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https://www.readbyqxmd.com/read/29237575/acclimation-capacity-of-the-cardiac-hsp70-and-hsp90-response-to-thermal-stress-in-lake-trout-salvelinus-namaycush-a-stenothermal-ice-age-relict
#1
Nicholas I Kelly, Chris C Wilson, Suzanne Currie, Gary Burness
The ability of cold-adapted species to persist in the face of climate change will depend on the capacity of individuals for thermal acclimation, adaptation, and the degree of physiological variation that exists among populations. We tested the acclimation capacity of cardiac HSP70 and HSP90 in four populations of lake trout (Salvelinus namaycush), a cold-adapted salmonid. We acclimated fish to four temperatures (8°C, 11°C, 15°C, and 19°C) and measured cardiac HSP70 and HSP90 levels by western blot prior to and following an acute (1h) heat shock at 23°C...
December 10, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29158138/different-ecophysiological-responses-of-freshwater-fish-to-warming-and-acidification
#2
Tiago F Jesus, Inês C Rosa, Tiago Repolho, Ana R Lopes, Marta S Pimentel, Vera M F Almeida-Val, Maria M Coelho, Rui Rosa
Future climate change scenarios predict threatening outcomes to biodiversity. Available empirical data concerning biological response of freshwater fish to climate change remains scarce. In this study, we investigated the physiological and biochemical responses of two Iberian freshwater fish species (Squalius carolitertii and the endangered S. torgalensis), inhabiting different climatic conditions, to projected future scenarios of warming (+3°C) and acidification (ΔpH=-0.4). Herein, metabolic enzyme activities of glycolytic (citrate synthase - CS, lactate dehydrogenase - LDH) and antioxidant (glutathione S-transferase, catalase and superoxide dismutase) pathways, as well as the heat shock response (HSR) and lipid peroxidation were determined...
November 17, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/29151575/new-science-of-climate-change-impacts-on-agriculture-implies-higher-social-cost-of-carbon
#3
Frances C Moore, Uris Baldos, Thomas Hertel, Delavane Diaz
Despite substantial advances in climate change impact research in recent years, the scientific basis for damage functions in economic models used to calculate the social cost of carbon (SCC) is either undocumented, difficult to trace, or based on a small number of dated studies. Here we present new damage functions based on the current scientific literature and introduce these into an integrated assessment model (IAM) in order to estimate a new SCC. We focus on the agricultural sector, use two methods for determining the yield impacts of warming, and the GTAP CGE model to calculate the economic consequences of yield shocks...
November 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29146915/transcriptional-profiling-provides-new-insights-into-the-role-of-nitric-oxide-in-enhancing-ganoderma-oregonense-resistance-to-heat-stress
#4
Cheng Chen, Qiang Li, Qiangfeng Wang, Daihua Lu, Hong Zhang, Jian Wang, Rongtao Fu
Ganoderma is well known for its use in traditional Chinese medicine and is widely cultivated in China, Korea, and Japan. Increased temperatures associated with global warming are negatively influencing the growth and development of Ganoderma. Nitric oxide is reported to play an important role in alleviating fungal heat stress (HS). However, the transcriptional profiling of Ganoderma oregonense in response to HS, as well as the transcriptional response regulated by NO to cope with HS has not been reported. We used RNA-Seq technology to generate large-scale transcriptome data from G...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29142326/complex-organic-molecules-in-strongly-uv-irradiated-gas
#5
S Cuadrado, J R Goicoechea, J Cernicharo, A Fuente, J Pety, B Tercero
We investigate the presence of complex organic molecules (COMs) in strongly UV-irradiated interstellar molecular gas. We have carried out a complete millimetre (mm) line survey using the IRAM 30 m telescope towards the edge of the Orion Bar photodissociation region (PDR), close to the H2 dissociation front, a position irradiated by a very intense far-UV (FUV) radiation field. These observations have been complemented with 8.5″ resolution maps of the H2CO JKa,Kc = 51,5 → 41,4 and C(18)O J = 3 → 2 emission at 0...
July 2017: Astronomy and Astrophysics
https://www.readbyqxmd.com/read/29133228/effects-of-cold-acclimation-on-rectal-macromorphology-ultrastructure-and-cytoskeletal-stability-in-gryllus-pennsylvanicus-crickets
#6
Lauren E Des Marteaux, Joseph R Stinziano, Brent J Sinclair
Cold-acclimated insects maintain ion and water balance in the cold, potentially by reducing permeability or increasing diffusion distance across ionoregulatory epithelia such as the rectum. We explored whether cold acclimation induces structural modifications that minimize water and ion diffusion across the rectum and maintain rectal cell integrity. We investigated rectal structure and cytoskeletal stability in chill-susceptible adult Gryllus pennsylvanicus crickets acclimated for one week to either warm (25°C) or cold (12°C) conditions...
November 10, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29132006/ocean-acidification-dampens-physiological-stress-response-to-warming-and-contamination-in-a-commercially-important-fish-argyrosomus-regius
#7
Eduardo Sampaio, Ana R Lopes, Sofia Francisco, Jose R Paula, Marta Pimentel, Ana L Maulvault, Tiago Repolho, Tiago F Grilo, Pedro Pousão-Ferreira, António Marques, Rui Rosa
Increases in carbon dioxide (CO2) and other greenhouse gases emissions are changing ocean temperature and carbonate chemistry (warming and acidification, respectively). Moreover, the simultaneous occurrence of highly toxic and persistent contaminants, such as methylmercury, will play a key role in further shaping the ecophysiology of marine organisms. Despite recent studies reporting mostly additive interactions between contaminant and climate change effects, the consequences of multi-stressor exposure are still largely unknown...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29126631/antioxidant-response-to-heat-stress-in-seagrasses-a-gene-expression-study
#8
O Tutar, L Marín-Guirao, J M Ruiz, G Procaccini
Seawater warming associated to the ongoing climate change threatens functioning and survival of keystone coastal benthic species such as seagrasses. Under elevated temperatures, the production of reactive oxygen species (ROS) is increased and plants must activate their antioxidant defense mechanisms to protect themselves from oxidative damage. Here we explore from a molecular perspective the ability of Mediterranean seagrasses to activate heat stress response mechanisms, with particular focus on antioxidants...
December 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/29052324/effect-of-heat-stress-during-in-vitro-maturation-on-developmental-competence-of-vitrified-bovine-oocytes
#9
M Vendrell-Flotats, N Arcarons, E Barau, M López-Béjar, T Mogas
Heat-shock protein 70 (HSP70) plays a crucial role as intracellular cytoprotectant and molecular chaperone. A phenomenon of heat stress (HS) leads to production of these proteins that could be beneficial to cells during cryopreservation, which is also a stressful process for the cell. This study aimed to evaluate the protective effect of exposure of bovine oocytes to moderate HS during in vitro maturation (IVM) prior vitrification. First, oocytes were subjected to HS (41.5°C for 1 hr) at 0, 4, 8, 12 or 16 of IVM...
October 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29045028/biological-effects-of-er-yag-laser-irradiation-on-the-proliferation-of-primary-human-gingival-fibroblasts
#10
Sophannary Kong, Akira Aoki, Kengo Iwasaki, Koji Mizutani, Sayaka Katagiri, Tomonari Suda, Shizuko Ichinose, Mayumi Ogita, Verica Pavlic, Yuichi Izumi
We investigated the biological effects of Er:YAG laser (2,940-nm; DELight(®) , HOYA ConBio, USA) irradiation at fluences of 3.6, 4.2, 4.9, 6.3, 8.1, or 9.7 J cm(-2) at 20 or 30 Hz for 20 or 30 s on primary human gingival fibroblasts (HGFs). Irradiation at 6.3 J cm(-2) promoted maximal cell proliferation, determined by WST-8 assay and crystal violet staining, but was accompanied by lactate dehydrogenase release, on day 3 post-irradiation. Elevation of ATP level, Ki67 staining, and cyclin-A2 mRNA expression confirmed that Er:YAG affected the cell cycle and increased the number of proliferating cells...
October 17, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28977817/global-warming-and-obesity-a-systematic-review
#11
REVIEW
R An, M Ji, S Zhang
Global warming and the obesity epidemic are two unprecedented challenges mankind faces today. A literature search was conducted in the PubMed, Web of Science, EBSCO and Scopus for articles published until July 2017 that reported findings on the relationship between global warming and the obesity epidemic. Fifty studies were identified. Topic-wise, articles were classified into four relationships - global warming and the obesity epidemic are correlated because of common drivers (n = 21); global warming influences the obesity epidemic (n = 13); the obesity epidemic influences global warming (n = 13); and global warming and the obesity epidemic influence each other (n = 3)...
October 4, 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28956008/skin-mucus-proteins-of-lumpsucker-cyclopterus-lumpus
#12
Deepti Manjari Patel, Monica F Brinchmann
Fish skin mucus serves as a first line of defense against pathogens and external stressors. In this study the proteomic profile of lumpsucker skin mucus was characterized using 2D gels coupled with tandem mass spectrometry. Mucosal proteins were identified by homology searches across the databases SwissProt, NCBInr and vertebrate EST. The identified proteins were clustered into ten groups based on their gene ontology biological process in PANTHER (www.patherdb.org). Calmodulin, cystatin-B, histone H2B, peroxiredoxin1, apolipoprotein A1, natterin-2, 14-3-3 protein, alfa enolase, pentraxin, warm temperature acclimation 65 kDa (WAP65kDa) and heat shock proteins were identified...
March 2017: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28944271/the-effect-of-passive-heating-on-heat-shock-protein-70-and-interleukin-6-a-possible-treatment-tool-for-metabolic-diseases
#13
S H Faulkner, S Jackson, G Fatania, C A Leicht
Increasing physical activity remains the most widely publicized way of improving health and wellbeing. However, in populations that benefit most from exercise (EX), adherence is often poor and alternatives to EX are important to bring about health improvements. Recent work suggests a role for passive heating (PH) and heat shock proteins (HSP) in improving cardio-metabolic health. The aim of this study was to investigate the expression of HSP70 and interleukin-6 in response to either EX or PH and the subsequent effect on glucose control...
2017: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/28893714/transcriptional-regulation-of-the-ambient-temperature-response-by-h2a-z-nucleosomes-and-hsf1-transcription-factors-in-arabidopsis
#14
Sandra Cortijo, Varodom Charoensawan, Anna Brestovitsky, Ruth Buning, Charles Ravarani, Daniela Rhodes, John van Noort, Katja E Jaeger, Philip A Wigge
Temperature influences the distribution, range, and phenology of plants. The key transcriptional activators of heat shock response in eukaryotes, the heat shock factors (HSFs), have undergone large-scale gene amplification in plants. While HSFs are central in heat stress responses, their role in the response to ambient temperature changes is less well understood. We show here that the warm ambient temperature transcriptome is dependent upon the HSFA1 clade of Arabidopsis HSFs, which cause a rapid and dynamic eviction of H2A...
October 9, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28882792/hypothermal-stress-induced-differential-expression-profiles-of-the-immune-response-gene-warm-temperature-acclimation-associated-65-kda-protein-wap65-in-the-liver-of-fresh-water-and-seawater-milkfish-chanos-chanos
#15
Chia-Hao Chang, Jing-Yun Lin, Wan-Yu Lo, Tsung-Han Lee
The milkfish (Chanos chanos), an important aquaculture species, is intolerant to cold environments. Temperature fluctuations in the environment affect the physiological response, behavior, and survival rate of the fish. The warm-temperature-acclimation associated 65-kDa protein (Wap65) of teleosts was identified after heat shock treatment and has two isoforms. Both the isoforms were involved in the induction of immune responses in fish. They showed high degree of sequence conservation with the mammalian hemopexin and had high affinity for heme, which helped in the neutralization of free-heme and its transport to the liver...
September 4, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28867132/symbiont-dynamics-during-thermal-acclimation-using-cnidarian-dinoflagellate-model-holobionts
#16
Laura Núñez-Pons, Iacopo Bertocci, Garen Baghdasarian
Warming oceans menace reef ecosystems by disrupting symbiosis between cnidarians and Symbiodinium zooxanthellae, thus triggering bleach episodes. Temperature fluctuations promote adjustments in physiological variables and symbiont composition, which can cause stress responses, but can also yield adaptation if fitter host-symbiont homeostasis are achieved. To understand such processes manipulative studies are required, but many reef-building cnidarians pose limitations to experimental prospects. We exposed Exaiptasia anemones to Gradual Thermal Stress (GTS) and Heat Shock (HS) exposures and monitored chlorophyll and symbiont dynamics to test the phenotypic plasticity of these photosynthetic holobionts...
August 24, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28832555/impact-of-soil-warming-on-the-plant-metabolome-of-icelandic-grasslands
#17
Albert Gargallo-Garriga, Marta Ayala-Roque, Jordi Sardans, Mireia Bartrons, Victor Granda, Bjarni D Sigurdsson, Niki I W Leblans, Michal Oravec, Otmar Urban, Ivan A Janssens, Josep Peñuelas
Climate change is stronger at high than at temperate and tropical latitudes. The natural geothermal conditions in southern Iceland provide an opportunity to study the impact of warming on plants, because of the geothermal bedrock channels that induce stable gradients of soil temperature. We studied two valleys, one where such gradients have been present for centuries (long-term treatment), and another where new gradients were created in 2008 after a shallow crustal earthquake (short-term treatment). We studied the impact of soil warming (0 to +15 °C) on the foliar metabolomes of two common plant species of high northern latitudes: Agrostis capillaris, a monocotyledon grass; and Ranunculus acris, a dicotyledonous herb, and evaluated the dependence of shifts in their metabolomes on the length of the warming treatment...
August 23, 2017: Metabolites
https://www.readbyqxmd.com/read/28806748/temperature-effects-on-gene-expression-and-morphological-development-of-european-eel-anguilla-anguilla-larvae
#18
Sebastian N Politis, David Mazurais, Arianna Servili, Jose-Luis Zambonino-Infante, Joanna J Miest, Sune R Sørensen, Jonna Tomkiewicz, Ian A E Butts
Temperature is important for optimization of rearing conditions in aquaculture, especially during the critical early life history stages of fish. Here, we experimentally investigated the impact of temperature (16, 18, 20, 22 and 24°C) on thermally induced phenotypic variability, from larval hatch to first-feeding, and the linked expression of targeted genes [heat shock proteins (hsp), growth hormone (gh) and insulin-like growth factors (igf)] associated to larval performance of European eel, Anguilla anguilla...
2017: PloS One
https://www.readbyqxmd.com/read/28762448/comparison-of-warm-fluid-and-cold-fluid-resuscitation-during-uncontrolled-hemorrhagic-shock-model-in-rats
#19
Serkan Dilmen, Mehmet Eryılmaz, Salih Müjdat Balkan, Muhittin Serdar, Murat Durusu, Ali Osman Yıldırım, Sanem Aslıhan Dilmen
BACKGROUND: This study was designed to compare the effects of resuscitation with cold and warm fluid on survival time, rate and volume of hemorrhage, hemodynamics, hypothermia, coagulopathy, acid-base balance, hematocrit, lactate, and base deficit during uncontrolled hemorrhagic shock (HS) model in rats. METHODS: HS model was created with splenic vascular and parenchymal injury in 29 rats under ketamine and xylazine anesthesia. Thirty minutes after the hemorrhage, the rats were randomized to receive 14...
July 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28739676/shape-analysis-of-the-htra-rna-thermometer-from-salmonella-enterica
#20
Edric K Choi, Kelsey A Ulanowicz, Yen Anh H Nguyen, Jane K Frandsen, Rachel M Mitton-Fry
RNA thermometers regulate expression of some genes involved in virulence of pathogenic bacteria such as Yersinia, Neisseria, and Salmonella They often function through temperature-dependent conformational changes that alter accessibility of the ribosome-binding site. The 5'-untranslated region (UTR) of the htrA mRNA from Salmonella enterica contains a very short RNA thermometer. We have systematically characterized the structure and dynamics of this thermometer at single-nucleotide resolution using SHAPE (selective 2'-hydroxyl acylation analyzed by primer extension) assays...
October 2017: RNA
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