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"Intracellular water"

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https://www.readbyqxmd.com/read/29146716/dynamic-contrast-enhanced-mri-derived-intracellular-water-lifetime-%C3%AF-i-a-prognostic-marker-for-patients-with-head-and-neck-squamous-cell-carcinomas
#1
S Chawla, L A Loevner, S G Kim, W-T Hwang, S Wang, G Verma, S Mohan, V LiVolsi, H Quon, H Poptani
BACKGROUND AND PURPOSE: Shutter-speed model analysis of dynamic contrast-enhanced MR imaging allows estimation of mean intracellular water molecule lifetime (a measure of cellular energy metabolism) and volume transfer constant (a measure of hemodynamics). The purpose of this study was to investigate the prognostic utility of pretreatment mean intracellular water molecule lifetime and volume transfer constant in predicting overall survival in patients with squamous cell carcinomas of the head and neck and to stratify p16-positive patients based upon survival outcome...
November 16, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29106751/fast-na-k-pump-driven-steady-state-transcytolemmal-water-exchange-in-neuronal-tissue-a-study-of-rat-brain-cortical-cultures
#2
Ruiliang Bai, Charles S Springer, Dietmar Plenz, Peter J Basser
PURPOSE: Water homeostasis and transport play important roles in brain function (e.g., ion homeostasis, neuronal excitability, cell volume regulation, etc.). However, specific mechanisms of water transport across cell membranes in neuronal tissue have not been completely elaborated. METHODS: The kinetics of transcytolemmal water exchange were measured in neuronal tissue using simultaneous, real-time fluorescence and nuclear magnetic resonance (NMR) measurements of perfused, active brain organotypic cortical cultures...
November 6, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29077582/neuroimaging-in-the-diagnosis-of-chronic-traumatic-encephalopathy-a-systematic-review
#3
Philip Sparks, Tim Lawrence, Stephan Hinze
OBJECTIVE: Chronic traumatic encephalopathy (CTE) is a neurodegenerative tauopathy associated with repeated subconcussive and concussive head injury. Clinical features include cognitive, behavioral, mood, and motor impairments. Definitive diagnosis is only possible at postmortem. Here, the utility of neuroimaging in the diagnosis of CTE is evaluated by systematically reviewing recent evidence for changes in neuroimaging biomarkers in suspected cases of CTE compared with controls. DATA SOURCES: Providing an update on a previous systematic review of articles published until December 2014, we searched for articles published between December 2014 and July 2016...
October 25, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29026086/picosecond-orientational-dynamics-of-water-in-living-cells
#4
Martijn Tros, Linli Zheng, Johannes Hunger, Mischa Bonn, Daniel Bonn, Gertien J Smits, Sander Woutersen
Cells are extremely crowded, and a central question in biology is how this affects the intracellular water. Here, we use ultrafast vibrational spectroscopy and dielectric-relaxation spectroscopy to observe the random orientational motion of water molecules inside living cells of three prototypical organisms: Escherichia coli, Saccharomyces cerevisiae (yeast), and spores of Bacillus subtilis. In all three organisms, most of the intracellular water exhibits the same random orientational motion as neat water (characteristic time constants ~9 and ~2 ps for the first-order and second-order orientational correlation functions), whereas a smaller fraction exhibits slower orientational dynamics...
October 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/29018100/randomized-crossover-trial-of-blood-volume-monitoring-guided-ultrafiltration-biofeedback-to-reduce-intradialytic-hypotensive-episodes-with-hemodialysis
#5
Kelvin C W Leung, Robert R Quinn, Pietro Ravani, Henry Duff, Jennifer M MacRae
BACKGROUND AND OBJECTIVES: Intradialytic hypotension (IDH) is associated with morbidity. The effect of blood volume-guided ultrafiltration biofeedback, which automatically adjusts fluid removal rate on the basis of blood volume parameters, on the reduction of IDH was tested in a randomized crossover trial. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We performed a 22-week, single blind, randomized crossover trial in patients receiving maintenance hemodialysis who had >30% of sessions complicated by symptomatic IDH in five centers in Calgary, Alberta, Canada...
November 7, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28979785/estimated-dietary-sodium-intake-in-haemodialysis-patients-using-food-frequency-questionnaires
#6
Anastasia Gkza, Andrew Davenport
BACKGROUND: In clinical practice, dietary sodium assessment requires reliable and rapid screening tools. We wished to evaluate the usefulness of food frequency questionnaires (FFQ) in estimating dietary sodium intakes in haemodialysis patients. METHODS: We used the Derby Salt Questionnaire (DSQ), and Scored Sodium Questionnaire (SSQ) to estimate sodium intake. Body composition was determined by bioimpedance. RESULTS: In total, 139 haemodialysis patients (95 men) completed the FFQs, with mean ± standard deviation age 67 ± 15 years...
October 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28971467/bioimpedance-measurements-in-adolescents-with-polycystic-ovary-syndrome-a-pilot-study
#7
Styliani A Geronikolou, Flora Bacopoulou, Dennis Cokkinos
Limited data are available on the body composition of adolescent women with polycystic ovary syndrome (PCOS). The aim of this study was to examine differences in body composition indices of metabolism, homeostasis and inflammation, between Greek adolescent females suffering from PCOS and age- and body mass index (BMI)-matched non-PCOS controls. Thirteen PCOS patients and nine non-PCOS controls, aged 13-24 years participated in this cross-sectional study. Study participants underwent assessment by a novel dual frequency bioimpedance device (BIA-ACC)...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28830412/body-composition-and-personality-traits-in-so-yang-type-males
#8
Jiwon Yoon, Jiho Nam, Chae Hun Leem, Jong Yeol Kim
BACKGROUND: The purpose of the present study was to examine the body composition of So-Yang type males according to Sasang constitutional medicine, which is popular in Korea. Different Sasang constitutional types are associated with different muscle distributions, body shapes, and disease susceptibilities. We used the Sasang Personality Questionnaire (SPQ) as a measure of the temperament of each Sasang type. METHODS: In total, 953 subjects aged over 20 years were recruited in Korea...
August 22, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28820993/changing-profiles-of-bound-water-content-and-distribution-in-the-activated-sludge-treatment-by-nacl-addition-and-ph-modification
#9
Dong-Qin He, Ying-Jie Zhang, Chuan-Shu He, Han-Qing Yu
Currently the dewatering of activated sludge from wastewater treatment plants is a problem not well solved. Extracellular polymeric substances (EPS), including loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS), are highly hydrated biopolymers and play important roles in sludge dewatering. In the present work, two types of treatments, i.e., salt addition and pH modification, were proposed to evaluate the effects of bound water content and its distribution on the dewatering performance of activated sludge...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28757053/cryopreservation-of-indian-red-jungle-fowl-gallus-gallus-murghi-semen-with-polyvinylpyrrolidone
#10
Bushra Allah Rakha, Muhammad Sajjad Ansari, Shamim Akhter, Zartasha Zafar, Iftikhar Hussain, Julian Santiago-Moreno, Elisabeth Blesbois
The Indian red jungle fowl is a sub-species of the genus Gallus native to South Asia; facing high risk of extinction in its native habitat. During cryopreservation, permeable cryoprotectants like glycerol are usually employed and we previously showed encouraging results with 20% glycerol. Because bird spermatozoa contain very little intracellular water, the possibility of replacing an internal cryoprotectant by an external one is opened. In the present study, we tested the replacement of internal cryoprotectant glycerol by the external cryoprotectant Polyvinylpyrrolidone (PVP)...
July 27, 2017: Cryobiology
https://www.readbyqxmd.com/read/28755131/increase-in-echo-intensity-and-extracellular-to-intracellular-water-ratio-is-independently-associated-with-muscle-weakness-in-elderly-women
#11
Masashi Taniguchi, Yosuke Yamada, Yoshihiro Fukumoto, Shinichiro Sawano, Seigo Minami, Tome Ikezoe, Yuya Watanabe, Misaka Kimura, Noriaki Ichihashi
PURPOSE: The changes in muscle composition and its heterogeneity during aging are associated with muscle weakness in elderly persons independent of decreases in muscle mass or muscle thickness (MT). Both the assessment of echo intensity (EI) with ultrasound imaging and the evaluation of the extracellular water/intracellular water (ECW/ICW) ratio with segmental bioelectrical impedance spectroscopy (BIS) are non-invasive and convenient methods and seem valuable for muscle quality determination...
October 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28701677/mechanisms-of-diuresis-for-acute-decompensated-heart-failure-by-tolvaptan
#12
RANDOMIZED CONTROLLED TRIAL
Hidetsugu Nomoto, Yasuhiro Satoh, Mayu Kamiyama, Kento Yabe, Mayumi Masumura, Atsushi Sakakibara, Shu Yamashita, Masahito Suzuki, Tomoyo Sugiyama, Tetsuo Oumi, Masakazu Ohno, Yoshihide Takahashi, Mitsuaki Isobe
Tolvaptan, a vasopressin type 2 receptor antagonist, does not affect kidney circulation or cause worsening of renal function (WRF) in patients with acute decompensated heart failure (ADHF). Bioelectrical impedance analysis (BIA) can be used to evaluate intravascular volume by calculating the ratio of extracellular water (ECW) to intracellular water (ICW). There have been no reports examining the mechanisms of tolvaptan-induced diuresis using BIA. We investigated whether tolvaptan decreases excess volume while maintaining intravascular volume in ADHF patients...
August 3, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28699923/the-effects-of-moderate-versus-high-load-resistance-training-on-muscle-growth-body-composition-and-performance-in-collegiate-women
#13
Jason M Cholewa, Fabricio E Rossi, Christopher MacDonald, Amy Hewins, Samantha Gallo, Ashley Micenski, Layne Norton, Bill I Campbell
Twenty young women (20.3+1.5 years, 164+6 cm, 68.7+13.8 kg) without prior structured resistance training experience were recruited for this study. Body composition (BodPod), compartmental water (Bioelectrical Impedance), 7-site skinfold, and arm and thigh CSA were assessed pre- and post- 8 week training. Performance testing consisted of vertical jump, 3 kg chest pass initial velocity, squat 1RM and overhead press 1RM. Following 2 weeks of familiarization training, subjects were matched for body composition and relative squat strength, and randomly assigned to either a high- (HL: n=10; 4 sets of 5-7 repetitions) or moderate-load (ML: n=10; 2 sets of 10-14 repetitions) group that completed 6-7 exercises per day performed to momentary muscular failure...
June 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28675497/intracellular-water-preexchange-lifetime-in-neurons-and-astrocytes
#14
Donghan M Yang, James E Huettner, G Larry Bretthorst, Jeffrey J Neil, Joel R Garbow, Joseph J H Ackerman
PURPOSE: To determine the intracellular water preexchange lifetime, τi , the "average residence time" of water, in the intracellular milieu of neurons and astrocytes. The preexchange lifetime is important for modeling a variety of MR data sets, including relaxation, diffusion-sensitive, and dynamic contrast-enhanced data sets. METHODS: Herein, τi in neurons and astrocytes is determined in a microbead-adherent, cultured cell system. In concert with thin-slice selection, rapid flow of extracellular media suppresses extracellular signal, allowing determination of the transcytolemmal-exchange-dominated, intracellular T1 ...
July 4, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28624094/the-impact-of-pulsed-electric-fields-and-ultrasound-on-water-distribution-and-loss-in-mushrooms-stalks
#15
Nicolò Dellarosa, Daniele Frontuto, Luca Laghi, Marco Dalla Rosa, James G Lyng
Pulsed electric fields (PEF) and ultrasound (US) are promising innovative technologies with the potential to increase mass transfer when combined with further processes which in turn can provide potential benefits in the recovery of valuable compounds from food by-products. To provide evidence of the mechanism of mass transfer enhancement, the present study assessed the impact of PEF and US treatments, applied individually and in combination, at low and high temperatures, on the tissue microstructure of mushroom stalks...
December 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28611859/ipragliflozin-improves-glycemic-control-and-decreases-body-fat-in-patients-with-type-2-diabetes-mellitus
#16
Takehiro Kawata, Takashi Iizuka, Kotaro Iemitsu, Masahiro Takihata, Masahiko Takai, Shigeru Nakajima, Nobuaki Minami, Shinichi Umezawa, Akira Kanamori, Hiroshi Takeda, Shogo Ito, Taisuke Kikuchi, Hikaru Amemiya, Mizuki Kaneshiro, Atsuko Mokubo, Tetsuo Takuma, Hideo Machimura, Keiji Tanaka, Taro Asakura, Akira Kubota, Sachio Aoyanagi, Kazuhiko Hoshino, Masashi Ishikawa, Yoko Matsuzawa, Mitsuo Obana, Nobuo Sasai, Hideaki Kaneshige, Fuyuki Minagawa, Tatsuya Saito, Kazuaki Shinoda, Masaaki Miyakawa, Yasushi Tanaka, Yasuo Terauchi, Ikuro Matsuba
BACKGROUND: Ipragliflozin, a sodium-glucose transporter 2 inhibitor, was administered to patients with type 2 diabetes mellitus for 24 weeks to evaluate its effect on glycemic control and body composition. METHODS: This was an investigator-initiated multicenter prospective intervention study in which ipragliflozin (50 mg) was administered once daily and glycemic control, blood pressure, body weight (BW), body composition (measured by a biological impedance method), the lipid profile, and adverse events were evaluated after 4, 12, and 24 weeks of treatment...
July 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28601150/progress-and-challenges-of-fish-sperm-vitrification-a-mini-review
#17
REVIEW
Miaomiao Xin, Mohammad Abdul Momin Siddique, Borys Dzyuba, Rafael Cuevas-Uribe, Anna Shaliutina-Kolešová, Otomar Linhart
To survive low temperature is required for a long-term storage (cryopreservation), cells should be vitrified to a state in which intracellular water is solidified without ice crystal formation. Two different approaches are described for fish sperm cryopreservation: 1) sperm conventional cryopreservation, in which extracellular water is partially crystallized and 2) sperm vitrification, in which both intra- and extra-cellular liquids are vitrified. Sperm vitrification has been applied to some fish species with limited success...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28549919/microscopic-diffusion-in-hydrated-encysted-eggs-of-brine-shrimp
#18
E Mamontov
BACKGROUND: We have studied microscopic diffusion of water in fully hydrated encysted eggs of brine shrimp (Artemia). METHODS: We have utilized quasielastic neutron scattering. RESULTS: Dry eggs of brine shrimp were rehydrated using (1) water without additives, (2) eutectic mixture of water and dimethyl sulfoxide, and (3) a concentrated aqueous solution of lithium chloride. Despite the complexity of the hydrated multicellular organism, measurable microscopic diffusivity of water is rather well defined...
September 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28528793/comparison-of-dual-energy-x-ray-absorptiometry-and-bioimpedance-in-assessing-body-composition-and-nutrition-in-peritoneal-dialysis-patients
#19
Velena Popovic, Bo Zerahn, James Goya Heaf
OBJECTIVE: Peritoneal dialysis (PD) patients are characterized by protein malnutrition and muscle wasting. Reliable, easy, and cheap methods for evaluating nutrition are desirable. Three methods are commonly available: dual-energy X-ray absorptiometry (DXA), bioimpedance (BI), and subjective global assessment (SGA).The objective of the study was to compare the previously mentioned methods for assessment of body composition and nutritional status in PD patients. DESIGN: The study is cross-sectional and consisted of 72 PD patients from a single center PD ambulatorium...
May 18, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/28514233/energy-balance-over-one-athletic-season
#20
Analiza M Silva, Catarina N Matias, Diana A Santos, Diana Thomas, Anja Bosy-Westphal, Manfred J Müller, Steven B Heymsfield, Luís B Sardinha
INTRODUCTION: Magnitude and variation in energy balance (EB) components over an athletic season are largely unknown. PURPOSE: We investigated the longitudinal changes in EB over one season and explored the association between EB variation and change in the main fat-free mass (FFM) components in highly trained athletes. METHODS: Eighty athletes (54 males; handball, volleyball, basketball, triathlete, and swimming) were evaluated from the beginning of the season to the main competition stage...
August 2017: Medicine and Science in Sports and Exercise
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