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https://www.readbyqxmd.com/read/28494015/long-non-coding-rna-lethe-regulates-hyperglycemia-induced-reactive-oxygen-species-production-in-macrophages
#1
Carlos Zgheib, Maggie M Hodges, Junyi Hu, Kenneth W Liechty, Junwang Xu
Type 2 diabetes mellitus is a complex, systemic metabolic disease characterized by insulin resistance and resulting hyperglycemia, which is associated with impaired wound healing. The clinical complications associated with hyperglycemia are attributed, in part, to the increased production of reactive oxygen species (ROS). Recent studies revealed that long non-coding RNAs (lncRNAs) play important regulatory roles in many biological processes. Specifically, lncRNA Lethe has been described as exhibiting an anti-inflammatory effect by binding to the p65 subunit of NFκB and blocking its binding to DNA and the subsequent activation of downstream genes...
2017: PloS One
https://www.readbyqxmd.com/read/28483659/the-long-non-coding-rna-neat1-is-an-important-mediator-of-the-therapeutic-effect-of-bexarotene-on-traumatic-brain-injury-in-mice
#2
Jianjun Zhong, Li Jiang, Zhijian Huang, Hongrong Zhang, Chongjie Cheng, Han Liu, Junchi He, Jingchuan Wu, Rami Darwazeh, Yue Wu, Xiaochuan Sun
OBJECTIVE: Bexarotene treatments exert neuroprotective effects on mice following traumatic brain injury (TBI). The present study aims to investigate the potential roles of the long noncoding RNA Neat1 in the neuroprotective effects of bexarotene. MATERIALS AND METHODS: Adult male C57BL/6J mice (n=80) and newborn mice (within 24 h after birth) (n=20) were used to generate a "controlled cortical impact" (CCI) model and harvest primary cortex neurons, respectively...
May 5, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28444861/lncrna-malat1-is-dysregulated-in-diabetic-nephropathy-and-involved-in-high-glucose-induced-podocyte-injury-via-its-interplay-with-%C3%AE-catenin
#3
Mengsi Hu, Rong Wang, Xiaobing Li, Minghua Fan, Jiangong Lin, Junhui Zhen, Liqun Chen, Zhimei Lv
Metastasis associated lung adenocarcinoma transcript 1(MALAT1) is a long non-coding RNA, broadly expressed in mammalian tissues including kidney and up-regulated in a variety of cancer cells. To date, its functions in podocytes are largely unknown. β-catenin is a key mediator in the canonical and non-canonical Wnt signalling pathway; its aberrant expression promotes podocyte malfunction and albuminuria, and contributes to kidney fibrosis. In this study, we found that MALAT1 levels were increased in kidney cortices from C57BL/6 mice with streptozocin (STZ)-induced diabetic nephropathy, and dynamically regulated in cultured mouse podocytes stimulated with high glucose, which showed a trend from rise to decline...
April 26, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28433650/long-noncoding-rna-malat1-is-a-potent-autophagy-inducer-protecting-brain-microvascular-endothelial-cells-against-oxygen-glucose-deprivation-reoxygenation-induced-injury-by-sponging-mir-26b-and-upregulating-ulk2-expression
#4
Zhijun Li, Jing Li, Na Tang
Brain microvascular endothelial cell (BMEC) injury induced by ischemia-reperfusion (I/R) is the initial stage of blood-brain barrier (BBB) disruption, which results in a poor prognosis in ischemic stroke patients. Autophagy has been shown to have protective effects on BMECs against cerebral ischemic insults. However, molecular mechanism of BMEC autophagy during I/R is unclear. Long noncoding RNAs (lncRNAs) are emerging as new factors involved in cell autophagy. LncRNA Malat1 is one of the most highly upregulated I/R or OGD/R-responsive endothelial lncRNA and plays a protective role in BMECs against cerebral ischemic insults...
April 20, 2017: Neuroscience
https://www.readbyqxmd.com/read/28431855/relationship-between-long-noncoding-rnas-and-physiological-risk-factors-of-cardiovascular-disease
#5
REVIEW
Moshen Mazidi, Peter Penson, Anna Gluba-Brzozka, Jacek Rysz, Maciej Banach
Long noncoding ribonucleic acids (lncRNAs) are an important category of noncoding RNAs that play crucial roles in controlling the expression of genes in health and in a range of illnesses including cardiovascular disease. A large body of genetic, experimental, and epidemiologic evidence suggests roles for an increasing number of lncRNAs in the regulation of metabolism, lipid profile, inflammation, and glucose metabolism in type II diabetes. Importantly, it has been suggested that lncRNAs can regulate chromatin alteration, messenger RNA stability, microRNA action, and can control transcription factors...
March 27, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28413461/long-noncoding-rna-malat1-inhibits-apoptosis-induced-by-oxygen-glucose-deprivation-and-reoxygenation-in-human-brain-microvascular-endothelial-cells
#6
Jia-Wei Xin, Yu-Gang Jiang
Cerebral ischemia/reperfusion (I/R) injury leads to brain vascular dysfunction, which is characterized by endothelial cell injury or death. Long noncoding (lnc) RNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is reportedly associated with endothelial cell functions and dysfunctions. In the present study, the role of MALAT1 in I/R-induced cerebral vascular endothelial cell apoptosis was explored using oxygen-glucose deprivation and reoxygenation (OGD-R) as an in vitro I/R injury model. Primary human brain microvascular endothelial cells were cultured under OGD-R, and the expression levels of MALAT1 and cell apoptosis were measured at 6, 9, 12, 24 and 36 h post-reoxygenation...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28281841/lncrna-nonratt021972-sirna-normalized-the-dysfunction-of-hepatic-glucokinase-through-akt-signaling-in-t2dm-rats
#7
Miaomiao Song, Lifang Zou, Lichao Peng, Shuangmei Liu, Bing Wu, Zhihua Yi, Yun Gao, Chunping Zhang, Hong Xu, Yurong Xu, Mengxia Tang, Shouyu Wang, Yun Xue, Tianyu Jia, Shanhong Zhao, Shangdong Liang, Guilin Li
Hepatic glucokinase (GK) expression and activity are decreased in type 2 diabetes mellitus (T2DM), and glycogen synthase kinase-3 (GSK-3) inhibits the synthesis of GK. In hepatocytes, the activation of the protein kinase B (PKB/AKT) signaling pathway enhances GK expression and inhibits the phosphorylation of GSK-3β. The dysfunction of certain long noncoding RNAs (lncRNAs) has been associated with a variety of diseases. AIMS: This study explored the effects of the lncRNA NONRATT021972 small interfering RNA (siRNA) on the dysfunction of hepatic GK through AKT signaling in T2DM rats...
March 10, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28260109/absence-of-malat1-does-not-prevent-den-induced-hepatocarcinoma-in-mice
#8
Stéphanie Miard, Marie-Josée Girard, Philippe Joubert, Sophie Carter, Amy Gonzales, Huiping Guo, Benjamin Morpurgo, Louise Boivin, Andrei Golovko, Frédéric Picard
Long non-coding RNAs (lncRNA) are key regulators of gene expression both at the transcriptional and post-transcriptional levels. The lncRNA metastasis associated lung adenocarcinoma transcript 1 (Malat1) is overexpressed in many types of cancer, including hepatocarcinoma, and induces cell proliferation in several cell lines in vitro. However, the direct causal effects of Malat1 on hepatocyte proliferation and liver carcinogenesis in vivo are not fully understood. To better determine the contribution of Malat1 to hepatocarcinoma oncogenesis, this study was aimed at testing the hypothesis that its absence confers resistance to the development of liver tumors...
April 2017: Oncology Reports
https://www.readbyqxmd.com/read/28215748/long-non-coding-rna-snhg14-promotes-microglia-activation-by-regulating-mir-145-5p-pla2g4a-in-cerebral-infarction
#9
Xu Qi, Ming Shao, Hongjing Sun, Yue Shen, Delong Meng, Wei Huo
Activated microglia cells (MCs) are able to release a large amount of inflammatory cytokines after ischemic stroke, which exacerbates neuron damage. In this study, we explored the functional involvement of long non-coding RNA (lncRNA) SNHG14 and its potential regulatory mechanism in the activation of MCs. The mouse model of middle cerebral artery occlusion (MCAO) and microglia cell model of oxygen/glucose deprivation (OGD) were made. The expression of SNHG14, miR-145-5p and PLA2G4A protein expression was determined by quantitative real time PCR and western blot, respectively...
February 16, 2017: Neuroscience
https://www.readbyqxmd.com/read/28206970/genetic-variation-in-long-noncoding-rnas-and-the-risk-of-nonalcoholic-fatty-liver-disease
#10
Silvia Sookoian, Cristian Rohr, Adrián Salatino, Hernán Dopazo, Tomas Fernandez Gianotti, Gustavo O Castaño, Carlos J Pirola
The human transcriptome comprises a myriad of non protein-coding RNA species, including long noncoding RNAs (lncRNAs), which have a remarkable role in transcriptional and epigenetic regulation. We hypothesized that variants in lncRNAs influence the susceptibility to nonalcoholic fatty liver disease (NAFLD). Using next generation sequencing, we performed a survey of genetic variation associated with randomly selected lncRNA-genomic regions located within both experimentally validated and computationally predicted regulatory elements...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28203482/long-non-coding-rna-h19-induces-cerebral-ischemia-reperfusion-injury-via-activation-of-autophagy
#11
Jue Wang, Bin Cao, Dong Han, Miao Sun, Juan Feng
Long non-coding RNA H19 (lncRNA H19) was found to be upregulated by hypoxia, its expression and function have never been tested in cerebral ischemia and reperfusion (I/R) injury. This study intended to investigate the role of lncRNA H19 and H19 gene variation in cerebral I/R injury with focusing on its relationship with autophagy activation. Cerebral I/R was induced in rats by middle cerebral artery occlusion followed by reperfusion. SH-SY5Y cells were subjected to oxygen and glucose deprivation and reperfusion (OGD/R) to simulate I/R injury...
February 2017: Aging and Disease
https://www.readbyqxmd.com/read/28202414/lncrna-tug1-sponges-microrna-9-to-promote-neurons-apoptosis-by-up-regulated-bcl2l11-under-ischemia
#12
Shengcai Chen, Mengdie Wang, Hang Yang, Ling Mao, Quanwei He, Huijuan Jin, Zi-Ming Ye, Xue-Ying Luo, Yuan-Peng Xia, Bo Hu
Emerging studies have illustrated that LncRNAs TUG1 play critical roles in multiple biologic processes. However, the LncRNA TUG1 expression and function in ischemic stroke have not been reported yet. In this study, we found that LncRNA TUG1 expression was significantly up-regulated in brain ischemic penumbra from rat middle carotid artery occlusion (MCAO) model, while similar results were also observed in cultured neurons under oxygen-glucose deprivation (OGD) insult. Knockdown of TUG1 decreased the ratio of apoptotic cells and promoted cells survival in vitro, which may be regulated by the elevated miRNA-9 expression and decreased Bcl2l11 protein...
March 25, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28137588/long-noncoding-rna-tug1-alleviates-extracellular-matrix-accumulation-via-mediating-microrna-377-targeting-of-ppar%C3%AE-in-diabetic-nephropathy
#13
Li-Jun Duan, Min Ding, Li-Jun Hou, Yuan-Tao Cui, Chun-Jun Li, De-Min Yu
Long noncoding RNA taurine-upregulated gene 1 (lncRNA TUG1) has been reported to play a key role in the progression of diabetic nephropathy (DN). However, the role of lncRNA TUG1 in the regulation of diabetic nephropathy remains largely unknown. The aim of the present study is to identify the regulation of lncRNA TUG1 on extracellular matrix accumulation via mediating microRNA-377 targeting of PPARγ, and investigate the underlying mechanisms in progression of DN. Microarray was performed to screen differentially expressed miRNAs in db/db DN mice...
March 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28122089/anril-a-regulator-of-vegf-in-diabetic-retinopathy
#14
Anu Alice Thomas, Biao Feng, Subrata Chakrabarti
Purpose: Long noncoding RNAs (lncRNAs) previously thought to be "dark matter" of the genome, play key roles in various biological processes. The lncRNA ANRIL is located at a genetic susceptibility locus for coronary artery diseases and type 2 diabetes. We examined the role of ANRIL in diabetic retinopathy, through study of its regulation of VEGF both in vitro and in vivo. Methods: Human retinal endothelial cells (HRECs) were subjected to incubation in high glucose to mimic diabetes...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28093478/long-noncoding-rna-malat1-regulates-cerebrovascular-pathologies-in-ischemic-stroke
#15
Xuejing Zhang, Xuelian Tang, Kai Liu, Milton H Hamblin, Ke-Jie Yin
The study was designed to determine the role of long noncoding RNA (lncRNA), metastasis-associated lung adenocarcinoma transcript 1 (Malat1), in ischemic stroke outcome. Primary mouse brain microvascular endothelial cells (BMECs) were cultured and treated with Malat1 GapmeR before 16 h oxygen and glucose depravation (OGD). Cell death was assayed by LDH and MTT methods. Malat1 knock-out and wild-type mice were subjected to 1 h of middle cerebral artery occlusion (MCAO) and 24-72 h of reperfusion. To explore the underlying mechanism, apoptotic and inflammatory factors were measured by qPCR, ELISA, and Western blotting...
February 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28041957/human-pancreatic-%C3%AE-cell-lncrnas-control-cell-specific-regulatory-networks
#16
Ildem Akerman, Zhidong Tu, Anthony Beucher, Delphine M Y Rolando, Claire Sauty-Colace, Marion Benazra, Nikolina Nakic, Jialiang Yang, Huan Wang, Lorenzo Pasquali, Ignasi Moran, Javier Garcia-Hurtado, Natalia Castro, Roser Gonzalez-Franco, Andrew F Stewart, Caroline Bonner, Lorenzo Piemonti, Thierry Berney, Leif Groop, Julie Kerr-Conte, Francois Pattou, Carmen Argmann, Eric Schadt, Philippe Ravassard, Jorge Ferrer
Recent studies have uncovered thousands of long non-coding RNAs (lncRNAs) in human pancreatic β cells. β cell lncRNAs are often cell type specific and exhibit dynamic regulation during differentiation or upon changing glucose concentrations. Although these features hint at a role of lncRNAs in β cell gene regulation and diabetes, the function of β cell lncRNAs remains largely unknown. In this study, we investigated the function of β cell-specific lncRNAs and transcription factors using transcript knockdowns and co-expression network analysis...
February 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28028307/identification-of-a-rna-seq-based-8-long-non-coding-rna-signature-predicting-survival-in-esophageal-cancer
#17
Qiaowei Fan, Bingrong Liu
BACKGROUND Accumulating evidence suggests the involvement of long non-coding RNAs (lncRNAs) as oncogenic or tumor suppressive regulators in the development of various cancers. In the present study, we aimed to identify a lncRNA signature based on RNA sequencing (RNA-seq) data to predict survival in esophageal cancer. MATERIAL AND METHODS The RNA-seq lncRNA expression data and clinical information were downloaded from The Cancer Genome Atlas (TCGA) database. Differentially expressed lncRNAs were screened out between esophageal cancer and normal tissues...
December 28, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27903964/lncrna-h19-inhibits-autophagy-by-epigenetically-silencing-of-diras3-in-diabetic-cardiomyopathy
#18
Chuanjun Zhuo, Ronghuan Jiang, Xiaodong Lin, Mingjing Shao
We previously generated a rat model of diabetic cardiomyopathy and found that the expression of long non-coding RNA H19 was downregulated. The present study was aimed to explore the pathogenic role of H19 in the development of diabetic cardiomyopathy. Overexpression of H19 in diabetic rats attenuated cardiomyocyte autophagy and improved left ventricular function. High glucose was found to reduce H19 expression and increase autophagy in cultured neonatal cardiomyocytes. The results of RNA-binding protein immunoprecipitation showed that H19 could directly bind with EZH2 in cardiomyocytes...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/27876564/rncr3-a-regulator-of-diabetes-mellitus-related-retinal-microvascular-dysfunction
#19
Kun Shan, Chao-Peng Li, Chang Liu, Xin Liu, Biao Yan
Retinal microvascular abnormality is an important pathological feature of diabetic retinopathy. Herein, we report the role of lncRNA-RNCR3 in diabetes mellitus-induced retinal microvascular abnormalities. We show that RNCR3 is significantly up-regulated upon high glucose stress in vivo and in vitro. RNCR3 knockdown alleviates retinal vascular dysfunction in vivo, as shown by decreased acellular capillaries, decreased vascular leakage, and reduced inflammatory response. RNCR3 knockdown decreases retinal endothelial cell proliferation, and reduces cell migration and tube formation in vitro...
January 22, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27864543/long-non-coding-rnas-a-novel-paradigm-for-toxicology
#20
Joseph L Dempsey, Julia Yue Cui
Long non-coding RNAs (lncRNAs) are over 200 nucleotides in length and are transcribed from the mammalian genome in a tissue-specific and developmentally regulated pattern. There is growing recognition that lncRNAs are novel biomarkers and/or key regulators of toxicological responses in humans and animal models. Lacking protein-coding capacity, the numerous types of lncRNAs possess a myriad of transcriptional regulatory functions that include cis and trans gene expression, transcription factor activity, chromatin remodeling, imprinting, and enhancer up-regulation...
January 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
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