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https://www.readbyqxmd.com/read/29024803/graft-derived-reconstitution-of-mucosal-associated-invariant-t-cells-after-allogeneic-hematopoietic-cell-transplantation
#1
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
#2
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
#3
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
#4
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
#5
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.
October 5, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28987421/liver-mait-cells-in-hepatitis-c-pathogenetic-role-or-innocent%C3%A2-bystanders
#6
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
#7
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
#8
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
#9
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-mait-cells-are-more-activated-in-chronic-hepatitis-b-but-not-depleted-in-blood-reversal-by-antiviral-therapy
#10
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 cells (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...
August 23, 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
#11
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...
November 22, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28965817/p-body-purification-reveals-the-condensation-of-repressed-mrna-regulons
#12
Arnaud Hubstenberger, Maïté Courel, Marianne Bénard, Sylvie Souquere, Michèle Ernoult-Lange, Racha Chouaib, Zhou Yi, Jean-Baptiste Morlot, Annie Munier, Magali Fradet, Maëlle Daunesse, Edouard Bertrand, Gérard Pierron, Julien Mozziconacci, Michel Kress, Dominique Weil
Within cells, soluble RNPs can switch states to coassemble and condense into liquid or solid bodies. Although these phase transitions have been reconstituted in vitro, for endogenous bodies the diversity of the components, the specificity of the interaction networks, and the function of the coassemblies remain to be characterized. Here, by developing a fluorescence-activated particle sorting (FAPS) method to purify cytosolic processing bodies (P-bodies) from human epithelial cells, we identified hundreds of proteins and thousands of mRNAs that structure a dense network of interactions, separating P-body from non-P-body RNPs...
October 5, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28960271/alterations-in-circulating-lymphoid-cell-populations-in-systemic-small-vessel-vasculitis-are-non-specific-manifestations-of-renal-injury
#13
Barbara Fazekas, Ana Moreno-Olivera, Yvelynne Kelly, Paul O'Hara, Susan Murray, Alan Kennedy, Niall Conlon, Jennifer Scott, Ashanty M Melo, Fionnuala B Hickey, Dearbhaile Dooley, Eoin C O'Brien, Sarah Moran, Derek G Doherty, Mark A Little
Innate lymphocyte populations, such as innate lymphoid cells (ILCs), γδ T cells, invariant natural killer T (iNKT) cells and mucosal associated invariant T (MAIT) cells are emerging as important effectors of innate immunity and are involved in various inflammatory and autoimmune diseases. The aim of this study was to assess the frequencies and absolute numbers of innate lymphocytes as well as conventional lymphocytes and monocytes in peripheral blood from a cohort of ANCA associated vasculitis (AAV) patients...
September 28, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28946897/undetectable-haptoglobin-is-associated-with-major-adverse-kidney-events-in-critically-ill-burn-patients
#14
François Dépret, Chloé Dunyach, Christian De Tymowski, Maïté Chaussard, Aurélien Bataille, Axelle Ferry, Nabila Moreno, Alexandru Cupaciu, Sabri Soussi, Mourad Benyamina, Alexandre Mebazaa, Kevin Serror, Marc Chaouat, Jean-Pierre Garnier, Romain Pirracchio, Matthieu Legrand
BACKGROUND: Intravascular haemolysis has been associated with acute kidney injury (AKI) in different clinical settings (cardiac surgery, sickle cell disease). Haemolysis occurs frequently in critically ill burn patients. The aim of this study was to assess the predictive value of haptoglobin at admission to predict major adverse kidney events (MAKE) and AKI in critically ill burn patients. METHODS: We conducted a retrospective, single-centre cohort study in a burn critical care unit in a tertiary centre, including all consecutive severely burned patients (total burned body surface > 20% and/or shock and/or mechanical ventilation at admission) from January 2012 to April 2017 with a plasmatic haptoglobin dosage at admission...
September 26, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28939453/bone-marrow-wt1-levels-in-allogeneic-hematopoietic-stem-cell-transplant-hct-for-acute-myeloid-leukemia-and-myelodysplasia-clinically-relevant-time-points-and-100-copies-threshold-value
#15
Josep F Nomdedéu, Albert Esquirol, Maite Carricondo, Marta Pratcorona, Montserrat Hoyos, Ana Garrido, Miguel Rubio, Elena Bussaglia, Irene García-Cadenas, Camino Estivill, Salut Brunet, Rodrigo Martino, Jorge Sierra
The outcome of allogeneic hematopoietic stem cell transplant (HCT) in patients with myeloid malignancies is better in those without minimal residual disease (MRD) than in those with MRD+ as assessed by multiparametric flow cytometry (MPFC). WT1 quantitation has also been used to assess the probability of relapse in acute myeloid leukemia treated with chemotherapy. We analyzed the clinical value of normalized bone marrow WT1 levels as a measure of the expanded myeloid progenitor compartment in a consecutive series of 193 adult patients with myeloid malignancies who underwent HCT...
September 19, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28926962/anti-nkg2d-mab-a-new-treatment-for-crohn-s-disease
#16
REVIEW
Kasper Vadstrup, Flemming Bendtsen
Crohn's disease (CD) and ulcerative colitis (UC) are immunologically-mediated, debilitating conditions resulting from destructive inflammation of the gastrointestinal tract. The pathogenesis of IBD is incompletely understood, but is considered to be the result of an abnormal immune response with a wide range of cell types and proteins involved. Natural Killer Group 2D (NKG2D) is an activating receptor constitutively expressed on human Natural Killer (NK), γδ T, mucosal-associated invariant T (MAIT), CD56⁺ T, and CD8⁺ T cells...
September 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28922750/identification-of-iridoid-glucoside-transporters-in-catharanthus-roseus
#17
Bo Larsen, Victoria L Fuller, Jacob Pollier, Alex Van Moerkercke, Fabian Schweizer, Richard Payne, Maite Colinas, Sarah E O'Connor, Alain Goossens, Barbara A Halkier
Monoterpenoid indole alkaloids (MIAs) are plant defense compounds and high-value pharmaceuticals. Biosynthesis of the universal MIA precursor, secologanin, is organized between internal phloem-associated parenchyma (IPAP) and epidermis cells. Transporters for intercellular transport of proposed mobile pathway intermediates have remained elusive. Screening of an Arabidopsis thaliana transporter library expressed in Xenopus oocytes identified AtNPF2.9 as a putative iridoid glucoside importer. Eight orthologs were identified in Catharanthus roseus, of which three, CrNPF2...
September 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28922472/mirna-506-promotes-primary-biliary-cholangitis-like-features-in-cholangiocytes-and-immune-activation
#18
Oihane Erice, Patricia Munoz-Garrido, Javier Vaquero, Maria J Perugorria, Maite G Fernandez-Barrena, Elena Saez, Alvaro Santos-Laso, Ander Arbelaiz, Raul Jimenez-Agüero, Joaquin Fernandez-Irigoyen, Enrique Santamaria, Verónica Torrano, Arkaitz Carracedo, Meenakshisundaram Ananthanarayanan, Marco Marzioni, Jesus Prieto, Ulrich Beuers, Ronald P Oude Elferink, Nicholas F LaRusso, Luis Bujanda, Jose J G Marin, Jesus M Banales
Primary biliary cholangitis (PBC) is a chronic cholestatic liver disease associated with autoimmune phenomena targeting intrahepatic bile duct cells (cholangiocytes). Although PBC etiopathogenesis still remains obscure, development of anti-mitochondrial auto-antibodies against pyruvate dehydrogenase complex-E2 (PDC-E2) is a common feature. MicroRNA (miR) dysregulation occurs in liver and immune cells of PBC patients, but their functional relevance is largely unknown. We previously reported that miR-506 is overexpressed in PBC cholangiocytes and directly targets both Cl(-) /HCO3(-) anion exchanger 2 (AE2) and type III inositol 1,4,5-trisphosphate receptor (InsP3R3), leading to cholestasis...
September 18, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28922408/the-role-of-the-pi3k-akt-signaling-pathway-in-the-developmental-competence-of-bovine-oocytes
#19
Gabriella Mamede Andrade, Juliano Coelho da Silveira, Claudia Perrini, Maite Del Collado, Samuel Gebremedhn, Dawit Tesfaye, Flávio Vieira Meirelles, Felipe Perecin
The ovarian follicle encloses oocytes in a microenvironment throughout their growth and acquisition of competence. Evidence suggests a dynamic interplay among follicular cells and oocytes, since they are constantly exchanging "messages". We dissected bovine ovarian follicles and recovered follicular cells (FCs-granulosa and cumulus cells) and cumulus-oocyte complexes (COCs) to investigate whether the PI3K-Akt signaling pathway impacted oocyte quality. Following follicle rupture, COCs were individually selected for in vitro cultures to track the follicular cells based on oocyte competence to reach the blastocyst stage after parthenogenetic activation...
2017: PloS One
https://www.readbyqxmd.com/read/28921542/pathogen-inactivation-of-dengue-virus-in-red-blood-cells-using-amustaline-and-glutathione
#20
Maite Aubry, Andrew Laughhunn, Felicia Santa Maria, Marion C Lanteri, Adonis Stassinopoulos, Didier Musso
BACKGROUND: Dengue virus (DENV) is an arbovirus primarily transmitted through mosquito bite; however, DENV transfusion-transmitted infections (TTIs) have been reported and asymptomatic DENV RNA-positive blood donors have been identified in endemic countries. DENV is considered a high-risk pathogen for blood safety. One of the mitigation strategies to prevent arbovirus TTIs is pathogen inactivation. In this study we demonstrate that the amustaline and glutathione (S-303/GSH) treatment previously found effective against Zika virus in red blood cells (RBCs) is also effective in inactivating DENV...
September 16, 2017: Transfusion
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