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[PMID]:27779310
[Au] Autor:Garzon-Villalba XP; Mbah A; Wu Y; Hiles M; Moore H; Schwartz SW; Bernard TE
[Ad] Endereço:College of Public Health, University of South Florida, Tampa, Florida.
[Ti] Título:Exertional heat illness and acute injury related to ambient wet bulb globe temperature.
[So] Source:Am J Ind Med;59(12):1169-1176, 2016 Dec.
[Is] ISSN:1097-0274
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The Deepwater Horizon disaster cleanup effort provided an opportunity to examine the effects of ambient thermal conditions on exertional heat illness (EHI) and acute injury (AI). METHODS: The outcomes were daily person-based frequencies of EHI and AI. Exposures were maximum estimated WBGT (WBGTmax) and severity. Previous day's cumulative effect was assessed by introducing previous day's WBGTmax into the model. RESULTS: EHI and AI were higher in workers exposed above a WBGTmax of 20°C (RR 1.40 and RR 1.06/°C, respectively). Exposures above 28°C-WBGTmax on the day of the EHI and/or the day before were associated with higher risk of EHI due to an interaction between previous day's environmental conditions and the current day (RRs from 1.0-10.4). CONCLUSIONS: The risk for EHI and AI were higher with increasing WBGTmax. There was evidence of a cumulative effect from the prior day's WBGTmax for EHI. Am. J. Ind. Med. 59:1169-1176, 2016. © 2016 Wiley Periodicals, Inc.
[Mh] Termos MeSH primário: Desastres
Transtornos de Estresse por Calor/etiologia
Temperatura Alta/efeitos adversos
Doenças Profissionais/etiologia
Poluição por Petróleo/efeitos adversos
[Mh] Termos MeSH secundário: Estudos Transversais
Golfo do México/epidemiologia
Transtornos de Estresse por Calor/epidemiologia
Seres Humanos
Umidade/efeitos adversos
Incidência
Doenças Profissionais/epidemiologia
Exposição Ocupacional/efeitos adversos
Esforço Físico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE
[do] DOI:10.1002/ajim.22650


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[PMID]:28337936
[Au] Autor:Relf R; Willmott A; Mee J; Gibson O; Saunders A; Hayes M; Maxwell N
[Ad] Endereço:a Centre for Sport and Exercise Science and Medicine (SESAME), Environmental Extremes Laboratory , University of Brighton , Eastbourne , UK.
[Ti] Título:Females exposed to 24 h of sleep deprivation do not experience greater physiological strain, but do perceive heat illness symptoms more severely, during exercise-heat stress.
[So] Source:J Sports Sci;36(3):348-355, 2018 Feb.
[Is] ISSN:1466-447X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:There is limited and inconclusive evidence surrounding the physiological and perceptual responses to heat stress while sleep deprived, especially for females. This study aimed to quantify the effect of 24 h sleep deprivation on physiological strain and perceptual markers of heat-related illness in females. Nine females completed two 30-min heat stress tests (HST) separated by 48 h in 39°C, 41% relative humidity at a metabolic heat production of 10 W · kg . The non-sleep deprived HST was followed by the sleep deprivation (SDHST) trial for all participants during the follicular phase of the menstrual cycle. Physiological and perceptual measures were recorded at 5 min intervals during the HSTs. On the cessation of the HSTs, heat illness symptom index (HISI) was completed. HISI scores increased after sleep deprivation by 28 ± 16 versus 20 ± 16 (P = 0.01). Peak (39.40 ± 0.35°C vs. 39.35 ± 0.33°C) and change in rectal temperature (1.91 ± 0.21 vs. 1.93 ± 0.34°C), and whole body sweat rate (1.08 ± 0.31 vs. 1.15 ± 0.36 L · h ) did not differ (P > 0.05) between tests. No difference was observed in peak, nor rise in: heart rate, mean skin temperature, perceived exertion or thermal sensation during the HSTs. Twenty-four hours sleep deprivation increased perceptual symptoms associated with heat-related illness; however, no thermoregulatory alterations were observed.
[Mh] Termos MeSH primário: Exercício/fisiologia
Exercício/psicologia
Transtornos de Estresse por Calor/fisiopatologia
Transtornos de Estresse por Calor/psicologia
Temperatura Alta
Percepção
Privação do Sono/fisiopatologia
Privação do Sono/psicologia
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Esforço Físico
Sudorese/fisiologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170325
[St] Status:MEDLINE
[do] DOI:10.1080/02640414.2017.1306652


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[PMID]:28455453
[Au] Autor:Volodina O; Ganesan S; Pearce SC; Gabler NK; Baumgard LH; Rhoads RP; Selsby JT
[Ad] Endereço:Department of Animal Science, Iowa State University, Ames, Iowa.
[Ti] Título:Short-term heat stress alters redox balance in porcine skeletal muscle.
[So] Source:Physiol Rep;5(8), 2017 Apr.
[Is] ISSN:2051-817X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Heat stress contributes to higher morbidity and mortality in humans and animals and is an agricultural economic challenge because it reduces livestock productivity. Redox balance and associated mitochondrial responses appear to play a central role in heat stress-induced skeletal muscle pathology. We have previously reported increased oxidative stress and mitochondrial content in oxidative muscle following 12 h of heat stress. The purposes of this investigation were to characterize heat stress-induced oxidative stress and changes in mitochondrial content and biogenic signaling in oxidative skeletal muscle. Crossbred gilts were randomly assigned to either thermal neutral (21°C;  = 8, control group) or heat stress (37°C) conditions for 2 h ( = 8), 4 h ( = 8), or 6 h ( = 8). At the end, their respective environmental exposure, the red portion of the semitendinosus muscle (STR) was harvested. Heat stress increased concentration of malondialdehyde (MDA) following 2 and 4 h compared to thermal neutral and 6 h, which was similar to thermal neutral, and decreased linearly with time. Protein carbonyl content was not influenced by environment. Catalase activity was increased following 4 h of heat stress and superoxide dismutase activity was decreased following 6 h of heat stress compared to thermal neutral conditions. Heat stress-mediated changes in antioxidant activity were independent of altered protein abundance or transcript expression. Mitochondrial content and mitochondrial biogenic signaling were similar between groups. These data demonstrate that heat stress caused a transient increase in oxidative stress that was countered by a compensatory change in catalase activity. These findings contribute to our growing understanding of the chronology of heat stress-induced intracellular dysfunctions in skeletal muscle.
[Mh] Termos MeSH primário: Transtornos de Estresse por Calor/metabolismo
Músculo Esquelético/metabolismo
Doenças dos Suínos/metabolismo
[Mh] Termos MeSH secundário: Animais
Retículo Endoplasmático/fisiologia
Transtornos de Estresse por Calor/fisiopatologia
Temperatura Alta/efeitos adversos
Masculino
Mitocôndrias Musculares/metabolismo
Músculo Esquelético/fisiopatologia
Biogênese de Organelas
Oxirredução
Estresse Oxidativo/fisiologia
Fenótipo
Sus scrofa
Suínos
Doenças dos Suínos/fisiopatologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170430
[St] Status:MEDLINE


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[PMID]:29212325
[Au] Autor:Lu Z; He X; Ma B; Zhang L; Li J; Jiang Y; Zhou G; Gao F
[Ad] Endereço:College of Animal Science and Technology, Key Laboratory of Animal Origin Food Production and Safety Guarantee of Jiangsu Province, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing Agricultural University , Nanjing 210095, P.R. China.
[Ti] Título:Chronic Heat Stress Impairs the Quality of Breast-Muscle Meat in Broilers by Affecting Redox Status and Energy-Substance Metabolism.
[So] Source:J Agric Food Chem;65(51):11251-11258, 2017 Dec 27.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We investigated the molecular mechanisms by which chronic heat stress impairs the breast-meat quality of broilers. Broilers were assigned to three groups: the normal control (NC) group, heat-stress (HS) group, and pair-fed (PF) group. After 7 days of heat exposure (32 °C), the high temperature had caused oxidative stress; elevated the activity of citrate synthase (CS), the mRNA expression of M-CPT1, and the phosphorylation level of AMPKα; and reduced the mRNA expression of avUCP. After 14 days of heat exposure, the heat stress had increased the lightness and drip loss and decreased the pH and shear force of the breast meat. Additionally, the heat exposure had increased the mRNA expressions of FAS, ACC, and PDK4; the content of lipids; and the activities of lactic dehydrogenase and pyruvate kinase, and it had decreased the mRNA expression of M-CPT1 and the activity of CS. In conclusion, chronic heat stress impairs meat quality by causing mitochondria to malfunction and affecting energy-substance aerobic metabolism, resulting in increased glycolysis and intramuscular fat deposition.
[Mh] Termos MeSH primário: Galinhas/fisiologia
Metabolismo Energético
Transtornos de Estresse por Calor/veterinária
Temperatura Alta/efeitos adversos
Carne/análise
Músculo Esquelético/metabolismo
Doenças das Aves Domésticas/metabolismo
[Mh] Termos MeSH secundário: Animais
Galinhas/genética
Citrato (si)-Sintase/genética
Citrato (si)-Sintase/metabolismo
Ácidos Graxos/análise
Ácidos Graxos/metabolismo
Feminino
Glicólise
Transtornos de Estresse por Calor/genética
Transtornos de Estresse por Calor/metabolismo
Masculino
Músculo Esquelético/química
Oxirredução
Doenças das Aves Domésticas/genética
Proteínas Quinases/genética
Proteínas Quinases/metabolismo
Estresse Fisiológico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fatty Acids); EC 2.3.3.1 (Citrate (si)-Synthase); EC 2.7.- (Protein Kinases); EC 2.7.1.- (AMP-activated protein kinase kinase)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171208
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b04428


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[PMID]:29176781
[Au] Autor:Dou S; Villa-Vialaneix N; Liaubet L; Billon Y; Giorgi M; Gilbert H; Gourdine JL; Riquet J; Renaudeau D
[Ad] Endereço:PEGASE, INRA, Agrocampus Ouest, St Gilles, France.
[Ti] Título:1HNMR-Based metabolomic profiling method to develop plasma biomarkers for sensitivity to chronic heat stress in growing pigs.
[So] Source:PLoS One;12(11):e0188469, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The negative impact of heat stress (HS) on the production performances in pig faming is of particular concern. Novel diagnostic methods are needed to predict the robustness of pigs to HS. Our study aimed to assess the reliability of blood metabolome to predict the sensitivity to chronic HS of 10 F1 (Large White × Creole) sire families (SF) reared in temperate (TEMP) and in tropical (TROP) regions (n = 56±5 offsprings/region/SF). Live body weight (BW) and rectal temperature (RT) were recorded at 23 weeks of age. Average daily feed intake (AFDI) and average daily gain were calculated from weeks 11 to 23 of age, together with feed conversion ratio. Plasma blood metabolome profiles were obtained by Nuclear Magnetic Resonance spectroscopy (1HNMR) from blood samples collected at week 23 in TEMP. The sensitivity to hot climatic conditions of each SF was estimated by computing a composite index of sensitivity (Isens) derived from a linear combination of t statistics applied to familial BW, ADFI and RT in TEMP and TROP climates. A model of prediction of sensitivity was established with sparse Partial Least Square Discriminant Analysis (sPLS-DA) between the two most robust SF (n = 102) and the two most sensitive ones (n = 121) using individual metabolomic profiles measured in TEMP. The sPLS-DA selected 29 buckets that enabled 78% of prediction accuracy by cross-validation. On the basis of this training, we predicted the proportion of sensitive pigs within the 6 remaining families (n = 337). This proportion was defined as the predicted membership of families to the sensitive category. The positive correlation between this proportion and Isens (r = 0.97, P < 0.01) suggests that plasma metabolome can be used to predict the sensitivity of pigs to hot climate.
[Mh] Termos MeSH primário: Biomarcadores/sangue
Transtornos de Estresse por Calor/metabolismo
Metabolômica
Suínos/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Animais
Regulação da Temperatura Corporal
Clima
Espectroscopia de Prótons por Ressonância Magnética
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Nm] Nome de substância:
0 (Biomarkers)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171226
[Lr] Data última revisão:
171226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171128
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188469


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[PMID]:29053741
[Au] Autor:Mehaisen GMK; Ibrahim RM; Desoky AA; Safaa HM; El-Sayed OA; Abass AO
[Ad] Endereço:Department of Animal Production, Faculty of Agriculture, Cairo University, Giza, Egypt.
[Ti] Título:The importance of propolis in alleviating the negative physiological effects of heat stress in quail chicks.
[So] Source:PLoS One;12(10):e0186907, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Heat stress is one of the most detrimental confrontations in tropical and subtropical regions of the world, causing considerable economic losses in poultry production. Propolis, a resinous product of worker honeybees, possesses several biological activities that could be used to alleviate the deleterious effects of high environmental temperature on poultry production. The current study was aimed at evaluating the effects of propolis supplementation to Japanese quail (Coturnix coturnix japonica) diets on the production performance, intestinal histomorphology, relative physiological and immunological parameters, and selected gene expression under heat stress conditions. Three hundred one-day-old Japanese quail chicks were randomly distributed into 20 wired-cages. At 28 d of age, the birds were divided into 2 temperature treatment groups; a normal at 24°C (C group) and a heat stress at 35°C (HS group). The birds in each group were further assigned to 2 subgroups; one of them was fed on a basal diet without propolis supplementation (-Pr subgroup) while the other was supplemented with propolis (+Pr subgroup). Production performance including body weight gain, feed intake and feed conversion ratio were measured. The intestinal histomorphological measurements were also performed for all treatment groups. Relative physiological parameters including body temperature, corticosterone hormone level, malondialdehyde (MDA) and free triiodothyronine hormone (fT3), as well as the relative immunological parameters including the total white blood cells count (TWBC's), heterophil/lymphocyte (H/L) ratio and lymphocyte proliferation index, were also measured. Furthermore, the mRNA expression for toll like receptor 5 (TLR5), cysteine-aspartic protease-6 (CASP6) and heat shock proteins 70 and 90 (Hsp70 and Hsp90) genes was quantified in this study. The quail production performance was significantly (P<0.05) impaired by HS treatment, while Pr treatment significantly improved the quail production performance. The villus width and area were significantly (P<0.05) lower in the HS compared to the C group, while Pr treatment significantly increased crypts depth of quail. A negative impact of HS treatment was observed on the physiological status of quail; however, propolis significantly alleviated this negative effect. Moreover, quail of the HS group expressed lower immunological parameters than C group, while propolis enhanced the immune status of the quail. The relative mRNA expression of TLR5 gene was down-regulated by HS treatment while it was up-regulated by the Pr treatment. Furthermore, the positive effects of propolis in HS-quail were evidenced by normalizing the high expressions of CASP6 and Hsp70 genes when compared to the C group. Based on these results, the addition of propolis to quail diets as a potential nutritional strategy in order to improve their performance, especially under heat stress conditions, is recommended.
[Mh] Termos MeSH primário: Coturnix/fisiologia
Transtornos de Estresse por Calor/prevenção & controle
Própole
[Mh] Termos MeSH secundário: Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
9009-62-5 (Propolis)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171113
[Lr] Data última revisão:
171113
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171021
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186907


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[PMID]:29036206
[Au] Autor:Schmeltz MT; Gamble JL
[Ad] Endereço:ASPPH/EPA Environmental Health Fellowship Program at the United States Environmental Protection Agency, Office of Research and Development, National Center for Environmental Assessment, Washington, DC, United States of America.
[Ti] Título:Risk characterization of hospitalizations for mental illness and/or behavioral disorders with concurrent heat-related illness.
[So] Source:PLoS One;12(10):e0186509, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Many studies have found significant associations between high ambient temperatures and increases in heat-related morbidity and mortality. Several studies have demonstrated that increases in heat-related hospitalizations are elevated among individuals with diagnosed mental illnesses and/or behavioral disorders (MBD). However, there are a limited number of studies regarding risk factors associated with specific mental illnesses that contribute, at least in part, to heat-related illnesses (HRI) in the United States. OBJECTIVE: To identify and characterize individual and environmental risk factors associated with MBD hospitalizations with a concurrent HRI diagnosis. METHODS: This study uses hospitalization data from the Nationwide Inpatient Sample (2001-2010). Descriptive analyses of primary and secondary diagnoses of MBDs with an HRI were examined. Risk ratios (RR) were calculated from multivariable models to identify risk factors for hospitalizations among patients with mental illnesses and/or behavioral disorders and HRI. RESULTS: Nondependent alcohol/drug abuse, dementia, and schizophrenia were among the disorders that were associated with increased frequency of HRI hospitalizations among MBD patients. Increased risk of MBD hospitalizations with HRI was observed for Males (RR, 3.06), African Americans (RR, 1.16), Native Americans (RR, 1.70), uninsured (RR, 1.92), and those 40 years and older, compared to MBD hospitalizations alone. CONCLUSIONS: Previous studies outside the U.S. have found that dementia and schizophrenia are significant risk factors for HRI hospitalizations. Our results suggest that hospitalizations among substance abusers may also be an important risk factor associated with heat morbidity. Improved understanding of these relative risks could help inform future public health strategies.
[Mh] Termos MeSH primário: Transtornos de Estresse por Calor/complicações
Hospitalização
Transtornos Mentais/complicações
Comportamento Problema
[Mh] Termos MeSH secundário: Adolescente
Adulto
Idoso
Criança
Pré-Escolar
Feminino
Transtornos de Estresse por Calor/psicologia
Transtornos de Estresse por Calor/terapia
Seres Humanos
Lactente
Masculino
Transtornos Mentais/psicologia
Transtornos Mentais/terapia
Meia-Idade
Análise Multivariada
Risco
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[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.0186509


  8 / 2411 MEDLINE  
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[PMID]:28877241
[Au] Autor:Mathes RW; Ito K; Lane K; Matte TD
[Ad] Endereço:New York City Department of Health and Mental Hygiene, Queens, New York, United States of America.
[Ti] Título:Real-time surveillance of heat-related morbidity: Relation to excess mortality associated with extreme heat.
[So] Source:PLoS One;12(9):e0184364, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The impact of heat on mortality is well documented but deaths tend to occur after (or lag) extreme heat events, and mortality data is generally not available for timely surveillance during extreme heat events. Recently, systems for near-real time surveillance of heat illness have been reported but have not been validated as predictors of non-external cause of deaths associated with extreme heat events. We analyzed associations between daily weather conditions, emergency medical system (EMS) calls flagged as heat-related by EMS dispatchers, emergency department (ED) visits classified as heat-related based on chief complaint text, and excess non-external cause mortality in New York City. EMS and ED data were obtained from data reported daily to the city health department for syndromic surveillance. We fit generalized linear models to assess the relationships of daily counts of heat related EMS and ED visits to non-external cause deaths after adjustment for weather conditions during the months of May-September between 1999 and 2013. Controlling for temporal trends, a 7% (95% confidence interval (CI): 2-12) and 6% (95% CI: 3-10) increase in non-external cause mortality was associated with an increase from the 50th percentile to 99th percentile of same-day and one-day lagged heat-related EMS calls and ED visits, respectively. After controlling for both temporal trends and weather, we observed a 7% (95% CI: 3-12) increase in non-external cause mortality associated with one-day lagged heat-related EMS calls and a 5% mortality increase with one-day lagged ED visits (95% CI: 2-8). Heat-related illness can be tracked during extreme heat events using EMS and ED data which are indicators of heat associated excess non-external cause mortality during the warm weather season.
[Mh] Termos MeSH primário: Serviços Médicos de Emergência/estatística & dados numéricos
Medicina de Emergência/estatística & dados numéricos
Serviço Hospitalar de Emergência/estatística & dados numéricos
Calor Extremo
Transtornos de Estresse por Calor/terapia
[Mh] Termos MeSH secundário: Algoritmos
Emergências
Seres Humanos
Modelos Lineares
Morbidade
Cidade de Nova Iorque
Estações do Ano
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170907
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184364


  9 / 2411 MEDLINE  
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[PMID]:28759571
[Au] Autor:Jastrebski SF; Lamont SJ; Schmidt CJ
[Ad] Endereço:Department of Animal and Food Sciences, University of Delaware, Newark, DE, United States of America.
[Ti] Título:Chicken hepatic response to chronic heat stress using integrated transcriptome and metabolome analysis.
[So] Source:PLoS One;12(7):e0181900, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The liver plays a central role in metabolism and is important in maintaining homeostasis throughout the body. This study integrated transcriptomic and metabolomic data to understand how the liver responds under chronic heat stress. Chickens from a rapidly growing broiler line were heat stressed for 8 hours per day for one week and liver samples were collected at 28 days post hatch. Transcriptome analysis reveals changes in genes responsible for cell cycle regulation, DNA replication, and DNA repair along with immune function. Integrating the metabolome and transcriptome data highlighted multiple pathways affected by heat stress including glucose, amino acid, and lipid metabolism along with glutathione production and beta-oxidation.
[Mh] Termos MeSH primário: Transtornos de Estresse por Calor/metabolismo
Fígado/crescimento & desenvolvimento
Fígado/metabolismo
Metaboloma
Transcriptoma
[Mh] Termos MeSH secundário: Animais
Galinhas
Análise por Conglomerados
DNA
Reparo do DNA
Replicação do DNA
Ácidos Graxos/metabolismo
Perfilação da Expressão Gênica
Glutationa/metabolismo
Resposta ao Choque Térmico/genética
Temperatura Alta
Sistema Imunitário
Metabolismo dos Lipídeos
Masculino
Oxigênio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fatty Acids); 9007-49-2 (DNA); GAN16C9B8O (Glutathione); S88TT14065 (Oxygen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171010
[Lr] Data última revisão:
171010
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170801
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0181900


  10 / 2411 MEDLINE  
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[PMID]:28650235
[Au] Autor:Unruh EM; Theurer ME; White BJ; Larson RL; Drouillard JS; Schrag N
[Ti] Título:Evaluation of infrared thermography as a diagnostic tool to predict heat stress events in feedlot cattle.
[So] Source:Am J Vet Res;78(7):771-777, 2017 Jul.
[Is] ISSN:1943-5681
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE To determine whether infrared thermographic images obtained the morning after overnight heat abatement could be used as the basis for diagnostic algorithms to predict subsequent heat stress events in feedlot cattle exposed to high ambient temperatures. ANIMALS 60 crossbred beef heifers (mean ± SD body weight, 385.8 ± 20.3 kg). PROCEDURES Calves were housed in groups of 20 in 3 pens without any shade. During the 6 am and 3 pm hours on each of 10 days during a 14-day period when the daily ambient temperature was forecasted to be > 29.4°C, an investigator walked outside each pen and obtained profile digital thermal images of and assigned panting scores to calves near the periphery of the pen. Relationships between infrared thermographic data and panting scores were evaluated with artificial learning models. RESULTS Afternoon panting score was positively associated with morning but not afternoon thermographic data (body surface temperature). Evaluation of multiple artificial learning models indicated that morning body surface temperature was not an accurate predictor of an afternoon heat stress event, and thermographic data were of little predictive benefit, compared with morning and forecasted weather conditions. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated infrared thermography was an objective method to monitor beef calves for heat stress in research settings. However, thermographic data obtained in the morning did not accurately predict which calves would develop heat stress later in the day. The use of infrared thermography as a diagnostic tool for monitoring heat stress in feedlot cattle requires further investigation.
[Mh] Termos MeSH primário: Doenças dos Bovinos/diagnóstico
Transtornos de Estresse por Calor/veterinária
Termografia/veterinária
[Mh] Termos MeSH secundário: Animais
Bovinos
Feminino
Transtornos de Estresse por Calor/diagnóstico
Temperatura Alta
Tempo (Meteorologia)
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171108
[Lr] Data última revisão:
171108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170627
[St] Status:MEDLINE
[do] DOI:10.2460/ajvr.78.7.771



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