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https://www.readbyqxmd.com/read/28637176/dissociation-of-striatal-dopamine-and-tyrosine-hydroxylase-expression-from-aging-related-motor-decline-evidence-from-calorie-restriction-intervention
#1
Michael F Salvatore, Jennifer Terrebonne, Mark A Cantu, Tamara R McInnis, Katy Venable, Parker Kelley, Ella A Kasanga, Brian Latimer, Catherine L Owens, Brandon S Pruett, Yongmei Yu, Robert Luedtke, Michael J Forster, Nathalie Sumien, Donald K Ingram
The escalating increase in retirees living beyond their 8th decade brings increased prevalence of aging-related impairments, including locomotor impairment (Parkinsonism) which may affect ~50% of those reaching age 80, but has no confirmed neurobiological mechanism. Lifestyle strategies that attenuate motor decline, and its allied mechanisms, must be identified. Aging studies report little to moderate loss of striatal dopamine (DA) or tyrosine hydroxylase (TH) in nigrostriatal terminals, in contrast to ~70-80% loss associated with bradykinesia onset in Parkinson's disease...
June 20, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28630003/effects-of-mild-calorie-restriction-on-lipid-metabolism-and-inflammation-in-liver-and-adipose-tissue
#2
Chan Yoon Park, Soyoung Park, Min Soo Kim, Hye-Kyeong Kim, Sung Nim Han
Calorie restriction (CR) has been reported to improve lipid metabolism and to decrease inflammatory diseases. However, most existing CR models use 30-50% calorie reduction, which is hard to achieve in humans. We investigated the effects of mild CR on lipid metabolism and inflammatory responses. Male C57BL/6 mice were fed control diet (10% kcal fat, Control) or high fat diet (60% kcal fat, HFD) ad libitum or reduced amount of control diet to achieve 15% CR for 16 wks. Body weights, white adipose tissue weights, liver triacylglycerol levels, and serum fetuin-A levels were lower in CR than in the Control...
June 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28627208/irisin-is-weakly-associated-with-usual-physical-activity-in-young-overweight-women
#3
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/28626157/protein-restriction-does-not-affect-body-temperature-pattern-in-female-mice
#4
Goro A Kato, Hiroki Shichijo, Toshihiro Takahashi, Akio Shinohara, Tetsuo Morita, Chihiro Koshimoto
Daily torpor is a physiological adaptation in mammals and birds characterized by a controlled reduction of metabolic rate and body temperature during the resting phase of circadian rhythms. In laboratory mice, daily torpor is induced by dietary caloric restriction. However, it is not known which nutrients are related to daily torpor expression. To determine whether dietary protein is a key factor in inducing daily torpor in mice, we fed mice a protein-restricted (PR) diet that included only one-quarter of the amount of protein but the same caloric level as a control (C) diet...
June 13, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28622884/the-effect-of-caloric-restriction-on-the-forelimb-skeletal-muscle-fibers-of-the-hypertrophic-myostatin-null-mice
#5
Mohamed I Elashry, Antonios Matsakas, Sabine Wenisch, Stefan Arnhold, Ketan Patel
Skeletal muscle mass loss has a broad impact on body performance and physical activity. Muscle wasting occurs due to genetic mutation as in muscular dystrophy, age-related muscle loss (sarcopenia) as well as in chronic wasting disorders as in cancer cachexia. Food restriction reduces muscle mass underpinned by increased muscle protein break down. However the influence of dietary restriction on the morphometry and phenotype of forelimb muscles in a genetically modified myostatin null mice are not fully characterized...
June 13, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28610949/calorie-restriction-in-rodents-caveats-to-consider
#6
REVIEW
Donald K Ingram, Rafael de Cabo
The calorie restriction paradigm has provided one of the most widely used and most useful tools for investigating mechanisms of aging and longevity. By far, rodent models have been employed most often in these endeavors. Over decades of investigation, claims have been made that the paradigm produces the most robust demonstration that aging is malleable. In the current review of the rodent literature, we present arguments that question the robustness of the paradigm to increase lifespan and healthspan. Specifically, there are several questions to consider as follows: (1) At what age does CR no longer produce benefits? (2) Does CR attenuate cognitive decline? (3) Are there negative effects of CR, including effects on bone health, wound healing, and response to infection? (4) How important is schedule of feeding? (5) How long does CR need to be imposed to be effective? (6) How do genotype and gender influence CR? (7) What role does dietary composition play? Consideration of these questions produce many caveats that should guide future investigations to move the field forward...
June 10, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28610570/exploring-infant-feeding-practices-cross-sectional-surveys-of-south-western-sydney-singapore-and-ho-chi-minh-city
#7
Timothy Yong Qun Leow, Andrew Ung, Shelley Qian, Jessie Thanh Nguyen, Yvonne An, Poonam Mudgil, John Whitehall
BACKGROUND: Infant feeding practices are known to influence the child's long-term health. Studies have associated obesity and other diseases with reduced breastfeeding and early introduction of high calorie beverages (HCBs). The rising prevalence of obesity is already a problem in most developed countries, especially Australia, but cultural differences are influential. Our aim is to examine and compare infant feeding practices and educational levels of respondents through questionnaires in three culturally different sites: Campbelltown (South Western Sydney), Australia, Singapore and Ho Chi Minh City, Vietnam (HCMC)...
June 13, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28609708/anti-diabetic-activity-of-fused-ppar%C3%AE-sirt1-ligands-with-limited-body-weight-gain-by-mimicking-calorie-restriction-and-decreasing-sgk1-expression
#8
Celine Pirat, Catherine Dacquet, Veronique Leclerc, Nathalie Hennuyer, Monique Beucher-Gaudin, Ghislaine Zanirato, Anne Géant, Bart Staels, Alain Ktorza, Amaury Farce, Daniel-Henri Caignard, Pascal Berthelot, Nicolas Lebegue
A series of benzothiazol-2-one containing α-ethoxyphenylpropionic acid derivatives incorporating resveratrol or butein scaffolds were designed as fused full PPARγ agonist ligands and SIRT1-activating compounds for the treatment of type 2 diabetes (T2D) and its complications. Compound 14d displayed the best in vitro pharmacological profile with full PPARγ agonist activity (Emax = 98%, EC50 = 200 nM), SIRT1 enzymatic activation (+128%) and SGK1 expression inhibition (- 57%) which is known to limit side effects as fluid retention and body-weight gain...
June 10, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28604251/the-effect-of-a-vegetarian-vs-conventional-hypocaloric-diabetic-diet-on-thigh-adipose-tissue-distribution-in-subjects-with-type-2-diabetes-a-randomized-study
#9
Hana Kahleova, Marta Klementova, Vit Herynek, Antonin Skoch, Stepan Herynek, Martin Hill, Andrea Mari, Terezie Pelikanova
OBJECTIVE: The aim of our study was to compare the effects of a vegetarian and a conventional diet on thigh adipose tissue distribution in subjects with type 2 diabetes (T2D). METHODS: Seventy-four subjects with T2D were randomly assigned to either follow a vegetarian diet (V, n = 37) or a control group who followed an isocaloric conventional anti-diabetic diet (C, n = 37). Both diets were calorie restricted (-500 kcal/day). To measure insulin sensitivity, the hyperinsulinemic (1 mU...
June 10, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28600557/regulatory-functions-of-cellular-energy-sensor-snf1-related-kinase1-for-leaf-senescence-delay-through-ethylene-insensitive3-repression
#10
Geun-Don Kim, Young-Hee Cho, Sang-Dong Yoo
Aging of living organisms is governed by intrinsic developmental programs, of which progression is often under the regulation of their cellular energy status. For example, calorie restriction is known to slow down aging of heterotrophic organisms from yeasts to mammals. In autotrophic plants cellular energy deprivation by perturbation of photosynthesis or sugar metabolism is also shown to induce senescence delay. However, the underlying molecular and biochemical mechanisms remain elusive. Our plant cell-based functional and biochemical assays have demonstrated that SNF1-RELATED KINASE1 (SnRK1) directly interacts, phosphorylates, and destabilizes the key transcription factor ETHYLENE INSENSITIVE3 (EIN3) in senescence-promoting hormone ethylene signaling...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28596784/indy-a-new-link-to-metabolic-regulation-in-animals-and-humans
#11
REVIEW
Blanka Rogina
The Indy (I'm Not Dead Yet) gene encodes the fly homolog of the mammalian SLC13A5 citrate transporter. Reduced expression of the Indy gene in flies and worms extends their longevity. INDY is expressed in the plasma membrane of metabolically active tissues. Decreased expression of Indy in worms, flies, mice, and rats alters metabolism in a manner similar to calorie restriction. Reducing INDY activity prevents weight gain in flies, worms, and mice, and counteracts the negative effects of age or a high fat diet on metabolism and insulin sensitivity...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28595318/mediterranean-diet-and-inflammaging-within-the-hormesis-paradigm
#12
Morena Martucci, Rita Ostan, Fiammetta Biondi, Elena Bellavista, Cristina Fabbri, Claudia Bertarelli, Stefano Salvioli, Miriam Capri, Claudio Franceschi, Aurelia Santoro
A coherent set of epidemiological data shows that the Mediterranean diet has beneficial effects capable of preventing a variety of age-related diseases in which low-grade, chronic inflammation/inflammaging plays a major role, but the underpinning mechanism(s) is/are still unclear. It is argued here that the Mediterranean diet can be conceptualized as a form of chronic hormetic stress, similar to what has been proposed regarding calorie restriction, the most thoroughly studied nutritional intervention. Data on the presence in key Mediterranean foods of a variety of compounds capable of exerting hormetic effects are summarized, and the mechanistic role of the nuclear factor erythroid 2 pathway is highlighted...
June 8, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28593722/macronutrient-intake-associated-with-weight-gain-in-adolescent-girls-with-anorexia-nervosa
#13
Charumathi Baskaran, Traci L Carson, Karen J Campoverde Reyes, Kendra R Becker, Meghan J Slattery, Shreya Tulsiani, Kamryn T Eddy, Ellen J Anderson, Jane L Hubbard, Madhusmita Misra, Anne Klibanski
OBJECTIVE: Adolescents and women with anorexia nervosa (AN) are known to severely restrict total calorie and fat intake. However, data are limited regarding specific macronutrient intake associated with weight gain in AN. OBJECTIVE: To prospectively investigate dietary macronutrient composition associated with weight gain in adolescent girls with AN. METHOD: A prospective naturalistic study of 90 girls 12-18 years old; 45 with AN and 45 healthy normal-weight-controls over a 6-12-month period...
June 7, 2017: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/28588304/plasma-fgf21-levels-in-obese-patients-undergoing-energy-restricted-diets-or-bariatric-surgery-a-marker-of-metabolic-stress
#14
A B Crujeiras, D Gomez-Arbelaez, M A Zulet, M C Carreira, I Sajoux, D de Luis, A I Castro, J Baltar, I Baamonde, A Sueiro, M Macias-Gonzalez, D Bellido, F J Tinahones, J A Martinez, F F Casanueva
CONTEXT: Fibroblast growth factor 21 (FGF21) has been suggested to be an endocrine signal of nutritional status and an active regulator of metabolism. However, there is no agreement on the effect of weight loss therapies on circulating levels of FGF21 in humans. OBJECTIVE: To assess FGF21 circulating levels in adiposity excess and after different weight loss strategies prescribed in five different groups from 4 independent centers. SUBJECTS AND METHODS: Body composition, ketosis, insulin sensitivity and FGF21 were evaluated in 181 excess body weight and 14 normal-weight subjects...
June 7, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28588097/high-intensity-interval-training-and-calorie-restriction-promote-remodeling-of-glucose-and-lipid-metabolism-in-diet-induced-obesity
#15
Rachel A H Davis, Jacob E Halbrooks, Emily Watkins, Gordon Fisher, Gary R Hunter, Tim R Nagy, Eric P Plaisance
Calorie restriction (CR) decreases adiposity, but the magnitude and defense of weight loss is less than predicted due to reductions in total daily energy expenditure (TEE). The purpose of the current investigation was to determine if high-intensity interval training (HIIT) would increase markers of sympathetic activation in white adipose tissue (WAT) and rescue CR-mediated reductions in EE to a greater extent than moderate-intensity aerobic exercise training (MIT). Thirty-two 5-wk old male C57BL/6J mice were placed on ad libitum HFD for 11 weeks followed by randomization to one of four groups (n = 8 per group) for an additional 15 weeks: 1) CON (remain on HFD); 2) CR (25% lower energy intake); 3) CR+HIIT (25% energy deficit created by 12...
June 6, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28575190/the-effects-of-graded-levels-of-calorie-restriction-x-transcriptomic-responses-of-epididymal-adipose-tissue
#16
Davina Derous, Sharon E Mitchell, Cara L Green, Yingchun Wang, Jing Dong J Han, Luonan Chen, Daniel E L Promislow, David Lusseau, Alex Douglas, John R Speakman
Calorie restriction (CR) leads to a remarkable decrease in adipose tissue mass and increases longevity in many taxa. Since the discovery of leptin, the secretory abilities of adipose tissue have gained prominence in the responses to CR. We quantified transcripts of epididymal white adipose tissue of male C57BL/6 mice exposed to graded levels of CR (0% to 40% CR) for three months. The numbers of differentially expressed genes (DEGs) involved in NF-κB, HIF1-α and p53 signalling increased with increasing levels of CR...
May 27, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28574481/leucine-supplementation-differently-modulates-branched-chain-amino-acid-catabolism-mitochondrial-function-and-metabolic-profiles-at-the-different-stage-of-insulin-resistance-in-rats-on-high-fat-diet
#17
Rui Liu, Hui Li, Wenjuan Fan, Qiu Jin, Tingting Chao, Yuanjue Wu, Junmei Huang, Liping Hao, Xuefeng Yang
The available findings concerning the association between branched-chain amino acids (BCAAs)-particularly leucine-and insulin resistance are conflicting. BCAAs have been proposed to elicit different or even opposite effects, depending on the prevalence of catabolic and anabolic states. We tested the hypothesis that leucine supplementation may exert different effects at different stages of insulin resistance, to provide mechanistic insights into the role of leucine in the progression of insulin resistance. Male Sprague-Dawley rats were fed a normal chow diet, high-fat diet (HFD), HFD supplemented with 1...
June 2, 2017: Nutrients
https://www.readbyqxmd.com/read/28572072/the-critical-role-of-cognitive-based-trait-differences-in-transcranial-direct-current-stimulation-tdcs-suppression-of-food-craving-and-eating-in-frank-obesity
#18
Mary Katherine Ray, Maria D Sylvester, Lauren Osborn, Joel Helms, Bulent Turan, Emilee E Burgess, Mary M Boggiano
Obesity remains a major public health concern and novel treatments are needed. Transcranial direct current stimulation (tDCS) is a neuromodulation technique shown to reduce food craving and consumption, especially when targeting the dorsolateral prefrontal cortex (DLPFC) with a right anode/left cathode electrode montage. Despite the implications to treat frank (non-bingeeating) obesity, no study has tested the right anode/left cathode montage in this population. Additionally, most tDCS appetite studies have not controlled for differences in traits under DLPFC control that may influence how well one responds to tDCS...
May 29, 2017: Appetite
https://www.readbyqxmd.com/read/28571712/effects-of-weight-loss-on-adipose-visceral-and-subcutaneous-tissue-in-overweight-adults
#19
Cláudia Porto Sabino Pinho, Alcides da Silva Diniz, Ilma Kruze Grande de Arruda, Ana Paula Dornelas Leão Leite, Isa Galvão Rodrigues
BACKGROUND & AIMS: Weight loss is an important strategy for mitigating the complications of obesity. However, weight reduction does not provide detailed information on relative changes in bodily behaviors and in abdominal fat deposits (adipose visceral tissue (AVT) and adipose subcutaneous tissue (AST)). The aim of this study was to evaluate the effect of weight loss based on calorie restriction on AVT and AST in overweight individuals (1); to verify the metabolic benefits resulting from AVT reduction (2); and to the analyze the influence of covariates in AVT and AST reduction (3)...
May 19, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28557510/endorsing-help-for-others-that-you-oppose-for-yourself-mind-perception-alters-the-perceived-effectiveness-of-paternalism
#20
Juliana Schroeder, Adam Waytz, Nicholas Epley
How people choose to help each other can be just as important as how much people help. Help can come through relatively paternalistic or agentic aid. Paternalistic aid, such as banning certain foods to encourage weight loss or donating food to alleviate poverty, restricts recipients' choices compared with agentic aid, such as providing calorie counts or donating cash. Nine experiments demonstrate that how people choose to help depends partly on their beliefs about the recipient's mental capacities. People perceive paternalistic aid to be more effective for those who seem less mentally capable (Experiments 1 and 2), and people therefore give more paternalistically when others are described as relatively incompetent (Experiment 3)...
May 29, 2017: Journal of Experimental Psychology. General
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