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https://www.readbyqxmd.com/read/27927008/microrna-296-5p-promotes-invasiveness-through-downregulation-of-nerve-growth-factor-receptor-and-caspase-8
#1
Hong Lee, Chang Hoon Shin, Hye Ree Kim, Kyung Hee Choi, Hyeon Ho Kim
Glioblastomas (GBM) are very difficult to treat and their aggressiveness is one of the main reasons for this as well as for the frequent recurrences. MicroRNAs posttranscriptionally regulate their target genes through interaction between their seed sequence and 3'UTR of the target mRNAs. We previously reported that miR-296-3p is regulated by neurofibromatosis 2 (NF2) and enhances the invasiveness of GBM cells via SOCS2/STAT3. In this study, we investigated whether miR-296-5p, which originates from the same precursor miRNA as miR-296-3p, can increase the invasiveness of GBM cells...
December 8, 2016: Molecules and Cells
https://www.readbyqxmd.com/read/27926533/andrographolide-impedes-cancer-stemness-and-enhances-radio-sensitivity-in-oral-carcinomas-via-mir-218-activation
#2
Po-Yu Yang, Pei-Ling Hsieh, Tong Hong Wang, Cheng-Chia Yu, Ming-Yi Lu, Yi-Wen Liao, Tzu-Hsin Lee, Chih-Yu Peng
Current evidence suggests that oral cancer stem cells (OCSCs) possess high tumorigenic and metastatic properties as well as chemo- and radioresistance. In this study, we demonstrated that andrographolide, the main bioactive component in the medicinal plant Andrographis, significantly reduced oncogenicity and restored radio-sensitivity of ALDH1+CD44+ OCSCs. Mechanistic studies showed that andrographolide treatment increased the expression of microRNA-218 (miR-218), leading to the downregulation of Bmi1. We showed that knockdown of miR-218 in ALDH1-CD44- non-OCSCs enhanced cancer stemness, while silencing of Bmi1 significantly counteracted it...
December 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926529/altered-microrna-profiles-in-plasma-exosomes-from-mesial-temporal-lobe-epilepsy-with-hippocampal-sclerosis
#3
Shaofeng Yan, Hua Zhang, Wenyan Xie, Fangang Meng, Kai Zhang, Yin Jiang, Xin Zhang, Jianguo Zhang
Mesial temporal lobe epilepsy with hippocampal sclerosis (mTLE-HS) is the most common type of focal epilepsy. The present study aimed to explore the expression and functions of exosomal microRNAs in mTLE-HS. A total of 50 microRNAs were found to be differentially expressed in mTLE-HS compared with healthy controls. Among them, 2 were increased and 48 were decreased. The 6 significant differentially expressed candidate microRNAs (miR-3613-5p, miR-4668-5p, miR-8071, miR-197-5p, miR-4322, and miR-6781-5p ) in exosome were validated...
December 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926519/diagnostic-and-prognostic-value-of-mir-106a-in-colorectal-cancer
#4
Haibin Hao, Laipeng Liu, Dong Zhang, Chao Wang, Guangfeng Xia, Fuping Zhong, Xiaoyun Hu
We sought to systematically evaluate the diagnostic and prognostic value miR106a in patients with colorectal cancer (CRC). An original study was conducted to explore correlations between tissue miR106a levels and outcomes for 138 patients diagnosed with CRC. To explore the diagnostic performance of miR106a, eligible studies were identified from medical databases from China and abroad. Based on these results, 15 studies (including our original study) were pooled and included in a meta-analyses. The pooled sensitivity, specificity, and diagnostic odds ratios of miR106a were 0...
December 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926508/microrna-497-inhibits-thyroid-cancer-tumor-growth-and-invasion-by-suppressing-bdnf
#5
Peisong Wang, Xianying Meng, Yan Huang, Zhi Lv, Jia Liu, Guimin Wang, Wei Meng, Shuai Xue, Qiang Zhang, Pengju Zhang, Guang Chen
miR-497 reportedly plays critical roles in tumor development and progression in many types of cancers. We therefore investigated the function and underlying mechanism of miR-497 in thyroid cancer. We found that miR-497 is downregulated in thyroid cancer tissues, and that miR-497 levels are negatively correlated with advanced clinical stage and lymph node metastasis. Overexpressed miR-497 suppressed thyroid cancer cell proliferation, colony formation, migration, and invasion in vitro, and inhibited tumorigenesis in vivo...
December 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926502/mir-433-3p-suppresses-cell-growth-and-enhances-chemosensitivity-by-targeting-creb-in-human-glioma
#6
Shupeng Sun, Xiuyu Wang, Xinnv Xu, Hui Di, Jixiang Du, Bin Xu, Qiong Wang, Jinhuan Wang
Previous studies reported that miR-433 exerts function widely in human tumorigenesis and development. Here, we further investigate the potential role of miR-433 in glioma. Quantitative real-time PCR demonstrated that miR-433-3p and miR-433-5p were low expressed in glioma tissues and cell lines. Functional studies suggested that the overexpression of miR-433-3p suppressed proliferation, induced apoptosis and inhibited invasion and migration of human glioma cells. But the growth and metastasis of glioma cells were not significantly influenced by overexpression of miR-433-5p...
December 3, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926494/p38-and-jnk-pathways-control-e-selectin-dependent-extravasation-of-colon-cancer-cells-by-modulating-mir-31-transcription
#7
Liang Zhong, Bryan Simoneau, Jacques Huot, Martin J Simard
Extravasation of circulating cancer cells is a key event of metastatic dissemination that is initiated by the adhesion of cancer cells to vascular endothelial cells. It requires the interaction between adhesion receptors such as E-selectin present on endothelial cells and their ligands on cancer cells. Notably, E-selectin influences the metastatic potential of breast, bladder, gastric, pancreatic, and colorectal carcinoma as well as of leukemia and lymphoma. Here, we show that E-selectin expression induced by the pro-inflammatory cytokine IL-1β is directly and negatively regulated by miR-31...
December 2, 2016: Oncotarget
https://www.readbyqxmd.com/read/27925034/formulation-and-in-vitro-evaluation-of-carbopol-934-based-modified-clotrimazole-gel-for-topical-application
#8
Muhammad Ubaid, Sadaf Ilyas, Sadullah Mir, Abida K Khan, Rehana Rashid, Muhammad Z U Khan, Zainab G Kanwal, Ahmad Nawaz, Amna Shah, Ghulam Murtaza
The aim of present study was to enhance topical permeation of clotrimazole gel preparation by using various permeability enhancers such as coconut oil, pistachio oil and sodium lauryl sulphate (SLS). Clotrimazole gel preparations were prepared and optimized by using three factor, five level central composite design. A second-order polynomial equation was generated in order to estimate the effect of independent variables i.e. coconut oil (X1), pistachio oil (X2) and sodium lauryl sulphate (X3) at various dependent variables i...
December 1, 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27924974/mir-155-regulates-high-glucose-induced-cardiac-fibrosis-via-the-tgf-%C3%AE-signaling-pathway
#9
Dong Zhang, Yongchun Cui, Bin Li, Xiaokang Luo, Bo Li, Yue Tang
Cardiac fibrosis, as a pathological process, plays an important role in various cardiac diseases. microRNA-155 (miR-155) is one of the most important miRNAs, and previous studies have shown that it is a regulatory factor in various fibrotic diseases. However, the mechanism by which miR-155 affects myocardial fibrosis remains unclear. In this study, we aim to establish the biological function of miR-155 in myocardial fibrosis induced by diabetes in mice. We used normal C57BL/6 wild type (WT) and miR-155 knockout (KO) mice to establish the diabetic model by intraperitoneal injection of streptozotocin, and we utilized echocardiography to evaluate the cardiac function at 30 and 60 days post-modeling...
December 7, 2016: Molecular BioSystems
https://www.readbyqxmd.com/read/27924862/mesenchymal-stem-cell-transplantation-can-restore-lupus-disease-associated-mirna-expression-and-th1-th2-ratios-in-a-murine-model-of-sle
#10
Eun Wha Choi, MinJae Lee, Ji Woo Song, Il Seob Shin, Sung Joo Kim
C3.MRL-Fas(lpr)/J mice spontaneously develop high titers of anti-dsDNA, mild glomerular nephritis, and severe lymphoproliferation symptoms. This study aimed to compare the effects of long-term serial administration of human adipose tissue-derived mesenchymal stem cells (ASCs), and cyclophosphamide treatment in C3.MRL-Fas(lpr)/J mice using a murine SLE model. C3.MRL-Fas(lpr)/J mice were divided into saline (C), cyclophosphamide (Y), and ASC (H) treatment groups. Background-matched control C3H mice treated with saline (N) were also compared...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924640/the-association-of-circulating-mir-30a-mir-29-and-mir-133-with-white-coat-hypertension
#11
Yu-Qing Huang, Cheng Huang, Ji-Yan Chen, Jie Li, Ying-Qing Feng
AIM: The aim of the present study was to investigate the association of circulating miRNAs with white-coat hypertension (WCH) and further analyze whether miRNAs could be as potential biomarkers for WCH. METHOD: Quantitative reverse transcriptase PCR (qRT-PCR) was used to evaluate the expression of selected miRNAs. The area under the receiver-operating characteristic curve was used to evaluate diagnostic accuracy. RESULTS: MiR-30a yielded an AUC of 0...
December 7, 2016: Biomarkers in Medicine
https://www.readbyqxmd.com/read/27924503/mir-206-inhibits-renal-cell-cancer-growth-by-targeting-gak
#12
Chao Wei, Shen Wang, Zhang-Qun Ye, Zhi-Qiang Chen
Renal cell cancer (RCC) remains one of the most lethal types of cancer in adults. MicroRNAs (miRNAs) play key roles in the pathogenesis of RCC. The role of miR-206 in RCC has not been fully understood. The purpose of this study was to examine the role of miR-206 in the regulation of proliferation and metastasis of RCC and the possible mechanism. miR-206 expression was detected by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) in RCC cell lines (786-O and OS-RC-2 cells) and clinical samples...
December 2016: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/27924500/mir-124-modulates-gefitinib-resistance-through-snai2-and-stat3-in-non-small-cell-lung-cancer
#13
Fa-Yong Hu, Xiao-Nian Cao, Qin-Zi Xu, Yu Deng, Sen-Yan Lai, Jing Ma, Jun-Bo Hu
Gefitinib is used as a first-line treatment for advanced non-small cell lung cancer (NSCLC). Unfortunately, most NSCLC patients inevitably develop gefitinib resistance during treatment. In addition to EGFR mutation status, the mechanisms involved are largely unknown. In this study, we showed that miR-124, a tumor suppressor, was significantly down-regulated in gefitinib-resistant NSCLC patients and cell lines compared with gefitinib-sensitive patients and cell lines. In addition, the miR-124 depletion induced gefitinib resistance, and miR-124 overexpression sensitized gefitinib-resistant cells to gefitinib...
December 2016: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/27924487/antagonists-of-the-mirna-argonaute-2-protein-complex-anti-mir-agos
#14
Marco F Schmidt, Oliver Korb, Chris Abell
microRNAs (miRNAs) have been identified as high-value drug targets. A widely applied strategy in miRNA inhibition is the use of antisense agents. However, it has been shown that oligonucleotides are poorly cell permeable because of their complex chemical structure and due to their negatively charged backbone. Consequently, the general application of oligonucleotides in therapy is limited. Since miRNAs' functions are executed exclusively by the Argonaute 2 protein, we therefore describe a protocol for the design of a novel miRNA inhibitor class: antagonists of the miRNA-Argonaute 2 protein complex, so-called anti-miR-AGOs, that not only block the crucial binding site of the target miRNA but also bind to the protein's active site...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27924483/rapid-generation-of-mirna-inhibitor-leads-by-bioinformatics-and-efficient-high-throughput-screening-methods
#15
Christopher L Haga, Sai Pradeep Velagapudi, Jessica L Childs-Disney, Jacqueline Strivelli, Matthew D Disney, Donald G Phinney
The discovery of microRNAs (miRNAs) has opened an entire new avenue for drug development. These short (15-22 nucleotides) noncoding RNAs, which function in RNA silencing and posttranscriptional regulation of gene expression, have been shown to critically affect numerous pathways in both development and disease progression. Current miRNA drug development focuses on either reintroducing the miRNA into cells through the use of a miRNA mimic or inhibiting its function via use of a synthetic antagomir. Although these methods have shown some success as therapeutics, they face challenges particularly with regard to cellular uptake and for use as systemic reagents...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27924478/evaluating-synergistic-effects-of-mir-34a-mimics-in-combination-with-other-therapeutic-agents-in-cultured-non-small-cell-lung-cancer-cells
#16
Jane Zhao, Andreas G Bader
Tumor suppressor miRNAs such as miR-34a inhibit tumor growth by simultaneously regulating the expression of multiple important oncogenes across multiple oncogenic pathways and, therefore, provide a strong rationale for developing therapeutic miRNA mimics in combination with other therapeutic cancer agents to augment drug sensitivity. Here, we describe the experimental approach for evaluating miRNA and drug combinations using the "fixed ratio" method in cultured non-small cell lung cancer cells.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27924477/assessing-anti-mir-pharmacology-with-mirna-polysome-shift-assay
#17
John R Androsavich
Target engagement measurements are critical for evaluating developmental drug candidates and their pharmacological activity. microRNA (miRNA) Polysome Shift Assay enables measurement of anti-miR drug target engagement (i.e. extent of miRNA inhibition) without the need to pre-identify or pre-validate downstream miRNA-regulated genes. This makes it useful for assessing anti-miR activity in target tissues or cells where biology of the inhibited miRNAs may not be well understood. In addition, miRNA Polysome Shift Assay can be multiplexed to assess inhibition of multiple miRNAs by a single anti-miR, thus guiding drug optimization for enhancing or avoiding these activities as desired...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27924476/competitive-argonaute-based-rna-immunoprecipitation-for-investigation-of-transcriptomic-response-to-anti-mir
#18
John R Androsavich
Identification and validation of microRNA (miRNA) target genes is essential for gaining a better understanding of the many different functions miRNAs have in healthy and diseased cells. From a practical standpoint, validated target genes are also useful for monitoring pharmacological activity of developmental therapeutics that modulate miRNAs, such as anti-miRNA oligonucleotides (anti-miR). Here, we describe a method that uses changes in Argonaute 2-RNA immunoprecipitation in response to competition by anti-miR, titrated ex vivo, as physical evidence for target validation...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27924475/determination-of-anti-mir-association-with-mirna-argonaute-complexes-in-vivo
#19
Dimitrios G Zisoulis
Aberrant expression of microRNAs (miRNAs) has been causatively linked to multiple disease pathologies while pharmacological inhibition of overexpressed miRNAs by modified oligonucleotides, termed anti-miRs, has been shown to ameliorate the disease phenotype. Anti-miRs are also widely used in academia to define miRNA-mediated regulation of gene networks in vitro and in vivo. Here, we describe a methodology that allows the determination of the physical association of miRNA inhibitors and their targets in the context of the Argonaute complex in vivo, providing unprecedented insight into the physiological interactions of anti-miRs and the miRNA machinery...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27924474/quantification-of-oligonucleotide-association-with-mirna-argonaute-complexes-in-vitro
#20
Dimitrios G Zisoulis
A major challenge in the development of oligonucleotide-based microRNA (miRNA) inhibitors for therapeutic applications is the identification of candidate designs with strong affinity for the target miRNA in the context of the Argonaute complex. To this effect, distinct chemical modifications are employed along the length of the oligonucleotide aimed at strengthening the interactions with the target miRNA. However, the modification chemistry and placement can inadvertently affect the intrinsic ability of the oligonucleotide to pair with its target in the context of Argonaute...
2017: Methods in Molecular Biology
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