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https://www.readbyqxmd.com/read/27913196/nf-kb-regulated-exosomal-mir-155-promotes-the-inflammation-associated-with-arsenite-carcinogenesis
#1
Chao Chen, Fei Luo, Xinlu Liu, Lu Lu, Hui Xu, Qianlei Yang, Junchao Xue, Le Shi, Jun Li, Aihua Zhang, Qizhan Liu
In the cancer microenvironment, extracellular communication allows various types of cells to coordinate and execute biological functions. Emerging evidence indicates that exosomes, as mediators of cell communication, are involved in tumor progression. Little is known, however, about the mechanism by which exosomal miRNAs regulate inflammatory infiltration in arsenite-induced liver cancer. The present research aimed to determine if miRNAs secreted from arsenite-transformed human hepatic epithelial (L-02) cells are transferred into normal L-02 and THLE-3 cells, which are functionally active in the recipient cells...
November 29, 2016: Cancer Letters
https://www.readbyqxmd.com/read/27909056/interferons-induce-expression-of-samhd1-in-monocytes-through-downregulation-of-mir-181a-and-mir-30a
#2
Maximilan Riess, Nina V Fuchs, Adam Idica, Matthias Hamdorf, Egbert Flory, Irene Munk Pedersen, Renate König
SAMHD1 is a phosphohydrolase maintaining cellular dNTP homeostasis but also acts as a critical regulator in innate immune responses due to its antiviral activity and association with autoimmune disease leading to aberrant activation of interferon. SAMHD1 expression is differentially regulated by interferon in certain primary cells, but the underlying mechanism is not understood. Here, we report a detailed characterization of the promotor region, the 5' and 3' untranslated region (UTR) of SAMHD1, and the mechanism responsible for the cell-type dependent upregulation of SAMHD1 protein by interferon...
December 1, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27904771/tumor-suppressive-function-of-long-noncoding-rna-malat1-in-glioma-cells-by-suppressing-mir-155-expression-and-activating-fbxw7-function
#3
Shuanzhu Cao, Yanzhou Wang, Jinquan Li, Mingliang Lv, Haitao Niu, Yong Tian
The human metastasis associated lung adenocarcinoma transcript 1 (MALAT1) is a long non-coding RNA associated with metastasis, and is a favorable prognostic factor for lung cancer. Recent studies have shown that MALAT1 plays an important role in many malignancies. However, little is known about the role of MALAT1 in glioma. In this study, we determined the expression of MALAT1 and explored its prognostic value in glioma. Further, we investigated the regulatory mechanism of MALAT1 in glioma progression. Our results showed that the expression of MALAT1 was significantly decreased in glioma specimens than in noncancerous brain tissues...
2016: American Journal of Cancer Research
https://www.readbyqxmd.com/read/27903673/combining-anti-mir-155-with-chemotherapy-for-the-treatment-of-lung-cancers
#4
Katrien Van Roosbroeck, Francesca Fanini, Tetsuro Setoyama, Cristina Ivan, Cristian Rodriguez-Aguayo, Enrique Fuentes-Mattei, Lianchun Xiao, Ivan Vannini, Roxana Redis, Lucilla D'Abundo, Xinna Zhang, Milena S Nicoloso, Simona Rossi, Vianey Gonzalez-Villasana, Rajesha Rupaimoole, Manuela Ferracin, Fortunato Morabito, Antonino Neri, Peter Ruvolo, Vivian R Ruvolo, Chad V Pecot, Dino Amadori, Lynne Aruzzo, Steliana Calin, Xuemei Wang, M James You, Alessandra Ferrajoli, Robert Z Orlowski, William Plunkett, Tara Lichtenberg, Ramana V Davuluri, Ioana Berindan-Neagoe, Massimo Negrini, Ignacio I Wistuba, Kantarjian Hagop, Anil K Sood, Gabriel Lopez-Berestein, Michael J Keating, Muller Fabbri, George A Calin
Purpose The oncogenic miR-155 is upregulated in many human cancers and its expression is increased in more aggressive and therapy resistant tumors, but the molecular mechanisms underlying miR-155-induced therapy resistance are not fully understood. The main objectives of this study were to determine the role of miR-155 in resistance to chemotherapy and to evaluate anti-miR-155 treatment to chemosensitize tumors. Experimental Design We performed in vitro studies on cell lines to investigate the role of miR-155 in therapy resistance...
November 30, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27890012/the-biology-of-%C3%AE-d-mannuronic-acid-m2000-on-human-dendritic-cell-based-on-microrna-155-and-microrna-221
#5
Nakisa Tabrizian, Nazanin Arjomand Fard, Ali Farazmand, Rahil Eftekhari, Farzaneh Tofighi Zavareh, Abbas Mirshafiey
: The aim of this study was to evaluate the effect of ß-D-mannuronic acid (M2000) on related miRNAs to dendritic cells (DCs) differentiation. DC-based immunosuppressive drugs can suppress the progression of autoimmune diseases, however, their notable side effects in increasing the risk of infectious diseases and cancers should be considered. The ß-D-mannuronic acid, as a novel non-steroidal anti-inflammatory agent, has been tested in various experimental models. The effect of M2000 on expression of miRNA-155 and miRNA-221 was examined...
November 23, 2016: Current Drug Discovery Technologies
https://www.readbyqxmd.com/read/27885839/the-association-of-plasma-mir-155-and-vcam-1-levels-with-coronary-collateral-circulation
#6
Junnan Wang, Youyou Yan, Dandan Song, Lulu Liu, Bin Liu
AIM: Inflammation plays an important role in development of coronary collateral circulation (CCC). The aim of this study is to determine whether the inflammation-related miRNA miR-155 and the inflammation marker VCAM-1 could be a biomarker for CCC. PATIENTS & METHODS: We measured levels of plasma VCAM-1 and miR-155 in patients with CCC according to Rentrop grade by ELISA or real-time polymerase chain reaction, respectively (n = 112). RESULTS: Plasma miR-155 was negatively correlated with VCAM-1 in the poor CCC group and with Rentrop grade in all patients with CCC...
November 25, 2016: Biomarkers in Medicine
https://www.readbyqxmd.com/read/27880937/prognostic-relevance-of-mirna-155-methylation-in-anaplastic-glioma
#7
Maximilian Georg Schliesser, Rainer Claus, Thomas Hielscher, Christiane Grimm, Dieter Weichenhan, Jonas Blaes, Benedikt Wiestler, Peter Hau, Johannes Schramm, Felix Sahm, Elisa K Weiß, Markus Weiler, Constance Baer, Friederike Schmidt-Graf, Gabriele Schackert, Manfred Westphal, Anne Hertenstein, Patrick Roth, Norbert Galldiks, Christian Hartmann, Torsten Pietsch, Joerg Felsberg, Guido Reifenberger, Michael Christoph Sabel, Frank Winkler, Andreas von Deimling, Christoph Meisner, Peter Vajkoczy, Michael Platten, Michael Weller, Christoph Plass, Wolfgang Wick
The outcome of patients with anaplastic gliomas varies considerably depending on single molecular markers, such as mutations of the isocitrate dehydrogenase (IDH) genes, as well as molecular classifications based on epigenetic or genetic profiles. Remarkably, 98% of the RNA within a cell is not translated into proteins. Of those, especially microRNAs (miRNAs) have been shown not only to have a major influence on physiologic processes but also to be deregulated and prognostic in malignancies.To find novel survival markers and treatment options we performed unbiased DNA methylation screens that revealed 12 putative miRNA promoter regions with differential DNA methylation in anaplastic gliomas...
November 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27878262/identification-of-suitable-reference-genes-for-bdv-infected-primary-rat-hippocampal-neurons
#8
Qiang Mao, Lujun Zhang, Yujie Guo, Lu Sun, Siwen Liu, Peng He, Rongzhong Huang, Lin Sun, Shigang Chen, Hong Zhang, Peng Xie
Borna disease virus (BDV) is a neurotropic RNA virus that infects the limbic system of mammals and results in behavioral disorders. The hippocampus is a core region in the limbic system, which contributes to memory and learning and is important in the regulation of emotion. However, no validated microRNA housekeeping genes have yet been identified in BDV‑infected rat primary hippocampal neurons. Proper normalization is key in accurate miRNA expression analysis. The present study used reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) to evaluate the expression stability of 10 commonly used reference genes [miR‑92a, 5S, U6, miR‑103, miR‑101a, miR-let-7a, miR‑16, E2 small nucleolar RNA (snoRNA), U87 and miR‑191] in BDV‑infected rat hippocampal neurons and non‑infected controls across 12 days post‑infection...
November 22, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27873272/analysis-of-viral-and-cellular-micrornas-in-ebv-infected-cells
#9
Rebecca L Skalsky
MicroRNAs are small, noncoding RNAs that posttranscriptionally regulate gene expression. The discovery of this relatively new mode of gene regulation as well as studies showing the prognostic value of viral and cellular miRNAs as biomarkers, such as in cancer progression, has stimulated the development of many methods to characterize miRNAs. EBV encodes 25 viral precursor microRNAs within its genome that are expressed during lytic and latent infection. In addition to viral miRNAs, EBV infection induces the expression of specific cellular oncogenic miRNAs, such as miR-155, miR-146a, miR-21, and others, that can contribute to the persistence of latently infected cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27870736/lidocaine-administration-controls-micrornas-alterations-observed-after-lung-ischemia-reperfusion-injury
#10
Lisa Rancan, Carlos Simón, Emmeline Marchal-Duval, Javier Casanova, Sergio Damian Paredes, Alberto Calvo, Cruz García, David Rincón, Agustín Turrero, Ignacio Garutti, Elena Vara
BACKGROUND: Ischemia-reperfusion injury (IRI) is associated with morbidity and mortality. MicroRNAs (miRNAs) have emerged as regulators of IRI, and they are involved in the pathogenesis of organ rejection. Lidocaine has proven anti-inflammatory activity in several tissues but its modulation of miRNAs has not been investigated. This work aims to investigate the involvement of miRNAs in lung IRI in a lung auto-transplantation model and to investigate the effect of lidocaine. METHODS: Three groups (sham, control, and Lidocaine), each comprising 6 pigs, underwent a lung autotransplantation...
December 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27869909/altered-levels-of-circulating-cytokines-and-micrornas-in-lean-and-obese-individuals-with-prediabetes-and-type-2-diabetes
#11
Yury O Nunez Lopez, Gabriella Garufi, Attila A Seyhan
Today obesity and type 2 diabetes (T2D) have both reached epidemic proportions. However, our current understanding of the primary mechanisms leading to these diseases is still limited due to the complex multifactorial nature of the underlying phenomena. We hypothesize that the levels of specific cytokines and miRNAs vary across the diabetes spectrum and unique signatures associated with them may serve as early biomarkers of the disease and provide insights into respective pathogenetic mechanisms. In this study, we measured the circulating levels of cytokines and microRNAs (miRNAs) in lean and obese humans with prediabetes (n = 21), T2D (n = 17), and healthy controls (n = 20) (ORIGINS trial, NCT02226640)...
November 21, 2016: Molecular BioSystems
https://www.readbyqxmd.com/read/27866054/comparison-of-mirna-signature-versus-conventional-biomarkers-before-and-after-off-pump-coronary-artery-bypass-graft
#12
Fatemeh Pourrajab, Fereshteh Torkian Velashani, Masoud Khanaghaei, Seyedhossein Hekmatimoghaddam, Mahdi Rahaie, Mohamad Reza Zare-Khormizi
Circulating levels of microRNAs (miRNAs) and their expression patterns are supposed to serve as signatures for diagnosis or prognosis of cardiovascular events. The present study aimed at determining if there is any correlation between the release pattern of 2 miRNAs and the plasma levels of conventional biomarkers cardiac troponin I (cTnI), creatine kinase (CK) and uric acid (UA) in patients undergoing their first off-pump coronary artery bypass graft (OCABG). Seventy OCABG patients (69% men, aged 59.2±8.2years) were enrolled...
November 10, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27865387/microrna-expression-signatures-in-lungs-of-mice-infected-with-mycobacterium-tuberculosis
#13
Thiago Malardo, Luiz Gustavo Gardinassi, Bernardo Pereira Moreira, Éverton Padilha, Júlio César Cetrulo Lorenzi, Luana Silva Soares, Ana Flávia Gembre, Isabela Cardoso Fontoura, Luciana Previato de Almeida, Isabel Kinney Ferreira de Miranda Santos, Célio Lopes Silva, Arlete Aparecida Martins Coelho-Castelo
Tuberculosis (TB) is a major public health concern worldwide; however the factors that account for resistance or susceptibility to disease are not completely understood. Although some studies suggest that the differential expression of miRNAs in peripheral blood of TB patients could be useful as biomarkers of active disease, their involvement during the inflammatory process in lungs of infected individuals is unknown. Here, we evaluated the global expression of miRNAs in the lungs of mice experimentally infected with Mycobacterium tuberculosis on 30 and 60 days post-infection...
December 2016: Tuberculosis
https://www.readbyqxmd.com/read/27864740/expression-levels-of-warburg-effect-related-micrornas-correlate-with-each-other-and-that-of-histone-deacetylase-enzymes-in-adult-hematological-malignancies-with-emphasis-on-acute-myeloid-leukemia
#14
Zsuzsanna Gaál, Éva Oláh, László Rejtő, Bálint László Bálint, László Csernoch
Disruption of epigenetic regulation and characteristic metabolic alterations (known as the Warburg-effect) are well-known hallmarks of cancer. In our study we investigated the expression levels of microRNAs and histone deacetylase enzymes via RT-qPCR in bone marrow specimens of adult patients suffering from hematological malignancies (total cohort n = 40), especially acute myeloid leukemia (n = 27). The levels of the three examined Warburg-effect related microRNAs (miR-378*, miR-23b, miR-26a) positively correlated with each other and the oncogenic miR-155 and miR-125b, while negatively with the level of the tumorsuppressor miR-124...
November 18, 2016: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/27862371/helicobacter-pylori-infection-modulates-the-expression-of-mirnas-associated-with-dna-mismatch-repair-pathway
#15
Juliana C Santos, Mitsue T Brianti, Victor R Almeida, Manoela M Ortega, Wolfgang Fischer, Rainer Haas, Ander Matheu, Marcelo L Ribeiro
Genetic and epigenetic inactivation of DNA mismatch repair (MMR) genes might lead to modifications in cancer-related gene expression and cancer development. Recently, it has been shown that the infection by Helicobacter pylori (H. pylori), the major causative agent of gastric cancer, induces DNA damage and inhibits MMR DNA repair. Also, it has been reported that microRNAs (miRs) have an important role in regulating genomic stability and MMR DNA repair. Thus, the aim of this study was to identify miRs regulating MMR pathway in H...
November 15, 2016: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/27856635/micrornaa-155-deficiency-leads-to-decreased-atherosclerosis-increased-white-adipose-tissue-obesity-and-nonalcoholic-fatty-liver-disease-a-novel-mouse-model-of-obesity-paradox
#16
Anthony Virtue, Candice Johnson, Jahaira Lopez-Pastraña, Ying Shao, Hangfei Fu, Xinyuan Li, Ya-Feng Li, Ying Yin, Jietang Mai, Victor Rizzo, Michael Tordoff, Zsolt Bagi, Huimin Shan, Xiaohua Jiang, Hong Wang, Xiao-Feng Yang
Obesity paradox (OP) describes a widely observed clinical finding of improved cardiovascular fitness and survival in some overweight or obese patients. The molecular mechanisms underlying OP remain enigmatic partly due to a lack of animal models mirroring OP in patients. Using apolipoprotein E knockout (ApoE-/-) mice on high-fat (HF) diet as an atherosclerotic obesity model, we demonstrated: 1) microRNA-155 (miRNA-155, miR-155) is significantly upregulated in aortas of ApoE-/- mice; and miR-155 deficiency in ApoE-/- mice inhibits atherosclerosis; 2) ApoE-/-/miR-155-/- (DKO) mice show HF diet-induced obesity, adipocyte hypertrophy and present with nonalcoholic fatty liver disease (NAFLD); 3) DKO mice demonstrate HF diet-induced elevations of plasma leptin, resistin, fed-state and fasting insulin, increased expression of adipogenic transcription factors, but lack glucose intolerance and insulin resistance...
November 17, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27843203/mir-155-regulated-inflammation-response-by-the-socs1-stat3-pdcd4-axis-in-atherogenesis
#17
Jinshan Ye, Ruiwei Guo, Yankun Shi, Feng Qi, Chuanming Guo, Lixia Yang
Inflammation response plays a critical role in all phases of atherosclerosis (AS). Increased evidence has demonstrated that miR-155 mediates inflammatory mediators in macrophages to promote plaque formation and rupture. However, the precise mechanism of miR-155 remains unclear in AS. Here, we also found that miR-155 and PDCD4 were elevated in the aortic tissue of atherosclerotic mice and ox-LDL treated RAW264.7 cells. Further studies showed that miR-155 not only directly inhibited SOCS1 expression, but also increased the expression of p-STAT and PDCD4, as well as the production of proinflammation mediators IL-6 and TNF-α...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27832630/decreased-mir-155-level-in-the-peripheral-blood-of-non-alcoholic-fatty-liver-disease-patients-may-serve-as-a-biomarker-and-may-influence-lxr-activity
#18
Lei Wang, Ning Zhang, Zun Wang, Dong-Mei Ai, Zhen-Yu Cao, Hua-Ping Pan
BACKGROUND: Obesity is now a common risk factor for non-alcoholic fatty liver disease (NAFLD). Thus, it is important to explore its underlying mechanisms. METHODS: Total RNA was extracted from peripheral whole blood samples from 50 NAFLD patients and 50 healthy controls. In addition, human liver specimens were obtained through liver biopsies from NAFLD patients and healthy controls. The level of miRNA was studied using real-time PCR. The expression of lipogenic genes was analyzed using western blot, and a dual luciferase reporter assay was conducted to identify the possible target gene...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27829437/in-vivo-inhibition-of-mir-155-significantly-alters-post-stroke-inflammatory-response
#19
Juan Carlos Pena-Philippides, Ernesto Caballero-Garrido, Tamar Lordkipanidze, Tamara Roitbak
BACKGROUND: MicroRNA miR-155 is implicated in modulation of the inflammatory processes in various pathological conditions. In our previous studies, we demonstrated that in vivo inhibition of miR-155 promotes functional recovery after mouse experimental stroke. In the present study, we explored if this beneficial effect is associated with miR-155 inhibition-induced alterations in post-stroke inflammatory response. METHODS: Intravenous injections of a specific miR-155 inhibitor were initiated at 48 h after mouse distal middle cerebral artery occlusion (dMCAO)...
November 9, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27817989/heme-oxygenase-1-affects-granulopoiesis-in-mice-through-control-of-myelocyte-proliferation
#20
Karolina Bukowska-Strakova, Maciej Ciesla, Krzysztof Szade, Witold Norbert Nowak, Robert Straka, Agata Szade, Malgorzata Tyszka-Czochara, Karolina Najder, Anna Konturek, Maciej Siedlar, Jozef Dulak, Alicja Jozkowicz
Heme oxygenase-1 (HO-1) is stress-inducible, cytoprotective enzyme degrading heme to carbon monoxide (CO), biliverdin and Fe(2+). We showed that HO-1 knock-out mice (HO-1(-/-)) have a twofold higher level of granulocytes than wild type (WT) mice, despite decreased concentration of granulocyte colony-stimulating factor (G-CSF) in the blood and reduced surface expression of G-CSF receptor on the hematopoietic precursors. This suggests the effect of HO-1 on granulopoiesis. Here we aimed to determine the stage of granulopoiesis regulated by HO-1...
October 21, 2016: Immunobiology
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