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https://www.readbyqxmd.com/read/28316886/identification-of-dysregulated-genes-in-rheumatoid-arthritis-based-on-bioinformatics-analysis
#1
Ruihu Hao, Haiwei Du, Lin Guo, Fengde Tian, Ning An, Tiejun Yang, Changcheng Wang, Bo Wang, Zihao Zhou
BACKGROUND: Rheumatoid arthritis (RA) is a chronic auto-inflammatory disorder of joints. The present study aimed to identify the key genes in RA for better understanding the underlying mechanisms of RA. METHODS: The integrated analysis of expression profiling was conducted to identify differentially expressed genes (DEGs) in RA. Moreover, functional annotation, protein-protein interaction (PPI) network and transcription factor (TF) regulatory network construction were applied for exploring the potential biological roles of DEGs in RA...
2017: PeerJ
https://www.readbyqxmd.com/read/28286257/grouper-epinephelus-coioides-tcr-signaling-pathway-was-involved-in-response-against-cryptocaryon-irritans-infection
#2
Ze-Xiang Li, Yan-Wei Li, Shun Xu, Yang Xu, Ze-Quan Mo, Xue-Ming Dan, Xiao-Chun Luo
T cell activation is a complicated process accompanying with the activation of T cell receptor (TCR) signaling pathway, which is not well described in teleost fish. The initiation of this pathway depends on the interaction of membrane TCR co-receptors (e.g. CD4/8, CD3 and CD45) and a series of cytoplasmic protein tyrosine kinases (e.g. Lck, Fyn and ZAP70). Cyptocaryon irritans is a ciliate pathogen of marine fish white spot disease causing huge economic lost in marine aquaculture. This parasite can infect fish gill and skin and is considered to be a good pathogen model for fish gill and skin mucosal immunity...
March 7, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28278192/pbmc-transcriptome-profiles-identifies-potential-candidate-genes-and-functional-networks-controlling-the-innate-and-the-adaptive-immune-response-to-prrsv-vaccine-in-pietrain-pig
#3
Md Aminul Islam, Christine Große-Brinkhaus, Maren Julia Pröll, Muhammad Jasim Uddin, Sharmin Aqter Rony, Dawit Tesfaye, Ernst Tholen, Michael Hoelker, Karl Schellander, Christiane Neuhoff
The porcine reproductive and respiratory syndrome (PRRS) is a devastating viral disease affecting swine production, health and welfare throughout the world. A synergistic action of the innate and the adaptive immune system of the host is essential for mounting a durable protective immunity through vaccination. Therefore, the current study aimed to investigate the transcriptome profiles of peripheral blood mononuclear cells (PBMCs) to characterize the innate and the adaptive immune response to PRRS Virus (PRRSV) vaccination in Pietrain pigs...
2017: PloS One
https://www.readbyqxmd.com/read/28250239/src-family-kinases-in-hamster-spermatozoa-evidence-for-the-presence-of-lck
#4
Durgesh Kumar Singh, Rohit Kumar Deshmukh, Praveen Kumar Narayanan, Shivaji Sisinthy, Archana Bharadwaj Siva
Sperm capacitation is a prerequisite for successful fertilization. Increase in tyrosine phosphorylation is considered the hallmark of capacitation and attempts to understand its regulation are ongoing. In this regard, we attempted to study the role of SRC family kinases (SFKs) in the hamster sperm functions. Interestingly, we found the presence of the lymphocyte-specific protein tyrosine kinase, LCK in mammalian spermatozoa and further characterized it in terms of its localization and function. LCK was found in spermatozoa of several species and its transcript was identified in the hamster testis...
March 1, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28235866/rab11-fip3-regulation-of-lck-endosomal-traffic-controls-tcr-signal-transduction
#5
Jérôme Bouchet, Iratxe Del Río-Iñiguez, Elena Vázquez-Chávez, Rémi Lasserre, Sonia Agüera-González, Céline Cuche, Mary W McCaffrey, Vincenzo Di Bartolo, Andrés Alcover
The role of endosomes in receptor signal transduction is a long-standing question, which remains largely unanswered. The T cell Ag receptor and various components of its proximal signaling machinery are associated with distinct endosomal compartments, but how endosomal traffic affects T cell signaling remains ill-defined. In this article, we demonstrate in human T cells that the subcellular localization and function of the protein tyrosine kinase Lck depends on the Rab11 effector FIP3 (Rab11 family interacting protein-3)...
February 24, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28209773/mannan-binding-lectin-a-serum-collectin-suppresses-t-cell-proliferation-via-direct-interaction-with-cell-surface-calreticulin-and-inhibition-of-proximal-t-cell-receptor-signaling
#6
Na Zhao, Jie Wu, Simin Xiong, Liyun Zhang, Xiao Lu, Shangliang Chen, Qifeng Wu, Hailan Wang, Ying Liu, Zhengliang Chen, Daming Zuo
Mannan binding lectin (MBL), initially described to activate the complement pathway, is also known to be involved in the pathogenesis of autoimmune diseases. We report a thus far unknown function of MBL as a suppressor of T-cell activation. MBL markedly inhibited T-cell proliferation induced by anti-CD3 and anti-CD28 antibodies. Moreover, the presence of MBL during T-cell priming interfered with proximal T-cell receptor signaling by decreasing phosphorylation of Lck, ZAP-70, and LAT. MBL bound to T cells through interaction between the collagen-like region of MBL and calreticulin (CRT) expressed on the T-cell surface...
February 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28185804/7-cyclopentyl-5-4-phenoxyphenyl-7h-pyrrolo-2-3-d-pyrimidin-4-ylamine-inhibits-the-proliferation-and-migration-of-vascular-smooth-muscle-cells-by-suppressing-erk-and-akt-pathways
#7
Hyang-Hee Seo, Sang Woo Kim, Chang Youn Lee, Kyu Hee Lim, Jiyun Lee, Soyeon Lim, Seahyoung Lee, Ki-Chul Hwang
Excessive vascular smooth muscle cell (VSMC) proliferation and migration after vascular injury significantly contributes to the development of occlusive vascular disease. Therefore, inhibiting the proliferation and migration of VSMCs is a validated therapeutic modality for occlusive vascular disease such as atherosclerosis and restenosis. In the present study, we screened chemical compounds for their anti-proliferative effects on VSMCs using multiple approaches, such as MTT assays, wound healing assays, and trans-well migration assays...
February 6, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28175613/369%C3%A2-chimeric-antigen-receptors-deficient-in-lck-signaling-require-4-1bb-costimulation-to-expand-in-vivo-resist-regulatory-t-cell-suppression-and-treat-solid-tumors-in-immune-intact-hosts
#8
Carter M Suryadevara, Rupen Desai, Samuel Harrison Farber, Patrick C Gedeon, Adam Swartz, David Snyder, James Herndon, Patrick Healy, Bryan D Choi, Peter Edward Fecci, Luis Sanchez-Perez, John H Sampson
No abstract text is available yet for this article.
August 1, 2016: Neurosurgery
https://www.readbyqxmd.com/read/28151556/probing-nano-organization-of-astroglia-with-multi-color-super-resolution-microscopy
#9
Janosch P Heller, Piotr Michaluk, Kohtaroh Sugao, Dmitri A Rusakov
Astroglia are essential for brain development, homeostasis, and metabolic support. They also contribute actively to the formation and regulation of synaptic circuits, by successfully handling, integrating, and propagating physiological signals of neural networks. The latter occurs mainly by engaging a versatile mechanism of internal Ca(2+) fluctuations and regenerative waves prompting targeted release of signaling molecules into the extracellular space. Astroglia also show substantial structural plasticity associated with age- and use-dependent changes in neural circuitry...
February 2, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28148733/dynamic-interaction-and-phospho-proteomics-reveal-lck-as-a-major-signaling-hub-of-cd147-in-t-cells
#10
Verena Supper, Ingrid Hartl, Cyril Boulègue, Anna Ohradanova-Repic, Hannes Stockinger
Numerous publications have addressed CD147 as a tumor marker and regulator of cytoskeleton, cell growth, stress response, or immune cell function; however, the molecular functionality of CD147 remains incompletely understood. Using affinity purification, mass spectrometry, and phosphopeptide enrichment of isotope-labeled peptides, we examined the dynamic of the CD147 microenvironment and the CD147-dependent phosphoproteome in the Jurkat T cell line upon treatment with T cell stimulating agents. We identified novel dynamic interaction partners of CD147 such as CD45, CD47, GNAI2, Lck, RAP1B, and VAT1 and, furthermore, found 76 CD147-dependent phosphorylation sites on 57 proteins...
February 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28146458/moderate-hyperoxia-induces-inflammation-apoptosis-and-necrosis-in-human-umbilical-vein-endothelial-cells-an-in-vitro-study
#11
Christina Hafner, Jing Wu, Lourdes Soto-Gonzalez, Christoph Kaun, Stefan Stojkovic, Johann Wojta, Verena Tretter, Klaus Markstaller, Klaus U Klein
BACKGROUND: Perioperative oxygen (O2) therapy can cause hyperoxia. Extreme hyperoxia can injure the cardiovascular system and remote organs. OBJECTIVE: Our primary objective was to test the hypothesis that exposure to moderate hyperoxia will induce injury to human umbilical vein endothelial cells (HUVECs), a model for studying the vascular endothelium under controlled conditions. DESIGN: In-vitro cell culture study. SETTING: Department of Anaesthesia, General Intensive Care and Pain Management, Medical University of Vienna, Austria...
March 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28122332/the-homeoprotein-dlx5-drives-murine-t-cell-lymphomagenesis-by-directly-transactivating-notch-and-upregulating-akt-signaling
#12
Yinfei Tan, Eleonora Sementino, Jinfei Xu, Jianming Pei, Zemin Liu, Timothy K Ito, Kathy Q Cai, Suraj Peri, Andres J P Klein-Szanto, David L Wiest, Joseph R Testa
Homeobox genes play a critical role in embryonic development, but they have also been implicated in cancer through mechanisms that are largely unknown. While not expressed during normal T-cell development, homeobox transcription factor genes can be reactivated via recurrent chromosomal rearrangements in human T-cell acute leukemia/lymphoma (T-ALL), a malignancy often associated with activated Notch and Akt signaling. To address how epigenetic reprogramming via an activated homeobox gene might contribute to T-lymphomagenesis, we investigated a transgenic mouse model with thymocyte-specific overexpression of the Dlx5 homeobox gene...
January 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28122231/hiv-1-activates-t-cell-signaling-independently-of-antigen-to-drive-viral-spread
#13
Alice C L Len, Shimona Starling, Maitreyi Shivkumar, Clare Jolly
HIV-1 spreads between CD4 T cells most efficiently through virus-induced cell-cell contacts. To test whether this process potentiates viral spread by activating signaling pathways, we developed an approach to analyze the phosphoproteome in infected and uninfected mixed-population T cells using differential metabolic labeling and mass spectrometry. We discovered HIV-1-induced activation of signaling networks during viral spread encompassing over 200 cellular proteins. Strikingly, pathways downstream of the T cell receptor were the most significantly activated, despite the absence of canonical antigen-dependent stimulation...
January 24, 2017: Cell Reports
https://www.readbyqxmd.com/read/28114168/thymic-origins-of-t-cell-receptor-alloreactivity
#14
Joanna Brzostek, Nicholas R J Gascoigne
MHC restriction is a unique feature of T cell antigen recognition. Mature T cells respond to antigenic nonself peptides bound to self-MHC molecules, but a sizeable fraction of peripheral T cells can also respond to nonself peptide-MHC (pMHC) complexes in the context of transplantation. MHC specificity of the T cell receptor repertoire is shaped during thymic development. Two hypotheses have been proposed to explain MHC specificity of T cells. It has been suggested that MHC specificity is an intrinsic feature of TCR structure, mediated by the germline-encoded regions of the TCR sequence...
January 20, 2017: Transplantation
https://www.readbyqxmd.com/read/28096507/de-novo-phosphorylation-and-conformational-opening-of-the-tyrosine-kinase-lck-act-in-concert-to-initiate-t-cell-receptor-signaling
#15
Lars Philipsen, Amarendra V Reddycherla, Roland Hartig, Janine Gumz, Matthias Kästle, Andreas Kritikos, Mateusz P Poltorak, Yury Prokazov, Evgeny Turbin, André Weber, Werner Zuschratter, Burkhart Schraven, Luca Simeoni, Andreas J Müller
The enzymatic activity of the Src family tyrosine kinase p56(Lck) (Lck) is tightly controlled by differential phosphorylation of two tyrosine residues, Tyr(394) and Tyr(505) Phosphorylation of Tyr(394) and the conformational opening of Lck are believed to activate the kinase, whereas Tyr(505) phosphorylation is thought to generate a closed, inactive conformation of Lck. We investigated whether the conformation of Lck and its phosphorylation state act in concert to regulate the initiation of T cell receptor (TCR) signaling...
January 17, 2017: Science Signaling
https://www.readbyqxmd.com/read/28091904/effects-of-release-active-antibodies-to-cd4-receptor-on-the-level-of-lck-kinase-in-cultured-mononuclear-cells-from-human-peripheral-blood
#16
A G Emel'yanova, V V Grechenko, N V Petrova, I P Shilovskii, E A Gorbunov, S A Tarasov, M R Khaitov, S G Morozov, O I Epshtein
For evaluation of effects of release-active antibodies to CD4 on cultured lymphocytes from human peripheral blood, we measured intracellular content of lck-kinase cell-based ELISA. In cells treated with release-active antibodies to CD4, the content of intracellular lck-kinase significantly (p<0.01) decreased in comparison with the control (purified water processed in a similar way). Phytohemagglutinin had no effect on the concentration of lck-kinase in cells. The decrease in the content of CD4-associated lck protein suggests that the preparation enhanced intracellular coupling of lck-kinase with T-cell receptor and potentiated T-cell immune response...
January 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28090323/high-thioredoxin-1-levels-in-rheumatoid-arthritis-patients-diminish-binding-and-signalling-of-the-monoclonal-antibody-tregalizumab
#17
Katharina Heim, Benjamin Dälken, Stefanie Faust, Faiza Rharbaoui, Andre Engling, Holger Wallmeier, Theodor Dingermann, Heinfried H Radeke, Jörg Schüttrumpf, Marcus Gutscher
The humanized non-depleting anti-CD4 monoclonal antibody Tregalizumab (BT-061) is able to selectively activate the suppressive function of regulatory T cells and has been investigated up to phase IIb in clinical trials in patients suffering from rheumatoid arthritis (RA). A pharmacokinetic-pharmacodynamic model based on clinical data from RA and healthy volunteers, which used the cell surface CD4 downmodulation as marker of activity, confirmed a stronger effect in healthy volunteers compared with RA patients...
December 2016: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28087841/single-cell-transcriptome-analysis-of-fish-immune-cells-provides-insight-into-the-evolution-of-vertebrate-immune-cell-types
#18
Santiago J Carmona, Sarah A Teichmann, Lauren Ferreira, Iain C Macaulay, Michael J T Stubbington, Ana Cvejic, David Gfeller
The immune system of vertebrate species consists of many different cell types that have distinct functional roles and are subject to different evolutionary pressures. Here, we first analyzed conservation of genes specific for all major immune cell types in human and mouse. Our results revealed higher gene turnover and faster evolution of trans-membrane proteins in NK cells compared with other immune cell types, and especially T cells, but similar conservation of nuclear and cytoplasmic protein coding genes...
March 2017: Genome Research
https://www.readbyqxmd.com/read/28026094/phenotypic-characteristics-of-aged-cd4-cd28-null-t-lymphocytes-are-determined-by-changes-in-the-whole-genome-dna-methylation-pattern
#19
Beatriz Suarez-Álvarez, Ramón M Rodríguez, Karin Schlangen, Aroa Baragaño Raneros, Leonardo Márquez-Kisinousky, Agustín F Fernández, Carmen Díaz-Corte, Ana M Aransay, Carlos López-Larrea
Aging is associated with a progressive loss of the CD28 costimulatory molecule in CD4(+) lymphocytes (CD28(null) T cells), which is accompanied by the acquisition of new biological and functional properties that give rise to an impaired immune response. The regulatory mechanisms that govern the appearance and function of this cell subset during aging and in several associated inflammatory disorders remain controversial. Here, we present the whole-genome DNA methylation and gene expression profiles of CD28(null) T cells and its CD28(+) counterpart...
April 2017: Aging Cell
https://www.readbyqxmd.com/read/27995987/intrinsic-photosensitivity-enhances-motility-of-t-lymphocytes
#20
Thieu X Phan, Barbara Jaruga, Sandeep C Pingle, Bidhan C Bandyopadhyay, Gerard P Ahern
Sunlight has important biological effects in human skin. Ultraviolet (UV) light striking the epidermis catalyzes the synthesis of Vitamin D and triggers melanin production. Although a causative element in skin cancers, sunlight is also associated with positive health outcomes including reduced incidences of autoimmune diseases and cancers. The mechanisms, however, by which light affects immune function remain unclear. Here we describe direct photon sensing in human and mouse T lymphocytes, a cell-type highly abundant in skin...
December 20, 2016: Scientific Reports
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