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Jun Qiang, Yi-Fan Tao, Jie He, Hong-Xia Li, Pao Xu, Jin-Wen Bao, Yi-Lan Sun
MicroRNAs (miRNAs) are small, non-coding RNAs that regulate target gene expression by binding to the 3'-untranslated regions (3'-UTRs) of their target mRNAs. The miR-92 family is an important miRNA family, which was discovered to be related to regulation of tumor proliferation, apoptosis, invasion, and metastasis. Inhibition of miR-92d-3p was found previously in head kidney of genetically improved farmed tilapia (GIFT, Oreochromis niloticus) exposed to Streptococcus iniae infection. In this study, we found that miR-92d-3p regulated complement C3 mRNA levels by binding to its 3'-UTR by 3'-UTR luciferase reporter assay, and reduced miR-92d-3p expression resulted in increased C3 mRNA levels...
February 22, 2017: Fish & Shellfish Immunology
Jun Qiang, Fanyi Tao, Jie He, Lanyi Sun, Pao Xu, Wenjin Bao
BACKGROUND: Genetically improved farmed tilapia (GIFT, Oreochromis niloticus) are susceptible to infection by Streptococcus iniae when maintained in modern intensive culture systems. GIFT are commercially important fishes that are cultured widely in southern China. The role of microRNAs (miRNAs) in the regulatory response of GIFT to S. iniae infection has been underestimated and has not yet been well studied. Head kidney has an important immune function in teleost fishes. The main aim of this study was to determine the possible function of miRNAs in head kidney of S...
February 20, 2017: BMC Genomics
Ying Zhang, Tao Li, Yumin Qiu, Tao Zhang, Pengbo Guo, Xiaomin Ma, Qing Wei, Lihui Han
Unique change of circulating microRNAs (miRNAs) was recognized to occur in early oncogenesis, which conferred it the potential as biomarkers for early detection of cancer. However, its diagnostic capability for hepatocellular carcinoma (HCC) has not been fully understood. In this study, microarray analysis was applied to screen the initial candidate miRNA from both the supernatants of anoikis-resistant cellular models and the sera samples of HCC patients. The selected differentially expressed miRNAs were further verified in 115 HCC patients and 40 health controls by qRT-PCR...
January 2017: Medicine (Baltimore)
Yunsheng Guo, Yan Pang, Xia Gao, Min Zhao, Xin Zhang, Hao Zhang, Bing Xuan, Yimin Wang
The mechanisms underlying oxaliplatin (OXA) resistance in colon cancer cells are not fully understood. MicroRNAs (miRNAs) play important roles in tumorigenesis and drug resistance. However, the relationship between miRNA and OXA resistance in colon cancer cells has not been previously explored. In this study, we utilized microRNA microarray analysis and real-time PCR to verify that miR-93, miR-191, miR-137, miR-181 and miR-491-3p were significantly down-regulated and that miR-96, miR-21, miR-22, miR-15b and miR-92 were up-regulated in both HCT-15/OXA and SW480/OXA cell lines...
2017: Cancer Biomarkers: Section A of Disease Markers
Haifeng Wang, Changxing Ke, Xingyong Ma, Qinghua Zhao, Mingying Yang, Wei Zhang, Jiansong Wang
miR-92 has been reported to be upregulated in several human cancers. Until now, its expression pattern and biological roles in human bladder cancer still remains unexplored. The present study aims to clarify its expression, function, and potential molecular mechanisms in bladder cancer. Using real-time PCR, we found that miR-92 was upregulated in bladder cancer tissues compared with normal bladder tissues. We transfected miR-92 mimic and inhibitor in T24 and 5637 bladder cancer cells separately. We found that miR-92 mimic promoted T24 proliferation and invasion, with increased expression of cyclin D1, c-myc, and MMP7 at both mRNA and protein levels...
November 9, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Hua-Yu Zhu, Wen-Dong Bai, Jun Li, Ke Tao, Hong-Tao Wang, Xue-Kang Yang, Jia-Qi Liu, Yun-Chuan Wang, Ting He, Song-Tao Xie, Da-Hai Hu
Keloid, a skin benign tumor, is characterized by overgrowth of fibroblasts and the excessive deposition of extracellular matrix in wounded skin. Peroxisome proliferator-activated receptor-γ (PPAR-γ) agonist was recently evaluated to inhibit fibrosis. This study explored the underlying mechanisms. Fibroblasts isolated from 25 keloid patients (KFs) and fibroblasts isolated from healthy controls (NSFBs) were also subjected to treatment with PPAR-γ agonist troglitazone and antagonist GW9662 or for transfection with miR-92 mimics or inhibitor, Axl siRNA, and miR-92b or Axl promoter constructs, as well as being subjected to qRT-PCR, ELISA, Western blot, protein array, luciferase, and ChIP assays...
2016: American Journal of Translational Research
Hongxia Liu, Guofen Li, Wenxue Zhao, Yibo Hu
BACKGROUND This study was designed to investigate the effects of microRNA-92 (miR-92), Kruppel-like factor 2 (KLF2), and Kruppel-like factor 4 (KLF4) on endothelial injury after acute myocardial infarction (AMI). MATERIAL AND METHODS Blood samples were collected from 50 AMI patients for detection of cardiac troponin I (cTnI), heart-type fatty acid-binding protein (H-FABP), and von Willebrand factor (vWF). The Sprague-Dawley rat models of AMI (n=30) were established by ligating their left anterior descending coronary artery...
July 14, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Hsiuying Wang
MicroRNAs (miRNAs) are shown to be involved in the initiation and progression of cancers in the literature, and the expression of miRNAs is used as an important cancer prognostic tool. The aim of this study is to predict high-confidence miRNA biomarkers for cancer. We adopt a method that combines miRNA phylogenetic structure and miRNA microarray data analysis to discover high-confidence miRNA biomarkers for colon, prostate, pancreatic, lung, breast, bladder and kidney cancers. There are 53 miRNAs selected through this method that either have potential to involve a single cancer's development or to involve several cancers' development...
May 19, 2016: International Journal of Molecular Sciences
Shuai Chen, Krista M Nichols, Helen C Poynton, Maria S Sepúlveda
Daphnia can develop tolerance to cadmium (Cd) after multi-generational exposures. Until now, Cd tolerance in this crustacean was thought to be mainly due to its sequestration via induction of metallothioneins (MTs). Our research supports other studies showing microRNAs (miRNAs) also play a role in this enhanced tolerance. We induced Cd tolerance in Daphnia pulex after exposing them for 25 generations and examined the maintenance of enhanced Cd tolerance under a Cd-free environment for an additional three generations...
June 2016: Aquatic Toxicology
Murat Kara, Gamze Kirkil, Serdar Kalemci
BACKGROUND: This study aimed to investigate the associations of miRNA with COPD patients. OBJECTIVES: Chronic obstructive pulmonary disease (COPD) is characterized by progressive and largely irreversible airflow limitation. COPD is one of the most common causes of death globally and it is still a serious public health problem worldwide. Pathogenesis of COPD is multifactorial including genetics and environmental factors. MATERIAL AND METHODS: Sixty patients who were diagnosed with COPD according to GOLD guidance and 40 controls were involved in the study...
January 2016: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Yazeed A Al-Sheikh, Hazem K Ghneim, Khalil I Softa, Abdulrahman A Al-Jobran, Omar Al-Obeed, Mansoor A V Mohamed, Maha Abdulla, Mourad A M Aboul-Soud
MicroRNAs (miRNAs or miRs) have been advocated as potentially robust and highly stable biomarkers of diverse disease conditions including cancer. The primary aim of this study was two-fold: i) to profile the expression levels of selected mature miRNA signature genes, such as miR-145, miR-195, miR-29 and miR-92, in a paired-study design of 20 colorectal cancer (CRC) tissues from patients versus adjacent neoplasm-free mucosal tissues employing reverse transcription-quantitative polymerase chain reaction; and ii) to examine their expression level in the plasma of the same CRC patients in relation to the age-matched plasma of healthy controls...
February 2016: Oncology Letters
Ke He, Gang Niu, Jun Gao, Jun-Xiu Liu, Hu Qu
OBJECTIVE: This study examined microRNA-92 (miR-92) expression level in relation to the mRNA level of its potential target gene, estrogen receptor β1 (ERβ1), in female patients diagnosed with pelvic organ prolapse (POP). STUDY DESIGN: Between July 2012 and September 2014, a total of 104 patients were recruited at the First Affiliated Hospital of Sun Yat-sen University, which included 56 POP patients and 48 non-POP control subjects. Based on POP-Q score, the POP patients were further categorized into POP II and POP III groups...
March 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Chuanli Ren, Wenshu Wang, Chongxu Han, Hui Chen, Deyuan Fu, Yulin Luo, Hanyu Yao, Daxin Wang, Li Ma, Lin Zhou, Dongsheng Han, Ming Shen
MicroRNA (miR)-92 expression is often aberrant in human cancers. However, its expression in gastric carcinoma and its relation to clinicopathological features and prognosis are unclear.Tissue microarrays were constructed from 180 patients with gastric cancer (GC), who were undergoing radical resection. MiR-92a expression was detected using miRNA-locked nucleic acid in situ hybridization, and its correlation with clinicopathological features and overall survival was analyzed. MiR-92a expression was decreased in 13...
July 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Nikolay V Conev, Ivan S Donev, Assia A Konsoulova-Kirova, Trifon G Chervenkov, Javor K Kashlov, Krasimir D Ivanov
The present study examined whether miR-17, miR-21, miR-29a, and miR-92 that are dysregulated in colon cancer (CC) can serve as potential predictive markers for relapse of disease after radical surgery and adjuvant chemotherapy. Real-time reverse transcription quantitative polymerase chain reaction was used to measure the expression levels of the miRNAs in serum samples from 37 patients with CC and 7 healthy individuals, tested as a control group. The area under the receiver operating characteristic curve (AUC) was then used to evaluate the predictive performance of the four miRNAs alone or in combination and compare it with carcinoembryonic antigen...
December 2015: Bioscience Trends
Yanqiong Zhang, Yunsheng Wang, Fuliang Xie, Chao Li, Baohong Zhang, Robert L Nichols, Xiaoping Pan
The root-knot nematode Meloidogyne incognita is among the most damaging plant-parasitic pests of several crops including cotton (Gossypium hirsutum) and tomato (Lycopersicon escultentum). Recently, a genome has become available for M. incognita, which greatly facilitates investigation of the interactions between M. incognita and its plant hosts at the molecular level and enables formation of hypotheses concerning development at the cellular level. MicroRNAs (miRNAs) are a class of small RNA molecules that serve as endogenous gene regulators...
March 2016: Functional & Integrative Genomics
Lihong Fan, Huiwei Qi, Junliang Teng, Bo Su, Hao Chen, Changhui Wang, Qing Xia
Circulating microRNAs (miRNAs) are potential noninvasive biomarkers for cancer detection. We used preoperative serum samples from non-small cell lung cancer (NSCLC) patients and healthy controls to investigate whether serum levels of candidate miRNAs could be used as diagnostic biomarkers in patients with resectable NSCLC and whether they were associated with clinicopathologic characteristics. We initially detected expression of 12 miRNAs using quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) in preoperative serum samples of 94 NSCLC patients and 58 healthy controls...
June 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Jian Zhao, Wenfan Fu, Hongying Liao, Lu Dai, Zeyong Jiang, Youguang Pan, Haoda Huang, Yijun Mo, Siwen Li, Guangping Yang, Jun Yin
BACKGROUND: Chemotherapy is an important therapeutic approach for non-small cell lung cancer (NSCLC). However, a successful long-term treatment can be prevented by the occurring of chemotherapy resistance frequently, and the molecular mechanisms of chemotherapy resistance in NSCLC remain unclear. In this study, abnormal expressions of miR-17 and miR-92 families are observed in cisplatin-resistant cells, suggesting that miR-17 and miR-92 families are involved in the regulation of cisplatin resistance in NSCLC...
2015: BMC Cancer
Kirsten Nguyen Knudsen, Boye Schnack Nielsen, Jan Lindebjerg, Torben Frøstrup Hansen, René Holst, Flemming Brandt Sørensen
Deregulated microRNAs play a role in the development and progression of colon cancer, but little is known about their tissue and cell distribution in the continuum of normal mucosa through the premalignant adenoma to invasive adenocarcinoma. The aim of this study was to examine the expression pattern of the miR-17-92 cluster (miR-17, miR-18, miR-19, miR-20 and miR-92) as well as miR-21, miR-31, miR-135b, and miR-145 in early clinically diagnosed colon cancer. MicroRNAs were analysed by chromogenic in situ hybridisation in the normal-adenoma-adenocarcinoma sequence of nine adenocarcinomas developed in mucosal colon polyps...
2015: PloS One
Laura Smith, Euan W Baxter, Philip A Chambers, Caroline A Green, Andrew M Hanby, Thomas A Hughes, Claire E Nash, Rebecca A Millican-Slater, Lucy F Stead, Eldo T Verghese, Valerie Speirs
BACKGROUND: MicroRNA (miR) expression is commonly dysregulated in many cancers, including breast. MiR-92 is one of six miRs encoded by the miR-17-92 cluster, one of the best-characterised oncogenic miR clusters. We examined expression of miR-92 in the breast epithelium and stroma during breast cancer progression. We also investigated the role of miR-92 in fibroblasts in vitro and showed that down-regulation in normal fibroblasts enhances the invasion of breast cancer epithelial cells...
2015: PloS One
Alison J Kriegel, Maria Angeles Baker, Yong Liu, Pengyuan Liu, Allen W Cowley, Mingyu Liang
The goal of this study was to systematically identify endogenous microRNAs (miRNAs) in endothelial cells that regulate mRNAs encoded by genes relevant to hypertension. Small RNA deep sequencing was performed in cultured human microvascular endothelial cells. Of the 50 most abundant miRNAs identified, 30 had predicted target mRNAs encoded by genes with known involvement in hypertension or blood pressure regulation. The cells were transfected with anti-miR oligonucleotides to inhibit each of the 30 miRNAs and the mRNA abundance of predicted targets was examined...
October 2015: Hypertension
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