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https://www.readbyqxmd.com/read/28549117/engineering-of-recombinant-wisteria-floribunda-agglutinin-specifically-binding-to-galnac%C3%AE-1-4glcnac-lacdinac
#1
Takashi Sato, Hiroaki Tateno, Hiroyuki Kaji, Yasunori Chiba, Tomomi Kubota, Jun Hirabayashi, Hisashi Narimatsu
Wisteria floribunda agglutinin (WFA) is a useful probe for distinguishing glycan structural alterations in diseases such as intrahepatic bile duct carcinoma and hepatic fibrosis; however, the gene encoding WFA has not been identified. Here, we identified the gene encoding WFA, and recombinant WFA was expressed in Escherichia coli and purified. The natural cDNA sequence obtained from wisteria seeds contained an open reading frame of 861 nucleotides encoding a WFA precursor, which included a hydrophobic signal peptide at the N-terminus, a propeptide at the C-terminus and a single cysteine (Cys) residue for dimer formation...
May 26, 2017: Glycobiology
https://www.readbyqxmd.com/read/28546799/lectin-array-and-glycogene-expression-analyses-of-ovarian-cancer-cell-line-a2780-and-its-cisplatin-resistant-derivate-cell-line-a2780-cp
#2
Ran Zhao, Wenjun Qin, Ruihuan Qin, Jing Han, Can Li, Yisheng Wang, Congjian Xu
BACKGROUND: Ovarian cancer is one of the most lethal gynecological malignancies, in which platinum resistance is a common cause of its relapse and death. Glycosylation has been reported to be involved in drug resistance, and glycomic analyses of ovarian cancer may improve our understanding of the mechanisms underlying cancer cell drug resistance and provide potential biomarkers and therapeutic targets. METHODS: The serous ovarian cancer cell line A2780 and its platinum-resistant counterpart A2780-cp were used in this study...
2017: Clinical Proteomics
https://www.readbyqxmd.com/read/28546421/statins-attenuate-activation-of-the-nlrp3-inflammasome-by-oxidized-ldl-or-tnf-%C3%AE-in-vascular-endothelial-cells-through-a-pxr-dependent-mechanism
#3
Shaolan Wang, Xinya Xie, Ting Lei, Kang Zhang, Baochang Lai, Zihui Zhang, Youfei Guan, Guangmei Mao, Lei Xiao, Nanping Wang
Excessive activation of the NLRP3 inflammasome is implicated in cardiovascular diseases. Statins exert an anti-inflammatory effect independent of their cholesterol lowering effect. This study investigated the potential role of statins in the activation of the NLRP3 inflammasome in endothelial cells (ECs). Western blotting and qRT-PCR showed that oxidized-LDL (oxLDL) or tumor necrosis factor alpha (TNFα) activated the NLRP3 inflammasome in ECs. Simvastatin or mevastatin significantly suppressed the effects of oxLDL or TNFα...
May 25, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28546026/the-crustin-like-peptide-plays-opposite-role-in-shrimp-immune-response-to-vibrio-alginolyticus-and-white-spot-syndrome-virus-wssv-infection
#4
Baozhen Sun, Zhi Wang, Fei Zhu
Crustin is an antimicrobial peptide (AMP) that plays a key role in innate immunity of crustaceans. In this study, we cloned the entire 660 bp crustin-like sequence with a 507 bp open reading frame encoding a 168 amino acid from Marsupenaeus japonicus. The crustin-like gene was primarily expressed in gills and over-expressed in shrimp hemocytes after challenge with WSSV or Vibrio alginolyticus. After knockdown crustin-like gene using specific double-stranded RNA (CRU-dsRNA), IMD, Rab7, L-lectin, mitogen-activated protein kinase, p53, prophenoloxidase and Rho were down-regulated and nitric oxide synthase, myosin and tumor necrosis factor-α were up-regulated in hemocytes at 24 h post dsRNA treatment...
May 22, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28546025/molecular-and-functional-characterization-of-a-glycosylated-galactose-binding-lectin-from-mytilus-californianus
#5
Efrén García-Maldonado, Patricia Cano-Sánchez, Alejandra Hernández-Santoyo
Lectins play crucial roles for innate immune responses in invertebrates by recognizing and eliminating pathogens. In this study, a lectin from the mussel Mytilus californianus (MCL) was identified and characterized. The lectin was purified by affinity chromatography in α-lactose-agarose resin showing an experimental molecular weight of 18000 Da as determined by SDS-PAGE and MALDI-TOF mass spectrometry. It was specific for binding d-galactose and N-Acetyl-d-galactosamine that contained carbohydrate moieties that were also inhibited by melibiose and raffinose...
May 22, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28545372/lectin-carbohydrate-interactions-implications-for-the-development-of-new-anticancer-agents
#6
Evellyne de Oliveira Figueirôa, Cassia Regina Albuquerque da Cunha, Priscilla B S Albuquerque, Raiana Apolinário de Paula, Mary Ângela Aranda-Souza, Matheus Alves da Silva, Adrielle Zagmignan, Maria G Carneiro-da-Cunha, Luís Cláudio Nascimento da Silva, Maria Tereza Dos Santos Correia
Lectins are a large group of proteins found in animals, plants, fungi, and bacteria that recognize specific carbohydrate targets and play an important role in cell recognition and communication, host-pathogen interactions, embryogenesis, and tissue development. Recently, lectins have emerged as important biomedical tools that have been used in the development of immunomodulatory, antipathogenic, and anticancer agents. Several lectins have been shown to have the ability to discriminate between normal cells and tumor cells as a result of their different glycosylation patterns...
May 22, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28543759/abrus-agglutinin-promotes-irreparable-dna-damage-by-triggering-ros-generation-followed-by-atm-p73-mediated-apoptosis-in-oral-squamous-cell-carcinoma
#7
Niharika Sinha, Prashanta Kumar Panda, Prajna Paramita Naik, Durgesh Nandini Das, Subhadip Mukhopadhyay, Tapas K Maiti, Muthu K Shanmugam, Arunachalam Chinnathambi, M E Zayed, Sulaiman Ali Alharbi, Gautam Sethi, Rajesh Agarwal, Sujit K Bhutia
Oral cancer, a type of head and neck cancer, is ranked as one of the top most malignancies in India. Herein, we evaluated the anticancer efficacy of Abrus agglutinin (AGG), a plant lectin, in oral squamous cell carcinoma. AGG selectively inhibited cell growth, and caused cell cycle arrest and mitochondrial apoptosis through a reactive oxygen species (ROS)-mediated ATM-p73 dependent pathway in FaDu cells. AGG-induced ROS accumulation was identified as the major mechanism regulating apoptosis, DNA damage and DNA-damage response, which were significantly reversed by ROS scavenger N-acetylcysteine (NAC)...
May 23, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28543020/morphological-and-functional-aspects-of-the-epidermis-of-the-sea-lamprey-petromyzon-marinus-throughout-development
#8
R Rodríguez-Alonso, M Megías, M A Pombal, P Molist
The development of the epidermis of sea lamprey Petromyzon marinus along the whole life cycle was studied using conventional staining techniques and lectin histochemistry. The epidermis undergoes variations in morphology and thickness throughout development. The simple cuboidal epithelium found in the epidermis of prolarvae becomes stratified cubic in the adult by increasing the number of cell layers. The cuticle thickness undergoes a steady increase during the larval period. There are changes in the glycoconjugate composition of the three main cell types of the P...
May 22, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28542528/adaptation-of-candida-albicans-to-environmental-ph-induces-cell-wall-remodelling-and-enhances-innate-immune-recognition
#9
Sarah L Sherrington, Eleanor Sorsby, Nabeel Mahtey, Pizga Kumwenda, Megan D Lenardon, Ian Brown, Elizabeth R Ballou, Donna M MacCallum, Rebecca A Hall
Candida albicans is able to proliferate in environments that vary dramatically in ambient pH, a trait required for colonising niches such as the stomach, vaginal mucosal and the GI tract. Here we show that growth in acidic environments involves cell wall remodelling which results in enhanced chitin and β-glucan exposure at the cell wall periphery. Unmasking of the underlying immuno-stimulatory β-glucan in acidic environments enhanced innate immune recognition of C. albicans by macrophages and neutrophils, and induced a stronger proinflammatory cytokine response, driven through the C-type lectin-like receptor, Dectin-1...
May 22, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28540182/mannose-binding-lectin-mbl-gene-polymorphisms-in-susceptibility-to-pulmonary-tuberculosis-among-the-lur-population-of-lorestan-province-of-iran
#10
Ali Amiri, Toomaj Sabooteh, Farhad Shahsavar, Khatereh Anbari, Flora Pouremadi
OBJECTIVE: Tuberculosis (TB) is caused by infection of Mycobacterium tuberculosis. Host genetic variability is an important determinant of the risk of developing TB in humans. Although the association between MBL polymorphisms and TB has been studied in various populations, the results are controversial. The aim of this study was to investigate mannose-binding lectin (MBL) gene polymorphisms with susceptibility to pulmonary tuberculosis (PTB) in a Lur population of Iran. METHODS: In this case-control study, four functional MBL gene polymorphisms (HL, XY, PQ and AB) were genotyped by using PCR Single Strand Conformation Polymorphism (SSCP) technique in a Lur population living in Lorestan Province, consisting of 100 patients with pulmonary tuberculosis (PTB) age and sex matched 100 healthy controls (HCs)...
June 2017: Genomics Data
https://www.readbyqxmd.com/read/28536887/ficolin-2-gene-rs7851696-polymorphism-is-associated-with-delayed-graft-function-and-acute-rejection-in-kidney-allograft-recipients
#11
Ewa Dabrowska-Zamojcin, Michal Czerewaty, Damian Malinowski, Maciej Tarnowski, Sylwia Słuczanowska-Głabowska, Leszek Domanski, Krzysztof Safranow, Andrzej Pawlik
Ficolin-2 is an activator of the complement system that acts via the lectin pathway. Complement activation plays a substantial role in the renal injury inherent to kidney transplantation. In this study, we examined the associations between ficolin-2 gene polymorphisms in exon 8 and kidney allograft function. This study comprised 270 Caucasian deceased-donor renal transplant recipients. The following parameters were recorded in each case: delayed graft function (DGF), acute rejection (AR), and chronic allograft dysfunction...
May 23, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/28536555/novel-antifungal-activity-for-the-lectin-scytovirin-inhibition-of-cryptococcus-neoformans-and-cryptococcus-gattii
#12
Tyler H Jones, Erin E McClelland, Hana McFeeters, Robert L McFeeters
Pathogenic cryptococci are encapsulated yeast that can cause severe meningoencephalitis. Existing therapeutic options are dated and there is a growing need for new alternative antifungal agents for these fungi. Here we report novel inhibition of pathogenic cryptococci by the antimicrobial lectin Scytovirin. Inhibition was most potent against Cryptococcus neoformans var neoformans and C. gattii, with MFC values of 500 nM. Scytovirin binding was localized to the cell wall and shown to affect capsule size and release...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28536447/effects-of-hmasp-2-on-the-formation-of-bcg-infection-induced-granuloma-in-the-lungs-of-balb-c-mice
#13
Xiaoying Xu, Xiaoling Lu, Xingfang Dong, Yanping Luo, Qian Wang, Xun Liu, Jie Fu, Yuan Zhang, Bingdong Zhu, Xingming Ma
Tuberculosis, caused by Mycobacterium tuberculosis, affects the functions of the lung and causes high morbidity and mortality rates worldwide. MASP-2 is an executioner enzyme, which plays an essential role in the activation of lectin pathway. In our previous studies, the MASP-2 played a dual role in promoting the progress of lesions in BCG-infected rabbit skin models. However, the really effects of MASP-2 on tuberculosis are unknown. The aim of this study was to investigate the effects of MASP-2 in granuloma formation with BCG-infected mice...
May 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28535009/microrna-let-7g-alleviates-atherosclerosis-via-the-targeting-of-lox-1-in-vitro-and-in-vivo
#14
Mingxin Liu, Guizhou Tao, Qifeng Liu, Kun Liu, Xinchun Yang
Atherosclerosis is a chronic arterial disease and the leading cause of stroke and myocardial infarction. Micro-RNAs (miRNAs or miRs) have been reported to act as essential modulators during the progression of atherosclerosis. Although miR-let-7g has been demonstrated to contribute to maintaining endothelial function and vascular homeostasis, it is not known whether miR-let-7g exerts a therapeutic effect on experimental atherosclerosis. The aim of this study was to investigate the effects of miR-let-7g on atherosclerosis in vivo and in vitro and to explore its underlying mechanisms...
May 18, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28534963/n-acetylglucosaminyltransferase-iva-promotes-invasion-of-choriocarcinoma
#15
Kimihiro Nishino, Eiko Yamamoto, Kaoru Niimi, Yoko Sekiya, Yoriko Yamashita, Fumitaka Kikkawa
Gestational trophoblastic neoplasia (GTN) results from the malignant transformation of placental trophoblasts which secrete human chorionic gonadotropin (hCG) as do normal placenta or hydatidiform mole. N-acetylglucosaminyltransferase IV (GnT-IV) is a glycosyltransferase which catalyses the formation of β1,4GlcNAc branches on the mannose core of N-glycans. Previous studies reported that β1,4GlcNAc branches on hCG were detected in GTN but not in normal pregnancy or hydatidiform mole. The aim of the present study was to understand the role of GnT-IVa in choriocarcinoma and find the target proteins for GnT-IVa glycosylation which contribute to the malignancy of choriocarcinoma...
May 23, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28534482/an-engineered-high-affinity-fbs1-carbohydrate-binding-protein-for-selective-capture-of-n-glycans-and-n-glycopeptides
#16
Minyong Chen, Xiaofeng Shi, Rebecca M Duke, Cristian I Ruse, Nan Dai, Christopher H Taron, James C Samuelson
A method for selective and comprehensive enrichment of N-linked glycopeptides was developed to facilitate detection of micro-heterogeneity of N-glycosylation. The method takes advantage of the inherent properties of Fbs1, which functions within the ubiquitin-mediated degradation system to recognize the common core pentasaccharide motif (Man3GlcNAc2) of N-linked glycoproteins. We show that Fbs1 is able to bind diverse types of N-linked glycomolecules; however, wild-type Fbs1 preferentially binds high-mannose-containing glycans...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28533535/tail-tubular-protein-a-a-dual-function-tail-protein-of-klebsiella-pneumoniae-bacteriophage-kp32
#17
Anna Pyra, Ewa Brzozowska, Krzysztof Pawlik, Andrzej Gamian, Miroslawa Dauter, Zbigniew Dauter
Tail tubular protein A (TTPA) is a structural tail protein of Klebsiella pneumoniae bacteriophage KP32, and is responsible for adhering the bacteriophage to host cells. For the first time, we found that TTPA also exhibits lytic activity towards capsular exopolysaccharide (EPS) of the multiresistant clinical strain of Klebsiella pneumoniae, PCM2713, and thus should be regarded as a dual-function macromolecule that exhibits both structural and enzymatic actions. Here, we present our crystallographic and enzymatic studies of TTPA...
May 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28531220/highly-conserved-type-1-pili-promote-enterotoxigenic-e-coli-pathogen-host-interactions
#18
Alaullah Sheikh, Rasheduzzaman Rashu, Yasmin Ara Begum, F Matthew Kuhlman, Matthew A Ciorba, Scott J Hultgren, Firdausi Qadri, James M Fleckenstein
Enterotoxigenic Escherichia coli (ETEC), defined by their elaboration of heat-labile (LT) and/or heat-stable (ST) enterotoxins, are a common cause of diarrheal illness in developing countries. Efficient delivery of these toxins requires ETEC to engage target host enterocytes. This engagement is accomplished using a variety of pathovar-specific and conserved E. coli adhesin molecules as well as plasmid encoded colonization factors. Some of these adhesins undergo significant transcriptional modulation as ETEC encounter intestinal epithelia, perhaps suggesting that they cooperatively facilitate interaction with the host...
May 22, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28530644/intestinal-fungi-contribute-to-development-of-alcoholic-liver-disease
#19
An-Ming Yang, Tatsuo Inamine, Katrin Hochrath, Peng Chen, Lirui Wang, Cristina Llorente, Sena Bluemel, Phillipp Hartmann, Jun Xu, Yukinori Koyama, Tatiana Kisseleva, Manolito G Torralba, Kelvin Moncera, Karen Beeri, Chien-Sheng Chen, Kim Freese, Claus Hellerbrand, Serene Ml Lee, Hal M Hoffman, Wajahat Z Mehal, Guadalupe Garcia-Tsao, Ece A Mutlu, Ali Keshavarzian, Gordon D Brown, Samuel B Ho, Ramon Bataller, Peter Stärkel, Derrick E Fouts, Bernd Schnabl
Chronic liver disease with cirrhosis is the 12th leading cause of death in the United States, and alcoholic liver disease accounts for approximately half of all cirrhosis deaths. Chronic alcohol consumption is associated with intestinal bacterial dysbiosis, yet we understand little about the contribution of intestinal fungi, or mycobiota, to alcoholic liver disease. Here we have demonstrated that chronic alcohol administration increases mycobiota populations and translocation of fungal β-glucan into systemic circulation in mice...
May 22, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28529973/high-affinity-mannotetraose-as-an-alternative-to-dextran-in-cona-based-fluorescent-affinity-glucose-assay-due-to-improved-fret-efficiency
#20
Andrea K Locke, Brian M Cummins, Gerard L Coté
Diabetes mellitus affects millions of people worldwide and requires that individuals tightly self-regulate their blood glucose levels to minimize the associated secondary complications. Continuous monitoring devices potentially offer patients a long-term means to tightly monitor their glucose levels. In recent years, fluorescent affinity sensors based on lectins (e.g., Concanavalin A (ConA)) have been implemented in such devices. Traditionally, these sensors pair the lectin with a multivalent ligand, like dextran, in order to develop a competitive binding assay that changes its fluorescent properties in response to the surrounding glucose concentrations...
May 27, 2016: ACS Sensors
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