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Obesity mirna

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https://www.readbyqxmd.com/read/29769661/circulating-mir-374a-5p-is-a-potential-modulator-of-the-inflammatory-process-in-obesity
#1
Ayo P Doumatey, William J He, Amadou Gaye, Lin Lei, Jie Zhou, Gary H Gibbons, Adebowale Adeyemo, Charles N Rotimi
Obese individuals without expected metabolic co-morbidities are referred to as metabolically healthy obese (MHO). The molecular mechanisms underlying this phenotype remain elusive. MicroRNAs may be involved in the MHO phenotype. To test this hypothesis, we screened 179 serum miRNAs in 20 African-American women (10 MHOs and 10 metabolically abnormal obese individuals -MAO). We identified 8 differentially expressed miRNAs (DEMs) with validation in an independent sample of 64 MHO and 34 MAO. Of the eight DEMs in the screening phase (p ≤ 0...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29764990/ire1%C3%AE-prevents-hepatic-steatosis-by-processing-and-promoting-the-degradation-of-select-micrornas
#2
Jie-Mei Wang, Yining Qiu, Zhao Yang, Hyunbae Kim, Qingwen Qian, Qinghua Sun, Chunbin Zhang, Lei Yin, Deyu Fang, Sung Hong Back, Randal J Kaufman, Ling Yang, Kezhong Zhang
Obesity or a high-fat diet represses the endoribonuclease activity of inositol-requiring enzyme 1α (IRE1α), a transducer of the unfolded protein response (UPR) in cells under endoplasmic reticulum (ER) stress. An impaired UPR is associated with hepatic steatosis and nonalcoholic fatty liver disease (NAFLD), which is caused by lipid accumulation in the liver. We found that IRE1α was critical to maintaining lipid homeostasis in the liver by repressing the biogenesis of microRNAs (miRNAs) that regulate lipid mobilization...
May 15, 2018: Science Signaling
https://www.readbyqxmd.com/read/29758288/micrornas-in-brown-and-beige-fat
#3
REVIEW
Deborah Goody, Alexander Pfeifer
Brown adipose tissue (BAT) dissipates energy as heat and its activity correlates with leanness in human adults. Understanding the mechanisms behind the activation of BAT and the process of "browning", i.e. the appearance of inducible brown adipocytes called beige or brite (brown-in-white) cells in white adipose tissue (WAT), is of great interest for developing novel therapies to combat obesity. MicroRNAs (miRNAs) are small transcriptional regulators that control gene expression in a variety of tissues, including WAT and BAT...
May 11, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29753771/mir-199a-3p-regulates-brown-adipocyte-differentiation-through-mtor-signaling-pathway
#4
Yao Gao, Yan Cao, Xianwei Cui, Xingyun Wang, Yahui Zhou, Fangyan Huang, Xing Wang, Juan Wen, Kaipeng Xie, Pengfei Xu, Xirong Guo, Lianghui You, Chenbo Ji
Recent discoveries of functional brown adipocytes in mammals illuminates their therapeutic potential for combating obesity and its associated diseases. However, on account of the limited amount and activity in adult humans of brown adipocyte depots, identification of miRNAs and characterization their regulatory roles in human brown adipogenesis are urgently needed. This study focused on the role of microRNA (miR)-199a-3p in human brown adipocyte differentiation and thermogenic capacity. A decreased expression pattern of miR-199a-3p was consistently observed during the differentiation course of brown adipocytes in mice and humans...
May 10, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29751019/nighttime-light-exposure-enhances-rev-erb%C3%AE-targeting-micrornas-and-contributes-to-hepatic-steatosis
#5
Patricia C Borck, Thiago M Batista, Jean F Vettorazzi, Gabriela M Soares, Camila Lubaczeuski, Dongyin Guan, Antonio C Boschero, Elaine Vieira, Mitchell A Lazar, Everardo M Carneiro
OBJECTIVE: The exposure to artificial light at night (ALAN) disrupts the biological rhythms and has been associated with the development of metabolic syndrome. MicroRNAs (miRNAs) display a critical role in fine-tuning the circadian system and energy metabolism. In this study, we aimed to assess whether altered miRNAs expression in the liver underlies metabolic disorders caused by disrupted biological rhythms. RESULTS: We found that C3H/HePas mice exposed to ALAN developed obesity, and hepatic steatosis, which was paralleled by decreased expression of Rev-erbα and up-regulation of its lipogenic targets ACL and FAS in liver...
May 8, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29746886/exercise-training-prevents-obesity-associated-disorders-role-of-mirna-208a-and-med13
#6
Tiago Fernandes, Diego Lopes Barretti, M Ian Phillips, Edilamar Menezes de Oliveira
Exercise training (ET) has been established as an important treatment for obesity, since it counteracts aberrant cardiac metabolism and weight gain; however, underlying mechanisms remain to be further determined. MicroRNAs (miRNAs) inhibit protein expression by base-pairing with the 3' UTRs of mRNA targets. MiRNA-208a is a cardiac-specific miRNA that regulates β-MHC content and systemic energy homeostasis via MED13. We investigated whether ET regulates the cardiac miRNA-208a and its target MED13, reducing the weight gain and β-MHC expression in obese Zucker rats (OZR)...
May 7, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29734990/exosomal-cargo-properties-endothelial-function-and-treatment-of-obesity-hypoventilation-syndrome-a-proof-of-concept-study
#7
Rakesh Bhattacharjee, Abdelnaby Khalyfa, Ahamed A Khalyfa, Babak Mokhlesi, Leila Kheirandish-Gozal, Isaac Almendros, Eduard Peris, Atul Malhotra, David Gozal
STUDY OBJECTIVES: Longitudinal studies support the usage of positive airway pressure (PAP) therapy in treating obstructive sleep apnea (OSA) to improve cardiovascular disease. However, the anticipated benefit is not ubiquitous. In this study, we elucidate whether PAP therapy leads to immediate improvements on endothelial function, a subclinical marker of cardiovascular status, by examining the effect of circulating exosomes, isolated from patients before and after PAP therapy, on naive endothelial cells...
April 30, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29734116/polyphenol-rich-green-tea-extract-improves-adipose-tissue-metabolism-by-down-regulating-mir-335-expression-and-mitigating-insulin-resistance-and-inflammation
#8
Rosemari Otton, Anaysa Paola Bolin, Leticia Torres Ferreira, Marcelo Paradiso Marinovic, Andrea Livia Silva Rocha, Marcelo Alves Mori
Obesity leads to changes in miRNA expression in adipose tissue, and this modulation is linked to the pathophysiology of the disease. Green tea (GT) is a natural source of polyphenols that have been shown to confer health benefits, particularly preventing metabolic diseases. Here, we investigated if the beneficial effects of GT in obesity results from changes in the miRNA profile in white adipose tissue. GT treatment [500 mg/body weight (BW)/12 weeks] increased energy expenditure of high-fat diet-fed mice (16 weeks), leading to reduced weight gain, decreased adiposity, reduced inflammation and improved insulin sensitivity...
April 7, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29729889/the-inflammatory-state-of-adipose-tissue-is-not-affected-by-the-anti-inflammatory-response-of-the-a2a-adenosine-system-and-mir-221-pten
#9
J D Cortés-Garcia, M Briones-Espinoza, M Vega-Cárdenas, V M Ruíz-Rodríguez, A Mendez-Mancilla, Arturo E Gómez-Otero, J M Vargas Morales, M H García-Hernández, D P Portales-Pérez
Obesity is a chronic inflammatory state with cytokines, adipokines, and miRNAs. The A2a-adenosine system decreases activation and cytokine release in immune cells. MiR-221 is upregulated in carcinogenesis and inflammatory processes, where its targets PTEN and ETS-1, negatively regulates the Akt pathway and induces the release of pro-inflammatory cytokines, respectively. However, the roles of the A2a-adenosine system and miR-221 in adipose tissue are unknown. The aim of this work was to evaluate the A2a-adenosine and miRNA pathways as immune modulators in adipose tissue...
May 3, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29721017/elevated-and-correlated-expressions-of-mir-24-mir-30d-mir-146a-and-sfrp-4-in-human-abdominal-adipose-tissue-play-a-role-in-adiposity-and-insulin-resistance
#10
Yury O Nunez Lopez, Gabriella Garufi, Magdalena Pasarica, Attila A Seyhan
Objective: We explored the relationships among microRNAs (miRNAs) and SFRP4, as they relate to adipose tissue functions including lipolysis, glucose and glycerol turnover, and insulin sensitivity. Methods: Abdominal adipose tissue (AbdAT) levels of thirteen microRNAs (miRNAs), SFRP4, and VEGF in lean nondiabetic subjects ( n = 7), subjects with obesity ( n = 5), and subjects with obesity and type 2 diabetes (T2DM) ( n = 5) were measured by qPCR. Insulin sensitivity was measured by the euglycemic-hyperinsulinemic clamp...
2018: International Journal of Endocrinology
https://www.readbyqxmd.com/read/29693219/reduction-of-premature-aging-markers-after-gastric-bypass-surgery-in-morbidly-obese-patients
#11
P J Hohensinner, C Kaun, B Ebenbauer, M Hackl, S Demyanets, D Richter, M Prager, J Wojta, Gersina Rega-Kaun
BACKGROUND: Obesity is considered to be a major comorbidity. Obese patients suffer from an increased proinflammatory state associated with a premature aging phenotype including increased secretion of senescence-associated secretory proteins (SASP) and reduced telomere length. Micro-ribonucleic acids (miRNAs) are non-coding RNA molecules that could modify the post-transcriptional process. Several studies have reported associations between miRNAs and metabolic unhealthy conditions. AIM: To determine if bariatric surgery and the resulting weight loss could reverse the premature aging phenotype...
April 25, 2018: Obesity Surgery
https://www.readbyqxmd.com/read/29692333/mir-33-a-metabolic-conundrum
#12
Anders M Näär
The miR-33 microRNAs (miRNAs) are crucial regulators of cholesterol/lipids, and may represent therapeutic targets for the treatment of atherosclerosis. A recent report by Price et al. showed that miR-33 knockout (KO) mice exhibit obesity, insulin resistance, and increased food intake, suggesting that metabolic regulation by miR-33 is more complex than was previously known.
April 21, 2018: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/29680375/n-6-methyladenosine-mediates-the-cellular-proliferation-and-apoptosis-via-micrornas-in-arsenite-transformed-cells
#13
Shiyan Gu, Donglei Sun, Huangmei Dai, Zunzhen Zhang
N6 -methyladenosine (m6 A) modification is implicated to play an important role in cellular biological processes, but its regulatory mechanisms in arsenite-induced carcinogenesis are largely unknown. Here, human bronchial epithelial(HBE)cells were chronically treated with 2.5 μM arsenite sodium (NaAsO2 ) for about 13 weeks and these cells were identified with malignant phenotype which was demonstrated by increased levels of cellular proliferation, percentages of plate colony formation and soft agar clone formation, and high potential of resistance to apoptotic induction...
April 19, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29649689/high-fat-diet-alters-pas-kinase-regulation-by-fasting-and-feeding-in-liver
#14
Ana Pérez-García, Pilar Dongil, Verónica Hurtado-Carneiro, Enrique Blázquez, Carmen Sanz, Elvira Álvarez
The prevalence of overweight and obesity in the population, along with their associated complications, is a major factor contributing to increased morbidity and mortality in developed countries. The liver is a vital organ for maintaining metabolic homeostasis, especially in the adjustment periods in fasting and feeding. Per-Arnt-Sim (PAS) kinase (PASK) controls glucose homeostasis and energy metabolism in response to nutritional status. PASK-deficient mice with a high-fat diet (HFD) resist the development of obesity and hepatic steatosis, with improved insulin sensitivity...
March 12, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29625129/a-negative-feedback-loop-between-microrna-378-and-nrf1-promotes-the-development-of-hepatosteatosis-in-mice-treated-with-a-high-fat-diet
#15
Tianpeng Zhang, Xiaoling Zhao, Clifford J Steer, Guiqin Yan, Guisheng Song
BACKGROUNDS: The incidence of nonalcoholic fatty liver disease (NAFLD) is rapidly increasing due to the prevalence of obesity. NAFLD is a major risk factor of hepatocellular carcinoma (HCC). Even with successful surgical removal, the presence of NAFLD is associated with an increased recurrence of HCC. Despite the extensive study of NAFLD, its underlying mechanism(s) remains essentially unknown and there are no FDA-approved drugs for its treatment. Alterations in microRNA (miR) expression have been observed in human fatty livers...
April 3, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29620215/integrated-analysis-of-the-gene-expression-profile-and-dna-methylation-profile-of-obese-patients-with-type-2-diabetes
#16
Juan Shen, Bin Zhu
In order to better understand the etiology of obese type 2 diabetes (T2D) at the molecular level, the present study investigated the gene expression and DNA methylation profiles associated with T2D via systemic analysis. Gene expression (GSE64998) and DNA methylation profiles (GSE65057) from liver tissues of healthy controls and obese patients with T2D were downloaded from the Gene Expression Omnibus database. Differentially‑expressed genes (DEGs) and differentially‑methylated genes (DMGs) were identified using the Limma package, and their overlapping genes were additionally determined...
March 28, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29615793/association-between-hypertension-and-circulating-vascular-related-micrornas
#17
Jamie G Hijmans, Kyle J Diehl, Tyler D Bammert, Philip J Kavlich, Grace M Lincenberg, Jared J Greiner, Brian L Stauffer, Christopher A DeSouza
microRNAs (miRNAs) have a key role in regulating inflammation, vascular health and in turn, cardiovascular disease. Specifically, altered circulating expression of miR-17, miR-21, miR-34a, miR-92a, miR-126, miR-145, miR-146a, and miR-150 has been linked with the pathogenesis and progression of cardiovascular disease. The aim of this study was to determine whether the circulating profile of these vascular-related miRNAs is disrupted with hypertension. Thirty sedentary, middle-aged adults were studied: 15 normotensive (10M/5F; age: 56 ± 1 year; BP: 113/71 ± 2/1 mmHg) and 15 hypertensive (10M/5F; 56 ± 2 year; 140/87 ± 2/2 mmHg)...
April 4, 2018: Journal of Human Hypertension
https://www.readbyqxmd.com/read/29605715/a-computational-biology-approach-of-a-genome-wide-screen-connected-mirnas-to-obesity-and-type-2-diabetes
#18
Pascal Gottmann, Meriem Ouni, Sophie Sausenthaler, Julian Roos, Laura Stirm, Markus Jähnert, Anne Kamitz, Nicole Hallahan, Wenke Jonas, Andreas Fritsche, Hans-Ulrich Häring, Harald Staiger, Matthias Blüher, Pamela Fischer-Posovszky, Heike Vogel, Annette Schürmann
OBJECTIVE: Obesity and type 2 diabetes (T2D) arise from the interplay between genetic, epigenetic, and environmental factors. The aim of this study was to combine bioinformatics and functional studies to identify miRNAs that contribute to obesity and T2D. METHODS: A computational framework (miR-QTL-Scan) was applied by combining QTL, miRNA prediction, and transcriptomics in order to enhance the power for the discovery of miRNAs as regulative elements. Expression of several miRNAs was analyzed in human adipose tissue and blood cells and miR-31 was manipulated in a human fat cell line...
March 15, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29560554/effects-of-exosomes-from-lps-activated-macrophages-on-adipocyte-gene-expression-differentiation-and-insulin-dependent-glucose-uptake
#19
Nicolás De Silva, Mirian Samblas, J Alfredo Martínez, Fermín I Milagro
Obesity is usually associated with low-grade inflammation, which determines the appearance of comorbidities like atherosclerosis and insulin resistance. Infiltrated macrophages in adipose tissue are partly responsible of this inflammatory condition. Numerous studies point to the existence of close intercommunication between macrophages and adipocytes and pay particular attention to the proinflammatory cytokines released by both cell types. However, it has been recently described that in both, circulation and tissue level, there are extracellular vesicles (including microvesicles and exosomes) containing miRNAs, mRNAs, and proteins that can influence the inflammatory response...
March 20, 2018: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29534467/expanding-the-utilization-of-formalin-fixed-paraffin-embedded-archives-feasibility-of-mir-seq-for-disease-exploration-and-biomarker-development-from-biopsies-with-clear-cell-renal-cell-carcinoma
#20
Philipp Strauss, Hans-Peter Marti, Christian Beisland, Andreas Scherer, Vegard Lysne, Sabine Leh, Arnar Flatberg, Even Koch, Vidar Beisvag, Lea Landolt, Trude Skogstrand, Øystein Eikrem
Novel predictive tools for clear cell renal cell carcinoma (ccRCC) are urgently needed. MicroRNAs (miRNAs) have been increasingly investigated for their predictive value, and formalin-fixed paraffin-embedded biopsy archives may potentially be a valuable source of miRNA sequencing material, as they remain an underused resource. Core biopsies of both cancerous and adjacent normal tissues were obtained from patients ( n = 12) undergoing nephrectomy. After small RNA-seq, several analyses were performed, including classifier evaluation, obesity-related inquiries, survival analysis using publicly available datasets, comparisons to the current literature and ingenuity pathway analyses...
March 10, 2018: International Journal of Molecular Sciences
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