Base de dados : MEDLINE Pesquisa : A13.350.150 [Categoria DeCS] Referências encontradas : 54677 [refinar] Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 5468

ir para página

1 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29380441 [Au] Autor: Waugh CA; Arukwe A; Jaspers VLB [Ad] Endereço: Environmental Toxicology, Department of Biology, Faculty of Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway. [Ti] Título: Deregulation of microRNA-155 and its transcription factor NF-kB by polychlorinated biphenyls during viral infections. [So] Source: APMIS;126(3):234-240, 2018 Mar. [Is] ISSN: 1600-0463 [Cp] País de publicação: Denmark [La] Idioma: eng [Ab] Resumo: Polychlorinated biphenyls (PCBs), and similar environmental contaminants, have been linked to virus outbreaks and increased viral induced mortality since the 1970s. Yet the mechanisms behind this increased susceptibility remain elusive. It has recently been illustrated that the innate immune viral detection system is tightly regulated by small non-coding RNAs, including microRNAs (miRNAs). For virus infections miRNA-155 expression is an important host response against infection, and deregulation of this miRNA is closely associated with adverse outcomes. Thus, we designed a targeted in vitro study using primary chicken fibroblasts, first exposed to a mixture of PCBs (Arochlor-1250) before being stimulated with a synthetic RNA virus (poly I:C), to determine if PCBs have the potential to deregulate miRNA-155. In this paper, we provide the first data for the deregulation of miRNA-155 when a host is exposed to a mixture of PCBs before a virus infection. Thus, we provide important evidence that PCBs can be involved in the deregulation of important miRNA pathways involved in the immune system; thereby demonstrating novel insights into the mechanism of PCB toxicity on the immune system. [Mh] Termos MeSH primário: Imunidade Inata/genética MicroRNAs/genética NF-kappa B/genética Poli I-C/farmacologia Bifenilos Policlorados/química Vírus/imunologia [Mh] Termos MeSH secundário: Animais Linhagem Celular Embrião de Galinha Galinhas/genética Galinhas/imunologia Regulação da Expressão Gênica/imunologia Seres Humanos Viroses/genética Viroses/imunologia Viroses/virologia [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (MIRN155 microRNA, human); 0 (MicroRNAs); 0 (NF-kappa B); DFC2HB4I0K (Polychlorinated Biphenyls); O84C90HH2L (Poly I-C) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180309 [Lr] Data última revisão: 180309 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180131 [St] Status: MEDLINE [do] DOI: 10.1111/apm.12811

2 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28460484 [Au] Autor: Wiese M; Walther N; Diederichs C; Schill F; Monecke S; Salinas G; Sturm D; Pfister SM; Dressel R; Johnsen SA; Kramm CM [Ad] Endereço: Division of Pediatric Hematology and Oncology, Department of Child and Adolescent Health, University Medical Center Goettingen, Goettingen, Germany. [Ti] Título: The ß-catenin/CBP-antagonist ICG-001 inhibits pediatric glioma tumorigenicity in a Wnt-independent manner. [So] Source: Oncotarget;8(16):27300-27313, 2017 Apr 18. [Is] ISSN: 1949-2553 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Pediatric high-grade gliomas (pedHGG) belong to the most aggressive cancers in children with a poor prognosis due to a lack of efficient therapeutic strategies. The ß-catenin/Wnt-signaling pathway was shown to hold promising potential as a treatment target in adult high-grade gliomas by abrogating tumor cell invasion and the acquisition of stem cell-like characteristics. Since pedHGG differ from their adult counterparts in genetically and biologically we aimed to investigate the effects of ß-catenin/Wnt-signaling pathway-inhibition by the ß-catenin/CBP antagonist ICG-001 in pedHGG cell lines. In contrast to adult HGG, pedHGG cells displayed minimal detectable canonical Wnt-signaling activity. Nevertheless, low doses of ICG-001 inhibited cell migration/invasion, tumorsphere- and colony formation, proliferation in vitro as well as tumor growth in vivo/ovo, suggesting that ICG-001 affects pedHGG tumor cell characteristics independent of ß-catenin/Wnt-signaling. RNA-sequencing analyses support a Wnt/ß-catenin-independent effect of ICG-001 on target gene transcription, revealing strong effects on genes involved in cellular metabolic/biosynthetic processes and cell cycle progression. Among these, high mRNA expression of cell cycle regulator JDP2 was found to confer a better prognosis for pedHGG patients. In conclusion, ICG-001 might offer an effective treatment option for pedHGG patients functioning to regulate cell phenotype and gene expression programs in absence of Wnt/ß-catenin signaling-activity. [Mh] Termos MeSH primário: Compostos Bicíclicos Heterocíclicos com Pontes/farmacologia Proteína de Ligação a CREB/antagonistas & inibidores Transformação Celular Neoplásica/efeitos dos fármacos Transformação Celular Neoplásica/metabolismo Glioma/metabolismo Pirimidinonas/farmacologia Via de Sinalização Wnt/efeitos dos fármacos beta Catenina/antagonistas & inibidores [Mh] Termos MeSH secundário: Adolescente Animais Linhagem Celular Tumoral Movimento Celular/efeitos dos fármacos Movimento Celular/genética Autorrenovação Celular/efeitos dos fármacos Sobrevivência Celular/efeitos dos fármacos Transformação Celular Neoplásica/genética Embrião de Galinha Criança Pré-Escolar Bases de Dados Genéticas Modelos Animais de Doenças Glioma/genética Glioma/mortalidade Glioma/patologia Seres Humanos Estimativa de Kaplan-Meier Células-Tronco Neoplásicas/citologia Células-Tronco Neoplásicas/efeitos dos fármacos Células-Tronco Neoplásicas/metabolismo Prognóstico Adulto Jovem [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Bridged Bicyclo Compounds, Heterocyclic); 0 (ICG 001); 0 (Pyrimidinones); 0 (beta Catenin); EC 2.3.1.48 (CREB-Binding Protein); EC 2.3.1.48 (CREBBP protein, human) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180305 [Lr] Data última revisão: 180305 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170503 [St] Status: MEDLINE [do] DOI: 10.18632/oncotarget.15934

3 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28451636 [Au] Autor: Erb M; Lee B; Yeon Seo S; Lee JW; Lee S; Lee SK [Ad] Endereço: Papé Family Pediatric Research Institute, Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239. [Ti] Título: The Isl1-Lhx3 Complex Promotes Motor Neuron Specification by Activating Transcriptional Pathways that Enhance Its Own Expression and Formation. [So] Source: eNeuro;4(2), 2017 Mar-Apr. [Is] ISSN: 2373-2822 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Motor neuron (MN) progenitor cells rapidly induce high expression of the transcription factors Islet-1 (Isl1), LIM-homeobox 3 (Lhx3), and the transcriptional regulator LMO4, as they differentiate. While these factors are critical for MN specification, the mechanisms regulating their precise temporal and spatial expression patterns are not well characterized. Isl1 and Lhx3 form the Isl1-Lhx3 complex, which induces the transcription of genes critical for MN specification and maturation. Here, we report that , , and are direct target genes of the Isl1-Lhx3 complex. Our results show that specific genomic loci associated with these genes recruit the Isl1-Lhx3 complex to activate the transcription of , , and in embryonic MNs of chick and mouse. These findings support a model in which the Isl1-Lhx3 complex amplifies its own expression through a potent autoregulatory feedback loop and simultaneously enhances the transcription of . LMO4 blocks the formation of the V2 interneuron-specifying Lhx3 complex. In developing MNs, this action inhibits the expression of V2 interneuron genes and increases the pool of unbound Lhx3 available to incorporate into the Isl1-Lhx3 complex. Identifying the pathways that regulate the expression of these key factors provides important insights into the genetic strategies utilized to promote MN differentiation and maturation. [Mh] Termos MeSH primário: Proteínas com Homeodomínio LIM/metabolismo Neurônios Motores/metabolismo Fatores de Transcrição/metabolismo Ativação Transcricional [Mh] Termos MeSH secundário: Proteínas Adaptadoras de Transdução de Sinal/metabolismo Animais Proteínas Aviárias/metabolismo Embrião de Galinha Proteínas de Ligação a DNA/metabolismo Proteínas com Domínio LIM/metabolismo Camundongos Transdução de Sinais [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Adaptor Proteins, Signal Transducing); 0 (Avian Proteins); 0 (DNA-Binding Proteins); 0 (LIM Domain Proteins); 0 (LIM-Homeodomain Proteins); 0 (Lhx3 protein); 0 (Lmo4 protein, mouse); 0 (Transcription Factors); 0 (insulin gene enhancer binding protein Isl-1) [Em] Mês de entrada: 1801 [Cu] Atualização por classe: 180228 [Lr] Data última revisão: 180228 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170429 [St] Status: MEDLINE

4 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29385169 [Au] Autor: Bissa M; Forlani G; Zanotto C; Tosi G; De Giuli Morghen C; Accolla RS; Radaelli A [Ad] Endereço: Department of Pharmacological and Biomolecular Sciences, University of Milan, via Balzaretti 9, Milan, Italy. [Ti] Título: Fowlpoxvirus recombinants coding for the CIITA gene increase the expression of endogenous MHC-II and Fowlpox Gag/Pro and Env SIV transgenes. [So] Source: PLoS One;13(1):e0190869, 2018. [Is] ISSN: 1932-6203 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: A complete eradication of an HIV infection has never been achieved by vaccination and the search for new immunogens that can induce long-lasting protective responses is ongoing. Avipoxvirus recombinants are host-restricted for replication to avian species and they do not have the undesired side effects induced by vaccinia recombinants. In particular, Fowlpox (FP) recombinants can express transgenes over long periods and can induce protective immunity in mammals, mainly due to CD4-dependent CD8+ T cells. In this context, the class II transactivator (CIITA) has a pivotal role in triggering the adaptive immune response through induction of the expression of class-II major histocompatibility complex molecule (MHC-II), that can present antigens to CD4+ T helper cells. Here, we report on construction of novel FPgp and FPenv recombinants that express the highly immunogenic SIV Gag-pro and Env structural antigens. Several FP-based recombinants, with single or dual genes, were also developed that express CIITA, driven from H6 or SP promoters. These recombinants were used to infect CEF and Vero cells in vitro and determine transgene expression, which was evaluated by real-time PCR and Western blotting. Subcellular localisation of the different proteins was evaluated by confocal microscopy, whereas HLA-DR or MHC-II expression was measured by flow cytometry. Fowlpox recombinants were also used to infect syngeneic T/SA tumour cells, then injected into Balb/c mice to elicit MHC-II immune response and define the presentation of the SIV transgene products in the presence or absence of FPCIITA. Antibodies to Env were measured by ELISA. Our data show that the H6 promoter was more efficient than SP to drive CIITA expression and that CIITA can enhance the levels of the gag/pro and env gene products only when infection is performed by FP single recombinants. Also, CIITA expression is higher when carried by FP single recombinants than when combined with FPgp or FPenv constructs and can induce HLA-DR cell surface expression. However, in-vivo experiments did not show any significant increase in the humoral response. As CIITA already proved to elicit immunogenicity by improving antigen presentation, further in-vivo experiments should be performed to increase the immune responses. The use of prime/boost immunisation protocols and the oral administration route of the recombinants may enhance the immunogenicity of Env peptides presented by MHC-II and provide CD4+ T-cell stimulation. [Mh] Termos MeSH primário: Genes Virais Complexo Principal de Histocompatibilidade/genética Proteínas Nucleares/genética Poxviridae/genética Recombinação Genética Vírus da Imunodeficiência Símia/genética Transativadores/genética Transgenes [Mh] Termos MeSH secundário: Vacinas contra a AIDS/genética Vacinas contra a AIDS/imunologia Animais Western Blotting Linfócitos T CD4-Positivos/imunologia Linfócitos T CD8-Positivos/imunologia Linhagem Celular Embrião de Galinha Ensaio de Imunoadsorção Enzimática Infecções por HIV/imunologia Infecções por HIV/prevenção & controle Seres Humanos Camundongos Camundongos Endogâmicos BALB C Microscopia Confocal Regiões Promotoras Genéticas Reação em Cadeia da Polimerase em Tempo Real [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (AIDS Vaccines); 0 (MHC class II transactivator protein); 0 (Nuclear Proteins); 0 (Trans-Activators) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180221 [Lr] Data última revisão: 180221 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180201 [St] Status: MEDLINE [do] DOI: 10.1371/journal.pone.0190869

5 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29191790 [Au] Autor: Scheider J; Afonso-Grunz F; Jessl L; Hoffmeier K; Winter P; Oehlmann J [Ad] Endereço: Goethe University Frankfurt am Main, Institute for Ecology, Evolution and Diversity, Department Aquatic Ecotoxicology, Max-von-Laue-Str. 13, 60438, Frankfurt/M., Germany. Electronic address: J.Scheider@bio.uni-frankfurt.de. [Ti] Título: Morphological and transcriptomic effects of endocrine modulators on the gonadal differentiation of chicken embryos: The case of tributyltin (TBT). [So] Source: Toxicol Lett;284:143-151, 2018 Mar 01. [Is] ISSN: 1879-3169 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: Morphological malformations induced by tributyltin (TBT) exposure during embryonic development have already been characterized in various taxonomic groups, but, nonetheless, the molecular processes underlying these changes remain obscure. The present study provides the first genome-wide screening for differentially expressed genes that are linked to morphological alterations of gonadal tissue from chicken embryos after exposure to TBT. We applied a single injection of TBT (between 0.5 and 30 pg as Sn/g egg) into incubated fertile eggs to simulate maternal transfer of the endocrine disruptive compound. Methyltestosterone (MT) served as a positive control (30 pg/g egg). After 19 days of incubation, structural features of the gonads as well as genome-wide gene expression profiles were assessed simultaneously. TBT induced significant morphological and histological malformations of gonadal tissue from female embryos that show a virilization of the ovaries. This phenotypical virilization was mirrored by altered expression profiles of sex-dependent genes. Among these are several transcription and growth factors (e.g. FGF12, CTCF, NFIB), whose altered expression might serve as a set of markers for early identification of endocrine active chemicals that affect embryonic development by transcriptome profiling without the need of elaborate histological analyses. [Mh] Termos MeSH primário: Diferenciação Celular/efeitos dos fármacos Desenvolvimento Embrionário/efeitos dos fármacos Disruptores Endócrinos/toxicidade Gônadas/efeitos dos fármacos Transcriptoma/efeitos dos fármacos Compostos de Trialquitina/toxicidade [Mh] Termos MeSH secundário: Animais Diferenciação Celular/genética Embrião de Galinha Desenvolvimento Embrionário/genética Feminino Perfilação da Expressão Gênica Regulação da Expressão Gênica no Desenvolvimento/efeitos dos fármacos Estudo de Associação Genômica Ampla Gônadas/embriologia Gônadas/patologia Masculino Caracteres Sexuais [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Endocrine Disruptors); 0 (Trialkyltin Compounds); 4XDX163P3D (tributyltin) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180221 [Lr] Data última revisão: 180221 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171202 [St] Status: MEDLINE

6 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29198037 [Au] Autor: Hu X; Chen S; Jia C; Xue S; Dou C; Dai Z; Xu H; Sun Z; Geng T; Cui H [Ad] Endereço: Institute of Epigenetics and Epigenomics, College of Animal Science and Technology, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu, China. [Ti] Título: Gene expression profile and long non-coding RNA analysis, using RNA-Seq, in chicken embryonic fibroblast cells infected by avian leukosis virus J. [So] Source: Arch Virol;163(3):639-647, 2018 Mar. [Is] ISSN: 1432-8798 [Cp] País de publicação: Austria [La] Idioma: eng [Ab] Resumo: Avian leukosis virus J (ALVJ) infection induces hematopoietic malignancy in myeloid leukemia and hemangioma in chickens. However, little is known about the mechanisms underpinning the unique pathogenesis of ALVJ. In this study, we investigated the gene expression profiles of ALVJ-infected chicken cells and performed a comprehensive analysis of the long non-coding RNAs (lncRNAs) in CEF cells using RNA-Seq. As a result, 36 differentially expressed lncRNAs and 91 genes (FC > 2 and q-values < 0.05) were identified. Bioinformatics analysis revealed that these differentially expressed genes are involved in the innate immune response. Target prediction analysis revealed that these lncRNAs may act in cis or trans and affect the expression of genes which are involved in the anti-viral innate immune responses. Toll-like receptor, RIG-I receptor, NOD-like receptor and JAK-STAT signaling pathways were enriched. Notably, the induced expression of innate immunity genes, including B2M, DHX58, IFI27L2, IFIH1, IRF10, ISG12(2), MX, OAS*A, RSAD2, STAT1, TLR3, IL4I1, and IRF1 (FC > 2 and correlation > 0.95), were highly correlated with the upregulation of several lncRNAs, including MG066618, MG066617, MG066601, MG066629, MG066609 and MG066616. These findings identify the expression profile of lncRNAs in chicken CEF cells infected by ALVJ virus and provide new insights into the molecular mechanisms of ALVJ infection. [Mh] Termos MeSH primário: Vírus da Leucose Aviária/genética Fibroblastos/virologia Interações Hospedeiro-Patógeno RNA Longo não Codificante/genética Transcriptoma/imunologia [Mh] Termos MeSH secundário: Animais Vírus da Leucose Aviária/crescimento & desenvolvimento Vírus da Leucose Aviária/imunologia Linhagem Celular Embrião de Galinha Biologia Computacional Proteína DEAD-box 58/genética Proteína DEAD-box 58/imunologia Fibroblastos/imunologia Perfilação da Expressão Gênica Regulação da Expressão Gênica Imunidade Inata Janus Quinase 1/genética Janus Quinase 1/imunologia Proteínas NLR/genética Proteínas NLR/imunologia RNA Longo não Codificante/imunologia Fatores de Transcrição STAT/genética Fatores de Transcrição STAT/imunologia Análise de Sequência de RNA Transdução de Sinais Receptores Toll-Like/genética Receptores Toll-Like/imunologia [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (NLR Proteins); 0 (RNA, Long Noncoding); 0 (STAT Transcription Factors); 0 (Toll-Like Receptors); EC 2.7.10.2 (Janus Kinase 1); EC 3.6.4.13 (DEAD Box Protein 58) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180220 [Lr] Data última revisão: 180220 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171204 [St] Status: MEDLINE [do] DOI: 10.1007/s00705-017-3659-8

7 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29306027 [Au] Autor: Harris AP; Ismail KA; Nunez M; Martopullo I; Lencinas A; Selmin OI; Runyan RB [Ad] Endereço: Department of Cellular & Molecular Medicine, University of Arizona, Tucson, AZ 85724-5044, United States. [Ti] Título: Trichloroethylene perturbs HNF4a expression and activity in the developing chick heart. [So] Source: Toxicol Lett;285:113-120, 2018 Mar 15. [Is] ISSN: 1879-3169 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: Exposure to trichloroethylene (TCE) is linked to formation of congenital heart defects in humans and animals. Prior interactome analysis identified the transcription factor, Hepatocyte Nuclear Factor 4 alpha (HNF4a), as a potential target of TCE exposure. As a role for HNF4a is unknown in the heart, we examined developing avian hearts for HNF4a expression and for sensitivity to TCE and the HNF4a agonist, Benfluorex. In vitro analysis using a HNF4a reporter construct showed both TCE and HFN4a to be antagonists of HNF4a-mediated transcription at the concentrations tested. HNF4a mRNA is expressed transiently in the embryonic heart during valve formation and cardiac development. Embryos were examined for altered gene expression in the presence of TCE or Benfluorex. TCE altered expression of selected mRNAs including HNF4a, TRAF6 and CYP2C45. There was a transition between inhibition and induction of marker gene expression in embryos as TCE concentration increased. Benfluorex was largely inhibitory to selected markers. Echocardiography of exposed embryos showed reduced cardiac function with both TCE and Benfluorex. Cardiac contraction was reduced by 29% and 23%, respectively at 10 ppb. The effects of TCE and Benfluorex on autocrine regulation of HNF4a, selected markers and cardiac function argue for a functional interaction of TCE and HNF4a. Further, the dose-sensitive shift between inhibition and induction of marker expression may explain the nonmonotonic-like dose response observed with TCE exposure in the heart. [Mh] Termos MeSH primário: Poluentes Ambientais/toxicidade Coração/efeitos dos fármacos Fator 4 Nuclear de Hepatócito/genética Transcrição Genética/efeitos dos fármacos Tricloroetileno/toxicidade [Mh] Termos MeSH secundário: Animais Embrião de Galinha Relação Dose-Resposta a Droga Ecocardiografia Fenfluramina/análogos & derivados Fenfluramina/farmacologia Genes Reporter Coração/diagnóstico por imagem Coração/embriologia Células Hep G2 Fator 4 Nuclear de Hepatócito/agonistas Seres Humanos Miocárdio/metabolismo [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Environmental Pollutants); 0 (HNF4A protein, human); 0 (Hepatocyte Nuclear Factor 4); 290YE8AR51 (Trichloroethylene); 2DS058H2CF (Fenfluramine); 403FO0NQG3 (benfluorex) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180219 [Lr] Data última revisão: 180219 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180107 [St] Status: MEDLINE

8 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29320757 [Au] Autor: Zhang S; Huang Y; Zhu J; Shan L; Gao J; Zhang Y; Yu N; Yang L; Huang J [Ad] Endereço: The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang 832002, China. [Ti] Título: Expression of hNeuritin protein in a baculovirus expression system and the analysis of its activity. [So] Source: Gene;647:129-135, 2018 Mar 20. [Is] ISSN: 1879-0038 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: Neuritin plays an important role in the development and regeneration of the nervous system, and shows good prospects in the treatment and protection of the nervous system. To characterize neuritin function, we constructed a baculovirus expression system of neuritin, and identified the biological activity of the neuritin protein. The results and showed that the expression product could promote the neurite growth of dorsal root ganglion in chicken embryos. The neuritin open reading frame was amplified and cloned into the plasmid pFastBac™HTA. The pFastBac™HTA-neuritin was confirmed to be correct by PCR and DNA sequencing, and then transformed into Escherichia coli DH10Bac. The high purity recombinant Bacmid-neuritin (shuttle vectors) was obtained from DH10Bac through screening and identification. Recombinant virus, including the neuritin gene (virus-neuritin), was produced by transfection of SF9 cells using the bacmid-neuritin, and then amplified repeatedly to express the neuritin fusion protein. Finally, we identified the fusion protein with SDS-PAGE and western blotting, and optimized the best expression time of the neuritin fusion protein. We also analyzed the activity of the expressed protein by dorsal root ganglion from chicken embryos. [Mh] Termos MeSH primário: Baculoviridae/genética Expressão Gênica/genética Proteínas do Tecido Nervoso/genética Proteínas Recombinantes/genética [Mh] Termos MeSH secundário: Animais Linhagem Celular Embrião de Galinha Galinhas/genética Clonagem Molecular/métodos Escherichia coli/genética Gânglios Espinais/metabolismo Plasmídeos/genética Células Sf9 Transfecção/métodos [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Nerve Tissue Proteins); 0 (Recombinant Proteins) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180209 [Lr] Data última revisão: 180209 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180111 [St] Status: MEDLINE

9 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29324805 [Au] Autor: Lee YT; Ko EJ; Lee Y; Kim KH; Kim MC; Lee YN; Kang SM [Ad] Endereço: Center for Inflammation, Immunity & Infection, Institute for Biomedical Sciences, Georgia State University, Atlanta, Georgia, United States of America. [Ti] Título: Intranasal vaccination with M2e5x virus-like particles induces humoral and cellular immune responses conferring cross-protection against heterosubtypic influenza viruses. [So] Source: PLoS One;13(1):e0190868, 2018. [Is] ISSN: 1932-6203 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Current influenza vaccines do not provide broad cross-protection. Here, we report that intranasal vaccination with virus-like particles containing the highly conserved multiple ectodomains of matrix protein 2 (M2e5x VLP) of influenza virus induces broad cross-protection by M2-specific humoral and cellular immune responses. M2e5x VLP intranasal vaccination prevented severe weight loss, attenuated inflammatory cytokines and cellular infiltrates, and lowered viral loads, and induced germinal center phenotypic B and plasma cells. In addition, depletion studies demonstrate the protective roles of CD4 and CD8 T cells induced by M2e5x VLP intranasal vaccination. Thus, this study provides evidence that mucosal delivery of M2e5x VLP vaccine provides cross-protection by inducing humoral and cellular immune responses. [Mh] Termos MeSH primário: Proteção Cruzada Vírus da Influenza A Subtipo H3N2/imunologia Vírus da Influenza A Subtipo H5N1/imunologia Vacinas contra Influenza/administração & dosagem Vacinas de Partículas Semelhantes a Vírus/administração & dosagem Proteínas da Matriz Viral/imunologia [Mh] Termos MeSH secundário: Administração Intranasal Animais Anticorpos Antivirais/análise Anticorpos Antivirais/sangue Linfócitos B/imunologia Linfócitos T CD4-Positivos/imunologia Linfócitos T CD8-Positivos/imunologia Embrião de Galinha Feminino Pulmão/imunologia Pulmão/virologia Camundongos Endogâmicos BALB C Infecções por Orthomyxoviridae/imunologia Infecções por Orthomyxoviridae/prevenção & controle Infecções por Orthomyxoviridae/virologia Células Sf9 Spodoptera [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL [Nm] Nome de substância: 0 (Antibodies, Viral); 0 (Influenza Vaccines); 0 (Vaccines, Virus-Like Particle); 0 (Viral Matrix Proteins) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180206 [Lr] Data última revisão: 180206 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180112 [St] Status: MEDLINE [do] DOI: 10.1371/journal.pone.0190868

10 / 54677

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29357370 [Au] Autor: Sathe A; Chalaud G; Oppolzer I; Wong KY; von Busch M; Schmid SC; Tong Z; Retz M; Gschwend JE; Schulz WA; Nawroth R [Ad] Endereço: Department of Urology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. [Ti] Título: Parallel PI3K, AKT and mTOR inhibition is required to control feedback loops that limit tumor therapy. [So] Source: PLoS One;13(1):e0190854, 2018. [Is] ISSN: 1932-6203 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Targeting the PI3K pathway has achieved limited success in cancer therapy. One reason for the disappointing activity of drugs that interfere with molecules that are important player in this pathway is the induction of multiple feedback loops that have been only partially understood. To understand these limitations and develop improved treatment strategies, we comprehensively characterized molecular mechanisms of PI3K pathway signaling in bladder cancer cell lines upon using small molecule inhibitors and RNAi technologies against all key molecules and protein complexes within the pathway and analyzed functional and molecular consequences. When targeting either mTORC1, mTOR, AKT or PI3K, only S6K1 phosphorylation was affected in most cell lines examined. Dephosphorylation of 4E-BP1 required combined inhibition of PI3K and mTORC1, independent from AKT, and resulted in a robust reduction in cell viability. Long-term inhibition of PI3K however resulted in a PDK1-dependent, PIP3 and mTORC2 independent rephosphorylation of AKT. AKT rephosphorylation could also be induced by mTOR or PDK1 inhibition. Combining PI3K/mTOR inhibitors with AKT or PDK1 inhibitors suppressed this rephosphorylation, induced apoptosis, decreased colony formation, cell viability and growth of tumor xenografts. Our findings reveal novel molecular mechanisms that explain the requirement for simultaneous targeting of PI3K, AKT and mTORC1 to achieve effective tumor growth inhibition. [Mh] Termos MeSH primário: Antineoplásicos/administração & dosagem Inibidores Enzimáticos/administração & dosagem Fosfatidilinositol 3-Quinase/antagonistas & inibidores Inibidores de Proteínas Quinases/administração & dosagem Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores Serina-Treonina Quinases TOR/antagonistas & inibidores Neoplasias da Bexiga Urinária/tratamento farmacológico Neoplasias da Bexiga Urinária/metabolismo [Mh] Termos MeSH secundário: Proteínas Adaptadoras de Transdução de Sinal/metabolismo Animais Protocolos de Quimioterapia Combinada Antineoplásica Linhagem Celular Tumoral Sobrevivência Celular/efeitos dos fármacos Embrião de Galinha Retroalimentação Fisiológica/efeitos dos fármacos Compostos Heterocíclicos com 3 Anéis/administração & dosagem Seres Humanos Imidazóis/administração & dosagem Alvo Mecanístico do Complexo 1 de Rapamicina/antagonistas & inibidores Fosfoproteínas/metabolismo Fosforilação/efeitos dos fármacos Quinolinas/administração & dosagem Proteínas Quinases S6 Ribossômicas 70-kDa/metabolismo Transdução de Sinais/efeitos dos fármacos Neoplasias da Bexiga Urinária/patologia Ensaios Antitumorais Modelo de Xenoenxerto [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Adaptor Proteins, Signal Transducing); 0 (Antineoplastic Agents); 0 (EIF4EBP1 protein, human); 0 (Enzyme Inhibitors); 0 (Heterocyclic Compounds, 3-Ring); 0 (Imidazoles); 0 (MK 2206); 0 (Phosphoproteins); 0 (Protein Kinase Inhibitors); 0 (Quinolines); EC 2.7.1.1 (MTOR protein, human); EC 2.7.1.1 (TOR Serine-Threonine Kinases); EC 2.7.1.137 (Phosphatidylinositol 3-Kinase); EC 2.7.11.1 (Mechanistic Target of Rapamycin Complex 1); EC 2.7.11.1 (Proto-Oncogene Proteins c-akt); EC 2.7.11.1 (Ribosomal Protein S6 Kinases, 70-kDa); EC 2.7.11.1 (ribosomal protein S6 kinase, 70kD, polypeptide 1); RUJ6Z9Y0DT (dactolisib) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180206 [Lr] Data última revisão: 180206 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180123 [St] Status: MEDLINE [do] DOI: 10.1371/journal.pone.0190854

---

página 1 de 5468

ir para página

Refinar a pesquisa

Base de dados : MEDLINE

Formulário avançado

		Pesquisar	no campo
1			PalavrasDescritor de assuntoDescritor de assunto primárioLimitesAutorPalavras do títuloPalavras do resumoIdiomaPaís de publicaçãoNome de substânciaNome de pessoa como assuntoRevistaAssunto de RevistaISSNTipo de publicaçãoIdentificador únicoMês de entradaAno de publicaçãoTexto completoAtualização por classeCategoria DeCSCategoria DeCS explodidaCategoria CID-10SubSetsPais de AfiliaçãoAfiliaçãoAfiliação 2
2	and or and not		PalavrasDescritor de assuntoDescritor de assunto primárioLimitesAutorPalavras do títuloPalavras do resumoIdiomaPaís de publicaçãoNome de substânciaNome de pessoa como assuntoRevistaAssunto de RevistaISSNTipo de publicaçãoIdentificador únicoMês de entradaAno de publicaçãoTexto completoAtualização por classeCategoria DeCSCategoria DeCS explodidaCategoria CID-10SubSetsPais de AfiliaçãoAfiliaçãoAfiliação 2
3	and or and not		PalavrasDescritor de assuntoDescritor de assunto primárioLimitesAutorPalavras do títuloPalavras do resumoIdiomaPaís de publicaçãoNome de substânciaNome de pessoa como assuntoRevistaAssunto de RevistaISSNTipo de publicaçãoIdentificador únicoMês de entradaAno de publicaçãoTexto completoAtualização por classeCategoria DeCSCategoria DeCS explodidaCategoria CID-10SubSetsPais de AfiliaçãoAfiliaçãoAfiliação 2

Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde