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microRNA-155

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https://www.readbyqxmd.com/read/28423578/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
#1
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
Endothelial microparticles (EMPs) upregulation has been observed in acute graft-versus-host disease (aGVHD) after allogeneic hematopoietic stem cell transplantation (allo-HSCT). However, the role of EMPs remains unclear. We found that EMPs derived from TNF-α-stimulated human umbilical vein endothelial cells (EA.hy926) concentrated more microRNA-155 (miR-155) compared with maternal cells. The miR-155 levels in MPs from peripheral blood of aGVHD patients and mice were remarkably elevated and significantly higher than the levels in plasma...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28407320/role-of-tlr4-and-mir-155-in-peripheral-blood-mononuclear-cell-mediated-inflammatory-reaction-in-coronary-slow-flow-and-coronary-arteriosclerosis-patients
#2
Jiangyan Huang, Qin Yang, Longmiao He, Jun Huang
BACKGROUND: To study the role of toll-like receptor 4 (TLR4) and MicroRNA-155 (miR-155) in the peripheral blood mononuclear cell (PBMC)-mediated inflammation in coronary slow flow (CSF) and coronary arteriosclerosis. METHODS: Patients were divided into acute coronary syndrome (ACS), stable angina pectoris (SAP), CSF, and healthy control (HC) groups. The isolated PBMCs were treated with lipopolysaccharide (LPS)/and antagomiR-155. TLR4, miR-155, and the concentrations of tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-1, and IL-10 were measured...
April 13, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28355202/microrna-155-modulates-bile-duct-inflammation-via-targeting-suppressor-of-cytokine-signaling-1-in-biliary-atresia
#3
Rui Zhao, Rui Dong, Yifan Yang, Yuqing Wang, Jin Ma, Jiang Wang, Hao Li, Shan Zheng
BACKGROUND: Biliary atresia (BA) is an etiologically perplexing disease, manifested by neonatal cholestasis, repeated cholangitis, and progressive biliary fibrosis. MiR-155 has been implicated to modulate the immune response, which contributes to biliary injury. However, its potential role in the pathogenesis of BA has not been addressed so far. METHODS: The microRNA changes from BA patients and controls were identified via microarray. The immunomodulatory function of miR-155 was investigated via cell transfection and reporter assay system...
March 29, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28319523/plasma-levels-of-microrna-155-are-upregulated-with-long-term-left-ventricular-assist-device-support
#4
Teresa Wang, Emily C OʼBrien, Joseph G Rogers, Daniel L Jacoby, Michael E Chen, Jeffrey M Testani, Dawn E Bowles, Carmelo A Milano, G Michael Felker, Chetan B Patel, Pramod N Bonde, Tariq Ahmad
Left ventricular assist device (LVAD) therapy unloads the failing heart but exposes the human body to unique pathophysiological demands such as continuous blood-flow and complete univentricular support, which are associated with increased risk of adverse clinical outcomes. MiRNAs are 22-23 nucleotide RNAs involved in regulation of multiple biological processes including the pathogenesis of heart failure (HF). Thus, measurement of miRNAs may have potential in both diagnostics as circulating biomarkers, and in therapeutics for targeted interventions...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28292310/microglial-derived-microparticles-mediate-neuroinflammation-after-traumatic-brain-injury
#5
Alok Kumar, Bogdan A Stoica, David J Loane, Ming Yang, Gelareh Abulwerdi, Niaz Khan, Asit Kumar, Stephen R Thom, Alan I Faden
BACKGROUND: Local and systemic inflammatory responses are initiated early after traumatic brain injury (TBI), and may play a key role in the secondary injury processes resulting in neuronal loss and neurological deficits. However, the mechanisms responsible for the rapid expansion of neuroinflammation and its long-term progression have yet to be elucidated. Here, we investigate the role of microparticles (MP), a member of the extracellular vesicle family, in the exchange of pro-inflammatory molecules between brain immune cells, as well as their transfer to the systemic circulation, as key pathways of inflammation propagation following brain trauma...
March 15, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28281962/microrna-155-downregulation-promotes-cell-cycle-arrest-and-apoptosis-in-diffuse-large-b-cell-lymphoma
#6
Fu-Qiang Zhu, Li Zeng, Na Tang, Ya-Ping Tang, Bo-Ping Zhou, Fang-Fang Li, Wei-Gang Wu, Xiao-Bing Zeng, Shu-Song Peng
Diffuse large B-cell lymphoma (DLBCL) is the most common non-Hodgkin's lymphoma in the adult population, and treatment of DLBCL is still unfavorable. Therefore, there is an urgent requirement to investigate the molecular mechanisms underlying DLBCL tumorigenesis. To study the potential function of microRNA-155 (miR-155) involved in the regulation of lymphoma, we monitored lymphoma cell behavior including proliferation, cell cycle, and apoptosis using CCK-8 and flow cytometry analysis. Real-time PCR was used to detect the expression levels of miR-155 in 118 lymphoma patients' tissues, and Western blot was also used to analyze the expression level of proteins correlated with cell cycle and apoptosis in lymphoma cells...
October 27, 2016: Oncology Research
https://www.readbyqxmd.com/read/28264607/anti-inflammatory-effects-of-curcumin-are-associated-with-down-regulating-microrna-155-in-lps-treated-macrophages-and-mice
#7
Feiya Ma, Fei Liu, Liang Ding, Ming You, Huimin Yue, Yujie Zhou, Yayi Hou
CONTEXT: The natural polyphenolic compound curcumin has been proved to modulate innate immune responses and possess anti-inflammatory properties. Nevertheless, the mechanism remains poorly understood, particularly regarding curcumin-regulated miRNAs under inflammatory response. OBJECTIVE: This study investigates the role of miRNA-155 in the effects of curcumin on inflammatory response in cell and a mouse model. MATERIALS AND METHODS: The anti-inflammatory activity of curcumin (5, 10 and 15 μM, 2 h) in lipopolysaccharide (LPS, 200 ng/mL)-induced cells were measured by quantitative PCR...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28246471/microrna-155-promotes-the-pathogenesis-of-experimental-colitis-by-repressing-ship-1-expression
#8
Zhan-Jun Lu, Jian-Jiong Wu, Wei-Liang Jiang, Jun-Hua Xiao, Kai-Zhong Tao, Lei Ma, Ping Zheng, Rong Wan, Xing-Peng Wang
AIM: To explore the mechanism by which microRNA-155 (miR-155) regulates the pathogenesis of experimental colitis. METHODS: A luciferase assay was performed to confirm the binding of miR-155 to the SHIP-1 3'-UTR. MiR-155 mimics, negative controls and SHIP-1 expression/knockdown vectors were established and then utilized in gain- and loss-of-function studies performed in raw264.7 cells and primary bone marrow-derived macrophages (BMDMs). Thereafter, dextran sulfate sodium (DSS)-induced colitis mouse model with or without antagomiR-155 treatment was established, and the levels of miR-155 and SHIP-1, as well as the pro-inflammatory capabilities, were measured by western blot, quantitative polymerase chain reaction, and immunohistochemistry...
February 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28225782/chronic-treatment-of-non-small-cell-lung-cancer-cells-with-gefitinib-leads-to-an-epigenetic-loss-of-epithelial-properties-associated-with-reductions-in-microrna-155-and-200c
#9
Michiko Narita, Eri Shimura, Atsumi Nagasawa, Toshiki Aiuchi, Yukari Suda, Yusuke Hamada, Daigo Ikegami, Chizuru Iwasawa, Kazuhiko Arakawa, Katsuhide Igarashi, Naoko Kuzumaki, Yusuke Yoshioka, Takahiro Ochiya, Hideyuki Takeshima, Toshikazu Ushijima, Minoru Narita
BACKGROUND: The EGFR tyrosine kinase inhibitor gefitinib is used in therapy for non-small-cell lung cancer (NSCLC). However, its application is limited by resistance-accelerated disease progression, which is accompanied by the epithelial-to-mesenchymal transition (EMT). In the present study, we performed multiple expression analyses of microRNAs (miRNAs) and quantified the expression of several related EMT players in gefitinib-resistant NSCLC cells. METHODS AND RESULTS: To establish gefitinib-resistant NSCLC cells, gefitinib-sensitive HCC827 cells, which exhibit an in-frame deletion [E746-A750] in EGFR exon 19, were exposed to gefitinib for at least 1...
2017: PloS One
https://www.readbyqxmd.com/read/28214207/microrna-155-targets-map3k10-and-regulates-osteosarcoma-cell-growth
#10
Chuangjian Wang, Xiaobo Zhang, Chunlin Zhang, Fuying Zhai, Ying Li, Zongqiang Huang
Osteosarcoma is the most common type of bone cancer prevalent in young adults. Recent studies suggested that aberrant microRNA expression plays an essential role in osteosarcoma pathogenesis. In this study, we found miR-155 up-regulation in different osteosarcoma cell lines U2OS, Saos-2 and MG-63. Through bioinformatic prediction and analysis, we identified its target MAP3K10 that involved in cell proliferation and apoptosis. This work demonstrates novel interaction between microRNA, intercellular MAPK signaling and apoptosis in osteosarcoma, which will provide targets for therapeutic development...
February 1, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28198398/microrna-155-controls-exosome-synthesis-and-promotes-gemcitabine-resistance-in-pancreatic-ductal-adenocarcinoma
#11
Manabu Mikamori, Daisaku Yamada, Hidetoshi Eguchi, Shinichiro Hasegawa, Tomoya Kishimoto, Yoshito Tomimaru, Tadafumi Asaoka, Takehiro Noda, Hiroshi Wada, Koichi Kawamoto, Kunihito Gotoh, Yutaka Takeda, Masahiro Tanemura, Masaki Mori, Yuichiro Doki
The cancer drug gemcitabine (GEM) is a key drug for treating pancreatic ductal adenocarcinoma (PDAC), but PDAC cells develop chemoresistance after long-term administration. Since the tolerance was immediately spread to every PDAC tissue in a patient, it is assumed that some certain efficient mechanisms underlay in the development of chemoresistance. Changes in the levels of particular microRNAs or alterations in intercellular communication play a dominant role in chemoresistance development, and recent data also suggest that exosomes play an important role in this process...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194952/-off-to-on-surface-enhanced-raman-spectroscopy-platform-with-padlock-probe-based-exponential-rolling-circle-amplification-for-ultrasensitive-detection-of-microrna-155
#12
Yi He, Xia Yang, Ruo Yuan, Yaqin Chai
In this work, an "off" to "on" surface-enhanced Raman spectroscopy (SERS) platform was constructed for ultrasensitive detection of microRNA (miRNA) by using a magnetic SERS substrate (Co@C/PEI/Ag) and padlock probe-based exponential rolling circle amplification (P-ERCA) strategy. Herein, miRNA 155 could act as primers to initiate rolling circle amplification (RCA) for producing a long repeat sequence, and then the obtained DNA would be cleaved into two kinds of single-stranded DNAs in the presence of nickase...
February 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28193634/purified-streptococcus-pneumoniae-endopeptidase-o-pepo-enhances-particle-uptake-by-macrophages-in-a-toll-like-receptor-2-and-mir-155-dependent-manner
#13
Hua Yao, Hong Zhang, Kai Lan, Hong Wang, Yufeng Su, Dagen Li, Zhixin Song, Fang Cui, Yibing Yin, Xuemei Zhang
Insights into the host-microbial virulence factor interaction, especially the immune signaling mechanisms, could provide novel prevention and treatment options for pneumococcal diseases. Streptococcus pneumoniae endopeptidase O (PepO) is a newly discovered and ubiquitously expressed pneumococcal virulence protein. A PepO-mutant strain showed impaired adherence to and invasion of host cells compared with the isogenic wild-type strain. It is still unknown whether PepO is involved in the host defense response to pneumococcal infection...
April 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28174416/microrna-155-promotes-g-csf-induced-mobilization-of-murine-hematopoietic-stem-and-progenitor-cells-via-propagation-of-cxcl12-signaling
#14
T Itkin, A Kumari, E Schneider, S Gur-Cohen, C Ludwig, R Brooks, O Kollet, K Golan, E Khatib-Massalha, C M Russo, J D Chisholm, A Rouhi, H Geiger, E Hornstein, W G Kerr, F Kuchenbauer, T Lapidot
No abstract text is available yet for this article.
February 24, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28164567/the-prognostic-value-of-plasma-microrna-155-and-microrna-146a-level-in-severe-sepsis-and-sepsis-induced-acute-lung-injury-patients
#15
Yan Han, Yong Li, Ying Jiang
BACKGROUND: Sepsis induced acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are lifethreatening disorders. Acute Physiology and Chronic Health Evaluation (APACHE) scores and several plasma biological markers have been identified to predict the death or treatment outcome of sepsis induced ALI. Immune related microRNAs also have the potential as biomarkers to monitor this kind of disease. METHODS: A total of 44 patients with severe sepsis, 102 patients with sepsis, and 19 healthy volunteers were enrolled in this study...
December 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28139244/microrna-155-and-viral-induced-neuroinflammation
#16
REVIEW
Laura L Dickey, Timothy M Hanley, Thomas B Huffaker, Andrew G Ramstead, Ryan M O'Connell, Thomas E Lane
MicroRNA (miRNA) regulation of gene expression is becoming an increasingly recognized mechanism by which host immune responses are governed following microbial infection. miRNAs are short, non-coding RNAs that repress translation of target genes, and have been implicated in a number of activities that modulate host immune responses, including the regulation of immune cell proliferation, survival, expansion, differentiation, migration, polarization, and effector function. This review highlights several examples in which mammalian-encoded miR-155 influences immune responses following viral infection of the CNS...
January 24, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28132399/microrna-155-5p-promotes-hepatocellular-carcinoma-progression-by-suppressing-pten-through-the-pi3k-akt-pathway
#17
Xiao Fu, Hongqing Wen, Li Jing, Yujuan Yang, Wenjuan Wang, Xuan Liang, Kejun Nan, Yu Yao, Tao Tian
MicroRNA-155-5p (miR-155-5p) has been reported to play an oncogenic role in different human malignancies; however, its role in HCC progression is not clearly understood. In this study, we used real-time PCR in 20 rats with chemically-induced HCC, 28 human HCC tissues, and the matched paracarcinoma tissues, and HCC cell lines to determine the expression patterns of miR-155-5p and PTEN mRNA. Algorithm-based and experimental strategies, such as dual luciferase gene reporter assays, real-time PCR, and Western Blots were used to identify PTEN as a candidate miR-155-5p target...
January 28, 2017: Cancer Science
https://www.readbyqxmd.com/read/28118944/microrna-155-contributes-to-enhanced-resistance-to-apoptosis-in-monocytes-from-patients-with-rheumatoid-arthritis
#18
Megha Rajasekhar, Anton M Olsson, Kathryn J A Steel, Mirella Georgouli, Ushan Ranasinghe, Christine Brender Read, Klaus S Frederiksen, Leonie S Taams
Monocytes and macrophages are key mediators of inflammation in rheumatoid arthritis (RA). Their persistence at the inflammatory site is likely to contribute to immunopathology. We sought to characterise one mechanism by which persistence may be achieved: resistance to apoptosis and the role of mir-155 in this process. CD14+ monocytes from peripheral blood (PBM) and synovial fluid (SFM) of RA patients were found to be resistant to spontaneous apoptosis relative to PBM from healthy control (HC) individuals. RA SFM were also resistant to anti-Fas-mediated apoptosis and displayed a gene expression profile distinct from HC and RA PBM populations...
January 21, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28090274/the-role-of-m2000-as-an-anti-inflammatory-agent-in-toll-like-receptor-2-microrna-155-pathway
#19
Fatemeh Pourgholi, Mahsa Hajivalili, Rasoul Razavi, Shadi Esmaeili, Behzad Baradaran, Ali Akbar Movasaghpour, Sanam Sadreddini, Hamidreza Goodarzynejad, Abbas Mirshafiey, Mehdi Yousefi
BACKGROUND: M2000 is a newly designed and safe Non-Steroidal Anti-Inflammatory Drug (NSAID). The aim of this study was to assess the effects of M2000 on expression levels of Suppressor of Cytokine Signaling-1 (SOCS-1) and Src Homology-2 domain-containing inositol-5'-phosphatase 1 (SHIP1) proteins via Toll-Like Receptor (TLR) 2/microRNA-155 pathway. METHODS: HEK293 TLR2 cell line and Peripheral Blood Mononuclear Cells (PBMCs) were treated by different concentrations of M2000 in MTT assay...
January 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/28074870/microrna-155-is-upregulated-in-ascites-in-patients-with-spontaneous-bacterial-peritonitis
#20
Philipp Lutz, Mohamed M Haimid, Alessandra Pohlmann, Jennifer Lehmann, Christian Jansen, Robert Schierwagen, Sabine Klein, Christian P Strassburg, Ulrich Spengler, Jonel Trebicka
MircoRNA's (miR) have been recognised as important modulators of gene expression and potential biomarkers. However, they have been rarely investigated in bio fluids apart from blood. We investigated the association of miR-125b and miR-155 with complications of cirrhosis. Ascites was prospectively collected from patients with cirrhosis undergoing paracentesis at our department. miR's were determined in the supernatant using qPCR and normalized by SV-40. Clinical parameters were assessed at paracentesis and during follow-up...
January 11, 2017: Scientific Reports
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