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miR-181a

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https://www.readbyqxmd.com/read/28435518/sparc-overexpression-alters-microrna-expression-profiles-involved-in-tumor-progression
#1
Bhavesh K Ahir, Nasya M Elias, Sajani S Lakka
Medulloblastoma is the most common malignant brain tumor in children. SPARC (secreted protein acidic and rich in cysteine), a multicellular non-structural glycoprotein is known to be involved in multiple processes in various cancers. Previously, we reported that SPARC expression significantly impairs medulloblastoma tumor growth in vitro and in vivo and also alters chemo sensitivity. MicroRNAs are a class of post-transcriptional gene regulators with critical functions in tumor progression. In addition, microRNA (miRNA) expression changes are also involved in chemo-resistance...
January 2017: Genes & Cancer
https://www.readbyqxmd.com/read/28404930/microrna-regulation-of-progesterone-receptor-in-breast-cancer
#2
Avital Gilam, Ayelet Shai, Itamar Ashkenazi, Liat Appel Sarid, Assi Drobot, Amitai Bickel, Noam Shomron
Hormone receptor status is of significant value when deciding on anti-estrogenic adjuvant therapy for breast cancer tumors. However, while estrogen receptor (ER) regulation was intensively studied, the regulation of progesterone receptor (PR) levels has not been extensively investigated. MicroRNAs (miRNAs, miRs) are post-transcriptional negative regulators of gene expression involved in diverse cellular processes. The aim of this study was to identify miRNAs that regulate PR in breast cancer.We mapped potential miRNA binding sites for miR-181a, miR-23a and miR-26b on PR mRNA and demonstrated a direct regulation of PR by these three miRNAs by in-vitro Luciferase binding assays...
February 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28392786/expression-of-serum-micrornas-is-altered-during-acute-graft-versus-host-disease
#3
Rachel E Crossland, Jean Norden, Mateja Kralj Juric, Kile Green, Kim F Pearce, Clare Lendrem, Hildegard T Greinix, Anne M Dickinson
Acute graft-versus-host disease (aGvHD) is the most frequent and serious complication following hematopoietic stem cell transplantation (HSCT), with a high mortality rate. A clearer understanding of the molecular pathogenesis may allow for improved therapeutic options or guide personalized prophylactic protocols. Circulating microRNAs are expressed in body fluids and have recently been associated with the etiology of aGvHD, but global expression profiling in a HSCT setting is lacking. This study profiled expression of n = 799 mature microRNAs in patient serum, using the NanoString platform, to identify microRNAs that showed altered expression at aGvHD diagnosis...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28389242/upregulation-of-mir-181a-suppresses-the-formation-of-glioblastoma-stem-cells-by-targeting-the-notch2-oncogene-and-correlates-with-good-prognosis-in-patients-with-glioblastoma-multiforme
#4
Shi-Xiong Huang, Zhong-Yan Zhao, Guo-Hu Weng, Xiang-Ying He, Chan-Ji Wu, Chuan-Yi Fu, Zhi-Yan Sui, Yu-Shui Ma, Tao Liu
Glioblastoma stem-like cells (GSCs) are responsible for the initiation and progression of glioblastoma multiforme (GBM), and microRNAs (miRNAs) play an important role in this disease. However, the mechanisms underlying the role of miRNAs in the stemness of GSCs have not been completely elucidated. We previously showed that miR-181a is downregulated in GBM and may predict prognosis in patients with this disease. Here, we demonstrate that the upregulation of miR-181a suppressed GSC formation and inhibited GBM tumorigenesis by targeting the Notch2 oncogene...
May 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28388883/long-non-coding-rna-xist-regulates-pten-expression-by-sponging-mir-181a-and-promotes-hepatocellular-carcinoma-progression
#5
Shuzhen Chang, Binhe Chen, Xiaoyan Wang, Keqin Wu, Yuqiu Sun
BACKGROUND: Tumor metastasis often occurs in hepatocellular carcinoma (HCC) and influences the patient's prognosis, and microRNAs are reported to play key roles in tumor metastasis. This study was conducted to explore the effect of microRNAs on HCC metastasis. METHODS: The levels of miR-181a in HCC tissues, adjacent tissues, metastatic HCC tissues, and non-metastatic HCC tissues at different stages were determined by qRT-PCR. Effect of miR-181a on the proliferation, invasion, and metastasis of HCC cells was estimated by cell counting kits-8 (CCK-8), wound-healing, and Transwell assays...
April 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28365714/microrna-181a-regulates-apoptosis-and-autophagy-process-in-parkinson-s-disease-by-inhibiting-p38-mitogen-activated-protein-kinase-mapk-c-jun-n-terminal-kinases-jnk-signaling-pathways
#6
Ying Liu, Yanfeng Song, Xiaotun Zhu
BACKGROUND microRNA (miR)-181a has been reported to be downregulated in Parkinson's disease (PD), but the regulatory mechanism of miR-181a on neuron apoptosis and autophagy is still poorly understood. We aimed to investigate the neuroprotective effects of miR-181a on PD in vitro. MATERIAL AND METHODS Human SK-N-SH neuroblastoma cells were incubated with different concentrations of 1-methyl-4-phenylpyridinium ion (MPP+) to induce the PD model. The expression of miR-181a was then analyzed. After transfection with miR-181a mimic or scramble following MPP+ treatment, the expression of autophagy protein markers (LC3II, LC3I, and Beclin 1) and p38 mitogen-activated protein kinase (MAPK)/c-Jun N-terminal kinases (JNK) signaling proteins (p-p38, p38, p-JNK, and JNK) and cell apoptosis were detected...
April 2, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28358263/lncrna-ccat1-modulates-the-sensitivity-of-paclitaxel-in-nasopharynx-cancers-cells-via-mir-181a-cpeb2-axis
#7
Qiaosu Wang, Wenjing Zhang, Shaojuan Hao
Recent studies reported that long non-coding RNA (lncRNA) might play critical roles in regulating chemo-resistant of multiple types of cancer. This study aimed to investigate whether long non-coding RNA CCAT1 was involved in Paclitaxel resistance in nasopharyngeal carcinoma (NPC). qRT-PCR was used for testing the expression of CCAT1, miR-181a and CPEB2 in tumor tissues and NPC cancers. NPC cells were transfected with siRNAs to suppress the mRNA level of CCAT1 in NPC cells. MTT assays and flow cytometry analysis were used to assess the sensitivity of paclitaxel in NPC cells...
April 18, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28326190/malat1-regulates-myogenic-differentiation-and-muscle-regeneration-through-modulating-myod-transcriptional-activity
#8
Xiaona Chen, Liangqiang He, Yu Zhao, Yuying Li, Suyang Zhang, Kun Sun, Karl So, Fengyuan Chen, Liang Zhou, Leina Lu, Lijun Wang, Xihua Zhu, Xichen Bao, Miguel A Esteban, Shinichi Nakagawa, Kannanganattu V Prasanth, Zhenguo Wu, Hao Sun, Huating Wang
Malat1 is one of the most abundant long non-coding RNAs in various cell types; its exact cellular function is still a matter of intense investigation. In this study we characterized the function of Malat1 in skeletal muscle cells and muscle regeneration. Utilizing both in vitro and in vivo assays, we demonstrate that Malat1 has a role in regulating gene expression during myogenic differentiation of myoblast cells. Specifically, we found that knockdown of Malat1 accelerates the myogenic differentiation in cultured cells...
2017: Cell Discovery
https://www.readbyqxmd.com/read/28322462/stat1-inhibits-mir-181a-expression-to-suppress-colorectal-cancer-cell-proliferation-through-pten-akt
#9
Xingwen Zhang, Xiang Li, Fengbo Tan, Nanhui Yu, Haiping Pei
Signal transducers and activators of transcription 1 (STAT1) exhibits tumor-suppressor properties by inhibiting oncogenic pathways and promoting tumor immunosurveillance. MicroRNAs, a group of non-coding endogenous ones, may regulate gene expression and plays specific roles in tumorigenesis. Recently, miR-181a has been reported to be associated with poor prognosis of colorectal cancer (CRC). Using human colorectal cancer cell lines, we demonstrated that STAT1 suppresses both LoVo and SW480 cell growth by down-regulating miR-181a...
March 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28315020/novel-biomarkers-for-non-functioning-invasive-pituitary-adenomas-were-identified-by-using-analysis-of-micrornas-expression-profile
#10
Silin Wu, Ye Gu, Yuying Huang, Tyh-Chai Wong, Hailin Ding, Tengfei Liu, Yu Zhang, Xiaobiao Zhang
The microRNAs (miRNAs) are involved in multiple pathological processes among various types of tumors. However, the functions of miRNAs in benign brain tumors are largely unexplored. In order to explore the pathogenesis of the invasiveness in non-functional pituitary adenoma (NFPA), the miRNAs expression profile was analyzed between invasive and non-invasive non-functional pituitary adenoma by miRNAs microarray. Six most significant differentially expressed miRNAs were identified including four upregulated miRNAs hsa-miR-181b-5p, hsa-miR-181d, hsa-miR-191-3p, and hsa-miR-598 and two downregulated miRNAs hsa-miR-3676-5p and hsa-miR-383...
March 17, 2017: Biochemical Genetics
https://www.readbyqxmd.com/read/28301325/circulating-mirnas-as-biomarkers-of-gait-speed-responses-to-aerobic-exercise-training-in-obese-older-adults
#11
Tan Zhang, Tina E Brinkley, Keqin Liu, Xin Feng, Anthony P Marsh, Stephen Kritchevsky, Xiaobo Zhou, Barbara J Nicklas
Gait speed is a useful predictor of adverse outcomes, including incident mobility disability and mortality in older adults. While aerobic exercise training (AEX) is generally an effective therapy to improve gait speed, individual responses are highly variable. Circulating microRNAs (miRNAs) may contribute to inter-individual changes in gait speed with AEX. We examined whether plasma miRNAs are associated with gait speed changes (dGaitSp) in 33 obese older adults (age: 69.3±3.6 years, BMI: 34.0±3.1 kg/m(2), 85% white, 73% women) who performed treadmill walking, 4 days/week for 5 months...
March 15, 2017: Aging
https://www.readbyqxmd.com/read/28288641/sox2-regulates-multiple-malignant-processes-of-breast-cancer-development-through-the-sox2-mir-181a-5p-mir-30e-5p-tusc3-axis
#12
Kuancan Liu, Fuan Xie, Anding Gao, Rui Zhang, Long Zhang, Zhangwu Xiao, Qiong Hu, Weifeng Huang, Qiaojia Huang, Baoshun Lin, Jian Zhu, Haikun Wang, Jianwen Que, Xiaopeng Lan
BACKGROUND: High levels of SOX2 protein are correlated with increased dissemination of breast cancer. However, the underlying molecular mechanisms are not fully understood. METHODS: In this study we investigate the role of SOX2 in breast cancer metastasis using multiple in vitro and in vivo assays including cell culture, shRNA-mediated knockdown, wound healing, colony formation, transwell chamber, xenograft and tail vein injection. Moreover, western blot, immunostaining, microarray and real-time PCR were used to determine the change of protein and miRNA levels...
March 14, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28280258/mir-181a-modulates-chondrocyte-apoptosis-by-targeting-glycerol-3-phosphate-dehydrogenase-1-like-protein-gpd1l-in-osteoarthritis
#13
Xicheng Zhai, Ru Meng, Hongbiao Li, Jie Li, Lei Jing, Lei Qin, Yulei Gao
BACKGROUND miR-181a is a small non-coding RNA known to be dysregulated in osteoarthritis (OA), but the role of miR-181a in human OA remains unclear. The aim of this study was to identify its function and molecular target in chondrocytes during OA pathogenesis. MATERIAL AND METHODS The function of miR-181a was assessed by gain-of-function studies in human OA chondrocytes. Potential targets of miR-181a were predicted using series of bioinformatics and intersection analysis, then confirmed by luciferase reporter assay...
March 10, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28275578/micrornas-for-the-prediction-of-early-response-to-sorafenib-treatment-in-human-hepatocellular-carcinoma
#14
Naoshi Nishida, Tadaaki Arizumi, Satoru Hagiwara, Hiroshi Ida, Toshiharu Sakurai, Masatoshi Kudo
BACKGROUND: Several studies suggest the role of circulating microRNAs (miRNAs) as biomarkers of hepatocellular carcinoma (HCC). However, the serum miRNA profile associated with the response to sorafenib remains to be elucidated. The aim of this study was to clarify the specific miRNAs in serum that could predict the early response of HCC to sorafenib treatment. SUMMARY: Analyzing the sera from 16 HCC patients, we selected five miRNAs that showed differences in serum levels between patients with and without tumor responses among 179 known secretory miRNAs by using locked nucleic acid probe-based quantitative PCR...
February 2017: Liver Cancer
https://www.readbyqxmd.com/read/28265775/altered-microrna-expression-patterns-during-the-initiation-and-promotion-stages-of-neonatal-diethylstilbestrol-induced-dysplasia-neoplasia-in-the-hamster-mesocricetus-auratus-uterus
#15
Ramesh Padmanabhan, Isabel R Hendry, Jennifer R Knapp, Bin Shuai, William J Hendry
Treatment of Syrian hamsters on the day of birth with the prototypical endocrine disruptor and synthetic estrogen, diethylstilbestrol (DES), leads to 100% occurrence of uterine hyperplasia/dysplasia in adulthood, a large proportion of which progress to neoplasia (endometrial adenocarcinoma). Consistent with our prior gene expression analyses at the mRNA and protein levels, we now report (based on microarray, real-time polymerase chain reaction, and in situ hybridization analyses) that progression of the neonatal DES-induced dysplasia/neoplasia phenomenon in the hamster uterus also includes a spectrum of microRNA expression alterations (at both the whole-organ and cell-specific level) that differ during the initiation (upregulated miR-21, 200a, 200b, 200c, 29a, 29b, 429, 141; downregulated miR-181a) and promotion (downregulated miR-133a) stages of the phenomenon...
March 6, 2017: Cell Biology and Toxicology
https://www.readbyqxmd.com/read/28251236/distinctive-expression-signatures-of-serum-micrornas-in-ischaemic-stroke-and-transient-ischaemic-attack-patients
#16
Jia Wu, Chun-Li Fan, Li-Juan Ma, Ting Liu, Cheng Wang, Jia-Xi Song, Qiu-Shi Lv, Hao Pan, Chun-Ni Zhang, Jun-Jun Wang
Circulating microRNAs (miRNAs) have recently emerged as promising biomarkers for ischaemic stroke (IS). However, the expression patterns of specific miRNAs in transient ischaemic attack (TIA) patients have not been investigated. Their predictive values for the presence of IS and TIA and their relationships to the neurological deficit severity of IS and the subsequent stroke risk after TIA remain unclear exactly. In this study, 754 miRNAs were initially screened by the TaqMan Low Density Array (TLDA) in two pooled serum samples from 50 IS patients and 50 controls...
March 2, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28245171/mir-181a-inhibits-cervical-cancer-development-via-downregulating-grp78
#17
Chengyan Luo, Jiangnan Qiu
Cervical is among one of the top common cancers of women worldwide. Understanding the pathological mechanisms of cervical cancer development is critical for identifying novel targets for cervical cancer treatment. microRNAs (miRs) have various roles in regulating cancer development. Here, we investigated the potential roles of miR-181a and its target in regulating cervical cancer development and chemotherapy resistance. Expression of miR-181a was evaluated and modulated in several human cervical cancer cell lines...
February 13, 2017: Oncology Research
https://www.readbyqxmd.com/read/28242633/divergent-effects-of-mir-181-family-members-on-myocardial-function-through-protective-cytosolic-and-detrimental-mitochondrial-microrna-targets
#18
Samarjit Das, Mark Kohr, Brittany Dunkerly-Eyring, Dong I Lee, Djahida Bedja, Oliver A Kent, Anthony K L Leung, Jorge Henao-Mejia, Richard A Flavell, Charles Steenbergen
BACKGROUND: MicroRNA (miRNA) is a type of noncoding RNA that can repress the expression of target genes through posttranscriptional regulation. In addition to numerous physiologic roles for miRNAs, they play an important role in pathophysiologic processes affecting cardiovascular health. Previously, we reported that nuclear encoded microRNA (miR-181c) is present in heart mitochondria, and importantly, its overexpression affects mitochondrial function by regulating mitochondrial gene expression...
February 27, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28236575/unravelling-endogenous-microrna-system-dysfunction-as-a-new-pathophysiological-mechanism-in-machado-joseph-disease
#19
Vitor Carmona, Janete Cunha-Santos, Isabel Onofre, Ana Teresa Simões, Udaya Vijayakumar, Beverly L Davidson, Luís Pereira de Almeida
Machado-Joseph disease (MJD) is a genetic neurodegenerative disease caused by an expanded polyglutamine tract within the protein ataxin-3 (ATXN3). Despite current efforts, MJD's mechanism of pathogenesis remains unclear and no disease-modifying treatment is available. Therefore, in this study, we investigated (1) the role of the 3' UTR of ATXN3, a putative microRNA (miRNA) target, (2) whether miRNA biogenesis and machinery are dysfunctional in MJD, and (3) which specific miRNAs target ATXN3-3' UTR and whether they can alleviate MJD neuropathology in vivo...
April 5, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28224609/mir-181-elevates-akt-signaling-by-co-targeting-phlpp2-and-inpp4b-phosphatases-in-luminal-breast-cancer
#20
Michaela Strotbek, Simone Schmid, Ismael Sánchez-González, Melanie Boerries, Hauke Busch, Monilola A Olayioye
The PI3K-Akt pathway is one of the most commonly dysregulated cancer-associated signaling pathways. Here we report an oncogenic function for the miR-181 family in luminal breast cancer cells that involves Akt hyperactivation. We show that miR-181a and miR-181d posttranscriptionally suppress the expression of PHLPP2 and INPP4B phosphatases, resulting in elevated growth factor-induced Akt phosphorylation. Ectopic expression of miR-181a and miR-181d promoted S-phase entry and cell proliferation, which was reversed by pharmacological Akt inhibition...
February 22, 2017: International Journal of Cancer. Journal International du Cancer
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