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Intermittant fasting

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https://www.readbyqxmd.com/read/29345287/intermittent-calorie-restriction-enhances-epithelial-mesenchymal-transition-through-the-alteration-of-energy-metabolism-in-a-mouse-tumor-model
#1
Osamu Kusuoka, Rina Fujiwara-Tani, Chie Nakashima, Kiyomu Fujii, Hitoshi Ohmori, Takuya Mori, Shingo Kishi, Yoshihiro Miyagawa, Kei Goto, Isao Kawahara, Hiroki Kuniyasu
The effect of intermittent calorie restriction (ICR) on cancer is controversial. In this study, we examined the effects of ICR and food content in syngeneic BALB/c mice injected with CT26 mouse colon cancer cells. Mice were subjected to 24-h fasting once a week for 4 weeks, and then provided with a control, high-calorie, or trans fatty acid-rich diet. While ICR resulted in increases in tumor weights, metastasis and in the number of cancer stem cells (CSCs) in the tumors or blood of mice fed the control and high-fat diets, it had no effect on body weight after 4 weeks...
February 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29327228/postoperative-intermittent-fasting-prevents-hippocampal-oxidative-stress-and-memory-deficits-in-a-rat-model-of-chronic-cerebral-hypoperfusion
#2
Yuan Hu, Miao Zhang, Yunyun Chen, Ying Yang, Jun-Jian Zhang
PURPOSE: Whether intermittent fasting (IF) treatment after stroke can prevent its long-term detrimental effects remains unknown. Here, we investigate the effects of postoperative IF on cognitive deficits and its underlying mechanisms in a permanent two-vessel occlusion (2VO) vascular dementia rat model. METHODS: Rats were subjected to either IF or ad libitum feeding 1 week after 2VO surgery. The cognition of rats was assessed using the novel object recognition (NOR) task and Morris water maze (MWM) 8 weeks after surgery...
January 11, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29325335/-association-between-serum-adipocyte-fatty-acid-binding-protein-level-and-insulin-resistance-in-patients-with-osas
#3
Y B Wang, X F Li, R Chen, J H Shen, Y H Zhang
Objective: To investigate the association between serum adipocyte fatty acid binding protein (A-FABP) level and insulin resistance in patients with obstructive sleep apnea syndromes (OSAS). Methods: Eighty patients with snoring were monitored by overnight polysomnography (PSG) from September 2015 to July 2017, and there were 59 males and 21 females, aged from 22 to 77 years old (mean age 47±14 years old). Based on the apnea-hypopnea index (AHI), these patients were divided into three groups: primary snoring group (AHI<5/h, n=19), mild-moderate OSAS groups (5/h≤AHI≤30/h, n=23) and severe OSAS groups (AHI>30/h, n=38)...
December 26, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29321682/intermittent-metabolic-switching-neuroplasticity-and-brain-health
#4
REVIEW
Mark P Mattson, Keelin Moehl, Nathaniel Ghena, Maggie Schmaedick, Aiwu Cheng
During evolution, individuals whose brains and bodies functioned well in a fasted state were successful in acquiring food, enabling their survival and reproduction. With fasting and extended exercise, liver glycogen stores are depleted and ketones are produced from adipose-cell-derived fatty acids. This metabolic switch in cellular fuel source is accompanied by cellular and molecular adaptations of neural networks in the brain that enhance their functionality and bolster their resistance to stress, injury and disease...
January 11, 2018: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/29321525/exploring-the-consequences-of-social-defeat-stress-and-intermittent-ethanol-drinking-on-dopamine-dynamics-in-the-rat-nucleus-accumbens
#5
Alex L Deal, Joanne K Konstantopoulos, Jeff L Weiner, Evgeny A Budygin
The current study aimed to explore how presynaptic dopamine (DA) function is altered following brief stress episodes and chronic ethanol self-administration and whether these neuroadaptations modify the acute effects of ethanol on DA dynamics. We used fast-scan cyclic voltammetry to evaluate changes in DA release and uptake parameters in rat nucleus accumbens brain slices by analyzing DA transients evoked through single pulse electrical stimulation. Adult male rats were divided into four groups: ethanol-naïve or ethanol drinking (six week intermittent two-bottle choice) and stressed (mild social defeat) or nonstressed...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29315892/effects-of-fasted-vs-fed-state-exercise-on-performance-and-post-exercise-metabolism-a-systematic-review-meta-analysis
#6
REVIEW
Tom P Aird, Robert W Davies, Brian P Carson
The effects of nutrition on exercise metabolism and performance remains an important topic among sports scientists, clinical, and athletic populations. Recently, fasted exercise has garnered interest as a beneficial stimulus which induces superior metabolic adaptations to fed exercise in key peripheral tissues. Conversely, pre-exercise feeding augments exercise performance compared with fasting conditions. Given these seemingly divergent effects on performance and metabolism, an appraisal of the literature is warranted...
January 6, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29300979/high-intensity-exercise-decreases-ip6k1-muscle-content-improves-insulin-sensitivity-si2-in-glucose-intolerant-individuals
#7
Jane Naufahu, Bradley Elliott, Anatoliy Markiv, Petra Dunning-Foreman, Maggie McGrady, David Howard, Peter Watt, Richard W A Mackenzie
Context: Insulin resistance in skeletal muscle contributes to whole body hyperglycaemia and the secondary complications associated with type 2 diabetes. Inositol hexakisphosphate kinase-1 (IP6K1) may inhibit insulin-stimulated glucose transport in this tissue type. Objective: Muscle and plasma IP6K1 were correlated with two-compartment models of glucose control in insulin-resistant hyperinsulimic individuals. Muscle IP6K1 was also compared following two different exercise trials...
December 29, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29277679/intermittent-fasting-promotes-prolonged-associative-interactions-during-synaptic-tagging-capture-by-altering-the-metaplastic-properties-of-the-ca1-hippocampal-neurons
#8
Ananya Dasgupta, Joonki Kim, Anoop Manakkadan, Thiruma V Arumugam, Sreedharan Sajikumar
Metaplasticity is the inherent property of a neuron or neuronal population to undergo activity-dependent changes in neural function that modulate subsequent synaptic plasticity. Here we studied the effect of intermittent fasting (IF) in governing the interactions of associative plasticity mechanisms in the pyramidal neurons of rat hippocampal area CA1. Late long-term potentiation and its associative mechanisms such as synaptic tagging and capture at an interval of 120 min were evaluated in four groups of animals, AL (Ad libitum), IF12 (daily IF for 12 h), IF16 (daily IF for 16 h) and EOD (every other day IF for 24 h)...
December 19, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29275920/the-effect-of-intermittent-fasting-on-blood-pressure-variability-in-patients-with-newly-diagnosed-hypertension-or-prehypertension
#9
Yunus Erdem, Gülsüm Özkan, Şükrü Ulusoy, Mustafa Arıcı, Ülver Derici, Şule Şengül, Şükrü Sindel, Şehsuvar Ertürk
Intermittent fasting is a phenomenon which can be observed in most humans. The effect of intermittent fasting on blood pressure variability (BPV) has not previously been investigated. The purpose of this study was to assess the effect of fasting on blood pressure (BP) (with office, home, central, and ambulatory blood pressure monitoring [ABPM]) and on BPV. Sixty individuals were included in the study. Office, home, ABPM, and central BP measurements were performed before and during intermittent fasting. Standard deviation and coefficient variation were used for office and home BPV measurement, while the smoothness index was used to calculate ABPM variability...
December 6, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/29247296/decrease-of-perforin-positive-cd3-%C3%AE-%C3%AE-t-cells-in-patients-with-obstructive-sleep-disordered-breathing
#10
Richard Staats, Raquel Rodrigues, André Barros, Leonor Bacelar-Nicolau, Margarida Aguiar, Dina Fernandes, Susana Moreira, André Simões, Bruno Silva-Santos, João Valença Rodrigues, Cristina Barbara, António Bugalho de Almeida, Luis Ferreira Moita
INTRODUCTION: Sleep related breathing disorders (SRBD) cause sleep fragmentation, intermittent hypoxia or a combination of both leading to homeostasis perturbations, including in the immune system. We investigated whether SRBD patients with or without intermittent hypoxia show substantial differences in perforin and granzyme-B positive peripheral blood lymphocytes. METHODS: A total of 87 subjects were included and distributed as follows: 24 controls (C), 19 patients with respiratory effort related arousals due to increased upper airway resistance (UAR) without hypoxic events, 24 obese patients with obstructive sleep apnea (OSA) (oOSA), and 20 without obesity (noOSA)...
December 15, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29238290/intermittent-fasting-protects-against-alzheimer-s-disease-possible-through-restoring-aquaporin-4-polarity
#11
Jingzhu Zhang, Zhipeng Zhan, Xinhui Li, Aiping Xing, Congmin Jiang, Yanqiu Chen, Wanying Shi, Li An
The impairment of amyloid-β (Aβ) clearance in the brain plays a causative role in Alzheimer's disease (AD). Polarity distribution of aquaporin-4 (AQP4) is important to remove Aβ from brain. AQP4 polarity can be influenced by the ratio of two AQP4 isoforms M1 and M23 (AQP4-M1/M23), however, it is unknown whether the ratio of AQP4-M1/M23 changes in AD. Histone deacetylase 3 has been reported to be significantly increased in AD brain. Moreover, evidence indicated that microRNA-130a (miR-130a) possibly mediates the regulation of histone deacetylase 3 on AQP4-M1/M23 ratio by repressing the transcriptional activity of AQP4-M1 in AD...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29207999/corticosteroid-plus-%C3%AE-2-agonist-in-a-single-inhaler-as-reliever-therapy-in-intermittent-and-mild-asthma-a-proof-of-concept-systematic-review-and-meta-analysis
#12
REVIEW
Gang Wang, Xin Zhang, Hong Ping Zhang, Lei Wang, De Ying Kang, Peter J Barnes, Gang Wang
BACKGROUND: Current guidelines recommend a single inhaler maintenance and reliever therapy (SMART) regimen for moderate to severe asthma. However, evidence for the inhaled corticosteroid plus fast-onset-acting β2-agonist (ICS/FABA) as reliever therapy in management of intermittent and mild asthma patients is lacking. OBJECTIVE: To systematically explore efficacy and safety of the proof-of-concept of the ICS plus FABA regimen in a single inhaler as reliever therapy across children and adults with intermittent and mild persistent asthma...
December 6, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29199853/intermittent-fasting-and-cardiovascular-disease-current-evidence-and-unresolved-questions
#13
Grant M Tinsley, Benjamin D Horne
Intermittent fasting has produced a variety of beneficial health effects in animal models, although high-quality research in humans has been limited. This special report examines current evidences for intermittent fasting in humans, discusses issues that require further examination, and recommends new research that can improve the knowledge base in this emerging research area. While potentially useful for health improvement, intermittent fasting requires further study prior to widespread implementation for health purposes...
January 2018: Future Cardiology
https://www.readbyqxmd.com/read/29195313/chaotic-bursting-in-semiconductor-lasers
#14
Stefan Ruschel, Serhiy Yanchuk
We investigate the dynamic mechanisms for low frequency fluctuations in semiconductor lasers subjected to delayed optical feedback, using the Lang-Kobayashi model. This system of delay differential equations displays pronounced envelope dynamics, ranging from erratic, so called low frequency fluctuations to regular pulse packages, if the time scales of fast oscillations and envelope dynamics are well separated. We investigate the parameter regions where low frequency fluctuations occur and compute their Lyapunov spectra...
November 2017: Chaos
https://www.readbyqxmd.com/read/29192516/knockdown-of-angiopoietin-like-2-mimics-the-benefits-of-intermittent-fasting-on-insulin-responsiveness-and-weight-loss
#15
Cécile Martel, Anthony Pinçon, Alexandre Maxime Bélanger, Xiaoyan Luo, Marc-Antoine Gillis, Olivia de Montgolfier, Nathalie Thorin-Trescases, Éric Thorin
Angiopoietin-like 2 (ANGPTL2) is an inflammatory adipokine linking obesity to insulin resistance. Intermittent fasting, on the other hand, is a lifestyle intervention able to prevent obesity and diabetes but difficult to implement and maintain. Our objectives were to characterize a link between ANGPTL2 and intermittent fasting and to investigate whether the knockdown of ANGPTL2 reproduces the benefits of intermittent fasting on weight gain and insulin responsiveness in knockdown and wild-type littermates mice...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29182413/energetic-profile-of-the-basketball-exercise-simulation-test-in-junior-elite-players
#16
Richard Latzel, Olaf Hoos, Sebastian Stier, Sebastian Kaufmann, Volker Fresz, Dominik Reim, Ralph Beneke
PURPOSE: To analyze the energetic profile of the basketball exercise simulation test (BEST). METHODS: 10 male elite junior basketball players (age: 15.5±0.6yrs, height: 180±9cm, body mass: 66.1±11.2kg) performed a modified BEST (20 circuits consisting of jumping, sprinting, jogging, shuffling, and short breaks) simulating professional basketball game play. Circuit time, sprint time, sprint decrement, oxygen uptake (VO2), heart rate (HR), and blood lactate concentration (BLC) were obtained...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29181250/the-efficacy-of-angle-matched-isokinetic-knee-flexor-and-extensor-strength-parameters-in-predicting-agility-test-performance
#17
Matt Greig, James Naylor
Background: Agility is a fundamental performance element in many sports, but poses a high risk of injury. Hierarchical modelling has shown that eccentric hamstring strength is the primary determinant of agility performance. Purpose: The purpose of this study was to investigate the relationship between knee flexor and extensor strength parameters and a battery of agility tests. Study Design: Controlled laboratory study. Methods: Nineteen recreational intermittent games players completed an agility battery and isokinetic testing of the eccentric knee flexors (eccH) and concentric knee extensors (conQ) at 60, 180 and 300°·s-1...
October 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29163201/short-term-high-and-moderate-intensity-training-modifies-inflammatory-and-metabolic-factors-in-response-to-acute-exercise
#18
Fabio Santos Lira, Thaislaine Dos Santos, Renan Santos Caldeira, Daniela S Inoue, Valéria L G Panissa, Carolina Cabral-Santos, Eduardo Z Campos, Bruno Rodrigues, Paula A Monteiro
Purpose: To compare the acute and chronic effects of high intensity intermittent training (HIIT) and steady state training (SST) on the metabolic profile and inflammatory response in physically active men. Methods: Thirty recreationally active men were randomly allocated to a control group (n = 10), HIIT group (n = 10), or SST group (n = 10). For 5 weeks, three times per week, subjects performed HIIT (5 km 1-min at 100% of maximal aerobic speed interspersed by 1-min passive recovery) or SST (5 km at 70% of maximal aerobic speed) while the control group did not perform training...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29160143/some-autonomic-deficits-of-acute-or-chronic-cervical-spinal-contusion-reversed-by-interim-brainstem-stimulation
#19
Alberto A Vitores, Stephanie S Sloley, Catalina Martinez, Melissa M Carballosa-Gautam, Ian D Hentall
Prolonged electrical stimulation of the hindbrain's nucleus raphe magnus (NRM) or its major midbrain input region, the periaqueductal gray (PAG), was previously found in rats to promote recovery from sensory-motor and histological deficits of acute thoracic spinal cord injury (SCI). Here, some visceral deficits of acute and chronic midline cervical (C5) contusion are similarly examined. Cranially implanted wireless stimulators delivered intermittent 8 Hz, 30-70 µA cathodal pulse trains to a brainstem microelectrode...
November 21, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29159461/severe-hyperammonemic-encephalopathy-requiring-dialysis-aggravated-by-prolonged-fasting-and-intermittent-high-fat-load-in-a-ramadan-fasting-month-in-a-patient-with-cptii-homozygous-mutation
#20
P Phowthongkum, C Ittiwut, V Shotelersuk
BACKGROUND: Carnitine palmitoyltransferase II (CPTII) deficiency is a mitochondrial fatty acid oxidation disorder that can present antenatally as congenital brain malformations, or postnatally with lethal neonatal, severe infantile, or the most common adult myopathic forms. No case of severe hyperammonemia without liver dysfunction has been reported. CASE PRESENTATION: We described a 23-year-old man who presented to the emergency department with seizures and was found to have markedly elevation of serum ammonia...
November 21, 2017: JIMD Reports
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