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https://www.readbyqxmd.com/read/29344885/microrna-networks-in-breast-cancer-cells
#1
Andliena Tahiri, Miriam R Aure, Vessela N Kristensen
A variety of molecular techniques can be used in order to unravel the molecular composition of cells. In particular, the microarray technology has been used to identify novel biomarkers that may be useful in the diagnosis, prognosis, or treatment of cancer. The microarray technology is ideal for biomarker discovery as it allows for the screening of a large number of molecules at once. In this review, we focus on microRNAs (miRNAs) which are key molecules in cells and regulate gene expression post-transcriptionally...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29344210/microrna-335-is-downregulated-in-papillary-thyroid-cancer-and-suppresses-cancer-cell-growth-migration-and-invasion-by-directly-targeting-zeb2
#2
Quan'e Kan, Yong Su, Huihui Yang
MicroRNAs (miRs) are a group of short, endogenous, non-protein-coding and single-stranded RNAs that regulate gene expression by binding to the 3'-untranslated region (3'UTR) of mRNAs, which results in their degradation or translational repression. The aim of the present study was to investigate the expression and function of miR-335 in human papillary thyroid cancer (PTC). Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was performed to quantify the relative miR-335 expression levels in PTC tissues and cell lines...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29344113/downregulated-mirna-1269a-variant-rs73239138-decreases-the-susceptibility-to-gastric-cancer-via-targeting-znf70
#3
Wenshuai Li, Huilu Zhang, Pei Min, Jie Zhu, Diannan Xu, Weiru Jiang, Yanyun Ma, Jigang Qiu, Weihong Xu, Jian Chen, Mingqing Zhang, Min Li, Dongqin Yang, Jianping Shi, Jun Zhang, Jie Liu
Although emerging evidence has indicated that single nucleotide polymorphisms (SNPs) in microRNAs (miRNAs) are associated with susceptibility to gastric cancer, a limited number of studies have revealed the underlying molecular mechanisms. In the present study, the results suggested that miR-1269a rs73239138 has a role in decreasing the risk of gastric cancer. The level of miR-1269a variant expression was significantly downregulated compared with the wild-type miR-1269a in the gastric cells (Fig. 1). Furthermore, overexpression of miR-1269a inhibited apoptosis of gastric cancer cells...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29340361/a-curcumin-loaded-polymeric-micelle-as-a-carrier-of-a-microrna-21-antisense-oligonucleotide-for-enhanced-anti-tumor-effects-in-a-glioblastoma-animal-model
#4
Xiaonan Tan, Gyeungyun Kim, Dahee Lee, Jungju Oh, Minkyung Kim, Chunxian Piao, Jaewon Lee, Min Sang Lee, Ji Hoon Jeong, Minhyung Lee
A glioblastoma is a common primary brain tumor that expresses microRNA-21 (miR-21), which inhibits the expression of pro-apoptotic genes such as phosphatase and tensin homologue (PTEN) and programmed cell death 4 (PDCD4). Therefore, an antisense-oligonucleotide against miR-21 (miR21ASO) could have therapeutic effects for glioblastomas. In this study, curcumin was loaded into deoxycholic acid-conjugated polyethylenimine (DP) micelles. The curcumin-loaded DP micelle (DP-Cur) was evaluated as a carrier for the combined delivery of curcumin and miR21ASO...
January 17, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29329703/highly-sensitive-microrna-detection-based-on-bio-bar-code-assay-and-catalytic-hairpin-assembly-two-stage-amplification
#5
Songsong Tang, Yuan Gu, Huiting Lu, Haifeng Dong, Kai Zhang, Wenhao Dai, Xiangdan Meng, Fan Yang, Xueji Zhang
Herein, a highly-sensitive microRNA (miRNA) detection strategy was developed by combining bio-bar-code assay (BBA) with catalytic hairpin assembly (CHA). In the proposed system, two nanoprobes of magnetic nanoparticles functionalized with DNA probes (MNPs-DNA) and gold nanoparticles with numerous barcode DNA (AuNPs-DNA) were designed. In the presence of target miRNA, the MNP-DNA and AuNP-DNA hybridized with target miRNA to form a "sandwich" structure. After "sandwich" structures were separated from the solution by the magnetic field and dehybridized by high temperature, the barcode DNA sequences were released by dissolving AuNPs...
April 3, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29319168/hepatic-mir-125b-inhibits-insulin-signaling-pathway-by-targeting-pik3cd
#6
Xiliang Du, Xiaobing Li, Liang Chen, Min Zhan, Lin Lei, Wenwen Gao, Zhen Shi, Yuhao Dong, Zhe Wang, Xinwei Li, Guowen Liu
Insulin resistance is often characterized as the most critical factor contributing to the development of (T2D) type 2 diabetes. MicroRNAs (miRNAs) are endogenous non-coding short single-stranded RNAs that function as negative regulators in many physiological and pathological processes. The objective of this study was to evaluate the roles of miR-125b in the regulation of insulin sensitivity in hepatocytes. We found that hepatic miR-125b levels were significantly increased in the patients with type 2 diabetes, high fat diet (HFD) mice, ob/ob and db/db mice...
January 10, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29315268/mirna-influences-in-neuroblast-modulation-an-introspective-analysis
#7
REVIEW
Vanessa Zammit, Byron Baron, Duncan Ayers
Neuroblastoma (NB) is the most common occurring solid paediatric cancer in children under the age of five years. Whether of familial or sporadic origin, chromosome abnormalities contribute to the development of NB and cause dysregulation of microRNAs (miRNAs). MiRNAs are small non-coding, single stranded RNAs that target messenger RNAs at the post-transcriptional levels by repressing translation within all facets of human physiology. Such gene 'silencing' activities by miRNAs allows the development of regulatory feedback loops affecting multiple functions within the cell, including the possible differentiation of neural stem cell (NSC) lineage selection...
January 9, 2018: Genes
https://www.readbyqxmd.com/read/29312814/on-revealing-the-gene-targets-of-ebola-virus-micrornas-involved-in-the-human-skin-microbiome
#8
Pei-Chun Hsu, Bin-Hao Chiou, Chun-Ming Huang
Ebola virus, a negative-sense single-stranded RNA virus, causes severe viral hemorrhagic fever and has a high mortality rate. Histopathological and immunopathological analyses of Ebola virus have revealed that histopathological changes in skin tissue are associated with various degrees of endothelial cell swelling and necrosis. The interactions of microbes within or on a host are a crucial for the skin immune shield. The discovery of microRNAs (miRNAs) in Ebola virus implies that immune escape, endothelial cell rupture, and tissue dissolution during Ebola virus infection are a result of the effects of Ebola virus miRNAs...
2018: PeerJ
https://www.readbyqxmd.com/read/29307175/an-ultrasensitive-fret-sef-probe-for-sensing-and-imaging-micrornas-in-living-cells-based-on-gold-nano-conjugates
#9
Jiadi Sun, Fuwei Pi, Jian Ji, Hongtao Lei, Zhixian Gao, Yinzhi Zhang, Jean de Dieu Habimana, Zaijun Li, Xiulan Sun
MicroRNAs (miRNAs), a kind of single-stranded small RNA molecules, play significant roles in the physiological and pathological processes of human beings. Currently, miRNAs had been demonstrated as important biomarkers critically related to many diseases and life nature,including several cancers and cell senescence. It is valuable to establish sensitive assays for monitoring the levels of intracellular up-regulated/down-regulated miRNA expression, which would contribute to the early prediction of the tumor risk and cardiovascular disease...
January 8, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29301499/coordinated-expression-and-genetic-polymorphisms-in-grainyhead-like-genes-in-human-non-melanoma-skin-cancers
#10
Agnieszka Kikulska, Tobias Rausch, Ewa Krzywinska, Magdalena Pawlak, Bartek Wilczynski, Vladimir Benes, Piotr Rutkowski, Tomasz Wilanowski
BACKGROUND: The Grainyhead-like (GRHL) transcription factors have been linked to many different types of cancer. However, no previous study has attempted to investigate potential correlations in expression of different GRHL genes in this context. Furthermore, there is very little information concerning damaging mutations and/or single nucleotide polymorphisms in GRHL genes that may be linked to cancer. METHODS: DNA and RNA were extracted from human non-melanoma skin cancers (NMSC) and adjacent normal tissues (n = 33 pairs of samples)...
January 4, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29296236/combined-microrna-and-mrna-microfluidic-taqman-array-cards-for-the-diagnosis-of-malignancy-of-multiple-types-of-pancreatico-biliary-tumors-in-fine-needle-aspiration-material
#11
Thomas M Gress, Ludwig Lausser, Lyn-Rouven Schirra, Lisa Ortmüller, Ramona Diels, Bo Kong, Christoph W Michalski, Thilo Hackert, Oliver Strobel, Nathalia A Giese, Miriam Schenk, Rita T Lawlor, Aldo Scarpa, Hans A Kestler, Malte Buchholz
Pancreatic ductal adenocarcinoma (PDAC) continues to carry the lowest survival rates among all solid tumors. A marked resistance against available therapies, late clinical presentation and insufficient means for early diagnosis contribute to the dismal prognosis. Novel biomarkers are thus required to aid treatment decisions and improve patient outcomes. We describe here a multi-omics molecular platform that allows for the first time to simultaneously analyze miRNA and mRNA expression patterns from minimal amounts of biopsy material on a single microfluidic TaqMan Array card...
December 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/29295726/mir-346-promotes-hcc-progression-by-suppressing-breast-cancer-metastasis-suppressor-1-expression
#12
Zhixian Guo, Jingjing Li, Jihong Sun, Lu Sun, Yubing Zhou, Zujiang Yu
Hepatocellular carcinoma (HCC) is one of the most common malignant tumors all around the world. MicroRNA (miRNA) is a class of non coding single stranded RNA molecules, involved in regulating cancer cell proliferation, metastasis, migration, invasion and apoptosis. We showed that the expression of miR-346 was significantly increased in HCC tissues and cell lines, compared with non-cancerous controls, and was associated with poor prognosis. Over-expression of miR-346 promoted proliferation and inhibited apoptosis of SMMC-7721 cells, while knockdown of miR-346 significantly suppressed proliferation and induced apoptosis of HepG2 cells...
January 2, 2018: Oncology Research
https://www.readbyqxmd.com/read/29291166/two-color-based-nanoflares-for-multiplexed-micrornas-imaging-in-live-cells
#13
Jing Li, Jin Huang, Xiaohai Yang, Yanjing Yang, Ke Quan, Nuli Xie, Yanan Wu, Changbei Ma, Kemin Wang
MicroRNAs (miRNAs) have become an ideal biomarker candidate for early diagnosis of diseases. But various diseases involve changes in the expression of different miRNAs. Therefore, multiplexed assay of miRNAs in live cells can provide critical information for our better understanding of their roles in cells and further validating of their function in clinical diagnoses. Simultaneous detection of multiple biomarkers could effectively improve the accuracy of early cancer diagnosis. Here, we develop the two-color-based nanoflares for simultaneously detecting two distinct miRNA targets inside live cells...
2018: Nanotheranostics
https://www.readbyqxmd.com/read/29283424/integrated-microrna-mrna-analysis-reveals-mir-204-inhibits-cell-proliferation-in-gastric-cancer-by-targeting-cks1b-cxcl1-and-gprc5a
#14
Sirjana Shrestha, Chi-Dung Yang, Hsiao-Chin Hong, Chih-Hung Chou, Chun-San Tai, Men-Yee Chiew, Wen-Liang Chen, Shun-Long Weng, Chung-Chu Chen, Yi-An Chang, Meng-Lin Lee, Wei-Yun Huang, Sheng-Da Hsu, Yi-Chang Chen, Hsien-Da Huang
Gastric cancer (GC) is the second most frequent cause of cancer-related deaths worldwide. MicroRNAs are single-stranded RNA molecules of 21-23 nucleotides that regulate target gene expression through specific base-pairing interactions between miRNA and untranslated regions of targeted mRNAs. In this study, we generated a multistep approach for the integrated analysis of miRNA and mRNA expression. First, both miRNA and mRNA expression profiling datasets in gastric cancer from the Gene Expression Omnibus (GEO) and The Cancer Genome Atlas (TCGA) identified 79 and 1042 differentially expressed miRNAs and mRNAs, respectively, in gastric cancer...
December 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29277634/a-sensitive-flow-cytometric-method-for-multi-parametric-analysis-of-microrna-messenger-rna-and-protein-in-single-cells
#15
Chunfai Lai, Dariusz Stepniak, Leslie Sias, Castle Funatake
Analysis of RNA expression in mixed cell populations often requires laborious and costly cell sorting. Here we describe a flow cytometric assay that combines antibody staining and in situ hybridization for multi-parametric analysis of single cells. This method, referred to as the PrimeFlowTM RNA Assay, enables simultaneous detection of protein markers and RNA targets in mixed cell populations. Both coding and non-coding RNA sequences can be measured with a limit of detection of approximately 10 copies of mRNA and 20 copies of microRNA per cell...
December 19, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/29275364/genetic-variations-in-the-3-untranslated-regions-of-genes-involved-in-the-cell-cycle-and-apoptosis-pathways-affect-bladder-cancer-risk
#16
Qiang Zhang, Wenying Wang, Weidong Xu, Mulong DU, Gaoxiang Ma, Hanting Liu, Haiyan Chu, N A Tong, Meilin Wang, Jianfeng Shao, Zhengdong Zhang, Lin Yuan, Jing Qian
BACKGROUND: Key genes related to cell cycle and apoptosis pathways play critical roles in bladder cancer. Single nucleotide polymorphisms (SNPs) in the 3'-untranslated regions (3'-UTR) of genes may impact microRNA (miRNA)-messenger RNA (mRNA) binding capacity and alter gene expression to contribute to the susceptibility of cancers. However, an association of genetic variations in cell cycle and apoptosis pathways with bladder cancer risk, has not been reported. MATERIALS AND METHODS: We selected SNPs in the 3'-UTR of cell cycle and apoptosis pathways genes and genotyped them with a case-control study consisting of 578 bladder cancer patients and 1,006 cancer-free subjects...
January 2018: Cancer Genomics & Proteomics
https://www.readbyqxmd.com/read/29247721/polymorphisms-in-the-canine-il7r-3-utr-are-associated-with-thymic-output-in-labrador-retriever-dogs-and-influence-post-transcriptional-regulation-by-microrna-185
#17
Angela Holder, Gareth Jones, Francesca Soutter, Donald B Palmer, Richard Aspinall, Brian Catchpole
Interleukin-7 (IL-7) and its receptor (IL-7R) are essential for T cell development in the thymus, and changes in the IL-7/IL-7R pathway have been implicated in age-associated thymic involution which results in a reduction of naïve T cell output. The aim of this study was to investigate the relationship between IL7 and IL7R genetic variation and thymic output in dogs. No single nucleotide polymorphisms (SNPs) were identified in the canine IL7 gene, but a number were present in the canine IL7R gene. Polymorphisms in the IL7R exon 8 and 3'UTR were found to be associated with signal joint T cell receptor excision circle (sj-TREC) values (a biomarker of thymic output) in young and geriatric Labrador retrievers...
December 13, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29244808/fgmd-a-novel-approach-for-functional-gene-module-detection-in-cancer
#18
Daeyong Jin, Hyunju Lee
With the increasing availability of multi-dimensional biological datasets for the same samples (i.e., gene expression, microRNAs, copy numbers, mutations, methylations), it has now become possible to systematically understand the regulatory mechanisms operating in a cancer cell. For this task, it is important to discover a set of co-expressed genes with functions, representing a so-called functional gene module, because co-expressed genes tend to be co-regulated by the same regulators, including transcription factors, microRNAs, and copy number aberrations...
2017: PloS One
https://www.readbyqxmd.com/read/29236255/identifying-mirna-targets-using-ago-ripseq
#19
Rebecca Petri, Johan Jakobsson
microRNAs (miRNA) are small, noncoding RNAs that bind to messenger RNAs (mRNAs) and regulate their activity. They are, therefore, important posttranscriptional regulators. In recent years it has become clear that miRNAs regulate large genetic networks, rather than single genes, and that one gene can be targeted by several miRNAs. To understand the role of miRNAs in cells or tissues, it is therefore important to analyze the targetome of miRNAs. Here, we present a technique called Argonaute-RNA Immunoprecipitation (AGO-RIP) which takes advantages of the fact that miRNAs and their targets are directly bound by the Argonaute protein family...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29227754/genetic-variant-in-mir-124-decreased-the-susceptibility-to-esophageal-squamous-cell-carcinoma-in-a-chinese-kazakh-population
#20
Fei Wu, Mei Li, Weiyan You, Yu Ji, Xiaobin Cui, Jianming Hu, Yunzhao Chen, Lijuan Pang, Shugang Li, Yutao Wei, Lan Yang, Feng Li
AIMS: Esophageal squamous cell carcinoma (ESCC) is characterized by high prevalence and mortality worldwide, and it is very highly prevalent in China. ESCC is caused by various factors, including microRNAs (miRNAs) whose expression have been shown to play a major role in tumor generation. Single nucleotide polymorphisms (SNPs) in miRNAs could affect susceptibility to numerous cancers. This study aimed to evaluate the relationship between SNPs in miR-124 and ESCC risk in the Chinese Kazakh population...
December 11, 2017: Genetic Testing and Molecular Biomarkers
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