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Stress recovery balance

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https://www.readbyqxmd.com/read/28320258/sex-differences-in-oxidative-stress-after-eccentric-and-concentric-exercise
#1
Magdalena Wiecek, Marcin Maciejczyk, Jadwiga Szymura, Zbigniew Szygula
OBJECTIVES: Comparison of redox balance changes in the blood of women and men as a result of submaximal eccentric (ECC) and concentric (CONC) efforts. METHODS: 10 women and 10 men performed three 45-minute submaximal treadmill runs at constant velocities (downhill run - ECC, uphill run - CONC and level run). Prior to the 45-minute exercises, after their completion and following 24 hours of recovery, the concentration of lactate, oxidized low-density lipoprotein (ox-LDL), 3-nitrotyrosine, uric acid (UA) and the white blood cell count (WBC), neutrophil (NEUT), lymphocyte (LYMPH) and monocyte content in the blood were determined...
March 20, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28303198/impacts-of-leaf-age-and-heat-stress-duration-on-photosynthetic-gas-exchange-and-foliar-nonstructural-carbohydrates-in-coffea-arabica
#2
Danielle E Marias, Frederick C Meinzer, Christopher Still
Given future climate predictions of increased temperature, and frequency and intensity of heat waves in the tropics, suitable habitat to grow ecologically, economically, and socially valuable Coffea arabica is severely threatened. We investigated how leaf age and heat stress duration impact recovery from heat stress in C. arabica. Treated plants were heated in a growth chamber at 49°C for 45 or 90 min. Physiological recovery was monitored in situ using gas exchange, chlorophyll fluorescence (the ratio of variable to maximum fluorescence, FV/FM), and leaf nonstructural carbohydrate (NSC) on mature and expanding leaves before and 2, 15, 25, and 50 days after treatment...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28270829/cadmium-disrupts-the-balance-between-hydrogen-peroxide-and-superoxide-radical-by-regulating-endogenous-hydrogen-sulfide-in-the-root-tip-of-brassica-rapa
#3
Wenjing Lv, Lifei Yang, Cunfa Xu, Zhiqi Shi, Jinsong Shao, Ming Xian, Jian Chen
Cd (cadmium) stress always alters the homeostasis of ROS (reactive oxygen species) including H2O2 (hydrogen sulfide) and [Formula: see text] (superoxide radical), leading to the oxidative injury and growth inhibition in plants. In addition to triggering oxidative injury, ROS has been suggested as important regulators modulating root elongation. However, whether and how Cd stress induces the inhibition of root elongation by differentially regulating endogenous H2O2 and [Formula: see text], rather than by inducing oxidative injury, remains elusive...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28260801/regulation-of-microglial-activation-in-stroke
#4
REVIEW
Shou-Cai Zhao, Ling-Song Ma, Zhao-Hu Chu, Heng Xu, Wen-Qian Wu, Fudong Liu
When ischemic stroke occurs, oxygen and energy depletion triggers a cascade of events, including inflammatory responses, glutamate excitotoxicity, oxidative stress, and apoptosis that result in a profound brain injury. The inflammatory response contributes to secondary neuronal damage, which exerts a substantial impact on both acute ischemic injury and the chronic recovery of the brain function. Microglia are the resident immune cells in the brain that constantly monitor brain microenvironment under normal conditions...
March 6, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28220140/nbs-lrr-protein-pik-h4-interacts-with-osbihd1-to-balance-rice-blast-resistance-and-growth-by-coordinating-ethylene-brassinosteroid-pathway
#5
Hao Liu, Shuangyu Dong, Fengwei Gu, Wei Liu, Guili Yang, Ming Huang, Wuming Xiao, Yongzhu Liu, Tao Guo, Hui Wang, Zhiqiang Chen, Jiafeng Wang
The regulation of innate immunity and plant growth, along with the trade-off between them, affects the defense and recovery mechanisms of the plant after it is attacked by pathogens. Although it is known that hormonal crosstalk plays a major role in regulating interaction of plant growth and PAMP-triggered immunity, the relationship between plant growth and effector-triggered immunity (ETI) remains unclear. In a large-scale yeast two-hybrid screening for Pik-H4-interacting proteins, a homeodomain transcription factor OsBIHD1 was identified, which is previously known to function in biotic and abiotic stress responses...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28210899/interleukin-6-as-possible-early-marker-of-stress-response-after-femoral-fracture
#6
Goran Pesic, Jovana Jeremic, Tamara Nikolic, Vladimir Zivkovic, Ivan Srejovic, Aleksandra Vranic, Jovana Bradic, Branko Ristic, Aleksandar Matic, Nikola Prodanovic, Vladimir Jakovljevic
Bone fracture healing is a complex process which at best results in full recovery of function and structure of injured bone tissue, but all the mechanisms involved in this process, and their mutual interaction, are not fully understood. Despite advancement of surgical procedures, this type of fractures is still a major public health concern. In the last few decades, a lot of attention is focused on the oxygen-free radicals and inflammatory response markers as important factors of skeletal injury. Thus, the aim of the present study was to follow the changes in redox balance and inflammatory response in elderly patients with femoral fractures during the earliest stages of fracture healing, by measuring the values of the observed markers immediately after fracture, as well as the first, third, and seventh postoperative day...
February 16, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28192670/metal-ion-mediated-cellulose-nanofibrils-transient-network-in-covalently-cross-linked-hydrogels-mechanistic-insight-into-morphology-and-dynamics
#7
Jun Yang, Feng Xu, Chun-Rui Han
Utilization of reversible interactions as sacrificial bonds in biopolymers is critical for the integral synthesis of mechanically superior biological materials. In this work, cellulose nanofibrils (CNFs) reinforced covalent polyacrylamide (PAAm) composite hydrogels are immersed into multivalent cation (Ca(2+), Zn(2+), Al(3+), and Ce(3+)) aqueous solution to form ionic association among CNFs, leading to the ionic-covalent cross-linked hydrogels. The cations promote the formation of porous networks of nanofibrils by screening the repulsive negative charges on CNF surface and dominate the mechanical properties and self-recovery efficiency of the hydrogels, resulting in mechanically reinforced ionic hydrogels with stiff (Young's modulus 257 kPa) and tough properties (fracture toughness 386 kJ/m(3))...
March 13, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28188725/physiological-correlates-of-chill-susceptibility-in-lepidoptera
#8
Mads Kuhlmann Andersen, Signe Overgaard Jensen, Johannes Overgaard
The majority of insects enter a state of reversible coma if temperature is lowered sufficiently. If the cold treatment is not too severe these insects recover gradually when returned to benign temperatures in a time-dependent manner that often depends on the duration and intensity of the cold exposure. Previous studies have associated these phenotypes to changes in membrane potential (Vm) and ion balance, and especially hemolymph [K(+)] is known to be of importance for the recovery time. In the present study we examined this link in three species of Lepidoptera as insects from this order are known to possess resting hemolymph [K(+)] that would severely compromise Vm in other insects...
February 8, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28161646/adjustments-in-cam-and-enzymatic-scavenging-of-h2o2-in-juvenile-plants-of-the-epiphytic-bromeliad-guzmania-monostachia-as-affected-by-drought-and-rewatering
#9
Victória Carvalho, Maria E Abreu, Helenice Mercier, Catarina C Nievola
Juvenile plants of epiphytes such as bromeliads are highly prone to dehydration under drought conditions. It is likely that young epiphytes evolved mostly metabolic strategies to resist drought, which may include the plastic modulation of the enzymatic antioxidant system and crassulacean acid metabolism (CAM). Few studies have investigated such strategies in juvenile epiphytes, although such research is important to understand how these plants might face drought intensification derived from potential climatic alterations...
January 28, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28152238/assessment-of-segmental-myocardial-blood-flow-and-myocardial-perfusion-reserve-by-adenosine-stress-myocardial-arterial-spin-labeling-perfusion-imaging
#10
Andrew J Yoon, Hung Phi Do, Steven Cen, Michael W Fong, Farhood Saremi, Mark L Barr, Krishna S Nayak
PURPOSE: To determine the feasibility of measuring increases in myocardial blood flow (MBF) and myocardial perfusion reserve (MPR) on a per-segment basis using arterial spin labeled (ASL) magnetic resonance imaging (MRI) with adenosine vasodilator stress in normal human myocardium. MATERIALS AND METHODS: Myocardial ASL scans at rest and during adenosine infusion were incorporated into a routine 3T MR adenosine-induced vasodilator stress protocol and were performed in 10 healthy human volunteers...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28138387/peripheral-vein-infusions-of-amino-acids-facilitate-recovery-after-esophagectomy-for-esophageal-cancer-retrospective-cohort-analysis
#11
Masafumi Konosu, Takeshi Iwaya, Yusuke Kimura, Yuji Akiyama, Yoshihiro Shioi, Fumitaka Endo, Hiroyuki Nitta, Koki Otsuka, Keisuke Koeda, Akira Sasaki
BACKGROUND: To investigate the efficacy of amino acid administration via peripheral veins in addition to conventional enteral feeding following esophagectomy. MATERIALS AND METHODS: Retrospective analysis of data pertaining to 33 patients with esophageal cancer who underwent radical esophagectomy and satisfied the required nutrition control. Patients were divided into the amino acid group (n = 17) and control group (n = 16). Primary outcomes were albumin (Alb) and prealbumin (PreAlb) levels, urinary 3-methylhistidine/creatinine (3-MeHis/Cre) ratios, nitrogen balance, and weight; postoperative complications were noted as secondary outcomes...
February 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28109823/divergent-regulation-of-insulin-like-growth-factor-binding-protein-genes-in-cultured-atlantic-salmon-myotubes-under-different-models-of-catabolism-and-anabolism
#12
Daniel Garcia de la Serrana, Eduardo N Fuentes, Samuel A M Martin, Ian A Johnston, Daniel J Macqueen
Much attention has been given to insulin-like growth factor (Igf) pathways that regulate the balance of skeletal muscle protein synthesis and breakdown in response to a range of extrinsic and intrinsic signals. However, we have a less complete understanding of how the same signals modulate muscle mass upstream of such signalling, through a family of functionally-diverse Igf-binding proteins (Igfbps) that modify the availability of Igfs to the cell receptor Igf1r. We exposed cultured myotubes from Atlantic salmon (Salmo salar L...
January 18, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28102007/effects-of-diet-restriction-and-diet-complexity-on-life-history-strategies-in-side-blotched-lizards-uta-stansburiana
#13
Heather M Skinner, Andrew M Durso, Lorin A Neuman-Lee, Susan L Durham, Sarah D Mueller, Susannah S French
Organisms must balance energy invested into self-maintenance, reproduction, and somatic growth over their lifetime. In this study, the effects of diet restriction and diet complexity on side-blotched lizards (Uta stansburiana) were analyzed. Thirty male lizards, housed in the laboratory, were fed either an ad libitum or a restricted diet for 18 days (phase 1). Individuals from both treatments were then assigned to a diet of the same quantity of food that was either simple (only crickets) or complex (crickets, cockroaches, waxworms, and mealworms) for 35 days (phase 2)...
November 2016: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/28097305/enhanced-recovery-after-surgery-a-review
#14
Olle Ljungqvist, Michael Scott, Kenneth C Fearon
Importance: Enhanced Recovery After Surgery (ERAS) is a paradigm shift in perioperative care, resulting in substantial improvements in clinical outcomes and cost savings. Observations: Enhanced Recovery After Surgery is a multimodal, multidisciplinary approach to the care of the surgical patient. Enhanced Recovery After Surgery process implementation involves a team consisting of surgeons, anesthetists, an ERAS coordinator (often a nurse or a physician assistant), and staff from units that care for the surgical patient...
March 1, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28029066/cardiac-autonomic-and-haemodynamic-recovery-after-a-single-session-of-aerobic-exercise-with-and-without-blood-flow-restriction-in-older-adults
#15
Marina Lívia Venturini Ferreira, Amanda Veiga Sardeli, Giovana Vergínia De Souza, Valéria Bonganha, Lucas Do Carmo Santos, Alex Castro, Cláudia Regina Cavaglieri, Mara Patrícia Traina Chacon-Mikahil
This study investigated the autonomic and haemodynamic responses to different aerobic exercise loads, with and without blood flow restriction (BFR). In a crossover study, 21 older adults (8 males and 13 females) completed different aerobic exercise sessions: low load without BFR (LL) (40% VO2max), low load with BFR (LL-BFR) (40% VO2max + 50% BFR) and high load without BFR (HL) (70% VO2max). Heart rate variability and haemodynamic responses were recorded during rest and throughout 30 min of recovery. HL reduced R-R interval, the root mean square of successive difference of R-R intervals and high frequency during 30 min of recovery at a greater magnitude compared with LL and LL-BFR...
December 28, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28011455/individual-and-interactive-effects-of-drought-and-heat-on-leaf-physiology-of-seedlings-in-an-economically-important-crop
#16
Honglang Duan, Jianping Wu, Guomin Huang, Shuangxi Zhou, Wenfei Liu, Yingchun Liao, Xue Yang, Zufei Xiao, Houbao Fan
Heat waves in combination with drought are predicted to occur more frequently with climate warming, yet their interactive effects on crop carbon and water balance are still poorly understood. Hence, research on the capacity of crops to withstand and recover from the combined stress is urgently needed. This study investigated the effects of drought and heat wave on a crop species as well as the recovery from the combined stress. Seedlings were grown in growth chambers under two soil water conditions (i.e. well watered and drought stress) at ambient temperature (26°C) for 10 days...
December 22, 2016: AoB Plants
https://www.readbyqxmd.com/read/28005459/proceedings-of-the-2016-clinical-nutrition-week-research-workshop-the-optimal-dose-of-protein-provided-to-critically-ill-patients
#17
Daren K Heyland, Olav Rooyakers, Marina Mourtzakis, Renee D Stapleton
Recent literature has created considerable confusion about the optimal amount of protein/amino acids that should be provided to the critically ill patient. In fact, the evidentiary basis that directly tries to answer this question is relatively small. As a clinical nutrition research community, there is an urgent need to develop the optimal methods to assess the impact of exogenous protein/amino acid administration in the intensive care unit setting. That assessment can be conducted at various levels: (1) impact on stress response pathways, (2) impact on muscle synthesis and protein balance, (3) impact on muscle mass and function, and (4) impact on the patient's recovery...
February 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27987126/enhancing-tolerance-of-rice-oryza-sativa-to-simulated-acid-rain-by-exogenous-abscisic-acid
#18
Xi Wu, Chanjuan Liang
Abscisic acid (ABA) regulates much important plant physiological and biochemical processes and induces tolerance to different stresses. Here, we studied the regulation of exogenous ABA on adaptation of rice seedlings to simulated acid rain (SAR) stress by measuring biomass dry weight, stomatal conductance, net photosynthesis rate, nutrient elements, and endogenous hormones. The application of 10 μM ABA alleviated the SAR-induced inhibition on growth, stomatal conductance, net photosynthesis rate, and decreases in contents of nutrient (K, Mg, N, and P) and hormone (auxin, gibberellins, and zeatin)...
December 16, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27984075/moderate-aerobic-exercise-on-the-recovery-phase-of-gentamicin-induced-acute-kidney-injury-in-rats
#19
C S Oliveira, A M Rodrigues, G B Nogueira, M A Nascimento, G R Punaro, E M S Higa
INTRODUCTION: Acute kidney injury is a serious public health problem, especially in intensive care units, where patients may require dialysis support, resulting in 50% mortality. AIM: To evaluate the effects of moderate aerobic exercise on the recovery phase of acute kidney injury induced by gentamicin in rats. MAIN METHODS: Male adult Wistar rats were allocated into 4 groups: W10+R30, G10+R30, W10+EX30 and G10+EX30; W10 received water (gentamicin vehicle) and G10 received gentamicin for 10days; R30 remained resting and EX30 made exercise for 30days after gentamicin suspension...
January 15, 2017: Life Sciences
https://www.readbyqxmd.com/read/27918666/quantification-of-training-and-competition-loads-in-endurance-sports-methods-and-applications
#20
Iñigo Mujika
Training quantification is basic to evaluate an endurance athlete's responses to the training loads, ensure adequate stress/recovery balance and determine the relationship between training and performance. Quantifying both external and internal workload is important, because the external workload does not measure the biological stress imposed by the exercise sessions. Generally used quantification methods include retrospective questionnaires, diaries, direct observation and physiological monitoring, often based on the measurement of oxygen uptake, heart rate and blood lactate concentration...
December 5, 2016: International Journal of Sports Physiology and Performance
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