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https://www.readbyqxmd.com/read/28350695/icrp-67-biokinetic-models-for-am-241-applied-to-nonhuman-primates
#1
Nada A Alomairy, Richard R Brey, Raymond A Guilmette
Between 1960 and 1985, Patricia Durbin and colleagues performed studies on the distribution of intravenously and intramuscularly injected Am citrate with dosages ranging from 16 to 32 kBq kg in 30 male and female non-human primates (NHP). Dr. Durbin died unexpectedly in March of 2009, leaving much of the extensive serial blood, bioassay, and autopsy data from these NHP studies unanalyzed. As part of the experimental design, serial blood samples were taken, and urine and feces samples were collected separately for the duration of the study...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350537/comparison-of-structured-and-unstructured-physical-activity-training-on-predicted-vo2max-and-heart-rate-variability-in-adolescents-a-randomized-control-trial
#2
Vivek Kumar Sharma, Senthil Kumar Subramanian, Krishnakumar Radhakrishnan, Rajathi Rajendran, Balasubramanian Sulur Ravindran, Vinayathan Arunachalam
BACKGROUND: Physical inactivity contributes to many health issues. The WHO-recommended physical activity for adolescents encompasses aerobic, resistance, and bone strengthening exercises aimed at achieving health-related physical fitness. Heart rate variability (HRV) and maximal aerobic capacity (VO2max) are considered as noninvasive measures of cardiovascular health. The objective of this study is to compare the effect of structured and unstructured physical training on maximal aerobic capacity and HRV among adolescents...
March 28, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28346681/obstructive-sleep-apnea-and-postoperative-complications-among-patients-undergoing-gynecologic-oncology-surgery
#3
Olumuyiwa A Bamgbade, Rong R Khaw, Raisah S Sawati, Cathrine M Holland
OBJECTIVE: To investigate the prevalence of obstructive sleep apnea (OSA), physiological or risk factors associated with OSA, and OSA-associated postoperative complications among patients undergoing gynecologic oncology surgery. METHODS: A prospective observational study was done of gynecologic oncology patients undergoing abdominal surgery at a center in the UK between August 2009 and January 2013. All patients underwent perioperative sleep oximetry for the diagnosis of OSA...
March 27, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28346571/is-the-ergogenicity-of-caffeine-affected-by-increasing-age-the-direct-effect-of-a-physiological-concentration-of-caffeine-on-the-power-output-of-maximally-stimulated-edl-and-diaphragm-muscle-isolated-from-the-mouse
#4
J Tallis, R S James, V M Cox, M J Duncan
INTRODUCTION: Caffeine is a well-established performance enhancing nutritional supplement in a young healthy population, however far less is known about how its ergogenicity is affected by increasing age. A recent review has highlighted the value of studies examining the direct effect of caffeine on isolated skeletal muscle contractility, but the present work is the first to assess the direct effect of 70µM caffeine (physiological maximum) on the maximal power output of isolated mammalian muscle from an age range representing developmental to early ageing...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28346561/reduced-intestinal-motility-mucosal-barrier-function-and-inflammation-in-aged-monkeys
#5
E L Mitchell, A T Davis, K Brass, M Dendinger, R Barner, R Gharaibeh, A A Fodor, K Kavanagh
OBJECTIVE: We aimed to examine the general health and intestinal physiology of young and old non-human primates with comparable life histories and dietary environments. DESIGN: Vervet monkeys (Chlorcebus aethiops sabaeus) in stable and comparable social and nutritional environments were selected for evaluation. Health phenotype, circulating cytokines and biomarkers of microbial translocation (MT) were measured (n=26-44). Subsets of monkeys additionally had their intestinal motility, intestinal permeability, and fecal microbiomes characterized...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28346535/caudwell-xtreme-everest-a-prospective-study-of-the-effects-of-environmental-hypoxia-on-cognitive-functioning
#6
Konstadina Griva, Jan Stygall, Mark H Wilson, Daniel Martin, Denny Levett, Kay Mitchell, Monty Mythen, Hugh E Montgomery, Mike P Grocott, Golnar Aref-Adib, Mark Edsell, Tracie Plant, Chris Imray, Debbie Cooke, Jane Harrington, Maryam Khosravi, Stanton P Newman
BACKGROUND: The neuropsychological consequences of exposure to environmental hypobaric hypoxia (EHH) remain unclear. We thus investigated them in a large group of healthy volunteers who trekked to Mount Everest base camp (5,300 m). METHODS: A neuropsychological (NP) test battery assessing memory, language, attention, and executive function was administered to 198 participants (age 44.5±13.7 years; 60% male). These were studied at baseline (sea level), 3,500 m (Namche Bazaar), 5,300 m (Everest Base Camp) and on return to 1,300 m (Kathmandu) (attrition rate 23...
2017: PloS One
https://www.readbyqxmd.com/read/28346014/intestinal-absorption-and-renal-reabsorption-of-calcium-throughout-postnatal-development
#7
Megan R Beggs, R Todd Alexander
Calcium is vital for many physiological functions including bone mineralization. Postnatal deposition of calcium into bone is greatest in infancy and continues through childhood and adolescence until peek mineral density is reached in early adulthood. Thereafter, bone mineral density remains static until it eventually declines in later life. A positive calcium balance, i.e. more calcium absorbed than excreted, is crucial to bone deposition during growth and thus to peek bone mineral density. Dietary calcium is absorbed from the intestine into the blood...
April 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28345212/cardiac-iodine-123-metaiodobenzylguanidine-scintigraphy-may-be-useful-to-identify-pathologic-from-physiologic-sinus-bradycardia
#8
Akihiro Sunaga, Masaharu Masuda, Masashi Fujita, Osamu Iida, Takashi Kanda, Yasuhiro Matsuda, Takakazu Morozumi, Toshiaki Mano, Masaaki Uematsu
BACKGROUND: Sinus bradycardia includes pathologic sick sinus syndrome (SSS) and physiologic bradycardia such as athletes' heart. Pacemaker implantation is indicated for patients with symptomatic SSS; however, the indication remains difficult to determine in those with mild and/or unspecific symptoms. The sympathetic tone is increased in response to reduced cardiac output in SSS, whereas excessive vagal tone has been seen in physiological bradycardia. We sought to determine if cardiac iodine-123-metaiodobenzylguanidine scintigraphy ((123) I-MIBG) was useful in differentiating pathologic from physiologic sinus bradycardia...
March 27, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28345160/increasing-skeletal-muscle-carnitine-availability-does-not-alter-the-adaptations-to-high-intensity-interval-training
#9
Christopher E Shannon, Reza Ghasemi, Paul L Greenhaff, Francis B Stephens
Increasing skeletal muscle carnitine availability alters muscle metabolism during steady-state exercise in healthy humans. We investigated whether elevating muscle carnitine, and thereby the acetyl-group buffering capacity, altered the metabolic and physiological adaptations to 24 weeks of high-intensity interval training (HIIT) at 100% maximal exercise capacity (Wattmax ). Twenty-one healthy male volunteers (age 23±2 years; BMI 24.2±1.1 kg/m(2) ) performed 2x3 minute bouts of cycling exercise at 100% Wattmax , separated by five minutes rest...
March 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28345059/health-and-disease-imprinted-in-the-time-variability-of-the-human-microbiome
#10
Jose Manuel Martí, Daniel Martínez-Martínez, Teresa Rubio, César Gracia, Manuel Peña, Amparo Latorre, Andrés Moya, Carlos P Garay
The animal microbiota (including the human microbiota) plays an important role in keeping the physiological status of the host healthy. Research seeks greater insight into whether changes in the composition and function of the microbiota are associated with disease. We analyzed published 16S rRNA and shotgun metagenomic sequencing (SMS) data pertaining to the gut microbiotas of 99 subjects monitored over time. Temporal fluctuations in the microbial composition revealed significant differences due to factors such as dietary changes, antibiotic intake, age, and disease...
March 2017: MSystems
https://www.readbyqxmd.com/read/28344903/comparison-of-consumption-behavior-and-appetite-sensations-among-patients-with-type-2-diabetes-mellitus-after-bariatric-surgery
#11
Chun Yeh, Hsien-Hao Huang, Shu-Chun Chen, Tung-Fang Chen, Kong-Han Ser, Chih-Yen Chen
BACKGROUND: The promising postsurgical weight loss and remission of type 2 diabetes (T2D) from bariatric surgery can be attributed to modified eating physiology after surgical procedures. We sought to investigate the changes in the parameters of consumption behaviors and appetite sensations induced by a mixed meal tolerance test, and to correlate these alterations with age, body mass index, C-peptide levels, and duration of T2D 1 year after bariatric surgery. METHODS: A total of 16 obese patients with T2D who underwent mini-gastric bypass (GB) and 16 patients who underwent sleeve gastrectomy (SG) were enrolled in this study and evaluated using a mixed meal tolerance test one year after surgery...
2017: PeerJ
https://www.readbyqxmd.com/read/28344894/postoperative-functional-outcomes-in-older-adults
#12
Zabecca Brinson, Victoria L Tang, Emily Finlayson
As the world's aging population grows, the surgical population is increasingly made up of older adults. Due to changes in physiologic function and increasing comorbidity burden, older adults are at increased risk of morbidity, mortality, and functional decline after surgery. In addition, decision to undergo surgery for the older adult may be based on the postoperative functional outcome rather than survival. Although few studies have evaluated an older adult's function as a postoperative outcome, surgeons are becoming increasingly aware of the importance of maintaining or regaining function in an older patient...
June 2016: Current Surgery Reports
https://www.readbyqxmd.com/read/28344440/increased-heterogeneity-of-ventricular-repolarization-in-myotonic-dystrophy-type-1-population
#13
Vincenzo Russo, Andrea Antonio Papa, Anna Rago, Paola D'Ambrosio, Giovanni Cimmino, Alberto Palladino, Luisa Politano, Gerardo Nigro
Sudden cardiac death in myotonic dystrophy type I (DM1) patients can be attributed to atrioventricular blocks as far as to the development of life-threatening arrhythmias which occur even in hearts with normal left ventricular systolic and diastolic function. Heterogeneity of ventricular repolarization is considered to provide an electrophysiological substrate for malignant arrhythmias. QTc dispersion (QTc-D), JTc dispersion (JTc-D) and transmural dispersion of repolarization (TDR) could reflect the physiological variability of regional and transmural ventricular repolarization...
October 2016: Acta Myologica: Myopathies and Cardiomyopathies: Official Journal of the Mediterranean Society of Myology
https://www.readbyqxmd.com/read/28344067/upregulation-of-orexin-hypocretin-expression-in-aged-rats-effects-on-feeding-latency-and-neurotransmission-in-the-insular-cortex
#14
Janel M Hagar, Victoria A Macht, Steven P Wilson, James R Fadel
Aging is associated with changes in numerous homeostatic functions, such as food intake, that are thought to be mediated by the hypothalamus. Orexin/hypocretin neurons of the hypothalamus regulate several physiological functions, including feeding, sleep and wakefulness. Evidence from both clinical and animal studies supports the notion that aging is associated with loss or dysregulation of the orexin system. Here, we used virus-mediated gene transfer to manipulate expression of orexin peptides in young and aged rats and examined behavioral and neurochemical correlates of food intake in these animals...
March 23, 2017: Neuroscience
https://www.readbyqxmd.com/read/28342990/telephone-adapted-mindfulness-based-stress-reduction-tmbsr-for-patients-awaiting-kidney-transplantation
#15
Cynthia R Gross, Maryanne Reilly-Spong, Taehwan Park, Ruizhi Zhao, Olga V Gurvich, Hassan N Ibrahim
BACKGROUND: Patients with progressive kidney disease experience increasing physiologic and psychosocial stressors and declining health-related quality of life (HRQOL). METHODS: We conducted a randomized, active-controlled, open-label trial to test whether a Mindfulness-based Stress Reduction (MBSR) program delivered in a novel workshop-teleconference format would reduce symptoms and improve HRQOL in patients awaiting kidney transplantation. Sixty-three transplant candidates were randomized to one of two arms: i) telephone-adapted MBSR (tMBSR, an 8-week program of meditation and yoga); or ii) a telephone-based support group (tSupport)...
March 22, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28342901/the-sympathetic-neuro-adipose-connection-and-the-control-of-body-weight
#16
REVIEW
Inês Mahú, Ana I Domingos
In recent decades, obesity has become a global public health crisis irrespective of age or gender [21]. But according to historic records, concerns over appropriate maintenance of body size have been long established. For more than to 2 millennia, the main therapeutic approach to curb excess weight has been to recommend dietary restrictions and regular exercise (Haslam, 2016). Nevertheless, more contemporary studies indicate that the employment of such approaches in the treatment of severely obese patients causes metabolic adaptions which impair their long-term success in weight management [8]...
March 22, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28342696/measurement-of-change-on-medial-and-lateral-joint-gaps-by-navigation-system-in-multi-radius-ps-tka
#17
Yeesuk Kim, Jin Kyu Lee, Kyu-Sung Chung, Doo-Yeon Lee, Choong Hyeok Choi
BACKGROUND: The purpose of this study was to evaluate the joint gap kinematics in posterior-stabilized total knee arthroplasty (PS TKA). METHODS: Between January 2010 and April 2011, 44 consecutive patients (55 knees) who underwent primary PS TKA using the navigation system were assessed. There were 37 women and 7 men with a mean age at operation of 63 years (range; 58-73 years). After fixation of all components with cement and insertion of polyethylene trial insert, medial and lateral joint gap measurements were carried out without distraction force and separately using a navigation system on each flexion angles...
March 22, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28342264/pdgfra-mrna-is-overexpressed-in-oral-cancer-patients-as-compared-to-normal-subjects-with-a-significant-trend-of-overexpression-among-tobacco-users
#18
Hui Shan Ong, Sandhya Gokavarapu, Zhen Tian, Jiang Li, Qin Xu, Cao Wei, Chen Ping Zhang
BACKGROUND: Platelet derived growth factors alpha (PDGFA) is a tyrosine kinase receptor activator which known to be amplified in the malignancies and their expression levels are correlated to tumor progression and reduced overall survival. The expression of PDGFRA is different among the tumors and normal tissues, furthermore; their expression level is site-specific. Under a physiological condition, PDGFRA and its ligand are expressed in distinct cell populations and activated in a paracrine manner...
March 25, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28341761/cardiac-safety-of-dual-anti-her2-therapy-in-the-neoadjuvant-setting-for-treatment-of-her2-positive-breast-cancer
#19
Anthony F Yu, Jasmeet C Singh, Rui Wang, Jennifer E Liu, Anne Eaton, Kevin C Oeffinger, Richard M Steingart, Clifford A Hudis, Chau T Dang
BACKGROUND: Trastuzumab and pertuzumab are approved for the neoadjuvant treatment of human epidermal growth receptor 2 (HER2)-positive breast cancer, but cardiac safety data is limited. We report the cardiac safety of dose-dense doxorubicin and cyclophosphamide (AC) followed by paclitaxel, trastuzumab, and pertuzumab (THP) in the neoadjuvant setting followed by adjuvant trastuzumab-based therapy. METHODS: Fifty-seven patients treated with neoadjuvant dose-dense AC-THP followed by adjuvant trastuzumab-based therapy between September 1, 2013, and March 1, 2015, were identified...
March 24, 2017: Oncologist
https://www.readbyqxmd.com/read/28341583/a-story-of-birth-and-death-insights-into-the-formation-and-dynamics-of-the-microglial-population
#20
REVIEW
Katharine Askew, Diego Gomez-Nicola
Microglia are the main resident immunocompetent cells of the brain with key roles in brain development, homeostasis and function. Here we briefly review our current knowledge of the homeostatic mechanisms regulating the composition and turnover of the microglial population under physiological conditions from development to ageing. A greater understanding of these mechanisms may inform understanding of how dysregulation of microglial dynamics could contribute to the pathogenesis and/or progression of neurological disorders...
March 21, 2017: Brain, Behavior, and Immunity
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