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https://www.readbyqxmd.com/read/28202166/m1-macrophage-triggered-by-mincle-leads-to-a-deterioration-of-acute-kidney-injury
#1
Tsuyoshi Inoue
In the early stage of acute kidney injury, M1 macrophages are proinflammatory and destructive. In this study, Lv et al. reveal that Mincle (macrophage-inducible C-type lectin, Clec4e) is expressed on M1 macrophages in acute kidney injury, and the kidney is protected in a murine model of cisplatin-induced renal injury by inhibiting Mincle expression on macrophages. Mincle expression is regulated by Toll-like receptor 4/nuclear factor κB signaling, and Mincle maintains the inflammatory phenotype through spleen tyrosine kinase signaling, leading to acute kidney injury...
March 2017: Kidney International
https://www.readbyqxmd.com/read/28186242/mincle-regulates-autophagy-to-control-neutrophil-extracellular-trap-formation
#2
Atul Sharma, Tanner J Simonson, Christopher N Jondle, Bibhuti B Mishra, Jyotika Sharma
No abstract text is available yet for this article.
February 10, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28141595/the-role-of-mincle-in-innate-immune-to-fungal-keratitis
#3
Guiqiu Zhao, Qiang Xu, Jing Lin, Wenjun Chen, Tingting Cui, Liting Hu, Nan Jiang
INTRODUCTION: This study aimed to detect the early expression of macrophage-inducible C-type lectin (Mincle) and investigate its role in the innate immune response of fungal keratitis (FK). METHODOLOGY: Wistar rats were used to make fungal keratitis models. The inflammatory responses and corneal lesions were observed by slit-lamp microscope.RT-PCR, immunohistochemistry, and immunofluorescence were used to detect the expression of Mincle in the rat corneal epithelium...
January 30, 2017: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28112221/mincle-activation-enhances-neutrophil-migration-and-resistance-to-polymicrobial-septic-peritonitis
#4
Wook-Bin Lee, Ji-Jing Yan, Ji-Seon Kang, Quanri Zhang, Won Young Choi, Lark Kyun Kim, Young-Joon Kim
Sepsis is a systemic inflammatory response to bacterial infection. The therapeutic options for treating sepsis are limited. Impaired neutrophil recruitment into the infection site is directly associated with severe sepsis, but the precise mechanism is unclear. Here, we show that Mincle plays a key role in neutrophil migration and resistance during polymicrobial sepsis. Mincle-deficient mice exhibited lower survival rates in experimental sepsis from cecal ligation and puncture and Escherichia coli-induced peritonitis...
January 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28095348/immune-transcriptome-reveals-the-mincle-c-type-lectin-receptor-acts-as-a-partial-replacement-for-tlr4-in-lipopolysaccharide-mediated-inflammatory-response-in-barramundi-lates-calcarifer
#5
Emmanuelle Zoccola, Stuart Kellie, Andrew C Barnes
Fish represent the most diverse and abundant extant vertebrate infraclass. They are also one of the earliest divergent phyla with adaptive immunity based on antigen recognition by MHC and immunoglobulin. The aquaculture industry, which currently provides more than half of the fish for human consumption globally, has successfully exploited the adaptive immune system of fish through mass vaccination programs. However, vaccination against highly diverse antigens, mostly carbohydrates, such as capsular polysaccharides and lipopolysaccharide (LPS) is challenging...
March 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28017324/the-pattern-recognition-receptor-mincle-is-essential-for-maintaining-the-m1-macrophage-phenotype-in-acute-renal-inflammation
#6
Lin L Lv, Patrick Ming-Kuen Tang, Chun J Li, Yong K You, Jinhong Li, Xiao-Ru Huang, Jun Ni, Min Feng, Bi C Liu, Hui-Yao Lan
Mincle (macrophage-inducible C-type lectin, Clec4e) is a transmembrane pattern recognition receptor involving the innate immunity, but its role in kidney disease is still unexplored. In the obstructed kidney of the unilateral ureteral obstruction model of renal injury, Mincle was specifically detected in the infiltrating M1 macrophages (CD68(+)iNOS(+) cells) on day one but was rapidly reduced following reduction of M1 macrophages during the progression of kidney injury. Interestingly, Mincle-expressing macrophages were progressively increased in the cisplatin-induced acute kidney injury model, where iNOS expression was detected in the CD68(+) cells following Mincle induction...
December 22, 2016: Kidney International
https://www.readbyqxmd.com/read/27999992/c-type-lectins-their-network-and-roles-in-pathogen-recognition-and-immunity
#7
REVIEW
Sabine Mayer, Marie-Kristin Raulf, Bernd Lepenies
C-type lectins (CTLs) represent the most complex family of animal/human lectins that comprises 17 different groups. During evolution, CTLs have developed by diversification to cover a broad range of glycan ligands. However, ligand binding by CTLs is not necessarily restricted to glycans as some CTLs also bind to proteins, lipids, inorganic molecules, or ice crystals. CTLs share a common fold that harbors a Ca(2+) for contact to the sugar and about 18 invariant residues in a phylogenetically conserved pattern...
February 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/27988097/parasites-dampen-dendritic-cell-activation-to-ensure-their-survival
#8
Esther von Stebut
Dendritic cells (DCs) are critical for induction of protective immunity against Leishmania major. However, DC activation occurs only several weeks after parasite transmission. Parasites synthesize a macrophage-inducible C-type lectin (Mincle) ligand. Engagement of Mincle by the parasite ligand dampens DC activation, thus delaying induction of interferon-γ-producing T cells responsible for parasite eradication.
February 2017: Trends in Parasitology
https://www.readbyqxmd.com/read/27926862/vav-proteins-are-key-regulators-of-card9-signaling-for-innate-antifungal-immunity
#9
Susanne Roth, Hanna Bergmann, Martin Jaeger, Assa Yeroslaviz, Konstantin Neumann, Paul-Albert Koenig, Clarissa Prazeres da Costa, Lesley Vanes, Vinod Kumar, Melissa Johnson, Mauricio Menacho-Márquez, Bianca Habermann, Victor L Tybulewicz, Mihai Netea, Xosé R Bustelo, Jürgen Ruland
Fungal infections are major causes of morbidity and mortality, especially in immunocompromised individuals. The innate immune system senses fungal pathogens through Syk-coupled C-type lectin receptors (CLRs), which signal through the conserved immune adaptor Card9. Although Card9 is essential for antifungal defense, the mechanisms that couple CLR-proximal events to Card9 control are not well defined. Here, we identify Vav proteins as key activators of the Card9 pathway. Vav1, Vav2, and Vav3 cooperate downstream of Dectin-1, Dectin-2, and Mincle to engage Card9 for NF-κB control and proinflammatory gene transcription...
December 6, 2016: Cell Reports
https://www.readbyqxmd.com/read/27923071/c-type-lectin-mincle-recognizes-glucosyl-diacylglycerol-of-streptococcus-pneumoniae-and-plays-a-protective-role-in-pneumococcal-pneumonia
#10
Friederike Behler-Janbeck, Tomotsugu Takano, Regina Maus, Jennifer Stolper, Danny Jonigk, Meritxell Tort Tarrés, Thomas Fuehner, Antje Prasse, Tobias Welte, Mattie S M Timmer, Bridget L Stocker, Yoichi Nakanishi, Tomofumi Miyamoto, Sho Yamasaki, Ulrich A Maus
Among various innate immune receptor families, the role of C-type lectin receptors (CLRs) in lung protective immunity against Streptococcus pneumoniae (S. pneumoniae) is not fully defined. We here show that Mincle gene expression was induced in alveolar macrophages and neutrophils in bronchoalveolar lavage fluids of mice and patients with pneumococcal pneumonia. Moreover, S. pneumoniae directly triggered Mincle reporter cell activation in vitro via its glycolipid glucosyl-diacylglycerol (Glc-DAG), which was identified as the ligand recognized by Mincle...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27855374/inflammatory-properties-and-adjuvant-potential-of-synthetic-glycolipids-homologous-to-mycolate-esters-of-the-cell-wall-of-mycobacterium-tuberculosis
#11
Hermann Giresse Tima, Juma''a Raheem Al Dulayymi, Olivier Denis, Pauline Lehebel, Klarah Sherzad Baols, Mohsin Omar Mohammed, Laurent L'Homme, Mohaned Mohammed Sahb, Georges Potemberg, Sylvie Legrand, Roland Lang, Rudi Beyaert, Jacques Piette, Mark Stephen Baird, Kris Huygen, Marta Romano
The cell wall of mycobacteria is characterised by glycolipids composed of different classes of mycolic acids (MAs; alpha-, keto-, and methoxy-) and sugars (trehalose, glucose, and arabinose). Studies using mutant Mtb strains have shown that the structure of MAs influences the inflammatory potential of these glycolipids. As mutant Mtb strains possess a complex mixture of glycolipids, we analysed the inflammatory potential of single classes of mycolate esters of the Mtb cell wall using 38 different synthetic analogues...
November 18, 2016: Journal of Innate Immunity
https://www.readbyqxmd.com/read/27845194/human-albumin-attenuates-excessive-innate-immunity-via-inhibition-of-microglial-mincle-syk-signaling-in-subarachnoid-hemorrhage
#12
Yi Xie, Hongquan Guo, Liumin Wang, Lili Xu, Xiaohao Zhang, Linjie Yu, Qian Liu, Yunzi Li, Nana Zhao, Nan Zhao, Ruidong Ye, Xinfeng Liu
Subarachnoid hemorrhage (SAH) is a devastating subtype of stroke. Microglial macrophage-inducible C-type lectin (Mincle) receptor launches microglial innate immunity after SAH, and thereby achieves a key step of early cerebral injury in SAH. We previously revealed albumin could improve long-term neurological outcomes after SAH. In this study, we examined the role of microglia-mediated innate immunity in the salutary effects of albumin. SAH was induced by endovascular perforation in rats. We found that albumin can significantly mitigate early neurovascular dysfunction of SAH rats...
February 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27790218/stat6-dependent-inhibition-of-mincle-expression-in-mouse-and-human-antigen-presenting-cells-by-the-th2-cytokine-il-4
#13
Thomas Hupfer, Judith Schick, Katrin Jozefowski, David Voehringer, Jenny Ostrop, Roland Lang
The C-type lectin receptors (CLRs) Mincle, Mcl, and Dectin-2 bind mycobacterial and fungal cell wall glycolipids and carbohydrates. Recently, we described that expression of these CLR is downregulated during differentiation of human monocytes to dendritic cells (DC) in the presence of GM-CSF and IL-4. Here, we demonstrate that the Th2 cytokine IL-4 specifically inhibits expression of Mincle, Mcl, and Dectin-2 in human antigen-presenting cells (APC). This inhibitory effect of IL-4 was observed across species, as murine macrophages and DC treated with IL-4 also downregulated these receptors...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27780012/lectin-receptors-expressed-on-myeloid-cells
#14
Gordon D Brown, Paul R Crocker
Lectins recognize a diverse array of carbohydrate structures and perform numerous essential biological functions. Here we focus on only two families of lectins, the Siglecs and C-type lectins. Triggering of intracellular signaling cascades following ligand recognition by these receptors can have profound effects on the induction and modulation of immunity. In this chapter, we provide a brief overview of each family and then focus on selected examples that highlight how these lectins can influence myeloid cell functioning in health and disease...
October 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27743706/cord-factor-as-an-invisibility-cloak-a-hypothesis-for-asymptomatic-tb-persistence
#15
Robert L Hunter, Shen-An Hwang, Chinnaswamy Jagannath, Jeffrey K Actor
Mycobacterium tuberculosis (MTB) has long been known to persist in grossly normal tissues even in people with active lesions and granulomas in other parts of the body. We recently reported that post-primary TB begins as an asymptomatic infection that slowly progresses, accumulating materials for a massive necrotizing reaction that results in cavitation. This paper explores the possible roles of trehalose 6,6' dimycolate (TDM) or cord factor in the ability of MTB to persist in such lesions without producing inflammation...
December 2016: Tuberculosis
https://www.readbyqxmd.com/read/27742545/leishmania-uses-mincle-to-target-an-inhibitory-itam-signaling-pathway-in-dendritic-cells-that-dampens-adaptive-immunity-to-infection
#16
Salvador Iborra, María Martínez-López, Francisco J Cueto, Ruth Conde-Garrosa, Carlos Del Fresno, Helena M Izquierdo, Clare L Abram, Daiki Mori, Yolanda Campos-Martín, Rosa María Reguera, Benjamin Kemp, Sho Yamasaki, Matthew J Robinson, Manuel Soto, Clifford A Lowell, David Sancho
C-type lectin receptors sense a diversity of endogenous and exogenous ligands that may trigger differential responses. Here, we have found that human and mouse Mincle bind to a ligand released by Leishmania, a eukaryote parasite that evades an effective immune response. Mincle-deficient mice had milder dermal pathology and a tenth of the parasite burden compared to wild-type mice after Leishmania major intradermal ear infection. Mincle deficiency enhanced adaptive immunity against the parasite, correlating with increased activation, migration, and priming by Mincle-deficient dendritic cells (DCs)...
October 18, 2016: Immunity
https://www.readbyqxmd.com/read/27714279/lipid-structure-influences-the-ability-of-glucose-monocorynomycolate-to-signal-through-mincle
#17
Phillip L van der Peet, Masahiro Nagata, Sayali Shah, Jonathan M White, Sho Yamasaki, Spencer J Williams
Mincle (macrophage-inducible C-type lectin) is a C-type lectin receptor that provides the capacity for immune sensing of a range of pathogen- and commensal-derived glycolipids. Mincle can recognize mycolic and/or corynomycolic acid esters of trehalose, glycerol and glucose from mycobacteria and corynebacteria. While simple straight-chain long fatty acids (e.g. behenic acid) can substitute for mycolic acid on trehalose and glycerol and maintain robust signalling through Mincle, glucose monobehenate has been reported to be much less active than glucose monocorynomycolate (GMCM)...
October 4, 2016: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/27628766/irakm-mincle-axis-links-cell-death-to-inflammation-pathophysiological-implications-for-chronic-alcoholic-liver-disease
#18
Hao Zhou, Minjia Yu, Junjie Zhao, Bradley N Martin, Sanjoy Roychowdhury, Megan R McMullen, Emily Wang, Paul L Fox, Sho Yamasaki, Laura E Nagy, Xiaoxia Li
: Lipopolysaccharide (LPS)-mediated activation of Toll-like receptors (TLRs) in hepatic macrophages and injury to hepatocytes are major contributors to the pathogenesis of alcoholic liver disease. However, the mechanisms by which TLR-dependent inflammatory responses and alcohol-induced hepatocellular damage coordinately lead to alcoholic liver disease are not completely understood. In this study, we found that mice deficient in interleukin-1 receptor-associated kinase M (IRAKM), a proximal TLR pathway molecule typically associated with inhibition of TLR signaling, were actually protected from chronic ethanol-induced liver injury...
December 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27559045/mincle-signaling-promotes-con-a-hepatitis
#19
Stephanie H Greco, Alejandro Torres-Hernandez, Aleksandr Kalabin, Clint Whiteman, Rae Rokosh, Sushma Ravirala, Atsuo Ochi, Johana Gutierrez, Muhammad Atif Salyana, Vishnu R Mani, Savitha V Nagaraj, Michael Deutsch, Lena Seifert, Donnele Daley, Rocky Barilla, Mautin Hundeyin, Yuriy Nikifrov, Karla Tejada, Bruce E Gelb, Steven C Katz, George Miller
Con A hepatitis is regarded as a T cell-mediated model of acute liver injury. Mincle is a C-type lectin receptor that is critical in the immune response to mycobacteria and fungi but does not have a well-defined role in preclinical models of non-pathogen-mediated inflammation. Because Mincle can ligate the cell death ligand SAP130, we postulated that Mincle signaling drives intrahepatic inflammation and liver injury in Con A hepatitis. Acute liver injury was assessed in the murine Con A hepatitis model using C57BL/6, Mincle(-/-), and Dectin-1(-/-) mice...
October 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27542410/binding-sites-for-acylated-trehalose-analogs-of-glycolipid-ligands-on-an-extended-carbohydrate-recognition-domain-of-the-macrophage-receptor-mincle
#20
Hadar Feinberg, Neela D S Rambaruth, Sabine A F Jégouzo, Kristian M Jacobsen, Rasmus Djurhuus, Thomas B Poulsen, William I Weis, Maureen E Taylor, Kurt Drickamer
The macrophage receptor mincle binds to trehalose dimycolate on the surface of Mycobacterium tuberculosis Signaling initiated by this interaction leads to cytokine production, which underlies the ability of mycobacteria to evade the immune system and also to function as adjuvants. In previous work the mechanism for binding of the sugar headgroup of trehalose dimycolate to mincle has been elucidated, but the basis for enhanced binding to glycolipid ligands, in which hydrophobic substituents are attached to the 6-hydroxyl groups, has been the subject of speculation...
September 30, 2016: Journal of Biological Chemistry
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