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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/29775715/extraction-characterization-and-immunomodulatory-property-of-pectic-polysaccharide-from-pomegranate-peels-enzymatic-vs-conventional-approach
#3
Hassan Ahmadi Gavlighi, Mehdi Tabarsa, SangGuan You, Utoomporn Surayot, Maryam Ghaderi-Ghahfarokhi
Molecular characteristics, structural properties and immunostimulatory activities of polysaccharides from pomegranate peel were evaluated after 0.1 M HCl, Cellic CTec2 and buffer extractions. The isolated polysaccharides were mainly formed of neutral sugars (32.1%-51.1%) and uronic acids (19.9%-30.8%) as well as varying levels of proteins (15.0%-39.5%). Different levels of sugars including glucose (44.9%-68.1%), galactose (14.6%-19.4%), mannose (3.4%-18.1%), arabinose (3.1%-18.1%) and rhamnose (3.5-6.0%) constructed the structure of isolated polysaccharides...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29773885/metabolic-perturbations-of-post-load-hyperglycemia-vs-fasting-hyperglycemia
#4
Jing-Yi Lu, Jia-Hui Peng, Xiao-Jing Ma, Yi-Nan Zhang, Wei Zhu, Xing-Xing He, Ling-Wen Ying, Yu-Qian Bao, Jian Zhou, Wei-Ping Jia
There is evidence that post-load/post-meal hyperglycemia is a stronger risk factor for cardiovascular disease than fasting hyperglycemia. The underlying mechanism remains to be elucidated. The current study aimed to compare the metabolic profiles of post-load hyperglycemia and fasting hyperglycemia. All subjects received an oral glucose tolerance test (OGTT) and were stratified into fasting hyperglycemia (FH) or post-load hyperglycemia (PH). Forty-six (FH, n = 23; PH, n = 23) and 40 patients (FH, n = 20; PH, n = 20) were recruited as the exploratory and the validation set, respectively, and underwent metabolic profiling...
May 17, 2018: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/29773673/lysosomal-proteome-and-secretome-analysis-identifies-missorted-enzymes-and-their-non-degraded-substrates-in-mucolipidosis-iii-mouse-cells
#5
Giorgia Di Lorenzo, Renata Voltolini Velho, Dominic Winter, Melanie Thelen, Shiva Ahmadi, Michaela Schweizer, Raffaella De Pace, Kerstin Cornils, Timur Alexander Yorgan, Saskia Grüb, Irm Hermans-Borgmeyer, Thorsten Schinke, Sven Müller-Loennies, Thomas Braulke, Sandra Pohl
Targeting of soluble lysosomal enzymes requires mannose 6-phosphate (M6P) signals whose formation is initiated by the hexameric N-acetylglucosamine (GlcNAc)-1-phosphotransferase complex (α2β2γ2). Upon proteolytic cleavage by site-1 protease, the α/β-subunit precursor is catalytically activated but the functions of γ-subunits (Gnptg) in M6P modification of lysosomal enzymes are unknown. To investigate this, we analyzed the Gnptg expression in mouse tissues, primary cultured cells, and in Gnptg reporter mice in vivo, and found high amounts in the brain, eye, kidney, femur, vertebra and fibroblasts...
May 17, 2018: Molecular & Cellular Proteomics: MCP
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
#6
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/29771487/cancer-cell-membrane-coated-adjuvant-nanoparticles-with-mannose-modification-for-effective-anticancer-vaccination
#7
Rong Yang, Jun Xu, Ligeng Xu, Xiaoqi Sun, Qian Chen, Yuhuan Zhao, Rui Peng, Zhuang Liu
Tumor vaccines for cancer prevention and treatment have attracted tremendous interests in the area of cancer immunotherapy in recent years. In this work, we present a strategy to construct cancer vaccines by encapsulating immune-adjuvant nanoparticles with cancer cell membrane modified by mannose. Poly (D, L-lactide-co-glycolide) (PLGA) nanoparticles are firstly loaded with toll-like receptor 7 agonist, imiquimod (R837). Those adjuvant nanoparticles (NP-R) are then coated with cancer cell membranes (NP-R@M), whose surface proteins could act as tumor-specific antigens...
May 17, 2018: ACS Nano
https://www.readbyqxmd.com/read/29769659/mannose-6-phosphate-receptor-a-novel-regulator-of-t-cell-immunity
#8
Anjuman Ara, Khawaja Ashfaque Ahmed, Jim Xiang
No abstract text is available yet for this article.
May 16, 2018: Cellular & Molecular 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
#9
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
#10
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/29768009/use-of-dual-ligand-modification-in-kupffer-cell-targeted-liposomes-to-examine-the-contribution-of-kupffer-cells-to-accelerated-blood-clearance-abc-phenomenon
#11
Chaoyang Lai, Cong Li, Xiang Luo, Mengyang Liu, Xinrong Liu, Ling Hu, Le Kang, Qiujun Qiu, Yihui Deng, Yanzhi Song
The "accelerated blood clearance (ABC) phenomenon" is known to be involved in the adaptive immune system. Regretfully, the relationship between the ABC phenomenon and innate immune system, especially with respect to Kupffer cells (KCs) has been largely unexplored. In this study, the contribution of KCs to ABC was examined using the 4-aminophenyl-α-D-mannopyranoside (APM) lipid derivative DSPE-PEG2000-APM (DPM) and the 4-aminophenyl-β-L-fucopyranoside (APF) lipid derivative DSPE-PEG2000-APF (DPF) as ligands for mannose/fucose receptors on KCs, which were synthesized and modified on the surface of liposomes...
May 16, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29767655/proteomic-analysis-of-stachyose-contribution-to-the-growth-of-lactobacillus-acidophilus-cicc22162
#12
Xian-Feng Zhong, Yu-Bo Zhang, Gui-Dong Huang, Yong-Zhong Ouyang, Dong-Jiang Liao, Jia-Wei Peng, Wei-Zhi Huang
Stachyose is a functional oligosaccharide, acting as a potential prebiotic for colonic fermentation. To understand the mechanism of how stachyose promotes the growth of probiotic bacterium, we analyzed the differences of the proteome of Lactobacillus acidophilus grown on stachyose or glucose. By a combination of two-dimensional electrophoresis and mass spectrometry analysis, we observed 16 proteins differentially abundant under these two conditions and identified 9 protein spots. Six of these proteins were highly abundant when stachyose was used as the sole carbon source...
May 16, 2018: Food & Function
https://www.readbyqxmd.com/read/29767331/nonomuraea-insulae-sp-nov-isolated-from-forest-soil
#13
Salih Saricaoglu, Imen Nouioui, Hilal Ay, Hayrettin Saygin, Kadriye Inan Bektas, Kiymet Guven, Demet Cetin, Hans-Peter Klenk, Kamil Isik, Nevzat Sahin
Strain H2R21T , a novel actinobacterium, isolated from a forest soil sample collected from Heybeliada, Istanbul, Turkey, and a polyphasic approach was used for characterisation of the strain. Chemotaxonomic and morphological characterisation of strain H2R21T indicated that it belongs to the genus Nonomuraea. 16S rRNA gene sequence similarity showed that the strain is closely related to Nonomuraea purpurea 1SM4-01T (99.1%) and Nonomuraea solani CGMCC 4.7037T (98.4%). DNA-DNA relatedness values were found to be lower than 70% between the isolate and its phylogenetic neighbours N...
May 16, 2018: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29765378/epithelial-c5ar1-signaling-enhances-uropathogenic-escherichia-coli-adhesion-to-human-renal-tubular-epithelial-cells
#14
Yun Song, Kun-Yi Wu, Weiju Wu, Zhao-Yang Duan, Ya-Feng Gao, Liang-Dong Zhang, Tie Chong, Malgorzata A Garstka, Wuding Zhou, Ke Li
Recent work in a murine model of ascending urinary tract infection has suggested that C5a/C5aR1 interactions play a pathogenic role in the development of renal infection through enhancement of bacterial adhesion/colonization to renal tubular epithelial cells (RTECs). In the present study, we extended these observations to human. We show that renal tubular epithelial C5aR1 signaling is involved in promoting uropathogenic Escherichia coli (UPEC) adhesion/invasion of host cells. Stimulation of primary cultures of RTEC with C5a resulted in significant increases in UPEC adhesion/invasion of the RTEC...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29763701/differences-in-water-soluble-non-digestible-polysaccharides-and-anti-inflammatory-activities-of-fruiting-bodies-from-two-cultivated-xylaria-nipripes-strains
#15
Ching-Fu Chen, Chun-Han Su, Ming-Nan Lai, Lean-Teik Ng
Polysaccharides including β-glucans are important bioactive components of mushroom. Xylaria nigripes is a popular medicinal fungus that has been used for treating trauma, insomnia and mental illness. This study examined the physicochemical characteristics and anti-inflammatory activities of water soluble non-digestible polysaccharides (TXNP and CXNP) from fruiting bodies of two cultivated X. nigripes strains (TXN and CXN). Results showed that both TXNP and CXNP possessed relatively similar FT-IR spectra. TXNP had a triple helix conformation and molecular weight of 853...
May 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29761432/quantification-of-low-abundant-phosphorylated-carbohydrates-using-hilic-qqq-ms-ms
#16
Tiago F Jorge, Carla António
Phosphorylated carbohydrates are central metabolites involved in key plant metabolic pathways, such as glycolysis and central carbon metabolism. Such pathways influence plant growth, development, and stress responses to environmental changes, and ultimately, reflect the plant's energy status. The high polarity of these metabolites, the variety of isomeric structures (e.g., glucose-1-phosphate (G1P)/fructose-6-phosphate (F6P)/mannose-6-phosphate (M6P)/G6P, sucrose-6-phosphate (S6P)/T6P), and rapid metabolic turnover makes their analysis particularly challenging...
2018: Methods in Molecular Biology
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
#17
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/29753122/high-level-expression-and-glycosylation-of-recombinant-mycobacterium-tuberculosis-ala-pro-rich-antigen-in-pichia-pastoris
#18
Shengjun Wang, Yaoguang Wang, Peng George Wang, Min Chen, Yun Kong
The Ala-Pro-rich Antigen (Apa) from Mycobacterium tuberculosis is a mannosylated protein with immunogenic and antigenic properties. The O-mannosylation is essential for its biological function in the process of colonization and invasion of host cells by M. tuberculosis. In this work, the gene encoding Apa was cloned from M. tuberculosis and expressed in Pichia pastoris GS115. In shake-flasks, the recombinant Apa was secreted into the culture media and purified with a yield of 0.6 g/L. Both N- and O-glycans were found in recombinant Apa...
May 9, 2018: Protein Expression and Purification
https://www.readbyqxmd.com/read/29752722/a-new-cancer-immunotherapy-via-simultaneous-dc-mobilization-and-dc-targeted-ido-gene-silencing-using-an-immune-stimulatory-nanosystem
#19
Yujuan Zhang, Jiamin Fu, Yanmei Shi, Shanshan Peng, Ying Cai, Xuelin Zhan, Na Song, Yanling Liu, Zhigang Wang, Yanrong Yu, Yifan Wang, Qiaofa Shi, Yingyuan Fu, Keng Yuan, Nanjin Zhou, Rakesh Joshi, Thomas E Ichim, Weiping Min
The activity of negative immune regulatory molecules, such as indoleamine 2,3-oxygenase (IDO), significantly attenuates DC (Dendritic cells)-mediated immunotherapy. We have previously reported that knockdown of IDO using siRNA can reinstall anti-tumor immunity. However, a DC-targeted siRNA delivery system for in vivo mobilized DCs remains to be developed, while gene silencing in mobilized DCs for cancer immunotherapy has never been explored. In this study, we developed a novel DC-targeted siRNA delivery system, man-GNR-siIDO, using as a nanocarrier of siRNA specific for IDO (siIDO) and mannose (man) as a guide molecule for targeting DCs...
May 11, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29752310/extracellular-histones-inhibit-complement-activation-through-interacting-with-complement-component-4
#20
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
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