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Peng Chen, Jialin Pan, Xinming Zhang, Zhewei Shi, Xiangjun Yang
BACKGROUND The role of miR-181a in the development of cardiac disease and in particular, myocardial fibrosis following myocardial infarction (MI) remains unknown. The aim of this study was to explore the role of miR-181a in myocardial fibrosis in a rat model of MI and the expression of TGF-β receptor III (TβRIII). MATERIAL AND METHODS Forty adult male Wistar rats were randomly divided into an MI model group (n=30) and a control group with (n=10). The rat MI model involved ligating the left anterior descending (LAD) coronary artery in the model group; the control group was treated with a sham operation...
June 16, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Muqing Gu, Lijuan Wang, Chun Yang, Xue Li, Chanwei Jia, Stephane Croteau, Xiangyan Ruan, Pierre Hardy
BACKGROUND: Recent investigations have indicated that hormone therapy may increase the risk of breast cancer (BC), and the addition of synthetic progestins may play a critical role in this. Several studies have pointed out the important role of progesterone receptor membrane component 1 (PGRMC1) in the development of BC, especially with hormone therapy using progestins. Although the deregulation of microRNA-181a (miR-181a) is often associated with human BC, the effect of miR-181a on PGRMC1 expression during hormone therapy has not been investigated...
August 2018: Maturitas
Shao-Yan Lv, Ti-Dong Shan, Xin-Ting Pan, Zi-Bin Tian, Xi-Shuang Liu, Fu-Guo Liu, Xue-Guo Sun, Hui-Guang Xue, Xin-Hua Li, Yue Han, Li-Juan Sun, Li Chen, Ling-Yun Zhang
Long noncoding RNAs (lncRNAs) are important regulators of the biological functions and underlying molecular mechanisms of colorectal cancer (CRC). However, the role of the lncRNA ZEB1-AS1 in CRC is not thoroughly understood. In this study, we found that ZEB1-AS1 was markedly upregulated in CRC. ZEB1-AS1 knockdown significantly suppressed CRC cell proliferation and induced apoptosis, whereas enhanced expression of ZEB1-AS1 had the opposite effect. Bioinformatics analysis identified miR-181a-5p as a candidate target of ZEB1-AS1...
June 9, 2018: Cell Cycle
Lucas L van den Hoogen, Marzia Rossato, Ana P Lopes, Aridaman Pandit, Cornelis P J Bekker, Ruth D E Fritsch-Stork, Joel A G van Roon, Timothy R D J Radstake
Objective: To investigate miRNA expression in relation to transcriptomic changes in plasmacytoid dendritic cells (pDCs) in SLE and APS. pDCs are major producers of IFNα in SLE and APS, and miRNAs are emerging as regulators of pDC activation. Methods: miRNA and mRNA expression were measured by OpenArray and RNA-sequencing in pDCs of SLE, SLE + APS (APS secondary to SLE) and primary APS (PAPS) patients. The miRNA profile of patients was compared with the miRNA pattern of TLR7-activated pDCs...
June 4, 2018: Rheumatology
Federica Baldassari, Carlotta Zerbinati, Marco Galasso, Fabio Corrà, Linda Minotti, Chiara Agnoletto, Maurizio Previati, Carlo M Croce, Stefano Volinia
Background: Breast cancer (BC) represents the most common cancer in women worldwide. Due to its heterogeneous nature, breast cancer management might benefit from differential treatments toward personalized medicine. Additionally, drug resistance is a common phenomenon. We systematically investigated the effect of 14 different drugs administered on BC cell lines in combination with microRNAs (miRNA, miR). Methods: Thirty-eight miRNAs, all associated with BC by clinical and molecular parameters including progression, prognosis and subtypes, were tested for their effects on the viability of 12 different BC cell lines...
2018: Frontiers in Genetics
Hongwei Zhao, Xiaobei Zhang, Ying Zheng, Yuan Li, Xiaokun Wang, Nan Hu, Peng Zhou, Kaiyuan Wang
We aimed to evaluate the cardioprotective effect and mechanism of propofol in anthracycline-induced cardiomyocyte apoptosis. We selected the rat myocardial cell line, H9c2, and primary cardiomyocytes for in vitro study. The cardiomyocytes were treated with vehicle, Adriamycin® (ADM), propofol, or a combination of ADM and propofol. The proportion of apoptotic cells and the expression of miR-181a were detected by flow cytometry and real-time PCR, respectively. Luciferase assays were performed to explore the direct target gene of miR-181a...
2018: Oxidative Medicine and Cellular Longevity
Bingyi Shao, Xiaohui Fu, Yang Yu, Deqin Yang
Post-menopausal osteoporosis is a bone formation disorder induced by estrogen deficiency. Estrogen deficiency facilitates the differentiation and maturation of osteoclasts by activating T lymphocytes. In our previous study, it was demonstrated that estrogen promotes bone marrow mesenchymal stem cell (BMMSC)‑induced osteoclast apoptosis through downregulation of microRNA (miR)‑181a and subsequent Fas ligand (FasL) protein accumulation. In the present study, the regulatory effects of miR‑181a on FasL expression in BMMSCs and the apoptotic effects of BMMSCs on cluster of differentiation (CD)4+T lymphocytes were investigated...
May 16, 2018: Molecular Medicine Reports
Xiaodan Liu, Hongxia Peng, Wang Liao, Ailing Luo, Mansi Cai, Jing He, Xiaohong Zhang, Ziyan Luo, Hua Jiang, Ling Xu
Neuroblastoma is a pediatric malignancy, and the clinical phenotypes range from localized tumors with excellent outcomes to widely metastatic disease in which long-term survival is approximately 40%, despite intensive therapy. Emerging evidence suggests that aberrant miRNA regulation plays a role in neuroblastoma, but the miRNA functions and mechanisms remain unknown. miR-181 family members were detected in 32 neuroblastoma patients, and the effects of miR-181a/b on cell viability, invasion and migration were evaluated in vitro and in vivo...
May 26, 2018: Molecular Carcinogenesis
Stefan Emming, Michele Chirichella, Silvia Monticelli
MicroRNAs (miRNAs) are short RNA molecules that regulate gene expression post-transcriptionally. They have emerged as important modulators of T lymphocyte biology, influencing cell activation, differentiation and proliferation in response to environmental signals. Here, we will discuss how miRNAs expressed by T cells can influence two key aspects of tumorigenesis, namely the direct, cell-intrinsic oncogenic transformation of T lymphocytes, as well as the indirect effects on tumor growth mediated by altered immune surveillance...
May 22, 2018: Cancer Letters
Xiao-Yun Liu, Fei-Ran Zhang, Jin-Yan Shang, Ying-Ying Liu, Xiao-Fei Lv, Jia-Ni Yuan, Ting-Ting Zhang, Kai Li, Xiao-Chun Lin, Xiu Liu, Qingqing Lei, Xiao-Dong Fu, Jia-Guo Zhou, Si-Jia Liang
The development of nephrotoxicity largely limits the clinical use of chemotherapy. MiRNAs are able to target various genes and involved in the regulation of diverse cellular processes, including cell apoptosis and death. Our study showed that miR-181a expression was significantly increased after 5-fluorouracil (5-FU) treatment in renal mesangial cells and kidney tissue, which was associated with decreased baculoviral inhibition of apoptosis protein repeat-containing 6 (BIRC6) expression and increased apoptotic rate...
May 23, 2018: Cell Death & Disease
Chintamani Atreya, Neetu Dahiya
BACKGROUND: A small GTPase protein, the Ras-related protein 1 (RAP1), abundant in platelets is known to be activated following agonist induced platelet activation, suggesting that RAP1 downregulation could in turn reduce platelet activation in storage. Our objective of this study is to identify RAP1 regulating miRNAs and their role in platelet activation during storage. METHODS: We applied MS2-TRAP (tagged RNA affinity purification) methodology to enrich miRNAs that target the 3' untranslated region (3'UTR) of RAP1 mRNA in two mammalian cell lines followed by miRNA identification by microarray of total RNA samples enriched for miRNAs...
May 20, 2018: MicroRNA
Ravindresh Chhabra
The characteristics of cancer stem cells (CSCs) and the genes responsible for their maintenance are highly variable in different cancers. Here, we identify the coordination among miRNAs and EGF pathway genes which is critical for the maintenance of CSCs in cervical cancer. The transcript analysis of CSCs enriched from cervical cancer cell lines (CaSki and HeLa) revealed a significant upregulation of SOX2. Since EGF receptor is frequently over expressed in cervical cancer, we hypothesized that EGF pathway may be responsible for the upregulation of SOX2...
May 18, 2018: Scientific Reports
Ye Hou, Liangliang Fu, Jingjin Li, Jingxuan Li, Yunxia Zhao, Yu Luan, An Liu, Huiying Liu, Xinyun Li, Shuhong Zhao, Changchun Li
>Emerging evidence indicates that microRNA (miRNA) plays an important role in adipogenesis and disease pathogenesis. To investigate the miRNA involved in regulating different periods of adipogenesis, we performed a comprehensive study on microRNAome during the stimulation of adipogenesis by an adipogenic differentiation cocktail in C2C12 myoblasts at 0, 2, 4, and 7 days using the Solexa sequencing technology. In this study, we identified 52 differentially expressed (DE) miRNA. Functional annotation indicated that the target genes of DE miRNA were mostly enriched in adipogenic transdifferentiation and fat metabolism-related pathways, including Wnt, mitogen-activated protein kinase (MAPK), and insulin signaling...
May 16, 2018: Lipids
Yuki Kagoya, Munehide Nakatsugawa, Kayoko Saso, Tingxi Guo, Mark Anczurowski, Chung-Hsi Wang, Marcus O Butler, Cheryl H Arrowsmith, Naoto Hirano
Adoptive T-cell therapy is a promising therapeutic approach for cancer patients. The use of allogeneic T-cell grafts will improve its applicability and versatility provided that inherent allogeneic responses are controlled. T-cell activation is finely regulated by multiple signaling molecules that are transcriptionally controlled by epigenetic mechanisms. Here we report that inhibiting DOT1L, a histone H3-lysine 79 methyltransferase, alleviates allogeneic T-cell responses. DOT1L inhibition reduces miR-181a expression, which in turn increases the ERK phosphatase DUSP6 expression and selectively ameliorates low-avidity T-cell responses through globally suppressing T-cell activation-induced gene expression alterations...
May 15, 2018: Nature Communications
Wu Sun, Xiaojun Wang, Jialu Li, Chaoying You, Pan Lu, Huijin Feng, Yan Kong, Haiyang Zhang, Yanqing Liu, Ruihua Jiao, Xi Chen, Yi Ba
Colorectal cancer (CRC) is a very common metastatic tumor with active angiogenesis that requires active angiogenesis. Recently, increased microRNA-181a-5p (miR-181a) expression was found to be significantly associated with liver metastasis and poor outcome in CRC patients. In this study, the role of miR-181a in tumor angiogenesis was further investigated. Capillary tube formation assays were used to demonstrate the ability of miR-181a to promote tumor angiogenesis. Bioinformatics analyses identified SRC kinase signaling inhibitor 1 (SRCIN1) as a potential target of miR-181a...
April 19, 2018: Cell Death & Disease
Xian-Jin Du, Jing-Min Lu, Yin Sha
Atherosclerosis is a kind of chronic inflammation disease with lipid accumulation in in blood vessel linings. Increasing evidence has reported that microRNAs can exert crucial roles in atherosclerosis. In previous study, miR-181a has been implicated to be abnormally expressed in atherosclerosis mice, however its detailed function in atherosclerosis remains uninvestigated. Hence, in our current study, we focused on the biological role of miR-181a in atherosclerosis progression. Ox-LDL has been commonly identified as an important atherosclerosis regulator...
May 8, 2018: Journal of Cellular Physiology
Lu Shi, Xiang Li, Zhiqiang Wu, Xiaolei Li, Jing Nie, Mingzhou Guo, Qian Mei, Weidong Han
Microsatellite instability (MSI) defines a subtype of colorectal cancer (CRC) with typical clinicopathologic characteristics. CRCs with MSI (MSI CRCs) frequently acquire accelerated carcinogenesis and 5-FU resistance, and the exact underlying mechanism remains incompletely understood. Our previous study has identified the microRNA (miRNA) expression profile in MSI CRCs. In this study, three miRNAs (miR-181a, miR-135a and miR-302c) were validated by qRT-PCR to be dramatically decreased in 67 CRC samples. Proliferation and apoptosis assays demonstrated that miR-181a/135a/302c function as tumor suppressors via repressing PLAG1/IGF2 signaling...
April 13, 2018: Journal of Genetics and Genomics, Yi Chuan Xue Bao
Eliza Pawlik-Pachucka, Monika Budzinska, Zofia Wicik, Anna Domaszewska-Szostek, Magdalena Owczarz, Malgorzata Roszkowska-Gancarz, Magdalena Gewartowska, Monika Puzianowska-Kuznicka
PURPOSE: It is not established if healthy aging of the thyroid axis is associated with alterations other than changes in hormone secretion. METHODS: The expression of thyroid hormone receptor β gene (THRB) was analyzed in peripheral blood mononuclear cells (PBMC) obtained from young, elderly, and long-lived individuals. The interaction between the 3'UTR of TRβ1 mRNA and selected miRNAs was measured using pmirGLO reporter vector. Methylation of the THRB CpG island was analyzed using methylation-sensitive restriction/RT-PCR and bisulfite sequencing methods...
May 7, 2018: Endocrine Research
Agnieszka Szymczyk, Sylwia Chocholska, Arkadiusz Macheta, Dariusz Szczepanek, Marek Hus, Monika Podhorecka
Numerous genetic alterations predicting prognosis and clinical outcome are revealed recently in chronic lymphocytic leukemia (CLL). Among them the deregulated expression of micro RNAs that can induce tumor growth, or act as tumor suppressors seem to be of great importance. This study aimed to analyze the possible role of chosen micro RNAs as markers of prognosis in patients with CLL. We assessed the expression of miR-21, miR-34a, miR-181a, miR-199a/b and miR-221 in previously separated leukemic cells with the use of qRQ-PCR technique at the moment of diagnosis...
April 10, 2018: Oncotarget
Jessica S Kurata, Ren-Jang Lin
MicroRNAs (miRNAs) are posttranscriptional gene regulators that play important roles in the control of cell fitness, differentiation, and development. The CRISPR-Cas9 gene-editing system is composed of the Cas9 nuclease in complex with a single guide RNA (sgRNA) and directs DNA cleavage at a predetermined site. Several CRISPR-Cas9 libraries have been constructed for genome-scale knockout screens of protein function; however few libraries have included miRNA genes. Here we constructed a miRNA-focused CRISPR-Cas9 library that targets 1,594 (85%) annotated human miRNA stem-loops...
May 2, 2018: RNA
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