directly bind to MMRN2 and only thrombomodulin of the family does not...
July 3, 2017: Oncogene
https://www.readbyqxmd.com/read/28667114/initial-gut-microbial-composition-as-a-key-factor-driving-host-response-to-antibiotic-treatment-as-exemplified-by-the-presence-or-absence-of-commensal-escherichia-coli
#20
Tingting Ju, Yasmeen Shoblak, Yanhua Gao, Kaiyuan Yang, Janelle Fouhse, B Brett Finlay, Yee Wing So, Paul Stothard, Benjamin P Willing
Antibiotics are important for treating bacterial infection, however, efficacy and side effects of antibiotics vary in medicine and experimental models. A few studies correlated microbiota composition variations with health outcomes in response to antibiotics, however, no study has demonstrated causality. We had noted variation in colonic expression of c-type lectins, regenerating islet-derived protein 3 (Reg3β) and Reg3γ, after metronidazole treatment in a mouse model. To investigate causality of specific variations in pre-existing microbiome on host response to antibiotics, mice harbouring a normal microbiota were allocated to 4 treatments in a 2x2 factorial arrangement with or without commensal Escherichia coli; and with or without metronidazole in drinking water...
June 30, 2017: Applied and Environmental Microbiology
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