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Mannose binding lectin

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https://www.readbyqxmd.com/read/29775825/binding-capacity-of-mannose-binding-lectin-mbl-is-associated-with-the-severity-of-chronic-chagas-cardiomyopathy
#1
Elisa de A N Azevedo, Silvana Barreto, Raul Emídio de Lima, Romero Henrique Teixeira, George Diniz, Wilson Oliveira, Maria da Glória A M Cavalcanti, Yara M Gomes, Patrícia M M de F Moura, Clarice N L Morais
Chagas disease (CD) is a global problem. Currently, it affects approximately 15 million individuals in Latin America. It is well know that the human immune response is related to different clinical manifestations. Mannose binding lectin (MBL) plays an important role in innate immunity, and it mediates the phagocytosis and complement-mediated destruction of pathogens. The binding capacity is enhanced by the oligomerization of MBL. In this study, we evaluated the serum concentration and the binding capacity of MBL in patients with chronic chagasic cardiomyopathy...
May 15, 2018: Parasitology International
https://www.readbyqxmd.com/read/29775739/effects-of-environmental-factors-on-c-type-lectin-recognition-to-zooxanthellae-in-the-stony-coral-pocillopora-damicornis
#2
Zhi Zhou, Shuimiao Zhao, Junyi Ni, Yilu Su, Lingui Wang, Yanlai Xu
C-type lectin is a superfamily of Ca2+ -dependent carbohydrate-recognition proteins that play significant roles in nonself-recognition and pathogen clearance. In the present study, a C-type lectin (PdC-Lectin) was chosen from stony coral Pocillopora damicornis to understand its recognition characteristics to zooxanthellae. PdC-Lectin protein contained a signal peptide and a carbohydrate-recognition domain with EPN motif in Ca2+ -binding site 2. The PdC-Lectin recombinant protein was expressed and purified in vitro...
May 15, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29772373/a-novel-c-type-lectin-from-the-sea-cucumber-apostichopus-japonicus-ajctl-2-with-preferential-binding-of-d-galactose
#3
Hui Wang, Zhuang Xue, Zhaoqun Liu, Weilin Wang, Feifei Wang, Ying Wang, Lingling Wang, Linsheng Song
C-type lectins (CTLs) are Ca2+ dependent carbohydrate-binding proteins that share structural homology in their carbohydrate-recognition domains (CRDs). In the present study, a novel CTL was identified from sea cucumber Apostichopus japonicus (named as AjCTL-2). The deduced amino acid sequence of AjCTL-2 was homologous to CTLs from other animals with the identities ranging from 33% to 40%. It contained a canonical signal peptide at the N-terminus, a low density lipoprotein receptor class A (LDLa), a C1r/C1s/Uegf/bone morphogenetic protein 1 (CUB), and a CRD with two motif Glu-Pro-Asn (EPN) and Trp-Asn-Asp (WND) in Ca2+ binding site 2...
May 14, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29769410/human-anti-thrombospondin-type-1-domain-containing-7a-antibodies-induce-membranous-nephropathy-through-activation-of-lectin-complement-pathway
#4
Zheng Wang, Lu Wen, Yanna Dou, Zhanzheng Zhao
To investigate whether the human anti-thrombospondin type 1 domain-containing 7A (THSD7A) antibody-induced membranous nephropathy is mediated by activating lectin complement pathway. Automatic biochemical apparatus was used to assess renal function of mice. The serum levels of anti-THSD7A antibodies and complement were tested by using Enzyme-linked immunosorbent assay (ELISA). The expression level of THSD7A and Mannose-Binding Lectin (MBL) in clinical tissue, and the histological features of MN in mice were examined by immunochemical methods...
May 16, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29769321/lectin-mediated-binding-and-sialoglycans-of-porcine-surfactant-protein-d-synergistically-neutralize-influenza-a-virus
#5
Martin van Eijk, Michael J Rynkiewicz, Kshitij Khatri, Nancy Leymarie, Joseph Zaia, Mitchell R White, Kevan L Hartshorn, Tanya R Cafarella, Irma Van Die, Martin Hessing, Barbara A Seaton, Henk P Haagsman
Innate immunity is critical in the early containment of influenza A virus (IAV) infection, and surfactant protein D (SP-D) plays a crucial role in the pulmonary defense against IAV. In pigs, which are important intermediate hosts during the generation of pandemic IAVs, SP-D uses its unique carbohydrate recognition domain (CRD) to interact with IAV. An N-linked CRD-glycosylation provides interactions with the sialic acid binding site of IAV, and a tripeptide loop at the lectin binding site facilitates enhanced interactions with IAV glycans...
May 16, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29758096/low-maternal-serum-concentrations-of-mannose-binding-lectin-mbl-are-associated-with-the-risk-of-shorter-duration-of-pregnancy-and-lower-birth-weight
#6
Michal Koucký, Karin Malíčková, Helena Kopřivová, Tereza Cindrová-Davies, Hana Hrbáčková, Andrej Černý, Patrik Šimják, Antonín Pařízek, Tomáš Zima
BACKROUND: Chronic inflammation has been implicated as the underlying mechanism responsible for the pathophysiology of preterm labor. Mannose-bindig lectin (MBL) plays a central role in the innate immune response and is thus an important component of the first line of defense. The aim of this study was to investigate whether serum concentrations of MBL correlated with the incidence of preterm birth and low birth weight in a cohort of women with signs of threatened preterm birth. METHODS: A cohort of 60 patients who presented with regular contractions and/or short cervix (group A) between 24 to 32 weeks of gestation and 20 healthy controls (group B) who had no pregnancy complications and delivered at term were recruited into a prospective study...
May 14, 2018: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/29752310/extracellular-histones-inhibit-complement-activation-through-interacting-with-complement-component-4
#7
Yasir Qaddoori, Simon T Abrams, Paul Mould, Yasir Alhamdi, Stephen E Christmas, Guozheng Wang, Cheng-Hock Toh
Complement activation leads to membrane attack complex formation, which can lyse not only pathogens but also host cells. Histones can be released from the lysed or damaged cells and serve as a major type of damage-associated molecular pattern, but their effects on the complement system are not clear. In this study, we pulled down two major proteins from human serum using histone-conjugated beads: one was C-reactive protein and the other was C4, as identified by mass spectrometry. In surface plasmon resonance analysis, histone H3 and H4 showed stronger binding to C4 than other histones, with KD around 1 nM...
May 11, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29749490/use-of-ca15%C3%A2-3-for-screening-breast-cancer-an-antibody%C3%A2-lectin-sandwich-assay-for-detecting-glycosylation-of-ca15%C3%A2-3-in-sera
#8
Jae Woong Choi, Byung-In Moon, Jun Woo Lee, Hyoung Jin Kim, Yingji Jin, Hong-Jin Kim
Elevated serum CA15‑3 assessed by enzyme‑linked immunosorbent assay (ELISA) has been considered a diagnostic marker of breast cancer. However, accumulating data indicate that the current ELISA system for detecting CA15‑3, which targets the peptide backbone of CA15‑3, is not sufficiently sensitive to detect early or localized breast cancer. In the present study, we designed an antibody‑lectin sandwich assay detecting glycosylation of CA15‑3 in patients with breast cancer. Ιmmobilized anti‑CA15‑3 monoclonal antibody captures CA15‑3 in serum, and glycosylation of the CA15‑3 is detected with Concanavalin A (ConA) lectin, which preferentially bind high‑mannose N‑glycans...
May 10, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29743396/-congenital-factor-v-and-factor-viii-deficiency-discovered-in-an-elderly-patient-with-abnormal-bleeding-after-trauma
#9
Yoshiyuki Ogawa, Kunio Yanagisawa, Yuri Uchiyama, Akira Matsumoto, Madoka Inoue, Kohtaro Toyama, Yuri Miyazawa, Naomichi Matsumoto, Hiroshi Handa
Congenital combined deficiency of coagulation factor V (FV) and factor VIII (FVIII) (F5F8D) is a rare autosomal recessive bleeding disorder caused by mutations in lectin mannose-binding type 1 (LMAN1) or multiple coagulation factor deficiency 2 (MCFD2) encoding chaperone molecules involved in the intracellular transport of FV and FVIII. Here, we report a case of F5F8D in an elderly patient diagnosed with hematoma after a right thigh injury. A 71-year-old male had a history of abnormal bleeding after tooth extraction and cholecystectomy...
2018: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/29738673/top-down-chemoenzymatic-approach-to-synthesizing-diverse-high-mannose-n-glycans-and-related-neoglycoproteins-for-carbohydrate-microarray-analysis
#10
Christian Toonstra, Lisa Wu, Chao Li, Denong Wang, Lai-Xi Wang
High mannose type N-glycans are an important component of neutralizing epitopes on HIV-1 envelope glycoprotein gp120. They also serve as signals for protein folding, trafficking, and degradation in protein quality control. A number of lectins and antibodies recognize high-mannose type N-glycans, and glycan array technology has provided an avenue to probing these oligomannose-specific proteins. We describe in this paper a top-down chemoenzymatic approach to synthesizing a library of high-mannose N-glycans and related neoglycoproteins for glycan microarray analysis...
May 8, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29729385/the-chinese-herbal-formula-zhibai-dihuang-granule-treat-yin-deficiency-heat-syndrome-rats-by-regulating-the-immune-responses
#11
Chang-Ming Liu, Jing Chen, Su Yang, Lian-Gen Mao, Ting-Ting Jiang, Hui-Hui Tu, Zhong-Liang Chen, Yu-Ting Hu, Lin Gan, Zhong-Jie Li, Ji-Cheng Li
ETHNOPHARMACOLOGICAL RELEVANCE: Zhibai Dihuang Granule (ZDG), a traditional Chinese medicine (TCM) made from eight Chinese herbs, has been classically used to treat Yin-deficiency-heat (YDH) syndrome. ZDG is well known with the therapeutic efficacy of nourishing Yin and decreasing internal heat in clinic, but the mechanism of ZDG's therapeutic effect is still not clear. MATERIALS AND METHODS: High doses of triiodothyronine (T3) were given intraperitoneally to induce Hyperthyroid YDH syndrome in SD rats...
May 2, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29725633/complement-activation-in-patients-with-diabetic-nephropathy
#12
Pascal Bus, Jamie S Chua, Céline Q F Klessens, Malu Zandbergen, Ron Wolterbeek, Cees van Kooten, Leendert A Trouw, Jan A Bruijn, Hans J Baelde
Introduction: Complement activation plays a role in various organs in patients with diabetes. However, in diabetic nephropathy (DN), the role of complement activation is poorly understood. We examined the prevalence and clinical significance of complement deposits in the renal tissue of cases with type 1 and type 2 diabetes with and without DN. Methods: We measured the prevalence of glomerular C4d, C1q, mannose-binding lectin (MBL), and C5b-9 deposits in 101 autopsied diabetic cases with DN, 59 autopsied diabetic cases without DN, and 41 autopsied cases without diabetes or kidney disease...
March 2018: KI Reports
https://www.readbyqxmd.com/read/29717665/mannosylated-constructs-as-a-platform-for-cell-specific-delivery-of-bioactive-agents
#13
Sanjay Tiwari
Dictating the transport of drug carriers and augmenting the drug concentration at the desired anatomical site with high selectivity are worthwhile pursuits of current pharmaceutical research. Such approaches to drug targeting have been classified into passive and active strategies. As discussed in this article, active targeting promises greater selectivity because it exploits the incorporation of appropriate ligands, which are recognized by the target cells. Ligands, such as folate, peptides, transferrin, antibodies and their fragments, sugar, and sugar-mimetics, etc...
2018: Critical Reviews in Therapeutic Drug Carrier Systems
https://www.readbyqxmd.com/read/29693771/simple-glycolipid-mimic-of-phosphatidylinositol-mannoside-core-from-mycobacterium-tuberculosis-inhibits-macrophage-cytokine-production
#14
Tamim Mosaiab, Sandra Boiteux, Abu Zulfiker, Ming Wei, Milton J Kiefel, Todd A Houston
Glycolipids from Mycobacterium tuberculosis have a profound impact on the innate immune response of the host. Macrophage inducible C-type Lectin (Mincle) is a pattern recognition receptor that has been shown to bind trehalose dimycolate (TDM) from the mycobacteria and instigate intracellular signaling in the immune cell. There are structural similarities between TDM and phosphatidyl inositol mannoside (PIM) structures. We thus hypothesized that these latter structures might also modulate an immune response in a similar manner...
April 25, 2018: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29679592/multiple-coagulation-factor-deficiency-protein-2-as-a-crucial-component-in-metastasis-of-human-oral-cancer
#15
Megumi Fukamachi, Atsushi Kasamatsu, Yosuke Endo-Sakamoto, Kazuaki Fushimi, Hiroki Kasama, Manabu Iyoda, Yasuyuki Minakawa, Masashi Shiiba, Hideki Tanzawa, Katsuhiro Uzawa
Multiple coagulation factor deficiency protein 2 (MCFD2), a binding partner of lectin mannose binding 1 (LMAN1), causes combined deficiencies of coagulation factors V and VIII. MCFD2 function in inherited hematologic disorders is well elucidated; however, little is known about its role in human tumorigenesis. The aim of the current study was to investigate the states of MCFD2 in oral squamous cell carcinoma (OSCC). The expression of MCFD2 was up-regulated significantly in all cell lines examined. Evaluation of the cellular functions associated with tumoral metastasis showed that MCFD2 knockdown (shMCFD2) cells exhibited significantly lower cellular invasiveness and migration and higher cellular adhesion compared with shControl cells...
April 18, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29666116/critical-influences-on-the-pathogenesis-of-follicular-lymphoma
#16
Ralf Küppers, Freda K Stevenson
The development of follicular lymphoma (FL) from a founder B cell with an upregulation of BCL2, via the t(14;18) translocation, to a proliferating clone, poised to undergo further transformation to an aggressive lymphoma, illustrates the opportunistic Darwinian process of tumorigenesis. Protection against apoptosis allows an innocent cell to persist and divide, with dangerous accumulation of further mutational changes, commonly involving inactivation of chromatin-modifying genes. But this is not all. FL cells reflect normal B cells in relying on expression of surface Ig...
April 17, 2018: Blood
https://www.readbyqxmd.com/read/29629131/the-price-of-flexibility-a-case-study-on-septanoses-as-pyranose-mimetics
#17
Christoph P Sager, Brigitte Fiege, Pascal Zihlmann, Raghu Vannam, Said Rabbani, Roman P Jakob, Roland C Preston, Adam Zalewski, Timm Maier, Mark W Peczuh, Beat Ernst
Seven-membered ring mimetics of mannose were studied as ligands for the mannose-specific bacterial lectin FimH, which plays an essential role in the first step of urinary tract infections (UTI). A competitive binding assay and isothermal titration calorimetry (ITC) experiments indicated an approximately ten-fold lower affinity for the seven-membered ring mannose mimetic 2- O-n -heptyl-1,6-anhydro-d- glycero -d-galactitol ( 7 ) compared to n -heptyl α-d-mannopyranoside ( 2 ), resulting exclusively from a loss of conformational entropy...
January 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29627640/genetic-variants-structural-and-functional-changes-of-myelin-protein-zero-and-mannose-binding-lectin-2-protein-involved-in-immune-response-and-its-allelic-transmission-in-families-of-patients-with-leprosy-in-colombia
#18
Viviana Cardona-Pemberthy, Michelle Rendón, Juan Camilo Beltrán, Alejandro Soto-Ospina, Amalia Muñoz-Gomez, Pedronel Araque-Marín, Mauricio Corredor, Gabriel Bedoya, Nora Cardona-Castrod
Leprosy is a chronic infectious disease caused by Mycobacterium leprae. Genetic factors associated with immune response contribute to infection development and disease. M. leprae has the capacity to invade Schwann cells in the peripheral nervous system and cause neuropathy. However, while the responsible molecular mechanisms remain to be fully unveiled, they have begun being elucidated. We studied genetic variants Myelin Protein Zero (MPZ), a major structural component of the myelin sheath, and Mannose Binding Lectin 2 (MBL2), a protein involved in immune response, in 112 family groups of 114 leprosy patients using PCR-RFLP, aiming to calculate the association and allelic transmission of variants associated in first, second and third-degree relatives...
April 5, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29621634/novel-l-type-lectin-from-fresh-water-prawn-macrobrachium-rosenbergii-participates-in-antibacterial-and-antiviral-immune-responses
#19
Xin Huang, Keke Han, Tingting Li, Wen Wang, Qian Ren
L-type lectins (LTLs) play important roles in the secretory pathway of animals, including selective protein trafficking, sorting, and targeting. They have a leguminous lectin domain and can bind to high-mannose-type oligosaccharides. In this study, a novel LTL, designated as MrVIP36, was identified from Macrobrachium rosenbergii. The full-length cDNA of MrVIP36 was 1687 bp with a 972 bp open reading frame encoding a putative protein of 323 deduced amino acids. The deduced MrVIP36 protein contained an LTL-like domain (LTLD) and a transmembrane domain...
April 2, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29616193/a-comprehensive-in-silico-analysis-of-regulatory-snps-of-human-clec7a-gene-and-its-validation-as-genotypic-and-phenotypic-disease-marker-in-recurrent-vulvovaginal-infections
#20
Namarta Kalia, Manpreet Kaur, Sujata Sharma, Jatinder Singh
Recurrent Vulvovaginal infections (RVVI) are the commonly reported microbiological syndrome affecting millions of women globally. Various molecules of innate immune system are instrumental in clearance of these microbial pathogens, thus suggested as one of the most important contributing factor in determining the disease outcome. Dendritic cell-associated C-type lectin-1 (Dectin-1) is an important molecule of innate immunity that is primarily known for its role in antifungal defenses. However, role of dectin-1 in recognition of other pathogens is also documented...
2018: Frontiers in Cellular and Infection Microbiology
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