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T cell regulators

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https://www.readbyqxmd.com/read/29777913/the-tp53-induced-glycolysis-and-apoptosis-regulator-mediates-cooperation-between-htlv-1-p30-ii-and-the-retroviral-oncoproteins-tax-and-hbz-and-is-highly-expressed-in-an-in-vivo-xenograft-model-of-htlv-1-induced-lymphoma
#1
Tetiana Hutchison, Aditi Malu, Laçin Yapindi, Rachel Bergeson, Kendra Peck, Megan Romeo, Carolyn Harrod, Jordan Pope, Louisa Smitherman, Wesleigh Gwinn, Lee Ratner, Courtney Yates, Robert Harrod
The human T-cell leukemia virus type-1 (HTLV-1) is an oncoretrovirus that infects and transforms CD4+ T-cells and causes adult T-cell leukemia/lymphoma (ATLL) -an aggressive lymphoproliferative disease that is highly refractive to most anticancer therapies. The HTLV-1 proviral genome encodes several regulatory products within a conserved 3' nucleotide sequence, known as pX; however, it remains unclear how these factors might cooperate or dynamically interact in virus-infected cells. Here we demonstrate that the HTLV-1 latency-maintenance factor p30II induces the TP53-induced glycolysis and apoptosis regulator (TIGAR) and counters the oxidative stress, mitochondrial damage, and cytotoxicity caused by the viral oncoproteins Tax and HBZ...
May 16, 2018: Virology
https://www.readbyqxmd.com/read/29777742/a-functional-glycoproteomics-approach-identifies-cd13-as-a-novel-e-selectin-ligand-in-breast-cancer
#2
M A Carrascal, M Silva, J A Ferreira, R Azevedo, D Ferreira, A M N Silva, D Ligeiro, L L Santos, R Sackstein, P A Videira
BACKGROUND: The glycan moieties sialyl-Lewis-X and/or -A (sLeX/A ) are the primary ligands for E-selectin, regulating subsequent tumor cell extravasation into distant organs. However, the nature of the glycoprotein scaffolds displaying these glycans in breast cancer remains unclear and constitutes the focus of the present investigation. METHODS: We isolated glycoproteins that bind E-selectin from the CF1_T breast cancer cell line, derived from a patient with ductal carcinoma...
May 16, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29777657/mcv-mir-m1-targets-the-host-cell-immune-response-resulting-in-the-attenuation-of-neutrophil-chemotaxis
#3
P Akhbari, D Tobin, K Poterlowicz, W Roberts, J R Boyne
Virus-encoded miRNAs are emerging as key regulators of persistent infection and host-cell immune evasion. Merkel cell polyomavirus (MCPyV), the predominant aetiological agent of Merkel cell carcinoma (MCC), encodes a single miRNA, MCV-miR-M1, which targets the oncogenic MCPyV large T antigen (LT). MCV-miR-M1 has previously been shown to play an important role in establishment of long-term infection, however, the underlying mechanism is not fully understood. A key unanswered question is whether, in addition to auto-regulating LT, MCV-miR-M1 also targets cellular transcripts to orchestrate an environment conducive for persistent infection...
May 16, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29777151/integrated-proteomics-genomics-metabolomics-approaches-reveal-oxalic-acid-as-pathogenicity-factor-in-tilletia-indica-inciting-karnal-bunt-disease-of-wheat
#4
Vishakha Pandey, Manoj Singh, Dinesh Pandey, Anil Kumar
Tilletia indica incites Karnal bunt (KB) disease in wheat. To date, no KB resistant wheat cultivar could be developed due to non-availability of potential biomarkers related to pathogenicity/virulence for screening of resistant wheat genotypes. The present study was carried out to compare the proteomes of T. indica highly (TiK) and low (TiP) virulent isolates. Twenty one protein spots consistently observed as up-regulated/differential in the TiK proteome were selected for identification by MALDI-TOF/TOF. Identified sequences showed homology with fungal proteins playing essential role in plant infection and pathogen survival, including stress response, adhesion, fungal penetration, invasion, colonization, degradation of host cell wall, signal transduction pathway...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29777027/t-cell-proliferation-and-colitis-are-initiated-by-defined-intestinal-microbes
#5
Pailin Chiaranunt, Justin T Tometich, Junyi Ji, Timothy W Hand
Inflammatory bowel disease has been associated with the dysregulation of T cells specific to Ags derived from the intestinal microbiota. How microbiota-specific T cells are regulated is not completely clear but is believed to be mediated by a combination of IgA, regulatory T cells, and type 3 innate lymphoid cells. To test the role of these regulatory components on microbiota-specific T cells, we bred CBir1 TCR transgenic (CBir1Tg) mice (specific to flagellin from common intestinal bacteria) onto a lymphopenic Rag1-/- background...
May 18, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29776595/clinicopathologic-significance-of-lair-1-expression-in-hepatocellular-carcinoma
#6
Xiaojie Wu, Leyan Zhang, Jiadi Zhou, Luying Liu, Qiang Fu, Aili Fu, Xiaoying Feng, Rui Xin, Hongrui Liu, Yong Gao, Jiangnan Xue
AIM: Leukocyte-associated immunoglobulin-like receptor-1 (LAIR-1) is an immune inhibitory receptor which is expressed within most types of hematopoietic cells and negatively regulates immune responses. Recently, we found LAIR-1 expression to be present within tumors of nonhematopoietic lineages. However, the roles of LAIR-1 in hepatocellular carcinoma (HCC) have yet to be examined. The purpose of this study was to investigate the expression of LAIR-1 in HCC tissue and assess its clinical significance at this site...
April 30, 2018: Current Problems in Cancer
https://www.readbyqxmd.com/read/29776409/calcitriol-downregulates-fibroblast-growth-factor-receptor-1-through-histone-deacetylase-activation-in-hl-1-atrial-myocytes
#7
Ting-Wei Lee, Ting-I Lee, Yung-Kuo Lin, Yu-Hsun Kao, Yi-Jen Chen
BACKGROUND: Fibroblast growth factor (FGF)-2 plays a crucial role in the pathophysiology of cardiovascular diseases (CVDs). FGF-2 was reported to induce cardiac hypertrophy through activation of FGF receptor 1 (FGFR1). Multiple laboratory findings indicate that calcitriol may be a potential treatment for CVDs. In this study, we attempted to investigate whether calcitriol regulates FGFR1 expression to modulate the effects of FGF-2 signaling in cardiac myocytes and explored the potential regulatory mechanism...
May 18, 2018: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29776374/the-toxoplasma-gondii-me-49-strain-upregulates-levels-of-a20-that-inhibit-nf-%C3%AE%C2%BAb-activation-and-promotes-apoptosis-in-human-leukaemia-t-cell-lines
#8
Qian Chen, Min-Hui Pang, Xiao-Hong Ye, Guang Yang, Chen Lin
BACKGROUND: Acute T-lymphocyte leukaemia is a form of haematological malignancy with abnormal activation of NF-κB pathway, which results in high expression of A20 and ABIN1, which constitute a negative feedback mechanism for the regulation of NF-κB activation. Clinical studies have found that acute T-lymphocyte leukaemia patients are susceptible to Toxoplasma gondii infection; however, the effect of T. gondii on the proliferation and apoptosis of human leukaemia T-cells remains unclear...
May 18, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29775622/clinicopathological-analysis-of-immunohistochemical-expression-of-retinoic-acid-related-orphan-receptor-%C3%AE-t-in-peripheral-t-cell-lymphoma-not-otherwise-specified
#9
Eriko Yanagida, Hiroaki Miyoshi, Keisuke Kawamoto, Kazutaka Nakashima, Kotaro Matsuda, Kyohei Yamada, Reiji Muto, Koji Nagafuji, Masao Seto, Koichi Ohshima
Peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS) is cytologically and phenotypically heterogeneous. Retinoic acid-related orphan receptor-γt (RORγt) is a transcription factor that regulates the differentiation of naïve CD4+ helper T-cells to Th17 cells. In the present study, we immunohistochemically confirmed the expression of RORγt in PTCL-NOS. Pathological and clinical investigations were performed for 170 cases of PTCL-NOS. RORγt-positive cases accounted for 17.6% (30/170) of the total cases and they showed a significantly higher frequency of CD8 positivity (P=...
May 15, 2018: Human Pathology
https://www.readbyqxmd.com/read/29775592/dietary-and-microbial-oxazoles-induce-intestinal-inflammation-by-modulating-aryl-hydrocarbon-receptor-responses
#10
Shankar S Iyer, Thomas Gensollen, Amit Gandhi, Sungwhan F Oh, Joana F Neves, Frederic Collin, Richard Lavin, Carme Serra, Jonathan Glickman, Punyanganie S A de Silva, R Balfour Sartor, Gurdyal Besra, Russell Hauser, Anthony Maxwell, Amadeu Llebaria, Richard S Blumberg
Genome-wide association studies have identified risk loci associated with the development of inflammatory bowel disease, while epidemiological studies have emphasized that pathogenesis likely involves host interactions with environmental elements whose source and structure need to be defined. Here, we identify a class of compounds derived from dietary, microbial, and industrial sources that are characterized by the presence of a five-membered oxazole ring and induce CD1d-dependent intestinal inflammation. We observe that minimal oxazole structures modulate natural killer T cell-dependent inflammation by regulating lipid antigen presentation by CD1d on intestinal epithelial cells (IECs)...
May 17, 2018: Cell
https://www.readbyqxmd.com/read/29775473/na-k-atpase-signaling-mediates-mir-29b-3p-regulation-and-cardiac-fibrosis-formation-in-mice-with-chronic-kidney-disease
#11
Christopher A Drummond, Xiaoming Fan, Steven T Haller, David J Kennedy, Jiang Liu, Jiang Tian
The Na/K-ATPase is an important membrane ion transporter and a signaling receptor that is essential for maintaining normal cell function. The current study examined the role of Na/K-ATPase signaling in regulating miR-29b-3p, an anti-fibrotic microRNA, in a mouse chronic kidney disease (CKD) model (5/6th partial nephrectomy or PNx). The results showed that CKD induced significant reduction of miR-29b-3p expression in the heart tissue by activation of Src and NFκB signaling in these animals. To demonstrate the role of Na/K-ATPase signaling, we also performed the PNx surgery on Na/K-ATPase α1 heterozygous (α1+/-) mice, which expresses ~40% less Na/K-ATPase α1 compared to their wild type littermates (WT) and exhibits deficiency in Na/K-ATPase signaling...
2018: PloS One
https://www.readbyqxmd.com/read/29775417/targeting-histone-methyltransferase-enhancer-of-zeste-homolog-2-inhibits-renal-epithelial-mesenchymal-transition-and-attenuates-renal-fibrosis
#12
Xiaoxu Zhou, Chongxiang Xiong, Evelyn Tolbert, Ting C Zhao, George Bayliss, Shougang Zhuang
Enhancer of zeste homolog-2 (EZH2) is a methyltransferase that induces histone H3 lysine 27 trimethylation (H3K27me3) and functions as an oncogenic factor in many cancer types. Its role in renal epithelial-mesenchymal transition (EMT) remains unknown. In this study, we found that EZH2 and H3K27me3 were highly expressed in mouse kidney with unilateral ureteral obstruction and cultured mouse kidney proximal tubular (TKPT) cells undergoing EMT. Inhibition of EZH2 with 3-deazaneplanocin A (3-DZNeP) attenuated renal fibrosis, which was associated with preserving E-cadherin expression and inhibiting Vimentin up-regulation in the obstructed kidney...
May 18, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29775416/downregulation-of-the-%C3%AE-1-and-%C3%AE-1-subunit-of-sgc-in-arterial-smooth-muscle-cells-of-opscc-is-hpv-independent
#13
Y Korkmaz, H C Roggendorf, O G Siefer, J Seehawer, T Imhof, M Plomann, W Bloch, A Friebe, C U Huebbers
The nitric oxide (NO)-sensitive soluble guanylyl cyclase (sGC) is a heterodimeric enzyme with an α and β subunit. NO binds to heme of the β1 -subunit of sGC, activates the enzyme in the reduced heme iron state in vascular smooth muscle cells (VSMCs), and generates cGMP-inducing vasodilatation and suppression of VSMC proliferation. In the complex tumor milieu with higher levels of reactive oxygen species (ROS), sGC heme iron may become oxidized and insensitive to NO. To change sGC from an NO-insensitive to NO-sensitive state or NO-independent manner, protein expression of sGC in VSMC is required...
May 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29775115/immunofluorescent-localization-of-non-myelinating-schwann-cells-and-their-interactions-with-immune-cells-in-mouse-thymus
#14
Dailun Hu, Philip K Nicholls, Changfu Yin, Khama Kelman, Qionglan Yuan, Wayne K Greene, Zhongli Shi, Bin Ma
The thymus is innervated by sympathetic/parasympathetic nerve fibers from the peripheral nervous system (PNS), suggesting a neural regulation of thymic function including T-cell development. Despite some published studies, data on the innervation and nerve-immune interaction inside the thymus remain limited. In the present study, we used immunofluorescent staining of glial fibrillary acidic protein (GFAP) coupled with confocal microscopy/three-dimensional (3D) reconstruction to reveal the distribution of non-myelinating Schwann cells (NMSC) and their interactions with immune cells inside mouse thymus...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29774996/-study-of-gonadotropin-releasing-hormone-on-suppressing-migrationg-and-invationg-of-human-nasopharyngeal-carcinoma-cells-cne2
#15
Y H Sun, T T Kong, T T Wang, H F Zhu, T W Zhuang, D P Wang
Objective: The aim of this study is to investigate the effect of gonadotropin releasing hormone (GnRH) on suppressing cell viability, apoptosis, migrationg and invationg of human nasopharyngeal carcinoma cells CNE2. Method: Nasopharyngeal carcinoma tissues and postnasal catarrh tissues were collected, the expression of GnRH positive cells and GnRH mRNA were detected by immunohistochemical staining and qRT-PCR. The human nasopharyngeal carcinoma CNE2 cells and immortalized nasopharyngeal epithelial cell line NP69 were cultured in vitro, and the expression of GnRH positive cells and GnRH mRNA were detected by immunohistochemical staining and qRT-PCR...
June 5, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29774664/the-lupus-associated-fc%C3%AE-riib-i232t-polymorphism-results-in-impairment-in-the-negative-selection-of-low-affinity-germinal-center-b-cells-via-c-abl
#16
Jyun-Pei Jhou, I-Shing Yu, Haw Hwai, Chih-Shan Chen, Pei-Lung Chen, Shiang-Jong Tzeng
OBJECTIVE: FcγRIIB is an essential negative regulator of B cells to block BCR signaling and to trigger c-Abl-dependent apoptosis of B cells. FcγRIIB-deficient mice display splenomegaly with expansion of B cells, leading to lupus. FcγRIIB-I232T is a hypo-functional polymorphism associated with lupus susceptibility in humans, an autoimmune disease linked to diminished deletion of autoreactive B cells. In the context of FcγRIIB-I232T polymorphism, we investigated the role of FcγRIIB in the deletion of low-affinity germinal center (GC) B cells, an important mechanism for preventing autoimmunity...
May 17, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29774524/%C3%AE-e-catenin-is-a-candidate-tumor-suppressor-for-the-development-of-e-cadherin-expressing-lobular-type-breast-cancer
#17
Jolien S de Groot, Max A K Rätze, Miranda van Amersfoort, Tanja Eisemann, Eva J Vlug, Mijanou T Niklaas, Suet-Feung Chin, Carlos Caldas, Paul J van Diest, Jos Jonkers, Johan de Rooij, Patrick W B Derksen
Mutational inactivation of E-cadherin (CDH1) is the main driver of invasive lobular breast cancer (ILC), although approximately 10-15% of all ILCs retain membrane-localized E-cadherin, despite the presence of an apparent non-cohesive and invasive lobular growth pattern. Given that ILC is dependent on constitutive actomyosin contraction for tumor development and progression, we used a combination of cell systems and in vivo experiments to investigate the consequences of α-catenin (CTNNA1) loss in the regulation of anchorage independence of non-invasive breast carcinoma...
May 17, 2018: Journal of Pathology
https://www.readbyqxmd.com/read/29774468/salivary-anti-coxsackievirus-b4-neutralizing-activity-and-pattern-of-immune-parameters-in-patients-with-type-1-diabetes-a-pilot-study
#18
Magloire Pandoua Nekoua, Akadiri Yessoufou, Enagnon Kazali Alidjinou, Francis Badia-Boungou, Kabirou Moutairou, Famara Sane, Didier Hober
AIMS: Enteroviruses, especially coxsackieviruses B (CV-B), have been associated with the pathogenesis of type 1 diabetes (T1D). An anti-CV-B4 neutralizing activity in saliva of T1D patients was previously reported. Our aim was to study the association between the saliva anti-CV-B4 neutralizing activity and immune parameters in T1D patients in comparison with non-diabetic individuals. METHODS: Saliva and blood samples were collected from 15 T1D patients and 8 controls...
May 17, 2018: Acta Diabetologica
https://www.readbyqxmd.com/read/29774040/-oligocellula1-high-expression-of-osmotically-responsive-genes15-promotes-cell-proliferation-with-histone-deacetylase9-and-powerdress-during-leaf-development-in-arabidopsis-thaliana
#19
Marina Suzuki, Nanae Shinozuka, Tomohiro Hirakata, Miyuki T Nakata, Taku Demura, Hirokazu Tsukaya, Gorou Horiguchi
Organ size regulation is dependent on the precise spatial and temporal regulation of cell proliferation and cell expansion. A number of transcription factors have been identified that play a key role in the determination of aerial lateral organ size, but their functional relationship to various chromatin modifiers has not been well understood. To understand how leaf size is regulated, we previously isolated the oligocellula1 ( oli1 ) mutant of Arabidopsis thaliana that develops smaller first leaves than the wild type (WT) mainly due to a reduction in the cell number...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29774029/lfa-1-in-t-cell-migration-and-differentiation
#20
REVIEW
Brandon L Walling, Minsoo Kim
Maintenance of homeostatic immune surveillance and development of effective adaptive immune responses require precise regulation of spatial and temporal lymphocyte trafficking throughout the body to ensure pathogen clearance and memory generation. Dysregulation of lymphocyte activation and migration can lead to impaired adaptive immunity, recurrent infections, and an array of autoimmune diseases and chronic inflammation. Central to the recruitment of T cells, integrins are cell surface receptors that regulate adhesion, signal transduction, and migration...
2018: Frontiers in Immunology
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