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https://www.readbyqxmd.com/read/28934381/carboxysomes-metabolic-modules-for-co2-fixation
#1
Aiko Turmo, C Raul Gonzalez-Esquer, Cheryl A Kerfeld
The carboxysome is a bacterial microcompartment encapsulating the enzymes carbonic anhydrase and ribulose-1,5-bisphosphate carboxylase/oxygenase. As the site of CO2 fixation, it serves an essential role in the carbon dioxide concentrating mechanism of many chemoautotrophs and all cyanobacteria. Carboxysomes and other bacterial microcompartments self-assemble through specific protein-protein interactions that are typically mediated by conserved protein domains. In this review, we frame our current understanding of carboxysomes in the context of their component protein domains with their inherent function as the 'building blocks' of carboxysomes...
October 2, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28931409/clinical-review-of-24-35%C3%A2-year-olds-conceived-with-and-without-in-vitro-fertilization-study-protocol
#2
Sharon Lewis, Joanne Kennedy, David Burgner, Robert McLachlan, Sarath Ranganathan, Karin Hammarberg, Richard Saffery, David J Amor, Michael M H Cheung, Lex W Doyle, Markus Juonala, Susan Donath, John McBain, Jane Halliday
BACKGROUND: Children conceived by assisted reproductive technologies (ART) currently comprise 4% of Australian births. The manipulation of biological parameters related to fertilization and implantation are integral to successful ART but potentially pose a risk to the longer-term health of the offspring. There is consensus that many common adult health problems (particularly cardiovascular, metabolic and respiratory conditions) have their origins in early life, possibly before birth, and that risk trajectories track through childhood until clinical disease manifests in adulthood...
September 20, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28930626/pilot-study-whole-body-manual-subcutaneous-adipose-tissue-sat-therapy-improved-pain-and-sat-structure-in-women-with-lipedema
#3
Karen L Herbst, Christopher Ussery, Alyna Eekema
Background Lipedema is a common painful subcutaneous adipose tissue (SAT) disorder in women affecting the limbs. SAT therapy is a manual therapy to improve soft tissue quality. Objective Determine if SAT therapy improves pain and structure of lipedema SAT. Design Single arm prospective pilot study. Setting Academic medical center. Patients Seven women, 46 ± 5 years, weight 90 ± 19 kg, with lipedema. Intervention Twelve 90-min SAT therapy sessions over 4 weeks. Outcomes Dual X-ray absorptiometry (DXA) scans, SAT ultrasound (Vevo 2100), leg volumetrics, skin caliper assessment, tissue exam, weight, resting metabolic rate, pain assessment, lower extremity functional scale (LEFS) and body shape questionnaire (BSQ) at baseline and end of study...
September 20, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28927953/comparison-of-a-handheld-indirect-calorimetry-device-and-predictive-energy-equations-among-individuals-on-maintenance-hemodialysis
#4
Ellis A Morrow, Andrea Marcus, Laura Byham-Gray
OBJECTIVES: Practical methods for determining resting energy expenditure (REE) among individuals on maintenance hemodialysis (MHD) are needed because of the limitations of indirect calorimetry. Two disease-specific predictive energy equations (PEEs) have been developed for this metabolically complex population. The aim of this study was to compare estimated REE (eREE) by PEEs to measured REE (mREE) with a handheld indirect calorimetry device (HICD). METHODS: A prospective pilot study of adults on MHD (N = 40) was conducted at 2 dialysis clinics in Houston and Texas City, Texas...
September 16, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/28927781/function-of-38-variants-cyp2c9-polymorphism-on-ketamine-metabolism-in%C3%A2-vitro
#5
Xiang Zheng, Ping Fang, Su-Su Bao, Dan Lin, Jian-Ping Cai, Guo-Xin Hu
BACKGROUND: Cytochrome P450 proteins (CYP 450) is the most important enzyme system of drug phase I metabolism in liver. In previous reports, reduced efficiency or increased risk of adverse events can be affected by primary sequence mutation in CYP450. AIM: To investigate the effect of gene polymorphism on the metabolism of ketamine in vitro, including the new alleles: 2C9*58, *59 and *60. METHOD: Incubation system which was contained insect microsome, b5, NADPH and 1M PBS incubated 10 μM-1000 μM ketamine in 37 °C for 40 min concentration of norketamine was analyzed by ultra-performance liquid chromatography-tandem mass spectrometry system (UPLC-MS/MS)...
September 1, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28925731/detection-of-metabolic-pattern-following-decompressive-craniectomy-in-severe-traumatic-brain-injury-a-microdialysis-study
#6
Deepak Gupta, Raghav Singla, Anna T Mazzeo, Eric B Schnieder, Vivek Tandon, S S Kale, A K Mahapatra
OBJECTIVE: The aim of the study was to detect mitochondrial dysfunction and ischaemia in severe traumatic brain injury and their relationship with outcome. METHODS: Forty-one patients with severe traumatic brain injury (TBI) who underwent decompressive craniectomy were prospectively monitored with intracerebral microdialysis catheters (MD). Variables related to energy metabolism were studied using microdialysis. RESULTS: Twentysix patients (63...
September 19, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28925405/intermittent-energy-restriction-improves-weight-loss-efficiency-in-obese-men-the-matador-study
#7
N M Byrne, A Sainsbury, N A King, A P Hills, R E Wood
BACKGROUND/OBJECTIVES: The MATADOR (Minimising Adaptive Thermogenesis And Deactivating Obesity Rebound) study examined whether intermittent energy restriction (ER) improved weight loss efficiency compared with continuous ER and, if so, whether intermittent ER attenuated compensatory responses associated with ER. SUBJECTS/METHODS: Fifty-one men with obesity were randomised to 16 weeks of either: (1) continuous (CON), or (2) intermittent (INT) ER completed as 8 × 2-week blocks of ER alternating with 7 × 2-week blocks of energy balance (30 weeks total)...
August 17, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28924987/influence-of-a-gas-exchange-correction-procedure-on-resting-metabolic-rate-and-respiratory-quotient-in-humans
#8
Jose E Galgani, Mauricio A Castro-Sepulveda
OBJECTIVE: The aim of this study was to determine the influence of a gas exchange correction protocol on resting metabolic rate (RMR) and respiratory quotient (RQ), assessed by a Vmax Encore 29n metabolic cart (SensorMedics Co., Yorba Linda, California) in overnight fasted and fed humans, and to assess the predictive power of body size for corrected and uncorrected RMR. METHODS: Healthy participants (23 M/29 F; 34 ± 9 years old; 26.3 ± 3.7 kg/m(2) ) ingested two 3-hour-apart glucose loads (75 g)...
September 19, 2017: Obesity
https://www.readbyqxmd.com/read/28921743/exercise-training-dose-differentially-alters-muscle-and-heart-capillary-density-and-metabolic-functions-in-an-obese-rat-with-metabolic-syndrome
#9
Marcus Vinicius Machado, Aline Bomfim Vieira, Fabiana Gomes da Conceição, Alessandro Rodrigues Nascimento, Antonio Claudio Lucas da Nóbrega, Eduardo Tibirica
We evaluated the effect of frequency, duration and intensity of exercise training on metabolic parameters and structural capillary density in obese rats with metabolic syndrome (MS). Wistar-Kyoto rats were fed a either standard commercial diet (CON) or high-fat diet (HFD). Animals that received the HFD were randomly separated into either a sedentary (SED) group or 8 different exercise groups that varied by the frequency, duration and intensity of training. After 12 weeks of aerobic exercise training, body composition, aerobic capacity, hemodynamic variables, metabolic parameters and capillary density in the heart and skeletal muscle were evaluated...
September 17, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28914733/metabolic-connectivity-methods-and-applications
#10
Igor Yakushev, Alexander Drzezga, Christian Habeck
PURPOSE OF REVIEW: Metabolic connectivity modelling aims to detect functionally interacting brain regions based on PET recordings with the glucose analogue [F]fluorodeoxyglucose (FDG). Here, we outline the most popular metabolic connectivity methods and summarize recent applications in clinical and basic neuroscience. RECENT FINDINGS: Metabolic connectivity is modelled by various methods including a seed correlation, sparse inverse covariance estimation, independent component analysis and graph theory...
September 13, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28912840/the-relationship-between-insulin-sensitivity-and-heart-rate-corrected-qt-interval-in-patients-with-type-2-diabetes
#11
Xiao-Hua Yang, Jian-Bin Su, Xiu-Lin Zhang, Li-Hua Zhao, Feng Xu, Xue-Qin Wang, Xing-Bo Cheng
BACKGROUND: Reduced insulin sensitivity not only contributes to the pathogenesis of type 2 diabetes but is also linked to multiple metabolic risk factors and cardiovascular diseases (CVD). A prolonged heart rate-corrected QT interval (QTc interval) is related to ventricular arrhythmias and CVD mortality and exhibits a high prevalence among type 2 diabetes patients. The aim of the study was to investigate the relationship between insulin sensitivity and the QTc interval in patients with type 2 diabetes...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28912339/reproductive-and-metabolic-features-during-puberty-in-sons-of-women-with-polycystic-ovary-syndrome
#12
Nicolas Crisosto, Barbara Echiburú, Manuel Maliqueo, Marta Luchsinger, Pedro Rojas, Sergio Recabarren, Teresa Sir-Petermann
CONTEXT: Intrauterine life may be implicated in the origin of polycystic cvary syndrome (PCOS) modifying the endocrine and metabolic function of children born to PCOS mothers independently of the genetic inheritance and gender. The aim of the present study was to evaluate the reproductive and metabolic function in sons of women with PCOS during puberty. METHODS: Sixty nine PCOSs and 84 control sons (Cs) 7 to 18 years old matched by Tanner stage score were studied...
September 14, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28911308/why-not-all-hypertensive-patients-are-tachycardic-at-rest
#13
Maciej Siński, Piotr Jędrusik, Jacek Lewandowski
BACKGROUND: The importance of increased resting heart rate in hypertensive patients was highlighted in the European Society of Hypertension statement on the identification and management of hypertensive patient with elevated heart rate. METHODS: Review of the available literature. RESULTS: Increased heart rate is an independent predictor of cardiovascular morbidity and mortality even after adjustment for other conventional cardiovascular risk factors...
June 7, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28905113/influence-of-increased-heart-rate-and-aortic-pressure-on-resting-indices-of-functional-coronary-stenosis-severity
#14
Lorena Casadonte, Bart-Jan Verhoeff, Jan J Piek, Ed VanBavel, Jos A E Spaan, Maria Siebes
Baseline assessment of functional stenosis severity has been proposed as a practical alternative to hyperemic indices. However, intact autoregulation mechanisms may affect intracoronary hemodynamics. The aim of this study was to investigate the effect of changes in aortic pressure (Pa) and heart rate (HR) on baseline coronary hemodynamics and functional stenosis assessment. In 15 patients (55 ± 3% diameter stenosis) Pa, intracoronary pressure (Pd) and flow velocity were obtained at control, and during atrial pacing at 120 bpm, increased Pa (+30 mmHg) with intravenous phenylephrine (PE), and elevated Pa while pacing at sinus heart rate (PE + sHR)...
September 13, 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28904459/clinical-biochemical-characteristics-and-hospital-outcome-of-acute-intermittent-porphyria-patients-a-descriptive-study-from-north-india
#15
Susheel Kumar, Ashish Bhalla, Navneet Sharma, Deba Prasad Dhibar, Savita Kumari, Subhash Varma
INTRODUCTION: Acute intermittent porphyria (AIP) is an inherited metabolic disease characterized by disordered heme biosynthesis. There is no recent study reported from India. MATERIALS AND METHODS: It was a retrospective, observational study. Clinical records of patients of AIP with acute porphyric attacks admitted from April 2008 to December 2016 were analyzed. RESULTS: Fifteen AIP patients constituted of eight females and seven males were analyzed...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28903724/resting-heart-rate-and-impaired-glucose-regulation-in-middle-aged-and-elderly-chinese-people-a-cross-sectional-analysis
#16
Zhen Yang, Weiwei Zhang, Lingfei Zhu, Ning Lin, Yixin Niu, Xiaoyong Li, Shuai Lu, Hongmei Zhang, Xuanchun Wang, Jie Wen, Guang Ning, Li Qin, Qing Su
BACKGROUND: Elevated resting heart rate (RHR) has been reported to be associated with metabolic syndrome and type 2 diabetes. The aim of this study was to explore whether a positive relationship exists between RHR and impaired glucose regulation (IGR) among middle-aged and older Chinese individuals. METHODS: We conducted a cross-sectional analysis that included a total of 9898 subjects (3194 men and 6704 women) in a Chinese population. The RHRs were derived from ECG recordings, and the subjects were stratified based on RHR quartiles...
September 13, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28902175/prediction-equations-overestimate-the-energy-requirements-more-for-obesity-susceptible-individuals
#17
Rebecca T McLay-Cooke, Andrew R Gray, Lynnette M Jones, Rachael W Taylor, Paula M L Skidmore, Rachel C Brown
Predictive equations to estimate resting metabolic rate (RMR) are often used in dietary counseling and by online apps to set energy intake goals for weight loss. It is critical to know whether such equations are appropriate for those susceptible to obesity. We measured RMR by indirect calorimetry after an overnight fast in 26 obesity susceptible (OSI) and 30 obesity resistant (ORI) individuals, identified using a simple 6-item screening tool. Predicted RMR was calculated using the FAO/WHO/UNU (Food and Agricultural Organisation/World Health Organisation/United Nations University), Oxford and Miflin-St Jeor equations...
September 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28899744/neural-and-metabolic-basis-of-dynamic-resting-state-fmri
#18
REVIEW
Garth J Thompson
Resting state fMRI (rsfMRI) as a technique showed much initial promise for use in psychiatric and neurological diseases where diagnosis and treatment were difficult. To realize this promise, many groups have moved towards examining "dynamic rsfMRI," which relies on the assumption that rsfMRI measurements on short time scales remain relevant to the underlying neural and metabolic activity. Many dynamic rsfMRI studies have demonstrated differences between clinical or behavioral groups beyond what static rsfMRI measured, suggesting a neurometabolic basis...
September 9, 2017: NeuroImage
https://www.readbyqxmd.com/read/28898316/-risk-factors-and-biochemical-markers-in-metabolic-bone-disease-of-premature-newborns
#19
Alicia Montaner Ramón, Cristina Fernández Espuelas, Pilar Calmarza Calmarza, Segundo Rite Gracia, María Jesús Oliván Del Cacho
BACKGROUND: Metabolic bone disease (MBD) of prematurity is a complication of multifactorial aetiology, which has been increasing, due to progressive decrease in mortality of preterm newborns. The aim of the study was to analyze risk factors of severe MBD and its analytical markers. PATIENTS AND METHOD: Retrospective study involving preterm infants less than 32 weeks gestational age and/or weight less tan 1,500 g born between january 2012 and december 2014. Comparison was made according to the presence of severe MBD...
2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28892884/effect-of-metaboreflex-on-cardiovascular-system-in-subjects-of-metabolic-syndrome
#20
Pramita Dubey, Sunita Tiwari, Manish Bajpai, Kalpana Singh, Praveen Jha
INTRODUCTION: Metaboreflex is a reflex in which muscle receptors send signals regarding metabolic (metabolites accumulation like lactic acid, potassium, adenosine) conditions of the muscles to nucleus tractus solitarius via afferent III and IV fibres to cause haemodynamic adjustments in order to regulate blood flow on the basis of the status of contracting muscle. Dysregulation in its mechanism in metabolic syndrome is demonstrated. AIM: To study the effect of metaboreflex by both isometric and rhythmic handgrip exercise on CVS parameters {Blood Pressure (BP), Cardiac Output (CO) and Systemic Vascular Resistance (SVR)} in subjects of metabolic syndrome...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
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