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https://www.readbyqxmd.com/read/28418519/association-of-diet-with-skin-histological-features-in-uv-b-exposed-mice
#1
Tapan K Bhattacharyya, Yvonne Hsia, David M Weeks, Tatiana K Dixon, Jessica Lepe, J Regan Thomas
Importance: Long-term exposure to solar radiation produces deleterious photoaging of the skin. It is not known if diet can influence skin photoaging. Objectives: To study the influence of a calorie-restricted diet and an obesity diet in mice exposed to long-term UV-B irradiation to assess if there is an association between diet and histopathological response to UV-B irradiation. Design, Setting, and Participants: In this animal model study in an academic setting, the dorsal skin of SKH1 hairless mice receiving normal, calorie-restricted, and obesity diets was exposed to UV-B irradiation 3 times a week for 10 weeks and were compared with corresponding controls...
April 13, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/28414020/modifying-alcohol-consumption-to-reduce-obesity-macro-development-and-feasibility-trial-of-a-complex-community-based-intervention-for-men
#2
Iain K Crombie, Kathryn B Cunningham, Linda Irvine, Brian Williams, Falko F Sniehotta, John Norrie, Ambrose Melson, Claire Jones, Andrew Briggs, Peter M Rice, Marcus Achison, Andrew McKenzie, Elena Dimova, Peter W Slane
BACKGROUND: Obese men who consume alcohol are at a greatly increased risk of liver disease; those who drink > 14 units of alcohol per week have a 19-fold increased risk of dying from liver disease. OBJECTIVES: To develop an intervention to reduce alcohol consumption in obese men and to assess the feasibility of a randomised controlled trial (RCT) to investigate its effectiveness. DESIGN OF THE INTERVENTION: The intervention was developed using formative research, public involvement and behaviour change theory...
April 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28412652/during-yeast-chronological-aging-resveratrol-supplementation-results-in-a-short-lived-phenotype-sir2-dependent
#3
Ivan Orlandi, Giulia Stamerra, Maurizio Strippoli, Marina Vai
Resveratrol (RSV) is a naturally occurring polyphenolic compound endowed with interesting biological properties/functions amongst which are its activity as an antioxidant and as Sirtuin activating compound towards SIRT1 in mammals. Sirtuins comprise a family of NAD(+)-dependent protein deacetylases that are involved in many physiological and pathological processes including aging and age-related diseases. These enzymes are conserved across species and SIRT1 is the closest mammalian orthologue of Sir2 of Saccharomyces cerevisiae...
April 9, 2017: Redox Biology
https://www.readbyqxmd.com/read/28412520/nutrition-modulation-of-human-aging-the-calorie-restriction-paradigm
#4
Sai Krupa Das, Priya Balasubramanian, Yasoma K Weerasekara
Globally, the aging population is growing rapidly, creating an urgent need to attenuate age-related health conditions, including metabolic disease and disability. A promising strategy for healthy aging based on consistently positive results from studies with a variety of species, including non-human primates (NHP), is calorie restriction (CR), or the restriction of energy intake while maintaining intake of essential nutrients. The burgeoning evidence for this approach in humans is reviewed and the major study to date to address this question, CALERIE (Comprehensive Assessment of the Long-term Effects of Reducing Intake of Energy), is described...
April 12, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28407662/effects-of-a-one-week-fasting-therapy-in-patients-with-type-2-diabetes-mellitus-and-metabolic-syndrome-a-randomized-controlled-explorative-study
#5
Chenying Li, Badri Sadraie, Nico Steckhan, Christian Kessler, Rainer Stange, Michael Jeitler, Andreas Michalsen
There is increasing experimental evidence for beneficial effects of calorie restriction and intermittent fasting in type 2 diabetes mellitus (T2DM). In humans, prolonged fasting is established as a health-promoting complementary treatment in Europe and claimed to improve metabolism by a complex hormetic response. We aimed to investigate effects of a one-week fasting period compared to usual care in T2DM by means of a pilot trial. Patients with manifest T2DM medically treated with oral hypoglycemic agents and/or insulin were randomly assigned to a 7-day fasting program followed by dietary advice or to usual care and dietary advice only...
April 13, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28399265/survival-of-the-house-fly-diptera-muscidae-on-truvia-and-other-sweeteners
#6
Michael L Fisher, Fallon E Fowler, Steven S Denning, David W Watson
The house fly, Musca domestica L. (Diptera: Muscidae), is a disease vector of mechanically transmitted pathogens including bacteria, viruses, and protozoans. Opportunities for pathogen transmission can increase as fly longevity increases. Dietary preferences play an important role in insect longevity; therefore, we investigated house fly preferences, sucrose availability, and caloric constraints on house fly longevity. Experimental goals were: 1) to test the effects of calorie restriction on survival of house flies by manipulating concentrations of erythritol (low caloric content) and sucrose (high caloric content), and comparing commercial sweeteners of differing calorie content, 2) to identify house fly preferences for either erythritol or sucrose, and 3) to evaluate the insecticidal activity or toxicity of erythritol on house flies...
April 5, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28398950/a-ketone-ester-drink-increases-postexercise-muscle-glycogen-synthesis-in-humans
#7
David A Holdsworth, Peter J Cox, Tom Kirk, Huw Stradling, Samuel G Impey, Kieran Clarke
INTRODUCTION: Physical endurance can be limited by muscle glycogen stores, in that glycogen depletion markedly reduces external work. During carbohydrate restriction, the liver synthesises the ketone bodies, D-β-hydroxybutyrate and acetoacetate, from fatty acids. In animals and in the presence of glucose, D-β-hydroxybutyrate promotes insulin secretion and increases glycogen synthesis. Here we determined whether a dietary ketone ester, combined with plentiful glucose, can increase post-exercise glycogen synthesis in human skeletal muscle...
April 10, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28398464/caloric-restriction-and-healthy-life-span-frail-phenotype-of-nonhuman-primates-in-the-wisconsin-national-primate-research-center-caloric-restriction-study
#8
Yosuke Yamada, Joseph W Kemnitz, Richard Weindruch, Rozalyn M Anderson, Dale A Schoeller, Ricki J Colman
Calorie restriction without malnutrition increases longevity and delays the onset of age-associated disorders in multiple species. Recently, greater emphasis has been placed on healthy life span and preventing frailty than on longevity. Here, we show the beneficial effect of long-term calorie restriction on frailty in later life in a nonhuman primate. Frail phenotypes were evaluated using metabolic and physical activity data and defined using the Fried index. Shrinking was defined as unintentional weight loss of greater than 5% of body weight...
April 8, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28394360/differential-sympathetic-outflow-to-adipose-depots-is-required-for-visceral-fat-loss-in-response-to-calorie-restriction
#9
L M Sipe, C Yang, J Ephrem, E Garren, J Hirsh, C D Deppmann
The sympathetic nervous system (SNS) regulates energy homeostasis in part by governing fatty acid liberation from adipose tissue. We first examined whether SNS activity toward discrete adipose depots changes in response to a weight loss diet in mice. We found that SNS activity toward each adipose depot is unique in timing, pattern of activation, and habituation with the most dramatic contrast between visceral and subcutaneous adipose depots. Sympathetic drive toward visceral epididymal adipose is more than doubled early in weight loss and then suppressed later in the diet when weight loss plateaued...
April 10, 2017: Nutrition & Diabetes
https://www.readbyqxmd.com/read/28392935/measurement-of-hepatic-insulin-sensitivity-early-after-the-bypass-of-the-proximal-small-bowel-in-humans
#10
A D Miras, R Herring, A Vusirikala, F Shojaee-Moradi, N C Jackson, S Chandaria, S N Jackson, A P Goldstone, N Hakim, A G Patel, A M Umpleby, C W Le Roux
OBJECTIVE: Unlike gastric banding or sleeve gastrectomy procedures, intestinal bypass procedures, Roux-en-Y gastric bypass in particular, lead to rapid improvements in glycaemia early after surgery. The bypass of the proximal small bowel may have weight loss and even caloric restriction-independent glucose-lowering properties on hepatic insulin sensitivity. In this first human mechanistic study, we examined this hypothesis by investigating the early effects of the duodeno-jejunal bypass liner (DJBL; GI Dynamics, USA) on the hepatic insulin sensitivity by using the gold standard euglycaemic hyperinsulinaemic clamp methodology...
March 2017: Obesity Science & Practice
https://www.readbyqxmd.com/read/28388826/sulfur-restriction-extends-fission-yeast-chronological-lifespan-through-ecl1-family-genes-by-downregulation-of-ribosome
#11
Hokuto Ohtsuka, Masahiro Takinami, Takafumi Shimasaki, Takahide Hibi, Hiroshi Murakami, Hirofumi Aiba
Nutritional restrictions such as calorie restrictions are known to increase the lifespan of various organisms. Here we found that a restriction of sulfur extended the chronological lifespan (CLS) of the fission yeast Schizosaccharomyces pombe. The restriction decreased cellular size, RNA content, and ribosomal proteins and increased sporulation rate. These responses depended on Ecl1 family genes, the overexpression of which results in the extension of CLS. We also showed that the Zip1 transcription factor results in the sulfur restriction-dependent expression of the ecl1(+) gene...
April 7, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28388294/a-randomized-double-blind-placebo-controlled-trial-to-determine-the-effectiveness-and-safety-of-a-thermogenic-supplement-in-addition-to-an-energy-restricted-diet-in-apparently-healthy-females
#12
Kristina L Kendall, Parker N Hyde, Ciaran M Fairman, Kaitlyn M Hollaway, Petey W Mumford, Cody T Haun, Brooks Mobley, Wesley C Kephart, Aaron C Tribby, Dylan Kimber, Jordan R Moon, Darren T Beck, Michael D Roberts, Kaelin C Young
The increasing interest in weight loss has seen a concurrent rise in the supplemental use of thermogenics to aid weight loss efforts. To date, the effectiveness and safety of supplemental proprietary blend thermogenics, in conjunction with high-protein energy-restricted diets have not been thoroughly evaluated. The purpose of this study was to investigate the efficacy of a low-calorie, high-protein diet with and without the concomitant use of a thermogenic supplement on body weight and body composition in apparently healthy females...
April 7, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28386383/genome-wide-hepatic-dna-methylation-changes-in-high-fat-diet-induced-obese-mice
#13
AhRam Yoon, Stephanie A Tammen, Soyoung Park, Sung Nim Han, Sang-Woon Choi
BACKGROUND/OBJECTIVES: A high-fat diet (HFD) induces obesity, which is a major risk factor for cardiovascular disease and cancer, while a calorie-restricted diet can extend life span by reducing the risk of these diseases. It is known that health effects of diet are partially conveyed through epigenetic mechanism including DNA methylation. In this study, we investigated the genome-wide hepatic DNA methylation to identify the epigenetic effects of HFD-induced obesity. MATERIALS AND METHODS: Seven-week-old male C57BL/6 mice were fed control diet (CD), calorie-restricted control diet (CRCD), or HFD for 16 weeks (after one week of acclimation to the control diet)...
April 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/28382218/a-lifestyle-intervention-program-for-successfully-addressing-major-cardiometabolic-risks-in-persons-with-sci-a-three-subject-case-series
#14
Gregory E Bigford, Armando J Mendez, Luisa Betancourt, Patricia Burns-Drecq, Deborah Backus, Mark S Nash
INTRODUCTION: This study is a prospective case series analyzing the effects of a comprehensive lifestyle intervention program in three patients with chronic paraplegia having major risks for the cardiometabolic syndrome (CMS). CASE PRESENTATION: Individuals underwent an intense 6-month program of circuit resistance exercise, nutrition using a Mediterranean diet and behavioral support, followed by a 6-month extension (maintenance) phase involving minimal support...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28380383/using-dna-methylation-profiling-to-evaluate-biological-age-and-longevity-interventions
#15
Daniel A Petkovich, Dmitriy I Podolskiy, Alexei V Lobanov, Sang-Goo Lee, Richard A Miller, Vadim N Gladyshev
The DNA methylation levels of certain CpG sites are thought to reflect the pace of human aging. Here, we developed a robust predictor of mouse biological age based on 90 CpG sites derived from partial blood DNA methylation profiles. The resulting clock correctly determines the age of mouse cohorts, detects the longevity effects of calorie restriction and gene knockouts, and reports rejuvenation of fibroblast-derived iPSCs. The data show that mammalian DNA methylomes are characterized by CpG sites that may represent the organism's biological age...
April 4, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28376661/succination-of-protein-disulfide-isomerase-links-mitochondrial-stress-to-endoplasmic-reticulum-stress-in-the-adipocyte-during-diabetes
#16
Allison M Manuel, Michael D Walla, Adam Faccenda, Stephanie L Martin, Ross M Tanis, Gerardo G Piroli, Julie Adam, Boris Kantor, Bulent Mutus, Danyelle M Townsend, Norma Frizzell
AIMS: Protein succination by fumarate increases in the adipose tissue of diabetic mice and in adipocytes matured in high glucose as a result of glucotoxicity driven mitochondrial stress. The endoplasmic reticulum (ER) oxidoreductase protein disulfide isomerase (PDI) is succinated in adipocytes matured in high glucose, and in this study we investigated if succination would alter PDI oxidoreductase activity, directly linking mitochondrial stress and ER stress. RESULTS: Protein succination and the ER stress marker CHOP are diminished following pharmaceutical targeting of mitochondrial stress with the chemical uncoupler niclosamide in adipocytes matured in high glucose concentrations...
April 4, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28373962/the-influence-of-different-calorie-restriction-protocols-on-serum-pro-inflammatory-cytokines-adipokines-and-igf-i-levels-in-female-c57bl6-mice-short-term-and-long-term-diet-effects
#17
Soner Dogan, Amitabha Ray, Margot P Cleary
Calorie restriction (CR) is an effective intervention to prevent chronic diseases including cancer. Although many factors, i.e., sex hormones, IGF-I and mTOR have been studied in response to CR, the molecular mechanisms of CR remain to be identified. Our objective was to determine the short and long-term effects of different CR protocols on pro-inflammatory cytokines. Our hypothesis was that Intermittent CR (ICR) would result in greater inhibition of pro-inflammatory serum cytokines compared to Chronic CR (CCR) as we previously found ICR to be more protective in the prevention of mammary tumor development...
June 2017: Meta Gene
https://www.readbyqxmd.com/read/28373182/energy-balance-modulation-impacts-epigenetic-reprogramming-er%C3%AE-and-er%C3%AE-expression-and-mammary-tumor-development-in-mmtv-neu-transgenic-mice
#18
Emily L Rossi, Sarah M Dunlap, Laura W Bowers, Subreen A Khatib, Steven S Doerstling, Laura A Smith, Manu A Sharma, Darcy Holley, Powel H Brown, Marcos R Estecio, Donna F Kusewitt, Linda A deGraffenried, Scott J Bultman, Stephen D Hursting
The association between obesity and breast cancer risk and prognosis is well established in ER-positive disease but less clear in HER2-positive disease. Here, we report preclinical evidence suggesting weight maintenance through calorie restriction may limit risk of HER2-positive breast cancer. In female MMTV-HER2/neu transgenic mice, we found that ERα and ERβ expression, mammary tumorigenesis and survival are energy balance-dependent in association with epigenetic reprogramming. Mice were randomized to receive a calorie restriction (CR), overweight (OW)-inducing, or diet-induced obesity (DIO) regimen (n = 27/group)...
April 3, 2017: Cancer Research
https://www.readbyqxmd.com/read/28371201/ketone-bodies-mimic-the-life-span-extending-properties-of-caloric-restriction
#19
REVIEW
Richard L Veech, Patrick C Bradshaw, Kieran Clarke, William Curtis, Robert Pawlosky, M Todd King
The extension of life span by caloric restriction has been studied across species from yeast and Caenorhabditis elegans to primates. No generally accepted theory has been proposed to explain these observations. Here, we propose that the life span extension produced by caloric restriction can be duplicated by the metabolic changes induced by ketosis. From nematodes to mice, extension of life span results from decreased signaling through the insulin/insulin-like growth factor receptor signaling (IIS) pathway...
April 3, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28359648/tachykinin-neurokinin-3-receptor-antagonists-a-new-treatment-for-cardiovascular-disease
#20
C Mary Schooling
Great progress has been made in reducing cardiovascular mortality over the past 50 years. Nevertheless, prevalence is rising in some settings and remains higher in men than in women, even with the same level of established risk factors. To gain new insights, researchers are now considering cardiovascular disease in relation to the well known evolutionary biology model of growth and reproduction trading off against longevity, with trials of calorie restriction underway. However, calorie restriction has not been as successful as expected in primates and it is increasingly realised that effects on the reproductive axis might also be important...
March 27, 2017: Lancet
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