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Indirect calorimetry

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https://www.readbyqxmd.com/read/28633495/estradiol-protects-against-cardio-respiratory-dysfunctions-and-oxidative-stress-in-intermittent-hypoxia
#1
Sofien Laouafa, Alexandra Ribon-Demars, François Marcouiller, Damien Roussel, Aida Bairam, Vincent Pialoux, Vincent Joseph
Study Objectives: We tested the hypothesis that estradiol (E2) protects against cardio-respiratory disorders and oxidative stress induced by chronic intermittent hypoxia (CIH) in adult female rats. Methods: Sprague-Dawley female rats (230-250g) were ovariectomized (OVX) and implanted with osmotic pumps delivering vehicle (Veh) or E2 (0.5 mg/kg/day). After 14 days of recovery, the rats were exposed to chronic CIH (21%-10% O2 - 8 hours/day - 10 cycles/hour) or room air (RA)...
June 19, 2017: Sleep
https://www.readbyqxmd.com/read/28627208/irisin-is-weakly-associated-with-usual-physical-activity-in-young-overweight-women
#2
Beatriz Tenorio, Teresa Jiménez, Gladys Barrera, Sandra Hirsch, Maria Pia De la Maza, Rodrigo Troncoso, María Belén Farias, Juan Manuel Rodríguez, Daniel Bunout
PURPOSE: To determine if irisin plasma levels are associated with regular physical activity, body composition and metabolic parameters in women subjected to calorie restriction. SUBJECTS AND METHODS: We studied 42 women aged 34 ± 13 years with a body mass index of 27.7 ± 1.8 kg/m2, who were subjected to a calorie restriction for three months. At baseline and at the end of the study, weight, waist and hip circumference, laboratory parameters, body composition by DEXA, resting and activity energy expenditure by indirect calorimetry and 72 hours actigraphy were measured...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28626215/genetic-variation-in-the-obesity-gene-fto-is-not-associated-with-decreased-fat-oxidation-the-neo-study
#3
L L Blauw, R Noordam, S Trompet, J F P Berbée, F R Rosendaal, D van Heemst, K W van Dijk, D O Mook-Kanamori, R de Mutsert, P C N Rensen
BACKGROUND: The FTO gene harbours the strongest common genetic variant associated with obesity. Recently, rs1421085-T to -C substitution mapped in FTO was shown to induce a developmental shift of human adipocytes from an energy-combusting beige to an energy-storing white phenotype in vitro. As browning of adipocytes selectively enhances fat oxidation (FatOx), we hypothesized that rs1421085-C in FTO is associated with deceased FatOx compared with carbohydrate oxidation (CarbOx) and an increased respiratory quotient (RQ)...
June 19, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28623613/assessment-of-metabolic-flexibility-by-means-of-measuring-blood-lactate-fat-and-carbohydrate-oxidation-responses-to-exercise-in-professional-endurance-athletes-and-less-fit-individuals
#4
Iñigo San-Millán, George A Brooks
BACKGROUND: Increased muscle mitochondrial mass is characteristic of elite professional endurance athletes (PAs), whereas increased blood lactate levels (lactatemia) at the same absolute submaximal exercise intensities and decreased mitochondrial oxidative capacity are characteristics of individuals with low aerobic power. In contrast to PAs, patients with metabolic syndrome (MtS) are characterized by a decreased capacity to oxidize lipids and by early transition from fat to carbohydrate oxidation (FATox/CHOox), as well as elevated blood lactate concentration [La(-)] as exercise power output (PO) increases, a condition termed 'metabolic inflexibility'...
June 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28622349/a-randomized-cross-over-study-of-the-acute-effects-of-running-5-km-on-glucose-insulin-metabolic-rate-cortisol-and-troponin-t
#5
Boris Keselman, Marta Vergara, Sofia Nyberg, Fredrik H Nystrom
BACKGROUND: We aimed to study the impact by running 5 km, at maximal speed, on the normal variations of metabolic variables related to glucose, insulin, insulin sensitivity, cortisol, glucagon, Troponin T and metabolic rate. MATERIAL AND METHODS: Five women and 12 men 25.7±5.2 years of age with a body-mass-index of 22.5±2.3 kg/m2 where recruited to run 5 km at individual maximal speed in the morning, and to a corresponding day of rest, followed by standardized breakfast and lunch meals...
2017: PloS One
https://www.readbyqxmd.com/read/28618864/gut-microbiota-composition-strongly-correlates-to-peripheral-insulin-sensitivity-in-obese-men-but-not-in-women
#6
J Most, G H Goossens, D Reijnders, E E Canfora, J Penders, E E Blaak
Gut microbiota composition may play an important role in the development of obesity-related comorbidities. However, only few studies have investigated gender-differences in microbiota composition and gender-specific associations between microbiota or microbial products and insulin sensitivity. Insulin sensitivity (hyperinsulinemic-euglycemic clamp), body composition (dual energy X-ray absorptiometry), substrate oxidation (indirect calorimetry), systemic inflammatory markers and microbiota composition (PCR) were determined in male (n=15) and female (n=14) overweight and obese subjects...
June 16, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28608135/can-proportional-ventilation-modes-facilitate-exercise-in-critically-ill-patients-a-physiological-cross-over-study-pressure-support-versus-proportional-ventilation-during-lower-limb-exercise-in-ventilated-critically-ill-patients
#7
Evangelia Akoumianaki, Nicolas Dousse, Aissam Lyazidi, Jean-Claude Lefebvre, Severine Graf, Ricardo Luiz Cordioli, Nathalie Rey, Jean-Christophe Marie Richard, Laurent Brochard
BACKGROUND: Early exercise of critically ill patients may have beneficial effects on muscle strength, mass and systemic inflammation. During pressure support ventilation (PSV), a mismatch between demand and assist could increase work of breathing and limit exercise. A better exercise tolerance is possible with a proportional mode of ventilation (Proportional Assist Ventilation, PAV+ and Neurally Adjusted Ventilatory Assist, NAVA). We examined whether, in critically ill patients, PSV and proportional ventilation have different effects on respiratory muscles unloading and work efficiency during exercise...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28606569/dual-energy-x-ray-absorptiometry-metabolic-maps-to-resting-energy-expenditure-estimation-and-body-size-dependence-in-brazilian-young-men
#8
Juliano Henrique Borges, Raquel David Langer, Vagner Xavier Cirolini, Mauro Alexandre Páscoa, Gil Guerra-Júnior, Ezequiel Moreira Gonçalves
OBJECTIVES: The model most suitable for estimating resting energy expenditure (REE) using dual-energy X-ray absorptiometry (DXA) metabolic maps is not known; moreover, the applicability in individuals with different body sizes also is uncertain. The aim of this study was to test the accuracy of REE estimation from models of DXA metabolic maps with four, five, and six tissue-organ components in young men, stratified by body size. METHODS: We studied 52 young men between the ages of 18 and 29 y...
July 2017: Nutrition
https://www.readbyqxmd.com/read/28606568/energy-expenditure-in-the-immediate-postpartum-period-indirect-calorimetry-versus-predictive-equations
#9
Taciana Maia de Sousa, Tatiani Uceli Maioli, Ana Luiza Soares Dos Santos, Luana Caroline Dos Santos
OBJECTIVE: The aim of this study was to evaluate the resting energy expenditure (REE) of postpartum women by indirect calorimetry and to provide the most appropriate predictive equations to estimate it. METHODS: This was a cross-sectional study with 79 women in the maternity unit of a Brazilian city hospital. Information regarding age, income, gestational age, and breastfeeding was collected. Height, weight, and body composition were measured. We measured REE by indirect calorimetry and predicted REE using eight equations...
July 2017: Nutrition
https://www.readbyqxmd.com/read/28605113/muscle-carnitine-availability-plays-a-central-role-in-regulating-fuel-metabolism-in-the-rodent
#10
Craig Porter, Dumitru Constantin-Teodosiu, Despina Constantin, Brendan Leighton, Simon M Poucher, Paul L Greenhaff
The body carnitine pool is primarily confined to skeletal muscle, where it regulates carbohydrate (CHO) and fat usage. Mildronate (3-(2,2,2-trimethylhydrazinium)-propionate) inhibits carnitine synthesis and tissue uptake, but the impact of carnitine depletion on whole-body fuel selection, muscle fuel metabolism and its molecular regulation is under-investigated. Male lean Zucker rats received water (control, n = 8) or mildronate-supplemented water (mildronate, n = 8) for 10 days (1.6 g kg(-1) body mass (bm)(...
June 12, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28599895/variations-in-resting-energy-expenditure-impact-on-gestational-weight%C3%A2-gain
#11
Ek Berggren, P O'Tierney-Ginn, S Lewis, L Presley, S Hauguel De-Mouzon, P M Catalano
BACKGROUND: There are significant variations in gestational weight gain, with many women gaining in excess of the Institute of Medicine guidelines. Unfortunately, efforts to improve appropriate gestational weight gain have had only limited success. To date, interventions have focused primarily on decreasing energy intake and/or increasing physical activity. Maternal resting energy expenditure, which comprises ∼60% of total energy expenditure compared with the ∼20% that comes from physical activity, may be an important consideration in understanding variations in gestational weight gain...
June 17, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28599662/a-randomized-controlled-pilot-study-to-evaluate-the-effect-of-an-enteral-formulation-designed-to-improve-gastrointestinal-tolerance-in-the-critically-ill-patient-the-spirit-trial
#12
Stephan M Jakob, Lukas Bütikofer, David Berger, Michael Coslovsky, Jukka Takala
BACKGROUND: Diarrhea is frequent in patients in intensive care units (ICU) and is associated with discomfort and complications and may increase the length of stay and nursing workload. METHODS: This was a prospective, double-blind, randomized, controlled single-center pilot study to assess the incidence and frequency of diarrhea and the respective effects of a modified enteral diet (intervention: Peptamen® AF, rich in proteins, medium chain triglycerides and fish oil) compared to a standard diet (control: Isosource® Energy) in 90 randomized adult patients (intervention, n = 46; control, n = 44) with an ICU stay ≥5 days and tube feeding ≥3 days...
June 10, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28589947/gut-microbiota-composition-in-relation-to-the-metabolic-response-to-12-week-combined-polyphenol-supplementation-in-overweight-men-and-women
#13
J Most, J Penders, M Lucchesi, G H Goossens, E E Blaak
BACKGROUND/OBJECTIVES: The intestinal microbiota may have a profound impact on host metabolism. As evidence suggests that polyphenols affect substrate utilization, the present study aimed to investigate the effects of polyphenol supplementation on intestinal microbiota composition in humans. Furthermore, we examined whether (changes in) gut microbiota composition may determine the metabolic response to polyphenol supplementation. SUBJECTS/METHODS: In this randomized, double-blind, placebo (PLA)-controlled trial, 37 overweight and obese men and women (18 males/19 females, 37...
June 7, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28575581/development-and-validation-of-a-new-cardio-specific-resting-energy-expenditure-equation-for-adults
#14
Sergey Mihailovich Efremov, Valeria Olegovna Talaban, Dmitry Nikolaevich Ponomarev, Pavel Eugenyevich Vedernikov, Mihail Gennadyevich Chechenin, Victoria Vladimirovna Artemieva, Vladimir Vladimirovich Lomivorotov
BACKGROUND: This study tested the accuracy of resting energy expenditure (REE) equations among patients who underwent cardiopulmonary bypass and developed/validated a more accurate cardio-specific equation (CSE). MATERIALS AND METHODS: Prospective observational cohort of 240 adults (derivation data set, 170 patients; validation data set, 70 patients). REEs were calculated with 6 equations-Penn State 2003a, Penn State 2003b, Ireton-Jones, Swinamer, Faisy, and American College of Chest Physicians-and results were compared with indirect calorimetry (IC)...
June 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28574294/guidelines-for-the-provision-and-assessment-of-nutrition-support-therapy-in-the-pediatric-critically-ill-patient-society-of-critical-care-medicine-and-american-society-for-parenteral-and-enteral-nutrition
#15
Nilesh M Mehta, Heather E Skillman, Sharon Y Irving, Jorge A Coss-Bu, Sarah Vermilyea, Elizabeth Anne Farrington, Liam McKeever, Amber M Hall, Praveen S Goday, Carol Braunschweig
This document represents the first collaboration between 2 organizations-the American Society for Parenteral and Enteral Nutrition and the Society of Critical Care Medicine-to describe best practices in nutrition therapy in critically ill children. The target of these guidelines is intended to be the pediatric critically ill patient (>1 month and <18 years) expected to require a length of stay >2-3 days in a PICU admitting medical, surgical, and cardiac patients. In total, 2032 citations were scanned for relevance...
May 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28567513/age-dependent-insulin-resistance-in-male-mice-with-null-deletion-of-the-carcinoembryonic-antigen-related-cell-adhesion-molecule-2-gene
#16
Simona S Ghanem, Harrison T Muturi, Anthony M DeAngelis, Jiang Hu, Rohit N Kulkarni, Garrett Heinrich, Sonia M Najjar
AIMS/HYPOTHESIS: Cc2 (-/-) mice lacking the gene encoding the carcinoembryonic-antigen-related cell adhesion molecule 2 (Cc2 [also known as Ceacam2]) exhibit hyperphagia that leads to obesity and insulin resistance. This starts at 2 months of age in female mice. Male mutants maintain normal body weight and insulin sensitivity until the last age previously examined (7-8 months), owing to increased sympathetic tone to white adipose tissue and energy expenditure. The current study investigates whether insulin resistance develops in mutant male mice at a later age and whether this is accompanied by changes in insulin homeostasis...
May 31, 2017: Diabetologia
https://www.readbyqxmd.com/read/28567018/acute-normobaric-hypoxia-increases-post-exercise-lipid-oxidation-in-healthy-males
#17
Liam P Kelly, Fabien A Basset
The primary objective of the current study was to determine the effect of moderate normobaric hypoxia exposure during constant load cycling on post-exercise energy metabolism recorded in normoxia. Indirect calorimetry was used to examine whole body substrate oxidation before, during, 40-60 min post, and 22 h after performing 60 min of cycling exercise at two different fractions of inspired oxygen (FIO2): (i) FIO2 = 0.2091 (normoxia) and (ii) FIO2 = 0.15 (hypoxia). Seven active healthy male participants (26 ± 4 years of age) completed both experimental trials in randomized order with a 7-day washout period to avoid carryover effects between conditions...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28555111/novel-glp-1-analog-supaglutide-reduces-hfd-induced-obesity-associated-with-increased-ucp-1-in-white-adipose-tissue-in-mice
#18
Yun Wan, Xi Bao, Jiabao Huang, Xiangyu Zhang, Wenjuan Liu, Qiaoli Cui, Dongdong Jiang, Zhihong Wang, Rui Liu, Qinghua Wang
GLP-1, an important incretin hormone plays an important role in the regulation of glucose homeostasis. However, the therapeutic use of native GLP-1 is limited due to its short half-life. We recently developed a novel GLP-1 mimetics (supaglutide) by genetically engineering recombinant fusion protein production techniques. We demonstrated that this formulation possessed long-lasting GLP-1 actions and was effective in glycemic control in both type 1 and type 2 diabetes rodent models. Here, we investigated the effects of supaglutide in regulating energy homeostasis in obese mice...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28549221/preventing-underfeeding-and-overfeeding-a-clinician-s-guide-to-the-acquisition-and-implementation-of-indirect-calorimetry
#19
Amy K Ladd, Heather E Skillman, Matthew A Haemer, Peter M Mourani
BACKGROUND: In critically ill patients, indirect calorimetry (IC) is the gold standard to determine energy needs, as the use of predictive equations can result in underfeeding or overfeeding. The aim of this quality improvement (QI) initiative was to describe the rationale for and implementation of a process to target energy provision according to IC measurements in a tertiary academic medical center pediatric intensive care unit (PICU). MATERIALS AND METHODS: To justify the purchase of an indirect calorimeter for clinical use, a needs assessment was conducted, followed by a training and implementation period...
May 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28546468/influence-of-maximal-fat-oxidation-on-long-term-weight-loss-maintenance-in-humans
#20
Sune Dandanell, Karina Husted, Signe Amdisen, Andreas Vigelsø, Flemming Dela, Steen Larsen, Jorn Wulff Helge
Impaired maximal fat oxidation has been linked to obesity and weight regain after weight loss. The aim was to investigate the relationship between maximal fat oxidation (MFO) and long-term weight loss maintenance. Eighty subjects (mean(SD)) (Age: 36(13) yrs; BMI: 38(1) kg/m(2)) were recruited from a total of 2420 former participants of an 11-12-week lifestyle intervention. Three groups were established based on % weight loss at follow-up (5.3(3.3) yrs): Clinical weight loss maintenance (CWL) >10% weight loss, moderate weight loss (MWL) 1-10%, and weight regain (WR)...
May 25, 2017: Journal of Applied Physiology
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