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https://www.readbyqxmd.com/read/28928437/as1411-aptamer-anionic-linear-globular-dendrimer-g2-iohexol-selective-nano-theranostics
#1
Pardis Mohammadzadeh, Reza Ahangari Cohan, Seyedeh Masoumeh Ghoreishi, Ahmad Bitarafan-Rajabi, Mehdi Shafiee Ardestani
Molecular theranostics is of the utmost interest for diagnosis as well as treatment of different malignancies. In the present study, anionic linear globular dendrimer G2 is employed as a suitable carrier for delivery and AS1411 aptamer is exploited as the targeting agent to carry Iohexol specifically to the human breast cancer cells (MCF-7). Dendrimer G2 was prepared and conjugation of dendrimer and aptamer was carried out thereafter. Based on the data yielded by AFM, morphology of smooth and spherical non-targeted dendrimer changed to the rough aspherical shape when it conjugated...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28925950/targeting-host-cell-surface-nucleolin-for-rsv-therapy-challenges-and-opportunities
#2
Peter Mastrangelo, Michael J Norris, Wenming Duan, Edward G Barrett, Theo J Moraes, Richard G Hegele
Nucleolin (NCL) has been reported as a cellular receptor for the human respiratory syncytial virus (RSV). We studied the effects of re-purposing AS1411, an anti-cancer compound that binds cell surface NCL, as a possible novel strategy for RSV therapy in vitro and in vivo. AS1411 was administered to RSV-infected cultures of non-polarized (HEp-2) and polarized (MDCK) epithelial cells and to virus-infected mice and cotton rats. Results of in vitro experiments showed that AS1411, used in micromolar concentrations, was associated with decreases in the number of virus-positive cells...
September 19, 2017: Vaccines
https://www.readbyqxmd.com/read/28913345/a-yeast-model-for-the-mechanism-of-the-epstein-barr-virus-immune-evasion-identifies-a-new-therapeutic-target-to-interfere-with-the-virus-stealthiness
#3
COMMENT
María José Lista, Rodrigo Prado Martins, Gaelle Angrand, Alicia Quillévéré, Chrysoula Daskalogianni, Cécile Voisset, Marie-Paule Teulade-Fichou, Robin Fåhraeus, Marc Blondel
The oncogenic Epstein-Barr virus (EBV) evades the immune system but has an Achilles heel: its genome maintenance protein EBNA1. Indeed, EBNA1 is essential for viral genome replication and maintenance but also highly antigenic. Hence, EBV evolved a system in which the glycine-alanine repeat (GAr) of EBNA1 limits the translation of its own mRNA at a minimal level to ensure its essential function thereby, at the same time, minimizing immune recognition. Defining intervention points where to interfere with EBNA1 immune evasion is an important step to trigger an immune response against EBV-carrying cancers...
August 31, 2017: Microbial Cell
https://www.readbyqxmd.com/read/28900213/copine-7-binds-to-the-cell-surface-receptor-nucleolin-and-regulates-ciliogenesis-and-dspp-expression-during-odontoblast-differentiation
#4
You-Mi Seo, Su-Jin Park, Hye-Kyung Lee, Joo-Cheol Park
Tooth development is a progressive process regulated by interactions between epithelial and mesenchymal tissues. Our previous studies showed that copine-7 (Cpne7), a dental epithelium-derived protein, is a signalling molecule that is secreted by preameloblasts and regulates the differentiation of preodontoblasts into odontoblasts. However, the mechanisms involved in the translocation of Cpne7 from preameloblasts to preodontoblasts and the functions of Cpne7 during odontogenesis are poorly understood. Here, we showed that the internalization of Cpne7 was mediated primarily by caveolae...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28874822/carbon-dots-as1411-aptamer-nanoconjugate-for-ultrasensitive-spectrofluorometric-detection-of-cancer-cells
#5
Hasan Motaghi, Masoud Ayatollahi Mehrgardi, Philippe Bouvet
In the present study, a sensitive and selective signal-on method for aptamer based spectrofluorometric detection of cancer cells is introduced. AS1411, a nucleolin aptamer, is wrapped around water-soluble carbon dots and used as a probe for the detection of several types of cancer cells. Nucleolin, is overexpressed on the surface of cancer cells. Mouse breast 4T1, human breast MCF7, and human cervical HeLa cancer cells were selected as target cells, while human foreskin fibroblast cells HFFF-PI6 served as control cells...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28868110/erratum-quick-chip-assay-using-locked-nucleic-acid-modified-epithelial-cell-adhesion-molecule-and-nucleolin-aptamers-for-the-capture-of-circulating-tumor-cells-biomicrofluidics-9-5-054110-2015
#6
Nihal G Maremanda, Kislay Roy, Rupinder K Kanwar, Vidyarani Shyamsundar, Vijayalakshmi Ramshankar, Arvind Krishnamurthy, Subramanian Krishnakumar, Jagat R Kanwar
[This corrects the article DOI: 10.1063/1.4930983.].
July 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28841406/g-quadruplex-and-calf-thymus-dna-interaction-of-quaternized-tetra-and-octa-pyridyloxy-substituted-indium-iii-phthalocyanines
#7
Efkan Bağda, Esra Bağda, Mahmut Durmuş
The interactions of small molecules with G-quadruplex and double stranded DNA are important due to their potential biological and medical usages. In the present paper, the interactions of indium (III) phthalocyanines (quaternized 2,3,9,10,16,17,23,24-octakis-[(3-pyridyloxy) phthalocyaninato] chloroindium(III): OInPc and quaternized 2(3),9(10),16(17),23(24)-tetrakis-[(3-pyridyloxy) phthalocyaninato] chloroindium(III): TInPc) with hybrid G-quadruplex (Tel 21) and parallel G-quadruplexes (nucleolin, KRAS, c-MYC, vegf) were studied...
August 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28827664/integrated-analysis-of-mrna-and-mirna-expression-in-hela-cells-expressing-low-levels-of-nucleolin
#8
Sanjeev Kumar, Elizabhet Cruz Gomez, Mounira Chalabi-Dchar, Cong Rong, Sadhan Das, Iva Ugrinova, Xavier Gaume, Karine Monier, Fabien Mongelard, Philippe Bouvet
Nucleolin is an essential protein that plays important roles in the regulation of cell cycle and cell proliferation. Its expression is up regulated in many cancer cells but its molecular functions are not well characterized. Nucleolin is present in the nucleus where it regulates gene expression at the transcriptional and post-transcriptional levels. Using HeLa cells depleted in nucleolin we performed an mRNA and miRNA transcriptomics analysis to identify biological pathways involving nucleolin. Bioinformatic analysis strongly points to a role of nucleolin in lipid metabolism, and in many signaling pathways...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28771197/the-susceptibilities-of-respiratory-syncytial-virus-to-nucleolin-receptor-blocking-and-antibody-neutralization-are-dependent-upon-the-method-of-virus-purification
#9
Leanne M Bilawchuk, Cameron D Griffiths, Lionel D Jensen, Farah Elawar, David J Marchant
Respiratory Syncytial Virus (RSV) that is propagated in cell culture is purified from cellular contaminants that can confound experimental results. A number of different purification methods have been described, including methods that utilize fast protein liquid chromatography (FPLC) and gradient ultracentrifugation. Thus, the constituents and experimental responses of RSV stocks purified by ultracentrifugation in sucrose and by FPLC were analyzed and compared by infectivity assay, Coomassie stain, Western blot, mass spectrometry, immuno-transmission electron microscopy (TEM), and ImageStream flow cytometry...
August 3, 2017: Viruses
https://www.readbyqxmd.com/read/28758620/antibodies-against-the-mono-methylated-arginine-glycine-repeat-mma-rg-of-the-epstein-barr-virus-nuclear-antigen-2-ebna2-identify-potential-cellular-proteins-targeted-in-viral-transformation
#10
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
https://www.readbyqxmd.com/read/28751161/new-perspectives-of-physiological-and-pathological-functions-of-nucleolin-ncl
#11
REVIEW
Wenyu Jia, Zhenyu Yao, Jiajun Zhao, Qingbo Guan, Ling Gao
Nucleolin (NCL) is a multifunctional protein that mainly localized in the nucleolus, it is also found in the nucleoplasm, cytoplasm and cell membrane. The three main structural domains allow the interaction of NCL with different proteins and RNA sequences. Moreover, specific post-translational modifications and its shuttling property also contribute to its multifunctionality. NCL has been demonstrated to be involved in a variety of aspects such as ribosome biogenesis, chromatin organization and stability, DNA and RNA metabolism, cytokinesis, cell proliferation, angiogenesis, apoptosis regulation, stress response and microRNA processing...
October 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/28736361/-effect-of-nucleolin-silencing-on-differentiation-of-rat-neural-stem-cells-in-vitro-and-the-molecular-mechanism
#12
Chong-Feng Chen, Huai-Cai Yang, Guo-Sheng Liu
OBJECTIVE: To investigate the effect of nucleolin silencing on the differentiation of rat neural stem cells (NSCs) and the role of Wnt signaling pathway in mediating such effect. METHODS: Adenovirus vectors expressing small interfering RNA (siRNA) against nucleolin were constructed, verified, and packaged in HEK293A cells. The adenovirus was then transfected into NSCs isolated from neonatal SD rats and the differentiation of the NSCs was examined by detecting the expressions of neuron specific encloase (NSE) and glial fibrillary acidic protein (GFAP) using immunocytochemistry...
July 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28690315/targeting-nucleolin-for-better-survival-in-diffuse-large-b-cell-lymphoma
#13
N Jain, H Zhu, T Khashab, Q Ye, B George, R Mathur, R K Singh, Z Berkova, J F Wise, F K Braun, X Wang, K Patel, Z Y Xu-Monette, J Courty, K H Young, L Sehgal, F Samaniego
Anthracyclines have been a cornerstone in the cure of diffuse large B-cell lymphoma (DLBCL) and other hematological cancers. The ability of anthracyclines to eliminate DLBCL depends on the presence of topoisomerase-II-alpha (TopIIA), a DNA repair enzyme complex. We identified nucleolin as a novel binding partner of TopIIA. Abrogation of nucleolin sensitized DLBCL cells to TopIIA targeting agents (doxorubicin/etoposide). Silencing nucleolin and challenging DLBCL cells with doxorubicin enhanced the phosphorylation of H2AX (γH2AX-marker of DNA damage) and allowed DNA fragmentation...
July 10, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28685753/nucleolin-directly-mediates-epstein-barr-virus-immune-evasion-through-binding-to-g-quadruplexes-of-ebna1-mrna
#14
María José Lista, Rodrigo Prado Martins, Olivier Billant, Marie-Astrid Contesse, Sarah Findakly, Pierre Pochard, Chrysoula Daskalogianni, Claire Beauvineau, Corinne Guetta, Christophe Jamin, Marie-Paule Teulade-Fichou, Robin Fåhraeus, Cécile Voisset, Marc Blondel
The oncogenic Epstein-Barr virus (EBV) evades the immune system but has an Achilles heel: its genome maintenance protein EBNA1, which is essential for viral genome maintenance but highly antigenic. EBV has seemingly evolved a system in which the mRNA sequence encoding the glycine-alanine repeats (GAr) of the EBNA1 protein limits its expression to the minimal level necessary for function while minimizing immune recognition. Here, we identify nucleolin (NCL) as a host factor required for this process via a direct interaction with G-quadruplexes formed in GAr-encoding mRNA sequence...
July 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28685471/gold-nanoparticle-based-fluorescent-contrast-agent-with-enhanced-sensitivity
#15
Kyung Aih Kang, Mai-Dung Nguyen
Gold nanoparticle (GNP) based contrast agents that are highly specific and sensitive for both optical and X-ray/CT imaging modalities are being developed for detecting the cancer expressing nucleolin and matrix metallo-proteinase 14 (MMP-14) on the cell membrane: Nucleolin is normally present in the nucleus. For many cancer cells, however, it is over-expressed on the cell membrane, having it to be a good cancer marker. Aptamer AS1411 is known to be an excellent target for nucleolin and also known to treat several cancer types; and MMP-14 in cancer is involved in tumor angiogenesis, blood vessel re-organization, and metastasis...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28659485/cytomegalovirus-late-protein-pul31-alters-pre-rrna-expression-and-nuclear-organization-during-infection
#16
Kristen N Westdorp, Andrea Sand, Nathaniel J Moorman, Scott S Terhune
The replication cycle of human cytomegalovirus (CMV) leads to drastic reorganization of domains in the host cell nucleus. However, the mechanisms involved and how these domains contribute to infection are not well understood. Our recent studies defining the CMV-induced nuclear proteome identified several viral proteins of unknown functions, including a protein encoded by the UL31 gene. We set out to define the role of UL31 in CMV replication. UL31 is predicted to encode a 74-kDa protein, referred to as pUL31, containing a bipartite nuclear localization signal, an intrinsically disordered region overlapping arginine-rich motifs, and a C-terminal dUTPase-like structure...
September 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28656213/bmh-21-inhibits-viability-and-induces-apoptosis-by-p53-dependent-nucleolar-stress-responses-in-skov3-ovarian-cancer-cells
#17
Xinxu Fu, Lu Xu, Ling Qi, Hongyan Tian, Dan Yi, Yang Yu, Shibing Liu, Songyan Li, Ye Xu, Chunyan Wang
The nucleolus is a stress sensor associated with cell cycle progression and apoptosis. Studies have shown that nucleolar stress is positively correlated with apoptosis in breast, prostate and lung cancer cells. However, the role and function of nucleolar stress in ovarian cancer has not been reported. In this study, we found that the nucleolar stress inducer BMH-21 inhibited viability of SKOV3 ovarian cancer cells in a dose-dependent manner. Furthermore, BMH-21 induced the expression of nucleolar stress marker proteins (nucleolin, nucleophosmin and fibrillarin) and promoted the nuclear export of these proteins...
June 23, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28620837/retraction-note-to-nucleolin-promotes-tgf-%C3%AE-signaling-initiation-via-tgf-%C3%AE-receptor-i-in-glioblastoma
#18
Shunzeng Lv, Jie Zhang, Mingzhi Han, Weiping Wang, Ya Zhang, Dongxiao Zhuang, Ranran Shi, Ruixiang Bian, Chengjun Yao
No abstract text is available yet for this article.
June 15, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28589727/identification-of-microprotein-protein-interactions-via-apex-tagging
#19
COMPARATIVE STUDY
Qian Chu, Annie Rathore, Jolene K Diedrich, Cynthia J Donaldson, John R Yates, Alan Saghatelian
Microproteins are peptides and small proteins encoded by small open reading frames (smORFs). Newer technologies have led to the recent discovery of hundreds to thousands of new microproteins. The biological functions of a few microproteins have been elucidated, and these microproteins have fundamental roles in biology ranging from limb development to muscle function, highlighting the value of characterizing these molecules. The identification of microprotein-protein interactions (MPIs) has proven to be a successful approach to the functional characterization of these genes; however, traditional immunoprecipitation methods result in the enrichment of nonspecific interactions for microproteins...
July 5, 2017: Biochemistry
https://www.readbyqxmd.com/read/28542563/evaluation-of-somatostatin-and-nucleolin-receptors-for-therapeutic-delivery-in-non-small-cell-lung-cancer-stem-cells-applying-the-somatostatin-analog-dotatate-and-the-nucleolin-targeting-aptamer-as1411
#20
Sif Holmboe, Pernille Lund Hansen, Helge Thisgaard, Ines Block, Carolin Müller, Niels Langkjær, Poul Flemming Høilund-Carlsen, Birgitte Brinkmann Olsen, Jan Mollenhauer
Cancer stem cells represent the putative tumor-driving subpopulation thought to account for drug resistance, relapse, and metastatic spread of epithelial and other cancer types. Accordingly, cell surface markers for therapeutic delivery to cancer stem cells are subject of intense research. Somatostatin receptor 2 and nucleolin are known to be overexpressed by various cancer types, which have elicited comprehensive efforts to explore their therapeutic utilization. Here, we evaluated somatostatin receptor 2 targeting and nucleolin targeting for therapeutic delivery to cancer stem cells from lung cancer...
2017: PloS One
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