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MicroRNA & diabetes

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https://www.readbyqxmd.com/read/28332581/elevated-mir-130a-mir130b-mir-152-expression-reduces-intracellular-atp-levels-in-the-pancreatic-beta-cell
#1
Jones K Ofori, Vishal A Salunkhe, Annika Bagge, Neelanjan Vishnu, Mototsugu Nagao, Hindrik Mulder, Claes B Wollheim, Lena Eliasson, Jonathan L S Esguerra
MicroRNAs have emerged as important players of gene regulation with significant impact in diverse disease processes. In type-2 diabetes, in which impaired insulin secretion is a major factor in disease progression, dysregulated microRNA expression in the insulin-secreting pancreatic beta cell has been widely-implicated. Here, we show that miR-130a-3p, miR-130b-3p, and miR-152-3p levels are elevated in the pancreatic islets of hyperglycaemic donors, corroborating previous findings about their upregulation in the islets of type-2 diabetes model Goto-Kakizaki rats...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28323921/emerging-roles-for-micrornas-in-diabetic-microvascular-disease-novel-targets-for-therapy
#2
Yu Zhang, Xinghui Sun, Basak Icli, Mark W Feinberg
Chronic, low-grade systemic inflammation and impaired microvascular function are critical hallmarks in the development of insulin resistance. Accordingly, insulin resistance is a major risk factor for type 2 diabetes and cardiovascular disease. Accumulating studies demonstrate that restoration of impaired function of the diabetic macro- and microvasculature may ameliorate a range of cardiovascular disease states and diabetes-associated complications. In this review, we focus on the emerging role of microRNAs, non-coding RNAs that fine-tune target gene expression and signaling pathways, in insulin-responsive tissues and cell types important for maintaining optimal vascular homeostasis and preventing the sequelae of diabetes-induced end organ injury...
February 17, 2017: Endocrine Reviews
https://www.readbyqxmd.com/read/28317889/mirnas-novel-regulators-of-autoimmunity-mediated-pancreatic-%C3%AE-cell-destruction-in-type-1-diabetes
#3
REVIEW
Ying Zheng, Zhen Wang, Zhiguang Zhou
MicroRNAs (miRNAs) are a series of conserved, short, non-coding RNAs that modulate gene expression in a posttranscriptional manner. miRNAs are involved in almost every physiological and pathological process. Type 1 diabetes (T1D) is an autoimmune disease that is the result of selective destruction of pancreatic β-cells driven by the immune system. miRNAs are also important participants in T1D pathogenesis. Herein, we review the most recent data on the potential involvement of miRNAs in T1D. Specifically, we focus on two aspects: the roles of miRNAs in maintaining immune homeostasis and regulating β-cell survival and/or functions in T1D...
March 20, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28315335/microrna-99a-inhibits-insulin-induced-proliferation-migration-dedifferentiation-and-rapamycin-resistance-of-vascular-smooth-muscle-cells-by-inhibiting-insulin-like-growth-factor-1-receptor-and-mammalian-target-of-rapamycin
#4
Zi-Wei Zhang, Rui-Wei Guo, Jin-Lin Lv, Xian-Mei Wang, Jin-Shan Ye, Ni-Hong Lu, Xing Liang, Li-Xia Yang
Patients with type 2 diabetes mellitus (T2DM) are characterized by insulin resistance and are subsequently at high risk for atherosclerosis. Hyperinsulinemia has been associated with proliferation, migration, and dedifferentiation of vascular smooth muscle cells (VSMCs) during the pathogenesis of atherosclerosis. Moreover, insulin-like growth factor-1 receptor (IGF-1R) and mammalian target of rapamycin (mTOR) have been demonstrated to be the underlying signaling pathways. Recently, microRNA-99a (miR-99a) has been suggested to regulate the phenotypic changes of VSMCs in cancer cells...
March 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28315330/microrna-29-regulates-myocardial-microvascular-endothelial-cells-proliferation-and-migration-in-association-with-igf1-in-type-2-diabetes
#5
Zhenjie Li, Qingcai Yue, Haiying Peng
BACKGROUND: In our study, we investigated the expression and function of microRNA-29 in myocardial microvascular endothelial cells (MMEVC) in type 2 diabetic Goto-Kakizaki (GK) rats. METHODS: MiR-29 gene expression was compared, by qRT-PCR between diabetic GK rat MMEVC and non-diabetic Wistar rat MMEVC. MiR-29 was downregulated in GK MMEVC and its effect on angiogenic properties of proliferation and migration was examined. Potential downstream target gene of miR-29, insulin growth factor 1 (IGF1), was assessed by dual-luciferase reporter assay, qRT-PCR and western blot in GK MMEVC...
March 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28299324/micrornas-and-cardiovascular-disease-in-diabetes-mellitus
#6
REVIEW
Yue Ding, Xue Sun, Peng-Fei Shan
Cardiovascular disease (CVD) is the major macrovascular complication of diabetes mellitus. Recently, although CVD morbidity and mortality have decreased as a result of comprehensive control of CVD risk factors, CVD remains the leading cause of death of patients with diabetes in many countries, indicating the potential underlying pathophysiological mechanisms. MicroRNAs are a class of noncoding, single-stranded RNA molecules that are involved in β-cell function, insulin secretion, insulin resistance, skeletal muscle, and adipose tissue and which play an important role in glucose homeostasis and the pathogenesis of diabetic complications...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28297724/intraocular-delivery-of-mir-146-inhibits-diabetes-induced-retinal-functional-defects-in-diabetic-rat-model
#7
Pei Zhuang, Chithra K Muraleedharan, Shunbin Xu
Purpose: Previously, we showed that microRNA-146 (miR-146) is a pivotal negative feedback regulator of multiple nuclear factor kappa-B (NF-κB) activation pathways in retinal endothelial cells (RECs). We hypothesized that miR-146 plays an important role in diabetic retinopathy (DR) by inhibiting diabetes-induced inflammatory response in the retina. The purpose of the current study is to test this hypothesis in vivo. Methods: Lentiviruses expressing rno-miR-146a, lenti-miR-146a, and negative control oligonucleotide with scrambled sequence, lenti-miR-neg ctl, were produced...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28297576/chitosan-wound-dressings-incorporating-exosomes-derived-from-microrna-126-overexpressing-synovium-mesenchymal-stem-cells-provide-sustained-release-of-exosomes-and-heal-full-thickness-skin-defects-in-a-diabetic-rat-model
#8
Shi-Cong Tao, Shang-Chun Guo, Min Li, Qin-Fei Ke, Ya-Ping Guo, Chang-Qing Zhang
There is a need to find better strategies to promote wound healing, especially of chronic wounds, which remain a challenge. We found that synovium mesenchymal stem cells (SMSCs) have the ability to strongly promote cell proliferation of fibroblasts; however, they are ineffective at promoting angiogenesis. Using gene overexpression technology, we overexpressed microRNA-126-3p (miR-126-3p) and transferred the angiogenic ability of endothelial progenitor cells to SMSCs, promoting angiogenesis. We tested a therapeutic strategy involving controlled-release exosomes derived from miR-126-3p-overexpressing SMSCs combined with chitosan...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28289072/downregulation-of-mir-15a-b-accelerates-fibrotic-remodelling-in-the-type-2-diabetic-human-and-mouse-heart
#9
Shruti Rawal, Pujika Emani Munasinghe, Prashanth Thevakar, Jason Kar Sheng Lew, Gregory T Jones, Michael Ja Willams, Philip Davis, Richard W Bunton, Ivor F Galvin, Patrick Manning, Regis R Lamberts, Rajesh G Katare
AIM: Myocardial fibrosis is a well established cause of increased myocardial stiffness and subsequent diastolic dysfunction in the diabetic heart. The molecular regulators that drive the process of fibrotic events in the diabetic heart are still unknown. We determined the role of the microRNA (miR)-15 family in fibrotic remodelling of the diabetic heart. METHODS AND RESULTS: Right atrial appendage (RAA) and left ventricular (LV) biopsy tissues collected from diabetic and non-diabetic patients undergoing coronary artery bypass graft surgery showed significant downregulation of miR-15a and -15b...
March 13, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28288167/erythropoietin-epo-ameliorates-obesity-and-glucose-homeostasis-by-promoting-thermogenesis-and-endocrine-function-of-classical-brown-adipose-tissue-bat-in-diet-induced-obese-mice
#10
Kazuki Kodo, Satoru Sugimoto, Hisakazu Nakajima, Jun Mori, Ikuyo Itoh, Shota Fukuhara, Keiichi Shigehara, Taichiro Nishikawa, Kitaro Kosaka, Hajime Hosoi
Erythropoietin (EPO), clinically used as a hematopoietic drug, has received much attention due to its nonhematopoietic effects. EPO reportedly has beneficial effects on obesity and diabetes mellitus. We investigated whether interscapular brown adipose tissue (iBAT: main part of classical BAT) could play a role in EPO's anti-obesity and anti-diabetic effects in diet-induced obese mice. Four-week-old male C57BL/6J mice were fed a high-fat diet (HFD-Con), and half were additionally given an intraperitoneal injection of recombinant human EPO (200 IU/kg) (HFD-EPO) thrice a week for four weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28280903/microrna-21-targets-bcl2-mrna-to-increase-apoptosis-in-rat-and-human-beta-cells
#11
Emily K Sims, Alexander J Lakhter, Emily Anderson-Baucum, Tatsuyoshi Kono, Xin Tong, Carmella Evans-Molina
AIMS/HYPOTHESIS: The role of beta cell microRNA (miR)-21 in the pathophysiology of type 1 diabetes has been controversial. Here, we sought to define the context of beta cell miR-21 upregulation in type 1 diabetes and the phenotype of beta cell miR-21 overexpression through target identification. METHODS: Islets were isolated from NOD mice and mice treated with multiple low doses of streptozotocin, as a mouse model of diabetes. INS-1 832/13 beta cells and human islets were treated with IL-1β, IFN-γ and TNF-α to mimic the milieu of early type 1 diabetes...
March 9, 2017: Diabetologia
https://www.readbyqxmd.com/read/28277542/microrna-27a-promotes-podocyte-injury-via-ppar%C3%AE-mediated-%C3%AE-catenin-activation-in-diabetic-nephropathy
#12
Zhanmei Zhou, Jiao Wan, Xiaoyan Hou, Jian Geng, Xiao Li, Xiaoyan Bai
Podocyte injury has a pivotal role in the pathogenesis of diabetic nephropathy (DN). MicroRNA-27a (miR-27a), peroxisome proliferator-activated receptor γ (PPARγ) and β-catenin pathways have been involved in the pathogenesis of DN. Herein, we asked whether miR-27a mediates podocyte injury through PPARγ/β-catenin signaling in DN. The functional relevance of miR-27a, PPARγ and β-catenin were investigated in cultured podocytes and glomeruli of diabetic rats and patients using in vitro and in vivo approaches...
March 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28275977/arsenic-exposure-and-type-2-diabetes-micrornas-as-mechanistic-links
#13
REVIEW
Rowan Beck, Miroslav Styblo, Praveen Sethupathy
PURPOSE OF REVIEW: The goal of this review is to delineate the following: (1) the primary means of inorganic arsenic (iAs) exposure for human populations, (2) the adverse public health outcomes associated with chronic iAs exposure, (3) the pathophysiological connection between arsenic and type 2 diabetes (T2D), and (4) the incipient evidence for microRNAs as candidate mechanistic links between iAs exposure and T2D. RECENT FINDINGS: Exposure to iAs in animal models has been associated with the dysfunction of several different cell types and tissues, including liver and pancreatic islets...
March 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28273212/role-of-micrornas-in-the-treatment-of-type-2-diabetes-mellitus-with-roux-en-y-gastric-bypass
#14
Z Zhu, J Yin, D C Li, Z Q Mao
The aim of this study was to investigate the effect of Roux-en-Y gastric bypass (RYGB) on the peripheral blood microRNAs (miRNAs) of patients with type 2 diabetes mellitus (T2DM). miRNAs are small 20- to 22-nucleotide (nt) noncoding RNAs. They constitute a novel class of gene regulators that negatively regulate gene expression at the post-transcriptional level. miRNAs play an important role in several biological processes. Twelve patients with T2DM who were scheduled to undergo laparoscopic RYGB surgery were separated into two groups, using a body mass index of 30 kg/m2 as a cut-off point...
March 2, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28270521/pathogenic-role-of-microrna-21-in-diabetic-retinopathy-through-down-regulation-of-ppar%C3%AE
#15
Qian Chen, Fangfang Qiu, Kelu Zhou, H Greg Matlock, Yusuke Takahashi, Raju V S Rajala, Yanhui Yang, Elizabeth Moran, Jian-Xing Ma
Fenofibrate, a specific agonist of peroxisome proliferator-activated receptor alpha (PPARα), displays robust therapeutic effects on diabetic retinopathy (DR) in type 2 diabetic patients. Our recent studies have shown that PPARα is down-regulated in the diabetic retina, which contributes to the pathogenesis of DR. However, the mechanism for diabetes-induced down-regulation of PPARα remains unknown. We investigated the role of microRNA-21 (miR-21) in regulating PPARα in DR. MiR-21 was over-expressed, while PPARα levels were decreased in the retina of db/db mice, a type 2 diabetic model...
March 7, 2017: Diabetes
https://www.readbyqxmd.com/read/28270439/comprehensive-functional-screening-of-mirnas-involved-in-fat-cell-insulin-sensitivity-among-women
#16
Ingrid Dahlman, Yasmina Belarbi, Jurga Laurencikiene, Annie M Pettersson, Peter Arner, Agné Kulyté
The key pathological link between obesity and type 2 diabetes is insulin resistance but the molecular mechanisms are not entirely identified. MicroRNAs (miRNA) are dysregulated in obesity and may contribute to insulin resistance. Our objective was to detect and functionally investigate miRNAs linked to insulin sensitivity in human subcutaneous white adipose tissue (scWAT). Subjects were selected based on the insulin-stimulated lipogenesis response of subcutaneous adipocytes. Global miRNA profiling was performed in abdominal scWAT of 18 obese insulin resistance (OIR), 21 obese insulin sensitive (OIS) and nine lean women...
March 7, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28264477/a-systematic-study-of-dysregulated-microrna-in-type-2-diabetes-mellitus
#17
Yuqing He, Yuanlin Ding, Biyu Liang, Juanjuan Lin, Taek-Kyun Kim, Haibing Yu, Hanwei Hang, Kai Wang
MicroRNAs (miRNAs) are small noncoding RNAs that modulate the cellular transcriptome at the post-transcriptional level. miRNA plays important roles in different disease manifestation, including type 2 diabetes mellitus (T2DM). Many studies have characterized the changes of miRNAs in T2DM, a complex systematic disease; however, few studies have integrated these findings and explored the functional effects of the dysregulated miRNAs identified. To investigate the involvement of miRNAs in T2DM, we obtained and analyzed all relevant studies published prior to 18 October 2016 from various literature databases...
February 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28264458/maternal-low-protein-diet-modulates-glucose-metabolism-and-hepatic-micrornas-expression-in-the-early-life-of-offspring-%C3%A2
#18
Jia Zheng, Xinhua Xiao, Qian Zhang, Tong Wang, Miao Yu, Jianping Xu
Emerging studies revealed that maternal protein restriction was associated with increased risk of type 2 diabetes mellitus in adulthood. However, the mechanisms of its effects on offspring, especially during early life of offspring, are poorly understood. Here, it is hypothesized that impaired metabolic health in offspring from maternal low-protein diet (LPD) is associated with perturbed miRNAs expression in offspring as early as the weaning age. We examined the metabolic effects on the C57BL/6J mice male offspring at weaning from dams fed with LPD or normal chow diet (NCD) throughout pregnancy and lactation...
February 27, 2017: Nutrients
https://www.readbyqxmd.com/read/28263817/mir-34a-contributes-to-diabetes-related-cochlear-hair-cell-apoptosis-via-sirt1-hif-1%C3%AE-signaling
#19
Ying Lin, Jinjin Shen, Danfeng Li, Jie Ming, Xiangyang Liu, Nana Zhang, Jingbo Lai, Min Shi, Qiuhe Ji, Ying Xing
Type 2 diabetes (T2DM) has been considered to be associated with a higher likelihood of hearing impairment (HI). However, the molecular mechanisms underlying the association between diabetes and HI are poorly understood. MicroRNAs have recently been demonstrated to be closely associated with hearing loss and considered as promising therapeutic targets. Herein, we investigated whether miR-34a contributes to diabetes-related cochlear hair cell apoptosis and sought to identify the underlying mechanism. The results showed that miR-34a was up-regulated in the cochleas of db/db mice, accompanied by significant hearing threshold elevation and hair cell loss...
March 2, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28263783/establishment-of-a-novel-mouse-model-for-pioglitazone-induced-skeletal-muscle-injury
#20
Sho Akai, Shingo Oda, Tsuyoshi Yokoi
Skeletal muscle (SKM) injury is one of the major safety concerns in risk assessment for drug development. However, no appropriate pre-clinical animal model exists to evaluate drug-induced SKM injury except that caused by fibrates and statins. Thiazolidinedione, a PPARγ agonistic drug for type 2 diabetes mellitus, is widely used clinically but can induce adverse effects such as hepatotoxicity and SKM injury, as has been reported in recent decades. Moreover, thiazolidinedione-induced SKM injury has only been reported in humans, and no evidence of SKM injury has been observed in rodents...
March 2, 2017: Toxicology
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