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https://www.readbyqxmd.com/read/28918528/signaling-of-the-complement-cleavage-product-anaphylatoxin-c5a-through-c5ar-cd88-contributes-to-pharmacological-hematopoietic-stem-cell-mobilization
#1
Kamila Bujko, Sylwia Rzeszotek, Kai Hoehlig, Jun Yan, Axel Vater, Mariusz Z Ratajczak
Several mechanisms have been postulated for orchestrating the mobilization of hematopoietic stem/progenitor cells (HSPCs), and we previously proposed that activation of the complement cascade plays a crucial role in the initiation and execution of the egress of HSPCs from bone marrow (BM) into peripheral blood (PB). In support of this notion, we demonstrated that mice deficient in the mannan-binding lectin (MBL) pathway, which activates the proximal part of the complement cascade, as well as mice deficient in the fifth component of the complement cascade (C5), which is part of the distal part of the complement cascade, are poor mobilizers...
September 16, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28916358/the-functional-characterization-and-comparison-of-two-single-crd-containing-c-type-lectins-with-novel-and-typical-key-motifs-from-portunus-trituberculatus
#2
Mengmeng Huang, Changkao Mu, Yuehong Wu, Fei Ye, Dan Wang, Cong Sun, Zhengbing Lv, Bingnan Han, Chunlin Wang, Xue-Wei Xu
C-type lectins are a superfamily of Ca(2+)-dependent carbohydrate-recognition proteins, which play crucial roles in innate immunity including nonself-recognition and pathogen elimination. In the present study, two single-CRD containing C-type lectins were identified from swimming crab Portunus trituberculatus (designated as PtCTL-2 and PtCTL-3). The open reading frame (ORF) of PtCTL-2 encoded polypeptides of 485 amino acids with a signal peptide and a single carbohydrate-recognition domain (CRD), while PtCTL-3's ORF encoded polypeptides of 241 amino acids with a coiled-coil region and a single-CRD...
September 12, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28915062/a-recombinant-fragment-of-human-surfactant-protein-d-suppresses-basophil-activation-th2-and-b-cell-responses-in-grass-pollen-induced-allergic-inflammation
#3
Asif S Qaseem, Iesha Singh, Ansar A Pathan, Janice A Layhadi, Rebecca Parkin, Fedina Alexandra, Stephen R Durham, Uday Kishore, Mohamed H Shamji
RATIONALE: rfhSP-D has been shown to suppress house dust mite and Aspergillus fumigatus-induced allergic inflammation in murine models. OBJECTIVES: We sought to elucidate the effect of rfhSP-D on FcεRI and CD23-mediated grass pollen induced allergic inflammatory responses. METHODS: rfhSP-D, containing homotrimeric neck and lectin domains, was expressed in Escherichia coli BL21 (λDE3) pLysS. PBMCs and sera were obtained from grass pollen allergic individuals (n=27)...
September 15, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28912543/inhibition-of-fucosylation-by-2-fluorofucose-suppresses-human-liver-cancer-hepg2-cell-proliferation-and-migration-as-well-as-tumor-formation
#4
Ying Zhou, Tomohiko Fukuda, Qinglei Hang, Sicong Hou, Tomoya Isaji, Akihiko Kameyama, Jianguo Gu
Core fucosylation is one of the most important glycosylation events in the progression of liver cancer. For this study, we used an easily handled L-fucose analog, 2-fluoro-L-fucose (2FF), which interferes with the normal synthesis of GDP-fucose, and verified its potential roles in regulating core fucosylation and cell behavior in the HepG2 liver cancer cell line. Results obtained from lectin blot and flow cytometry analysis clearly showed that 2FF treatment dramatically inhibited core fucosylation, which was also confirmed via mass spectrometry analysis...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28910094/hemicellulosic-polysaccharides-mimics-synthesis-of-tailored-bottlebrush-like-xyloglucan-oligosaccharide-glycopolymers-as-binders-of-nanocrystalline-cellulose
#5
Jing Chen, Christophe Travelet, Redouane Borsali, Sami Halila
We report in this contribution that while low molecular weight hemicellulosic building blocks are known not to interact with cellulosic materials, their multivalent presentation on a polymeric scaffold significantly enhanced the binding interactions that are remarkably in the same range as those usually observed for lectin-carbohydrate interactions. We developed a poly(propargyl methacrylate) scaffold on which we conjugated, by "post-click" reaction, a variety of azide reducing-end functionalized xyloglucan oligosaccharides with controlled enzymatic-mediated rate of degalactosylation...
September 14, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28906588/surface-glycan-pattern-of-canine-equine-and-ovine-bone-marrow-derived-mesenchymal-stem-cells
#6
Salvatore Desantis, Gianluca Accogli, Antonio Crovace, Edda G Francioso, Alberto Maria Crovace
The use of bone marrow-derived mesenchymal stem cells (MSCs) for clinical and experimental studies is increasing, but full characterization of MSCs in veterinary species is hindered by the variability in species-specific cell surface marker expression and antibody cross reactivity. Recent studies demonstrated that the glycans in the glycocalyx of MSCs are promising candidates as cell biomarkers. In the present study, we analyzed the glycocalyx of canine MSCs (cMSCs), ovine MSCs (oMSCs), and equine MSCs (eMSCs) using a cell microarray procedure in which MSCs were spotted on microarray slides and incubated with a panel of 14 biotinylated lectins and Cy3-conjugated streptavidin...
September 14, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28905193/siglec-8-as-mast-cell-selective-target-developing-paradigms-amidst-inconvenient-truths
#7
Gerhard J Molderings
Due to the limited efficacy of current drugs in treating systemic mast cell activation disease, there is an urgent need for more effective drugs selectively acting at mast cells. In the past, a large number of compounds have been claimed to be effective and mast cell selective on the basis of cell culture experiments and studies on blood leukocytes which could not be verified in organ and animal studies. Nevertheless, over time in review papers about potential mast cell targets mast cell selectivity of these targets has been no longer challenged...
September 14, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28899232/rna-seq-reveals-a-central-role-for-lectin-c1q-and-von-willebrand-factor-a-domains-in-the-defensive-glue-of-a-terrestrial-slug
#8
Andrew M Smith, Cassandra Papaleo, Christopher W Reid, Joseph M Bliss
The tough, hydrogel glue produced by the slug Arion subfuscus achieves impressive performance through metal-based, protein cross-links. The primary sequence of these proteins was determined through transcriptome sequencing and proteome analysis by tandem mass spectrometry. The main proteins that correlate with adhesive function are a group of 11 small, highly abundant lectin-like proteins. These proteins matched the ligand-binding C-lectin, C1q or H-lectin domains. The variety of different lectin-like proteins and their potential for oligomerization suggests that they function as versatile and potent cross-linkers...
September 13, 2017: Biofouling
https://www.readbyqxmd.com/read/28899088/identification-of-siglec-ligands-using-a-proximity-labeling-method
#9
Lanyi Chang, Yi-Ju Chen, Chan-Yo Fan, Chin-Ju Tang, Yi-Hsiu Chen, Penk-Yeir Low, Albert Ventura, Chun-Cheng Lin, Yu-Ju Chen, Takashi Angata
Siglecs are a family of receptor-type glycan recognition proteins (lectins) involved in self-nonself discrimination by the immune system. Identification of Siglec ligands is necessary to understand how Siglec-ligand interaction translates into biological outcomes. However, this is challenging because the interaction is weak. To facilitate identification of Siglec ligands, we adopted a proximity labeling method based on the tyramide radicalization principle. Cells that express Siglec ligands were labeled with Siglec-peroxidase complexes and incubated with biotin tyramide and hydrogen peroxide, to generate short-lived tyramide radicals that covalently label the proteins near the Siglec-peroxidase complex...
September 13, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28898769/lox-1-is-involved-in-il-1%C3%AE-production-and-extracellular-matrix-breakdown-in-dental-peri-implantitis
#10
Chengye Che, Jie Liu, Lei Ma, Huirong Xu, Na Bai, Qian Zhang
PURPOSE: To explore whether lectin-type oxidized LDL receptor 1 (LOX-1), interleukin 1 beta (IL-1β), matrix metalloproteinase 2 (MMP2) and matrix metalloproteinase 9 (MMP9) are involved in the nosogenesis of human dental peri-implantitis and determine the role of LOX-1 in IL-1β, MMP2 and MMP9 production in response to Porphyromonas gingivalis. METHODS: Peri-implant crevicular fluid (PICF) was collected from ten patients with healthy implants and ten patients with peri-implantitis...
September 9, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28898525/analyses-of-n-linked-glycans-of-prp-s-c-revealed-predominantly-2-6-linked-sialic-acid-residues
#11
Elizaveta Katorcha, Ilia V Baskakov
Mammalian prions (PrP(S)(c) ) consist of misfolded, conformationally altered, self-replicating states of the sialoglycoprotein called prion protein or PrP(C) . Recent studies revealed that the sialylation status of PrP(S)(c) plays a major role in evading innate immunity and infecting a host. Establishing the type of linkage by which sialic acid residues are attached to galactose is important, as it helps to identify the sialyltransferases responsible for sialylating PrP(C) and outline strategies for manipulating the sialyation status of PrP(S)(c) ...
September 12, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28898115/mannose-binding-lectin-deficiency-and-miscarriages-in-rheumatoid-arthritis
#12
Juliana Z Cieslinski, Isabela Goeldner, Thelma L Skare, Renato Nisihara, Fabiana A De Andrade, Thirumalaisamy P Velavan, Iara Messias-Reason, Shirley R R Utiyama
OBJECTIVE: To investigate the association between mannose-binding lectin (MBL) serum level and MBL2 polymorphisms, and the frequency of spontaneous miscarriages in rheumatoid arthritis (RA) patients. METHODS: One hundred seventy seven women (mean age 50 years) with RA from Southern Brazil were studied and 4.5% had a history of abortion (8/177). The MBL levels were determined by ELISA. MBL2 polymorphisms in the promoter (-550H/L, -221X/Y), 5' untranslated region (4 P/Q) and exon 1 (p...
September 12, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28894966/targeting-cancer-specific-glycans-by-cyclic-peptide-lectinomimics
#13
Maria C Rodriguez, Austin B Yongye, Mihael Cudic, Karina Martinez Mayorga, Enbo Liu, Barbara M Mueller, Jon Ainsley, Tatyana Karabencheva-Christova, Christo Z Christov, Mare Cudic, Predrag Cudic
The transformation from normal to malignant phenotype in human cancers is associated with aberrant cell-surface glycosylation. Thus, targeting glycosylation changes in cancer is likely to provide not only better insight into the roles of carbohydrates in biological systems, but also facilitate the development of new molecular probes for bioanalytical and biomedical applications. In the reported study, we have synthesized lectinomimics based on odorranalectin 1; the smallest lectin-like cyclic peptide isolated from the frog Odorrana grahami skin, and assessed the ability of these peptides to bind specific carbohydrates on molecular and cellular levels...
September 11, 2017: Amino Acids
https://www.readbyqxmd.com/read/28894916/structural-and-functional-diversity-of-collectins-and-ficolins-and-their-relationship-to-disease
#14
REVIEW
Mark Howard, Conrad A Farrar, Steven H Sacks
Pattern recognition molecules are sensors for the innate immune system and trigger a number of pathophysiological functions after interaction with the corresponding ligands on microorganisms or altered mammalian cells. Of those pattern recognition molecules used by the complement system, collagen-like lectins (collectins) are an important subcomponent. Whereas the best known of these collectins, mannose-binding lectin, largely occurs as a circulating protein following production by hepatocytes, the most recently described collectins exhibit strong local biosynthesis...
September 11, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28894650/lectins-an-effective-tool-for-screening-of-potential-cancer-biomarkers
#15
Onn Haji Hashim, Jaime Jacqueline Jayapalan, Cheng-Siang Lee
In recent years, the use of lectins for screening of potential biomarkers has gained increased importance in cancer research, given the development in glycobiology that highlights altered structural changes of glycans in cancer associated processes. Lectins, having the properties of recognizing specific carbohydrate moieties of glycoconjugates, have become an effective tool for detection of new cancer biomarkers in complex bodily fluids and tissues. The specificity of lectins provides an added advantage of selecting peptides that are differently glycosylated and aberrantly expressed in cancer patients, many of which are not possibly detected using conventional methods because of their low abundance in bodily fluids...
2017: PeerJ
https://www.readbyqxmd.com/read/28893908/the-intrinsically-disordered-n-terminal-domain-of-galectin-3-dynamically-mediates-multisite-self-association-of-the-protein-through-fuzzy-interactions
#16
Yu-Hao Lin, De-Chen Qiu, Wen-Han Chang, Yi-Qi Yeh, U-Ser Jeng, Fu-Tong Liu, Jie-Rong Huang
Galectins are a family of lectins that bind β-galactosides through their conserved carbohydrate recognition domain (CRD) and can induce aggregation with glycoproteins or glycolipids on the cell surface and thereby regulate cell activation, migration, adhesion, and signaling. Galectin-3 has an intrinsically disordered N-terminal domain (NTD) and a canonical CRD. Unlike the other 14 known galectins in mammalian cells, which have dimeric or tandem-repeated CRDs enabling multivalency for various functions, galectin-3 is monomeric, and its functional multivalency therefore is somewhat of a mystery...
September 11, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28892824/resolvin-d1-increases-mucin-secretion-in-cultured-rat-conjunctival-goblet-cells-via-multiple-signaling-pathways
#17
Marit Lippestad, Robin R Hodges, Tor P Utheim, Charles N Serhan, Darlene A Dartt
Purpose: Goblet cells in the conjunctiva secrete mucin into the tear film protecting the ocular surface. The proresolution mediator resolvin D1 (RvD1) regulates mucin secretion to maintain homeostasis during physiological conditions and in addition, actively terminates inflammation. We determined the signaling mechanisms used by RvD1 in cultured rat conjunctival goblet cells to increase intracellular [Ca2+] ([Ca2+]i) and induce glycoconjugate secretion. Methods: Increase in [Ca2+]i were measured using fura 2/AM and glycoconjugate secretion determined using an enzyme-linked lectin assay with the lectin Ulex Europaeus Agglutinin 1...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28890547/innate-immunity-in-tuberculosis-host-defense-vs-pathogen-evasion
#18
REVIEW
Cui Hua Liu, Haiying Liu, Baoxue Ge
The major innate immune cell types involved in tuberculosis (TB) infection are macrophages, dendritic cells (DCs), neutrophils and natural killer (NK) cells. These immune cells recognize the TB-causing pathogen Mycobacterium tuberculosis (Mtb) through various pattern recognition receptors (PRRs), including but not limited to Toll-like receptors (TLRs), Nod-like receptors (NLRs) and C-type lectin receptors (CLRs). Upon infection by Mtb, the host orchestrates multiple signaling cascades via the PRRs to launch a variety of innate immune defense functions such as phagocytosis, autophagy, apoptosis and inflammasome activation...
September 11, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28889072/the-haemocytes-of-the-colonial-aplousobranch-ascidian-diplosoma-listerianum-structural-cytochemical-and-functional-analyses
#19
Francesca Cima, Anna Peronato, Loriano Ballarin
Diplosoma listerianum is a colonial aplousobranch ascidian of the family Didemnidae that is native to the northeast Atlantic and exhibits a cosmopolitan distribution in temperate waters. It lacks a shared colonial circulation crossing the tunic, and the zooids are connected only by the common tunic. In the present study, the haemocytes of this ascidian were analysed via light and electron microscopy. Their phagocytic and enzymatic activities, staining and immunostaining properties, and lectin affinity were examined with various classical methods reconsidered and modified for small marine invertebrates...
August 30, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28888778/mincle-inhibits-neutrophils-and-macrophages-apoptosis-in-a-fumigatus-keratitis
#20
Jing Lin, Kun He, Guiqiu Zhao, Cui Li, Liting Hu, Guoqiang Zhu, Yawen Niu, Guipei Hao
PURPOSE: To determine whether macrophage inducible C-type lectin (Mincle) regulates neutrophils and macrophages apoptosis in A. fumigatus keratitis. MATERIALS AND METHODS: A murine model (C57BL/6) of fungal keratitis (AF) was established by gently scraping corneal central epithelium, smearing A. fumigatus on the epithelium surface and covering the eye with contact lenses. AF cell model was established by extracting neutrophils (PMN) and macrophages, and then infecting cells with A...
September 7, 2017: International Immunopharmacology
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