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| Registros recuperados: 12 | |
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| Finatto,Taciane; Viana,Vívian Ebeling; Woyann,Leomar Guilherme; Busanello,Carlos; Maia,Luciano Carlos da; Oliveira,Antonio Costa de. |
| Abstract WRKY transcription factors (TFs) are responsible for the regulation of genes responsive to many plant growth and developmental cues, as well as to biotic and abiotic stresses. The modulation of gene expression by WRKY proteins primarily occurs by DNA binding at specific cis-regulatory elements, the W-box elements, which are short sequences located in the promoter region of certain genes. In addition, their action can occur through interaction with other TFs and the cellular transcription machinery. The current genome sequences available reveal a relatively large number of WRKY genes, reaching hundreds of copies. Recently, functional genomics studies in model plants have enabled the identification of function and mechanism of action of several WRKY... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transcriptional regulation; Signaling; Abscisic acid; Kinases; Stresses. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000400533 |
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| Cheng,Daojun; Meng,Meng; Peng,Jian; Qian,Wenliang; Kang,Lixia; Xia,Qingyou. |
| Juvenile hormone (JH) contributes to the regulation of larval molting and metamorphosis in insects. Herein, we comprehensively identified 55 genes involved in JH biosynthesis, metabolism and signaling in the silkworm (Bombyx mori) as well as 35 in Drosophila melanogaster, 35 in Anopheles gambiae, 36 in Apis mellifera, 47 in Tribolium castaneum, and 44 in Danaus plexippus. Comparative analysis showed that each gene involved in the early steps of the mevalonate (MVA) pathway, in the neuropeptide regulation of JH biosynthesis, or in JH signaling is a single copy in B. mori and other surveyed insects, indicating that these JH-related pathways or steps are likely conserved in all surveyed insects. However, each gene participating in the isoprenoid branch of JH... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Juvenile hormone; Biosynthesis; Metabolism; Signaling; Gene duplication. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000300018 |
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| Bouvard, Claire; Galy-fauroux, Isabelle; Grelac, Francoise; Carpentier, Wassila; Lokajczyk, Anna; Gandrille, Sophie; Colliec-jouault, Sylvia; Fischer, Anne-marie; Helley, Dominique. |
| Low-molecular-weight fucoidan (LMWF) is a sulfated polysaccharide extracted from brown seaweed that presents antithrombotic and pro-angiogenic properties. However, its mechanism of action is not well-characterized. Here, we studied the effects of LMWF on cell signaling and whole genome expression in human umbilical vein endothelial cells and endothelial colony forming cells. We observed that LMWF and vascular endothelial growth factor had synergistic effects on cell signaling, and more interestingly that LMWF by itself, in the absence of other growth factors, was able to trigger the activation of the PI3K/AKT pathway, which plays a crucial role in angiogenesis and vasculogenesis. We also observed that the effects of LMWF on cell migration were... |
| Tipo: Text |
Palavras-chave: Fucoidan; Angiogenesis; Vasculogenesis; Migration; Signaling; Transcriptomics. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00308/41913/41187.pdf |
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| Bureau, Jean-Christophe; Gozlan, Estelle; Marette, Stephan. |
| Focusing on the issue of food safety, we consider a framework of repeated purchases under the scenario of imperfect information on product quality (adverse selection and experience goods). A firm in a northern country can more easily detect tainted products than can a southern one. When imports are banned, the northern firm does not always signal the actual quality of its products. Competition from imports may lead the northern firm to test the quality of its products as a way to differentiate itself from foreign competitors. Consumers benefit from the disclosure of information on quality, even though borders are open to products of uncertain quality. However, competition from imports also increases the cost of signaling high quality. This can be... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Adverse selection; North-south trade; Signaling; Trade; International Relations/Trade. |
| Ano: 2001 |
URL: http://purl.umn.edu/18636 |
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| Kushnir, Alexey. |
| A costless signaling mechanism has been proposed as a device to improve welfare in decentralized two-sided matching markets. An example of such an environment is a job market for new Ph.D. economists. We study a market game of incomplete information between firms and workers and show that costless signaling is actually harmful in some matching markets. Specifically, if agents have very similar preferences, signaling lessens the total number of matches and the welfare of firms, as well as it affects ambiguously the welfare of workers. These results run contrary to previous findings that costless signaling facilitates match formation. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Matching Markets; Signaling; Institutional and Behavioral Economics; C70. |
| Ano: 2009 |
URL: http://purl.umn.edu/50730 |
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| Feng, Hongli; Hennessy, David A.. |
| Pigouvian taxes are typically imposed in situations where there is imperfect knowledge on the extent of damage caused by a producing firm. A regulator imposing imperfectly informed Pigouvian taxes may cause the firms that should (should not) produce to shut down (produce). In this paper we use a Bayesian information framework to identify optimal signal-conditioned taxes in the presence of such losses. The tax system involves reducing (increasing) taxes on firms identified as causing high (low) damage. Unfortunately, when an abatement decision has to be made, the tax system that minimizes production distortions also dampens the incentive to abate. In the absence of wrong-firm concerns, a regulator can solve the problem by not adjusting taxes for signal... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Conditioning; Heterogeneity; Informativeness; Pigouvian tax; Signaling; Environmental Economics and Policy. |
| Ano: 2005 |
URL: http://purl.umn.edu/18480 |
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| Kushnir, Alexey. |
| Some labor markets have recently developed formal signalling mechanisms, e.g. the signalling for interviews in the job market for new Ph.D. economists. We evaluate the effect of such mechanisms on two-sided matching markets by considering a game of incomplete information between firms and workers. Workers have almost aligned preferences over firms: each worker has “typical” commonly known preferences with probability close to one and “atypical” idiosyncratic preferences with the complementary probability close to zero. Firms have some commonly known preferences over workers. We show that the introduction of a signalling mechanism is harmful for this environment. Though signals transmit previously unavailable information, they also facilitate information... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Signaling; Cheaptalk; Matching; Environmental Economics and Policy; C72; C78; D80; J44. |
| Ano: 2010 |
URL: http://purl.umn.edu/96837 |
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| Moreno,Adrian A; Orellana,Ariel. |
| Unfolded protein response (UPR) is a signaling mechanism activated by misfolded protein accumulation in the endoplasmic reticulum. It is a widespread process that has been described in organisms ranging from yeasts to mammals. In recent years, our understanding of UPR signaling pathway in plants has advanced. Two transcription factors from Arabidopsis thaliana have been reported to function as the sensor/ transducer of this response (AtbZIP60 and AtbZIP28). They seem to be involved in both heat and biotic stress. Furthermore, overexpression of one of them (AtbZIP60) produces plants with a higher tolerance for salt stress, suggesting that this transcription factor may play a role in abiotic stress. Furthermore, some data suggest that crosstalk between genes... |
| Tipo: Journal article |
Palavras-chave: Endoplasmic reticulum; Plant; Signaling; Unfolded protein response. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000100010 |
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| Kamiguti,A.S.; Zuzel,M.; Theakston,R.D.G.. |
| Metalloproteinases and disintegrins are important components of most viperid and crotalid venoms. Large metalloproteinases referred to as MDC enzymes are composed of an N-terminal Metalloproteinase domain, a Disintegrin-like domain and a Cys-rich C-terminus. In contrast, disintegrins are small non-enzymatic RGD-containing cysteine-rich polypeptides. However, the disintegrin region of MDC enzymes bears a high degree of structural homology to that of the disintegrins, although it lacks the RGD motif. Despite these differences, both components share the property of being able to recognize integrin cell surface receptors and thereby to inhibit integrin-dependent cell reactions. Recently, several membrane-bound MDC enzymes, closely related to soluble venom MDC... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Venom; Metalloproteinase; Disintegrin; Platelet; Integrin; Signaling. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000700001 |
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| Yaghooti,H.; Firoozrai,M.; Fallah,S.; Khorramizadeh,M.R.. |
| Angiotensin II (ANG II), the main effector of the renin-angiotensin system, is implicated in endothelial permeability, recruitment and activation of the immune cells, and also vascular remodeling through induction of inflammatory genes. Matrix metalloproteinases (MMPs) are considered to be important inflammatory factors. Elucidation of ANG II signaling pathways and of possible cross-talks between their components is essential for the development of efficient inhibitory medications. The current study investigates the inflammatory signaling pathways activated by ANG II in cultures of human monocytic U-937 cells, and the effects of specific pharmacological inhibitors of signaling intermediates on MMP-9 gene (MMP-9) expression and activity. MMP-9 expression... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Angiotensin II; Signaling; MMP-9; Monocytic cell. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000300003 |
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| Arruda,Rejanne Lima; Paz,Andressa Tuane Santana; Bara,Maria Teresa Freitas; Côrtes,Márcio Vinicius de Carvalho Barros; Filippi,Marta Cristina Corsi de; Conceição,Edemilson Cardoso da. |
| ABSTRACT: Phytoalexins are compounds that have been studied a few years ago, which present mainly antimicrobial activity. The plants of the family Poaceae are the most geographically widespread and stand out for their economic importance, once they are cereals used as staple food. This family stands out for having a variety of phytoalexins, which can be synthesized via the shikimic acid (the phenylpropanoids), or mevalonic acid, being considered terpenoid phytoalexins. The characterization of these compounds with antimicrobial activity is carried out using chromatographic techniques, and the high-performance liquid chromatography (HPLC) coupled with mass spectrometry are the most efficient methods in this process. This research aimed to present an approach... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Metabolites; Protection of plants; Signaling; Oryza sativa. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701206 |
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| Registros recuperados: 12 | |
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