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miR-34a

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https://www.readbyqxmd.com/read/28731182/il%C3%A2-6-stat3-mir%C3%A2-34a-protects-against-neonatal-lung-injury-patients
#1
Huajun Liu, Wenbin Liu, Xueqing Tang, Taisen Wang, Xianlin Sun, Jie Lv
The present study aimed to investigate the protective role of the interleukin (IL)‑6/signal transducer and activator of transcription 3 (STAT3)/microRNA (miR)‑34a signaling pathway in patients with neonatal lung injury (NLI) and the underlying molecular mechanisms of these effects. It was demonstrated that miR‑34a serum expression was significantly upregulated in patients and mice with NLI. Meanwhile, IL‑6 and phosphorylated‑STAT3 protein expression, and tumor necrosis factor (TNF)‑α, IL‑1β and IL‑18 activity levels in NLI mice were significantly induced compared with the normal control group...
July 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28721584/mir-34a-attenuates-glioma-cells-progression-and-chemoresistance-via-targeting-pd-l1
#2
Yi Wang, Li Wang
OBJECTIVE: To investigate the roles of miR-34a in progression and chemoresistance of glioma cells. RESULTS: Quantitative real-time PCR analysis showed that miR-34a level was lower, but PD-L1 expression level was higher in glioma tissue specimens compared with normal brain tissues and their expression levels were negatively correlated. Ectopic expression of miR-34a inhibited glioma cell proliferation, promoted cell cycle arrest in G1/S phase and cell apoptosis. Additionally, miR-34a/PD-L1 axis was again confirmed and co-expression of PD-L1 with miR-34a mimics attenuated the effects of miR-34a on cell proliferation and apoptosis in glioma cells...
July 18, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28720782/dysregulated-mirnas-and-their-pathogenic-implications-for-the-neurometabolic-disease-propionic-acidemia
#3
Ana Rivera-Barahona, Alejandro Fulgencio-Covián, Celia Pérez-Cerdá, Ricardo Ramos, Michael A Barry, Magdalena Ugarte, Belén Pérez, Eva Richard, Lourdes R Desviat
miRNome expression profiling was performed in a mouse model of propionic acidemia (PA) and in patients' plasma samples to investigate the role of miRNAs in the pathophysiology of the disease and to identify novel biomarkers and therapeutic targets. PA is a potentially lethal neurometabolic disease with patients developing neurological deficits and cardiomyopathy in the long-term, among other complications. In the PA mouse liver we identified 14 significantly dysregulated miRNAs. Three selected miRNAs, miR-34a-5p, miR-338-3p and miR-350, were found upregulated in brain and heart tissues...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717596/phenotypic-and-microrna-transcriptomic-profiling-of-the-mda-mb-231-spheroid-enriched-cscs-with-comparison-of-mcf-7-microrna-profiling-dataset
#4
Lily Boo, Wan Yong Ho, Norlaily Mohd Ali, Swee Keong Yeap, Huynh Ky, Kok Gan Chan, Wai Fong Yin, Dilan Amila Satharasinghe, Woan Charn Liew, Sheau Wei Tan, Soon Keng Cheong, Han Kiat Ong
Breast cancer spheroids have been widely used as in vitro models of cancer stem cells (CSCs), yet little is known about their phenotypic characteristics and microRNAs (miRNAs) expression profiles. The objectives of this research were to evaluate the phenotypic characteristics of MDA-MB-231 spheroid-enriched cells for their CSCs properties and also to determine their miRNAs expression profile. Similar to our previously published MCF-7 spheroid, MDA-MB-231 spheroid also showed typical CSCs characteristics namely self-renewability, expression of putative CSCs-related surface markers and enhancement of drug resistance...
2017: PeerJ
https://www.readbyqxmd.com/read/28717128/mother-s-pre-pregnancy-bmi-and-placental-candidate-mirnas-findings-from-the-environage-birth-cohort
#5
Maria Tsamou, Dries S Martens, Ellen Winckelmans, Narjes Madhloum, Bianca Cox, Wilfried Gyselaers, Tim S Nawrot, Karen Vrijens
There is increasing evidence that the predisposition for development of chronic diseases arises at the earliest times of life. In this context, maternal pre-pregnancy weight might modify fetal metabolism and the child's predisposition to develop disease later in life. The aim of this study is to investigate the association between maternal pre-pregnancy body mass index (BMI) and miRNA alterations in placental tissue at birth. In 211 mother-newborn pairs from the ENVIRONAGE birth cohort, we assessed placental expression of seven miRNAs important in crucial cellular processes implicated in adipogenesis and/or obesity...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28713966/spica-prunellae-extract-suppresses-the-growth-of-human-colon-carcinoma-cells-by-targeting-multiple-oncogenes-via-activating-mir-34a
#6
Yi Fang, Ling Zhang, Jianyu Feng, Wei Lin, Qiaoyan Cai, Jun Peng
Spica Prunellae is the spike of the herb Prunella vulgaris L. in traditional Chinese medicine which is often used for the treatment of various cancers including colorectal cancer. In the present study, we found that a key tumor suppressor, microRNA-34a (miR-34a) is involved in the antitumor activity for Spica Prunellae. Human colon carcinoma HCT-8 cells treated with an ethanol extract of Spica Prunellae (EESP) had significantly decreased cell proliferation and viability, in a dose-dependent manner. Flow cytometry analysis with Annexin V/PI staining analysis revealed that EESP treatment could induce apoptosis of HCT-8 cells...
July 6, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28710020/nrf2-deficiency-exacerbates-ochratoxin-a-induced-toxicity-in-vitro-and-in-vivo
#7
Agnieszka Loboda, Anna Stachurska, Mateusz Sobczak, Paulina Podkalicka, Olga Mucha, Alicja Jozkowicz, Jozef Dulak
Several mechanisms are postulated to be responsible for nephrotoxic and nephrocarcinogenic activities of mycotoxin and food contaminant, ochratoxin A (OTA). Although Nrf2 transcription factor was suggested to be involved in OTA-mediated renal injury, comprehensive study evaluating the effect of OTA toxicity in Nrf2 knock-out mice with special regard to sex-dependency has not been performed yet. Our results clearly show exacerbated OTA toxicity in porcine tubular epithelial cells after shRNA-mediated Nrf2 inhibition as well as in proximal tubular cells isolated from Nrf2(-/-)male mice in comparison to cells derived from their wild-type counterparts...
July 11, 2017: Toxicology
https://www.readbyqxmd.com/read/28709867/attenuation-of-the-hypoxia-induced-mir-34a-protects-cardiomyocytes-through-maintenance-of-glucose-metabolism
#8
Zai-Cun Wang, Zun-Zhe Wang, Huan-Ju Ma, Chen-Chen Wang, Hua-Ting Wang
Ischemic injury in the heart is associated with death of cardiomyocytes and even after decades of research there is no appropriate therapeutic intervention to treat ischemic injury. The microRNA miR-34a is known to be induced in cardiomyocytes following ischemic injury. Another hallmark of ischemic injury is impaired glycolysis. The objective of the current study was to investigate the effects of short- and long-term exposure to hypoxia on miR-34a expression on apoptosis and regulation of key glycolysis metabolic enzymes...
July 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28708282/the-mechanism-of-long-non-coding-rna-meg3-for-hepatic-ischemia-reperfusion-mediated-by-mir-34a-nrf2-signaling-pathway
#9
Xinli Huang, Yun Gao, Jianjie Qin, Sen Lu
OBJECTIVE: To investigate the function of MEG3 in hepatic ischemia-reperfusion (HIR) progress, involving its association with the level of miR-34a during hypoxia-induced hypoxia re-oxygenation (H/R) in vitro. METHODS: HIR mice model in vivo was established.MEG3 , miR-34a expression, along with Nrf2 mRNA and protein level were detected in tissues and cells. Serum biochemical parameters (ALT and AST) were assessed in vivo. A potential binding region between MEG3 and miR34a was confirmed by luciferase assays...
July 14, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28699360/mir-34a-and-mir-9-are-overexpressed-and-sirt-genes-are-downregulated-in-peripheral-blood-mononuclear-cells-of-aging-humans
#10
Magdalena Owczarz, Monika Budzinska, Anna Domaszewska-Szostek, Joanna Borkowska, Jacek Polosak, Magdalena Gewartowska, Przemyslaw Slusarczyk, Monika Puzianowska-Kuznicka
Increased expression of sirtuins lowers the risk of age-related diseases, while their role in the regulation of longevity is not firmly established. Since aging is associated with immunosenescence, we tested whether sirtuin expression was modified in peripheral blood mononuclear cells (PBMC) in an age-related manner and whether this might result from altered expression of the selected miRNAs. The expression of seven SIRT genes and of SIRT1 mRNA-interacting miR-9, miR-34a, miR-132, and miR-199a-5p was evaluated by real-time PCR in PBMC originating from young (Y, n = 57, mean age 27 ± 4...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28691019/fish-oil-feeding-modulates-the-expression-of-hepatic-micrornas-in-a-western-style-diet-induced-nonalcoholic-fatty-liver-disease-rat-model
#11
Hualin Wang, Yang Shao, Fahu Yuan, Han Feng, Na Li, Hongyu Zhang, Chaodong Wu, Zhiguo Liu
Nonalcoholic fatty liver disease (NAFLD) is one of the most prevalent chronic liver diseases worldwide. Recent studies have indicated that fish oil supplementation has benefits against NAFLD. Our previous transcriptomic study has validated the effect of fish oil supplementation on altering hepatic gene expression in a NAFLD rat model. In the current study, we examined the effects of fish oil on the expression of hepatic microRNAs. Male Sprague-Dawley rats were fed with a lab chow (CON), high-fat high-cholesterol diet (WD), or WD supplemented with fish oil (FOH), respectively...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28688900/mir-34a-sirtuin-1-foxo3a-is-involved-in-genistein-protecting-against-ox-ldl-induced-oxidative-damage-in-huvecs
#12
Huaping Zhang, Zhenxiang Zhao, Xuefen Pang, Jian Yang, Haixia Yu, Yinhong Zhang, Hui Zhou, Jiahui Zhao
The antioxidant activity of genistein is associated with preventing atherosclerosis; however, the underlying mechanisms are not fully understood. In this study, human umbilical vein endothelial cells (HUVECs) were pretreated with genistein at different concentrations (10nM, 100nM and 1000nM) for 6h and then exposed to ox-LDL (50mg/L) for another 24h. Results showed that genistein restrained reactive oxygen species (ROS) and malondialdehyde (MDA) production, and ameliorated the inhibitory effect on superoxide dismutase (SOD), catalase (CAT), glutathione (GSH) and glutathione peroxidase (GPx) activity elicited by ox-LDL stimulation...
July 5, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28679150/microarray-based-bioinformatics-analysis-of-the-combined-effects-of-sinps-and-pbac-on-cardiovascular-system-in-zebrafish
#13
Hejing Hu, Yannan Zhang, Yanfeng Shi, Lin Feng, Junchao Duan, Zhiwei Sun
With rapid development of nanotechnology and growing environmental pollution, the combined toxic effects of SiNPs and pollutants of heavy metals like lead have received global attentions. The aim of this study was to explore the cardiovascular effects of the co-exposure of SiNPs and lead acetate (PbAc) in zebrafish using microarray and bioinformatics analysis. Although there was no other obvious cardiovascular malformation except bleeding phenotype, bradycardia, angiogenesis inhibition and declined cardiac output in zebrafish co-exposed of SiNPs and PbAc at NOAEL level, significant changes were observed in mRNA and microRNA (miRNA) expression patterns...
June 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/28674420/improved-risk-stratification-in-prevention-by-use-of-a-panel-of-selected-circulating-micrornas
#14
Till Keller, Jes-Niels Boeckel, Stefan Groß, Jens Klotsche, Lars Palapies, David Leistner, Lars Pieper, Günnter K Stalla, Hendrik Lehnert, Sigmund Silber, David Pittrow, Winfried Maerz, Marcus Dörr, Hans-Ulrich Wittchen, Sebastian E Baumeister, Uwe Völker, Stephan B Felix, Stefanie Dimmeler, Andreas M Zeiher
Risk stratification is crucial in prevention. Circulating microRNAs have been proposed as biomarkers in cardiovascular disease. Here a miR panel consisting of miRs related to different cardiovascular pathophysiologies, was evaluated to predict outcome in the context of prevention. MiR-34a, miR-223, miR-378, miR-499 and miR-133 were determined from peripheral blood by qPCR and combined to a risk panel. As derivation cohort, 178 individuals of the DETECT study, and as validation cohort, 129 individuals of the SHIP study were used in a case-control approach...
July 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28668331/total-abdominal-irradiation-exposure-impairs-cognitive-function-involving-mir-34a-5p-bdnf-axis
#15
Ming Cui, Huiwen Xiao, Yuan Li, Jiali Dong, Dan Luo, Hang Li, Guoxing Feng, Haichao Wang, Saijun Fan
Radiotherapy is often employed to treat abdominal and pelvic malignancies, but is frequently accompanied by diverse acute and chronic local injuries. It was previously unknown whether abdominal and pelvic radiotherapy impairs distant cognitive dysfunction. In the present study, we demonstrated that total abdominal irradiation (TAI) exposure caused cognitive deficits in mouse models. Mechanically, microarray assay analysis revealed that TAI elevated the expression level of miR-34a-5p in small intestine tissues and peripheral blood (PD), which targeted the 3'UTR of Brain-derived neurotrophic factor (Bdnf) mRNA in hippocampus to mediate cognitive dysfunction...
June 29, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28667334/3-utr-polymorphisms-of-carbonic-anhydrase-ix-determine-the-mir-34a-targeting-efficiency-and-prognosis-of-hepatocellular-carcinoma
#16
Kuo-Tai Hua, Yu-Fan Liu, Chia-Lang Hsu, Tsu-Yao Cheng, Ching-Yao Yang, Jeng-Shou Chang, Wei-Jiunn Lee, Michael Hsiao, Hsueh-Fen Juan, Ming-Hsien Chien, Shun-Fa Yang
Carbonic anhydrase IX (CA9) expression level has been considered as a poor prognostic factor in hepatocellular carcinoma (HCC) patients. However, the judging criteria of CA9 level is hard to define for potential clinical applications. Unlike CA9 expression level, CA9 polymorphism is poorly documented in HCC. Here, we found that people carry A allele at CA9 rs1048638, a 3'UTR SNP, has higher risk of HCC. rs1048638-CA correlates with advanced stages, larger tumor sizes, more vascular invasion, and shorter survival of HCC patients...
June 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28667294/0404-inhibits-hepatocellular-carcinoma-through-a-p53-mir-34a-sirt1-positive-feedback-loop
#17
Caixia Xia, Liyan Shui, Guohua Lou, Bingjue Ye, Wei Zhu, Jing Wang, Shanshan Wu, Xiao Xu, Long Mao, Wanhong Xu, Zhi Chen, Yanning Liu, Min Zheng
DNA-damaging agents have been used in cancer chemotherapy for a long history. Unfortunately, chemotherapeutic treatment strategies against hepatocellular carcinoma (HCC) are still ineffective. We screened a novel DNA-damaging compound, designated as 0404, by using time-dependent cellular response profiling (TCRP) based on unique DNA-damage characteristics. We used human HCC cell lines and HCC xenograft mouse model to analyze the anti-cancer effects of 0404. Transcriptome and miRNA arrays were used to verify the anti-cancer mechanism of 0404...
June 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28665018/extracellular-vesicles-mediate-intercellular-communication-transfer-of-functionally-active-micrornas-by-microvesicles-into-phagocytes
#18
Laura Claßen, Lars-Oliver Tykocinski, Felix Wiedmann, Carolin Birr, Petra Schiller, Christine Tucher, Stefan Krienke, Marc-Steffen Raab, Norbert Blank, Hanns-Martin Lorenz, Martin Schiller
Cell activation and apoptosis lead to the formation of extracellular vesicles (EVs) such as exosomes or microvesicles (MVs). EVs have been shown to modulate immune responses; recently, MVs were described to carry microRNA (miRNA) and a role for MVs in the pathogenesis of autoimmune diseases has been discussed. Here we systematically characterized MVs and exosomes according to their release stimuli. The miRNA content of viable or apoptotic human T lymphocytes and the corresponding MVs was analyzed. miRNA, protein and surface marker expression, as well as cytokine release by human monocytes was measured after EV engulfment...
June 30, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28658612/senescence-associated-micrornas-target-cell-cycle-regulatory-genes-in-normal-human-lung-fibroblasts
#19
Georgios S Markopoulos, Eugenia Roupakia, Maria Tokamani, George Vartholomatos, Theodore Tzavaras, Maria Hatziapostolou, Frank O Fackelmayer, Raphael Sandaltzopoulos, Christos Polytarchou, Evangelos Kolettas
Senescence recapitulates the ageing process at the cell level. A senescent cell stops dividing and exits the cell cycle. MicroRNAs (miRNAs) acting as master regulators of transcription, have been implicated in senescence. In the current study we investigated and compared the expression of miRNAs in young versus senescent human fibroblasts (HDFs), and analysed the role of mRNAs expressed in replicative senescent HFL-1 HDFs. Cell cycle analysis confirmed that HDFs accumulated in G1/S cell cycle phase. Nanostring analysis of isolated miRNAs from young and senescent HFL-1 showed that a distinct set of 15 miRNAs were significantly up-regulated in senescent cells including hsa-let-7d-5p, hsa-let-7e-5p, hsa-miR-23a-3p, hsa-miR-34a-5p, hsa-miR-122-5p, hsa-miR-125a-3p, hsa-miR-125a-5p, hsa-miR-125b-5p, hsa-miR-181a-5p, hsa-miR-221-3p, hsa-miR-222-3p, hsa-miR-503-5p, hsa-miR-574-3p, hsa-miR-574-5p and hsa-miR-4454...
June 27, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28657476/comparison-of-peptide-and-lipid-based-delivery-of-mir-34a-5p-mimic-into-ppc-1-cells
#20
Egon Urgard, Aleksei Brjalin, Ülo Langel, Margus Pooga, Ana Rebane, Tarmo Annilo
The microRNA (miRNA) microRNA-34a (miR-34a) regulates a number of genes involved in cell cycle control and is therefore considered to have a high therapeutic potential. MiR-34a expression is often downregulated in cancer cells and its restoration has been shown to exert a tumor-suppressive effect. However, effective and safe delivery of synthetic miRNA analogs into cancer cells remains a challenge. The aim of this study was to evaluate cell-penetrating peptide PepFect (PF)14 as a carrier for delivery of miR-34a-5p into human primary prostate carcinoma-1 (PPC-1) cells...
June 28, 2017: Nucleic Acid Therapeutics
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