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Mannose binding lectin

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https://www.readbyqxmd.com/read/29344374/cardioprotection-by-an-anti-masp-2-antibody-in-a-murine-model-of-myocardial-infarction
#1
James E Clark, Thomas Dudler, Michael S Marber, Wilhelm Schwaeble
Background: Myocardial ischaemia-reperfusion injury is a major cause of mortality and morbidity in the developed world. Many approaches have been investigated to counteract the pathological consequences associated with acute myocardial infarction (AMI) and cardiac remodelling. It is accepted that inflammation, and therefore activation of the complement pathway, is a crucial step in the pathogenesis of this injury, and many attempts have been made to ameliorate the infarction and consequent dysfunction using anticomplement therapy, with mixed success...
2018: Open Heart
https://www.readbyqxmd.com/read/29330473/endothelial-heparan-sulfate-deficiency-reduces-inflammation-and-fibrosis-in-murine-diabetic-nephropathy
#2
Ditmer T Talsma, Kirankumar Katta, Marieke A B Ettema, Berna Kel, Marion Kusche-Gullberg, Moh R Daha, Coen A Stegeman, Jacob van den Born, Lianchun Wang
Inflammation plays a vital role in the development of diabetic nephropathy, but the underlying regulatory mechanisms are only partially understood. Our previous studies demonstrated that, during acute inflammation, endothelial heparan sulfate (HS) contributes to the adhesion and transendothelial migration of leukocytes into perivascular tissues by direct interaction with L-selectin and the presentation of bound chemokines. In the current study, we aimed to assess the role of endothelial HS on chronic renal inflammation and fibrosis in a diabetic nephropathy mouse model...
January 12, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29325093/a-comprehensive-caenorhabditis-elegans-n-glycan-shotgun-array
#3
Ewa Jankowska, Lisa M Parsons, Xuezheng Song, Dave F Smith, Richard D Cummings, John F Cipollo
Here we present a Caenorhabditis elegans N-glycan shotgun array. This nematode serves as a model organism for many areas of biology including but not limited to tissue development, host-pathogen interactions, innate immunity, and genetics. C. elegans N-glycans contain structural motifs that are also found in other nematodes as well as trematodes and lepidopteran species. Glycan binding toxins that interact with C. elegans glycoconjugates also do so with some agriculturally relevant species, such as Haemonchus contortus, Ascaris suum, Oesophagostomum dentatum and Trichoplusia ni...
January 9, 2018: Glycobiology
https://www.readbyqxmd.com/read/29324290/ross-river-virus-envelope-glycans-contribute-to-disease-through-activation-of-the-host-complement-system
#4
Bronwyn M Gunn, Jennifer E Jones, Reed S Shabman, Alan C Whitmore, Sanjay Sarkar, Lance K Blevins, Thomas E Morrison, Mark T Heise
Mannose binding lectin (MBL) generally plays a protective role during viral infection, yet MBL-mediated complement activation promotes Ross River virus (RRV)-induced inflammatory tissue destruction, contributing to arthritis and myositis. As MBL binds to carbohydrates, we hypothesized that N-linked glycans on the RRV envelope glycoproteins act as ligands for MBL. Using a panel of RRV mutants lacking the envelope N-linked glycans, we found that MBL deposition onto infected cells was dependent on the E2 glycans...
January 8, 2018: Virology
https://www.readbyqxmd.com/read/29321379/a-glucose-responsive-insulin-therapy-protects-animals-against-hypoglycemia
#5
Ruojing Yang, Margaret Wu, Songnian Lin, Ravi P Nargund, Xinghai Li, Theresa Kelly, Lin Yan, Ge Dai, Ying Qian, Qing Dallas-Yang, Paul A Fischer, Yan Cui, Xiaolan Shen, Pei Huo, Danqing Dennis Feng, Mark D Erion, David E Kelley, James Mu
Hypoglycemia is commonly associated with insulin therapy, limiting both its safety and efficacy. The concept of modifying insulin to render its glucose-responsive release from an injection depot (of an insulin complexed exogenously with a recombinant lectin) was proposed approximately 4 decades ago but has been challenging to achieve. Data presented here demonstrate that mannosylated insulin analogs can undergo an additional route of clearance as result of their interaction with endogenous mannose receptor (MR), and this can occur in a glucose-dependent fashion, with increased binding to MR at low glucose...
January 11, 2018: JCI Insight
https://www.readbyqxmd.com/read/29314753/functional-mannose-binding-lectin-levels-in-patients-with-pediatric-onset-systemic-lupus-erythematosus-in-remission
#6
Siyaram Didel, Deepti Suri, Amit Rawat, Surjit Singh
BACKGROUND: Complement system plays a crucial role in the pathogenesis of systemic lupus erythematosus (SLE). Excessive activation of complement causes tissue injury and SLE occurrence is typically associated with congenital deficiencies of the early components of the classical complement pathway. Mannose-binding lectin (MBL) is recognized as important causative factor in the etio-pathogenesis of SLE and MBL-2 gene has evolved as a candidate gene for SLE susceptibility. AIM: This study was done to assess the functional MBL (fMBL) level in SLE patients in remission and its co-relation with disease severity and outcome...
January 4, 2018: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29306566/bispecific-chimeric-antigen-receptors-targeting-the-cd4-binding-site-and-high-mannose-glycans-of-gp120-optimized-for-anti-human-immunodeficiency-virus-potency-and-breadth-with-minimal-immunogenicity
#7
Mustafa H Ghanem, Sara Bolivar-Wagers, Barna Dey, Agnes Hajduczki, Diego A Vargas-Inchaustegui, David T Danielson, Virgilio Bundoc, Li Liu, Edward A Berger
BACKGROUND AIMS: Chimeric antigen receptors (CARs) offer great potential toward a functional cure of human immunodeficiency virus (HIV) infection. To achieve the necessary long-term virus suppression, we believe that CARs must be designed for optimal potency and anti-HIV specificity, and also for minimal probability of virus escape and CAR immunogenicity. CARs containing antibody-based motifs are problematic in the latter regard due to epitope mutation and anti-idiotypic immune responses against the variable regions...
January 3, 2018: Cytotherapy
https://www.readbyqxmd.com/read/29306444/probing-multivalent-protein-carbohydrate-interactions-by-quantum-dot-f%C3%A3-rster-resonance-energy-transfer
#8
Yuan Guo, W Bruce Turnbull, Dejian Zhou
Cell surface carbohydrate-binding proteins (also known as lectins) recognize surface carbohydrates of viral, bacterial, and fungal pathogens to regulate host immune responses; however, such interactions are also often exploited by pathogens to enhance infection. Multivalent binding is typically involved to compensate for the intrinsically weak nature of protein-carbohydrate interactions. The spatial orientation of carbohydrate recognition domains (CRDs) in multimeric lectins plays a central role in governing their binding affinity and specificity...
2018: Methods in Enzymology
https://www.readbyqxmd.com/read/29306029/proximity-ligation-detection-of-lectin-concanavalin-a-and-fluorescence-imaging-cancer-cells-using-carbohydrate-functionalized-dna-silver-nanocluster-probes
#9
Xiaoru Zhang, Fengting Chen, Xiaojie Song, Peng He, Shusheng Zhang
A novel method for study the interaction between carbohydrate and lectin was developed in homogenous solution. DNA was introduced to the recognition process of carbohydrate with protein. Due to the versatile detection mode of DNA, the detection efficiency for carbohydrate and protein was highly promoted. Herein, two kinds of mannose-DNA conjugates were synthesized. One of which was used to prepare DNA-templated silver nanocluster (AgNCs) and the other one contained guanine-rich DNA sequences. When the mannose of two conjugates binding to lectin Concanavalin A (Con A), great enhancement on fluorescence intensity was obtained due to the proximity ligation of the DNA-templated Ag NCs with guanine-rich DNA sequences...
December 31, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29282420/rapid-identification-of-pathogens-responsible-for-necrotizing-fasciitis-on-an-integrated-microfluidic-system
#10
Ju-Ching Yu, Pang-Hsin Hsieh, Hsing-Wen Tsai, Wen-Hsin Chang, Ting-Hang Liu, Mel S Lee, Kuo-Ti Peng, Kuo-Chin Huang, Gwo-Bin Lee
Necrotic fasciitis (NF) is a particularly aggressive and serious infection of the fascia that can penetrate into the musculature and internal organs, resulting in death if not treated promptly. In this work, an integrated microfluidic system composed of micropumps, microvalves, and micromixers was used to automate the detection of pathogens associated with NF. The entire molecular diagnostic process, including bacteria isolation, lysis, nucleic acid amplification and optical detection steps, was enacted on this developed system...
November 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/29276491/distribution-of-glycan-motifs-at-the-surface-of-midgut-cells-in-the-cotton-leafworm-spodoptera-littoralis-demonstrated-by-lectin-binding
#11
Tomasz Walski, Kristof De Schutter, Kaat Cappelle, Els J M Van Damme, Guy Smagghe
Glycans are involved in many biological phenomena, including signal transduction, cell adhesion, immune response or differentiation. Although a few papers have reported on the role of glycans in the development and proper functioning of the insect midgut, no data are available regarding the localization of the glycan structures on the surface of the cells in the gut of insects. In this paper, we analyzed the spatial distribution of glycans present on the surface of the midgut cells in larvae of the cotton leafworm Spodoptera littoralis, an important agricultural pest insect worldwide...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29273833/prospective-observational-study-on-the-association-between-serum-mannose-binding-lectin-levels-and-severe-outcome-in-critically-ill-patients-with-pandemic-influenza-type-a-h1n1-infection
#12
Elie Zogheib, Remy Nyga, Marjorie Cornu, Boualem Sendid, Julien Monconduit, Vincent Jounieaux, Julien Maizel, Christine Segard, Taïeb Chouaki, Hervé Dupont
BACKGROUND: Mannose-binding lectin (MBL) plays an important role in the innate immune response. In addition to activating the complement, MBL can induce cytokine production and contribute to a deleterious inflammatory response with severe A(H1N1)pdm09 virus infection. Our aim was to determine if serum MBL levels correlate with the risk of mortality in intensive care units (ICU) patients with A(H1N1)pdm09 infection. METHODS: Prospective observational study was performed in ICU patients with acute respiratory distress syndrome due to influenza A(H1N1)pdm09 virus...
December 22, 2017: Lung
https://www.readbyqxmd.com/read/29259668/what-contributes-to-an-effective-mannose-recognition-domain
#13
REVIEW
Christoph P Sager, Deniz Eriş, Martin Smieško, Rachel Hevey, Beat Ernst
In general, carbohydrate-lectin interactions are characterized by high specificity but also low affinity. The main reason for the low affinities are desolvation costs, due to the numerous hydroxy groups present on the ligand, together with the typically polar surface of the binding sites. Nonetheless, nature has evolved strategies to overcome this hurdle, most prominently in relation to carbohydrate-lectin interactions of the innate immune system but also in bacterial adhesion, a process key for the bacterium's survival...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29259314/lectin-activity-of-the-pneumococcal-pilin-proteins
#14
Christopher J Day, Adrienne W Paton, Richard M Harvey, Lauren E Hartley-Tassell, Kate L Seib, Joe Tiralongo, Nicolai Bovin, Silvana Savino, Vega Masignani, James C Paton, Michael P Jennings
Streptococcus pneumoniae is a leading cause of morbidity and mortality globally. The Pilus-1 proteins, RrgA, RrgB and RrgC of S. pneumoniae have been previously assessed for their role in infection, invasive disease and as possible vaccine candidates. In this study we have investigated the glycan binding repertoire of all three Pilus-1 proteins, identifying that the tip adhesin RrgA has the broadest glycan recognition of the three proteins, binding to maltose/cellobiose, α/β linked galactose and blood group A and H antigens...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29223879/internalization-of-a-sunflower-mannose-binding-lectin-into-phytopathogenic-fungal-cells-induces-cytotoxicity
#15
Marianela Del Rio, Laura de la Canal, Marcela Pinedo, Mariana Regente
Lectins are carbohydrate-affinity proteins with the ability to recognize and reversibly bind specific glycoconjugates. We have previously isolated a bioactive sunflower mannose-binding lectin belonging to the jacalin-related family called Helja. Despite of the significant number of plant lectins described in the literature, only a small group exhibits antifungal activity and the mechanism by which they kill fungi is still not understood. The aim of this work was to explore Helja activity on plant pathogenic fungi, and provide insights into its mechanism of action...
December 6, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29209066/interaction-of-complement-defence-collagens-c1q-and-mannose-binding-lectin-with-bmp-1-tolloid-like-proteinases
#16
Monique Lacroix, Agnès Tessier, Chantal Dumestre-Pérard, Sandrine Vadon-Le Goff, Evelyne Gout, Leena Bruckner-Tuderman, Dimitra Kiritsi, Alexander Nyström, Sylvie Ricard-Blum, Catherine Moali, David J S Hulmes, Nicole M Thielens
The defence collagens C1q and mannose-binding lectin (MBL) are immune recognition proteins that associate with the serine proteinases C1r/C1s and MBL-associated serine proteases (MASPs) to trigger activation of complement, a major innate immune system. Bone morphogenetic protein-1 (BMP-1)/tolloid-like proteinases (BTPs) are metalloproteinases with major roles in extracellular matrix assembly and growth factor signalling. Despite their different functions, C1r/C1s/MASPs and BTPs share structural similarities, including a specific CUB-EGF-CUB domain arrangement found only in these enzymes that mediates interactions with collagen-like proteins, suggesting a possible functional relationship...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29207079/molecular-basis-of-coronary-artery-dilation-and-aneurysms-in-patients-with-kawasaki-disease-based-on-differential-protein-expression
#17
Wanting Liu, Chaowu Liu, Li Zhang, Xiaofei Xie, Xiaoqiong Gu, Chuanlan Sang, Mingguo Xu, Weijun Xu, Hongling Jia
Kawasaki disease (KD) is an acquired cardiac disease with a high incidence that affects children. KD has various complications, including coronary artery dilation (CAD) and coronary artery aneurysms (CAA). The identification of differentially expressed proteins and the underlying mechanisms may be the key to understanding differences between these KD complications. In the present study, isobaric tags for relative and absolute quantitation were used to identify variations in serum proteins between KD patients with CAD and CAA...
November 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29198014/inhibition-of-complement-drives-increase-in-early-growth-response-proteins-and-neuroprotection-mediated-by-salidroside-after-cerebral-ischemia
#18
Wenfang Lai, XiuLi Xie, Xiaoqin Zhang, Yingzheng Wang, Kedan Chu, John Brown, Lidian Chen, Guizhu Hong
Salidroside is neuroprotective across a wide therapeutic time-window after cerebral ischemia-reperfusion injury (IRI). Here, we investigated the role of complement in mediating effects of salidroside after cerebral IRI in rats. Rats were administrated with vehicle or salidroside 50 mg/kg, given daily for either 24 or 48 h, after middle cerebral artery occlusion (MCAO) for 2 h and reperfusion for 1 h. Levels of proteins in ischemic brain were measured by immunofluorescence and western blotting. We observed early increases in the deposition of immunoglobulin M, mannose-binding lectin 2, and annexin IV on cerebral endothelial cells, induction of the complement components C3 and C3a, by 24 h after IRI, and a later significant increase in the complement component C1q by 48 h...
December 2, 2017: Inflammation
https://www.readbyqxmd.com/read/29162315/mannose-binding-lectin-deficiency-associated-with-numerous-paraspinal-neurofibromas
#19
Jason Schend, Rayna Doll, Monica Sandhu, Mark Rodgers, Robert Hostoffer
No abstract text is available yet for this article.
November 18, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29154855/identification-and-characterization-of-a-calcium-dependent-lily-type-lectin-from-black-rockfish-sebastes-schlegelii-molecular-antennas-are-involved-in-host-defense-via-pathogen-recognition
#20
Roopasingam Kugapreethan, Qiang Wan, Jehanathan Nilojan, Jehee Lee
Lily-type lectins (LTLs) are soluble pathogen recognition receptors (PRRs) that contain one or more characteristic carbohydrate recognition domains (CRDs), through which LTLs bind reversibly and specifically to cognate sugar moieties present on the invading pathogen membrane and trigger the host innate immune responses. In this study, we identified a LTL homolog (SsLTL) from black rockfish (Sebastes schlegelii) transcriptome database and its functional roles in innate immunity was investigated in vitro and in vivo...
November 14, 2017: Developmental and Comparative Immunology
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