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https://www.readbyqxmd.com/read/29474750/suppressed-heat-shock-protein-response-in-the-kidney-of-exercise-trained-diabetic-rats
#1
J Lappalainen, N K J Oksala, D E Laaksonen, S Khanna, T Kokkola, K Kaarniranta, C K Sen, M Atalay
Impaired expression of heat shock proteins (HSPs) and increased oxidative stress may contribute to the pathophysiology of diabetes by disrupted tissue protection. Acute exercise induces oxidative stress, whereas exercise training up-regulates endogenous antioxidant defenses and HSP expression. Although diabetic nephropathy is a major contributor to diabetic morbidity, information regarding the effect of HSPs on kidney protection is limited. The present study evaluated the effects of 8-week exercise training on kidney HSP expression and markers of oxidative stress at rest and after acute exercise in rats with or without streptozotocin-induced diabetes...
February 23, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29474581/thermopriming-triggers-splicing-memory-in-arabidopsis
#2
Yu Ling, Natalia Serrano, Ge Gao, Mohamed Atia, Morad Mokhtar, Yong H Woo, Jeremie Bazin, Alaguraj Veluchamy, Moussa Benhamed, Martin Crespi, Christoph Gehring, A S N Reddy, Magdy M Mahfouz
Abiotic and biotic stresses limit crop productivity. Exposure to a non-lethal stress, referred to as priming, can allow plants to survive subsequent and otherwise lethal conditions; the priming effect persists even after a prolonged stress-free period. However, the molecular mechanisms underlying priming are not fully understood. Here, we investigated the molecular basis of heat shock memory and the role of priming in Arabidopsisthaliana. Comprehensive analysis of transcriptome-wide changes in gene expression and alternative splicing in primed and non-primed plants revealed that alternative splicing functions as a novel component of heat shock memory...
February 21, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29474563/effects-of-heat-stress-during-porcine-reproductive-and-respiratory-syndrome-virus-infection-on-metabolic-responses-in-growing-pigs
#3
K M Seelenbinder, L D Zhao, M D Hanigan, M W Hulver, R P McMillan, L H Baumgard, J T Selsby, J W Ross, N K Gabler, R P Rhoads
Heat stress and immune challenges negatively impact nutrient allocation and metabolism in swine, especially due to elevated heat load. In order to assess the effects of heat stress during porcine reproductive and respiratory syndrome virus (PRRSV) infection on metabolism, 9-week old crossbred barrows were individually housed, fed ad libitum, divided into four treatments: thermo-neutral (TN), thermo-neutral PRRSV infected (TP), heat stress (HS), and heat stress PRRSV infected (HP), and subjected to two experimental phases...
February 21, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29473008/codominant-grasses-differ-in-gene-expression-under-experimental-climate-extremes-in-native-tallgrass-prairie
#4
Ava M Hoffman, Meghan L Avolio, Alan K Knapp, Melinda D Smith
Extremes in climate, such as heat waves and drought, are expected to become more frequent and intense with forecasted climate change. Plant species will almost certainly differ in their responses to these stressors. We experimentally imposed a heat wave and drought in the tallgrass prairie ecosystem near Manhattan, Kansas, USA to assess transcriptional responses of two ecologically important C4 grass species, Andropogon gerardii and Sorghastrum nutans . Based on previous research, we expected that S. nutans would regulate more genes, particularly those related to stress response, under high heat and drought...
2018: PeerJ
https://www.readbyqxmd.com/read/29472774/5-7-dimethoxycoumarin-prevents-chronic-mild-stress-induced-depression-in-rats-through-increase-in-the-expression-of-heat-shock-protein-70-and-inhibition-of-monoamine-oxidase-a-levels
#5
Wei Yang, Huanlin Wang
The current study was aimed to investigate the role of 5,7-dimethoxycoumarin in the prevention of chronic mild stress induced depression in rats. The chronic mild stress rat model was prepared using the known protocols. The results from open-field test showed that rats in the chronic mild stress group scored very low in terms of crossings and rearings than those of the normal rats. However, pre-treatment of the rats with 10 mg/kg doses of 5,7-dimethoxycoumarin prevented decline in the locomotor activity by chronic mild stress...
February 2018: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/29472715/desumoylation-switches-kaiso-from-activator-to-repressor-upon-hyperosmotic-stress
#6
Svetlana Zhenilo, Igor Deyev, Ekaterina Litvinova, Nadezhda Zhigalova, Daria Kaplun, Alexey Sokolov, Alexander Mazur, Egor Prokhortchouk
Kaiso is a member of the BTB/POZ zinc finger family, which is involved in cancer progression, cell cycle control, apoptosis, and WNT signaling. Depending on promoter context, it may function as either a transcriptional repressor or activator. Previous studies found that Kaiso might be SUMOylated due to heat shock, but the biological significance of Kaiso SUMOylation is unclear. Here, we find that K42 is the only amino acid within Kaiso that is modified with SUMO. Kaiso is monoSUMOylated at lysine 42 in cell lines of kidney origin under normal physiological conditions...
February 22, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29472534/thermal-influences-on-spontaneous-rock-dome-exfoliation
#7
Brian D Collins, Greg M Stock, Martha-Cary Eppes, Scott W Lewis, Skye C Corbett, Joel B Smith
Rock domes, with their onion-skin layers of exfoliation sheets, are among the most captivating landforms on Earth. Long recognized as integral in shaping domes, the exact mechanism(s) by which exfoliation occurs remains enigmatic, mainly due to the lack of direct observations of natural events. In August 2014, during the hottest days of summer, a granitic dome in California, USA, spontaneously exfoliated; witnesses observed extensive cracking, including a ~8000 kg sheet popping into the air. Subsequent exfoliation episodes during the following two summers were recorded by instrumentation that captured-for the first time-exfoliation deformation and stress conditions...
February 22, 2018: Nature Communications
https://www.readbyqxmd.com/read/29472490/rna-thermosensors-how-might-animals-exploit-their-regulatory-potential
#8
REVIEW
George N Somero
The secondary and tertiary orders of RNA structure are crucial for a suite of RNA-related functions, including regulation of translation, gene expression and RNA turnover. The temperature sensitivity of RNA secondary and tertiary structures is exploited by bacteria to fabricate RNA thermosensing systems that allow a rapid adaptive response to temperature change. RNA thermometers (RNATs) present in non-coding regions of certain mRNAs of pathogenic bacteria enable rapid upregulation of translation of virulence proteins when the temperature of the bacterium rises after entering a mammalian host...
February 22, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29471400/increased-dietary-protein-or-free-amino-acids-supply-for-heat-stress-pigs-effect-on-performance-and-carcass-traits
#9
A Morales, M Chávez, N Vásquez, J K Htoo, L Buenabad, S Espinoza, M Cervantes
Heat stress (HS) pigs reduce their voluntary feed intake (VFI) and ingestion of indispensable amino acids (AA). Increasing the dietary CP content may help to correct the reduced AA intake by HS pigs, but it may further increase their body heat load. Increasing the AA intake by adding free AA to the diet does not affect the heat load of HS pigs. Two 21-d experiments were conducted. In Exp. 1, 30 pigs (31.1 ± 1.2 kg initial BW) were used to determine the performance depression because of HS. Treatments were: thermo neutral pigs fed a 22% CP control diet (TN-C); HS pigs fed the control diet (HS-C); HS pigs fed a 14% CP, AA supplemented diet (HS-AA)...
February 17, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29471273/effect-of-simultaneously-induced-environmental-stimuli-on-electrical-signalling-and-gas-exchange-in-maize-plants
#10
Jasmin Vuralhan-Eckert, Silke Lautner, Jörg Fromm
Electrical signalling in response to environmental stimuli is a well-known phenomenon in higher plants. For example, in maize, different stimuli, such as wounding or re-irrigation after drought, incite characteristic electrical signals which have quite particular effects on gas exchange. What is less well understood is how plants (specifically maize) respond when two different environmental stimuli are applied simultaneously. To explore this, a three-stage experiment was designed. In the first stage, drought conditions were simulated by decreasing the soil water content to 30-40 % of field capacity...
February 10, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29471265/role-of-rpos-in-stress-resistance-quorum-sensing-and-spoilage-potential-of-pseudomonas-fluorescens
#11
Xiaoxiang Liu, Lei Ji, Xu Wang, Jianrong Li, Junli Zhu, Aihua Sun
Microorganism activities are considered the main cause of most food spoilage, leading to great economic losses. Pseudomonas fluorescens is a Gram-negative bacterium that is widely found in food and has high spoilage activity. RpoS is considered an important global regulator involved in stress survival and virulence in many pathogens. Thus, it is very possible that RpoS plays an important role in spoilage regulation in P. fluorescens. In this study an in-frame deletion mutation of rpoS was constructed to explore its function in P...
February 14, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29471125/biochar-activation-with-exoenzymes-induced-by-earthworms-a-novel-functional-strategy-for-soil-quality-promotion
#12
Juan C Sanchez-Hernandez
The activation of biochar (carbonaceous material generated by pyrolysis of biomass) with extracellular enzymes generated from soil biological processes was studied via a 2-month microcosm using earthworms. The isolation of biochar particles (post-incubated biochar) from earthworm-treated soils allowed to confirm an enrichment of biochar with extracellular enzymes associated to biogeochemical (alkaline phosphatase, β-glucosidase and arylsulfatase) and bioremediation pathways (carboxylesterase). The hydrolytic activity of this biochar incubated with earthworms was up to 8 times higher compared with that of control biochar (incubated in earthworm-free soils)...
February 12, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29471019/hsp90-co-chaperone-p23-contributes-to-dopaminergic-mitochondrial-stress-via-stabilization-of-phd2-implications-for-parkinson-s-disease
#13
Anand Rane, Subramanian Rajagopalan, Manuj Ahuja, Bobby Thomas, Shankar J Chinta, Julie K Andersen
The heat shock factor 90 (hsp90) complex has long been associated with neuropathological phenotypes linked to Parkinson's disease (PD) and its inhibition is neuroprotective in disease models. Hsp90 is conventionally believed to act by suppressing induction of hsp70. Here, we report a novel hsp70-independent mechanism by which Hsp90 may also contribute to PD-associated neuropathology. We previously reported that inhibition of the enzyme prolyl hydroxylase domain 2 (PHD2) in conjunction with increases in hypoxia-inducible factor 1 alpha (HIF1α) results in protection of vulnerable dopaminergic substantia nigra pars compacta (DAergic SNpc) neurons in in vitro and in vivo models of PD...
February 19, 2018: Neurotoxicology
https://www.readbyqxmd.com/read/29470824/turning-up-the-heat-an-evaluation-of-the-evidence-for-heating-to-promote-exercise-recovery-muscle-rehabilitation-and-adaptation
#14
REVIEW
Hamish McGorm, Llion A Roberts, Jeff S Coombes, Jonathan M Peake
Historically, heat has been used in various clinical and sports rehabilitation settings to treat soft tissue injuries. More recently, interest has emerged in using heat to pre-condition muscle against injury. The aim of this narrative review was to collate information on different types of heat therapy, explain the physiological rationale for heat therapy, and to summarise and evaluate the effects of heat therapy before, during and after muscle injury, immobilisation and strength training. Studies on skeletal muscle cells demonstrate that heat attenuates cellular damage and protein degradation (following in vitro challenges/insults to the cells)...
February 22, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29468999/effect-of-heat-stress-on-the-interaction-of-streptococcus-uberis-with-bovine-mammary-epithelial-cells
#15
Raúl A Almeida, Oudessa Kerro-Dego, Agustín G Rius
No abstract text is available yet for this article.
February 2018: Journal of Dairy Research
https://www.readbyqxmd.com/read/29468755/impact-of-a-mild-scrotal-heating-on-sperm-chromosomal-abnormality-acrosin-activity-and-seminal-alpha-glucosidase-in-human-fertile-males
#16
M-H Zhang, L-P Zhai, Z-Y Fang, A-N Li, Y Qiu, Y-X Liu
The aim of this study was to observe sperm aneuploidy, DNA integrity, seminal alpha-glucosidase (NAG) and acrosin activity (AA) under testicular heat stress (SH). Spermatozoa were obtained from 30 healthy adult volunteers subjected to scrotal warming at 43°C for 30-40 min on two successive days per week for 3 months between February 2012 and September 2016. Aniline blue (AB), acridine orange (AO) staining, TUNEL assay and FISH analysis to evaluate sperm function, sperm DNA integrity and chromosomal abnormalities were carried on before, during and after SH...
February 22, 2018: Andrologia
https://www.readbyqxmd.com/read/29467776/genome-wide-association-analyses-identify-qtl-hotspots-for-yield-and-component-traits-in-durum-wheat-grown-under-yield-potential-drought-and-heat-stress-environments
#17
Sivakumar Sukumaran, Matthew P Reynolds, Carolina Sansaloni
Understanding the genetic bases of economically important traits is fundamentally important in enhancing genetic gains in durum wheat. In this study, a durum panel of 208 lines (comprised of elite materials and exotics from the International Maize and Wheat Improvement Center gene bank) were subjected to genome wide association study (GWAS) using 6,211 DArTseq single nucleotide polymorphisms (SNPs). The panel was phenotyped under yield potential (YP), drought stress (DT), and heat stress (HT) conditions for 2 years...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29467745/small-non-coding-rna-ryhb-mediates-persistence-to-multiple-antibiotics-and-stresses-in-uropathogenic-escherichia-coli-by-reducing-cellular-metabolism
#18
Shanshan Zhang, Shuang Liu, Nan Wu, Youhua Yuan, Wenhong Zhang, Ying Zhang
As dormant phenotypic variants of bacteria, persisters account for many chronic infections affecting human health. Despite numerous studies, the role of small non-coding RNA (sRNA) in bacterial persistence has not been reported. To investigate the role of Hfq-interacting sRNA in persistence, we constructed the deletion mutants of 20 Hfq-interacting sRNAs (RyhB, GcvB, MgrR, RybB, MicF, SgrS, RprA, DicF, SsrS, FnrS, GadY, DsrA, OmrB, ArcZ, RyeB, RydC, OmrA, MicA, MicC, and ChiX) to assess their persistence capacity in uropathogenic Escherichia coli strain UTI89 and identified a new sRNA RyhB being involved in persister formation...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29467719/physical-exercise-enhanced-heat-shock-protein-60-expression-and-attenuated-inflammation-in-the-adipose-tissue-of-human-diabetic-obese
#19
Abdelkrim Khadir, Sina Kavalakatt, Preethi Cherian, Samia Warsame, Jehad Ahmed Abubaker, Mohammed Dehbi, Ali Tiss
Heat shock protein 60 (HSP60) is a key protein in the crosstalk between cellular stress and inflammation. However, the status of HSP60 in diabetes and obesity is unclear. In the present study, we investigated the hypothesis that HSP60 expression levels in the adipose tissue of human obese adults with and without diabetes are different and physical exercise might affect these levels. Subcutaneous adipose tissue (SAT) and blood samples were collected from obese adults with and without diabetes ( n  = 138 and n  = 92, respectively, at baseline; n  = 43 for both groups after 3 months of physical exercise)...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29466423/proteomic-analysis-of-the-human-retina-reveals-region-specific-susceptibilities-to-metabolic-and-oxidative-stress-related-diseases
#20
Gabriel Velez, Daniel A Machlab, Peter H Tang, Yang Sun, Stephen H Tsang, Alexander G Bassuk, Vinit B Mahajan
Differences in regional protein expression within the human retina may explain molecular predisposition of specific regions to ophthalmic diseases like age-related macular degeneration, cystoid macular edema, retinitis pigmentosa, and diabetic retinopathy. To quantify protein levels in the human retina and identify patterns of differentially-expressed proteins, we collected foveomacular, juxta-macular, and peripheral retina punch biopsies from healthy donor eyes and analyzed protein content by liquid chromatography-tandem mass spectrometry (LC-MS/MS)...
2018: PloS One
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