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Min Sha, Mei Lin, Jia Wang, Jun Ye, Jie Xu, Ning Xu, Junxing Huang
BACKGROUND: The objective of this study was to investigate the role and mechanism of long non-coding RNA MIAT in gastric cancer (GC). METHODS: Real-time PCR was used to determine MIAT level in 120 GC tissues, and in two gastric cancer cell lines. The clinicopathological characteristics of MIAT in GC patients were analyzed. Small interfering RNA specific for MIAT (si-MIAT) and lentivector for si-MIAT was performed to down-regulate MIAT expression in GC cells and in animal tumor model, respectively...
March 14, 2018: Journal of Experimental & Clinical Cancer Research: CR
Wenting Zhao, Zhen Wang, Zewei Sun, Yuxian He, Dongdong Jian, Xiaotong Hu, Wang Zhang, Liangrong Zheng
The DEAD box protein DDX5, an ATP-dependent RNA helicase, plays an important role in transcriptional regulation and is associated with solid tumors and leukemia. However, its role in oxLDL-induced lipid uptake in macrophages remains unclear. In this study, we detected the expression of DDX5 mRNA and protein in oxidized low-density lipoprotein (oxLDL)-treated human primary macrophages that were induced from monocytes isolated from human peripheral blood with or without several chemical inhibitors using quantitative real-time PCR (qRT-PCR) or Western blotting...
March 6, 2018: Experimental Cell Research
Byoung-San Moon, Jinlun Bai, Mingyang Cai, Chunming Liu, Jiandang Shi, Wange Lu
Kruppel-like factor 4 (Klf4) is a zinc-finger-containing protein that plays a critical role in diverse cellular physiology. While most of these functions attribute to its role as a transcription factor, it is postulated that Klf4 may play a role other than transcriptional regulation. Here we demonstrate that Klf4 loss in neural progenitor cells (NPCs) leads to increased neurogenesis and reduced self-renewal in mice. In addition, Klf4 interacts with RNA-binding protein Staufen1 (Stau1) and RNA helicase Ddx5/17...
January 26, 2018: Nature Communications
Monalisa Das, Arun Renganathan, Shrinivas Nivrutti Dighe, Utsa Bhaduri, Abhijith Shettar, Geetashree Mukherjee, Paturu Kondaiah, Manchanahalli R Satyanarayana Rao
Long non-coding RNAs (lncRNAs) are emerging as important players in regulation of gene expression in higher eukaryotes. DDX5/p68 RNA helicase protein which is involved in splicing of precursor mRNAs also interacts with lncRNAs like, SRA and mrhl, to modulate gene expression. We performed RIP-seq analysis in HEK293T cells to identify the complete repertoire of DDX5/p68 interacting transcripts including 73 single exonic (SE) lncRNAs. The LOC284454 lncRNA is the second top hit of the list of SE lncRNAs which we have characterized in detail for its molecular features and cellular functions...
February 1, 2018: RNA Biology
Masmudur M Rahman, Eugenie Bagdassarian, Mohamed A M Ali, Grant McFadden
Myxoma virus (MYXV), a Leporipoxvirus, is being developed as an oncolytic virotherapeutic for the treatment of a variety of human cancers. MYXV tropism for human cancer cells is largely mediated by intracellular signaling networks that regulate viral replication or innate antiviral response pathways. Thus, MYXV is fully or partially permissive for the majority of human cancer cells that harbor defects in antiviral signaling, but a minority are nonpermissive because the virus infection aborts before its completion...
November 16, 2017: Scientific Reports
Babatunde A Ayodele, Michiko Mirams, Charles N Pagel, Eleanor J Mackie
Chondrocyte hypertrophy makes important contributions to bone development and growth. We have investigated a number of novel cartilage genes identified in a recent transcriptomic study to determine whether they are differentially expressed between different zones of equine foetal growth cartilage. Twelve genes (ATP6V0D2, BAK1, DDX5, GNB1, PIP4K2A, RAP1B, RPS7, SRSF3, SUB1, TMSB4, TPI1 and WSB2) were found to be more highly expressed in the zone of hypertrophic chondrocytes than in the reserve or proliferative zones, whereas FOXA3 and SERPINA1 were expressed at lower levels in the hypertrophic zone than in the reserve zone...
December 2017: Bone Reports
Cyril F Bourgeois, Didier Auboeuf
No abstract text is available yet for this article.
2017: Stem Cell Investigation
Huijuan Zhang, Guishuan Wang, Lin Liu, Xiaolin Liang, Yu Lin, Yi-Yu Lin, Chu-Fang Chou, Mo-Fang Liu, Hefeng Huang, Fei Sun
The chromatoid body (CB) is a specific cloud-like structure in the cytoplasm of haploid spermatids. Recent findings indicate that CB is identified as a male germ cell specific RNA storage and processing center, but its function has remained elusive for decades. In somatic cells, KH-type splicing regulatory protein (KSRP) is involved in regulating gene expression and maturation of select microRNAs (miRNAs). However, the function of KSRP in spermatogenesis remains unclear. In this study, we showed that KSRP partly localizes in CB, as a component of CB...
September 4, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
Hiresh Ayoubian, Thomas Fröhlich, Dagmar Pogodski, Andrew Flatley, Elisabeth Kremmer, Aloys Schepers, Regina Feederle, Georg J Arnold, Friedrich A Grässer
The Epstein-Barr virus is a human herpes virus with oncogenic potential. The virus-encoded nuclear antigen 2 (EBNA2) is a key mediator of viral tumorigenesis. EBNA2 features an arginine-glycine (RG) repeat at amino acids (aa)339-354 that is essential for the transformation of lymphocytes and contains symmetrically (SDMA) and asymmetrically (ADMA) di-methylated arginine residues. The SDMA-modified EBNA2 binds the survival motor neuron protein (SMN), thus mimicking SMD3, a cellular SDMA-containing protein that interacts with SMN...
August 2017: Journal of General Virology
Qiaofen Fu, Xin Song, Zhen Liu, Xiaojie Deng, Rongcheng Luo, Chunlei Ge, Ruilei Li, Zhen Li, Mengyang Zhao, Yiyu Chen, Xian Lin, Qianbing Zhang, Weiyi Fang
Purpose: This study was performed to identify the detailed mechanisms by which miR-296-3p functions as a tumor suppressor to prevent lung adenocarcinoma (LADC) cell growth, metastasis, and chemoresistance.Experimental Design: The miR-296-3p expression was examined by real-time PCR and in situ hybridization. MTT, EdU incorporation, Transwell assays, and MTT cytotoxicity were respectively performed for cell proliferation, metastasis, and chemoresistance; Western blotting was performed to analyze the pathways by miR-296-3p and HDGF/DDX5 complex...
October 15, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Dong Ju Son, Yu Yeon Jung, Young Sik Seo, Heonyong Park, Dong Hun Lee, Sanghyeon Kim, Yoon-Seok Roh, Sang Bae Han, Do Young Yoon, Jin Tae Hong
Interleukin-32 (IL-32) is a multifaceted cytokine that promotes inflammation and regulates vascular endothelial cell behavior. Although some IL-32 isoforms have been reported to contribute to vascular inflammation and atherosclerosis, the functional role of IL-32α in vascular inflammation and atherogenesis has not been studied. Methods: IL-32α function was assessed in cells with transient IL-32α overexpression or treated with recombinant human IL-32α by western blotting and mRNA expression analysis. Vascular smooth muscle cell (VSMC) proliferation and migration was examined by BrdU incorporation and wound healing assays, respectively...
2017: Theranostics
M Kokolo, M Bach-Elias
The DEAD box p68 RNA helicase (DDX5) is required to manipulate RNA structures implicated in mRNA/rRNA processing and transcript export, and acts as a co-activator for a range of transcription factors. Previous research has indicated that p68 RNA helicase may also be important in tumour development. Wild-type HeLa and stable HeLa (clone 13) cell cultures containing RNAi-mediated depletion of p68 RNA helicase induced by doxycycline (DOX) were used to study how the p68 RNA helicase affects the mTOR cell signalling pathway...
2017: Folia Biologica (Praha)
Xin Sun, Shengyu Wang, Xian Lin, Lianzhong Zhao, Dan Zhang, Chenyang Yi, Xiaomei Sun, Huanchun Chen, Meilin Jin
Duck Tembusu virus (DTMUV) is a newly emerging pathogenic flavivirus that has caused huge economic losses to the duck industry in China since 2010. Moreover, the infection has spread rapidly, posing a potential public health concern. In this study, iTRAQ approach was first used to quantitatively identify differentially expressed cellular proteins in DTMUV-infected BHK-21 cells which are usually employed to produce veterinary vaccines for DTMUV, as well as other flaviviruses by serial passage. We identified 192 differentially expressed cellular proteins, including 11 upregulated and eight downregulated proteins at 24 h postinfection (hpi), as well as 25 upregulated and 151 downregulated proteins at 48 hpi, of which TLR9, DDX3X, and DDX5 may play important roles in virus propagation...
June 2017: Proteomics
Song Qing, Wuniqiemu Tulake, Mingfang Ru, Xiaohong Li, Reziwanguli Yuemaier, Dilare Lidifu, Aierken Rouzibilali, Axiangu Hasimu, Yun Yang, Reziya Rouziahong, Halmurat Upur, Abulizi Abudula
It is known that high-risk human papillomavirus infection is the main etiological factor in cervical carcinogenesis. However, human papillomavirus screening is not sufficient for early diagnosis. In this study, we aimed to identify potential biomarkers common to cervical carcinoma and human papillomavirus infection by proteomics for human papillomavirus-based early diagnosis and prognosis. To this end, we collected 76 cases of fresh cervical tissues and 116 cases of paraffin-embedded tissue slices, diagnosed as cervical squamous cell carcinoma, cervical intraepithelial neoplasia II-III, or normal cervix from ethnic Uighur and Han women...
April 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Qingzhong He, Wei Ge
The tandem Agenet domain (TAD) of fragile X mental retardation protein (FMRP) protein is considered to be a member of the methyl-lysine-binding Tudor domain "Royal family". Several groups have reported that the TAD binds with methylated histones and plays a role in DNA damage responses. FMRP is a RNA-binding protein predominantly resident in cytoplasm. Therefore, in this study, we identified DDX5, FUS, EWSR1 and LSM14A as TAD-interacting proteins sensitive to F32L and/or Y96L mutation by pull-down assays and mass spectrometry...
April 19, 2017: Scientific Reports
Zheng Xing, Siwen Wang, Elizabeth J Tran
DEAD-box proteins are a class of nonprocessive RNA helicases that dynamically modulate the structure of RNA and ribonucleoprotein complexes (RNPs). However, the precise roles of individual members are not well understood. Work from our laboratory revealed that the DEAD-box protein Dbp2 in Saccharomyces cerevisiae is an active RNA helicase in vitro that functions in transcription by promoting mRNP assembly, repressing cryptic transcription initiation, and regulating long noncoding RNA activity. Interestingly, Dbp2 is also linked to glucose sensing and hexose transporter gene expression...
July 2017: RNA
Huanhuan Li, Ping Lai, Jinping Jia, Yawei Song, Qing Xia, Kaimeng Huang, Na He, Wangfang Ping, Jiayu Chen, Zhongzhou Yang, Jiao Li, Mingze Yao, Xiaotao Dong, Jicheng Zhao, Chunhui Hou, Miguel A Esteban, Shaorong Gao, Duanqing Pei, Andrew P Hutchins, Hongjie Yao
No abstract text is available yet for this article.
April 6, 2017: Cell Stem Cell
Christian M Nefzger, Jose M Polo
The role of RNA binding proteins (RBPs) during nuclear reprogramming is poorly characterized. In this issue of Cell Stem Cell,Li et al. (2017) show that DEAD-box RBP DDX5 acts as a reprogramming roadblock and give important mechanistic insights into the establishment of pluripotency by characterizing the intricate downstream events.
April 6, 2017: Cell Stem Cell
Anat Zimmer, Shlomit Amar-Farkash, Tamar Danon, Uri Alon
BACKGROUND: Drugs often kill some cancer cells while others survive. This stochastic outcome is seen even in clonal cells grown under the same conditions. Understanding the molecular reasons for this stochastic outcome is a current challenge, which requires studying the proteome at the single cell level over time. In a previous study we used dynamic proteomics to study the response of cancer cells to a DNA damaging drug, camptothecin. Several proteins showed bimodal dynamics: they rose in some cells and decreased in others, in a way that correlated with eventual cell fate: death or survival...
March 7, 2017: BMC Systems Biology
Zhenchuan Ma, Jie Feng, Yurui Guo, Ranran Kong, Yuefeng Ma, Liangzhang Sun, Xiaoping Yang, Bin Zhou, Shaomin Li, Wei Zhang, Jiantao Jiang, Jin Zhang, Zhe Qiao, Yao Cheng, Danjie Zha, Shiyuan Liu
DEAD (Asp-Glu-Ala-Asp) box protein 5 (DDX5), a prototypical member of the DEAD/H-box protein family, has been involved in several human malignancies. However, the expression and biological role of DDX5 in esophageal cancer (EC) remain largely unknown. In this study, we examined the role of DDX5 in regulating EC cell proliferation and tumorigenesis and explored its possible molecular mechanism. We found that DDX5 was overexpressed in human EC cell lines. In addition, knockdown of DDX5 significantly inhibited the proliferation of EC cells in vitro and the growth of EC xenografts in vivo...
July 5, 2017: Oncology Research
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