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https://www.readbyqxmd.com/read/27906431/overexpression-of-microrna-365-inhibits-breast-cancer-cell-growth-and-chemo-resistance-through-galnt4
#1
J Zhang, Z Zhang, Q Wang, X-J Xing, Y Zhao
OBJECTIVE: A role of microRNA-365 (miR-365) in the carcinogenesis of breast cancer remains undetermined. In the current study, we addressed this question. PATIENTS AND METHODS: We examined the levels of miR-365 in breast cancer tissue, compared to the paired adjacent non-tumor breast tissue from the patients. We also examined the effects of miR-365 modification on the breast cancer growth and sensitivity to Fluorouracil, as well as the underlying mechanisms. RESULTS: The miR-365 levels in breast cancer tissue were significantly lower than those in control normal breast tissues...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27900034/mir-520e-regulates-cell-proliferation-apoptosis-and-migration-in-breast-cancer
#2
Ming Yi, Minghua Li, Xia Long, Jing Ye, Junwei Cui, Wei Wei, Huijuan Wan, Meijun Yin, Shuying Gao, Zhengming Su, Fangting Zhang
Previous studies have indicated that the deregulation of microRNAs contributes to tumorigenesis. Misregulation of microRNA-520e (miR-520e) has been observed in various types of cancer. However, the expression profile and biological function of miR-520e in breast cancer remains largely unknown. The present study demonstrated that miR-520e expression was significantly increased in breast cancer tissues compared with adjacent non-cancerous breast tissues in 21 patients, as revealed by reverse transcription-quantitative polymerase chain reaction...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27899639/histone-demethylase-phf8-promotes-epithelial-to-mesenchymal-transition-and-breast-tumorigenesis
#3
Peng Shao, Qi Liu, Peterson Kariuki Maina, Jiayue Cui, Thomas B Bair, Tiandao Li, Shaikamjad Umesalma, Weizhou Zhang, Hank Heng Qi
Histone demethylase PHF8 is upregulated and plays oncogenic roles in various cancers; however, the mechanisms underlying its dysregulation and functions in carcinogenesis remain obscure. Here, we report the novel functions of PHF8 in EMT (epithelial to mesenchymal transition) and breast cancer development. Genome-wide gene expression analysis revealed that PHF8 overexpression induces an EMT-like process, including the upregulation of SNAI1 and ZEB1. PHF8 demethylates H3K9me1, H3K9me2 and sustains H3K4me3 to prime the transcriptional activation of SNAI1 by TGF-β signaling...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27895747/overexpression-of-microrna-24-increases-the-sensitivity-to-paclitaxel-in-drug-resistant-breast-carcinoma-cell-lines-via-targeting-abcb9
#4
Jian-Ping Gong, Liu Yang, Jun-Wei Tang, Peng Sun, Qing Hu, Jian-Wei Qin, Xiao-Ming Xu, Bei-Cheng Sun, Jin-Hai Tang
Paclitaxel has been widely used in the treatment of breast cancer. However, the development of drug resistance often increases the failure of chemotherapy. Growing evidence has reported the significant role of microRNAs (miRs) in drug resistance. The present study identified that miR-24 was significantly downregulated in paclitaxel-resistant (PR) breast cancer patients and in MCF-7/PR human breast carcinoma cells, and that overexpression of miR-24 could increase the effect of paclitaxel on drug-resistant breast carcinoma cells...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27895744/identification-of-targets-of-mirna-221-and-mirna-222-in-fulvestrant-resistant-breast-cancer
#5
Pengfei Liu, Manna Sun, Wenhua Jiang, Jinkun Zhao, Chunyong Liang, Huilai Zhang
The present study aimed to identify the differentially expressed genes (DEGs) regulated by microRNA (miRNA)-221 and miRNA-222 that are associated with the resistance of breast cancer to fulvestrant. The GSE19777 transcription profile was downloaded from the Gene Expression Omnibus database, and includes data from three samples of antisense miRNA-221-transfected fulvestrant-resistant MCF7-FR breast cancer cells, three samples of antisense miRNA-222-transfected fulvestrant-resistant MCF7-FR cells and three samples of control inhibitor (green fluorescent protein)-treated fulvestrant-resistant MCF7-FR cells...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27894095/microrna-182-drives-colonization-and-macroscopic-metastasis-via-targeting-its-suppressor-snai1-in-breast-cancer
#6
Yun Zhan, Xukun Li, Xiaoshuan Liang, Lin Li, Bangrong Cao, Baona Wang, Jianlin Ma, Fang Ding, Xiang Wang, Da Pang, Zhihua Liu
Metastasis is a multi-step process. Tumor cells occur epithelial-mesenchymal transition (EMT) to start metastasis, then, they need to undergo a reverse progression of EMT, mesenchymal-epithelial transition (MET), to colonize and form macrometastases at distant organs to complete the whole process of metastasis. Although microRNAs (miRNAs) functions in EMT process are well established, their influence on colonization and macrometastases formation remains unclear. Here, we established an EMT model in MCF-10A cells with SNAI1 overexpression, and characterized some EMT-related microRNAs...
November 24, 2016: Oncotarget
https://www.readbyqxmd.com/read/27894092/a-novel-fully-human-anti-ncl-immunornase-for-triple-negative-breast-cancer-therapy
#7
Chiara D'Avino, Dario Palmieri, Ashley Braddom, Nicola Zanesi, Cindy James, Sara Cole, Francesco Salvatore, Carlo M Croce, Claudia De Lorenzo
Breast cancer is the most common cancer in women worldwide. A new promising anti-cancer therapy involves the use of monoclonal antibodies specific for target tumor-associated antigens (TAAs). A TAA of interest for immunotherapy of Triple Negative Breast Cancer (TNBC) is nucleolin (NCL), a multifunctional protein, selectively expressed on the surface of cancer cells, which regulates the biogenesis of specific microRNAs (miRNAs) involved in tumor development and drug-resistance. We previously isolated a novel human anti-NCL scFv, called 4LB5, that is endowed with selective anti-tumor effects...
November 23, 2016: Oncotarget
https://www.readbyqxmd.com/read/27885248/rs3842530-polymorphism-in-microrna-205-host-gene-in-lung-and-breast-cancer-patients
#8
Fan Zou, Jizhu Li, Xiaohua Jie, Xiong Peng, Ruiqi Fan, Mengmeng Wang, Jiangjie Wang, Zhuoqi Liu, Hua Li, Huan Deng, Xiaohong Yang, Daya Luo
BACKGROUND The expression of miR-205 is closely related to the occurrence, development, and prognosis of lung cancer and breast cancer. However, studies show that it plays opposite roles in different tumor types. Because the expression and regulation of miR-205 are primarily confined to epigenetic areas, whether genetic variation of miR-205 is related to the occurrence or to the development of tumors has not been reported. The aim of this study was to screen genetic variation of miR-205 gene and to investigate its association with the risk and development of lung and breast cancer...
November 25, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27882172/downregulated-mir-486-5p-acts-as-a-tumor-suppressor-in-esophageal-squamous-cell-carcinoma
#9
Yunfeng Yi, Xiujuan Lu, Jianming Chen, Changjie Jiao, Jing Zhong, Zhiming Song, Xiaoping Yu, Baoli Lin
microRNAs (miRNAs/miRs) are crucial regulators of gene expression at the post-translational level through promoting mRNA degradation or the repression of translation of target genes. miRs have been confirmed to serve a dominant role in tumor biology. miR-486-5p has been ascertained to be involved in non-small-cell lung cancer, breast cancer and hepatocellular carcinoma; however, the expression and function of miR-486-5p in esophageal squamous cell carcinoma (ESCC) has yet to be elucidated. The present study aimed to analyze the expression levels of miR-486-5p in ESCC tissues and paired normal adjacent tissues, and determine the effects of miR-486-5p on esophageal cancer cells using MTT, wound scratch and apoptosis assays...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27857177/mir-96-promotes-cell-proliferation-migration-and-invasion-by-targeting-ptpn9-in-breast-cancer
#10
Yeting Hong, Hongwei Liang, Uzair-Ur-Rehman, Yanbo Wang, Weijie Zhang, Yong Zhou, Song'an Chen, Mengchao Yu, Sufang Cui, Minghui Liu, Nan Wang, Chao Ye, Chihao Zhao, Yanqing Liu, Qian Fan, Chen-Yu Zhang, Jianfeng Sang, Ke Zen, Xi Chen
microRNAs (miRNAs) have emerged as major regulators of the initiation and progression of human cancers, including breast cancer. The aim of this study is to determine the expression pattern of miR-96 in breast cancer and to investigate its biological role during tumorigenesis. We showed that miR-96 was significantly upregulated in breast cancer. We then investigated its function and found that miR-96 significantly promoted cell proliferation, migration and invasion in vitro and enhanced tumor growth in vivo...
November 18, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27855392/the-emerging-roles-of-long-noncoding-rna-ror-lincrna-ror-and-its-possible-mechanisms-in-human-cancers
#11
Yan Pan, Chen Li, Jing Chen, Kai Zhang, Xiaoyuan Chu, Rui Wang, Longbang Chen
To date, there is only up to 2% of protein-coding genes that are stably transcribed, whereas the vast majority are non-coding RNAs (ncRNAs). These ncRNAs, also known as non-messenger RNAs (nmRNAs) or functional RNAs (fRNAs), include transfer RNAs, ribosomal RNAs, microRNAs and long non-coding RNAs (lncRNAs). With the advance of high-resolution microarrays and massively parallel sequencing technology, lncRNAs have gained extended attentions nowadays and are found to play important roles in tumorigenesis and progression of human cancers...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27853906/downregulation-of-estrogen-receptor-and-modulation-of-growth-of-breast-cancer-cell-lines-mediated-by-paracrine-stromal-cell-signals
#12
J Huang, P Woods, D Normolle, J P Goff, P V Benos, C J Stehle, R A Steinman
PURPOSE: Breast cancers have a poorer prognosis if estrogen receptor expression was lost during recurrence. It is unclear whether this conversion is cell autonomous or whether it can be promoted by the microenvironment during cancer dormancy. We explored the ability of marrow-derived stromal cell lines to arrest co-cultured breast cancer cells and suppress estrogen receptor alpha (ER) expression during arrest, facilitating the emergence of estrogen-independent breast cancer clones. METHODS: Cancer cell growth, ER protein, microRNA, and mRNA levels were measured in breast cancer cell lines exposed to conditioned medium from marrow stromal lines in the presence and absence of estrogen and of signaling pathway modulators...
November 16, 2016: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/27842510/mir-124-3p-functions-as-a-tumor-suppressor-in-breast-cancer-by-targeting-cbl
#13
Yanbo Wang, Luxiao Chen, Zhenyu Wu, Minghai Wang, Fangfang Jin, Nan Wang, Xiuting Hu, Zhengya Liu, Chen-Yu Zhang, Ke Zen, Jiangning Chen, Hongwei Liang, Yujing Zhang, Xi Chen
BACKGROUND: The origin and development of breast cancer remain complex and obscure. Recently, microRNA (miRNA) has been identified as an important regulator of the initiation and progression of breast cancer, and some studies have shown the essential role of miR-124-3p as a tumor suppressor in breast tumorigenesis. However, the detailed role of miR-124-3p in breast cancer remains poorly understood. METHODS: Quantitative RT-PCR and western blotting assays were used to measure miR-124-3p and CBL expression levels in breast cancer tissues, respectively...
November 15, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27836600/a-novel-method-for-sensitive-microrna-detection-electropolymerization-based-doping
#14
Merve Kaplan, Tugba Kilic, Gunnur Guler, Jihane Mandli, Aziz Amine, Mehmet Ozsoz
In the proposed study, for the first time, sensitive electrochemical detection of a breast cancer biomarker microRNA (miRNA), mir-21 was achieved via electropolymerized polypyrrole (PPy) modified pencil graphite electrodes (PPy/PGE). The detection of hybridization of electrochemically doped probe miRNA, antimir-21, with its complementary target, mir-21 was monitored by either electrochemical impedance spectroscopy (EIS) via comparison of charge transfer resistance (Rct) values before and after hybridization or by electrochemical reduction signal of an hybridization indicator, Meldola's blue (MDB)...
September 14, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27831559/decreased-expression-of-microrna-17-and-microrna-20b-promotes-breast-cancer-resistance-to-taxol-therapy-by-upregulation-of-ncoa3
#15
Xiang Ao, Peipei Nie, Baoyan Wu, Wei Xu, Tao Zhang, Songmao Wang, Haocai Chang, Zhengzhi Zou
Chemoresistance is a major obstacle to effective breast cancer chemotherapy. However, the underlying molecular mechanisms remain unclear. In this study, nuclear receptor coactivator 3 (NCOA3) was found to be significantly increased in taxol-resistant breast cancer tissues and cells. Moreover, overexpression of NCOA3 enhanced breast cancer cell resistance to taxol, whereas depletion of NCOA3 decreased taxol resistance. Subsequently, we investigated whether NCOA3 expression was regulated by miRNAs in breast cancer...
November 10, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27829043/microrna-93-promotes-epithelial-mesenchymal-transition-of-endometrial-carcinoma-cells
#16
Shuo Chen, Xi Chen, Kai-Xuan Sun, Yin-Ling Xiu, Bo-Liang Liu, Miao-Xiao Feng, Xiu-Bo Sang, Yang Zhao
MicroRNA-93, derived from a paralog (miR-106b-25) of the miR-17-92 cluster, is involved in the tumorigenesis and progression of many cancers such as breast, colorectal, hepatocellular, lung, ovarian, and pancreatic cancer. However, the role of miR-93 in endometrial carcinoma and the potential molecular mechanisms involved remain unknown. Our results showed that miR-93 was overexpressed in endometrial carcinoma tissues than normal endometrial tissues. The endometrial carcinoma cell lines HEC-1B and Ishikawa were transfected with miR-93-5P, after which cell migration and invasion ability and the expression of relevant molecules were detected...
2016: PloS One
https://www.readbyqxmd.com/read/27825093/microrna-155-regulates-cell-survival-growth-and-chemosensitivity-by-targeting-foxo3a-in-breast-cancer
#17
William Kong, Lili He, Marc Coppola, Jianping Guo, Nicole N Esposito, Domenico Coppola, Jin Q Cheng
No abstract text is available yet for this article.
October 21, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27822413/mir-106b-mediated-mfn2-suppression-is-critical-for-pkm2-induced-mitochondrial-fusion
#18
Haili Wu, Zhuoyu Li, Yingying Wang, Peng Yang, Zongrui Li, Hanqing Li, Changxin Wu
Cancer cells preferentially metabolize glucose through aerobic glycolysis. This phenomenon, known as the Warburg effect, is a characteristic of glucose metabolism in cancer cells. PKM2 is reported to imply an important role in glycolysis. However, whether and how PKM2 can cause mitochondrial dysfunction, then subsequently forcing cancer cells using glycolysis instead of oxidation phosphorylation is poorly understood. Here we reported that overexpression of PKM2 disrupted mitochondrial dynamics by enhancing fusion...
2016: American Journal of Cancer Research
https://www.readbyqxmd.com/read/27822407/exosomes-mediate-micrornas-transfer-in-breast-cancer-chemoresistance-regulation
#19
REVIEW
Juliana Carvalho Santos, Marcelo Lima Ribeiro, Luis Otávio Sarian, Manoela Marques Ortega, Sophie Françoise Derchain
Breast cancer is the most common and fatal type of cancer in women worldwide due to the metastatic process and resistance to treatment. Despite advances in molecular knowledge, little is known regarding resistance to chemotherapy. One highlighted aspect is the DNA damage response (DDR) pathway that is activated upon genotoxic damage, controlling the cell cycle arrest or DNA repair activation. Recently, studies have showed that cancer stem cells (CSCs) could promote chemoresistance through DDR pathway. Furthermore, it is known that the epithelial-mesenchymal transition (EMT) can generate cells with CSCs characteristics and therefore regulate the chemoresistance process...
2016: American Journal of Cancer Research
https://www.readbyqxmd.com/read/27815936/microrna-124-enhances-response-to-radiotherapy-in-human-epidermal-growth-factor-receptor-2-positive-breast-cancer-cells-by-targeting-signal-transducer-and-activator-of-transcription-3
#20
Ying Fu, Jianping Xiong
AIM: To determine whether microRNA (miR)-124 enhances the response to radiotherapy in human epidermal growth factor receptor 2 (HER2)-positive breast cancer cells by targeting signal transducer and activator of transcription 3 (Stat3). METHODS: miR-29b expression was measured in 80 pairs of breast tumor samples and adjacent normal tissues collected between January 2013 and July 2014. Activity changes of 50 canonical signaling pathways upon miR-124 overexpression were determined using Cignal Signal Transduction Reporter Array...
October 31, 2016: Croatian Medical Journal
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