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Breast cancer microRNA

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https://www.readbyqxmd.com/read/28732387/the-micrornas-mir-200b-3p-and-mir-429-5p-target-the-limk1-cfl1-pathway-to-inhibit-growth-and-motility-of-breast-cancer-cells
#1
Dengfeng Li, Hong Wang, Hongming Song, Hui Xu, Bingkun Zhao, Chenyang Wu, Jiashu Hu, Tianqi Wu, Dan Xie, Junyong Zhao, Qiang Shen, Lin Fang
Triple-negative breast cancer (TNBC) has the worst prognosis of all subtypes of breast cancer (BC), with limited options for conventional therapy and no targeted therapies. MicroRNAs (miRNAs) are small noncoding RNAs that negatively regulate gene expression. In this study, we aimed to determine whether two members of the miR-200 family, miR-200b-3p and miR-429-5p, are involved in BC cell proliferation and motility and to elucidate their target genes and pathways. We performed a meta-analysis that reveals down-regulated expression of miR-200b-3p and miR-429-5p in BC tissues and cell lines, consistent with a lower expression of miR-200b-3p and miR-429-5p in MDA-MB-231 and HCC1937 cells than in MCF-7 and MCF-10 cells...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28731125/n-peptide-of-vmip-%C3%A2-reverses-paclitaxel-resistance-by-regulating-mirna-335-in-breast-cancer
#2
Yangyang Wang, Haifeng Wang, Yongxing Ding, Yu Li, Sulian Chen, Lingyu Zhang, Haihua Wu, Jihong Zhou, Kecai Duan, Wenrui Wang, Changjie Chen, Qingling Yang
Acquisition of resistance to paclitaxel is one of the most important problems in treatment of breast cancer patients, but the molecular mechanisms underlying sensitivity to paclitaxel remains elusive. Emerging evidence has demonstrated that microRNAs (miRNAs) play important roles in regulation of cell growth, migration and invasion through inhibiting the expression of its target genes. In our previous studies, we have shown that microRNA-335 (miR‑335) decreased obviously between paclitaxel-resistant (PR) and parental breast cancer cells through miRNA microarray...
July 19, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28720752/a-quasi-direct-lc-ms-ms-based-targeted-proteomics-approach-for-mirna-quantification-via-a-covalently-immobilized-dna-peptide-probe
#3
Liang Liu, Qingqing Xu, Shuai Hao, Yun Chen
MicroRNAs (miRNAs) play a vital role in regulating gene expression and are associated with a variety of cancers, including breast cancer. Their distorted and unique expression is a potential marker in clinical diagnoses and prognoses. Thus, accurate determination of miRNA expression levels is a prerequisite for their applications. However, the assays currently available for miRNA detection typically require pre-enrichment, amplification and labeling steps, and most of the assays are only semi-quantitative. Therefore, we developed a quasi-direct liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based targeted proteomics approach to quantify target miRNA by innovatively converting the miRNA signal into the mass response of a reporter peptide via a covalently immobilized DNA-peptide probe...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719355/mirna-223-suppresses-foxo1-and-functions-as-a-potential-tumor-marker-in-breast-cancer
#4
Y-T Wei, D-W Guo, X-Z Hou, D-Q Jiang
Breast cancer is the most commonly diagnosed cancer in women and a leading cause of cancer mortality. MicroRNAs (miRNAs) have been found to play a key role in proliferation, metastasis and invasion of cancer. In previous study, we found that miRNA-223 was significant expression inexosome derived from peripheral blood serum of breast cancer patients than in samples from control subjects, Therefor,the role ofmiRNA-223willbe researched in MCF-7 breast cancer cells.In this study, to explore the role of miRNA-223in influencing cell proliferation, metastasis and invasion of breast cancer, TargetScan tools (http://www...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28719033/identification-of-driver-copy-number-alterations-in-diverse-cancer-types-and-application-in-drug-repositioning
#5
Wenbin Zhou, Zhangxiang Zhao, Ruiping Wang, Yue Han, Chengyu Wang, Fan Yang, Ya Han, Haihai Liang, Lishuang Qi, Chenguang Wang, Zheng Guo, Yunyan Gu
Results from numerous studies suggest an important role for somatic copy number alterations (SCNAs) in cancer progression. Our work aimed to identify the drivers (oncogenes or tumor suppressor genes) that reside in recurrently aberrant genomic regions, including a large number of genes or non-coding genes, which remain a challenge for decoding the SCNAs involved in carcinogenesis. Here, we propose a new approach to comprehensively identify drivers, using 8740 cancer samples involving 18 cancer types from The Cancer Genome Atlas (TCGA)...
July 18, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28717596/phenotypic-and-microrna-transcriptomic-profiling-of-the-mda-mb-231-spheroid-enriched-cscs-with-comparison-of-mcf-7-microrna-profiling-dataset
#6
Lily Boo, Wan Yong Ho, Norlaily Mohd Ali, Swee Keong Yeap, Huynh Ky, Kok Gan Chan, Wai Fong Yin, Dilan Amila Satharasinghe, Woan Charn Liew, Sheau Wei Tan, Soon Keng Cheong, Han Kiat Ong
Breast cancer spheroids have been widely used as in vitro models of cancer stem cells (CSCs), yet little is known about their phenotypic characteristics and microRNAs (miRNAs) expression profiles. The objectives of this research were to evaluate the phenotypic characteristics of MDA-MB-231 spheroid-enriched cells for their CSCs properties and also to determine their miRNAs expression profile. Similar to our previously published MCF-7 spheroid, MDA-MB-231 spheroid also showed typical CSCs characteristics namely self-renewability, expression of putative CSCs-related surface markers and enhancement of drug resistance...
2017: PeerJ
https://www.readbyqxmd.com/read/28716024/mir-661-promotes-tumor-invasion-and-metastasis-by-directly-inhibiting-rb1-in-non-small-cell-lung-cancer
#7
Feiye Liu, Yanjun Cai, Xiaoxiang Rong, Jinzhang Chen, Dayong Zheng, Lu Chen, Junyi Zhang, Rongcheng Luo, Peng Zhao, Jian Ruan
BACKGROUND: Aberrant microRNA expression has been implicated in metastasis of cancers. MiR-661 accelerates proliferation and invasion of breast cancer and ovarian cancer, while impedes that of glioma. Its role in non small cell lung cancer (NSCLC) and underlying mechanism are worthy elucidation. METHODS: Expression of miR-661 was measured with real-time PCR in both NSCLC tissues and cell lines. The effects of miR-661 on migration, invasion and metastasis capacity of NSCLC were evaluated using wound healing, transwell assay and animal models...
July 17, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28715648/tumor-suppressor-candidate-2-tusc2-fus-1-and-human-cancers
#8
Tadas Rimkus, Sherona Sirkisoon, Alexandra Harrison, Hui-Wen Lo
Tumor suppressor candidate 2 (TUSC2, also known as FUS1) was identified in 2000 as a candidate tumor suppressor gene located in a region on chromosome 3p21.3 that is homozygously deleted in some lung and breast cancers. The deletion is rare in lung and breast cancers, but is frequent in malignant pleural mesothelioma. Evidence to date indicates that TUSC2 behaves as a tumor suppressor in lung cancer; however, its role as a tumor suppressor for other tumor types has not been fully established. Loss of TUSC2 expression at the mRNA and protein levels has been reported in various cancers...
May 2017: Discovery Medicine
https://www.readbyqxmd.com/read/28704935/entrainment-of-breast-cell-lines-results-in-rhythmic-fluctuations-of-micrornas
#9
Rafael Chacolla-Huaringa, Jorge Moreno-Cuevas, Victor Trevino, Sean-Patrick Scott
Circadian rhythms are essential for temporal (~24 h) regulation of molecular processes in diverse species. Dysregulation of circadian gene expression has been implicated in the pathogenesis of various disorders, including hypertension, diabetes, depression, and cancer. Recently, microRNAs (miRNAs) have been identified as critical modulators of gene expression post-transcriptionally, and perhaps involved in circadian clock architecture or their output functions. The aim of the present study is to explore the temporal expression of miRNAs among entrained breast cell lines...
July 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28702505/human-snorna-93-is-processed-into-a-microrna-like-rna-that-promotes-breast-cancer-cell-invasion
#10
Dillon G Patterson, Justin T Roberts, Valeria M King, Dominika Houserova, Emmaline C Barnhill, Aline Crucello, Caroline J Polska, Lucas W Brantley, Garrett C Kaufman, Michael Nguyen, Megann W Santana, Ian A Schiller, Julius S Spicciani, Anastasia K Zapata, Molly M Miller, Timothy D Sherman, Ruixia Ma, Hongyou Zhao, Ritu Arora, Alexander B Coley, Melody M Zeidan, Ming Tan, Yaguang Xi, Glen M Borchert
Genetic searches for tumor suppressors have recently linked small nucleolar RNA misregulations with tumorigenesis. In addition to their classically defined functions, several small nucleolar RNAs are now known to be processed into short microRNA-like fragments called small nucleolar RNA-derived RNAs. To determine if any small nucleolar RNA-derived RNAs contribute to breast malignancy, we recently performed a RNA-seq-based comparison of the small nucleolar RNA-derived RNAs of two breast cancer cell lines (MCF-7 and MDA-MB-231) and identified small nucleolar RNA-derived RNAs derived from 13 small nucleolar RNAs overexpressed in MDA-MB-231s...
2017: NPJ Breast Cancer
https://www.readbyqxmd.com/read/28701793/the-mir-29-transcriptome-in-endocrine-sensitive-and-resistant-breast-cancer-cells
#11
Penn Muluhngwi, Negin Alizadeh-Rad, Stephany L Vittitow, Ted S Kalbfleisch, Carolyn M Klinge
Aberrant microRNA expression contributes to breast cancer progression and endocrine resistance. We reported that although tamoxifen stimulated miR-29b-1/a transcription in tamoxifen (TAM)-resistant breast cancer cells, ectopic expression of miR-29b-1/a did not drive TAM-resistance in MCF-7 breast cancer cells. However, miR-29b-1/a overexpression significantly repressed TAM-resistant LCC9 cell proliferation, suggesting that miR-29b-1/a is not mediating TAM resistance but acts as a tumor suppressor in TAM-resistant cells...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700919/translating-cerna-susceptibilities-into-correlation-functions
#12
Araks Martirosyan, Matteo Marsili, Andrea De Martino
Competition to bind microRNAs induces an effective positive cross talk between their targets, which are therefore known as "competing endogenous RNAs" (ceRNAs). Although such an effect is known to play a significant role in specific situations, estimating its strength from data and experimentally in physiological conditions appears to be far from simple. Here, we show that the susceptibility of ceRNAs to different types of perturbations affecting their competitors (and hence their tendency to cross talk) can be encoded in quantities as intuitive and as simple to measure as correlation functions...
July 11, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28698800/metformin-induced-ablation-of-microrna-21-5p-releases-sestrin-1-and-cab39l-antitumoral-activities
#13
Claudio Pulito, Federica Mori, Andrea Sacconi, Frauke Goeman, Maria Ferraiuolo, Patrizia Pasanisi, Carlo Campagnoli, Franco Berrino, Maurizio Fanciulli, Rebecca J Ford, Massimo Levrero, Natalia Pediconi, Ludovica Ciuffreda, Michele Milella, Gregory R Steinberg, Mario Cioce, Paola Muti, Sabrina Strano, Giovanni Blandino
Metformin is a commonly prescribed type II diabetes medication that exhibits promising anticancer effects. Recently, these effects were found to be associated, at least in part, with a modulation of microRNA expression. However, the mechanisms by which single modulated microRNAs mediate the anticancer effects of metformin are not entirely clear and knowledge of such a process could be vital to maximize the potential therapeutic benefits of this safe and well-tolerated therapy. Our analysis here revealed that the expression of miR-21-5p was downregulated in multiple breast cancer cell lines treated with pharmacologically relevant doses of metformin...
2017: Cell Discovery
https://www.readbyqxmd.com/read/28697793/collagen-triple-helix-repeat-containing-1-negatively-regulated-by-microrna-30c-promotes-cell-proliferation-and-metastasis-and-indicates-poor-prognosis-in-breast-cancer
#14
Yuan-Hui Lai, Jian Chen, Xiao-Ping Wang, Yan-Qing Wu, Hai-Tao Peng, Xiao-Hong Lin, Wen-Jian Wang
BACKGROUND: Collagen triple helix repeat containing-1 (CTHRC1), which was firstly identified overexpressed in the adventitia and neointima of injured rat arteries, could inhibit collagen expression and increase cell migration. It was then found to be ubiquitously expressed in numerous cell types such as fibroblasts and smooth muscle cells, and aberrantly up-regulated in several malignant tumors. However, the functional role of CTHRC1 and its related mechanism in breast cancer still remains unclear...
July 12, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28693279/microrna-215-acts-as-a-tumor-suppressor-in-breast-cancer-by-targeting-akt-serine-threonine-kinase-1
#15
Jian Yao, Ping Zhang, Jin Li, Wei Xu
There are accumulating reports that microRNAs are dysregulated in a number of human cancer types, and that they may function as tumor suppressors or oncogenes in tumorigenesis and tumor development. microRNA-215 (miR-215) has been identified as a tumor suppressor in epithelial ovarian, pancreatic, non-small cell lung and colon cancer, whereas it may act as an oncogene in gastric and cervical cancer. The role of miR-215 in breast cancer carcinogenesis and progression has yet to be elucidated. In the present study, the expression level of miR-215 was determined in breast cancer tissues and cell lines using the reverse transcription-quantitative polymerase chain reaction...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28693273/overexpression-of-mir-183-and-mir-494-promotes-proliferation-and-migration-in-human-breast-cancer-cell-lines
#16
Taciane Macedo, Renato J Silva-Oliveira, Viviane A O Silva, Daniel O Vidal, Adriane F Evangelista, Marcia M C Marques
Breast cancer (BC) is a leading cause of cancer-associated mortality in females worldwide. MicroRNAs (miRNAs or miRs), a type of non-coding RNA, have been reported to be important in the regulation of BC onset and progression. Several studies have implicated the role of miR-183 and miR-494 in different types of cancer. However, the biological functions of these miRNAs in BC remain largely unknown. In the present study, the expression of both miRNAs was assessed in the MDA-MB-231 and MDA-MB-468 BC cell lines...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28692034/mir-200b-inhibits-proliferation-and-metastasis-of-breast-cancer-by-targeting-fucosyltransferase-iv-and-%C3%AE-1-3-fucosylated-glycans
#17
Q Zheng, X Cui, D Zhang, Y Yang, X Yan, M Liu, B Niang, F Aziz, S Liu, Q Yan, J Liu
Aberrant protein fucosylation is associated with cancer malignancy. Fucosyltransferase IV (FUT4) is the key enzyme catalyzing the biosynthesis of α1,3-linkage fucosylated glycans carried by glycoproteins on the cell surface, such as the tumor-associated sugar antigen Lewis Y (LeY). An abnormal increase in the levels of FUT4 and LeY is observed in many cancers and correlated with cell proliferation and metastasis. Some microRNAs (miRNAs) are known to negatively regulate gene expression. FUT4 is an oncogenic glycogene, and thus it is important to identify the specific miRNA targeting FUT4...
July 10, 2017: Oncogenesis
https://www.readbyqxmd.com/read/28691018/genetic-variants-in-the-promoter-region-of-mir-10b-and-the-risk-of-breast-cancer
#18
Jiaping Chen, Yue Jiang, Jing Zhou, Sijun Liu, Yayun Gu, Guangfu Jin, Zhibin Hu, Hongxia Ma, Hongbing Shen, Juncheng Dai
Variants in microRNA genes may affect their expression by interfering with the microRNA maturation process and may substantially contribute to the risk of breast cancer. Recent studies have identified miR-10b as an interesting candidate because of its close association with the metastatic behavior of breast cancer. However, the roles of miR-10b-related single nucleotide polymorphisms in breast cancer susceptibility remain unclear. This case-control study evaluated the associations between variants in the upstream transcription regulation region of miR-10b and the risk of breast cancer among Chinese women...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28685672/micrornas-mediated-mmp-regulation-current-diagnostic-and-therapeutic-strategies-for-metabolic-syndrome
#19
Sharad Saxena, Aditi Jain, Vibha Rani
Metabolic syndrome (MS) is a global socioeconomic problem rapidly progressing in accordance with increasing body mass index (BMI) and age. It is a consortium of risk factors, such as dyslipidaemia, insulin resistance, leptin resistance, reduced adiponectin, glucose intolerance, hyperglycemia, and hypertension. Collectively, these factors accelerate the onset of type 2 diabetes mellitus, cardiovascular disease, stroke, and certain cancers such as breast, liver pancreatic, and colon cancer. Extracellular matrix (ECM) and basement membrane remodeling play a central role during pathogenesis of MS as they regulate diverse cell functions including proliferation, differentiation, and migration...
July 7, 2017: Current Gene Therapy
https://www.readbyqxmd.com/read/28685435/hypoxia-related-tumor-acidosis-affects-microrna-expression-pattern-in-prostate-and-breast-tumor-cells
#20
A Riemann, S Reime, O Thews
MicroRNAs (miRNAs) are small non-coding RNA sequences which are able to modulate the expression of many functional proteins. The expression level of miRNAs can be modulated by parameters of the tumor microenvironment like hypoxia, nutrient deprivation or oxidative stress. Since miRNAs can act either as oncogenes or tumor suppressors, this may affect malignant progression or therapy resistance. In the present study it was analyzed whether extracellular acidosis can impact on miRNA expression. Therefore, tumor cells (R3327-AT-1 prostate and Walker-256 mammary carcinoma cells) were incubated at pH 6...
2017: Advances in Experimental Medicine and Biology
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