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T cell regulators

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https://www.readbyqxmd.com/read/28231625/experimental-study-on-1-25-oh-2-d3-amelioration-of-oral-lichen-planus-through-regulating-nf-%C3%AE%C2%BAb-signaling-pathway
#1
Jie Du, Ran Li, Feiyan Yu, Fang Yang, Jinhua Wang, Qingyong Chen, Xiangyu Wang, Bin Zhao, Fang Zhang
OBJECTIVE: To explore the protective function of vitamin D (VD)/vitamin D receptor (VDR) on the development of oral lichen planus (OLP) and elaborate the underling mechanism of it. METHODS: H&E staining, myeloid Peroxidase (MPO) assays, quantitative PCR (qPCR), western blotting and Elisa were used to test the human biopsies and serum. QPCR, western blotting, Elisa and siRNA transfection were also performed in LPS-induced keratinocytes to observe the functions of vitamin D and VDR...
February 23, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28231307/differential-regulation-of-c5a-receptor-1-in-innate-immune-cells-during-the-allergic-asthma-effector-phase
#2
Fanny Ender, Anna V Wiese, Inken Schmudde, Jing Sun, Tillman Vollbrandt, Peter König, Yves Laumonnier, Jörg Köhl
C5a drives airway constriction and inflammation during the effector phase of allergic asthma, mainly through the activation of C5a receptor 1 (C5aR1). Yet, C5aR1 expression on myeloid and lymphoid cells during the allergic effector phase is ill-defined. Recently, we generated and characterized a floxed green fluorescent protein (GFP)-C5aR1 knock-in mouse. Here, we used this reporter strain to monitor C5aR1 expression in airway, pulmonary and lymph node cells during the effector phase of OVA-driven allergic asthma...
2017: PloS One
https://www.readbyqxmd.com/read/28231233/association-of-topoisomerase-ii-top2a-and-dual-specificity-phosphatase-6-dusp6-single-nucleotide-polymorphisms-with-radiation-treatment-response-and-prognosis-of-lung-cancer-in-han-chinese
#3
Tian-Lu Wang, Yang-Wu Ren, He-Tong Wang, Hong Yu, Yu-Xia Zhao
BACKGROUND Mutations of DNA topoisomerase II (TOP2A) are associated with chemotherapy resistance, whereas dual-specificity phosphatase 6 (DUSP6) negatively regulates members of the mitogen-activated protein (MAP) kinase superfamily to control cell proliferation. This study assessed TOP2A and DUSP6 single nucleotide polymorphisms (SNPs) in non-small cell lung cancer (NSCLC) patients for association with chemoradiotherapy responses and prognosis. MATERIAL AND METHODS A total of 140 Chinese patients with histologically confirmed NSCLC were enrolled and subjected to genotyping of TOP2A rs471692 and DUSP6 rs2279574 using Taqman PCR...
February 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28230853/mesenchymal-stromal-cells-inhibit-cd25-expression-via-the-mtor-pathway-to-potentiate-t-cell-suppression
#4
Hyun Seung Yoo, Kyuheon Lee, Kwangmin Na, Yong Xu Zhang, Hyun-Ja Lim, TacGhee Yi, Sun U Song, Myung-Shin Jeon
Mesenchymal stromal cells (MSCs) are known to suppress T-cell activation and proliferation. Several studies have reported that MSCs suppress CD25 expression in T cells. However, the molecular mechanism underlying MSC-mediated suppression of CD25 expression has not been fully examined. Here, we investigated the mTOR pathway, which is involved in CD25 expression in T cells. We showed that MSCs inhibited CD25 expression, which was restored in the presence of an inducible nitric oxide synthase (iNOS) inhibitor...
February 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28230826/modifying-effects-of-5-azacytidine-on-metal-containing-proteins-profile-in-guerin-carcinoma-with-different-sensitivity-to-cytostatics
#5
V F Chekhun, Y V Lozovska, L A Naleskina, T V Borikun, A P Burlaka, I N Todor, D V Demash, T M Yalovenko, T V Zadvornyi, A O Pavlova, D M Storchay, N Yu Lukianova
AIM: To assess the influence of the treatment with 5-azacytidine (5-aza) on the profile of metal-containing proteins and factors of their regulation in Guerin carcinoma cells in vivo. MATERIALS AND METHODS: The study was conducted on Wistar rats transplanted with wild-type Guerin carcinoma (Guerin/WT) and its strains resistant to cisplatin (Guerin/CP) or doxorubicin (Guerin/Dox). Animals were distributed in 6 groups treated with 5-aza and control animals without treatment...
December 2016: Experimental Oncology
https://www.readbyqxmd.com/read/28230720/role-of-vitamin-a-retinoic-acid-in-regulation-of-embryonic-and-adult-hematopoiesis
#6
REVIEW
Ana Cañete, Elena Cano, Ramón Muñoz-Chápuli, Rita Carmona
Vitamin A is an essential micronutrient throughout life. Its physiologically active metabolite retinoic acid (RA), acting through nuclear retinoic acid receptors (RARs), is a potent regulator of patterning during embryonic development, as well as being necessary for adult tissue homeostasis. Vitamin A deficiency during pregnancy increases risk of maternal night blindness and anemia and may be a cause of congenital malformations. Childhood Vitamin A deficiency can cause xerophthalmia, lower resistance to infection and increased risk of mortality...
February 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28230232/carisbamate-blockade-of-t-type-voltage-gated-calcium-channels
#7
Do Young Kim, Fang-Xiong Zhang, Stan T Nakanishi, Timothy Mettler, Ik-Hyun Cho, Younghee Ahn, Florian Hiess, Lina Chen, Patrick G Sullivan, S R Wayne Chen, Gerald W Zamponi, Jong M Rho
OBJECTIVES: Carisbamate (CRS) is a novel monocarbamate compound that possesses antiseizure and neuroprotective properties. However, the mechanisms underlying these actions remain unclear. Here, we tested both direct and indirect effects of CRS on several cellular systems that regulate intracellular calcium concentration [Ca(2+) ]i . METHODS: We used a combination of cellular electrophysiologic techniques, as well as cell viability, Store Overload-Induced Calcium Release (SOICR), and mitochondrial functional assays to determine whether CRS might affect [Ca(2+) ]i levels through actions on the endoplasmic reticulum (ER), mitochondria, and/or T-type voltage-gated Ca(2+) channels...
February 23, 2017: Epilepsia
https://www.readbyqxmd.com/read/28230210/synergistic-suppression-of-autoimmune-arthritis-through-concurrent-treatment-with-tolerogenic-dc-and-msc
#8
Rong Li, Yujuan Zhang, Xiufen Zheng, Shanshan Peng, Keng Yuan, Xusheng Zhang, Weiping Min
Rheumatoid arthritis (RA) is an autoimmune disease characterized by progressive immune-mediated joint deterioration. Current treatments are not antigen specific and are associated with various adverse. We have previously demonstrated that tolerogenic dendritic cells (Tol-DC) are potent antigen-specific immune regulators, which hold great promise in immunotherapy of autoimmune diseases. In this study, we aimed to develop new immunotherapy by combining Tol-DC and mesenchymal stem cells (MSC). We demonstrated that RelB gene silencing resulted in generation of Tol-DC that suppressed T cell responses and selectively promoted Treg generation...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230171/impact-of-genetic-variation-on-human-camkk2-regulation-by-ca-2-calmodulin-and-multisite-phosphorylation
#9
Matthew T O'Brien, Jonathan S Oakhill, Naomi X Y Ling, Christopher G Langendorf, Ashfaqul Hoque, Toby A Dite, Anthony R Means, Bruce E Kemp, John W Scott
The Ca(2+)-calmodulin dependent protein kinase kinase-2 (CaMKK2) is a key regulator of neuronal function and whole-body energy metabolism. Elevated CaMKK2 activity is strongly associated with prostate and hepatic cancers, whereas reduced CaMKK2 activity has been linked to schizophrenia and bipolar disease in humans. Here we report the functional effects of nine rare-variant point mutations that were detected in large-scale human genetic studies and cancer tissues, all of which occur close to two regulatory phosphorylation sites and the catalytic site on human CaMKK2...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230058/macrophage-migration-inhibitory-factor-is-subjected-to-glucose-modification-and-oxidation-in-alzheimer-s-disease
#10
Omar Kassaar, Marta Pereira Morais, Suying Xu, Emily L Adam, Rosemary C Chamberlain, Bryony Jenkins, Tony James, Paul T Francis, Stephen Ward, Robert J Williams, Jean van den Elsen
Glucose and glucose metabolites are able to adversely modify proteins through a non-enzymatic reaction called glycation, which is associated with the pathology of Alzheimer's Disease (AD) and is a characteristic of the hyperglycaemia induced by diabetes. However, the precise protein glycation profile that characterises AD is poorly defined and the molecular link between hyperglycaemia and AD is unknown. In this study, we define an early glycation profile of human brain using fluorescent phenylboronate gel electrophoresis and identify early glycation and oxidation of macrophage migration inhibitory factor (MIF) in AD brain...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229632/redox-regulation-of-mitochondrial-functional-activity-by-quinones
#11
N G Krylova, T A Kulahava, V T Cheschevik, I K Dremza, G N Semenkova, I B Zavodnik
Quinones are among the rare compounds successfully used as therapeutic agents to correct mitochondrial diseases and as specific regulators of mitochondrial function within cells. The aim of the present study was to elucidate the redox-dependent effects of quinones on mitochondrial function. The functional parameters [respiratory activity, membrane potential, and reactive oxygen species (ROS) generation] of isolated rat liver mitochondria and mitochondria in intact cells were measured in the presence of eight exogenously applied quinones that differ in lipophilicity and one-electron reduction potential...
December 2016: Physiol Int
https://www.readbyqxmd.com/read/28229507/a-samhd1-mutation-associated-with-aicardi-gouti%C3%A3-res-syndrome-uncouples-the-ability-of-samhd1-to-restrict-hiv-1-from-its-ability-to-downmodulate-type-i-interferon-in-humans
#12
Tommy E White, Alberto Brandariz-Nuñez, Alicia Martinez-Lopez, Caitlin Knowlton, Gina Lenzi, Baek Kim, Dmitri Ivanov, Felipe Diaz-Griffero
Mutations in the human SAMHD1 gene are known to correlate with the development of the Aicardi-Goutières Syndrome (AGS), which is an inflammatory encephalopathy that exhibits neurological dysfunction characterized by increased production of type I interferon (IFN); this evidence has lead to the concept that the SAMHD1 protein negatively regulates the type I IFN response. Additionally, the SAMHD1 protein has been shown to prevent efficient HIV-1 infection of macrophages, dendritic cells and resting CD4+ T cells...
February 22, 2017: Human Mutation
https://www.readbyqxmd.com/read/28229217/foxo3-estrogen-receptor-alpha-and-androgen-receptor-impact-tumor-growth-rate-and-infiltration-of-dendritic-cell-subsets-differentially-between-male-and-female-mice
#13
Matthew G Thompson, Daniel S Peiffer, Michelle Larson, Flor Navarro, Stephanie K Watkins
Tumors evade immune recognition and destruction in many ways including the creation of an immune-suppressive tumor microenvironment (TME). Dendritic cells (DC) that infiltrate the TME are tolerogenic, and suppress effector T cells and anti-tumor activity. Previous reports demonstrated that a key regulator of tolerance in DC is the transcription factor FOXO3. Gender disparity has been studied in cancer in relation to incidence, aggressiveness, and prognosis. Few studies have touched on the importance in relation to impact on the immune system...
February 22, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28229208/trichoderma-reesei-xylanase-5-is-defective-in-the-reference-strain-qm6a-but-functional-alleles-are-present-in-other-wild-type-strains
#14
Jonas Ramoni, Martina Marchetti-Deschmann, Verena Seidl-Seiboth, Bernhard Seiboth
Trichoderma reesei is a paradigm for the regulation and industrial production of plant cell wall-degrading enzymes. Among these, five xylanases, including the glycoside hydrolase (GH) family 11 XYN1 and XYN2, the GH10 XYN3, and the GH30 XYN4 and XYN6, were described. By genome mining and transcriptome analysis, a further putative xylanase, encoded by xyn5, was identified. Analysis of xyn5 from the genome-sequenced reference strain T. reesei QM6a shows that it encodes a non-functional, truncated form of XYN5...
February 22, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28229025/effect-of-interleukin-il-35-on-il-17-expression-and-production-by-human-cd4-%C3%A2-t-cells
#15
Kosuke Okada, Takeki Fujimura, Takeshi Kikuchi, Makoto Aino, Yosuke Kamiya, Ario Izawa, Yuki Iwamura, Hisashi Goto, Iichiro Okabe, Eriko Miyake, Yoshiaki Hasegawa, Makio Mogi, Akio Mitani
BACKGROUND: Interleukin (IL)-17 produced by mainly T helper 17 (Th17) cells may play an important destructive role in chronic periodontitis (CP). Thus, anti-inflammatory cytokines, such as IL-35, might have a beneficial effect in periodontitis by inhibiting differentiation of Th17 cells. Th17 differentiation is regulated by the retinoic acid receptor-related orphan receptor (ROR) α (encoded by RORA) and RORγt (encoded by RORC). However, the role of IL-35 in periodontitis is not clear and the effect of IL-35 on the function of Th17 cells is still incompletely understood...
2017: PeerJ
https://www.readbyqxmd.com/read/28228759/interleukin-35-producing-cd8%C3%AE-dendritic-cells-acquire-a-tolerogenic-state-and-regulate-t-cell-function
#16
Sergio Haller, Anaïs Duval, Romain Migliorini, Mathias Stevanin, Vanessa Mack, Hans Acha-Orbea
Dendritic cells (DCs) play a central role in shaping immunogenic as well as tolerogenic adaptive immune responses and thereby dictate the outcome of adaptive immunity. Here, we report the generation of a CD8α(+) DC line constitutively secreting the tolerogenic cytokine interleukin (IL)-35. IL-35 secretion led to impaired CD4(+) and CD8(+) T lymphocyte proliferation and interfered with their function in vitro and also in vivo. IL-35 was furthermore found to induce a tolerogenic phenotype on CD8α(+) DCs, characterized by the upregulation of CD11b, downregulation of MHC class II, a reduced costimulatory potential as well as production of the immunomodulatory molecule IL-10...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28228757/regulation-of-epigenetic-modifiers-including-kdm6b-by-interferon-%C3%AE-and-interleukin-4-in-human-macrophages
#17
Gökçe Yıldırım-Buharalıoğlu, Mark Bond, Graciela B Sala-Newby, Charles C T Hindmarch, Andrew C Newby
BACKGROUND: Interferon-γ (IFN-γ) or interleukin-4 (IL-4) drives widely different transcriptional programs in macrophages. However, how IFN-γ and IL-4 alter expression of histone-modifying enzymes involved in epigenetic regulation and how this affects the resulting phenotypic polarization is incompletely understood. METHODS AND RESULTS: We investigated steady-state messenger RNA levels of 84 histone-modifying enzymes and related regulators in colony-stimulating factor-1 differentiated primary human macrophages using quantitative polymerase chain reaction...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28228755/dysregulation-of-socs-mediated-negative-feedback-of-cytokine-signaling-in-carcinogenesis-and-its-significance-in-cancer-treatment
#18
REVIEW
Mengmeng Jiang, Wen-Wen Zhang, Pengpeng Liu, Wenwen Yu, Ting Liu, Jinpu Yu
Suppressor of cytokine signaling (SOCS) proteins are major negative feedback regulators of cytokine signaling mediated by the Janus kinase (JAK)-signal transducer and activator of transcription signaling pathway. In particular, SOCS1 and SOCS3 are strong inhibitors of JAKs and can play pivotal roles in the development and progression of cancers. The abnormal expression of SOCS1 and SOCS3 in cancer cells is associated with the dysregulation of cell growth, migration, and death induced by multiple cytokines and hormones in human carcinomas...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28228601/loss-of-tumor-suppressor-kdm6a-amplifies-prc2-regulated-transcriptional-repression-in-bladder-cancer-and-can-be-targeted-through-inhibition-of-ezh2
#19
Lian Dee Ler, Sujoy Ghosh, Xiaoran Chai, Aye Aye Thike, Hong Lee Heng, Ee Yan Siew, Sucharita Dey, Liang Kai Koh, Jing Quan Lim, Weng Khong Lim, Swe Swe Myint, Jia Liang Loh, Pauline Ong, Xin Xiu Sam, Dachuan Huang, Tony Lim, Puay Hoon Tan, Sanjanaa Nagarajan, Christopher Wai Sam Cheng, Henry Ho, Lay Guat Ng, John Yuen, Po-Hung Lin, Cheng-Keng Chuang, Ying-Hsu Chang, Wen-Hui Weng, Steven G Rozen, Patrick Tan, Caretha L Creasy, See-Tong Pang, Michael T McCabe, Song Ling Poon, Bin Tean Teh
Trithorax-like group complex containing KDM6A acts antagonistically to Polycomb-repressive complex 2 (PRC2) containing EZH2 in maintaining the dynamics of the repression and activation of gene expression through H3K27 methylation. In urothelial bladder carcinoma, KDM6A (a H3K27 demethylase) is frequently mutated, but its functional consequences and therapeutic targetability remain unknown. About 70% of KDM6A mutations resulted in a total loss of expression and a consequent loss of demethylase function in this cancer type...
February 22, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28228105/mesenchymal-stromal-cells-as-vehicles-of-tetravalent-bispecific-tandab-cd3-cd19-for-the-treatment-of-b-cell-lymphoma-combined-with-ido-pathway-inhibitor-d-1-methyl-tryptophan
#20
Xiaolong Zhang, Yuanyuan Yang, Leisheng Zhang, Yang Lu, Qing Zhang, Dongmei Fan, Yizhi Zhang, Yanjun Zhang, Zhou Ye, Dongsheng Xiong
BACKGROUND: Although blinatumomab, a bispecific T cell engaging antibody, exhibits high clinical response rates in patients with relapsed or refractory B-precursor acute lymphoblastic leukemia (B-ALL) and B cell non-Hodgkin's lymphoma (B-NHL), it still has some limitations because of its short half-life. Mesenchymal stromal cells (MSCs) represent an attractive approach for delivery of therapeutic agents to cancer sites owing to their tropism towards tumors, but their immunosuppression capabilities, especially induced by indoleamine 2,3-dioxygenase (IDO), should also be taken into consideration...
February 23, 2017: Journal of Hematology & Oncology
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