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https://www.readbyqxmd.com/read/28231695/blood-amino-acids-profile-responding-to-heat-stress-in-dairy-cows
#1
Jiang Guo, Shengtao Gao, Suyu Quan, Yangdong Zhang, Dengpan Bu, Jiaqi Wang
The objective of this experiment was to investigate the effects of heat stress on milk protein and blood amino acid profile in dairy cows. Twelve dairy cows with the similar parity, days in milk and milk yield were randomly divided into two groups with six cows raised in summer and others in autumn, respectively. Constant managerial conditions and diets were maintained during the experiment. Measurements and samples for heat stress and no heat stress were obtained according to the physical alterations of the temperature-humidity index...
February 23, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28231604/variations-in-body-morphology-explain-gender-differences-in-thermoeffector-function-during-compensable-heat-stress
#2
Sean R Notley, Joonhee Park, Kyoko Tagami, Norikazu Ohnishi, Nigel A S Taylor
Gender is sometimes thought to independently modulate cutaneous vasomotor and sudomotor function during heat exposure. Nevertheless, it was hypothesised that, when assessed during compensable exercise that evoked equal heat-loss requirements across participants, gender differences in those thermoeffectors would be explained by variations in the ratio between body surface area and mass (specific surface area). To evaluate that possibility, vasomotor and sudomotor functions were assessed in sixty individuals (36 males, 24 females) with widely varying (overlapping) specific surface areas (range: 232...
February 23, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28231501/hsp70-expression-in-biomphalaria-glabrata-snails-exposed-to-cadmium
#3
Rebeca da Silva Cantinha, Sueli Ivone Borrely, Nancy Oguiura, Carlos Alberto de Bragança Pereira, Marcela M Rigolon, Eliana Nakano
In this study, the effects of the heavy metal cadmium on the stress protein HSP70 are investigated in freshwater mollusks Biomphalaria glabrata. Adult snails were exposed for 96h to CdCl2 at concentrations ranging from 0.09 to 0.7mgL(-1) (LC50/96h=0.34 (0.30-0.37). Time and concentration-dependent increases in the expression of HSP70 were observed at sub-lethal levels in the immunoblotting assay. Further, an increased survival to a lethal heat shock was observed in animals pre-exposed to a nonlethal concentration of cadmium, evidencing the induction of acquired tolerance...
February 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28231279/lysine-acetyltransferase-nua4-and-acetyl-coa-regulate-glucose-deprived-stress-granule-formation-in-saccharomyces-cerevisiae
#4
Meaghen Rollins, Sylvain Huard, Alan Morettin, Jennifer Takuski, Trang Thuy Pham, Morgan D Fullerton, Jocelyn Côté, Kristin Baetz
Eukaryotic cells form stress granules under a variety of stresses, however the signaling pathways regulating their formation remain largely unknown. We have determined that the Saccharomyces cerevisiae lysine acetyltransferase complex NuA4 is required for stress granule formation upon glucose deprivation but not heat stress. Further, the Tip60 complex, the human homolog of the NuA4 complex, is required for stress granule formation in cancer cell lines. Surprisingly, the impact of NuA4 on glucose-deprived stress granule formation is partially mediated through regulation of acetyl-CoA levels, which are elevated in NuA4 mutants...
February 23, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28231151/increase-of-chamazulene-and-%C3%AE-bisabolol-contents-of-the-essential-oil-of-german-chamomile-matricaria-chamomilla-l-using-salicylic-acid-treatments-under-normal-and-heat-stress-conditions
#5
Mojtaba Ghasemi, Nadali Babaeian Jelodar, Mohammad Modarresi, Nadali Bagheri, Abbas Jamali
The chamazulene and α-(-)-bisabolol contents and quality of the chamomile oil are affected by genetic background and environmental conditions. Salicylic acid (SA), as a signaling molecule, plays a significant role in the plant physiological processes. The aim of this study was to evaluate the chemical profile, quantity, and improve the essential oil quality as a consequence of the increase of chamazulene and α-(-)-bisabol using salicylic acid under normal and heat stress conditions by the gas chromatography-mass spectrometry (GC-MS) technique...
August 27, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231147/applying-least-absolute-shrinkage-selection-operator-and-akaike-information-criterion-analysis-to-find-the-best-multiple-linear-regression-models-between-climate-indices-and-components-of-cow-s-milk
#6
Mohammad Reza Marami Milani, Andreas Hense, Elham Rahmani, Angelika Ploeger
This study focuses on multiple linear regression models relating six climate indices (temperature humidity THI, environmental stress ESI, equivalent temperature index ETI, heat load HLI, modified HLI (HLI new), and respiratory rate predictor RRP) with three main components of cow's milk (yield, fat, and protein) for cows in Iran. The least absolute shrinkage selection operator (LASSO) and the Akaike information criterion (AIC) techniques are applied to select the best model for milk predictands with the smallest number of climate predictors...
July 23, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231090/correction-ghasemi-m-et-al-increase-of-chamazulene-and-%C3%AE-bisabolol-contents-of-the-essential-oil-of-german-chamomile-matricaria-chamomilla-l-using-salicylic-acid-treatments-under-normal-and-heat-stress-conditions-foods-2016-5-56
#7
Mojtaba Ghasemi, Nadali Babaeian Jelodar, Mohammad Modarresi, Nadali Bagheri, Abbas Jamali
The authors wish to make the following corrections to their paper [...].
February 8, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231066/valuing-environmental-health-for-informed-policy-making
#8
Vojtěch Máca, Jan Melichar, Milan Ščasný, Markéta Braun Kohlová
BACKGROUND: Monetized environmental health impact assessments help to better evaluate the environmental burden of a wide range of economic activities. Apart from the limitations and uncertainties in physical and biological science used in such assessments, assumptions taken from economic valuation may also substantially influence subsequent policy-making considerations. AIM: This study attempts to demonstrate the impact of normative policy assumptions on quantified external costs using a case study of recently discussed variants of future coal mining and use of extracted coal in electricity and heat generation in the Czech Republic...
February 23, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28231050/original-research-paper-pulmonary-prophylactic-impact-of-melatonin-and-or-quercetin-a-novel-therapy-for-inflammatory-hypoxic-stress-in-rats
#9
Nouf M Al-Rasheed, Laila Fadda, Hala A Attia, Iman A Sharaf, Azza M Mohamed, Nawal M Al-Rasheed
The study aims to compare, through histological and biochemical studies, the effects of quercetin, melatonin and their combination in regulation of immuno-inflammatory mediators and heat shock protein expressions in sodium nitrite induced hypoxia in rat lungs. The results revealed that NaNO2 injection caused a significant decrease in Hb in rats, while serum levels of TNF-α, IL-6 and CRP, VEGF and HSP70 were elevated compared to the control group. Administration of melatonin, quercetin or their combination before NaNO2 injection markedly reduced these parameters...
March 1, 2017: Acta Pharmaceutica
https://www.readbyqxmd.com/read/28230268/potential-climate-change-health-risks-from-increases-in-heat-waves-abnormal-birth-outcomes-and-adverse-maternal-health-conditions
#10
Gulcan Cil, Trudy Ann Cameron
We investigate the risks presented by heat waves for adverse health conditions for babies and expectant mothers when these mothers have been exposed to heat waves during gestation or during the period just prior to conception. Rather than just birth weight and gestational age, we focus on less common metrics such as abnormal conditions in the newborn (fetal distress, reliance on a ventilator, and meconium aspiration) and adverse health conditions in the mother (pregnancy-related hypertension, uterine bleeding during pregnancy, eclampsia, and incompetent cervix)...
February 23, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28229498/bax-and-bcl-2-are-involved-in-the-apoptosis-induced-by-local-testicular-heating-in-the-boar-testis
#11
H Xi, X Fan, Z Zhang, Y Liang, Q Li, J He
The aim of this study was to determine whether the effect of Bax and Bcl-2 on the apoptosis of germ cells is caused by local testicular heating (42°C, 1 hr) in boar testis. The testes of three boars were exposed to 42°C for 1 hr. Three other boars were assigned as control (no heat treatment). After 6 hr of heat treatment, all boars were castrated and the testes were harvested. Immunohistochemical results showed that a redistribution of Bax was caused by heat stress, and Bcl-2 was expressed in the cytoplasm and nucleus...
February 23, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28228418/folic-acid-supplementation-increases-cutaneous-vasodilator-sensitivity-to-sympathetic-nerve-activity-in-older-adults
#12
Anna E Stanhewicz, Jody L Greaney, Lacy M Alexander, W Larry Kenney
During heat stress, blunted increases in skin sympathetic nervous system activity (SSNA) and reductions in end-organ vascular responsiveness contribute to the age-related reduction in reflex cutaneous vasodilation. In older adults, folic acid supplementation improves the cutaneous vascular conductance (CVC) response to passive heating; however, the influence of folic acid supplementation on SSNA:CVC transduction is unknown. Fourteen older adults (66±1yrs, 8M/6F) ingested folic acid (5mg·day(-1)) or placebo for 6 weeks in a randomized, double-blind, crossover design...
February 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28228180/age-related-oxidative-stress-and-antioxidant-capacity-in-heat-stressed-broilers
#13
A P Del Vesco, A S Khatlab, E S R Goes, K S Utsunomiya, J S Vieira, A R Oliveira Neto, E Gasparino
We aimed to evaluate the effects of acute heat stress (HS) and age on the redox state in broilers aged 21 and 42 days. We evaluated the expression of genes related to antioxidant capacity, the production of hydrogen peroxide (H2O2), and the activity of antioxidant enzymes in the liver, as well as oxidative stress markers in the liver and plasma. The experiment had a completely randomized factorial design with two thermal environments (thermoneutral and HS, 38°C for 24 h) and two ages (21 and 42 days). Twenty-one-day-old animals exposed to HS showed the highest thioredoxin reductase 1 (TrxR1) (P<0...
February 23, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28225183/protective-effects-of-araloside-c-against-myocardial-ischaemia-reperfusion-injury-potential-involvement-of-heat-shock-protein-90
#14
Min Wang, Yu Tian, Yu-Yang Du, Gui-Bo Sun, Xu-Dong Xu, Hai Jiang, Hui-Bo Xu, Xiang-Bao Meng, Jing-Yi Zhang, Shi-Lan Ding, Miao-di Zhang, Ming-Hua Yang, Xiao-Bo Sun
The present study was designed to investigate whether Araloside C, one of the major triterpenoid compounds isolated from Aralia elata known to be cardioprotective, can improve heart function following ischaemia/reperfusion (I/R) injury and elucidate its underlying mechanisms. We observed that Araloside C concentration-dependently improved cardiac function and depressed oxidative stress induced by I/R. Similar protection was confirmed in isolated cardiomyocytes characterized by maintaining Ca(2+) transients and cell shortening against I/R...
February 22, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28224564/increased-glucocorticoid-receptor-expression-in-sepsis-is-related-to-heat-shock-proteins-cytokines-and-cortisol-and-is-associated-with-increased-mortality
#15
Konstantinos Vardas, Stavroula Ilia, Amalia Sertedaki, Evangelia Charmandari, Efrossini Briassouli, Dimitris Goukos, Kleovoulos Apostolou, Katerina Psarra, Efthimia Botoula, Stylianos Tsagarakis, Eleni Magira, Christina Routsi, Constantine A Stratakis, Serafim Nanas, George Briassoulis
BACKGROUND: The purposes of this study are to examine if the human glucocorticoid receptor (hGR) isoform-α mRNA and hGR protein expressions are deficient in the acute phase of sepsis (S) compared to systemic inflammatory response syndrome (SIRS) and healthy subjects (H) and to evaluate if the hGRα and hGR alterations are associated with cortisol changes and if they are related to (1) extracellular and intracellular heat shock proteins (HSP) 72 and 90α; (2) ACTH, prolactin, and interleukins (ILs); and (3) outcome...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28223795/nanoparticle-based-hyperthermia-distinctly-impacts-production-of-ros-expression-of-ki-67-top2a-and-tpx2-and-induction-of-apoptosis-in-pancreatic-cancer
#16
Robert Ludwig, Francisco J Teran, Ulf Teichgraeber, Ingrid Hilger
So far, the therapeutic outcome of hyperthermia has shown heterogeneous responses depending on how thermal stress is applied. We studied whether extrinsic heating (EH, hot air) and intrinsic heating (magnetic heating [MH] mediated by nanoparticles) induce distinct effects on pancreatic cancer cells (PANC-1 and BxPC-3 cells). The impact of MH (100 µg magnetic nanoparticles [MNP]/mL; H=23.9 kA/m; f=410 kHz) was always superior to that of EH. The thermal effects were confirmed by the following observations: 1) decreased number of vital cells, 2) altered expression of pro-caspases, and 3) production of reactive oxygen species, and 4) altered mRNA expression of Ki-67, TOP2A, and TPX2...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28223714/comparative-physiological-and-transcriptomic-analyses-provide-integrated-insight-into-osmotic-cold-and-salt-stress-tolerance-mechanisms-in-banana
#17
Wei Hu, Zehong Ding, Weiwei Tie, Yan Yan, Yang Liu, Chunlai Wu, Juhua Liu, Jiashui Wang, Ming Peng, Biyu Xu, Zhiqiang Jin
The growth, development, and production of banana plants are constrained by multiple abiotic stressors. However, it remains elusive for the tolerance mechanisms of banana responding to multiple abiotic stresses. In this study, we found that Fen Jiao (FJ) was more tolerant to osmotic, cold, and salt stresses than BaXi Jiao (BX) by phenotypic and physiological analyses. Comparative transcriptomic analyses highlighted stress tolerance genes that either specifically regulated in FJ or changed more than twofold in FJ relative to BX after treatments...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28223317/stabilized1-modulates-pre-mrna-splicing-for-thermotolerance
#18
Geundon Kim, Young-Hee Cho, Byeong-Ha Lee, Sang-Dong Yoo
High temperature stress often leads to differential RNA splicing, thus accumulating different types and/or amounts of mature mRNAs in eukaryotic cells. However, regulatory mechanisms underlying plant pre-mRNA splicing in the environmental stress conditions remain elusive. Herein, we describe that a U5-snRNP-interacting protein homolog STABILIZED1 (STA1) has pre-mRNA splicing activity for heat-inducible transcripts including HEAT STRESS TRANSCRIPTION FACTORS and various HEAT SHOCK PROTEINS for the establishment of heat stress tolerance in Arabidopsis thaliana...
February 21, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28222239/evolutionary-rescue-and-local-adaptation-under-different-rates-of-temperature-increase-a-combined-analysis-of-changes-in-phenotype-expression-and-genotype-frequency-in-paramecium-microcosms
#19
Joshua Killeen, Claire Gougat-Barbera, Sascha Krenek, Oliver Kaltz
Evolutionary Rescue (ER) occurs when populations, which have declined due to rapid environmental change, recover through genetic adaptation. The success of this process and the evolutionary trajectory of the population strongly depend on the rate of environmental change. Here we investigated how different rates of temperature increase (from 23°C to 32°C) affect population persistence and evolutionary change in experimental microcosms of the protozoan Paramecium caudatum. Consistent with theory on ER, we found that those populations experiencing the slowest rate of temperature increase were the least likely to become extinct and tended to be the best adapted to the new temperature environment...
February 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28221847/thermal-and-starvation-stress-response-of-escherichia-coli-o157-h7-isolates-selected-from-agricultural-environments
#20
Achyut Adhikari, Andy Bary, Craig Cogger, Caleb James, Gülhan Ünlü, Karen Killinger
Pathogens exposed to agricultural production environments are subject to multiple stresses that may alter their survival under subsequent stress conditions. The objective of this study was to examine heat and starvation stress response of Escherichia coli O157:H7 strains isolated from agricultural matrices. Seven E. coli O157:H7 isolates from different agricultural matrices-soil, compost, irrigation water, and sheep manure-were selected, and two ATCC strains were used as controls. The E. coli O157:H7 isolates were exposed to heat stress (56°C in 0...
October 2016: Journal of Food Protection
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