keyword
MENU ▼
Read by QxMD icon Read
search

MAIT cell

keyword
https://www.readbyqxmd.com/read/27866852/ompa-a-flexible-clamp-for-bacterial-cell-wall-attachment
#1
Firdaus Samsudin, Maite L Ortiz-Suarez, Thomas J Piggot, Peter J Bond, Syma Khalid
The envelope of Gram-negative bacteria is highly complex, containing separate outer and inner membranes and an intervening periplasmic space encompassing a peptidoglycan (PGN) cell wall. The PGN scaffold is anchored non-covalently to the outer membrane via globular OmpA-like domains of various proteins. We report atomically detailed simulations of PGN bound to OmpA in three different states, including the isolated C-terminal domain (CTD), the full-length monomer, or the complete full-length dimeric form. Comparative analysis of dynamics of OmpA CTD from different bacteria helped to identify a conserved PGN-binding mode...
November 8, 2016: Structure
https://www.readbyqxmd.com/read/27852037/placental-immune-editing-switch-pies-learning-about-immunomodulatory-pathways-from-a-unique-case-report
#2
Miguel H Bronchud, Francesc Tresserra, Wenjie Xu, Sarah Warren, Maite Cusido, Bernat Zantop, Ana Claudia Zenclussen, Alessandra Cesano
The hypothesis of this work is that, in order to escape the natural immune surveillance mechanisms, cancer cells and the surrounding microenvironment might express ectopically genes that are physiologically present in the placenta to mediate fetal immune-tolerance. These natural "placental immune-editing switch" mechanisms (PIES) may represent the result of millions of years of mammalian evolution developed to allow materno-fetal tolerance. Here, we introduce genes of the immune regulatory pathways that are either similarly over- or under-expressed in tumor vs normal tissue...
November 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27849057/cell-senescence-is-an-antiviral-defense-mechanism
#3
Maite Baz-Martínez, Sabela Da Silva-Álvarez, Estefanía Rodríguez, Jorge Guerra, Ahmed El Motiam, Anxo Vidal, Tomás García-Caballero, Miguel González-Barcia, Laura Sánchez, César Muñoz-Fontela, Manuel Collado, Carmen Rivas
Cellular senescence is often considered a protection mechanism triggered by conditions that impose cellular stress. Continuous proliferation, DNA damaging agents or activated oncogenes are well-known activators of cell senescence. Apart from a characteristic stable cell cycle arrest, this response also involves a proinflammatory phenotype known as senescence-associated secretory phenotype (SASP). This, together with the widely known interference with senescence pathways by some oncoviruses, had led to the hypothesis that senescence may also be part of the host cell response to fight virus...
November 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27821737/quasimodo-mediates-daily-and-acute-light-effects-on-drosophila-clock-neuron-excitability
#4
Edgar Buhl, Adam Bradlaugh, Maite Ogueta, Ko-Fan Chen, Ralf Stanewsky, James J L Hodge
We have characterized a light-input pathway regulating Drosophila clock neuron excitability. The molecular clock drives rhythmic electrical excitability of clock neurons, and we show that the recently discovered light-input factor Quasimodo (Qsm) regulates this variation, presumably via an Na(+), K(+), Cl(-) cotransporter (NKCC) and the Shaw K(+) channel (dKV3.1). Because of light-dependent degradation of the clock protein Timeless (Tim), constant illumination (LL) leads to a breakdown of molecular and behavioral rhythms...
November 22, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27799620/mait-cells-promote-inflammatory-monocyte-differentiation-into-dendritic-cells-during-pulmonary-intracellular-infection
#5
Anda I Meierovics, Siobhán C Cowley
Mucosa-associated invariant T (MAIT) cells are a unique innate T cell subset that is necessary for rapid recruitment of activated CD4(+) T cells to the lungs after pulmonary F. tularensis LVS infection. Here, we investigated the mechanisms behind this effect. We provide evidence to show that MAIT cells promote early differentiation of CCR2-dependent monocytes into monocyte-derived DCs (Mo-DCs) in the lungs after F. tularensis LVS pulmonary infection. Adoptive transfer of Mo-DCs to MAIT cell-deficient mice (MR1(-/-) mice) rescued their defect in the recruitment of activated CD4(+) T cells to the lungs...
November 14, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27796716/association-of-breast-cancer-risk-in-brca1-and-brca2-mutation-carriers-with-genetic-variants-showing-differential-allelic-expression-identification-of-a-modifier-of-breast-cancer-risk-at-locus-11q22-3
#6
Yosr Hamdi, Penny Soucy, Karoline B Kuchenbaeker, Tomi Pastinen, Arnaud Droit, Audrey Lemaçon, Julian Adlard, Kristiina Aittomäki, Irene L Andrulis, Adalgeir Arason, Norbert Arnold, Banu K Arun, Jacopo Azzollini, Anita Bane, Laure Barjhoux, Daniel Barrowdale, Javier Benitez, Pascaline Berthet, Marinus J Blok, Kristie Bobolis, Valérie Bonadona, Bernardo Bonanni, Angela R Bradbury, Carole Brewer, Bruno Buecher, Saundra S Buys, Maria A Caligo, Jocelyne Chiquette, Wendy K Chung, Kathleen B M Claes, Mary B Daly, Francesca Damiola, Rosemarie Davidson, Miguel De la Hoya, Kim De Leeneer, Orland Diez, Yuan Chun Ding, Riccardo Dolcetti, Susan M Domchek, Cecilia M Dorfling, Diana Eccles, Ros Eeles, Zakaria Einbeigi, Bent Ejlertsen, Christoph Engel, D Gareth Evans, Lidia Feliubadalo, Lenka Foretova, Florentia Fostira, William D Foulkes, George Fountzilas, Eitan Friedman, Debra Frost, Pamela Ganschow, Patricia A Ganz, Judy Garber, Simon A Gayther, Anne-Marie Gerdes, Gord Glendon, Andrew K Godwin, David E Goldgar, Mark H Greene, Jacek Gronwald, Eric Hahnen, Ute Hamann, Thomas V O Hansen, Steven Hart, John L Hays, Frans B L Hogervorst, Peter J Hulick, Evgeny N Imyanitov, Claudine Isaacs, Louise Izatt, Anna Jakubowska, Paul James, Ramunas Janavicius, Uffe Birk Jensen, Esther M John, Vijai Joseph, Walter Just, Katarzyna Kaczmarek, Beth Y Karlan, Carolien M Kets, Judy Kirk, Mieke Kriege, Yael Laitman, Maïté Laurent, Conxi Lazaro, Goska Leslie, Jenny Lester, Fabienne Lesueur, Annelie Liljegren, Niklas Loman, Jennifer T Loud, Siranoush Manoukian, Milena Mariani, Sylvie Mazoyer, Lesley McGuffog, Hanne E J Meijers-Heijboer, Alfons Meindl, Austin Miller, Marco Montagna, Anna Marie Mulligan, Katherine L Nathanson, Susan L Neuhausen, Heli Nevanlinna, Robert L Nussbaum, Edith Olah, Olufunmilayo I Olopade, Kai-Ren Ong, Jan C Oosterwijk, Ana Osorio, Laura Papi, Sue Kyung Park, Inge Sokilde Pedersen, Bernard Peissel, Pedro Perez Segura, Paolo Peterlongo, Catherine M Phelan, Paolo Radice, Johanna Rantala, Christine Rappaport-Fuerhauser, Gad Rennert, Andrea Richardson, Mark Robson, Gustavo C Rodriguez, Matti A Rookus, Rita Katharina Schmutzler, Nicolas Sevenet, Payal D Shah, Christian F Singer, Thomas P Slavin, Katie Snape, Johanna Sokolowska, Ida Marie Heeholm Sønderstrup, Melissa Southey, Amanda B Spurdle, Zsofia Stadler, Dominique Stoppa-Lyonnet, Grzegorz Sukiennicki, Christian Sutter, Yen Tan, Muy-Kheng Tea, Manuel R Teixeira, Alex Teulé, Soo-Hwang Teo, Mary Beth Terry, Mads Thomassen, Laima Tihomirova, Marc Tischkowitz, Silvia Tognazzo, Amanda Ewart Toland, Nadine Tung, Ans M W van den Ouweland, Rob B van der Luijt, Klaartje van Engelen, Elizabeth J van Rensburg, Raymonda Varon-Mateeva, Barbara Wappenschmidt, Juul T Wijnen, Timothy Rebbeck, Georgia Chenevix-Trench, Kenneth Offit, Fergus J Couch, Silje Nord, Douglas F Easton, Antonis C Antoniou, Jacques Simard
PURPOSE: Cis-acting regulatory SNPs resulting in differential allelic expression (DAE) may, in part, explain the underlying phenotypic variation associated with many complex diseases. To investigate whether common variants associated with DAE were involved in breast cancer susceptibility among BRCA1 and BRCA2 mutation carriers, a list of 175 genes was developed based of their involvement in cancer-related pathways. METHODS: Using data from a genome-wide map of SNPs associated with allelic expression, we assessed the association of ~320 SNPs located in the vicinity of these genes with breast and ovarian cancer risks in 15,252 BRCA1 and 8211 BRCA2 mutation carriers ascertained from 54 studies participating in the Consortium of Investigators of Modifiers of BRCA1/2...
October 28, 2016: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/27787804/extensive-phenotypic-analysis-transcription-factor-profiling-and-effector-cytokine-production-of-human-mait-cells-by-flow-cytometry
#7
Joana Dias, Johan K Sandberg, Edwin Leeansyah
The mucosa-associated invariant T (MAIT) cells are a large and relatively recently described innate-like antimicrobial T cell subset in humans. The study of human MAIT cells is still in its infancy, and many aspects of MAIT cell immunobiology in health and disease remain unexplored. Here, we describe methodological approaches and protocols to investigate the expression of a broad spectrum of surface receptors on human MAIT cells, and to examine their unique transcription factor profile, as well as their antimicrobial effector function using multicolor flow cytometry-based techniques...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27760760/dr3-signaling-modulates-the-function-of-foxp3-regulatory-t-cells-and-the-severity-of-acute-graft-versus-host-disease
#8
Hidekazu Nishikii, Byung-Su Kim, Yasuhisa Yokoyama, Yan Chen, Jeanette Baker, Antonio Pierini, Maite Alvarez, Melissa Mavers, Kristina Maas-Bauer, Yuqiong Pan, Shigeru Chiba, Robert S Negrin
CD4(+)Foxp3(+) regulatory T cells (Treg) are a subpopulation of T cells, which regulate the immune system and enhance immune tolerance after transplantation. Donor-derived Treg prevent the development of lethal acute graft versus host disease (GVHD) in murine models of allogeneic hematopoietic stem cell transplantation (HCT). We recently demonstrated that a single treatment of the agonistic antibody to DR3 (Death receptor 3, αDR3) to donor mice resulted in the expansion of donor derived Treg and prevented acute GVHD, although the precise role of DR3 signaling in GVHD has not been elucidated...
October 19, 2016: Blood
https://www.readbyqxmd.com/read/27760356/full-length-ompa-structure-function-and-membrane-interactions-predicted-by-molecular-dynamics-simulations
#9
Maite L Ortiz-Suarez, Firdaus Samsudin, Thomas J Piggot, Peter J Bond, Syma Khalid
OmpA is a multidomain protein found in the outer membranes of most Gram-negative bacteria. Despite a wealth of reported structural and biophysical studies, the structure-function relationships of this protein remain unclear. For example, it is still debated whether it functions as a pore, and the precise molecular role it plays in attachment to the peptidoglycan of the periplasm is unknown. The absence of a consensus view is partly due to the lack of a complete structure of the full-length protein. To address this issue, we performed molecular-dynamics simulations of the full-length model of the OmpA dimer proposed by Robinson and co-workers...
October 18, 2016: Biophysical Journal
https://www.readbyqxmd.com/read/27760106/how-mait-cells-get-their-start
#10
Haiguang Wang, Kristin A Hogquist
No abstract text is available yet for this article.
October 19, 2016: Nature Immunology
https://www.readbyqxmd.com/read/27759023/mr1-restricted-mucosal-associated-invariant-t-mait-cells-respond-to-mycobacterial-vaccination-and-infection-in-nonhuman-primates
#11
J M Greene, P Dash, S Roy, C McMurtrey, W Awad, J S Reed, K B Hammond, S Abdulhaqq, H L Wu, B J Burwitz, B F Roth, D W Morrow, J C Ford, G Xu, J Y Bae, H Crank, A W Legasse, T H Dang, H Y Greenaway, M Kurniawan, M C Gold, M J Harriff, D A Lewinsohn, B S Park, M K Axthelm, J J Stanton, S G Hansen, L J Picker, V Venturi, W Hildebrand, P G Thomas, D M Lewinsohn, E J Adams, J B Sacha
Studies on mucosal-associated invariant T cells (MAITs) in nonhuman primates (NHP), a physiologically relevant model of human immunity, are handicapped due to a lack of macaque MAIT-specific reagents. Here we show that while MR1 ligand-contact residues are conserved between human and multiple NHP species, three T-cell receptor contact-residue mutations in NHP MR1 diminish binding of human MR1 tetramers to macaque MAITs. Construction of naturally loaded macaque MR1 tetramers facilitated identification and characterization of macaque MR1-binding ligands and MAITs, both of which mirrored their human counterparts...
October 19, 2016: Mucosal Immunology
https://www.readbyqxmd.com/read/27736003/arabinogalactan-proteins-from-baobab-and-acacia-seeds-influence-innate-immunity-of-human-keratinocytes-in-vitro
#12
Abderrakib Zahid, Julie Despres, Magalie Benard, Eric Nguema-Ona, Jerome Leprince, David Vaudry, Christophe Rihouey, Maité Vicré-Gibouin, Azeddine Driouich, Marie-Laure Follet-Gueye
Plant derived arabinogalactan proteins (AGP) were repeatedly confirmed as immunologically as well as dermatologically active compounds. However little is currently known regarding their potential activity towards skin innate immunity. Here, we extracted and purified AGP from acacia (Acacia senegal) and baobab (Adansonia digitata) seeds to investigate their biological effects on the HaCaT keratinocyte cell line in an in vitro system. While AGP from both sources did not exhibit any cytotoxic effect, AGP from acacia seeds enhanced cell viability Moreover, real-time quantitative reverse transcription-polymerase chain reaction (qRT-PCR) analysis showed that AGP extracted from both species induced a substantial overexpression of hBD-2, TLR-5, and IL1-α genes...
October 13, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27733850/new-genes-involved-in-osmotic-stress-tolerance-in-saccharomyces-cerevisiae
#13
Ramon Gonzalez, Pilar Morales, Jordi Tronchoni, Gustavo Cordero-Bueso, Enrico Vaudano, Manuel Quirós, Maite Novo, Rafael Torres-Pérez, Eva Valero
Adaptation to changes in osmolarity is fundamental for the survival of living cells, and has implications in food and industrial biotechnology. It has been extensively studied in the yeast Saccharomyces cerevisiae, where the Hog1 stress activated protein kinase was discovered about 20 years ago. Hog1 is the core of the intracellular signaling pathway that governs the adaptive response to osmotic stress in this species. The main endpoint of this program is synthesis and intracellular retention of glycerol, as a compatible osmolyte...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27726141/back-cover-story-eur-j-immunol-10-16
#14
(no author information available yet)
Our back cover features an immunofluorescence staining for TCR Vα7.2 on both the surface and the cytoplasm of the T lymphocytes (red) in human tonsil. The image is taken from article by Wang et al. (pp. 2409-2419), in which the authors show that Vα7.2(+) mucosa- associated invariant T (MAIT) cells are numerically and functionally altered in peripheral blood (PB) of primary Sjögren's syndrome (pSS) patients. The reduction of MAIT cells in PB might be partially due to migration into the target tissue, as supported by MAIT cells detected in the salivary gland tissue from pSS patients, but not in controls...
October 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27707888/hydrocarbons-are-essential-for-optimal-cell-size-division-and-growth-of-cyanobacteria
#15
David J Lea-Smith, Maite L Ortiz-Suarez, Tchern Lenn, Dennis J Nurnberg, Laura L Baers, Matthew P Davey, Lucia Parolini, Roland G Huber, Charles A R Cotton, Giulia Mastroianni, Paolo Bombelli, Petra Ungerer, Tim J Stevens, Alison G Smith, Peter J Bond, Conrad W Mullineaux, Christopher J Howe
Cyanobacteria are intricately organized, incorporating an array of internal thylakoid membranes, the site of photosynthesis, into cells no larger than other bacteria. They also synthesize C15-C19 alkanes and alkenes, which results in substantial production of hydrocarbons in the environment. All sequenced cyanobacteria encode hydrocarbon biosynthesis pathways, suggesting an important, undefined physiological role for these compounds. Here we demonstrate that hydrocarbon deficient mutants of Synechococcus sp...
October 5, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27668799/a-three-stage-intrathymic-development-pathway-for-the-mucosal-associated-invariant-t-cell-lineage
#16
Hui-Fern Koay, Nicholas A Gherardin, Anselm Enders, Liyen Loh, Laura K Mackay, Catarina F Almeida, Brendan E Russ, Claudia A Nold-Petry, Marcel F Nold, Sammy Bedoui, Zhenjun Chen, Alexandra J Corbett, Sidonia B G Eckle, Bronwyn Meehan, Yves d'Udekem, Igor E Konstantinov, Martha Lappas, Ligong Liu, Chris C Goodnow, David P Fairlie, Jamie Rossjohn, Mark M Chong, Katherine Kedzierska, Stuart P Berzins, Gabrielle T Belz, James McCluskey, Adam P Uldrich, Dale I Godfrey, Daniel G Pellicci
Mucosal-associated invariant T cells (MAIT cells) detect microbial vitamin B2 derivatives presented by the antigen-presenting molecule MR1. Here we defined three developmental stages and checkpoints for the MAIT cell lineage in humans and mice. Stage 1 and stage 2 MAIT cells predominated in thymus, while stage 3 cells progressively increased in abundance extrathymically. Transition through each checkpoint was regulated by MR1, whereas the final checkpoint that generated mature functional MAIT cells was controlled by multiple factors, including the transcription factor PLZF and microbial colonization...
September 26, 2016: Nature Immunology
https://www.readbyqxmd.com/read/27659931/effect-of-balance-solution-on-the-peritoneal-membrane-in-automated-peritoneal-dialysis
#17
Tatiana De Los Ríos, Juan Pérez-Martínez, Jose Portoles, Monika Lichodziejewska-Niemierko, Maite Rivera, Michał Nowicki, Andrzej Książek, Ana María Tato, Christine Bohnhorst, Mariano Feriani
Interference of conventional peritoneal dialysis fluids (cPDFs) with peritoneal membrane cell functions may be attributed to the dialysis fluid's low pH, high glucose concentration, and/or the presence of glucose degradation products (GDPs), the last of which leads to higher levels of advanced glycation end-products (AGEs). It has been suggested that the peritoneal membrane might be better preserved by using biocompatible solutions, including cancer antigetn 125 (CA125). This prospective, open-label, multicentre, randomized, controlled, cross-over phase IV study compared the in vivo biocompatibility of a neutral-pH, low-GDP peritoneal dialysis (PD) solution (balance) with a cPDF in automated PD (APD) patients...
September 2016: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/27633333/the-role-of-mucosal-associated-invariant-t-cells-in-infectious-diseases
#18
REVIEW
Emily B Wong, Thumbi Ndung'u, Victoria O Kasprowicz
Mucosal-associated invariant T (MAIT) cells are donor-unrestricted lymphocytes that are surprisingly abundant in humans, representing 1-10% of circulating T cells and further enriched in mucosal tissues. MAIT cells recognize and are activated by small molecule ligands produced by microbes and presented by MR1, a highly conserved MHC-related antigen-presenting protein that is ubiquitously expressed in human cells. Increasing evidence suggests that MAIT cells play a protective role in anti-bacterial immunity at mucosal interfaces...
January 2017: Immunology
https://www.readbyqxmd.com/read/27588203/mait-cells-new-guardians-of-the-liver
#19
REVIEW
Ayako Kurioka, Lucy J Walker, Paul Klenerman, Christian B Willberg
The liver is an important immunological organ that remains sterile and tolerogenic in homeostasis, despite continual exposure to non-self food and microbial-derived products from the gut. However, where intestinal mucosal defenses are breached or in the presence of a systemic infection, the liver acts as a second 'firewall', because of its enrichment with innate effector cells able to rapidly respond to infections or tissue dysregulation. One of the largest populations of T cells within the human liver are mucosal-associated invariant T (MAIT) cells, a novel innate-like T-cell population that can recognize a highly conserved antigen derived from the microbial riboflavin synthesis pathway...
August 2016: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/27586092/enhanced-immune-response-of-mait-cells-in-tuberculous-pleural-effusions-depends-on-cytokine-signaling
#20
Jing Jiang, Xinchun Chen, Hongjuan An, Bingfen Yang, Fuping Zhang, Xiaoxing Cheng
The functions of MAIT cells at the site of Mycobacterium tuberculosis infection in humans are still largely unknown. In this study, the phenotypes and immune response of MAIT cells from tuberculous pleural effusions and peripheral blood were investigated. MAIT cells in tuberculous pleural effusions had greatly enhanced IFN-γ, IL-17F and granzyme B response compared with those in peripheral blood. The level of IFN-γ response in MAIT cells from tuberculous pleural effusions was inversely correlated with the extent of tuberculosis infection (p = 0...
2016: Scientific Reports
keyword
keyword
18374
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"