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Temperature regulation

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https://www.readbyqxmd.com/read/29232696/effect-of-temperature-on-fatty-acid-metabolism-in-skeletal-muscle-mitochondria-of-untrained-and-endurance-trained-rats
#1
Jerzy A Zoladz, Agnieszka Koziel, Izabela Broniarek, Andrzej M Woyda-Ploszczyca, Karolina Ogrodna, Joanna Majerczak, Jan Celichowski, Zbigniew Szkutnik, Wieslawa Jarmuszkiewicz
We studied the effects of various assay temperatures, representing hypothermia (25°C), normothermia (35°C), and hyperthermia (42°C), on the oxidation of lipid-derived fuels in rat skeletal muscle mitochondria of untrained and endurance-trained rats. Adult 4-month-old male Wistar rats were assigned to a training group (rats trained on a treadmill for 8 weeks) or a sedentary control group. In skeletal muscle mitochondria of both control and trained rats, an increase in the assay temperature from 25°C to 42°C was accompanied by a consistent increase in the oxidation of palmitoylcarnitine and glycerol-3-phosphate...
2017: PloS One
https://www.readbyqxmd.com/read/29231975/the-precise-subcellular-localization-of-dlg-in-the-drosophila-larva-body-wall-using-improved-pre-embedding-immuno-em
#2
Guangming Gan, Chenchen Zhang
Discs-large (Dlg) plays important roles in nerve tissue and epithelial tissue in Drosophila. However, the precise positioning of Dlg in the neuromuscular junction remains to be confirmed using an optimized labeling method. In this study, we improved the method of pre-embedding immunogold electron microscopy without the osmic tetroxide procedure, and we found that Lowicryl K4 M resin and low temperature helped to preserve the authenticity of the labeling signal with relatively good contrast. Dlg was strongly expressed in the entire subsynaptic reticulum (SSR) membrane of type Ib boutons, expressed in parts of the SSR membrane of type Is boutons, weakly expressed in axon terminals and axons, and not expressed in pre- or postsynaptic membranes of type Is boutons...
December 12, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29231335/-review-on-skin-temperature-of-acupoints
#3
REVIEW
Ziyi Yang, Mengyuan Zhou, Xing Wang, Yunyun Zhao, Zhifeng Chen, Yi Lan, Tao Xu, Yu Zhao, Ling Zhao
We retrieve and analyze the articles on body surface temperature of acupoints in the recent 50 years. Surface temperatures have been compared between acupoints and nonacupoints, and among acupoints in different states. The impacts of interventions for acupoint temperature are explored, including acupuncture,moxibustion and cupping, etc. We summarize the features and the rules of acupoint skin temperature. It is considered that there exists distribution rule for healthy people's acupoint skin temperature. That means acupoints have higher surface temperature than nonacupoints...
January 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29231321/-efficacy-of-acupuncture-moxibustion-periodic-therapy-on-follicular-maldevelopment-differentiated-as-spleen-and-kidney-yang-deficiency
#4
Yuxuan Yan, Chang Pan, Jie Wu, Lijie Yang
OBJECTIVE: To observe the clinical efficacy of acupuncture and moxibustion periodic therapy on folli-cular maldevelopment differentiated as spleen and kidney yang deficiency. METHODS: Sixty patients of follicular maldevelopment differentiated as spleen and kidney yang deficiency were randomized as an observation group and a control group, 30 cases in each one. The conventional acupuncture-moxibustion therapy was used in the control group and the acupuncture-moxibustion periodic therapy was applied to the observation group...
January 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29230823/decreasing-fructose-1-6-bisphosphate-aldolase-activity-reduces-plant-growth-and-tolerance-to-chilling-stress-in-tomato-seedlings
#5
Bingbing Cai, Qiang Li, Fengjiao Liu, Huangai Bi, Xizhen Ai
In northern China, low temperatures are the most common abiotic stresses for tomato plants cultivated in solar-greenhouse in winter. We recently found that the expression and enzyme activity of fructose 1,6-bisphosphate aldolases in tomato (FBAs), which are important enzymes in the Calvin-Benson cycle (CBC), were significantly altered in tomato seedlings subjected to heat/cold stresses. In order to study the role of FBA in photosynthesis and in regulating cold stress responses of tomato seedlings (Solanum lycopersicum), we transformed a tomato inbred line (FF) with RNA interference (RNAi) vector containing SlFBA7 reverse tandem repeat sequence...
December 12, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29230255/control-of-cell-proliferation-by-a-porous-chitosan-scaffold-with-multiple-releasing-capabilities
#6
Shu-Jyun Cai, Ching-Wen Li, Daphne Weihs, Gou-Jen Wang
The aim of this study was to develop a porous chitosan scaffold with long-acting drug release as an artificial dressing to promote skin wound healing. The dressing was fabricated by pre-freezing at different temperatures (-20 and -80 °C) for different periods of time, followed by freeze-drying to form porous chitosan scaffolds with different pore sizes. The chitosan scaffolds were then used to investigate the effect of the controlled release of fibroblast growth factor-basic (bFGF) and transforming growth factor-β1 (TGFβ1) on mouse fibroblast cells (L929) and bovine carotid endothelial cells (BEC)...
2017: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/29230026/homogenization-of-lake-cyanobacterial-communities-over-a-century-of-climate-change-and-eutrophication
#7
Marie-Eve Monchamp, Piet Spaak, Isabelle Domaizon, Nathalie Dubois, Damien Bouffard, Francesco Pomati
Human impacts on biodiversity are well recognized, but uncertainties remain regarding patterns of diversity change at different spatial and temporal scales. Changes in microbial assemblages are, in particular, not well understood, partly due to the lack of community composition data over relevant scales of space and time. Here, we investigate biodiversity patterns in cyanobacterial assemblages over one century of eutrophication and climate change by sequencing DNA preserved in the sediments of ten European peri-Alpine lakes...
December 11, 2017: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/29229863/noncanonical-thyroid-hormone-signaling-mediates-cardiometabolic-effects-in-vivo
#8
G Sebastian Hönes, Helena Rakov, John Logan, Xiao-Hui Liao, Eugenie Werbenko, Andrea S Pollard, Stine M Præstholm, Majken S Siersbæk, Eddy Rijntjes, Janina Gassen, Sören Latteyer, Kathrin Engels, Karl-Heinz Strucksberg, Petra Kleinbongard, Denise Zwanziger, Jan Rozman, Valerie Gailus-Durner, Helmut Fuchs, Martin Hrabe de Angelis, Ludger Klein-Hitpass, Josef Köhrle, David L Armstrong, Lars Grøntved, J H Duncan Bassett, Graham R Williams, Samuel Refetoff, Dagmar Führer, Lars C Moeller
Thyroid hormone (TH) and TH receptors (TRs) α and β act by binding to TH response elements (TREs) in regulatory regions of target genes. This nuclear signaling is established as the canonical or type 1 pathway for TH action. Nevertheless, TRs also rapidly activate intracellular second-messenger signaling pathways independently of gene expression (noncanonical or type 3 TR signaling). To test the physiological relevance of noncanonical TR signaling, we generated knockin mice with a mutation in the TR DNA-binding domain that abrogates binding to DNA and leads to complete loss of canonical TH action...
December 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29229444/neural-control-of-choroidal-blood-flow
#9
REVIEW
Anton Reiner, Malinda E C Fitzgerald, Nobel Del Mar, Chunyan Li
The choroid is richly innervated by parasympathetic, sympathetic and trigeminal sensory nerve fibers that regulate choroidal blood flow in birds and mammals, and presumably other vertebrate classes as well. The parasympathetic innervation has been shown to vasodilate and increase choroidal blood flow, the sympathetic input has been shown to vasoconstrict and decrease choroidal blood flow, and the sensory input has been shown to both convey pain and thermal information centrally and act locally to vasodilate and increase choroidal blood flow...
December 8, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/29229392/a-novel-cold-regulated-gene-from-phlox-subulata-pscor413im1-enhances-low-temperature-tolerance-in-arabidopsis
#10
Aimin Zhou, Hongwei Sun, Shuang Feng, Mi Zhou, Shufang Gong, Jingang Wang, Shuzhen Zhang
Low temperature stress adversely affects plant growth, development, and crop productivity. Analysis of the function of genes in the response of plants to low temperature stress is essential for understanding the mechanism of chilling and freezing tolerance. In this study, PsCor413im1, a novel cold-regulated gene isolated from Phlox subulata, was transferred to Arabidopsis to investigate its function under low temperature stress. Real-time quantitative PCR analysis revealed that PsCor413im1 expression was induced by cold and abscisic acid...
December 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29228297/density-dependence-landscape-and-weather-impacts-on-aquatic-aedes-japonicus-japonicus-diptera-culicidae-abundance-along-an-urban-altitudinal-gradient
#11
Luis Fernando Chaves, Kazuhiko Moji
The Asian Bush Mosquito, Aedes (Finlaya) japonicus japonicus (Theobald) is an important globally invasive mosquito species. In comparison with other major invasive mosquitoes, relatively little is known about Ae. j. japonicus population dynamics in the field. Here, we present results from a 54-biweek long study of Ae. j. japonicus abundance in ovitraps set across the altitudinal gradient of Mt. Konpira, Nagasaki, Japan. Spatially, we found that Ae. j. japonicus fourth instar larvae (Aj4il) were more abundant at the base and top of Mt...
December 8, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29228032/genome-wide-identification-of-wrky-genes-and-their-expression-profiles-under-different-abiotic-stresses-in-elaeis-guineensis
#12
Yong Xiao, Lixia Zhou, Xintao Lei, Hongxing Cao, Yong Wang, Yajing Dou, Wenqi Tang, Wei Xia
African oil palm (Elaeis guineensis) is an important oil crop grown in tropical region and sensitive to low temperature along with high tolerance to salt and drought stresses. Since the WRKY transcription factor family plays central roles in the regulation of plant stress tolerance, 95 genes belonging to the WRKY family were identified and characterized in oil palm genome. Gene structure analysis showed that EgWRKY genes have considerable variation in intron number (0 to 12) and gene length (477bp to 89,167 bp)...
2017: PloS One
https://www.readbyqxmd.com/read/29226972/physiological-acclimation-dampens-initial-effects-of-elevated-temperature-and-atmospheric-co2-concentration-in-mature-boreal-norway-spruce
#13
Shubhangi Lamba, Marianne Hall, Mats Räntfors, Nitin Chaudhary, Sune Linder, Danielle Way, Johan Uddling, Göran Wallin
Physiological processes of terrestrial plants regulate the land-atmosphere exchange of carbon, water, and energy, yet few studies have explored the acclimation responses of mature boreal conifer trees to climate change. Here we explored the acclimation responses of photosynthesis, respiration, and stomatal conductance to elevated temperature and/or CO2 concentration ([CO2 ]) in a 3-year field experiment with mature boreal Norway spruce. We found that elevated [CO2 ] decreased photosynthetic carboxylation capacity (-23% at 25 °C) and increased shoot respiration (+64% at 15 °C), while warming had no significant effects...
December 11, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29225313/ingestion-of-coffee-polyphenols-improves-a-scaly-skin-surface-and-the-recovery-rate-of-skin-temperature-after-cold-stress-a-randomized-controlled-trial
#14
Sachie Ueda, Masanori Tanahashi, Yuko Higaki, Kayoko Iwata, Yoshinori Sugiyama
Coffee polyphenols (CPPs) derived from coffee beans have beneficial effects on blood pressure and vascular endothelial function. In addition, CPPs suppress ultraviolet light induced erythema. However, the effects of CPPs on dry skin and cutaneous vascular function have not been clarified. We investigated the effects of CPPs on dry skin and the recovery rate (RR) of skin temperature after a cold-stress test as a measure of vascular function in subjects with visible scaliness in a double-blind, placebo-controlled, randomized study...
2017: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/29224101/estradiol-regulation-of-brown-adipose-tissue-thermogenesis
#15
Ismael González-García, Manuel Tena-Sempere, Miguel López
Physiologically, estrogens carry out a myriad of functions, the most essential being the regulation of the reproductive axis. Currently, it is also dogmatic that estrogens play an important role modulating energy balance and metabolism. In this sense, it is well known that low estrogens levels, occurring due to ovarian insufficiency, in conditions such as menopause or ovariectomy (OVX), are associated with increased food intake and decreased energy expenditure, leading to weight gain and obesity at long term...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29222493/bioinspired-graphene-membrane-with-temperature-tunable-channels-for-water-gating-and-molecular-separation
#16
Jingchong Liu, Nü Wang, Li-Juan Yu, Amir Karton, Wen Li, Weixia Zhang, Fengyun Guo, Lanlan Hou, Qunfeng Cheng, Lei Jiang, David A Weitz, Yong Zhao
Smart regulation of substance permeability through porous membranes is highly desirable for membrane applications. Inspired by the stomatal closure feature of plant leaves at relatively high temperature, here we report a nano-gating membrane with a negative temperature-response coefficient that is capable of tunable water gating and precise small molecule separation. The membrane is composed of poly(N-isopropylacrylamide) covalently bound to graphene oxide via free-radical polymerization. By virtue of the temperature tunable lamellar spaces of the graphene oxide nanosheets, the water permeance of the membrane could be reversibly regulated with a high gating ratio...
December 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/29219426/interatomic-spin-coupling-in-manganese-clusters-registered-on-graphene
#17
Jindong Ren, Haiming Guo, Jinbo Pan, Yan-Fang Zhang, Yifeng Yang, Xu Wu, Shixuan Du, Min Ouyang, Hong-Jun Gao
Different interatomic spin interactions in graphene-regulated Mn atomic clusters are investigated by low-temperature scanning tunneling microscopy and magnetic-field-dependent inelastic spin excitation spectroscopy. All dimers observed exhibit an antiferromagnetic (AFM) singlet ground state and spin transition from the singlet to triplet states, but their AFM coupling strength shows a unique dependence on their site registration on the graphene. Intriguing spin coupling can be found in the graphene-mediated Mn trimers, which manifest multilevel spin excitations...
October 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29218454/the-extraordinary-afd-thermosensor-of-c-elegans
#18
REVIEW
Miriam B Goodman, Piali Sengupta
The nematode C. elegans exhibits complex thermal experience-dependent navigation behaviors in response to environmental temperature changes of as little as 0.01°C over a > 10°C temperature range. The remarkable thermosensory abilities of this animal are mediated primarily via the single pair of AFD sensory neurons in its head. In this review, we describe the contributions of AFD to thermosensory behaviors and temperature-dependent regulation of organismal physiology. We also discuss the mechanisms that enable this neuron type to adapt to recent temperature experience and to exhibit extraordinary thermosensitivity over a wide dynamic range...
December 8, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29218225/the-gill-parasite-paramoeba-perurans-compromises-aerobic-scope-swimming-capacity-and-ion-balance-in-atlantic-salmon
#19
Malthe Hvas, Egil Karlsbakk, Stig Mæhle, Daniel William Wright, Frode Oppedal
The parasitic amoeba Paramoeba perurans is an aetiological agent of amoebic gill disease (AGD), a serious problem in seawater salmonid aquaculture globally. Other finfish species are also infected and infection events may be associated with periods of unusual high temperatures. Currently little is known about the impact of AGD on wild fish, but in a time with global warming and increasing aquaculture production this potential threat could be on the rise. A better understanding of the pathophysiology of infected fish is therefore warranted...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/29218138/conspecific-plants-are-better-nurses-than-rocks-consistent-results-revealing-intraspecific-facilitation-as-a-process-that-promotes-establishment-in-a-hyper-arid-environment
#20
Andrea P Loayza, Marisol A Herrera-Madariaga, Danny E Carvajal, Patricio García-Guzmán, Francisco A Squeo
Harsh environmental conditions in arid ecosystems limit seedling recruitment to microhabitats under nurse structures, such as shrubs or rocks. These structures, however, do not necessarily afford the same benefits to plants because nurse rocks provide only physical nurse effects, whereas nurse plants can provide both physical and biological nurse effects. Nevertheless, if the nurse plant is a conspecific, the benefits it provides may be outweighed by higher mortality due to negative density-dependent processes; consequently, negative density-dependence is expected to limit plants from acting as nurses to their own seedlings...
November 2017: AoB Plants
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