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Breast cancer cell, microRNA

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https://www.readbyqxmd.com/read/29044199/fluorescence-coded-dna-nanostructure-probe-system-to-enable-discrimination-of-tumor-heterogeneity-via-a-screening-of-dual-intracellular-microrna-signatures-in-situ
#1
Seung Won Shin, Byoung Sang Lee, Kisuk Yang, Lunjakorn Amornkitbamrung, Min Su Jang, Bo Mi Ku, Seung-Woo Cho, Jung Heon Lee, Hojae Bae, Byung-Keun Oh, Myung-Ju Ahn, Yong Taik Lim, Soong Ho Um
Since the delivery kinetics of different cell types are different, the signal from the target cell is greatly affected by the noise signal of the diagnostic system. This is a major obstacle hindering the practical application of intracellular diagnostic systems, such as tumor heterogeneity. To address these issues, here we present a microRNA detection platform using fluorescence-encoded nanostructured DNA-based probes. The nanostructured DNA was designed to include molecular beacons for detecting cytosolic microRNA as well as additional fluorophores...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29038000/epigenetic-regulation-of-mir-200-as-the-potential-strategy-for-the-therapy-against-triple-negative-breast-cancer
#2
REVIEW
M Janaki Ramaiah, Shaik Mohammad Naushad, P O N Lavanya, A Gayatri, S Vaishnave, Manika Pal-Bhadra
MicroRNAs (miRNAs) are a class of small, non-coding RNAs that are involved in the regulation of gene expression at the post-transcriptional level. MicroRNAs play an important role in cancer cell proliferation, survival and apoptosis. Epigenetic modifiers regulate the microRNA expression. Among the epigenetic players, histone deacetylases (HDACs) function as the key regulators of microRNA expression. Epigenetic machineries such as DNA and histone modifying enzymes and various microRNAs have been identified as the important contributors in cancer initiation and progression...
October 13, 2017: Gene
https://www.readbyqxmd.com/read/29029445/microrna-200c-increases-radiosensitivity-of-human-cancer-cells-with-activated-egfr-associated-signaling
#3
Taeryool Koo, Bong Jun Cho, Dan Hyo Kim, Ji Min Park, Eun Jung Choi, Hans H Kim, David J Lee, In Ah Kim
MicroRNA-200c (miR-200c) recently was found to have tumor-suppressive properties by inhibiting the epithelial-mesenchymal transition (EMT) in several cancers. miR-200c also interacts with various cellular signaling molecules and regulates many important signaling pathways. In this study, we investigated the radiosensitizing effect of miR-200c and its mechanism in a panel of human cancer cell lines. Malignant glioma (U251, T98G), breast cancer (MDA-MB-468), and lung carcinoma (A549) cells were transfected with control pre-microRNA, pre-miR-200c, or anti-miR-200c...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29028086/downregulation-of-microrna-645-suppresses-breast-cancer-cell-metastasis-via-targeting-dcdc2
#4
Y Cai, W-F Li, Y Sun, K Liu
OBJECTIVE: To analyze the functioning mode of miR-645 on breast cancer cell metastasis and provide therapeutic targets for breast cancer. MATERIALS AND METHODS: Quantitative Real-time PCR (qRT-PCR) assay was employed to detect miR-645 expression level. Wound healing assay and transwell assay were performed to investigate metastasis capacity of breast cancer cells. Protein levels were assessed by Western blotting assay. The target gene was predicted and verified by bioinformatics analysis and luciferase assay...
September 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29024936/glucose-insult-elicits-hyperactivation-of-cancer-stem-cells-through-mir-424-cdc42-prdm14-signalling-axis
#5
Sushmita Bose Nandy, Alexis Orozco, Rebecca Lopez-Valdez, Rene Roberts, Ramadevi Subramani, Arunkumar Arumugam, Alok Kumar Dwivedi, Viktoria Stewart, Gautham Prabhakaran, Stephanie Jones, Rajkumar Lakshmanaswamy
BACKGROUND: Meta-analysis shows that women with diabetes have a 20% increased risk of breast cancer and also an increased risk for distant metastasis and mortality. The molecular mechanisms for distant metastasis and mortality in breast cancer patients with diabetes are not very well understood. METHODS: We compared the effect of physiological (5 mM) and diabetic (10 mM) levels of glucose on malignant breast epithelial cell invasion and stemness capabilities...
October 12, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29021233/divergent-activity-of-pseudogene-ptenp1-in-er-positive-and-negative-breast-cancer
#6
Synnøve Yndestad, Eilin Austreid, Kai Ove Skaftnesmo, Per Eystein Lønning, Hans P Eikesdal
Transcripts derived from the PTEN pseudogene (PTENP1) function as decoys to adsorb microRNAs (miRs) targeting the PTEN tumor suppressor for degradation, and PTENP1 upregulation is known to inhibit growth in preclinical cancer models. Here, PTENP1 3'UTR transduction influences PTEN, AKT/mTOR signaling, and tumor progression in estrogen receptor (ER)-positive and negative breast cancer cells. PTENP1 upregulation decreases PTEN gene expression in the ER-positive MCF7 and T47D human breast carcinoma cells and accelerates MCF7 tumor growth in vivo...
October 11, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29017520/the-nuclear-receptor-er%C3%AE-engages-ago2-in-regulation-of-gene-transcription-rna-splicing-and-risc-loading
#7
Roberta Tarallo, Giorgio Giurato, Giuseppina Bruno, Maria Ravo, Francesca Rizzo, Annamaria Salvati, Luca Ricciardi, Giovanna Marchese, Angela Cordella, Teresa Rocco, Valerio Gigantino, Biancamaria Pierri, Giovanni Cimmino, Luciano Milanesi, Concetta Ambrosino, Tuula A Nyman, Giovanni Nassa, Alessandro Weisz
BACKGROUND: The RNA-binding protein Argonaute 2 (AGO2) is a key effector of RNA-silencing pathways It exerts a pivotal role in microRNA maturation and activity and can modulate chromatin remodeling, transcriptional gene regulation and RNA splicing. Estrogen receptor beta (ERβ) is endowed with oncosuppressive activities, antagonizing hormone-induced carcinogenesis and inhibiting growth and oncogenic functions in luminal-like breast cancers (BCs), where its expression correlates with a better prognosis of the disease...
October 6, 2017: Genome Biology
https://www.readbyqxmd.com/read/29016617/microrna-193a-inhibits-breast-cancer-proliferation-and-metastasis-by-downregulating-wt1
#8
FeiYan Xie, Sumayyah Hosany, Shen Zhong, Yang Jiang, Fen Zhang, LiLi Lin, XiaoBo Wang, ShenMeng Gao, XiaoQu Hu
In many cancers, microRNA-193a (miR-193a) is a suppressor miRNA, but its underlying anti-oncogenic activity in breast cancer is not known. In this study, we found decreased miR-193a (specifically, miR-193a-5p) expression not only in breast cancer cell lines but also in breast cancer tissues as compared with the adjacent non-tumor tissues. Ectopic miR-193a overexpression inhibited the proliferation, colony formation, migration, and invasion of MDA-MB-231 and BT549 cells. miR-193a reduced Wilms' tumor 1 (WT1) expression and repressed luciferase reporter activity by binding WT1 coding region sequences; mutation of the predicted miR-193a binding site abolished this effect...
2017: PloS One
https://www.readbyqxmd.com/read/28991230/alu-rna-accumulation-induces-epithelial-to-mesenchymal-transition-by-modulating-mir-566-and-is-associated-with-cancer-progression
#9
F Di Ruocco, V Basso, M Rivoire, P Mehlen, J Ambati, S De Falco, V Tarallo
Alu sequences are the most abundant short interspersed repeated elements in the human genome. Here we show that in a cell culture model of colorectal cancer (CRC) progression, we observe accumulation of Alu RNA that is associated with reduced DICER1 levels. Alu RNA induces epithelial-to-mesenchymal transition (EMT) by acting as a molecular sponge of miR-566. Moreover, Alu RNA accumulates as consequence of DICER1 deficit in colorectal, ovarian, renal and breast cancer cell lines. Interestingly, Alu RNA knockdown prevents DICER1 depletion-induced EMT despite global microRNA (miRNA) downregulation...
October 9, 2017: Oncogene
https://www.readbyqxmd.com/read/28990063/bioinformatics-analysis-of-gene-expression-data-for-the-identification-of-critical-genes-in-breast-invasive-carcinoma
#10
Yi Li, Yongsheng Wang
Gene expression data were analyzed in order to identify critical genes in breast invasive carcinoma (BRCA). Data from 1,073 BRCA samples and 99 normal samples were analyzed, which were obtained from The Cancer Genome Atlas. Differentially expressed genes (DEGs) were identified using the significance analysis of microarrays method and a functional enrichment analysis was performed using the Database for Annotation, Visualization and Integrated Discovery. Relevant microRNAs (miRNAs), transcription factors (TFs) and associated small molecule drugs were revealed by Fisher's exact test...
October 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28987542/establishment-of-twist-1-and-tgfbr2-as-direct-targets-of-microrna-20a-in-mesenchymal-to-epithelial-transition-of-breast-cancer-cell-line-mda-mb-231
#11
Soumasree De, Sayantani Das, Srimoyee Mukherjee, Sainy Das, Sumita Sengupta Bandyopadhyay
Messenchymal to epithelial transition (MET) is a significant physiological phenomenon involved in embryogenesis and cancer. This study aims at investigating the mechanism of microRNA-20a (miR-20a) mediated regulation of mesenchymal to epithelial transition and identification of its direct target genes in breast cancer cell-line, MDA-MB-231. Reduced migratory and invasive property, altered cellular morphology along with reduced capability for attachment to basement membrane was acquired by over-expression of miR-20a in invasive MDA-MB-231 cell-line initially expressing low level of this micro-RNA, indicating direct correlation between abundance of miR-20a and metastatic property...
October 4, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28981542/construction-of-mirna-mirna-networks-revealing-the-complexity-of-mirna-mediated-mechanisms-in-trastuzumab-treated-breast-cancer-cell-lines
#12
Emine Ezel Cilek, Hakime Ozturk, Bala Gur Dedeoglu
Trastuzumab is a monoclonal antibody frequently used to prevent the progression of HER2+ breast cancers, which constitute approximately 20% of invasive breast cancers. microRNAs (miRNAs) are small, non-coding RNA molecules that are known to be involved in gene regulation. With their emerging roles in cancer, they are recently promoted as potential candidates to mediate therapeutic actions by targeting genes associated with drug response. In this study we explored miRNA-mediated regulation of trastuzumab mechanisms by identifying the important miRNAs responsible for the drug response via homogenous network analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28981380/astrocytes-promote-progression-of-breast-cancer-metastases-to-the-brain-via-a-kiss1-mediated-autophagy
#13
Natalya Kaverina, Anton V Borovjagin, Zaira Kadagidze, Anatoly Baryshnikov, Maria Baryshnikova, Dmitry Malin, Dhimankrishhna Ghosh, Nameeta Shah, Danny R Welch, Patrik Gabikian, Apollon Karseladze, Charles Cobbs, Ilya V Ulasov
Formation of metastases, also known as cancer dissemination, is an important stage of breast cancer (BrCa) development. KISS1 expression is associated with inhibition of metastases development. Recently we have demonstrated that BrCa metastases to the brain exhibit low levels of KISS1 expression at both mRNA and protein levels. By using multicolor immunofluorescence and coculture techniques here we show that normal adult astrocytes in the brain are capable of promoting metastatic transformation of circulating breast cancer cells localized to the brain through secretion of chemokine CXCL12...
October 5, 2017: Autophagy
https://www.readbyqxmd.com/read/28981108/involvement-of-mir-451-in-resistance-to-paclitaxel-by-regulating-ywhaz-in-breast-cancer
#14
Wenrui Wang, Lingyu Zhang, Yangyang Wang, Yongxing Ding, Tiantian Chen, Yueyue Wang, Haifeng Wang, Yu Li, Kecai Duan, Sulian Chen, Qingling Yang, Changjie Chen
MicroRNAs (miRNAs) have been identified as major post-transcriptional regulators of the initiation and progression of human cancers, including breast cancer. However, the detail role of miR-451 has not been fully elucidated in breast cancer. In this study, we aimed to investigate the biological role and molecular mechanisms of miR-451 in drug resistance in breast cancer cell lines and in xenograft model. We show that miR-451 is decreased in human breast cancer specimens and in paclitaxel-resistant (PR) cells...
October 5, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28980224/circulating-micrornas-in-patients-with-hormone-receptor-positive-metastatic-breast-cancer-treated-with-dovitinib
#15
Narayan Shivapurkar, Eveline E Vietsch, Erin Carney, Claudine Isaacs, Anton Wellstein
BACKGROUND: Serial analysis of biomarkers in the circulation of patients undergoing treatment ("liquid biopsies") can provide new insights into drug effects. In particular the analysis of cell-free, circulating nucleic acids such as microRNAs (miRs) can reveal altered expression patterns indicative of mechanism of drug action, cancer growth, and tumor-stroma interactions. RESULTS: Here we analyzed plasma miRs in patients with hormone receptor positive, metastatic breast cancer with prior disease progression during aromatase inhibitor therapy (n = 8) in a phase I/II trial with the multiple tyrosine kinase inhibitor dovitinib (TKI258)...
October 4, 2017: Clinical and Translational Medicine
https://www.readbyqxmd.com/read/28979765/micrornas-in-the-development-and-neoplasia-of-the-mammary-gland
#16
REVIEW
Manoj Kumar Jena
Study on the role of microRNAs (miRs) as regulators of gene expression through posttranscriptional gene silencing is currently gaining much interest,due to their wide involvement in different physiological processes. Understanding mammary gland development, lactation, and neoplasia in relation to miRs is essential. miR expression profiling of the mammary gland from different species in various developmental stages shows their role as critical regulators of development. miRs such as miR-126, miR-150, and miR-145 have been shown to be involved in lipid metabolism during lactation...
2017: F1000Research
https://www.readbyqxmd.com/read/28977936/the-regulation-of-hydroxysteroid-17%C3%AE-dehydrogenase-type-1-and-2-gene-expression-in-breast-cancer-cell-lines-by-estradiol-dihydrotestosterone-micrornas-and-genes-related-to-breast-cancer
#17
Erik Hilborn, Olle Stål, Andrey Alexeyenko, Agneta Jansson
AIM: To investigate the influence of estrogen, androgen, microRNAs, and genes implicated in breast cancer on the expression of HSD17B1 and HSD17B2. MATERIALS: Breast cancer cell lines ZR-75-1, MCF7, T47D, SK-BR-3, and the immortalized epithelial cell line MCF10A were used. Cells were treated either with estradiol or dihydrotestosterone for 6, 24, 48 hours, or 7 days or treated with miRNAs or siRNAs predicted to influence HSD17B expression Results and discussion...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28973015/a-small-molecule-drug-promoting-mirna-processing-induces-alternative-splicing-of-mdmx-transcript-and-rescues-p53-activity-in-human-cancer-cells-overexpressing-mdmx-protein
#18
Georgios Valianatos, Barbora Valcikova, Katerina Growkova, Amandine Verlande, Jitka Mlcochova, Lenka Radova, Monika Stetkova, Michaela Vyhnakova, Ondrej Slaby, Stjepan Uldrijan
MdmX overexpression contributes to the development of cancer by inhibiting tumor suppressor p53. A switch in the alternative splicing of MdmX transcript, leading to the inclusion of exon 6, has been identified as the primary mechanism responsible for increased MdmX protein levels in human cancers, including melanoma. However, there are no approved drugs, which could translate these new findings into clinical applications. We analyzed the anti-melanoma activity of enoxacin, a fluoroquinolone antibiotic inhibiting the growth of some human cancers in vitro and in vivo by promoting miRNA maturation...
2017: PloS One
https://www.readbyqxmd.com/read/28964725/how-mirs-and-mrna-deadenylases-could-post-transcriptionally-regulate-expression-of-tumor-promoting-protein-pld
#19
REVIEW
Julian Gomez-Cambronero, Kristen Fite, Taylor E Miller
Phospholipase D (PLD) plays a key role in both cell membrane lipid reorganization and architecture, as well as a cell signaling protein via the product of its enzymatic reaction, phosphatidic acid (PA). PLD is involved in promoting breast cancer cell growth, proliferation, and metastasis and both gene and protein expression are upregulated in breast carcinoma human samples. In spite of all this, the ultimate reason as to why PLD expression is high in cancer cells vs. their normal counterparts remains largely unknown...
August 24, 2017: Advances in Biological Regulation
https://www.readbyqxmd.com/read/28962215/mir-203-inhibits-estrogen-induced-viability-migration-and-invasion-of-estrogen-receptor-%C3%AE-positive-breast-cancer-cells
#20
Jun Lin, Li Wang, Jie Gao, Shiguang Zhu
Breast cancer is common in females, and accounts for a large proportion of cancer-related cases of mortality. MicroRNAs (miRs) have been found to be involved in the progression of breast cancer via mediation of tumor suppressor genes or oncogenes. Previously, miR-203 has been reported to play a suppressive role in breast cancer. In the present study, the effects of miR-203 on the malignant phenotypes of estrogen receptor α (ERα)-positive breast cancer cells were investigated. It was found that treatment with estradiol (E2) significantly enhanced the viability, migration and invasion of ERα-positive breast cancer MCF-7 cells, accompanied by the significant downregulation of miR-203 in a dose-dependent manner...
September 2017: Experimental and Therapeutic Medicine
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