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https://www.readbyqxmd.com/read/29144503/mait-cells-in-type-1-diabetes-a-good-friend-turned-bad
#1
Lina Petersone, Lucy S K Walker
No abstract text is available yet for this article.
November 16, 2017: Nature Immunology
https://www.readbyqxmd.com/read/29119385/intestinal-permeabiliy-in-relapsing-remitting-multiple-sclerosis
#2
REVIEW
M C Buscarinu, S Romano, R Mechelli, R Pizzolato Umeton, M Ferraldeschi, A Fornasiero, R Reniè, B Cerasoli, E Morena, C Romano, N D Loizzo, R Umeton, M Salvetti, G Ristori
Changes of intestinal permeability (IP) have been extensively investigated in inflammatory bowel diseases (IBD) and celiac disease (CD), underpinned by a known unbalance between microbiota, IP and immune responses in the gut. Recently the influence of IP on brain function has greatly been appreciated. Previous works showed an increased IP that preceded experimental autoimmune encephalomyelitis development and worsened during disease with disruption of TJ. Moreover, studying co-morbidity between Crohn's disease and MS, a report described increased IP in a minority of cases with MS...
November 8, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29106304/role-of-mait-cells-in-the-immunopathogenesis-of-inflammatory-diseases-new-players-in-old-game
#3
Vijay Kumar, Ali Ahmad
Current advances in immunology have led to the identification of a population of novel innate immune T cells, called mucosa-associated invariant T (MAIT) cells. The cells in humans express an invariant TCRα chain (Vα7.2-Jα33) paired with a limited subset of TCRβ chains (Vβ2, 13 and 22), are restricted by the MHC class I (MH1)-related (MR)-1, and recognize molecules that are produced in the bacterial riboflavin (vitamin B2) biosynthetic pathway. They are present in the circulation, liver and at various mucosal sites (i...
November 6, 2017: International Reviews of Immunology
https://www.readbyqxmd.com/read/29097439/mucosa-associated-invariant-t-cells-link-intestinal-immunity-with-antibacterial-immune-defects-in-alcoholic-liver-disease
#4
Antonio Riva, Vishal Patel, Ayako Kurioka, Hannah C Jeffery, Gavin Wright, Sarah Tarff, Debbie Shawcross, Jennifer M Ryan, Alexander Evans, Sarah Azarian, Jasmohan S Bajaj, Andrew Fagan, Vinood Patel, Kosha Mehta, Carlos Lopez, Marieta Simonova, Krum Katzarov, Tanya Hadzhiolova, Slava Pavlova, Julia A Wendon, Ye Htun Oo, Paul Klenerman, Roger Williams, Shilpa Chokshi
BACKGROUND/AIMS: Intestinal permeability with systemic distribution of bacterial products are central in the immunopathogenesis of alcoholic liver disease (ALD), yet links with intestinal immunity remain elusive. Mucosa-associated invariant T cells (MAIT) are found in liver, blood and intestinal mucosa and are a key component of antibacterial host defences. Their role in ALD is unknown. METHODS/DESIGN: We analysed frequency, phenotype, transcriptional regulation and function of blood MAIT cells in severe alcoholic hepatitis (SAH), alcohol-related cirrhosis (ARC) and healthy controls (HC)...
November 2, 2017: Gut
https://www.readbyqxmd.com/read/29078818/the-human-lncrna-linc-pint-inhibits-tumor-cell-invasion-through-a-highly-conserved-sequence-element
#5
Oskar Marín-Béjar, Aina M Mas, Jovanna González, Dannys Martinez, Alejandro Athie, Xabier Morales, Mikel Galduroz, Ivan Raimondi, Elena Grossi, Shuling Guo, Ana Rouzaut, Igor Ulitsky, Maite Huarte
BACKGROUND: It is now obvious that the majority of cellular transcripts do not code for proteins, and a significant subset of them are long non-coding RNAs (lncRNAs). Many lncRNAs show aberrant expression in cancer, and some of them have been linked to cell transformation. However, the underlying mechanisms remain poorly understood and it is unknown how the sequences of lncRNA dictate their function. RESULTS: Here we characterize the function of the p53-regulated human lncRNA LINC-PINT in cancer...
October 27, 2017: Genome Biology
https://www.readbyqxmd.com/read/29075255/il-17-production-from-t-helper-17-mucosal-associated-invariant-t-and-%C3%AE-%C3%AE-cells-in-tuberculosis-infection-and-disease
#6
Felicity Coulter, Amy Parrish, Declan Manning, Beate Kampmann, Joseph Mendy, Mathieu Garand, David M Lewinsohn, Eleanor M Riley, Jayne S Sutherland
IL-17-producing cells have been shown to be important in the early stages of Mycobacterium tuberculosis (Mtb) infection in animal models. However, there are very little data on the role of IL-17 in human studies of tuberculosis (TB). We recruited TB patients and their highly exposed contacts who were further categorized based on results from an IFN-γ-release assay (IGRA): (1) IGRA positive (IGRA(+)) at recruitment (latently TB infected), (2) IGRA negative (IGRA(-)) at recruitment and 6 months [non-converters (NC)], and (3) IGRA(-) at recruitment and IGRA(+) at 6 months (converters)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29052767/acute-regulation-of-multidrug-resistance-associated-protein-2-localization-and-activity-by-camp-and-estradiol-17%C3%AE-d-glucuronide-in-rat-intestine-and-caco-2-cells
#7
Guillermo Nicolás Tocchetti, Agostina Arias, Maite Rocío Arana, Juan Pablo Rigalli, Camila Juliana Domínguez, Felipe Zecchinati, María Laura Ruiz, Silvina Stella Maris Villanueva, Aldo Domingo Mottino
Multidrug resistance-associated protein 2 (MRP2) is an ATP-dependent transporter expressed at the brush border membrane of the enterocyte that confers protection against absorption of toxicants from foods or bile. Acute, short-term regulation of intestinal MRP2 activity involving changes in its apical membrane localization was poorly explored. We evaluated the effects of dibutyryl-cAMP (db-cAMP), a permeable analog of cAMP, and estradiol-17β-D-glucuronide (E217G), an endogenous derivative of estradiol, on MRP2 localization and activity using isolated rat intestinal sacs and Caco-2 cells, a model of human intestinal epithelium...
October 20, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/29046484/t-cells-expressing-chimeric-antigen-receptor-promote-immune-tolerance
#8
Antonio Pierini, Bettina P Iliopoulou, Heshan Peiris, Magdiel Pérez-Cruz, Jeanette Baker, Katie Hsu, Xueying Gu, Ping-Ping Zheng, Tom Erkers, Sai-Wen Tang, William Strober, Maite Alvarez, Aaron Ring, Andrea Velardi, Robert S Negrin, Seung K Kim, Everett H Meyer
Cellular therapies based on permanent genetic modification of conventional T cells have emerged as a promising strategy for cancer. However, it remains unknown if modification of T cell subsets, such as Tregs, could be useful in other settings, such as allograft transplantation. Here, we use a modular system based on a chimeric antigen receptor (CAR) that binds covalently modified mAbs to control Treg activation in vivo. Transient expression of this mAb-directed CAR (mAbCAR) in Tregs permitted Treg targeting to specific tissue sites and mitigated allograft responses, such as graft-versus-host disease...
October 19, 2017: JCI Insight
https://www.readbyqxmd.com/read/29042861/corrigendum-natural-killer-cells-from-patients-with-recombinase-activating-gene-and-non-homologous-end-joining-gene-defects-comprise-a-higher-frequency-of-cd56-bright-nkg2a-cells-and-yet-display-increased-degranulation-and-higher-perforin-content
#9
Kerry Dobbs, Giovanna Tabellini, Enrica Calzoni, Ornella Patrizi, Paula Martinez, Silvia Clara Giliani, Daniele Moratto, Waleed Al-Herz, Caterina Cancrini, Morton Cowan, Jacob Bleesing, Claire Booth, David Buchbinder, Siobhan O Burns, Talal A Chatila, Janet Chou, Vanessa Daza-Cajigal, Lisa M Ott de Bruin, Maite Teresa de la Morena, Gigliola Di Matteo, Andrea Finocchi, Raif Geha, Rakesh K Goyal, Anthony Hayward, Steven Holland, Chiung-Hui Huang, Maria G Kanariou, Alejandra King, Blanka Kaplan, Anastasiya Kleva, Taco W Kuijpers, Bee Wah Lee, Vassilios Lougaris, Michel Massaad, Isabelle Meyts, Megan Morsheimer, Benedicte Neven, Sung-Yun Pai, Nima Parvaneh, Alessandro Plebani, Susan Prockop, Ismail Reisli, Jian Yi Soh, Raz Somech, Troy R Torgerson, Yae-Jean Kim, Jolan E Walter, Andrew R Gennery, Sevgi Keles, John P Manis, Emanuela Marcenaro, Alessandro Moretta, Silvia Parolini, Luigi D Notarangelo
[This corrects the article on p. 798 in vol. 8, PMID: 28769923.].
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29024803/graft-derived-reconstitution-of-mucosal-associated-invariant-t-cells-after-allogeneic-hematopoietic-cell-transplantation
#10
Abir Bhattacharyya, Laïla-Aïcha Hanafi, Alyssa Sheih, Jonathan L Golob, Sujatha Srinivasan, Michael J Boeckh, Steven A Pergam, Sajid Mahmood, Kelsey K Baker, Ted A Gooley, Filippo Milano, David N Fredricks, Stanley R Riddell, Cameron J Turtle
Mucosal-associated invariant T (MAIT) cells express a semi-invariant Vα7.2(+) T cell receptor (TCR) that recognizes ligands from distinct bacterial and fungal species. In neonates, MAIT cells proliferate coincident with gastrointestinal (GI) bacterial colonization. In contrast, under non-inflammatory conditions adult MAIT cells remain quiescent due to acquired regulation of TCR signaling. Effects of inflammation and the altered GI microbiota after allogeneic hematopoietic cell transplantation (HCT) on MAIT cell reconstitution have not been described...
October 9, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29022498/atp-binding-cassette-exporters-structure-and-mechanism-with-a-focus-on-p-glycoprotein-and-mrp1
#11
Maite Rocío Arana, Guillermo Altenberg
The majority of proteins that belong to the ATP-binding cassette (ABC) superfamily are transporters that mediate the efflux of substrates from cells. These exporters include multidrug resistance proteins of the ABCB and ABCC subfamilies, such as P-glycoprotein (Pgp) and MRP1, respectively. These proteins are not only involved in the resistance of cancer to cytotoxic agents, but also in the protection from endo and xenobiotics, and the determination of drug pharmacokinetics, as well as in the pathophysiology of a variety of disorders...
October 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28994713/the-luteovirus-p4-movement-protein-is-a-suppressor-of-systemic-rna-silencing
#12
Adriana F Fusaro, Deborah A Barton, Kenlee Nakasugi, Craig Jackson, Melanie L Kalischuk, Lawrence M Kawchuk, Maite F S Vaslin, Regis L Correa, Peter M Waterhouse
The plant viral family Luteoviridae is divided into three genera: Luteovirus, Polerovirus and Enamovirus. Without assistance from another virus, members of the family are confined to the cells of the host plant's vascular system. The first open reading frame (ORF) of poleroviruses and enamoviruses encodes P0 proteins which act as silencing suppressor proteins (VSRs) against the plant's viral defense-mediating RNA silencing machinery. Luteoviruses, such as barley yellow dwarf virus-PAV (BYDV-PAV), however, have no P0 to carry out the VSR role, so we investigated whether other proteins or RNAs encoded by BYDV-PAV confer protection against the plant's silencing machinery...
October 10, 2017: Viruses
https://www.readbyqxmd.com/read/28991267/cytotoxic-and-regulatory-roles-of-mucosal-associated-invariant-t-cells-in-type-1-diabetes
#13
Ophélie Rouxel, Jennifer Da Silva, Lucie Beaudoin, Isabelle Nel, Céline Tard, Lucie Cagninacci, Badr Kiaf, Masaya Oshima, Marc Diedisheim, Marion Salou, Alexandra Corbett, Jamie Rossjohn, James McCluskey, Raphael Scharfmann, Manuela Battaglia, Michel Polak, Olivier Lantz, Jacques Beltrand, Agnès Lehuen
Type 1 diabetes (T1D) is an autoimmune disease that results from the destruction of pancreatic β-cells by the immune system that involves innate and adaptive immune cells. Mucosal-associated invariant T cells (MAIT cells) are innate-like T-cells that recognize derivatives of precursors of bacterial riboflavin presented by the major histocompatibility complex (MHC) class I-related molecule MR1. Since T1D is associated with modification of the gut microbiota, we investigated MAIT cells in this pathology. In patients with T1D and mice of the non-obese diabetic (NOD) strain, we detected alterations in MAIT cells, including increased production of granzyme B, which occurred before the onset of diabetes...
October 9, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28987476/the-mait-conundrum-how-human-mait-cells-distinguish-bacterial-colonization-from-infection-in-mucosal-barrier-tissues
#14
REVIEW
Julia D Berkson, Martin Prlic
We review the recent human mucosal-associated invariant T (MAIT) cell literature to examine the signals that control MAIT cell activation. We discuss these signals in context of MAIT cell function in mucosal barrier tissues and address how MAIT cells avoid responding to commensal bacteria, while maintaining responsiveness to infections.
December 2017: Immunology Letters
https://www.readbyqxmd.com/read/28987421/liver-mait-cells-in-hepatitis-c-pathogenetic-role-or-innocent%C3%A2-bystanders
#15
EDITORIAL
Mario U Mondelli
No abstract text is available yet for this article.
October 4, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28981086/engineered-fibroblast-growth-factor-19-protects-from-acetaminophen-induced-liver-injury-and-stimulates-aged-liver-regeneration-in-mice
#16
Gloria Alvarez-Sola, Iker Uriarte, Maria U Latasa, Maddalen Jimenez, Marina Barcena-Varela, Eva Santamaría, Raquel Urtasun, Carlos Rodriguez-Ortigosa, Jesús Prieto, Fernando J Corrales, Anna Baulies, Carmen García-Ruiz, Jose C Fernandez-Checa, Pedro Berraondo, Maite G Fernandez-Barrena, Carmen Berasain, Matías A Avila
The liver displays a remarkable regenerative capacity triggered upon tissue injury or resection. However, liver regeneration can be overwhelmed by excessive parenchymal destruction or diminished by pre-existing conditions hampering repair. Fibroblast growth factor 19 (FGF19, rodent FGF15) is an enterokine that regulates liver bile acid and lipid metabolism, and stimulates hepatocellular protein synthesis and proliferation. FGF19/15 is also important for liver regeneration after partial hepatectomy (PH). Therefore recombinant FGF19 would be an ideal molecule to stimulate liver regeneration, but its applicability may be curtailed by its short half-life...
October 5, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28973330/prehematopoietic-stem-cell-transplantation-tear-cytokines-as-potential-susceptibility-biomarkers-for-ocular-chronic-graft-versus-host-disease
#17
Lidia Cocho, Itziar Fernández, Margarita Calonge, Maite Sainz de la Maza, Montserrat Rovira, Michael E Stern, Carmen Garcia-Vazquez, Amalia Enríquez-de-Salamanca
Purpose: To determine if cytokine tear levels before hematopoietic stem cell transplantation (HSCT) can help anticipate the occurrence of ocular chronic graft-versus-host disease (cGVHD). Methods: In this pilot study, 25 patients undergoing HSCT were followed prospectively for ≤43 months. After ocular examinations, tears were collected before HSCT. Levels of 19 cytokines (epidermal growth factor [EGF], eotaxin 1/CCL11, fractalkine/CX3CL1, IL-1Ra, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-8/CXCL8, IL-10, IL-12p70, IL-13, IL-17A, IP-10/CXCL10, IFN-γ, VEGF, TNF-α, and RANTES/CCL5) were measured by multiplex bead assay...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28971896/in-vitro-maturation-impacts-cumulus-oocyte-complex-metabolism-and-stress-in-cattle
#18
Maite Del Collado, Juliano Coelho da Silveira, Marcelo Luna Freire Oliveira, Barbara Monteiro da Silva Marques Alves, Rosineide Costa Simas, Adriana Teixeira Godoy, Mirela Batista Coelho, Lygia Azevedo Marques, Mateus Maldonado Carriero, Marcelo Fábio Gouveia Nogueira, Marcos Nogueira Eberlin, Luciano A Silva, Flávio Vieira Meirelles, Felipe Perecin
The influence of in vitro maturation (IVM) in oocytes is still not totally understood. The aim of this study was to determine the influence of IVM on the metabolism and homeostasis of bovine cumulus-oocyte complexes. In the present study, we demonstrated that IVM leads to accumulation of neutral lipids associated with differential levels of the mono-, di-, and tri-acylglycerols in both cumulus cells and oocytes. We observed that in vitro-matured oocytes exhibited decreased glutathione and reactive oxygen species levels and a lower ATP/ADP ratio when compared to in vivo-matured oocytes, with no significant differences in metabolism and stress related mRNA or miRNA levels...
October 2, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28968772/mucosal-associated-invariant-t-cells-are-more-activated-in-chronic-hepatitis-b-but-not-depleted-in-blood-reversal-by-antiviral-therapy
#19
Lauke L Boeijen, Noé R Montanari, Rik A de Groen, Gertine W van Oord, Marieke van der Heide-Mulder, Robert J de Knegt, André Boonstra
Background: Mucosal-associated invariant T (MAIT) cells might play a role in control of viral replication during chronic hepatitis B (cHBV) infection, but little is known of their number, phenotype, or function in cHBV patients. Methods: We performed flow cytometry on CD3+Vɑ7.2+CD161+ MAIT cells in blood of 55 cHBV patients. Nine patients were sampled before and on entecavir treatment. Six patients on therapy underwent a liver biopsy for flow cytometric analysis...
November 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28968740/activity-dependent-neuroplasticity-induced-by-an-enriched-environment-reverses-cognitive-deficits-in-scribble-deficient-mouse
#20
Muna L Hilal, Maité M Moreau, Claudia Racca, Vera L Pinheiro, Nicolas H Piguel, Marie-Josée Santoni, Steve Dos Santos Carvalho, Jean-Michel Blanc, Yah-Se K Abada, Ronan Peyroutou, Chantal Medina, Hélène Doat, Thomas Papouin, Laurent Vuillard, Jean-Paul Borg, Rivka Rachel, Aude Panatier, Mireille Montcouquiol, Stéphane H R Oliet, Nathalie Sans
Planar cell polarity (PCP) signaling is well known to play a critical role during prenatal brain development; whether it plays specific roles at postnatal stages remains rather unknown. Here, we investigated the role of a key PCP-associated gene scrib in CA1 hippocampal structure and function at postnatal stages. We found that Scrib is required for learning and memory consolidation in the Morris water maze as well as synaptic maturation and NMDAR-dependent bidirectional plasticity. Furthermore, we unveiled a direct molecular interaction between Scrib and PP1/PP2A phosphatases whose levels were decreased in postsynaptic density of conditional knock-out mice...
December 1, 2017: Cerebral Cortex
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