Base de dados : MEDLINE
Pesquisa : B01.050.150.900.493.602.105 [Categoria DeCS]
Referências encontradas : 2409 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 241 ir para página                         

  1 / 2409 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28745404
[Au] Autor:Kadlec SM; Johnson RD; Mount DR; Olker JH; Borkholder BD; Schoff PK
[Ad] Endereço:Integrated Biosciences Graduate Program, University of Minnesota-Duluth, Minnesota, USA.
[Ti] Título:Testicular oocytes in smallmouth bass in northeastern Minnesota in relation to varying levels of human activity.
[So] Source:Environ Toxicol Chem;36(12):3424-3435, 2017 Dec.
[Is] ISSN:1552-8618
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Testicular oocytes (TOs) have been found in black bass (Micropterus spp.) from many locations in North America. The presence of TOs is often assumed to imply exposure to estrogenic endocrine disrupting compounds (EDCs); however, a definitive causal relationship has yet to be established, and TO prevalence is not consistently low in fish from areas lacking evident EDC sources. This might indicate any of a number of situations: 1) unknown or unidentified EDCs or EDC sources, 2) induction of TOs by other stressors, or 3) testicular oocytes occurring spontaneously during normal development. In the present study, we analyzed TO occurrence in smallmouth bass (Micropterus dolomieu) from 8 populations in northeastern Minnesota watersheds with differing degrees of human development and, hence, presumed likelihood of exposure to anthropogenic chemicals. Three watersheds were categorized as moderately developed, based on the presence of municipal wastewater discharges and higher human population density (4-81 per km ), and 5 watersheds were minimally developed, with very low human population density (0-1 per km ) and minimal built environment. Testicular tissues from mature fish were evaluated using a semiquantitative method that estimated TO density, normalized by cross-sectional area. Testicular oocyte prevalence and density among populations from moderately developed watersheds was higher than in populations from minimally developed watersheds. However, TO prevalence was unexpectedly high and variable (7-43%) in some populations from minimally developed watersheds, and only weak evidence was found for a relationship between TO density and watershed development, suggesting alternative or more complex explanations for TO presence in smallmouth bass from this region. Environ Toxicol Chem 2017;36:3424-3435. © 2017 SETAC.
[Mh] Termos MeSH primário: Disruptores Endócrinos/toxicidade
Oócitos/efeitos dos fármacos
Testículo/efeitos dos fármacos
Águas Residuais/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Bass
Atividades Humanas
Seres Humanos
Masculino
Minnesota
América do Norte
Oócitos/patologia
Densidade Demográfica
Rios/química
Testículo/patologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Endocrine Disruptors); 0 (Waste Water); 0 (Water Pollutants, Chemical)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:180218
[Lr] Data última revisão:
180218
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170727
[St] Status:MEDLINE
[do] DOI:10.1002/etc.3928


  2 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29176818
[Au] Autor:Basilio A; Searcy S; Thompson AR
[Ad] Endereço:Environmental and Ocean Sciences, University of San Diego, San Diego, California, United States of America.
[Ti] Título:Effects of the Blob on settlement of spotted sand bass, Paralabrax maculatofasciatus, to Mission Bay, San Diego, CA.
[So] Source:PLoS One;12(11):e0188449, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The West Coast of the United States experienced variable and sometimes highly unusual oceanographic conditions between 2012 and 2015. In particular, a warm mass of surface water known as the Pacific Warm Anomaly (popularly as "The Blob") impinged on southern California in 2014, and warm-water conditions remained during the 2015 El Niño. We examine how this oceanographic variability affected delivery and individual characteristics of larval spotted sand bass (Paralabrax maculatofasciatus) to an estuarine nursery habitat in southern California. To quantify P. maculatofasciatus settlement patterns, three larval collectors were installed near the mouth of Mission Bay, San Diego CA, and retrieved weekly from June-October of 2012-2015. During 'Blob' conditions in 2014 and 2015, lower settlement rates of spotted sand bass were associated with higher sea surface temperature and lower wind speed, chlorophyll a (chl a) and upwelling. Overall, the number of settlers per day peaked at intermediate chl a values across weeks. Individual characteristics of larvae that settled in 2014-2015 were consistent with a poor feeding environment. Although settlers were longer in length in 2014-15, fish in these years had slower larval otolith growth, a longer larval duration, and a trend towards lower condition, traits that are often associated with lower survival and recruitment. This study suggests that future settlement and recruitment of P. maculatofasciatus and other fishes with similar life histories may be adversely affected in southern California if ocean temperatures continue to rise in the face of climate change.
[Mh] Termos MeSH primário: Bass/fisiologia
Baías
Temperatura Ambiente
Água
[Mh] Termos MeSH secundário: Animais
California
Clorofila/análise
Geografia
Larva/fisiologia
Modelos Teóricos
Oceanografia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
059QF0KO0R (Water); 1406-65-1 (Chlorophyll); YF5Q9EJC8Y (chlorophyll a)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171219
[Lr] Data última revisão:
171219
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171128
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188449


  3 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29120695
[Au] Autor:Kraskura K; Nelson JA
[Ti] Título:Hypoxia and Sprint Swimming Performance of Juvenile Striped Bass, Morone saxatilis.
[So] Source:Physiol Biochem Zool;91(1):682-690, 2018 Jan/Feb.
[Is] ISSN:1537-5293
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Annual hypoxia in the Chesapeake Bay has expanded to the point where Darwinian fitness of juvenile striped bass (Morone saxatilis) may depend on their ability to perform in low-oxygen environments. The locomotion they use in predator/prey dynamics relies primarily on white (type II) muscle that is powered by anaerobic metabolic pathways and has generally been thought to be immune to aquatic hypoxia. We tested the sprint performance of 15 juvenile striped bass twice under acute hypoxia (20% air saturation [AS]) 5 wk apart and once under normoxia (>85% AS) in between. Average sprint performance was lower under the first hypoxia exposure than in normoxia and increased in the second hypoxia test relative to the first. The rank order of individual sprint performance was significantly repeatable when comparing the two hypoxia tests but not when compared with sprint performance measured under normoxic conditions. The maximum sprint performance of each individual was also significantly repeatable within a given day. Thus, sprint performance of striped bass is reduced under hypoxia, is phenotypically plastic, and improves with repetitive hypoxia exposures but is unrelated to relative sprint performance under normoxia. Since energy to fuel a sprint comes from existing ATP and creatine phosphate stores, the decline in sprint performance probably reflects reduced function of a part of the reflex chain leading from detection of aversive stimuli to activation of the muscle used to power the escape response.
[Mh] Termos MeSH primário: Bass/fisiologia
Consumo de Oxigênio
Oxigênio/química
Oxigênio/metabolismo
Natação/fisiologia
Água/química
[Mh] Termos MeSH secundário: Envelhecimento
Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
059QF0KO0R (Water); S88TT14065 (Oxygen)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171215
[Lr] Data última revisão:
171215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171110
[St] Status:MEDLINE
[do] DOI:10.1086/694933


  4 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27773730
[Au] Autor:Wang TY; Chen YM; Chen TY
[Ad] Endereço:Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan.
[Ti] Título:Molecular cloning of orange-spotted grouper (Epinephelus coioides) heat shock transcription factor 1 isoforms and characterization of their expressions in response to nodavirus.
[So] Source:Fish Shellfish Immunol;59:123-136, 2016 Dec.
[Is] ISSN:1095-9947
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Heat shock transcription factor 1 (HSF1) regulates heat shock proteins (HSPs), which assist in protein folding and inhibit protein denaturation following stress. HSF1 was firstly cloned from orange-spotted grouper and exists as two isoforms, one with (osgHSF1a) and one without (osgHSF1b) exon 11. Heat exposure increased the expression of osgHSF1b while cold exposure increased that of osgHSF1a. Both isoforms were mainly expressed in the brains, eyes, and fins. Expression of osgHSF1b was higher than osgHSF1a during development. Poly I:C and LPS could also induce osgHSF1 isoforms expression differentially. Exposure to nervous necrosis virus (NNV) increased the level of both osgHSF1 isoforms at 12 h. GF-1 cells with overexpression of osgHSF1 isoforms enhanced viral loads within 24 h, whereas both pharmacological inhibition and RNA interference of HSF1 reduced virus infection. This study shows that osgHSF1 can support the early stage of virus infection and provides a new insight into the molecular regulation of osgHSF1 between the influence of temperatures and immunity.
[Mh] Termos MeSH primário: Bass
Proteínas de Ligação a DNA/genética
Doenças dos Peixes/imunologia
Proteínas de Peixes/genética
Regulação da Expressão Gênica/imunologia
Infecções por Vírus de RNA/veterinária
Fatores de Transcrição/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Animais
Sequência de Bases
Clonagem Molecular
DNA Complementar/genética
DNA Complementar/metabolismo
Proteínas de Ligação a DNA/química
Proteínas de Ligação a DNA/metabolismo
Proteínas de Peixes/química
Proteínas de Peixes/metabolismo
Fatores de Transcrição de Choque Térmico
Temperatura Alta/efeitos adversos
Imunidade/efeitos dos fármacos
Lipopolissacarídeos/farmacologia
Nodaviridae/fisiologia
Filogenia
Poli I-C/farmacologia
Isoformas de Proteínas/química
Isoformas de Proteínas/genética
Isoformas de Proteínas/metabolismo
Infecções por Vírus de RNA/imunologia
Alinhamento de Sequência/veterinária
Fatores de Transcrição/química
Fatores de Transcrição/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Complementary); 0 (DNA-Binding Proteins); 0 (Fish Proteins); 0 (Heat Shock Transcription Factors); 0 (Lipopolysaccharides); 0 (Protein Isoforms); 0 (Transcription Factors); O84C90HH2L (Poly I-C)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171203
[Lr] Data última revisão:
171203
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161106
[St] Status:MEDLINE


  5 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28987822
[Au] Autor:Cadiz L; Zambonino-Infante JL; Quazuguel P; Madec L; Le Delliou H; Mazurais D
[Ad] Endereço:IFREMER, Centre de Bretagne, LEMAR (UMR 6539), 29280 Plouzané, France. Electronic address: Laura.Cadiz.Barrera@ifremer.fr.
[Ti] Título:Metabolic response to hypoxia in European sea bass (Dicentrarchus labrax) displays developmental plasticity.
[So] Source:Comp Biochem Physiol B Biochem Mol Biol;215:1-9, 2018 Jan.
[Is] ISSN:1879-1107
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Several physiological functions in fish are shaped by environmental stimuli received during early life. In particular, early-life hypoxia has been reported to have long-lasting effects on fish metabolism, with potential consequences for fish life history traits. In the present study, we examine whether the synergistic stressors hypoxia (40% and 100% air saturation) and temperature (15° and 20°C), encountered during early life, could condition later metabolic response in European sea bass (Dicentrarchus labrax) juveniles. Growth rate and metabolic parameters related to carbohydrate and lipid metabolism in the liver were investigated at the juvenile stage under normoxic and chronic hypoxic conditions. Juvenile growth rates were significantly lower (p<1×10 ) under hypoxic conditions and were not improved by prior early-life exposure to hypoxia. Growth was 1.3 times higher (p<5×10 ) in juveniles reared at 15°C during the larval stage than those reared at 20°C, suggesting that compensatory growth had occurred. Early-life exposure to hypoxia induced higher (p<2×10 ) glycogen stores in juveniles even though there was no apparent regulation of their carbohydrate metabolism. In the liver of juveniles exposed to chronic hypoxia, lower glycogen content combined with stimulation of phosphoenolpyruvate carboxykinase gene expression and higher lactate concentration indicated a stimulation of the anaerobic glycolytic pathway. Furthermore, hypoxia only induced lower (p<1×10 ) lipid content in the liver of juveniles that had experienced 15°C at the larval stage. The present study provides evidence that environmental conditions experienced during early life shape the metabolic traits of D. labrax with potential consequences for juvenile physiological performance.
[Mh] Termos MeSH primário: Adaptação Fisiológica
Bass/metabolismo
Metabolismo dos Carboidratos
Hipóxia/metabolismo
Metabolismo dos Lipídeos
[Mh] Termos MeSH secundário: Animais
Europa (Continente)
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171201
[Lr] Data última revisão:
171201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171009
[St] Status:MEDLINE


  6 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28454818
[Au] Autor:Shiu YL; Chiu KH; Huynh TG; Liu PC; Liu CH
[Ad] Endereço:Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, Taiwan.
[Ti] Título:Plasma immune protein analysis in the orange-spotted grouper Epinephelus coioides: Evidence for altered expressions of immune factors associated with a choline-supplemented diet.
[So] Source:Fish Shellfish Immunol;65:235-243, 2017 Jun.
[Is] ISSN:1095-9947
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study aimed to unravel the regulatory roles of choline in activating immune responses and disease resistance of the orange-spotted grouper Epinephelus coioides. Fish were fed a choline-supplemented diet at 1 g kg of feed for 30 days. Fish fed a fish meal basal diet without choline-supplement served as controls. At the end of the feeding trial, fish were challenged with Vibrio alginolyticus. Meanwhile, plasma proteomics of fish in each group were also evaluated by two-dimensional gel electrophoresis (2-DE), and differentially expressed proteins were identified by tandem mass spectrophotometry (MS/MS), then a Western blot analysis or real-time polymerase chain reaction was used to confirm differential expressions of immune-enhancing proteins. Results showed that choline significantly increased survival of E. coioides 48 days after being injected with V. alginolyticus. From maps of plasma proteins, a comparative analysis between the control and choline groups revealed that 111 spots matched, with 26 altered expression spots in the choline group. Of these 26 spots, 16 were upregulated and 10 downregulated. After protein identification by reverse-phase nano-high-performance liquid chromatography-electrospray ionization MS/MS analysis, eight of 26 proteins were found to be immune-related proteins, all of which were upregulated, including complement 3 (C3), alpha-2-macroglobulin-P-like isoform (A2M), fibrinogen beta chain precursor (FBG), and immunoglobulin heavy constant mu (Ighm) proteins. Expression of the A2M protein and A2M enzyme activity in plasma of fish fed choline significantly increased compared to the control group. Additionally, A2M messenger (m)RNA transcripts were also upregulated in the liver and kidneys. Significantly higher C3 expressions at both the mRNA and protein levels were detected in the liver of fish in the choline group. Moreover, FBG gene expressions in the liver and kidneys significantly increased, while Ighm increased in the kidneys and spleen of fish in the choline group. Our results suggest that dietary administration of choline can protect grouper against bacterial infections through activating the complement system, thereby inducing antiprotease activity and natural antibodies that play important roles in the innate immune system of fish.
[Mh] Termos MeSH primário: Bass
Colina
Dieta/veterinária
Suplementos Nutricionais
Resistência à Doença
Imunidade Inata/fisiologia
Imunomodulação/fisiologia
[Mh] Termos MeSH secundário: Adjuvantes Imunológicos
Ração Animal/análise
Animais
Proteínas Sanguíneas/genética
Proteínas Sanguíneas/metabolismo
Doenças dos Peixes/genética
Doenças dos Peixes/imunologia
Doenças dos Peixes/microbiologia
Proteínas de Peixes/genética
Proteínas de Peixes/metabolismo
Especificidade de Órgãos
Vibrioses/imunologia
Vibrioses/microbiologia
Vibrioses/veterinária
Vibrio alginolyticus/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Adjuvants, Immunologic); 0 (Blood Proteins); 0 (Fish Proteins); N91BDP6H0X (Choline)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170430
[St] Status:MEDLINE


  7 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29036192
[Au] Autor:Chen YT; Lin CF; Chen YM; Lo CE; Chen WE; Chen TY
[Ad] Endereço:Laboratory of Molecular Genetics, Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan.
[Ti] Título:Viral infection upregulates myostatin promoter activity in orange-spotted grouper (Epinephelus coioides).
[So] Source:PLoS One;12(10):e0186506, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Myostatin is a negative regulator of myogenesis and has been suggested to be an important factor in the development of muscle wasting during viral infection. The objective of this study was to characterize the main regulatory element of the grouper myostatin promoter and to study changes in promoter activity due to viral stimulation. In vitro and in vivo experiments indicated that the E-box E6 is a positive cis-and trans-regulation motif, and an essential binding site for MyoD. In contrast, the E-box E5 is a dominant negative cis-regulatory. The characteristics of grouper myostatin promoter are similar in regulation of muscle growth to that of other species, but mainly through specific regulatory elements. According to these results, we conducted a study to investigate the effect of viral infection on myostatin promoter activity and its regulation. The nervous necrosis virus (NNV) treatment significantly induced myostatin promoter activity. The present study is the first report describing that specific myostatin motifs regulate promoter activity and response to viral infection.
[Mh] Termos MeSH primário: Bass/genética
Bass/virologia
Proteínas de Peixes/genética
Miostatina/genética
Regiões Promotoras Genéticas/genética
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
Bass/imunologia
Elementos E-Box/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fish Proteins); 0 (Myostatin)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171017
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186506


  8 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28708460
[Au] Autor:Hasler CT; Bouyoucos IA; Suski CD
[Ti] Título:Tolerance to Hypercarbia Is Repeatable and Related to a Component of the Metabolic Phenotype in a Freshwater Fish.
[So] Source:Physiol Biochem Zool;90(5):583-587, 2017 Sep/Oct.
[Is] ISSN:1537-5293
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Freshwater fish may be exposed to high levels of carbon dioxide (CO ) because of several actions, including anesthesia and high levels of aquatic respiration and potentially as the result of using high-CO plumes as a barrier to the movements of invasive fishes. Metabolic phenotype can potentially drive how freshwater fish respond to high CO . We therefore quantified how tolerance (measured using time to equilibrium loss [ELT]) was driven by metabolic phenotype in a cosmopolitan freshwater fish species, Micropterus salmoides. ELT was repeatable, with 60% of the variance across trials attributable to individual differences. For each fish, standard metabolic rate and maximum metabolic rate were measured using respirometers and time to exhaustion after a chase test was recorded. Fish with high anaerobic performance were less tolerant to elevated CO , potentially as a result of preexisting metabolic acidosis. Standard metabolic rate and aerobic scope did not predict ELT. Our findings define which fish may be more vulnerable to high CO , a potential mechanism for this tolerance, and show that tolerance to high CO may be acted on by natural selection. Should freshwater ecosystems become elevated in CO , by either natural means or anthropogenic means, it is possible that there is potential for heritable selection of CO tolerance, evidenced by the fact that ELT was found to be repeatable.
[Mh] Termos MeSH primário: Adaptação Fisiológica/fisiologia
Bass/sangue
Bass/fisiologia
Dióxido de Carbono/sangue
[Mh] Termos MeSH secundário: Animais
Exposição Ambiental
Água Doce
Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
142M471B3J (Carbon Dioxide)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170715
[St] Status:MEDLINE
[do] DOI:10.1086/693376


  9 / 2409 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28610340
[Au] Autor:Laamiri S
[Ad] Endereço:Département de Biologie, Faculté des Sciences de Tunis, Université Tunis El Manar, 2092, Tunisie.. laamiri_sayef@ymail.com.
[Ti] Título:Myxosporea (Cnidaria : Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei : Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei : Serranidae) in Tunisia.
[So] Source:Zootaxa;4269(1):61-100, 2017 05 19.
[Is] ISSN:1175-5334
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:First parasitological surveys of Myxozoa are performed on the sparid saddled seabream Oblada melanura (Linnaeus, 1758) and the serranid painted comber Serranus scriba (Linnaeus, 1758) caught from the Bay of Bizerte and the Gulf of Tunis respectively in Northeast Tunisia, Western Mediterranean. In this study, 6 bivalvulid myxosporean species belonging to the 3 genera Ceratomyxa Thélohan, 1892, Myxodavisia Zhao, Zhou, Kent & Whipps, 2008 and Zschokkella Auerbach, 1910, are isolated infecting their hosts. Two species Ceratomyxa sp. 1 ex O. melanura (Prevalence (P) = 36%) and Ceratomyxa sp. 2 ex O. melanura (P = 13%) infected the saddled seabream and four species Ceratomyxa sp. 1 ex S. scriba (P = 11.7%), Ceratomyxa sp. 2 ex S. scriba (P = 6.7%), Myxodavisia sp. (P = 8.3%) and Zschokkella sp. (P = 5.6%) infected the painted comber. These myxosporeans differ, in vegetative stages and/or in mature spores, from all the previously known congeneric species, and are described here on the basis of their morphological and morphometric features, their host and tissue specificities and their biogeographical distribution. This is the first report of myxosporean infections in O. melanura and S. scriba. The occurrence of two ceratomyxid species in each host species supports that the genus Ceratomyxa is host-specific not only in sparids but also in serranids, which agrees with data previously obtained from Sparidae in Mediterranean Sea and from Serranidae in GBR, Australia. A member of the myxosporean genus Myxodavisia is recorded from the Mediterranean Sea for the first time, and Zschokkella spp. infections have not previously been recorded from a host in Serranidae. During the examination, a several cases of Co-infection among myxosporeans, both with two and three species, are provided and statistically studied. Indeed, 5% of the breams and 9.4% of the combers are infected with more than one myxosporean parasite. The relationship between myxosporean infections and some biological parameters are pointed out. A higher prevalence of myxosporean infection is coincided with the peak period of spawning activity in May-June for S. scriba. For both hosts, analysis using Fulton's condition factor (K) has revealed no significant difference between infected and non-infected fishes. Clinically, no external signs of disease have been occurred in infected hosts, but some changes in the bile fluid, colour, and viscosity and in the gall bladder 's tissue are examined in S. scriba.
[Mh] Termos MeSH primário: Cnidários
Dourada
[Mh] Termos MeSH secundário: Animais
Austrália
Bass
Doenças dos Peixes
Mar Mediterrâneo
Myxozoa
Doenças Parasitárias em Animais
Filogenia
Tunísia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170809
[Lr] Data última revisão:
170809
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170615
[St] Status:MEDLINE
[do] DOI:10.11646/zootaxa.4269.1.3


  10 / 2409 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28602910
[Au] Autor:Pinto PIS; Estêvão MD; Santos S; Andrade A; Power DM
[Ad] Endereço:Centre of Marine Sciences (CCMAR), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal. Electronic address: ppinto@ualg.pt.
[Ti] Título:In vitro screening for estrogenic endocrine disrupting compounds using Mozambique tilapia and sea bass scales.
[So] Source:Comp Biochem Physiol C Toxicol Pharmacol;199:106-113, 2017 Sep.
[Is] ISSN:1532-0456
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A wide range of estrogenic endocrine disruptors (EDCs) are accumulating in the environment and may disrupt the physiology of aquatic organisms. The effects of EDCs on fish have mainly been assessed using reproductive endpoints and in vivo animal experiments. We used a simple non-invasive assay to evaluate the impact of estrogens and EDCs on sea bass (Dicentrarchus labrax) and tilapia (Oreochromis mossambicus) scales. These were exposed to estradiol (E2), two phytoestrogens and six anthropogenic estrogenic/anti-estrogenic EDCs and activities of enzymes related to mineralized tissue turnover (TRAP, tartrate-resistant acid phosphatase and ALP, alkaline phosphatase) were measured. Semi-quantitative RT-PCR detected the expression of both membrane and nuclear estrogen receptors in the scales of both species, confirming scales as a target for E2 and EDCs through different mechanisms. Changes in TRAP or ALP activities after 30minute and 24h exposure were detected in sea bass and tilapia scales treated with E2 and three EDCs, although compound-, time- and dose-specific responses were observed for the two species. These results support again that the mineralized tissue turnover of fish is regulated by estrogens and reveals that the scales are a mineralized estrogen-responsive tissue that may be affected by some EDCs. The significance of these effects for whole animal physiology needs to be further explored. The in vitro fish scale bioassay is a promising non-invasive screening tool for E2 and EDCs effects, although the low sensitivity of TRAP/ALP quantification limits their utility and indicates that alternative endpoints are required.
[Mh] Termos MeSH primário: Bass/fisiologia
Disruptores Endócrinos/toxicidade
Estrogênios/toxicidade
Receptores Estrogênicos/metabolismo
Pele/efeitos dos fármacos
Tilápia/fisiologia
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Fosfatase Alcalina/metabolismo
Animais
Aquicultura
Bass/crescimento & desenvolvimento
Membrana Celular/efeitos dos fármacos
Membrana Celular/metabolismo
Núcleo Celular/efeitos dos fármacos
Núcleo Celular/metabolismo
Estradiol/toxicidade
Moduladores de Receptor Estrogênico/toxicidade
Proteínas de Peixes/genética
Proteínas de Peixes/metabolismo
Masculino
Fitoestrógenos/toxicidade
Portugal
Isoformas de Proteínas/genética
Isoformas de Proteínas/metabolismo
Receptores Estrogênicos/genética
Pele/química
Pele/crescimento & desenvolvimento
Pele/metabolismo
Especificidade da Espécie
Fosfatase Ácida Resistente a Tartarato/metabolismo
Tilápia/crescimento & desenvolvimento
Distribuição Tecidual
Testes de Toxicidade
Toxicocinética
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Endocrine Disruptors); 0 (Estrogen Receptor Modulators); 0 (Estrogens); 0 (Fish Proteins); 0 (Phytoestrogens); 0 (Protein Isoforms); 0 (Receptors, Estrogen); 0 (Water Pollutants, Chemical); 4TI98Z838E (Estradiol); EC 3.1.3.1 (Alkaline Phosphatase); EC 3.1.3.2 (Tartrate-Resistant Acid Phosphatase)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170809
[Lr] Data última revisão:
170809
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170613
[St] Status:MEDLINE



página 1 de 241 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

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