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https://www.readbyqxmd.com/read/29136142/the-forkhead-transcription-factor-foxo3-negatively-regulates-natural-killer-cell-function-and-viral-clearance-in-myocarditis
#1
Madlen Loebel, Luise Holzhauser, Jelka A Hartwig, Praphulla C Shukla, Konstantinos Savvatis, Alexander Jenke, Martina Gast, Felicitas Escher, Sonya C Becker, Sandra Bauer, Andrea Stroux, Antje Beling, Meike Kespohl, Sandra Pinkert, Henry Fechner, Uwe Kuehl, Dirk Lassner, Wolfgang Poller, Heinz-Peter Schultheiss, Tanja Zeller, Stefan Blankenberg, Anna-Pia Papageorgiou, Stephane Heymans, Ulf Landmesser, Carmen Scheibenbogen, Carsten Skurk
Aims: Foxo3 is a transcription factor involved in cell metabolism, survival, and inflammatory disease. However, mechanistic insight in Foxo3 effects is still limited. Here, we investigated the role of Foxo3 on natural killer (NK) cell responses and its effects in viral myocarditis. Methods and results: Effects of Foxo3 on viral load and immune responses were investigated in a model of coxsackie virus B3 myocarditis in wild-type (WT) and Foxo3 deficient mice. Reduced immune cell infiltration, viral titres, and pro-inflammatory cytokines in cardiac tissue were observed in Foxo3-/- mice 7 days post-infection (p...
November 9, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29115566/downregulation-of-microrna%C3%A2-155-by-preoperative-administration-of-valproic-acid-prevents-postoperative-seizures-by-upregulating-scn1a
#2
Zhijie Zhang, Zhenzhong Wang, Bo Zhang, Yan Liu
The risk of seizure is increased following brain surgery such as cranioplasty. Patients with seizures that are treated with valproic acid (VPA) may have a decreased risk of further seizures. To verify microRNA (miR)‑155 as a potential biomarker for the occurrence of seizures, reverse transcription quantitative polymerase chain reaction (RT‑qPCR) was used. Computational analysis and luciferase reporter assay was performed to identify the putative target of miR‑155. RT‑qPCR and western blot analyses were used to determine the expression level of miR‑155, sodium voltage‑gated channel α subunit 1 (SCN1A) mRNA and protein...
November 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29105307/role-of-microrna-155-in-rheumatoid-arthritis
#3
REVIEW
Lin-Chong Su, An-Fang Huang, Hong Jia, Yi Liu, Wang-Dong Xu
MicroRNAs (miRNAs) are a recently discovered class of post-transcriptional regulators that induce target messenger RNA degradation or translation inhibition. miRNA-155 (miR-155) is an important regulator of immune cells both in humans and mice, by which these cells play critical roles in the pathogenesis of rheumatoid arthritis (RA). Recent findings showed that expression of miR-155 was elevated in RA patients and arthritis models. Moreover, miR-155 overexpression or knockdown performed significantly in the development of arthritis...
November 3, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29104649/small-interfering-rna-directed-against-microrna-155-delivered-by-a-lentiviral-vector-attenuates-asthmatic-features-in-a-mouse-model-of-allergic-asthma
#4
Huilong Chen, Xiangqin Xu, Sheng Cheng, Yuzhu Xu, Qi Xuefei, Yong Cao, Jungang Xie, Cong-Yi Wang, Yongjian Xu, Weining Xiong
Asthma is a chronic T helper type 2 (Th2) cell-mediated inflammatory disease characterized by airway hyperresponsiveness (AHR) and airway inflammation. Although the majority of patients with asthma can achieve a good level of control with existing treatments, asthma runs a chronic course and the effectiveness of current treatment is not satisfactory for certain patients. MicroRNAs (miRNAs) are short noncoding RNAs that suppress gene expression at the post-transcriptional level; their role in regulating allergic inflammation remains largely unknown...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29104623/microrna-155-regulates-the-proliferation-cell-cycle-apoptosis-and-migration-of-colon-cancer-cells-and-targets-cbl
#5
Hua Yu, Weiling Xu, Fangchao Gong, Baorong Chi, Junyi Chen, Ling Zhou
MicroRNA-155 (miR-155) is a well-studied miR and acts as an oncomiR in numerous cancer types. However, the biological functions of miR-155 in colon cancer as well as its target genes have remained to be fully elucidated. In order to investigate the biological functions of miR-155, MTT, colony formation and wound healing assays, cell cycle analysis and detection of apoptosis were performed. The results demonstrated that miR-155 promoted the proliferation of colon cancer cells and enhanced their colony formation capacity, promoted their cell cycle progression and inhibited apoptosis...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29091308/in-vivo-and-in-vitro-effects-of-pth1-34-on-osteogenic-and-adipogenic-differentiation-of-human-bone-marrow-derived-mesenchymal-stem-cells-through-regulating-microrna-155
#6
Huan-Sheng Han, Fang Ju, Shuo Geng
This study aimed to investigate the effect of parathyroid hormone (PTH1-34) on osteogenic and adipogenic differentiation of hBMSCs by the regulation of miR-155. A total of 36 adult volunteers were selected in this study. Effects of PTH1-34 on the proliferation of hBMSCs and miR-155 expression were investigated using a MTT assay. The hBMSCs were divided into blank, PTH1-34, miR-155 mimic, miR-155 mimic negative control (NC), miR-155 inhibitor, miR-155 inhibitor NC, PTH1-34 + miR-155 mimic, PTH1-34 + miR-155 inhibitor and NPS R-568 groups...
November 1, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29079998/role-of-3-acetyl-11-keto-beta-boswellic-acid-in-counteracting-lps-induced-neuroinflammation-via-modulation-of-mirna-155
#7
Aya Shoukry Sayed, Iman Emam Omar Gomaa, Michael Bader, Nesrine Salah El Dine El Sayed
Neuroinflammation is one of the most important mechanisms underlying neurodegeneration. Lipopolysaccharide (LPS) is a potent inflammogen which causes cognitive dysfunction. Boswellia serrata is known since many years as a powerful anti-inflammatory herbal drug. Its beneficial effect mainly arises from inhibition of 5-lipoxygenase (5-LO) enzyme. 3-acetyl-11-keto-β-boswellic acid (AKBA) is the most potent 5-LO inhibitor extracted from the oleo-gum-resin of Boswellia serrata. The aim of the present work is to study the molecular mechanisms underlying the anti-inflammatory and neuroprotective effects of AKBA and dexamethasone (DEX) in LPS-induced neuroinflammatory model...
October 27, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29066622/microrna-155-induction-via-tnf-%C3%AE-and-ifn-%C3%AE-suppresses-expression-of-programmed-death-ligand-1-pd-l1-in-human-primary-cells
#8
Daniel Yee, Kunal M Shah, Mark C Coles, Tyson V Sharp, Dimitris Lagos
Programmed death ligand-1 (PD-L1) is a critical regulator of T cell function contributing to peripheral immune tolerance. Although it has been shown that posttranscriptional regulatory mechanisms control PD-L1 expression in cancer, it remains unknown whether such regulatory loops operate also in non-transformed cells. Here we studied PD-L1 expression in human dermal lymphatic endothelial cells (HDLECs), which play key roles in immunity and cancer. Treatment of HDLECs with the pro-inflammatory cytokines IFN-γ and TNF-α synergistically upregulated PDL1 expression...
October 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29018442/lower-expression-of-microrna-155-contributes-to-dysfunction-of-natural-killer-cells-in-patients-with-chronic-hepatitis-b
#9
Jun Ge, Zuxiong Huang, Hongyan Liu, Jiehua Chen, Zhanglian Xie, Zide Chen, Jie Peng, Jian Sun, Jinlin Hou, Xiaoyong Zhang
MicroRNAs have been reported to be regulated in different ways in a variety of liver diseases. As a key modulator of cellular function in both innate and adaptive immunity, the role of miR-155 in chronic hepatitis B virus infection remains largely unknown. Here, we investigated the expression and function of miR-155 in chronic hepatitis B (CHB) patients. It was found that miR-155 expression in peripheral blood mononuclear cells (PBMCs) was lower in CHB patients than healthy controls (HC). Among CHB infection, immune-active (IA) patients with abnormal alanine aminotransferase (ALT) levels had relatively higher miR-155 expression in PBMCs and serum than immune-tolerant carriers, but were comparable to inactive carriers...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29017169/ox-ldl-induced-microrna-155-promotes-autophagy-in-human-endothelial-cells-via-repressing-the-rheb-mtor-pathway
#10
Jinlin Lv, Lixia Yang, Ruiwei Guo, Yankun Shi, Ziwei Zhang, Jinshan Ye
BACKGROUND/AIMS: Autophagy, an evolutionary conserved biological process, is activated in cells to cope with various types of stress. MicroRNAs control several activities related to autophagy. However, the role of autophagy-related microRNAs during atherosclerosis is far from known. MicroRNA-155 was identified to be a crucial regulator of atherosclerosis. The objectives of the study were to analyze the effect of microRNA-155 on autophagic signaling and explore its mechanism in human endothelial cells under ox-LDL stress...
October 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28993299/circulating-micrornas-as-a-biomarker-to-predict-therapy-efficacy-in-hepatitis-c-patients-with-different-genotypes
#11
Zhicheng Fan, Qiaoxin Zhang, Huanzhu Chen, Ping He, Yazhen Li, Mengya Si, Xiaoyang Jiao
BACKGROUND: Hepatitis C virus (HCV) genotype exerts a major influence on therapeutic response; however, the underlying mechanisms remain unclear. The aim of the study is to investigate the circulating microRNAs as the biomarkers to predict the response to therapy in chronic hepatitisC patients (HepC) with different genotypes. METHODS: HepC patients were separated into 4 groups by genotype, healthy individuals were enrolled as the control. microRNA-122 (miR-122), microRNA-155 (miR-155) and HCV RNA in serum and exosome were measured, associations between microRNAs, viral load and other conventional biomarkers were analyzed...
October 6, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28970282/hyperlipidemia-induced-microrna-155-5p-improves-%C3%AE-cell-function-by-targeting-mafb
#12
Mengyu Zhu, Yuanyuan Wei, Claudia Geißler, Kathrin Abschlag, Judit Corbalán Campos, Michael Hristov, Julia Möllmann, Michael Lehrke, Ela Karshovska, Andreas Schober
A high-fat diet increases bacterial lipopolysaccharide (LPS) in the circulation, and thereby stimulates glucagon-like peptide-1 (GLP-1)-mediated insulin secretion by up-regulating interleukin (IL)-6. Although microRNA-155-5p (miR-155-5p), which increases IL-6 expression, is upregulated by LPS and hyperlipidemia, and patients with familial hypercholesterolemia less frequently develop diabetes, the role of miR-155-5p in the islet stress response to hyperlipidemia is unclear. Here, we demonstrate that hyperlipidemia-associated endotoxemia up-regulates miR-155-5p in murine pancreatic β-cells, which improved glucose metabolism and the adaptation of β-cells to obesity-induced insulin resistance...
September 29, 2017: Diabetes
https://www.readbyqxmd.com/read/28965281/microrna-155-inhibits-polarization-of-macrophages-to-m2-type-and-suppresses-choroidal-neovascularization
#13
Pengfei Zhang, Hong Wang, Xueting Luo, Haiyun Liu, Bing Lu, Tong Li, Shiqi Yang, Qing Gu, Bin Li, Fenghua Wang, Xiaodong Sun
Arg-1(+)Ym-1(+) M2-type macrophages play essential roles in the development of choroidal neovascularization (CNV). Thus, inhibition of M2-type macrophages may be effective in suppressing CNV. However, the potential mechanisms of macrophage polarization during development of CNV remain unclear. In this study, we report that microRNA-155 (miR-155) inhibited M2 polarization by targeting C/EBPβ in CNV model mice and in bone marrow-derived primary macrophages. Moreover, our data show that intravitreous injection of miR-155 mimics suppressed subretinal leakage and neovascularization...
September 30, 2017: Inflammation
https://www.readbyqxmd.com/read/28953910/potential-mirna-involvement-in-the-anti-adipogenic-effect-of-resveratrol-and-its-metabolites
#14
Itziar Eseberri, Arrate Lasa, Jonatan Miranda, Ana Gracia, Maria P Portillo
OBJECTIVE: Scientific research is constantly striving to find molecules which are effective against excessive body fat and its associated complications. Taking into account the beneficial effects that resveratrol exerts on other pathologies through miRNA, the aim of the present work was to analyze the possible involvement of miRNAs in the regulation of adipogenic transcription factors peroxisome proliferator-activated receptor γ (pparγ), CCAAT enhancer-binding proteins α and β (cebpβ and cebpα) induced by resveratrol and its metabolites...
2017: PloS One
https://www.readbyqxmd.com/read/28944921/inhibition-of-microrna%C3%A2-155-ameliorates-cardiac-fibrosis-in-the-process-of-angiotensin-ii%C3%A2-induced-cardiac-remodeling
#15
Yuzhen Wei, Xiaofei Yan, Lianhua Yan, Fen Hu, Wenhan Ma, Ya Wang, Shuai Lu, Qiutang Zeng, Zhaohui Wang
Cardiac fibrosis triggered by pressure overload represents one of the major challenges in the treatment of cardiovascular diseases. MicroRNA (miRNA/miR)‑155, a member of the small RNA family, has previously been demonstrated to be associated with cardiac inflammation. However, the effect of miR‑155 on cardiac fibrosis induced by angiotensin II (Ang II), particularly in cardiac fibroblasts, requires further investigation. The present study aimed to investigate the effect of miR‑155 in Ang II‑induced cardiac fibrosis using animal models and cardiac fibroblasts...
November 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944429/search-of-micrornas-regulating-the-receptor-status-of-breast-cancer-in-silico-and-experimental-confirmation-of-their-expression-in-tumors
#16
V S Chernyi, P V Tarasova, V V Kozlov, O V Saik, N E Kushlinskii, L F Gulyaeva
MicroRNA whose expression depends on the receptor status of breast cancer were selected using bioinformatic analysis. The expression of 9 microRNAs (16, 17, 21, 27, 125, 146, 155, 200a, and 221) was analyzed in 76 samples of breast cancer with various receptor phenotypes. The expression of microRNAs 155, 27, and 200a did not differ in various types of breast cancer. The data on positive correlation between the expression of microRNA-21 and microRNA-221 and negative receptor status of the tumor were confirmed...
September 25, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28940265/microrna-155-potentiates-tumour-development-in-mycosis-fungoides
#17
COMMENT
C P Tensen, M H Vermeer
No abstract text is available yet for this article.
September 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28938702/correction-endothelial-microparticles-delivering-microrna-155-into-t-lymphocytes-are-involved-in-the-initiation-of-acute-graft-versus-host-disease-following-allogeneic-hematopoietic-stem-cell-transplantation
#18
Ran Zhang, Xiaoxiao Wang, Mei Hong, Ting Luo, Miaomiao Zhao, Haorui Shen, Jun Fang, Xiaojie Li, Sibin Zang, Ping Chen, Dimin Nie, Peng Zheng, Qiuling Wu, Linghui Xia
[This corrects the article DOI: 10.18632/oncotarget.15579.].
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938575/down-regulation-of-microrna-155-promotes-selenium-deficiency-induced-apoptosis-by-tumor-necrosis-factor-receptor-superfamily-member-1b-in-the-broiler-spleen
#19
Ci Liu, Zhepeng Sun, Zhe Xu, Tianqi Liu, Tingru Pan, Shu Li
The aim of this work was to explore the microRNA profile and the effect of microRNA-155 on apoptosis in the spleen of selenium-deficient broilers. We replicated the splenic-apoptotic model in selenium-deficient broilers. In vitro, microRNA-155 oligonucleotides were transfected into lymphocytes and subsequently treated with H2O2. We observed that selenium deficiency altered the microRNA profile and decreased the expression of microRNA-155 in the broiler spleens. Tumor necrosis factor receptor superfamily member 1B was verified as a target of microRNA-155 in the splenocytes...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28912267/antitumor-immunity-is-defective-in-t-cell-specific-microrna-155-deficient-mice-and-is-rescued-by-immune-checkpoint-blockade
#20
Thomas B Huffaker, Soh-Hyun Lee, William W Tang, Jared A Wallace, Margaret Alexander, Marah C Runtsch, Dane K Larsen, Jacob Thompson, Andrew G Ramstead, Warren P Voth, Ruozhen Hu, June L Round, Matthew A Williams, Ryan M O'Connell
MicroRNA-155 (miR-155) regulates antitumor immune responses. However, its specific functions within distinct immune cell types have not been delineated in conditional knockout (KO) mouse models. In this study, we investigated the role of miR-155 specifically within T cells during the immune response to syngeneic tumors. We found that miR-155 expression within T cells is required to limit syngeneic tumor growth and promote interferon gamma (IFNγ) production by T cells within the tumor microenvironment. Consequently, we found that miR-155 expression by T cells is necessary for proper tumor-associated macrophage (TAM) expression of IFNγ-inducible genes...
September 14, 2017: Journal of Biological Chemistry
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