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https://www.readbyqxmd.com/read/29440639/the-small-gtpase-rhou-lays-downstream-of-jak-stat-signaling-and-mediates-cell-migration-in-multiple-myeloma
#1
Sara Canovas Nunes, Martina Manzoni, Marco Pizzi, Elisa Mandato, Marilena Carrino, Laura Quotti Tubi, Renato Zambello, Fausto Adami, Andrea Visentin, Gregorio Barilà, Livio Trentin, Sabrina Manni, Antonino Neri, Gianpietro Semenzato, Francesco Piazza
Multiple myeloma is a post-germinal center B-cell neoplasm, characterized by the proliferation of malignant bone marrow plasma cells, whose survival and proliferation is sustained by growth factors and cytokines present in the bone marrow microenvironment. Among them, IL-6 triggers the signal downstream of its receptor, leading to the activation of the JAK/STAT pathway. The atypical GTPase RhoU lays downstream of STAT3 transcription factor and could be responsible for mediating its effects on cytoskeleton dynamics...
February 13, 2018: Blood Cancer Journal
https://www.readbyqxmd.com/read/29373877/serum-microrna-21-negatively-relates-to-expression-of-programmed-cell-death-4-in-patients-with-epithelial-ovarian-cancer
#2
Enas H Mahmoud, Amal Fawzy, Reham A A Elshimy
Background: Ovarian cancer is the third most common cancer of the female genital tract and the leading cause of cancer death associated with gynecologic tumors. MicroRNAs regulate at least 60% of human genes, including tumor suppressor genes and oncogenes and, thereby, can affect cancer risk. Aim of the work: We aimed to assess any diagnostic role for serum miR-21 as a biomarker in human ovarian cancer and to study relations with programmed cell death-4 (PDCD4), one of its target proteins, hoping to help explain heterogeneity of this cancer type and facilitate stratification of regimens for therapy...
January 27, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29340361/a-curcumin-loaded-polymeric-micelle-as-a-carrier-of-a-microrna-21-antisense-oligonucleotide-for-enhanced-anti-tumor-effects-in-a-glioblastoma-animal-model
#3
Xiaonan Tan, Gyeungyun Kim, Dahee Lee, Jungju Oh, Minkyung Kim, Chunxian Piao, Jaewon Lee, Min Sang Lee, Ji Hoon Jeong, Minhyung Lee
A glioblastoma is a common primary brain tumor that expresses microRNA-21 (miR-21), which inhibits the expression of pro-apoptotic genes such as phosphatase and tensin homologue (PTEN) and programmed cell death 4 (PDCD4). Therefore, an antisense-oligonucleotide against miR-21 (miR21ASO) could have therapeutic effects for glioblastomas. In this study, curcumin was loaded into deoxycholic acid-conjugated polyethylenimine (DP) micelles. The curcumin-loaded DP micelle (DP-Cur) was evaluated as a carrier for the combined delivery of curcumin and miR21ASO...
January 17, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29298734/ailanthone-promotes-human-vestibular-schwannoma-cells-apoptosis-and-autophagy-by-down-regulation-of-mir-21
#4
Peizhen Yang, Dechong Sun, Fei Jiang
Ailanthone (AIL) is a quassinoid isolated from the traditional Chinese medicinal herb Ailanthus altissima. The anti-tumor activities of AIL have been reported in several cancers. The purpose of the present study was to explore the effect of AIL on vestibular schwannomas (VSs). Various concentration of AIL (0~1 μM) was used to treat human primary VS cells, and then cell viability, proliferation, apoptosis, and autophagy were assessed, respectively. Expression of miR-21 in VS cells was altered by miRNA transfection...
January 3, 2018: Oncology Research
https://www.readbyqxmd.com/read/29178290/microrna-21-contributes-to-reduced-microvascular-function-in-binge-drinking-young-adults
#5
Jing-Tan Bian, Mariann R Piano, Kumar U Kotlo, Abeer M Mahmoud, Shane A Phillips
BACKGROUND: Binge drinking is associated with increased risk for cardiovascular (CV) disease. MicroRNA-21 (miR21) is upregulated in the setting of excessive alcohol consumption and CV disease. Therefore, the goal of this study was to examine the vasodilatory responses to flow and acetylcholine in the absence and presence of an anti-miR21 inhibitor in the microcirculation of young adult repeated binge drinkers. METHODS: Gluteal subcutaneous adipose tissue biopsies were obtained from young adults (18-30 yrs, n = 35 vessels from binge drinkers [BDs] and n = 28 vessels from abstainers)...
November 25, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29135286/vitamin-b12-supplementation-influences-methylation-of-genes-associated-with-type-2-diabetes-and-its-intermediate-traits
#6
Dilip K Yadav, Smeeta Shrestha, Karen A Lillycrop, Charu V Joglekar, Hong Pan, Joanna D Holbrook, Caroline Hd Fall, Chittaranjan S Yajnik, Giriraj R Chandak
AIM: To investigate the effect of B12 and/or folic acid supplementation on genome-wide DNA methylation. METHODS: We performed Infinium HumanMethylation450 BeadChip (Zymo Research, CA, USA) assay in children supplemented with B12 and/or folic acid (n = 12 in each group) and investigated the functional mechanism of selected differentially methylated loci. RESULTS: We noted significant methylation changes postsupplementation in B12 (589 differentially methylated CpGs and 2892 regions) and B12 + folic acid (169 differentially methylated CpGs and 3241 regions) groups...
November 14, 2017: Epigenomics
https://www.readbyqxmd.com/read/29113809/mir21-drives-resistance-to-heat-shock-protein-90-inhibition-in-cholangiocarcinoma
#7
Andrea Lampis, Pietro Carotenuto, Georgios Vlachogiannis, Luciano Cascione, Somaieh Hedayat, Rosemary Burke, Paul Clarke, Else Bosma, Michele Simbolo, Aldo Scarpa, Sijia Yu, Rebecca Cole, Elizabeth Smyth, Javier Fernández Mateos, Ruwaida Begum, Blanka Hezelova, Zakaria Eltahir, Andrew Wotherspoon, Nicos Fotiadis, Maria Antonietta Bali, Chirag Nepal, Khurum Khan, Mark Stubbs, Jens C Hahne, Pierluigi Gasparini, Vincenza Guzzardo, Carlo M Croce, Suzanne Eccles, Matteo Fassan, David Cunningham, Jesper B Andersen, Paul Workman, Nicola Valeri, Chiara Braconi
BACKGROUND & AIMS: Cholangiocarcinomas (CCA) are resistant to chemotherapy, so new therapeutic agents are needed. We performed a screen to identify small molecule compounds that are active against CCAs. Levels of microRNA 21 (MIR21 or miRNA21) are increased in CCAs. We investigated whether miRNA21 mediates resistance of CCA cells and organoids to HSP90 inhibitors. METHODS: We performed a high-throughput screen of 484 small molecule compounds to identify those that reduced viability of 6 human CCA cell lines...
November 4, 2017: Gastroenterology
https://www.readbyqxmd.com/read/29100302/a-tyrosine-kinase-stat5-mir21-pdcd4-regulatory-axis-in-chronic-and-acute-myeloid-leukemia-cells
#8
Anne-Sophie Espadinha, Valérie Prouzet-Mauléon, Stéphane Claverol, Valérie Lagarde, Marc Bonneu, François-Xavier Mahon, Bruno Cardinaud
MicroRNAs (miRNAs) are regulators of several key patho-physiological processes, including cell cycle and apoptosis. Using microarray-based miRNA profiling in K562 cells, a model of chronic myeloid leukemia (CML), we found that the oncoprotein BCR-ABL1 regulates the expression of miR-21, an "onco-microRNA", found to be overexpressed in several cancers. This effect relies on the presence of two STAT binding sites on the promoter of miR-21, and on the phosphorylation status of STAT5, a transcription factor activated by the kinase activity of BCR-ABL1...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29059699/identification-of-the-genomic-region-under-epigenetic-regulation-during-nonalcoholic-fatty-liver-disease-progression
#9
Kikuko Hotta, Takuya Kitamoto, Aya Kitamoto, Yuji Ogawa, Yasushi Honda, Takaomi Kessoku, Masato Yoneda, Kento Imajo, Wataru Tomeno, Satoru Saito, Atsushi Nakajima
AIM: The progression of nonalcoholic fatty liver disease (NAFLD) is affected by epigenetics. We performed co-methylation and differentially methylated region (DMR) analyses to identify the genomic region that is under epigenetic regulation during NAFLD progression. METHODS: We collected liver biopsy specimens from 60 Japanese patients with NAFLD and classified these into mild (fibrosis stages 0-2) or advanced (fibrosis stages 3-4) NAFLD. We performed genome-wide DNA methylation analysis and identified the differentially methylated CpGs between mild and advanced NAFLD...
October 23, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28766461/hypermethylation-of-mir21-in-cd4-t-cells-from-patients-with-relapsing-remitting-multiple-sclerosis-associates-with-lower-mirna-21-levels-and-concomitant-up-regulation-of-its-target-genes
#10
Sabrina Ruhrmann, Ewoud Ewing, Eliane Piket, Lara Kular, Julio Cesar Cetrulo Lorenzi, Sunjay Jude Fernandes, Hiromasa Morikawa, Shahin Aeinehband, Sergi Sayols-Baixeras, Stella Aslibekyan, Devin M Absher, Donna K Arnett, Jesper Tegner, David Gomez-Cabrero, Fredrik Piehl, Maja Jagodic
BACKGROUND: Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system caused by genetic and environmental factors. DNA methylation, an epigenetic mechanism that controls genome activity, may provide a link between genetic and environmental risk factors. OBJECTIVE: We sought to identify DNA methylation changes in CD4+ T cells in patients with relapsing-remitting (RR-MS) and secondary-progressive (SP-MS) disease and healthy controls (HC)...
August 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28747550/a-tyrosine-kinase-stat5-mir21-pdcd4-regulatory-axis-in-chronic-and-acute-myeloid-leukemia-cells
#11
Anne-Sophie Espadinha, Valérie Prouzet-Mauléon, Stéphane Claverol, Valérie Lagarde, Marc Bonneu, François-Xavier Mahon, Bruno Cardinaud
MicroRNAs (miRNAs) are regulators of several key patho-physiological processes, including cell cycle and apoptosis. Using microarray-based miRNA profiling in K562 cells, a model of chronic myeloid leukemia (CML), we found that the oncoprotein BCR-ABL1 regulates the expression of miR-21, an "onco-microRNA", found to be overexpressed in several cancers. This effect relies on the presence of two STAT binding sites on the promoter of miR-21, and on the phosphorylation status of STAT5, a transcription factor activated by the kinase activity of BCR-ABL1...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28724379/regulation-of-glucose-uptake-in-lymphoma-cell-lines-by-c-myc-and-pi3k-dependent-signaling-pathways-and-impact-of-glycolytic-pathways-on-cell-viability
#12
Martina Broecker-Preuss, Nina Becher-Boveleth, Andreas Bockisch, Ulrich Dührsen, Stefan Müller
BACKGROUND: Changes in glucose and energy metabolism contribute to the altered phenotype of cancer cells and are the basis for positron emission tomography with (18)F-fluoro-2-deoxy-D-glucose (FDG) to visualize tumors in vivo. The molecular background of the enhanced glucose uptake and its regulation in lymphoma cells is not fully clarified and may provide new possibilities to reverse the altered metabolism. Thus in this study we investigated regulation of glucose uptake by different signaling pathways...
July 19, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28709088/integrated-amplified-aptasensor-with-in-situ-precise-preparation-of-copper-nanoclusters-for-ultrasensitive-electrochemical-detection-of-microrna-21
#13
Yijia Wang, Xinying Zhang, Lang Zhao, Ting Bao, Wei Wen, Xiuhua Zhang, Shengfu Wang
MicroRNA 21 (MIR21) has garnered much attention in recent years as an important disease biomarker. The detection of it in human system shows great significance for the healthy evaluation and major diseases early detection. Herein, a novel approach tactfully manipulates the in-situ precise preparation of copper nanoclusters on overlapping Y-shaped ds-DNA for MIR21 analysis were developed in the proposed integrated aptasensor. In the presence of target MIR21, overlapping Y-shaped ds-DNA was constructed on electrode...
July 5, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28637496/mir21-sensitized-b-lymphoma-cells-to-abt-199-via-icos-icosl-mediated-interaction-of-treg-cells-with-endothelial-cells
#14
Zhong Zheng, Peng-Peng Xu, Li Wang, Hui-Jin Zhao, Xiang-Qin Weng, Hui-Juan Zhong, Bin Qu, Jie Xiong, Yan Zhao, Xue-Feng Wang, Anne Janin, Wei-Li Zhao
BACKGROUND: MicroRNAs (miRs) are involved in tumor progression by regulating tumor cells and tumor microenvironment. MiR21 is overexpressed in diffuse large B-cell lymphoma (DLBCL) and its biological impact on tumor microenvironment remains unclear. METHODS: MiR21 was assessed by quantitative RT-PCR in patients with newly diagnosed DLBCL. The mechanism of action of miR21 on lymphoma progression and tumor angiogenesis was examined in vitro in B-lymphoma cell lines and in vivo in a murine xenograft model...
June 21, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28547797/vitamin-d-receptor-agonists-regulate-ocular-developmental-angiogenesis-and-modulate-expression-of-dre-mir-21-and-vegf
#15
Stephanie L Merrigan, Breandán N Kennedy
BACKGROUND AND PURPOSE: Pathological growth of ocular vasculature networks can underpin visual impairment in neovascular age-related macular degeneration, proliferative diabetic retinopathy and retinopathy of prematurity. Our aim was to uncover novel pharmacological regulators of ocular angiogenesis by phenotype-based screening in zebrafish. EXPERIMENTAL APPROACH: A bioactive chemical library of 465 drugs was screened to identify small molecule inhibitors of ocular hyaloid vasculature (HV) angiogenesis in zebrafish larvae...
August 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28512472/pulsed-electromagnetic-field-regulates-microrna-21-expression-to-activate-tgf-%C3%AE-signaling-in-human-bone-marrow-stromal-cells-to-enhance-osteoblast-differentiation
#16
Nagarajan Selvamurugan, Zhiming He, Daniel Rifkin, Branka Dabovic, Nicola C Partridge
Pulsed electromagnetic fields (PEMFs) have been documented to promote bone fracture healing in nonunions and increase lumbar spinal fusion rates. However, the molecular mechanisms by which PEMF stimulates differentiation of human bone marrow stromal cells (hBMSCs) into osteoblasts are not well understood. In this study the PEMF effects on hBMSCs were studied by microarray analysis. PEMF stimulation of hBMSCs' cell numbers mainly affected genes of cell cycle regulation, cell structure, and growth receptors or kinase pathways...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28447068/microrna-21-is-up-regulated-in-adipose-tissue-of-obese-diabetic-subjects
#17
Valeria Guglielmi, Monica D'Adamo, Rossella Menghini, Marina Cardellini, Paolo Gentileschi, Massimo Federici, Paolo Sbraccia
We investigated miR21 expression in omental (OAT) and subcutaneous adipose tissue (SAT) from 16 obese subjects undergoing bariatric surgery. Patients were divided into two age- and BMI-matched groups according to the presence of type 2 diabetes (T2D). miR21 was not differently expressed in OAT and SAT. However, miR21 expression was two folds greater in adipose tissue in patients with T2D. Accordingly, in primary cultures of adipocytes from non diabetic overweight subjects, miR21 expression increased after 24-h exposure to high glucose and insulin...
March 31, 2017: Nutrition and Healthy Aging
https://www.readbyqxmd.com/read/28437065/a-macrocyclic-peptide-ligand-binds-the-oncogenic-microrna-21-precursor-and-suppresses-dicer-processing
#18
Matthew D Shortridge, Matthew J Walker, Tom Pavelitz, Yu Chen, Wen Yang, Gabriele Varani
MicroRNAs (miRNAs) help orchestrate cellular growth and survival through post-transcriptional mechanisms. The dysregulation of miRNA biogenesis can lead to cellular growth defects and chemotherapeutic resistance and plays a direct role in the development of many chronic diseases. Among these RNAs, miR-21 is consistently overexpressed in most human cancers, leading to the down-regulation of key tumor-suppressing and pro-apoptotic factors, suggesting that inhibition of miR-21 biogenesis could reverse these negative effects...
June 16, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28407783/exosomal-transfer-of-tumor-associated-macrophage-derived-mir-21-confers-cisplatin-resistance-in-gastric-cancer-cells
#19
Peiming Zheng, Lei Chen, Xiangliang Yuan, Qin Luo, Yi Liu, Guohua Xie, Yanhui Ma, Lisong Shen
BACKGROUND: Cisplatin-based chemotherapy is frequently used to treat advanced gastric cancer (GC). However, the resistance often occurs with the mechanisms being not well understood. Recently, emerging evidence indicates that tumor-associated macrophages (TAMs) play an important role in chemoresistance of cancer. As the important mediators in intercellular communications, exosomes secreted by host cells mediate the exchange of genetic materials and proteins to be involved in tumor aggressiveness...
April 13, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28403739/hydrogen-peroxide-and-lipopolysaccharide-differentially-affect-the-expression-of-micrornas-10a-33a-21-221-in-endothelial-cells-before-and-after-coculture-with-monocytes
#20
COMPARATIVE STUDY
Atefe Ghamar Talepoor, Mehdi Kalani, Alamtaj Samsami Dahaghani, Mehrnoosh Doroudchi
Inflammation and oxidative stress are important risk factors affecting various cells in the formation of atherosclerosis. MicroRNAs (miRs) are regulators of inflammation and atherogenesis. The expressions of endothelial cell (EC)-specific miR-10a and miR-21 and monocyte-specific miR-33a and miR-221 were investigated using coculture of the ECs and monocytes upon exposure to H2O2 as an oxidative stressor, and endotoxin/lipopolysaccharide (LPS) as a microbial stressor. Human umbilical endothelial cells (HUVECs) and peripheral blood mononuclear cells (or monocytes) were cocultured in M199 complete medium and were incubated with LPS (20 ng/mL) or H2O2 (1%) for 8 hours at 37°C...
March 2017: International Journal of Toxicology
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