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https://www.readbyqxmd.com/read/28813617/environmental-stress-affects-the-formation-of-staphylococcus-aureus-persisters-tolerant-to-antibiotics
#1
Lucie Kubistova, Lukas Dvoracek, Jan Tkadlec, Oto Melter, Irena Licha
The ability to form persisters has been observed in many microorganisms, including Staphylococcus aureus, mainly in the context of chronic infections and the pathogenicity of these microbes. In our research, we have demonstrated that salt or oxidative stress could play a role in the formation of S. aureus persisters outside the host's intracellular interface. We pre-exposed planktonic growing bacterial culture to an oxidative or salt stress and monitored the dynamics of persister formation after ciprofloxacin and gentamicin treatment...
August 16, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28813250/parenting-and-sleep-in-early-childhood
#2
REVIEW
Liat Tikotzky
The development of sleep is influenced by complex interactions between biologically driven forces and diverse socio-environmental factors. Among those factors, parents have a critical role. The present review focuses on new studies regarding the links between parenting and the development of sleep in early childhood in the context of a transactional model. Recent findings from longitudinal studies and large cohort studies highlight the contribution of various parenting factors, such as parental bedtime behaviors, parental cognitions, cry tolerance, maternal mood, stress, and the parents' couple relationship, to the development of child sleep...
June 2017: Current Opinion in Psychology
https://www.readbyqxmd.com/read/28812766/modulatory-effects-of-arginine-glutamine-and-branched-chain-amino-acids-on-heat-shock-proteins-immunity-and-antioxidant-response-in-exercised-rats
#3
Carolina Soares Moura, Pablo Christiano Barboza Lollo, Priscila Neder Morato, Eder Muller Risso, Jaime Amaya-Farfan
Heat shock proteins (HSPs) are endogenous proteins whose function is to maintain the cell's tolerance to insult, and glutamine supplementation is known to increase HSP expression during intense exercise. Since few studies have addressed the possibility that supplementation with other amino acids could have similar effects to that of glutamine, our objective was to evaluate the effects of leucine, valine, isoleucine and arginine as potential stimulators of HSPs 25, 60, 70 and 90 in rats subjected to acute exercise as a stressing factor...
August 16, 2017: Food & Function
https://www.readbyqxmd.com/read/28812677/species-specific-responses-to-ocean-acidification-should-account-for-local-adaptation-and-adaptive-plasticity
#4
Cristian A Vargas, Nelson A Lagos, Marco A Lardies, Cristian Duarte, Patricio H Manríquez, Victor M Aguilera, Bernardo Broitman, Steve Widdicombe, Sam Dupont
Global stressors, such as ocean acidification, constitute a rapidly emerging and significant problem for marine organisms, ecosystem functioning and services. The coastal ecosystems of the Humboldt Current System (HCS) off Chile harbour a broad physical-chemical latitudinal and temporal gradient with considerable patchiness in local oceanographic conditions. This heterogeneity may, in turn, modulate the specific tolerances of organisms to climate stress in species with populations distributed along this environmental gradient...
March 13, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812232/introgression-of-heat-shock-protein-hsp70-and-shsp-genes-into-the-malaysian-elite-chilli-variety-kulai-capsicum-annuum-l-through-the-application-of-marker-assisted-backcrossing-mab
#5
Magaji G Usman, Mohd Y Rafii, Mohammad Y Martini, Oladosu A Yusuff, Mohd R Ismail, Gous Miah
Backcrossing together with simple sequence repeat marker strategy was adopted to improve popular Malaysian chilli Kulai (Capsicum annuum L.) for heat tolerance. The use of molecular markers in backcross breeding and selection contributes significantly to overcoming the main drawbacks such as increase linkage drag and time consumption, in the ancient manual breeding approach (conventional), and speeds up the genome recovery of the recurrent parent. The strategy was adopted to introgress heat shock protein gene(s) from AVPP0702 (C...
August 15, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28812204/multivariable-adaptive-artificial-pancreas-system-in-type-1-diabetes
#6
REVIEW
Ali Cinar
PURPOSE OF REVIEW: The review summarizes the current state of the artificial pancreas (AP) systems and introduces various new modules that should be included in future AP systems. RECENT FINDINGS: A fully automated AP must be able to detect and mitigate the effects of meals, exercise, stress and sleep on blood glucose concentrations. This can only be achieved by using a multivariable approach that leverages information from wearable devices that provide real-time streaming data about various physiological variables that indicate imminent changes in blood glucose concentrations caused by meals, exercise, stress and sleep...
August 15, 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28811521/decadal-trends-in-red-sea-maximum-surface-temperature
#7
V Chaidez, D Dreano, S Agusti, C M Duarte, I Hoteit
Ocean warming is a major consequence of climate change, with the surface of the ocean having warmed by 0.11 °C decade(-1) over the last 50 years and is estimated to continue to warm by an additional 0.6 - 2.0 °C before the end of the century(1). However, there is considerable variability in the rates experienced by different ocean regions, so understanding regional trends is important to inform on possible stresses for marine organisms, particularly in warm seas where organisms may be already operating in the high end of their thermal tolerance...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811517/heritability-of-the-symbiodinium-community-in-vertically-and-horizontally-transmitting-broadcast-spawning-corals
#8
Kate M Quigley, Bette L Willis, Line K Bay
The dinoflagellate-coral partnership influences the coral holobiont's tolerance to thermal stress and bleaching. However, the comparative roles of host genetic versus environmental factors in determining the composition of this symbiosis are largely unknown. Here we quantify the heritability of the initial Symbiodinium communities for two broadcast-spawning corals with different symbiont transmission modes: Acropora tenuis has environmental acquisition, whereas Montipora digitata has maternal transmission. Using high throughput sequencing of the ITS-2 region to characterize communities in parents, juveniles and eggs, we describe previously undocumented Symbiodinium diversity and dynamics in both corals...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811489/high-temperature-stress-during-flowering-and-grain-filling-offsets-beneficial-impact-of-elevated-co2-on-assimilate-partitioning-and-sink-strength-in-rice
#9
Ashish K Chaturvedi, Rajeev N Bahuguna, Divya Shah, Madan Pal, S V Krishna Jagadish
Elevated [CO2] (e[CO2]) environments have been predicted to improve rice yields under future climate. However, a concomitant rise in temperature could negate e[CO2] impact on plants, presenting a serious challenge for crop improvement. High temperature (HT) stress tolerant NL-44 and high yielding basmati Pusa 1121 rice cultivars, were exposed to e[CO2] (from panicle initiation to maturity) and a combination of e[CO2] + HT (from heading to maturity) using field based open top chambers. Elevated [CO2] significantly increased photosynthesis, seed-set, panicle weight and grain weight across both cultivars, more prominently with Pusa 1121...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808688/adaptive-mistranslation-accelerates-the-evolution-of-fluconazole-resistance-and-induces-major-genomic-and-gene-expression-alterations-in-candida-albicans
#10
Tobias Weil, Rodrigo Santamaría, Wanseon Lee, Johan Rung, Noemi Tocci, Darren Abbey, Ana R Bezerra, Laura Carreto, Gabriela R Moura, Mónica Bayés, Ivo G Gut, Attila Csikasz-Nagy, Duccio Cavalieri, Judith Berman, Manuel A S Santos
Regulated erroneous protein translation (adaptive mistranslation) increases proteome diversity and produces advantageous phenotypic variability in the human pathogen Candida albicans. It also increases fitness in the presence of fluconazole, but the underlying molecular mechanism is not understood. To address this question, we evolved hypermistranslating and wild-type strains in the absence and presence of fluconazole and compared their fluconazole tolerance and resistance trajectories during evolution. The data show that mistranslation increases tolerance and accelerates the acquisition of resistance to fluconazole...
July 2017: MSphere
https://www.readbyqxmd.com/read/28808104/interaction-between-photosynthetic-electron-transport-and-chloroplast-sinks-triggers-protection-and-signalling-important-for-plant-productivity
#11
Peter J Gollan, Yugo Lima-Melo, Arjun Tiwari, Mikko Tikkanen, Eva-Mari Aro
The photosynthetic light reactions provide energy that is consumed and stored in electron sinks, the products of photosynthesis. A balance between light reactions and electron consumption in the chloroplast is vital for plants, and is protected by several photosynthetic regulation mechanisms. Photosystem I (PSI) is particularly susceptible to photoinhibition when these factors become unbalanced, which can occur in low temperatures or in high light. In this study we used the pgr5 Arabidopsis mutant that lacks ΔpH-dependent regulation of photosynthetic electron transport as a model to study the consequences of PSI photoinhibition under high light...
September 26, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28808013/disaggregating-sorghum-yield-reductions-under-warming-scenarios-exposes-narrow-genetic-diversity-in-us-breeding-programs
#12
Jesse Tack, Jane Lingenfelser, S V Krishna Jagadish
Historical adaptation of sorghum production to arid and semiarid conditions has provided promise regarding its sustained productivity under future warming scenarios. Using Kansas field-trial sorghum data collected from 1985 to 2014 and spanning 408 hybrid cultivars, we show that sorghum productivity under increasing warming scenarios breaks down. Through extensive regression modeling, we identify a temperature threshold of 33 °C, beyond which yields start to decline. We show that this decline is robust across both field-trial and on-farm data...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807879/apigenin-induced-abcc1-mediated-efflux-of-glutathione-from-mature-erythrocytes-inhibits-the-proliferation-of-plasmodium-falciparum
#13
Ohud Fallatah, Elias Georges
Plasmodium falciparum infection of mature normal erythrocytes leads to heightened oxidative stress that is tolerated in normal but not in erythrocytes from sickle-cell, β-thalassemia, and glucose-6-phosphate dehydrogenase (G6PD) deficiency hosts. In this report, it was of interest to perturb the redox homeostasis of normal erythrocytes through drug-induced active efflux of glutathione via erythrocyte ABCC1 (member of the C- subfamily of the human ATP-binding cassette (ABC) transporters). To achieve this objective, we made use of apigenin, shown previously to activate ABCC1 glutathione efflux in mature erythrocytes...
August 11, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28807848/hydroalcoholic-extract-from-bark-of-persea-major-meisn-l-e-kopp-lauraceae-exerts-antiulcer-effects-in-rodents-by-the-strengthening-of-the-gastric-protective-factors
#14
Lincon Bordignon Somensi, Thaise Boeing, Benhur Judah Cury, Viviane Miranda Bispo Steimbach, Rivaldo Niero, Lauro Mera de Souza, Luisa Mota da Silva, Sérgio Faloni de Andrade
ETHOPHARMACOLOGICAL RELEVANCE: The Persea major (Meisn.) L.E. Kopp (Lauraceae) (botanical synonym: Persea pyrifolia (D. Don) Spreng, Persea pyrifolia Nees and Mart., Persea cordata var. major (Meisn.) Mez and Persea willdenovii Kosterm) is a medicinal plant native in the south of Brazil, where is popularly known as Pau de Andrade, Maçaranduba or Abacate-do-Mato. Its barks are commonly used to prepare an infusion which is administered orally or topically to treat ulcers and wounds, respectively...
August 11, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28807619/neuroplasticity-related-mechanisms-underlying-the-antidepressant-like-effects-of%C3%A2-traditional-herbal-medicines
#15
REVIEW
Yafit Hirshler, Ravid Doron
Traditional herbal medicine can offer efficacious and safe alternative pharmacotherapies for depression. The ability of an herbal medicine to produce neuroadaptive processes, that enhance neuroplasticity and cellular resilience in response to chronic stress, may point to its antidepressant potential. We suggest that among many investigated herbal medicines, those that can enhance neuroplasticity may have stronger therapeutic potential. The current article presents a summary of traditional herbal medicines, which are thought to exert antidepressant-like effects in chronic stress models via neuroplasticity enhancement...
August 11, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28806972/overexpression-of-arabidopsis-p3b-increases-heat-and-low-temperature-stress-tolerance-in-transgenic-sweetpotato
#16
Chang Yoon Ji, Rong Jin, Zhen Xu, Ho Soo Kim, Chan-Ju Lee, Le Kang, So-Eun Kim, Hyeong-Un Lee, Joon Seol Lee, Chang Ho Kang, Yong Hun Chi, Sang Yeol Lee, Yiping Xie, Hongmin Li, Daifu Ma, Sang-Soo Kwak
BACKGROUND: Sweetpotato (Ipomoea batatas [L.] Lam) is suitable for growth on marginal lands due to its abiotic stress tolerance. However, severe environmental conditions including low temperature pose a serious threat to the productivity and expanded cultivation of this crop. In this study, we aimed to develop sweetpotato plants with enhanced tolerance to temperature stress. RESULTS: P3 proteins are plant-specific ribosomal P-proteins that act as both protein and RNA chaperones to increase heat and cold stress tolerance in Arabidopsis...
August 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28806968/cardamom-powder-supplementation-prevents-obesity-improves-glucose-intolerance-inflammation-and-oxidative-stress-in-liver-of-high-carbohydrate-high-fat-diet-induced-obese-rats
#17
Md Mizanur Rahman, Mohammad Nazmul Alam, Anayt Ulla, Farzana Akther Sumi, Nusrat Subhan, Trisha Khan, Bishwajit Sikder, Hemayet Hossain, Hasan Mahmud Reza, Md Ashraful Alam
BACKGROUND: Cardamom is a well-known spice in Indian subcontinent, used in culinary and traditional medicine practices since ancient times. The current investigation was untaken to evaluate the potential benefit of cardamom powder supplementation in high carbohydrate high fat (HCHF) diet induced obese rats. METHOD: Male Wistar rats (28 rats) were divided into four different groups such as Control, Control + cardamom, HCHF, HCHF + cardamom. High carbohydrate and high fat (HCHF) diet was prepared in our laboratory...
August 14, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28806927/mapping-of-a-major-qtl-for-salt-tolerance-of-mature-field-grown-maize-plants-based-on-snp-markers
#18
Meijie Luo, Yanxin Zhao, Ruyang Zhang, Jinfeng Xing, Minxiao Duan, Jingna Li, Naishun Wang, Wenguang Wang, Shasha Zhang, Zhihui Chen, Huasheng Zhang, Zi Shi, Wei Song, Jiuran Zhao
BACKGROUND: Salt stress significantly restricts plant growth and production. Maize is an important food and economic crop but is also a salt sensitive crop. Identification of the genetic architecture controlling salt tolerance facilitates breeders to select salt tolerant lines. However, the critical quantitative trait loci (QTLs) responsible for the salt tolerance of field-grown maize plants are still unknown. RESULTS: To map the main genetic factors contributing to salt tolerance in mature maize, a double haploid population (240 individuals) and 1317 single nucleotide polymorphism (SNP) markers were employed to produce a genetic linkage map covering 1462...
August 15, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28806748/temperature-effects-on-gene-expression-and-morphological-development-of-european-eel-anguilla-anguilla-larvae
#19
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/28805934/fragility-of-epidermis-acne-and-post-procedure-lesional-skin
#20
G Fabbrocini, A B Rossi, M-D Thouvenin, C Peraud, V Mengeaud, A Bacquey, M Saint Aroman
'Fragile skin', or skin with lower resistance to aggressors, can be broadly classified into four causal categories: constitutional (age-dependent or associated with specific vulnerable locations on the body, e.g. eyelids), pathological (related to disease), circumstantial (related to environmental or internal factors, e.g. stress) and iatrogenic (caused by medical interventions or treatments). In this supplement, we focus on the fourth category, the iatrogenic origin of fragile skin and the role that dermo-cosmetics can have in restoring the natural protective function of the skin following treatments for skin diseases and medical interventions...
September 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
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