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  1 / 188534 MEDLINE  
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[PMID]:29381715
[Au] Autor:Hirai S; Yokoyama E; Wakui T; Ishige T; Nakamura M
[Ad] Endereço:Division of Bacteriology, Chiba Prefectural Institute of Public Health, Chiba, Japan.
[Ti] Título:Enterohemorrhagic Escherichia coli O157 subclade 8b strains in Chiba Prefecture, Japan, produced larger amounts of Shiga toxin 2 than strains in subclade 8a and other clades.
[So] Source:PLoS One;13(1):e0191834, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Enterohemorrhagic Escherichia coli O157 (O157) strains can be classified into clades (one of several phylogenetic groups) by single nucleotide polymorphisms (SNPs): these are clade 1, clade 2, clade 3, descendant and ancestral clades 4/5, clade 6, clade 7, clade 8, clade 9, and clade 12. Some recent studies showed that some O157 strains in clade 8 produced a larger amount of Shiga toxin (Stx) 2 than other strains. In this study, 1121 epidemiologically unlinked strains of O157 isolated in Chiba Prefecture, Japan were classified into clades during 1996-2014. Clade 8 strains were further classified into subclade 8a (67 strains) and subclade 8b (48 strains) using SNP analysis. In the absence of mitomycin C (MMC), subclade 8a strains in this study produced significantly greater amounts of Stx2 than subclade 8b strains. However, in the presence of MMC, the levels of Stx2 production in subclade 8b strains were significantly greater than subclade 8a strains. On the other hand, a recent study reported that the Stx2 production level in O157 strains was determined mainly by the subtypes of Stx2a phage (Ï•Stx2_α, ß, γ, δ, ε, and ζ). Using O157 strains in this study, the Stx2a phages were classified into these subtypes. In this study, all strains of subclades 8a and 8b carried Ï•Stx2a_γ and Ï•Stx2a_δ, respectively. Some strains in clade 6 also carried Ï•Stx2a_δ. In the presence of MMC, subclade 8b strains produced significantly greater amounts of Stx2 than clade 6 strains carrying Ï•Stx2_δ. In this study, we propose that Stx2 production in subclade 8b strains in the presence of MMC might be enhanced due to genetic factors other than Ï•Stx2_δ.
[Mh] Termos MeSH primário: Escherichia coli Êntero-Hemorrágica/metabolismo
Toxina Shiga II/biossíntese
[Mh] Termos MeSH secundário: Escherichia coli Êntero-Hemorrágica/classificação
Escherichia coli Êntero-Hemorrágica/genética
Infecções por Escherichia coli/microbiologia
Infecções por Escherichia coli/fisiopatologia
Genes Bacterianos
Seres Humanos
Japão
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Shiga Toxin 2)
[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:10.1371/journal.pone.0191834


  2 / 188534 MEDLINE  
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[PMID]:29258563
[Au] Autor:Treitler JT; Drissen T; Stadtmann R; Zerbe S; Mantilla-Contreras J
[Ad] Endereço:RG Ecology and Environmental Education, Institute of Biology and Chemistry, University of Hildesheim, Universitätsplatz 1, 31141, Hildesheim, Germany. treitler@uni-hildesheim.de.
[Ti] Título:Complementing endozoochorous seed dispersal patterns by donkeys and goats in a semi-natural island ecosystem.
[So] Source:BMC Ecol;17(1):42, 2017 Dec 19.
[Is] ISSN:1472-6785
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Endozoochory is, in grazing systems, a substantial vector for seed dispersal. It can play an important role in vegetation dynamics, especially in colonization processes through seed input on the vegetation and on the soil seed bank. We investigated the endozoochorous seed input of donkeys and goats on a semi-natural island ecosystem in the Mediterranean. Through germination experiments, we assessed the viable seed content of the dung of these grazing animals to estimate their suitability and efficiency for seed dispersal of the vegetation types of the island. RESULTS: We show different dispersal patterns of donkeys and goats. Goats disperse a high number of diaspores from shrubs while donkeys disperse more diaspores of grasses. In addition, goats disperse plants of greater growth height and donkeys plants of shorter height. These dispersal patterns are in accordance with the vegetation types of which donkeys and goats disperse indicator species. Both, donkeys and goats, feed on and disperse species of the vegetation types, open grassland and temporarily wet grassland. In addition, goats feed on and disperse diagnostic species of the semi-open maquis and preforest formations. CONCLUSIONS: Overall, our results show that donkeys and goats are complementing each other in their endozoochorous seed dispersal potential. This emphasizes the importance of both grazing animals for the vegetation dynamics of the semi-natural island ecosystem. Therefore, the adaption of the goat management to a traditional land management based on directed transhumance might maintain and enrich vegetation types.
[Mh] Termos MeSH primário: Equidae/fisiologia
Cabras/fisiologia
Herbivoria
Dispersão de Sementes
[Mh] Termos MeSH secundário: Animais
Ilhas
Itália
Estações do Ano
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[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:171221
[St] Status:MEDLINE
[do] DOI:10.1186/s12898-017-0148-6


  3 / 188534 MEDLINE  
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[PMID]:29202686
[Au] Autor:Feldmeyer B; Elsner D; Alleman A; Foitzik S
[Ad] Endereço:Senckenberg Biodiversity and Climate Research Centre (BiK-F), Molecular Ecology, Senckenberganlage 25, 60325, Frankfurt am Main, Germany. barbara.feldmeyer@senckenberg.de.
[Ti] Título:Species-specific genes under selection characterize the co-evolution of slavemaker and host lifestyles.
[So] Source:BMC Evol Biol;17(1):237, 2017 Dec 04.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The transition to a parasitic lifestyle entails comprehensive changes to the selective regime. In parasites, genes encoding for traits that facilitate host detection, exploitation and transmission should be under selection. Slavemaking ants are social parasites that exploit the altruistic behaviour of their hosts by stealing heterospecific host brood during raids, which afterwards serve as slaves in slavemaker nests. Here we search for evidence of selection in the transcriptomes of three slavemaker species and three closely related hosts. We expected selection on genes underlying recognition and raiding or defense behaviour. Analyses of selective forces in species with a slavemaker or host lifestyle allowed investigation into whether or not repeated instances of slavemaker evolution share the same genetic basis. To investigate the genetic basis of host-slavemaker co-evolution, we created orthologous clusters from transcriptome sequences of six Temnothorax ant species - three slavemakers and three hosts - to identify genes with signatures of selection. We further tested for functional enrichment in selected genes from slavemakers and hosts respectively and investigated which pathways the according genes belong to. RESULTS: Our phylogenetic analysis, based on more than 5000 ortholog sequences, revealed sister species status for two slavemakers as well as two hosts, contradicting a previous phylogeny based on mtDNA. We identified 309 genes with signs of positive selection on branches leading to slavemakers and 161 leading to hosts. Among these were genes potentially involved in cuticular hydrocarbon synthesis, thus species recognition, and circadian clock functionality possibly explaining the different activity patterns of slavemakers and hosts. There was little overlap of genes with signatures of positive selection among species, which are involved in numerous different functions and different pathways. CONCLUSIONS: We identified different genes, functions and pathways under positive selection in each species. These results point to species-specific adaptations rather than convergent trajectories during the evolution of the slavemaker and host lifestyles suggesting that the evolution of parasitism, even in closely related species, may be achieved in diverse ways.
[Mh] Termos MeSH primário: Formigas/genética
Formigas/parasitologia
Comportamento Animal
Evolução Biológica
Interações Hospedeiro-Parasita/genética
Seleção Genética
[Mh] Termos MeSH secundário: Animais
Regulação da Expressão Gênica
Funções Verossimilhança
Filogenia
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[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:171206
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-1078-9


  4 / 188534 MEDLINE  
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[PMID]:29187208
[Au] Autor:Segatto ALA; Reck-Kortmann M; Turchetto C; Freitas LB
[Ad] Endereço:Laboratory of Molecular Evolution, Department of Genetics, Universidade Federal do Rio Grande do Sul, P.O. Box 15053, Porto Alegre, RS, 91501-970, Brazil.
[Ti] Título:Multiple markers, niche modelling, and bioregions analyses to evaluate the genetic diversity of a plant species complex.
[So] Source:BMC Evol Biol;17(1):234, 2017 Nov 29.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The classification of closely related plants is not straightforward. These morphologically similar taxa frequently maintain their inter-hybridization potential and share ancestral polymorphisms as a consequence of their recent divergence. Under the biological species concept, they may thus not be considered separate species. The Petunia integrifolia complex is especially interesting because, in addition to the features mentioned above, its taxa share a pollinator, and their geographical ranges show multiple overlaps. Here, we combined plastid genome sequences, nuclear microsatellites, AFLP markers, ecological niche modelling, and bioregions analysis to investigate the genetic variability between the different taxa of the P. integrifolia complex in a comprehensive sample covering the entire geographical range of the complex. RESULTS: Results from molecular markers did not fully align with the current taxonomic classification. Niche modelling and bioregions analyses revealed that taxa were associated with different ecological constraints, indicating that the habitat plays an important role in preserving species boundaries. For three taxa, our analyses showed a mostly conserved, non-overlapping geographical distribution over time. However, for two taxa, niche modelling found an overlapping distribution over time; these taxa were also associated with the same bioregions. CONCLUSIONS: cpDNA markers were better able to discriminate between Petunia taxa than SSRs and AFLPs. Overall, our results suggest that the P. integrifolia complex represents a continuum of individuals from distant and historically isolated populations, which share some morphological traits, but are established in four different evolutionary lineages.
[Mh] Termos MeSH primário: Ecossistema
Variação Genética
Geografia
Petunia/genética
[Mh] Termos MeSH secundário: Análise do Polimorfismo de Comprimento de Fragmentos Amplificados
DNA de Cloroplastos/genética
Marcadores Genéticos
Haplótipos/genética
Repetições de Microssatélites/genética
Filogenia
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Chloroplast); 0 (Genetic Markers)
[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:171201
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-1084-y


  5 / 188534 MEDLINE  
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[PMID]:29187161
[Au] Autor:Wu YQ; Qu YF; Wang XJ; Gao JF; Ji X
[Ad] Endereço:Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, 210023, China.
[Ti] Título:Does the oviparity-viviparity transition alter the partitioning of yolk in embryonic snakes?
[So] Source:BMC Evol Biol;17(1):235, 2017 Nov 29.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The oviparity-viviparity transition is a major evolutionary event, likely altering the reproductive process of the organisms involved. Residual yolk, a portion of yolk remaining unutilized at hatching or birth as parental investment in care, has been investigated in many oviparous amniotes but remained largely unknown in viviparous species. Here, we used data from 20 (12 oviparous and 8 viviparous) species of snakes to see if the oviparity-viviparity transition alters the partitioning of yolk in embryonic snakes. We used ANCOVA to test whether offspring size, mass and components at hatching or birth differed between the sexes in each species. We used both ordinary least squares and phylogenetic generalized least squares regressions to test whether relationships between selected pairs of offspring components were significant. We used phylogenetic ANOVA to test whether offspring components differed between oviparous and viviparous species and, more specifically, the hypothesis that viviparous snakes invest more in the yolk as parental investment in embryogenesis to produce more well developed offspring that are larger in linear size. RESULTS: In none of the 20 species was sex a significant source of variation in any offspring component examined. Newborn viviparous snakes on average contained proportionally more water and, after accounting for body dry mass, had larger carcasses but smaller residual yolks than did newly hatched oviparous snakes. The rates at which carcass dry mass (CDM) and fat body dry mass (FDM) increased with residual yolk dry mass (YDM) did not differ between newborn oviparous and viviparous snakes. Neither CDM nor FDM differed between newborn oviparous and viviparous snakes after accounting for YDM. CONCLUSIONS: Our results are not consistent with the hypothesis that the partitioning of yolk between embryonic and post-embryonic stages differs between snakes that differ in parity mode, but instead show that the partitioning of yolk in embryonic snakes is species-specific or phylogenetically related. We conclude that the oviparity-viviparity transition does not alter yolk partitioning in embryonic snakes.
[Mh] Termos MeSH primário: Gema de Ovo/fisiologia
Embrião não Mamífero/fisiologia
Oviparidade/fisiologia
Serpentes/embriologia
Viviparidade não Mamífera/fisiologia
[Mh] Termos MeSH secundário: Animais
Animais Recém-Nascidos
Feminino
Filogenia
Análise de Regressão
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[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:171201
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-1083-z


  6 / 188534 MEDLINE  
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[PMID]:29178825
[Au] Autor:Abalde S; Tenorio MJ; Afonso CML; Uribe JE; Echeverry AM; Zardoya R
[Ad] Endereço:Museo Nacional de Ciencias Naturales (MNCN-CSIC), José Gutiérrez Abascal 2, 28006, Madrid, Spain.
[Ti] Título:Phylogenetic relationships of cone snails endemic to Cabo Verde based on mitochondrial genomes.
[So] Source:BMC Evol Biol;17(1):231, 2017 Nov 25.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Due to their great species and ecological diversity as well as their capacity to produce hundreds of different toxins, cone snails are of interest to evolutionary biologists, pharmacologists and amateur naturalists alike. Taxonomic identification of cone snails still relies mostly on the shape, color, and banding patterns of the shell. However, these phenotypic traits are prone to homoplasy. Therefore, the consistent use of genetic data for species delimitation and phylogenetic inference in this apparently hyperdiverse group is largely wanting. Here, we reconstruct the phylogeny of the cones endemic to Cabo Verde archipelago, a well-known radiation of the group, using mitochondrial (mt) genomes. RESULTS: The reconstructed phylogeny grouped the analyzed species into two main clades, one including Kalloconus from West Africa sister to Trovaoconus from Cabo Verde and the other with a paraphyletic Lautoconus due to the sister group relationship of Africonus from Cabo Verde and Lautoconus ventricosus from Mediterranean Sea and neighboring Atlantic Ocean to the exclusion of Lautoconus endemic to Senegal (plus Lautoconus guanche from Mauritania, Morocco, and Canary Islands). Within Trovaoconus, up to three main lineages could be distinguished. The clade of Africonus included four main lineages (named I to IV), each further subdivided into two monophyletic groups. The reconstructed phylogeny allowed inferring the evolution of the radula in the studied lineages as well as biogeographic patterns. The number of cone species endemic to Cabo Verde was revised under the light of sequence divergence data and the inferred phylogenetic relationships. CONCLUSIONS: The sequence divergence between continental members of the genus Kalloconus and island endemics ascribed to the genus Trovaoconus is low, prompting for synonymization of the latter. The genus Lautoconus is paraphyletic. Lautoconus ventricosus is the closest living sister group of genus Africonus. Diversification of Africonus was in allopatry due to the direct development nature of their larvae and mainly triggered by eustatic sea level changes during the Miocene-Pliocene. Our study confirms the diversity of cone endemic to Cabo Verde but significantly reduces the number of valid species. Applying a sequence divergence threshold, the number of valid species within the sampled Africonus is reduced to half.
[Mh] Termos MeSH primário: Genoma Mitocondrial
Filogenia
Caramujos/classificação
Caramujos/genética
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
Cabo Verde
DNA Mitocondrial/genética
Variação Genética
Análise de Sequência de DNA
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[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:171128
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-1069-x


  7 / 188534 MEDLINE  
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[PMID]:28934709
[Au] Autor:Liu Z; Li X; Tai P; Sun L; Yuan H; Yang X
[Ad] Endereço:Key Laboratory of Pollution Ecology and Environmental Engineering, Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
[Ti] Título:Toxicity of ammonia, cadmium, and nitrobenzene to four local fishes in the Liao River, China and the derivation of site-specific water quality criteria.
[So] Source:Ecotoxicol Environ Saf;147:656-663, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Water quality criteria (WQC) are considered to be an effective management tool for protecting aquatic environments. To derive site-specific WQC for an area, local data based on local species are essential to improve the applicability of WQC derived. Due to the paucity of local fish data available for the development of site-specific WQC for the Liao River, China, four local and widespread fishes (Pseudorasbora parva, Abbottina liaoningensis, Ctenogobius giurinus, and Misgurnus anguillicaudatus) were chosen to test their sensitivities to ammonia, cadmium and nitrobenzene. These compounds are common and regularly-measured pollutants in Chinese rivers. In addition to the published data for species resident in the Liao River, site-specific WQC for the three chemicals were derived using both a log-logistic species sensitivity distribution (SSD) and the method recommended by the USEPA, in line with current best practice, which were then compared with Chinese national WQC. It was found that A. liaoningensis was the most sensitive, followed, in order, by P. parva, C. giurinus and M. anguillicaudatus was the least sensitive, and this trend was the same to all three chemicals tested. When comparing the SSD derived solely from previously-published data with that including our data on local fish, there were significant differences identified among parameters describing the SSD curves for ammonia and nitrobenzene and significant differences were detected for site-specific WQC derived for all of the three chemicals. Based on the dataset with local fish data taxa, site-specific WQC of Liao River for ammonia, cadmium, and nitrobenzene were derived to be 20.53mg/L (at a pH of 7.0 and temperature of 20°C), 3.76µg/L (at a hardness of 100mg/L CaCO ), and 0.49mg/L, respectively. Using the same deriving method for each chemical, the national Chinese WQC were higher than site-specific WQC derived in this study for ammonia (national WQC of 25.16mg/L) and nitrobenzene (national WQC of 0.57mg/L), while the national WQC for cadmium was lower (national WQC of 1.81µg/L). These results indicated that published data can be helpful for use when deriving site-specific WQC but that there were differences between site-specific and national WQC which may lead to either over- or under-protection depending on the pollutant if national WQC were used as the basis for the water management of specific river systems, like the Liao River.
[Mh] Termos MeSH primário: Amônia/toxicidade
Cádmio/toxicidade
Peixes/crescimento & desenvolvimento
Nitrobenzenos/toxicidade
Rios/química
Poluentes Químicos da Água/toxicidade
Qualidade da Água/normas
[Mh] Termos MeSH secundário: Amônia/análise
Animais
Cádmio/análise
China
Dose Letal Mediana
Nitrobenzenos/análise
Especificidade da Espécie
Testes de Toxicidade
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Nitrobenzenes); 0 (Water Pollutants, Chemical); 00BH33GNGH (Cadmium); 7664-41-7 (Ammonia); E57JCN6SSY (nitrobenzene)
[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:170922
[St] Status:MEDLINE


  8 / 188534 MEDLINE  
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[PMID]:29441964
[Au] Autor:Kono Y; Miyoshi S; Fujita T
[Ti] Título:Dextran sodium sulfate alters cytokine production in macrophages .
[So] Source:Pharmazie;71(11):619-624, 2016 Nov 02.
[Is] ISSN:0031-7144
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Macrophages have been assumed to have a crucial role in the development of inflammatory bowel disease (IBD). However, involvement of intestinal macrophages in IBD onset and functional alterations of macrophages during IBD development has not been clarified. We investigated the effect of exposure of compounds used in the induction of colitis in mice on the immune responses of peritoneal macrophages in mice. 2,4,6- trinitrobenzenesulfonic acid and oxazolone did not affect the production of interleukin (IL)-10 and IL-12 from lipopolysaccharide (LPS)-stimulated peritoneal macrophages from BALB/c mice. A significant increase in IL-10 secretion and decrease in IL-12 production from LPS-stimulated macrophages were observed upon exposure to dextran sodium sulfate (DSS). TNF-α production was enhanced significantly by exposure to DSS and LPS. The level of nitric-oxide production from macrophages was increased slightly by exposure to DSS and LPS. Expression of sphingosine kinase-1 and LIGHT (both of which are specific biomarkers of M2b macrophages) was observed in macrophages upon DSS exposure. Alteration of cytokine production in macrophages was observed upon DSS exposure in the absence of LPS stimulation. Peritoneal macrophages from C57BL/6 mice showed similar responses to peritoneal macrophages from BALB/c mice against DSS. These results suggest that DSS directs the immune response of macrophages towards the M2b phenotype.
[Mh] Termos MeSH primário: Citocinas/biossíntese
Sulfato de Dextrana/farmacologia
Macrófagos Peritoneais/metabolismo
[Mh] Termos MeSH secundário: Animais
Colite/induzido quimicamente
Colite/patologia
Feminino
Técnicas In Vitro
Interleucina-10/biossíntese
Interleucina-10/genética
Interleucina-12/biossíntese
Interleucina-12/genética
Lipopolissacarídeos/farmacologia
Macrófagos Peritoneais/efeitos dos fármacos
Camundongos
Camundongos Endogâmicos BALB C
Camundongos Endogâmicos C57BL
Óxido Nítrico/biossíntese
Fosfotransferases (Aceptor do Grupo Álcool)/biossíntese
Fosfotransferases (Aceptor do Grupo Álcool)/genética
Especificidade da Espécie
Membro 14 da Superfamília de Ligantes de Fatores de Necrose Tumoral/biossíntese
Membro 14 da Superfamília de Ligantes de Fatores de Necrose Tumoral/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cytokines); 0 (IL10 protein, mouse); 0 (Lipopolysaccharides); 0 (Tnfsf14 protein, mouse); 0 (Tumor Necrosis Factor Ligand Superfamily Member 14); 130068-27-8 (Interleukin-10); 187348-17-0 (Interleukin-12); 31C4KY9ESH (Nitric Oxide); 9042-14-2 (Dextran Sulfate); EC 2.7.1.- (Phosphotransferases (Alcohol Group Acceptor)); EC 2.7.1.- (sphingosine kinase)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180215
[St] Status:MEDLINE
[do] DOI:10.1691/ph.2016.6688


  9 / 188534 MEDLINE  
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[PMID]:28985652
[Au] Autor:Zhang BL; Ouyang YN; Xu JY; Liu K
[Ad] Endereço:Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434023, China; Hubei Collaborative Innovation Center for Grain Industry, Yangtze University, Jingzhou 434023, China. Electronic address: zhangbl833@hotmail.com.
[Ti] Título:Cadmium remobilization from shoot to grain is related to pH of vascular bundle in rice.
[So] Source:Ecotoxicol Environ Saf;147:913-918, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The remobilization of cadmium (Cd) from shoots to grain is the key process to determine the Cd accumulation in grain. The apoplastic pH of plants is an important factor and signal in influencing on plant responding to environmental variation and inorganic elements uptake. It is proposed that pH of rice plants responds and influences on Cd remobilization from shoots to grain when rice is exposed to Cd stress. The results of hydroponic experiment showed that: pH of the rice leaf vascular bundles among 3 cultivars was almost increased, pH value of 1 cultivar was slightly increasing when rice plants were treated with Cd. The decrease degree of H concentration in leaf vascular bundles was different among cultivars. The cultivar with higher decreasing in H concentration, showed higher Cd transfer efficiency from shoots to grain. The H concentration of leaf vascular bundles under normal condition was negatively correlated to cadmium accumulation in leaf. Moreover, pH change was related to Cd accumulation in shots and remobilization from shoots to grain. Uncovering the role of pH response is a key component for the understanding Cd uptake and remobilization mechanism for rice production.
[Mh] Termos MeSH primário: Cádmio/metabolismo
Grãos Comestíveis/metabolismo
Oryza/metabolismo
Brotos de Planta/metabolismo
Feixe Vascular de Plantas/química
Poluentes do Solo/metabolismo
[Mh] Termos MeSH secundário: Transporte Biológico
Cádmio/análise
Grãos Comestíveis/química
Concentração de Íons de Hidrogênio
Hidroponia
Modelos Teóricos
Oryza/química
Folhas de Planta/química
Brotos de Planta/química
Poluentes do Solo/análise
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil Pollutants); 00BH33GNGH (Cadmium)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171008
[St] Status:MEDLINE


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[PMID]:28968938
[Au] Autor:Rotini A; Gallo A; Parlapiano I; Berducci MT; Boni R; Tosti E; Prato E; Maggi C; Cicero AM; Migliore L; Manfra L
[Ad] Endereço:Department of Biology, University Tor Vergata, Rome, Italy; Institute for Environmental Protection and Research (ISPRA), Rome, Italy.
[Ti] Título:Insights into the CuO nanoparticle ecotoxicity with suitable marine model species.
[So] Source:Ecotoxicol Environ Saf;147:852-860, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Metal oxide nanoparticles, among them copper oxide nanoparticles (CuO NPs), are widely used in different applications (e.g. batteries, gas sensors, superconductors, plastics and metallic coatings), increasing their potential release in the environment. In aquatic matrix, the behavior of CuO NPs may strongly change, depending on their surface charge and some physical-chemical characteristics of the medium (e.g. ionic strength, salinity, pH and natural organic matter content). Ecotoxicity of CuO NPs to aquatic organisms was mainly studied on freshwater species, few tests being performed on marine biota. The aim of this study was to assess the toxicity of CuO NPs on suitable indicator species, belonging to the ecologically relevant level of consumers. The selected bioassays use reference protocols to identify Effect/Lethal Concentrations (E(L)C), by assessing lethal and sub-lethal endpoints. Mortality tests were performed on rotifer (Brachionus plicatilis), shrimp (Artemia franciscana) and copepod (Tigriopus fulvus). While moult release failure and fertilization rate were studied, as sub-lethal endpoints, on T. fulvus and sea urchin (Paracentrotus lividus), respectively. The size distribution and sedimentation rates of CuO NPs, together with the copper dissolution, were also analyzed in the exposure media. The CuO NP ecotoxicity assessment showed a concentration-dependent response for all species, indicating similar mortality for B. plicatilis (48hLC = 16.94 ± 2.68mg/l) and T. fulvus (96hLC = 12.35 ± 0.48mg/l), followed by A. franciscana (48hLC = 64.55 ± 3.54mg/l). Comparable EC values were also obtained for the sub-lethal endpoints in P. lividus (EC = 2.28 ± 0.06mg/l) and T. fulvus (EC = 2.38 ± 0.20mg/l). Copper salts showed higher toxicity than CuO NPs for all species, with common sensitivity trend as follows: P. lividus ≥ T. fulvus (sublethal endpoint) ≥ B. plicatilis >T. fulvus (lethal endpoint) >A. franciscana. CuO NP micrometric aggregates and high sedimentation rates were observed in the exposure media, with different particle size distributions depending on the medium. The copper dissolution was about 0.16% of the initial concentration, comparable to literature values. The integrated ecotoxicological-physicochemical approach was used to better describe CuO NP toxicity and behavior. In particular, the successful application of ecotoxicological reference protocols allowed to produce reliable L(E)C data useful to identify thresholds and assess potential environmental hazard due to NPs.
[Mh] Termos MeSH primário: Organismos Aquáticos/efeitos dos fármacos
Cobre/toxicidade
Nanopartículas Metálicas/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Ecotoxicologia
Água Doce
Modelos Animais
Tamanho da Partícula
Salinidade
Especificidade da Espécie
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 789U1901C5 (Copper); V1XJQ704R4 (cupric oxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171004
[St] Status:MEDLINE



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