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https://www.readbyqxmd.com/read/28810927/stat3-mediated-upregulation-of-lncrna-hoxd-as1-as-a-cerna-facilitates-liver-cancer-metastasis-by-regulating-sox4
#1
Hui Wang, Xisong Huo, Xin-Rong Yang, Jia He, Lijun Cheng, Na Wang, Xuan Deng, Haojie Jin, Ning Wang, Cun Wang, Fangyu Zhao, Jingyuan Fang, Ming Yao, Jia Fan, Wenxin Qin
BACKGROUND: Several of the thousands of human long noncoding RNAs (lncRNAs) have been functionally characterized, yet their potential involvement in hepatocellular carcinoma (HCC) remains poorly understood. METHODS: LncRNA-HOXD-AS1 was identified by microarray and validated by real-time PCR. The clinicopathological significance of HOXD-AS1 was analyzed by Kaplan-Meier method. Chromatin immunoprecipitation was conducted to examine the mechanism of HOXD-AS1 upregulation...
August 14, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28808061/structural-analyses-of-the-bacterial-primosomal-protein-dnab-reveal-that-it-is-a-tetramer-and-forms-a-complex-with-a-primosomal-re-initiation-protein
#2
Yi-Ching Li, Vankadari Naveen, Min-Guan Lin, Chwan-Deng Hsiao
The DnaB primosomal protein from Gram-positive bacteria plays a key role in DNA replication and restart as a loader protein for the recruitment of replisome cascade proteins. Previous investigations have established that DnaB is composed of an N-terminal domain, a middle domain, and a C-terminal domain. However, structural evidence for how DnaB functions at the atomic level is lacking. Here, we report the crystal structure of DnaB, encompassing the N-terminal and middle domains (residues 1-300), from Geobacillus stearothermophilus (GstDnaB1-300) at 2...
August 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28806780/the-arac-negative-regulator-family-modulates-the-activity-of-histone-like-proteins-in-pathogenic-bacteria
#3
Araceli E Santiago, Michael B Yan, Tracy H Hazen, Brooke Sauder, Mario Meza-Segura, David A Rasko, Melissa M Kendall, Fernando Ruiz-Perez, James P Nataro
The AraC Negative Regulators (ANR) comprise a large family of virulence regulators distributed among diverse clinically important Gram-negative pathogens, including Vibrio spp., Salmonella spp., Shigella spp., Yersinia spp., Citrobacter spp., and pathogenic E. coli strains. We have previously reported broad effects of the ANR members on regulators of the AraC/XylS family. Here, we interrogate possible broader effects of the ANR members on the bacterial transcriptome. Our studies focused on Aar (AggR-activated regulator), an ANR family archetype in enteroaggregative E...
August 14, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28806733/the-interaction-between-endogenous-30s-ribosomal-subunit-protein-s11-and-cucumber-mosaic-virus-ls2b-protein-affects-viral-replication-infection-and-gene-silencing-suppressor-activity
#4
Ruilin Wang, Zhiyou Du, Zhenqing Bai, Zongsuo Liang
Cucumber mosaic virus (CMV) is a model virus for plant-virus protein interaction and mechanism research because of its wide distribution, high-level of replication and simple genome structure. The 2b protein is a multifunctional protein encoded by CMV that suppresses RNA silencing-based antiviral defense and contributes to CMV virulence in host plants. In this report, 12 host proteins were identified as CMV LS2b binding partners using the yeast two-hybrid screen system from the Arabidopsis thaliana cDNA library...
2017: PloS One
https://www.readbyqxmd.com/read/28800794/long-intergenic-noncoding-rna-319-linc00319-promotes-cell-proliferation-and-invasion-in-lung-cancer-cells-by-directly-downregulating-the-tumor-suppressor-mir-32
#5
Bo Zhou, Wenwen Yuan, Xinping Li
Long non-coding RNAs (lncRNAs) have been shown to play important regulatory roles in the pathogenesis and progression of multiple cancers. Here, we investigated the role of long intergenic non coding RNA 319 (linc00319) in the proliferation and invasion of lung cancer cells. We found that, compared with normal lung cell line HBE, linc00319 was increased in low metastatic lung cancer cell lines PAa and AgiY-83a, and further increased in high metastatic lung cancer cell lines A549 and Anip-973. Then, different concentrations of pcDNA-linc00319 expression vector and different concentrations of linc00319 siRNA were respectively transfected into A549 lung cancer cells...
August 11, 2017: Oncology Research
https://www.readbyqxmd.com/read/28796375/effects-of-long-noncoding-rna-spry4-it1-mediated-ezh2-on-the-invasion-and-migration-of-lung-adenocarcinoma
#6
Xin Wen, Xin-Rui Han, Yong-Jian Wang, Shao-Hua Fan, Juan Zhuang, Zi-Feng Zhang, Qun Shan, Meng-Qiu Li, Bin Hu, Chun-Hui Sun, Qiao Wu, Jun-Hua Tan, Dong-Mei Wu, Jun Lu, Yuan-Lin Zheng
We aim to investigate the interaction between the EZH2 and the long noncoding RNA (lncRNA) SPRY4-IT1. We also explore their respective effects on human lung adenocarcinoma (LA) cell invasion and migration. Both LA and adjacent normal tissues were obtained from 256 LA patients. SPTY4-IT expression and EZH2 mRNA expressions in tissues and cells were detected by reverse transcription quantitative polymerase chain reaction (RT-qPCR). The siRNAs against SPRY4-IT1 and EZH2 were co-transfected into A549 and H1975 cells...
August 10, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28793782/direct-activation-of-nadph-oxidase-2-by-2-deoxyribose-1-phosphate-triggers-nuclear-factor-kappa-b-dependent-angiogenesis
#7
Dina Vara, Joanna M Watt, Tiago M Fortunato, Harry Mellor, Matthew Burgess, Kate Wicks, Kimberly Mace, Shaun Reeksting, Anneke T Lubben, Caroline Pd Wheeler-Jones, Giordano Pula
AIMS: Deoxyribose-1-phosphate (dRP) is a pro-angiogenic paracrine stimulus released by cancer cells, platelets and macrophages and acting on endothelial cells. The objective of this study was to clarify how dRP stimulates angiogenic responses in human endothelial cells. RESULTS: Live cell imaging, electron paramagnetic resonance (EPR), pull-down of dRP-interacting proteins followed by immunoblotting, gene silencing of different NOXs and their regulatory co-subunits by siRNA transfection, and experiments with inhibitors of the sugar transporter GLUT1 were utilized to demonstrate that dRP acts intracellularly by directly activating the endothelial NADPH oxidase 2 (NOX2) complex, but not NOX4...
August 10, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28791349/ubiquitin-specific-peptidase-4-stabilizes-interferon-regulatory-factor-protein-and-promotes-its-function-to-facilitate-interleukin-4-expression-in-t-helper-type-2-cells
#8
Zhixiang Guo, Peng Xu, Shangqing Ge, Chengxin Zhang, Xiaoyan Zheng, Jinguo Xu, Zhuang Liu, Bin Li, Shenglin Ge
We speculated that ubiquitin specific peptidase 4 (USP4) may deubiquitinate interferon regulatory factor 4 (IRF4) and affect T helper type 2 (Th2) cell function. This study aimed to validate this hypothesis. Here, the interaction between USP4 and IRF4 were analyzed by co-immunoprecipitation assay. The deubiquitin effect of USP4 on IRF4 was analyzed by the Ni-NTA pull down assay. Luciferase reporter gene constructs were used to analyze the effects of USP4, IRF4 and nuclear factor of activated T cell-2 (NFATc2) on the activation of the interleukin-4 (IL-4) promoter...
August 3, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28790170/dimerization-of-the-transmembrane-domain-of-amyloid-precursor-protein-is-determined-by-residues-around-the-gamma-secretase-cleavage-sites
#9
Yan Yan, Ting-Hai Xu, Kaleeckal G Harikumar, Laurence J Miller, Karsten Melcher, H Eric Xu
One of the hallmarks of Alzheimer's disease (AD) is the formation of extracellular amyloid plaques that consist mainly of abnormally aggregated forms of amyloid β (Aβ) peptides. These peptides are generated by γ-secretase-catalyzed cleavage of a dimeric membrane-bound C-terminal fragment (C99) of the amyloid precursor protein (APP). While C99 homodimerization has been linked to Aβ; production and changes in the aggregation-determining Aβ42/Aβ40 ratio, the motif through which C99 dimerizes has remained controversial...
August 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28790108/cyclophilin-a-maintains-glioma-initiating-cell-stemness-by-regulating-wnt-%C3%AE-catenin-signaling
#10
Guangzhi Wang, Jia Shen, Jiahang Sun, Zhenfeng Jiang, Jiabing Fan, Hongjun Wang, Shan Yu, Yu Long, Yi Liu, HOngbo Bao, Kelvin X Zhang, Ke Han, Min-Wei Zhu, Yongri Zheng, Zhiguo Lin, Chuanlu Jiang, Mian Guo
PURPOSE: Glioma-initiating cells (GICs) are glioma stem-like cells that contribute to glioblastoma (GBM) development, recurrence, and resistance to chemotherapy and radiotherapy. They have recently become the focus of novel treatment strategies. Cyclophilin A (CypA) is a cytosolic protein that belongs to the peptidyl-prolyl isomerase (PPIase) family and the major intracellular target of the immunosuppressive drug cyclosporin A (CsA). In this study, we investigate the functions of CypA and its mechanism of action in GICs' development...
August 8, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28780070/identification-of-cry48aa-cry49aa-toxin-ligands-in-the-midgut-of-culex-quinquefasciatus-larvae
#11
Tatiana Maria Teodoro Rezende, Tatiany Patrícia Romão, Michel Batista, Colin Berry, Michael J Adang, Maria Helena Neves Lobo Silva-Filha
A binary mosquitocidal toxin composed of a three-domain Cry-like toxin (Cry48Aa) and a binary-like toxin (Cry49Aa) was identified in Lysinibacillus sphaericus. Cry48Aa/Cry49Aa has action on Culex quinquefasciatus larvae, in particular, to those that are resistant to the Bin Binary toxin, which is the major insecticidal factor from L. sphaericus-based biolarvicides, indicating that Cry48Aa/Cry49Aa interacts with distinct target sites in the midgut and can overcome Bin toxin resistance. This study aimed to identify Cry48Aa/Cry49Aa ligands in C...
August 2, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28775305/selection-and-characterization-of-dna-aptamer-against-glucagon-receptor-by-cell-selex
#12
Guodong Wang, Jun Liu, Ke Chen, Yiling Xu, Bo Liu, Jie Liao, Lei Zhu, Xiaoxiao Hu, Jianglin Li, Ying Pu, Wen Zhong, Ting Fu, Huixia Liu, Weihong Tan
Excessive secretion of glucagon, a functional insulin antagonist, significantly contributes to hyperglycemia. Glucagon exerts its physiological functions through activation of the glucagon receptor (GCGR). Inhibition of GCGR activity represents a potential therapeutic approach for reducing excess glucose production in diabetes mellitus. Aptamers are short DNA or RNA oligonucleotides evolved from systematic evolution of ligands by exponential enrichment (SELEX). Here, we have successfully selected a DNA aptamer against GCGR by cell-SELEX, which can specifically bind membrane protein of CHO-GCGR cells with a K d of 52...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28775288/a-polypeptide-from-the-junction-region-sequence-of-ews-fli1-inhibits-ewing-s-sarcoma-cells-interacts-with-the-ews-fli1-and-partner-proteins
#13
Krishna Priya Thangaretnam, Gopal Gopisetty, Priya Ramanathan, Thangarajan Rajkumar
The EWS-FLI1 chimeric protein uniquely expressed in Ewing's sarcoma has an obligate role in its aetiology. In our previous report we showed that ectopic expression of the DNA sequences form the junction region (a.a 251-280) can inhibit Ewing's sarcoma cell growth. In the present report, we introduced a peptide (TAT/NLS/EWS-PEP) comprising of thirty amino acids spanning the junction in conjunction with HIV-1-trans-activating (TAT) and nuclear localization signal sequence (NLS). Peptide uptake and localization studies revealed presence of peptide in ~99% of transduced cells and in the nucleus...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28774282/interaction-between-nfatc2-and-the-transcription-factor-sp1-in-pancreatic-carcinoma-cells-patu-8988t
#14
Manuela Malsy, Bernhard Graf, Katrin Almstedt
BACKGROUND: Nuclear factors of activated T-cells (NFATs) have been mainly characterized in the context of immune response regulation because, as transcription factors, they have the ability to induce gene transcription. NFAT proteins are found in several types of tumors, for instance, pancreatic carcinoma. The role of NFATs in carcinogenesis is regulating central genes in cell differentiation and cell growth. NFAT proteins are primarily located in cytoplasm and only transported to the cell nucleus after activation...
August 3, 2017: BMC Molecular Biology
https://www.readbyqxmd.com/read/28772210/lncrna-ghet1-activated-by-h3k27-acetylation-promotes-cell-tumorigenesis-through-regulating-atf1-in-hepatocellular-carcinoma
#15
Gangqiang Ding, Wei Li, Junping Liu, Yanli Zeng, Chongshan Mao, Yi Kang, Jia Shang
BACKGROUND: GHET1 is one of tumor-related lncRNAs. We aimed to explore the functional involvement of GHET1 in hepatocellular carcinoma (HCC). METHODS: In this study, HCC tissues and the paired normal tissues were collected for the detection of target molecules. The expression level of target molecules in HCC tissues or cell lines was determined by qRT-PCR and western blot, respectively. The expression of endogenous GHET1 and ATF1 was modulated by using cell transfection...
July 31, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28770177/bipc-a-predicted-burkholderia-pseudomallei-type-3-secretion-system-translocator-protein-with-actin-binding-activity
#16
Charles W Vander Broek, Nurhamimah Zainal Abidin, Joanne M Stevens
Burkholderia pseudomallei is an intracellular bacterial pathogen and the causative agent of melioidosis, a severe disease of humans and animals. Like other clinically important Gram-negative bacteria, fundamental to B. pseudomallei pathogenesis is the Bsa Type III Secretion System. The Bsa system injects bacterial effector proteins into the cytoplasm of target host cells subverting cellular pathways for the benefit of the bacteria. It is required for invasion of non-phagocytic host cells, escape from the endocytic compartment into the host cell cytoplasm, and for virulence in murine models of melioidosis...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28766720/molecular-characterization-of-rice-arsenic-induced-ring-finger-e3-ligase-2-osair2-and-its-heterogeneous-overexpression-in-arabidopsis-thalaiana
#17
Sun-Goo Hwang, Sandeep Chapagain, A-Reum Han, Yong Chan Park, Hyeon Mi Park, Yong Hwan Kim, Cheol Seong Jang
Arsenic (As) accumulation adversely affects the growth and productivity of plants and poses a serious threat to human health and food security. In this study, we identified one As-responsive Really Interesting New Gene (RING) E3 ubiquitin ligase gene from rice root tissues during As stress. We named it Oryza sativa Arsenic-Induced RING E3 ligase 2 (OsAIR2). Expression of OsAIR2 was induced under various abiotic stress conditions, including heat, salt, drought, and As exposure. Results of an in vitro ubiquitination assay showed that OsAIR2 possesses an E3 ligase activity...
August 2, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28765911/lcmr1-interacts-with-dek-to-suppress-apoptosis-in-lung-cancer-cells
#18
Yang Xu, Zhixin Liang, Chunsun Li, Zhen Yang, Liangan Chen
To win the war against lung cancer, the molecular mechanisms underlying its oncogenesis and metastasis must be identified in order to develop novel diagnosis and treatment strategies. We previously identified a novel gene, namely lung cancer metastasis related protein 1 (LCMR1; GenBank accession no. AY148462), which was demonstrated to be overexpressed in non‑small‑cell lung cancer. LCMR1 expression was significantly associated with clinical stage. To further understand the mechanism of LCMR1 in lung cancer, the present study screened a cDNA library from the lung cancer cell line 95D for proteins interacting with LCMR1 by yeast two‑hybrid assay, and the protein DEK was identified...
July 27, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28754689/direct-interaction-of-ezrin-and-aqp2-and-its-role-in-aqp2-trafficking
#19
Wei Li, William W Jin, Kenji Tsuji, Ying Chen, Naohiro Nomura, Limin Su, Naofumi Yui, Julian Arthur, Susanna Cotecchia, Teodor G Păunescu, Dennis Brown, Hua A J Lu
The water channel aquaporin-2 (AQP2) is a major regulator of water homeostasis in response to vasopressin (VP). Dynamic trafficking of AQP2 relies on its close interaction with trafficking machinery proteins and the actin cytoskeleton. Here, we report the identification of ezrin, an actin binding protein from the ezrin/radixin/moesin (ERM) family as an AQP2 interacting protein. Ezrin was first detected in a co-immunoprecipitation (co-IP) complex using an anti-AQP2 antibody by proteomic analysis. Immunofluorescence staining revealed the co-expression of ezrin and AQP2 in collecting duct principal cells, and VP treatment caused redistribution of both proteins to the apical membrane...
July 28, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28751780/traf6-is-a-novel-ns3-interacting-protein-that-inhibits-classical-swine-fever-virus-replication
#20
Huifang Lv, Wang Dong, Zhi Cao, Xiaomeng Li, Jie Wang, Gui Qian, Qizhuang Lv, Chengbao Wang, Kangkang Guo, Yanming Zhang
Classical swine fever virus (CSFV) non-structural protein 3 (NS3) is a multifunctional non-structural protein that plays a major role in viral replication. However, how exactly NS3 exerts these functions remains unknown. Here, we identified tumour necrosis factor receptor-associated factor 6 (TRAF6) as a novel NS3-interacting protein via yeast two-hybrid analysis, co-immunoprecipitation, and glutathione S-transferase pull-down assays. Furthermore, we observed that TRAF6 overexpression significantly inhibited CSFV replication, and TRAF6 knockdown promoted CSFV replication in porcine alveolar macrophages...
July 27, 2017: Scientific Reports
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