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[PMID]: 29320816 [Au] Autor: Ismail HAHA; Kang BH; Kim JS; Lee JH; Choi IW; Cha GH; Yuk JM; Lee YH [Ad] Endereço: Department of Infection Biology, Chungnam National University School of Medicine, Daejeon 34134, Korea. [Ti] Título: IL-12 and IL-23 Production in Toxoplasma gondii- or LPS-Treated Jurkat T Cells via PI3K and MAPK Signaling Pathways. [So] Source: Korean J Parasitol;55(6):613-622, 2017 Dec. [Is] ISSN: 1738-0006 [Cp] País de publicação: Korea (South) [La] Idioma: eng [Ab] Resumo: IL-12 and IL-23 are closely related in structure, and have been shown to play crucial roles in regulation of immune responses. However, little is known about the regulation of these cytokines in T cells. Here, we investigated the roles of PI3K and MAPK pathways in IL-12 and IL-23 production in human Jurkat T cells in response to Toxoplasma gondii and LPS. IL-12 and IL-23 production was significantly increased in T cells after stimulation with T. gondii or LPS. T. gondii and LPS increased the phosphorylation of AKT, ERK1/2, p38 MAPK, and JNK1/2 in T cells from 10 min post-stimulation, and peaked at 30-60 min. Inhibition of the PI3K pathway reduced IL-12 and IL-23 production in T. gondii-infected cells, but increased in LPS-stimulated cells. IL-12 and IL-23 production was significantly reduced by ERK1/2 and p38 MAPK inhibitors in T. gondii- and LPS-stimulated cells, but not in cells treated with a JNK1/2 inhibitor. Collectively, IL-12 and IL-23 production was positively regulated by PI3K and JNK1/2 in T. gondii-infected Jurkat cells, but negatively regulated in LPS-stimulated cells. And ERK1/2 and p38 MAPK positively regulated IL-12 and IL-23 production in Jurkat T cells. These data indicate that T. gondii and LPS induced IL-12 and IL-23 production in Jurkat T cells through the regulation of the PI3K and MAPK pathways; however, the mechanism underlying the stimulation of IL-12 and IL-23 production by T. gondii in Jurkat T cells is different from that of LPS. [Mh] Termos MeSH primário: Interleucina-12/metabolismo Interleucina-23/metabolismo Lipopolissacarídeos/imunologia Sistema de Sinalização das MAP Quinases/imunologia Sistema de Sinalização das MAP Quinases/fisiologia Fosfatidilinositol 3-Quinases/imunologia Fosfatidilinositol 3-Quinases/fisiologia Toxoplasma/imunologia [Mh] Termos MeSH secundário: Células Cultivadas Seres Humanos Células Jurkat Proteína Quinase 3 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/fisiologia Proteína Quinase 8 Ativada por Mitógeno/metabolismo Proteína Quinase 8 Ativada por Mitógeno/fisiologia Proteína Quinase 9 Ativada por Mitógeno/metabolismo Proteína Quinase 9 Ativada por Mitógeno/fisiologia Fosforilação Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo Proteínas Quinases p38 Ativadas por Mitógeno/fisiologia [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Interleukin-23); 0 (Lipopolysaccharides); 187348-17-0 (Interleukin-12); EC 2.7.1.- (Phosphatidylinositol 3-Kinases); EC 2.7.1.24 (Mitogen-Activated Protein Kinase 9); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 8); EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) [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: 180112 [St] Status: MEDLINE [do] DOI: 10.3347/kjp.2017.55.6.613

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[PMID]: 28469997 [Au] Autor: Zhao M; Zhang L; Lv S; Zhang C; Wang L; Chen H; Zhou Y; Lou J [Ad] Endereço: Department of Laboratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong UniversityShanghai, China. [Ti] Título: IQGAP1 Mediates Hcp1-Promoted Meningitis by Stimulating the MAPK Pathway. [So] Source: Front Cell Infect Microbiol;7:132, 2017. [Is] ISSN: 2235-2988 [Cp] País de publicação: Switzerland [La] Idioma: eng [Ab] Resumo: -induced meningitis remains a life-threatening disease despite recent advances in the field of antibiotics-based therapeutics, necessitating continued research on its pathogenesis. The current study aims to elucidate the mechanism through which hemolysin-coregulated protein 1 (Hcp1) induces the apoptosis of human brain microvascular endothelial cells (HBMEC). Co-immunoprecipitation coupled with mass spectrometric (MS) characterization led to the identification of IQ motif containing GTPase activating protein 1 (IQGAP1) as a downstream target of Hcp1. IQGAP1 was found to be up-regulated by Hcp1 treatment and mediate the stimulation of HBMEC apoptosis. It was shown that Hcp1 could compete against Smurf1 for binding to IQGAP1, thereby rescuing the latter from ubiquitin-dependent degradation. Subsequent study suggested that IQGAP1 could stimulate the MAPK signaling pathway by promoting the phosphorylation of ERK1/2, an effect that was blocked by U0126, an MAPK inhibitor. Furthermore, U0126 also demonstrated therapeutic potential against meningitis in a mouse model. Taken together, our results suggested the feasibility of targeting the MAPK pathway as a putative therapeutic strategy against bacterial meningitis. [Mh] Termos MeSH primário: Proteínas de Escherichia coli/farmacologia Escherichia coli/metabolismo Meningite devida a Escherichia coli/metabolismo Quinases de Proteína Quinase Ativadas por Mitógeno/metabolismo Fatores de Virulência/farmacologia Proteínas Ativadoras de ras GTPase/efeitos dos fármacos [Mh] Termos MeSH secundário: Animais Apoptose/efeitos dos fármacos Encéfalo Butadienos/antagonistas & inibidores Linhagem Celular Citocinas/análise Modelos Animais de Doenças Células Endoteliais/efeitos dos fármacos Seres Humanos Meningite devida a Escherichia coli/tratamento farmacológico Camundongos Camundongos Endogâmicos C57BL Proteína Quinase 3 Ativada por Mitógeno/metabolismo Nitrilos/antagonistas & inibidores Fosforilação RNA Interferente Pequeno Transdução de Sinais Ubiquitina-Proteína Ligases Regulação para Cima [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Butadienes); 0 (Cytokines); 0 (Escherichia coli Proteins); 0 (HCP1 protein, E coli); 0 (IQ motif containing GTPase activating protein 1); 0 (Nitriles); 0 (RNA, Small Interfering); 0 (U 0126); 0 (Virulence Factors); 0 (ras GTPase-Activating Proteins); EC 2.3.2.26 (SMURF1 protein, human); EC 2.3.2.27 (Ubiquitin-Protein Ligases); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3); EC 2.7.12.2 (Mitogen-Activated Protein Kinase Kinases) [Em] Mês de entrada: 1712 [Cu] Atualização por classe: 180216 [Lr] Data última revisão: 180216 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170505 [St] Status: MEDLINE [do] DOI: 10.3389/fcimb.2017.00132

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[PMID]: 29331377 [Au] Autor: Jeong WY; Yoo HY; Kim CW [Ad] Endereço: Department of Biotechnology, BK21 Plus Program, College of Life Sciences and Biotechnology, Korea University, 1-5, Anam Dong, Seongbuk-Gu, Seoul 136-701, South Korea. [Ti] Título: ß-cellulin promotes the proliferation of corneal epithelial stem cells through the phosphorylation of erk1/2. [So] Source: Biochem Biophys Res Commun;496(2):359-366, 2018 02 05. [Is] ISSN: 1090-2104 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: The proliferation of corneal epithelial stem cells (CESCs) is a very important process in the recovery of corneal wounds. Recent studies have shown that ß-cellulin (BC) is effective in the repair of other tissues. However, its mechanism of action in corneal wound healing is not yet clear. The purpose of this study was to investigate how BC accelerates wound healing of the cornea. Here, we confirmed that the proliferation of CESCs was induced at a specific concentration (0.2, 2 and 20 ng/mL) by treatment with BC. Markers associated with proliferation activity (ΔNp63, bmi-1, abcg2) were also upregulated. In vivo experiments showed that the corneal wound healing rate was increased in mice. We found that BC stimulates the phosphorylation of the erk1/2 signaling pathway, which is triggered during the recovery of mouse corneal wounds. However, the inhibition of erk1/2 phosphorylation delayed the recovery of mouse corneal wounds in an organ culture assay. According to these results, BC may be a potential treatment factor for corneal wound healing. [Mh] Termos MeSH primário: Betacelulina/farmacologia Células Epiteliais/efeitos dos fármacos Epitélio Anterior/efeitos dos fármacos Proteína Quinase 1 Ativada por Mitógeno/genética Proteína Quinase 3 Ativada por Mitógeno/genética Células-Tronco/efeitos dos fármacos [Mh] Termos MeSH secundário: Membro 2 da Subfamília G de Transportadores de Cassetes de Ligação de ATP/genética Membro 2 da Subfamília G de Transportadores de Cassetes de Ligação de ATP/metabolismo Animais Movimento Celular/efeitos dos fármacos Proliferação Celular/efeitos dos fármacos Células Epiteliais/metabolismo Células Epiteliais/patologia Epitélio Anterior/lesões Epitélio Anterior/metabolismo Regulação da Expressão Gênica Camundongos Camundongos Endogâmicos BALB C Proteína Quinase 1 Ativada por Mitógeno/antagonistas & inibidores Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/antagonistas & inibidores Proteína Quinase 3 Ativada por Mitógeno/metabolismo Técnicas de Cultura de Órgãos Fosfoproteínas/genética Fosfoproteínas/metabolismo Fosforilação/efeitos dos fármacos Complexo Repressor Polycomb 1/genética Complexo Repressor Polycomb 1/metabolismo Inibidores de Proteínas Quinases/farmacologia Proteínas Proto-Oncogênicas/genética Proteínas Proto-Oncogênicas/metabolismo Células-Tronco/metabolismo Células-Tronco/patologia Transativadores/genética Transativadores/metabolismo Cicatrização/efeitos dos fármacos Cicatrização/genética [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (ATP Binding Cassette Transporter, Sub-Family G, Member 2); 0 (Abcg2 protein, mouse); 0 (Betacellulin); 0 (Bmi1 protein, mouse); 0 (Btc protein, mouse); 0 (Phosphoproteins); 0 (Protein Kinase Inhibitors); 0 (Proto-Oncogene Proteins); 0 (Trans-Activators); 0 (Trp63 protein, mouse); EC 2.3.2.27 (Polycomb Repressive Complex 1); EC 2.7.11.24 (Mapk1 protein, mouse); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180214 [Lr] Data última revisão: 180214 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180115 [St] Status: MEDLINE

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[PMID]: 29307828 [Au] Autor: Wang X; Min S; Xie F; Yang J; Li L; Chen J [Ad] Endereço: Department of Anesthesiology, First Affiliated Hospital of Chongqing Medical University, Chongqing, China. [Ti] Título: Glial cell-derived neurotrophic factor alleviates sepsis-induced neuromuscular dysfunction by decreasing the expression of γ- and α7-nicotinic acetylcholine receptors in an experimental rat model of neuromyopathy. [So] Source: Biochem Biophys Res Commun;496(2):260-266, 2018 02 05. [Is] ISSN: 1090-2104 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Sepsis-induced neuromuscular dysfunction results from up-regulation of the expression of γ- and α7-nicotinic acetylcholine receptors (nAChR). Although glial cell derived neurotrophic factor (GDNF) has been implicated in repairing and supporting neurons, little is known about the effects of GDNF on demyelination of nerves in sepsis. In this study, we tested the hypothesis that GDNF could alleviate sepsis-induced neuromuscular dysfunction by decreasing the expression of γ- and α7-nAChR in an experimental rat model of neuromyopathy. Rats were randomly divided into a sham group and a sepsis group. Levels of inflammatory factors, muscle function, and nicotinic acetylcholine receptors were tested in rats after cecal ligation and puncture (CLP). At 24 h after CLP, GDNF was injected around the sciatic nerve of sepsis rats, cytokines were detected by enzyme-linked immunosorbent assay (ELISA), and immunofluorescence staining was used to detect the expression of nAChRs. GDNF and its downstream effector (Erk1/2 and GFR-α), neuregulin-1 (NRG-1) and γ- and α7-nAChR were measured using Western blot analysis. The expression of GDNF reached a minimum at 24 h after CLP. Compared with the sham group, the release of cytokines and the expression of γ- and α7-nAChR were significantly increased in the sepsis group. The administration of GDNF significantly alleviated sepsis-induced neuromuscular dysfunction, as well as reducing the expression of γ- and α7-nAChR. In addition, the expression of Erk1/2, GFR-α, NRG-1 were significantly increased after GDNF treatment. GDNF administration may improve patient outcomes by reducing the demyelination of nerves and the expression of γ- and α7-nAChR. [Mh] Termos MeSH primário: Anti-Inflamatórios/farmacologia Doenças Desmielinizantes/tratamento farmacológico Fator Neurotrófico Derivado de Linhagem de Célula Glial/farmacologia Doenças Musculares/tratamento farmacológico Fármacos Neuroprotetores/farmacologia Sepse/tratamento farmacológico Receptor Nicotínico de Acetilcolina alfa7/genética [Mh] Termos MeSH secundário: Animais Citocinas/genética Citocinas/metabolismo Doenças Desmielinizantes/genética Doenças Desmielinizantes/metabolismo Doenças Desmielinizantes/patologia Modelos Animais de Doenças Regulação da Expressão Gênica Fatores de Troca do Nucleotídeo Guanina/genética Fatores de Troca do Nucleotídeo Guanina/metabolismo Masculino Proteína Quinase 1 Ativada por Mitógeno/genética Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/genética Proteína Quinase 3 Ativada por Mitógeno/metabolismo Doenças Musculares/genética Doenças Musculares/metabolismo Doenças Musculares/patologia Neuregulina-1/genética Neuregulina-1/metabolismo Junção Neuromuscular/efeitos dos fármacos Junção Neuromuscular/metabolismo Junção Neuromuscular/patologia Isoformas de Proteínas/antagonistas & inibidores Isoformas de Proteínas/genética Isoformas de Proteínas/metabolismo Ratos Ratos Sprague-Dawley Nervo Isquiático/efeitos dos fármacos Nervo Isquiático/metabolismo Nervo Isquiático/patologia Sepse/genética Sepse/metabolismo Sepse/patologia Transdução de Sinais Receptor Nicotínico de Acetilcolina alfa7/antagonistas & inibidores Receptor Nicotínico de Acetilcolina alfa7/metabolismo [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Anti-Inflammatory Agents); 0 (Cytokines); 0 (Glial Cell Line-Derived Neurotrophic Factor); 0 (Guanine Nucleotide Exchange Factors); 0 (Neuregulin-1); 0 (Neuroprotective Agents); 0 (Nrg1 protein, rat); 0 (Protein Isoforms); 0 (alpha7 Nicotinic Acetylcholine Receptor); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180214 [Lr] Data última revisão: 180214 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180109 [St] Status: MEDLINE

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[PMID]: 28471452 [Au] Autor: Chowdhury SR; Ray U; Chatterjee BP; Roy SS [Ad] Endereço: Cell Biology and Physiology Division, CSIR-Indian Institute of Chemical Biology, Council of Scientific and Industrial Research, Kolkata, India. [Ti] Título: Targeted apoptosis in ovarian cancer cells through mitochondrial dysfunction in response to Sambucus nigra agglutinin. [So] Source: Cell Death Dis;8(5):e2762, 2017 May 04. [Is] ISSN: 2041-4889 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: Ovarian carcinoma (OC) patients encounter the severe challenge of clinical management owing to lack of screening measures, chemoresistance and finally dearth of non-toxic therapeutics. Cancer cells deploy various defense strategies to sustain the tumor microenvironment, among which deregulated apoptosis remains a versatile promoter of cancer progression. Although recent research has focused on identifying agents capable of inducing apoptosis in cancer cells, yet molecules efficiently breaching their survival advantage are yet to be classified. Here we identify lectin, Sambucus nigra agglutinin (SNA) to exhibit selectivity towards identifying OC by virtue of its specific recognition of α-2, 6-linked sialic acids. Superficial binding of SNA to the OC cells confirm the hyper-sialylated status of the disease. Further, SNA activates the signaling pathways of AKT and ERK1/2, which eventually promotes de-phosphorylation of dynamin-related protein-1 (Drp-1). Upon its translocation to the mitochondrial fission loci Drp-1 mediates the central role of switch in the mitochondrial phenotype to attain fragmented morphology. We confirmed mitochondrial outer membrane permeabilization resulting in ROS generation and cytochrome-c release into the cytosol. SNA response resulted in an allied shift of the bioenergetics profile from Warburg phenotype to elevated mitochondrial oxidative phosphorylation, altogether highlighting the involvement of mitochondrial dysfunction in restraining cancer progression. Inability to replenish the SNA-induced energy crunch of the proliferating cancer cells on the event of perturbed respiratory outcome resulted in cell cycle arrest before G2/M phase. Our findings position SNA at a crucial juncture where it proves to be a promising candidate for impeding progression of OC. Altogether we unveil the novel aspect of identifying natural molecules harboring the inherent capability of targeting mitochondrial structural dynamics, to hold the future for developing non-toxic therapeutics for treating OC. [Mh] Termos MeSH primário: Apoptose/efeitos dos fármacos Mitocôndrias/metabolismo Dinâmica Mitocondrial/efeitos dos fármacos Lectinas de Plantas/farmacologia Proteínas Inativadoras de Ribossomos/farmacologia [Mh] Termos MeSH secundário: Sobrevivência Celular/efeitos dos fármacos Citocromos c/metabolismo Citosol/metabolismo Feminino GTP Fosfo-Hidrolases/metabolismo Seres Humanos Potencial da Membrana Mitocondrial/efeitos dos fármacos Microscopia Confocal Proteínas Associadas aos Microtúbulos/metabolismo Proteínas Mitocondriais/metabolismo Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/metabolismo Neoplasias Ovarianas/metabolismo Neoplasias Ovarianas/patologia Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores Proteínas Proto-Oncogênicas c-akt/metabolismo Espécies Reativas de Oxigênio/metabolismo Pontos de Checagem da Fase S do Ciclo Celular/efeitos dos fármacos Transdução de Sinais/efeitos dos fármacos [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Microtubule-Associated Proteins); 0 (Mitochondrial Proteins); 0 (Plant Lectins); 0 (Reactive Oxygen Species); 0 (Sambucus nigra lectins); 9007-43-6 (Cytochromes c); EC 2.7.11.1 (Proto-Oncogene Proteins c-akt); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3); EC 3.2.2.22 (Ribosome Inactivating Proteins); EC 3.6.1.- (GTP Phosphohydrolases); EC 3.6.5.5 (DNM1L protein, human) [Em] Mês de entrada: 1801 [Cu] Atualização por classe: 180129 [Lr] Data última revisão: 180129 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170505 [St] Status: MEDLINE [do] DOI: 10.1038/cddis.2017.77

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[PMID]: 28452938 [Au] Autor: Casarini L; Riccetti L; De Pascali F; Gilioli L; Marino M; Vecchi E; Morini D; Nicoli A; La Sala GB; Simoni M [Ad] Endereço: Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, NOCSAE, via P. Giardini 1355, 41126 Modena, Italy. livio.casarini@unimore.it. [Ti] Título: Estrogen Modulates Specific Life and Death Signals Induced by LH and hCG in Human Primary Granulosa Cells In Vitro. [So] Source: Int J Mol Sci;18(5), 2017 Apr 28. [Is] ISSN: 1422-0067 [Cp] País de publicação: Switzerland [La] Idioma: eng [Ab] Resumo: Luteinizing hormone (LH) and human chorionic gonadotropin (hCG) are glycoprotein hormones used for assisted reproduction acting on the same receptor (LHCGR) and mediating different intracellular signaling. We evaluated the pro- and anti-apoptotic effect of 100 pM LH or hCG, in the presence or in the absence of 200 pg/mL 17ß-estradiol, in long-term, serum-starved human primary granulosa cells (hGLC) and a transfected granulosa cell line overexpressing LHCGR (hGL5/LHCGR). To this purpose, phospho-extracellular-regulated kinase 1/2 (pERK1/2), protein kinase B (pAKT), cAMP-responsive element binding protein (pCREB) activation and procaspase 3 cleavage were evaluated over three days by Western blotting, along with the expression of target genes by real-time PCR and cell viability by colorimetric assay. We found that LH induced predominant pERK1/2 and pAKT activation , and anti-apoptotic gene expression, while hCG mediated more potent CREB phosphorylation, expression of and procaspase 3 cleavage than LH. Cell treatment by LH is accompanied by increased (serum-starved) cell viability, while hCG decreased the number of viable cells. The hCG-specific, pro-apoptotic effect was blocked by a physiological dose of 17ß-estradiol, resulting in pAKT activation, lack of procaspase 3 cleavage and increased cell viability. These results confirm that relatively high levels of steroidogenic pathway activation are linked to pro-apoptotic signals in vitro, which may be counteracted by other factors, i.e., estrogens. [Mh] Termos MeSH primário: Gonadotropina Coriônica/farmacologia Estradiol/farmacologia Hormônio Luteinizante/farmacologia Transdução de Sinais/efeitos dos fármacos [Mh] Termos MeSH secundário: Aromatase/metabolismo Proteína de Ligação a CREB/metabolismo Caspase 3/genética Caspase 3/metabolismo Sobrevivência Celular/efeitos dos fármacos Células Cultivadas Feminino Expressão Gênica/efeitos dos fármacos Células da Granulosa/citologia Células da Granulosa/efeitos dos fármacos Células da Granulosa/metabolismo Seres Humanos Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/metabolismo Fosforilação/efeitos dos fármacos Proteínas Proto-Oncogênicas c-akt/metabolismo Proteína Supressora de Tumor p53/genética Proteína Supressora de Tumor p53/metabolismo [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Chorionic Gonadotropin); 0 (Tumor Suppressor Protein p53); 4TI98Z838E (Estradiol); 9002-67-9 (Luteinizing Hormone); EC 1.14.14.1 (Aromatase); EC 1.14.14.1 (CYP19A1 protein, human); EC 2.3.1.48 (CREB-Binding Protein); EC 2.7.11.1 (Proto-Oncogene Proteins c-akt); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3); EC 3.4.22.- (Caspase 3) [Em] Mês de entrada: 1801 [Cu] Atualização por classe: 180122 [Lr] Data última revisão: 180122 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170429 [St] Status: MEDLINE

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[PMID]: 28448446 [Au] Autor: Wu Y; Wang L; Deng D; Zhang Q; Liu W [Ad] Endereço: Department of Nephrology, Affiliated Beijing Friendship Hospital, Faculty of Kidney Diseases, Capital Medical University, No. 95 Yong An Road, Xi Cheng District, Beijing 100050, China. wyryyyy@163.com. [Ti] Título: Renalase Protects against Renal Fibrosis by Inhibiting the Activation of the ERK Signaling Pathways. [So] Source: Int J Mol Sci;18(5), 2017 Apr 27. [Is] ISSN: 1422-0067 [Cp] País de publicação: Switzerland [La] Idioma: eng [Ab] Resumo: Renal interstitial fibrosis is a common pathway for the progression of chronic kidney disease (CKD) to end-stage renal disease. Renalase, acting as a signaling molecule, has been reported to have cardiovascular and renal protective effects. However, its role in renal fibrosis remains unknown. In this study, we evaluated the therapeutic efficacy of renalase in rats with complete unilateral ureteral obstruction (UUO) and examined the inhibitory effects of renalase on transforming growth factor-ß1 (TGF-ß1)-induced epithelial-mesenchymal transition (EMT) in human proximal renal tubular epithelial (HK-2) cells. We found that in the UUO model, the expression of renalase was markedly downregulated and adenoviral-mediated expression of renalase significantly attenuated renal interstitial fibrosis, as evidenced by the maintenance of E-cadherin expression and suppressed expression of α-smooth muscle actin (α-SMA), fibronectin and collagen-I. In vitro, renalase inhibited TGF-ß1-mediated upregulation of α-SMA and downregulation of E-cadherin. Increased levels of Phospho-extracellular regulated protein kinases (p-ERK1/2) in TGF-ß1-stimulated cells were reversed by renalase cotreatment. When ERK1 was overexpressed, the inhibition of TGF-ß1-induced EMT and fibrosis mediated by renalase was attenuated. Our study provides the first evidence that renalase can ameliorate renal interstitial fibrosis by suppression of tubular EMT through inhibition of the ERK pathway. These results suggest that renalase has potential renoprotective effects in renal interstitial fibrosis and may be an effective agent for slowing CKD progression. [Mh] Termos MeSH primário: Sistema de Sinalização das MAP Quinases/fisiologia Monoaminoxidase/metabolismo [Mh] Termos MeSH secundário: Adenoviridae/genética Animais Linhagem Celular Modelos Animais de Doenças Regulação para Baixo Transição Epitelial-Mesenquimal/efeitos dos fármacos Fibronectinas/metabolismo Fibrose/fisiopatologia Vetores Genéticos/genética Vetores Genéticos/metabolismo Seres Humanos Nefropatias/etiologia Nefropatias/metabolismo Nefropatias/patologia Masculino Proteína Quinase 1 Ativada por Mitógeno/genética Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/genética Proteína Quinase 3 Ativada por Mitógeno/metabolismo Monoaminoxidase/sangue Monoaminoxidase/genética Ratos Ratos Sprague-Dawley Fator de Crescimento Transformador beta1/farmacologia Regulação para Cima Obstrução Ureteral/complicações Obstrução Ureteral/metabolismo Obstrução Ureteral/patologia [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Fibronectins); 0 (Transforming Growth Factor beta1); EC 1.4.3.4 (Monoamine Oxidase); EC 1.4.3.4. (renalase); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) [Em] Mês de entrada: 1801 [Cu] Atualização por classe: 180122 [Lr] Data última revisão: 180122 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170428 [St] Status: MEDLINE

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[PMID]: 29197866 [Au] Autor: Li Z; Wang Z; Xu S; Liang W; Fan W [Ti] Título: Proteomic Analysis Reveals a New Benefit of Periodic Mechanical Stress on Chondrocytes. [So] Source: Cell Physiol Biochem;44(4):1578-1590, 2017. [Is] ISSN: 1421-9778 [Cp] País de publicação: Switzerland [La] Idioma: eng [Ab] Resumo: BACKGROUND/AIMS: In recent years, a variety of studies have been performed to investigate the cellular responses of periodic mechanical stress. In our previous studies, we found that periodic mechanical stress can promote proliferation and matrix synthesis through the integrin beta 1-mediated ERK1/2 pathway, and we used proteomic analysis to detect quantitative changes in chondrocytes under periodic mechanical stress. Despite these results, the effects and mechanisms of periodic mechanical stress are still not fully understood, so in this study we extended our study using phosphoproteomic techniques. METHODS: We used phosphoproteomic techniques to detect phosphorylation changes in chondrocytes under periodic mechanical stress and combined the results with the quantitative proteomic data to further explore the underlying mechanisms. Data were obtained by phosphorylation inhibition, quantitative real-time PCR (qPCR) analysis, western blot analysis and immunofluorescence assay. RESULTS: From phosphoproteomic analysis, a total of 1073 phosphorylated proteins and 2054 phosphopeptides were identified. The number of significant differentially expressed proteins and phosphopeptides was 97 and 108, respectively (ratio >1.20 or <0.83 at p<0.05). Periodic mechanical stress increased glycogen synthase kinase 3-beta (GSK3-beta) phosphorylation at Y216, promoted the phosphorylation of beta-catenin, decreased beta-catenin levels and suppressed the expression of type I collagen. In contrast, inhibition of GSK3-beta by TWS119, which specifically inhibits the phosphorylation of Y216, suppressed the phosphorylation of beta-catenin, which resulted in the accumulation of beta-catenin and an increase in the expression of type I collagen. CONCLUSIONS: We successfully constructed differentially expressed phosphoproteomic profiles of rat chondrocytes under periodic mechanical stress, and discovered a potential new therapeutic benefit in which periodic mechanical stress suppressed the formation of type I collagen in the matrix of chondrocytes via phosphorylation of GSK3-beta and beta-catenin. [Mh] Termos MeSH primário: Condrócitos/metabolismo Fosfopeptídeos/análise Proteômica Estresse Mecânico [Mh] Termos MeSH secundário: Animais Cartilagem Articular/citologia Células Cultivadas Condrócitos/citologia Cromatografia Líquida de Alta Pressão Colágeno Tipo I/metabolismo Glicogênio Sintase Quinase 3 beta/metabolismo Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/metabolismo Fosforilação Mapas de Interação de Proteínas Ratos Ratos Sprague-Dawley Espectrometria de Massas em Tandem beta Catenina/metabolismo [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Collagen Type I); 0 (Phosphopeptides); 0 (beta Catenin); EC 2.7.11.1 (Glycogen Synthase Kinase 3 beta); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) [Em] Mês de entrada: 1801 [Cu] Atualização por classe: 180118 [Lr] Data última revisão: 180118 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171204 [St] Status: MEDLINE [do] DOI: 10.1159/000485652

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MEDLINE

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[PMID]: 29197863 [Au] Autor: Xu S; Li Z; Wang Z; Zhai C; Liang W; Zhu C; Fan W [Ti] Título: Proteomic Analysis Reveals Grb2 as a Key Regulator of Periodic Mechanical Stress Transduction in Chondrocytes. [So] Source: Cell Physiol Biochem;44(4):1509-1525, 2017. [Is] ISSN: 1421-9778 [Cp] País de publicação: Switzerland [La] Idioma: eng [Ab] Resumo: BACKGROUND/AIMS: Periodic mechanical stress could significantly promote chondrocyte proliferation and matrix synthesis. However, the mechanisms underlying the ability of chondrocyte detecting and responding to periodic mechanical stimuli have not been well delineated. METHODS: Quantitative proteomic analysis was performed to construct the differently expressed proteome profiles of chondrocyte under pressure. Then a combination of Western blot, quantitative real-time PCR, lentiviral vector and histological methods were used to confirm the proteomic results and investigate the mechanoseing mechanism. RESULTS: Growth factor receptor-bound protein 2 (Grb2), a component of integrin adhesome, was found a 1.49-fold increase in dynamic stress group. This process was mediated through integrin ß1, leading to increased phosphorylation of focal adhesion kinase (FAK) and extracellular signal-regulated kinase 1/2 (ERK1/2) respectively and then produce the corresponding biological effects. CONCLUSION: This was the first time to demonstrate Grb2 has such an important role in periodic mechanotransduction, and the proteomic data could facilitate the further investigation of chondrocytes mechanosensing. [Mh] Termos MeSH primário: Proteína Adaptadora GRB2/metabolismo Proteômica Estresse Mecânico [Mh] Termos MeSH secundário: Agrecanas/genética Agrecanas/metabolismo Animais Células Cultivadas Condrócitos/citologia Condrócitos/metabolismo Cromatografia Líquida de Alta Pressão Colágeno Tipo II/genética Colágeno Tipo II/metabolismo Proteína-Tirosina Quinases de Adesão Focal/genética Proteína-Tirosina Quinases de Adesão Focal/metabolismo Proteína Adaptadora GRB2/antagonistas & inibidores Proteína Adaptadora GRB2/genética Imuno-Histoquímica Proteína Quinase 1 Ativada por Mitógeno/genética Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/genética Proteína Quinase 3 Ativada por Mitógeno/metabolismo Fosforilação Interferência de RNA RNA Interferente Pequeno/metabolismo Ratos Ratos Sprague-Dawley Reação em Cadeia da Polimerase em Tempo Real Espectrometria de Massas por Ionização por Electrospray Engenharia Tecidual Regulação para Cima [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Aggrecans); 0 (Collagen Type II); 0 (GRB2 Adaptor Protein); 0 (Grb2 protein, rat); 0 (RNA, Small Interfering); EC 2.7.10.2 (Focal Adhesion Protein-Tyrosine Kinases); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) [Em] Mês de entrada: 1801 [Cu] Atualização por classe: 180118 [Lr] Data última revisão: 180118 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171204 [St] Status: MEDLINE [do] DOI: 10.1159/000485646

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[PMID]: 29179217 [Au] Autor: Rozentsvit A; Vinokur K; Samuel S; Li Y; Gerdes AM; Carrillo-Sepulveda MA [Ad] Endereço: Department of Biomedical Sciences, New York Institute of Technology, College of Osteopathic Medicine, Old Westbury, New York, USA. [Ti] Título: Ellagic Acid Reduces High Glucose-Induced Vascular Oxidative Stress Through ERK1/2/NOX4 Signaling Pathway. [So] Source: Cell Physiol Biochem;44(3):1174-1187, 2017. [Is] ISSN: 1421-9778 [Cp] País de publicação: Switzerland [La] Idioma: eng [Ab] Resumo: BACKGROUND/AIMS: Elevated production of reactive oxygen species (ROS) is linked to endothelial dysfunction and is one of the key contributors to the pathogenesis of diabetic vascular complications. Emerging evidence has indicated that ellagic acid (EA), a polyphenol found in fruits and nuts, possesses numerous biological activities including radical scavenging. However, whether EA exerts a vasculo-protective effect via antioxidant mechanisms in blood vessels exposed to diabetic conditions remains unknown. Accordingly, the goal of this current study was to determine whether EA decreases vascular ROS production and thus ameliorates endothelial dysfunction in the diabetic milieu. METHODS: Intact rat aortas and human aortic endothelial cells (HAEC) were stimulated with 30mM high glucose (HG) with and without EA co-treatment. Endothelium-dependent vasodilation was measured using a wire myograph. Gene and protein expression of non-phagocytic nicotinamide adenine dinucleotide phosphate (NADPH) oxidases 4 (NOX4) were detected using RT-PCR and western blotting, respectively. Oxidative stress was determined by measuring ROS levels using dihydroethidium (DHE) staining. RESULTS: Intact aortas exposed to HG condition displayed exacerbated ROS production and impairment of endothelium-dependent vasodilation, characterizing endothelial dysfunction. These effects were markedly reduced with EA treatment. HG enhanced ROS production in HAEC, paralleled by increased ERK1/2 activation and NOX4 expression. EA treatment blunted the increase of ROS generation, ERK1/2 activation and decreased NOX4. CONCLUSIONS: EA significantly decreases endothelial ROS levels and ameliorates the impairment of vascular relaxation induced by HG. Our results suggest that EA exerts a vasculo-protective effect under diabetic conditions via an antioxidant effect that involves inhibition of ERK1/2 and downregulation of NOX4. [Mh] Termos MeSH primário: Aorta/efeitos dos fármacos Ácido Elágico/farmacologia Glucose/toxicidade Estresse Oxidativo/efeitos dos fármacos Transdução de Sinais/efeitos dos fármacos [Mh] Termos MeSH secundário: Animais Aorta/citologia Aorta/metabolismo Linhagem Celular Ciclo-Oxigenase 2/metabolismo Células Endoteliais/citologia Células Endoteliais/efeitos dos fármacos Células Endoteliais/metabolismo Seres Humanos Técnicas In Vitro Masculino Proteína Quinase 1 Ativada por Mitógeno/metabolismo Proteína Quinase 3 Ativada por Mitógeno/metabolismo NADPH Oxidase 4/metabolismo Ratos Ratos Sprague-Dawley Espécies Reativas de Oxigênio/metabolismo Vasodilatação/efeitos dos fármacos [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Reactive Oxygen Species); 19YRN3ZS9P (Ellagic Acid); EC 1.14.99.1 (Cyclooxygenase 2); EC 1.6.3.- (NADPH Oxidase 4); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1); EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3); IY9XDZ35W2 (Glucose) [Em] Mês de entrada: 1801 [Cu] Atualização por classe: 180118 [Lr] Data última revisão: 180118 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171128 [St] Status: MEDLINE [do] DOI: 10.1159/000485448

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