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Nutritional ketosis

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https://www.readbyqxmd.com/read/29102145/modulating-adipose-tissue-lipolysis-and-remodeling-to-improve-immune-function-during-the-transition-period-and-early-lactation-of-dairy-cows
#1
G Andres Contreras, Clarissa Strieder-Barboza, Jenne De Koster
Despite major advances in our understanding of transition and early lactation cow physiology and the use of advanced dietary, medical, and management tools, at least half of early lactation cows are reported to develop disease and over half of cow deaths occur during the first week of lactation. Excessive lipolysis, usually measured as plasma concentrations of free fatty acids (FFA), is a major risk factor for the development of displaced abomasum, ketosis, fatty liver, and metritis, and may also lead to poor lactation performance...
October 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29077838/dietary-manipulations-that-induce-ketosis-activate-the-hpa-axis-in-male-rats-and-mice-a-potential-role-for-fibroblast-growth-factor-21
#2
Karen K Ryan, Amy E B Packard, Karlton R Larson, Jayna Stout, Sarah M Fourman, Abigail M K Thompson, Kristen Ludwick, Kirk M Habegger, Kerstin Stemmer, Nobuyuki Itoh, Diego Perez-Tilve, Matthias H Tschöp, Randy J Seeley, Yvonne M Ulrich-Lai
In response to an acute threat to homeostasis or well-being, the hypothalamic-pituitary-adrenocortical (HPA) axis is engaged. A major outcome of this HPA axis activation is the mobilization of stored energy, to fuel an appropriate behavioral and/ or physiological response to the perceived threat. Importantly, the extent of HPA axis activity is thought to be modulated by an individual's nutritional environment. In this study, we report that nutritional manipulations signaling a relative depletion of dietary carbohydrates, thereby inducing nutritional ketosis, acutely and chronically activate the HPA axis...
October 25, 2017: Endocrinology
https://www.readbyqxmd.com/read/29040389/the-anti-epileptic-ketogenic-diet-alters-hippocampal-transporter-levels-and-reduces-adiposity-in-aged-rats
#3
Abbi R Hernandez, Caesar M Hernandez, Keila T Campos, Leah M Truckenbrod, Yasemin Sakarya, Joseph A McQuail Ph D, Christy S Carter, Jennifer L Bizon, Andrew P Maurer, Sara N Burke
Nutritional ketosis is induced by high fat/low carbohydrate dietary regimens, which produce high levels of circulating ketone bodies, shifting metabolism away from glucose utilization. While ketogenic diets (KD) were initially introduced to suppress seizures, they are garnering attention for their potential to treat a myriad of neurodegenerative and metabolic disorders that are associated with advanced age. The feasibility and physiological impact of implementing a long-term KD in old animals, however, has not been systematically examined...
October 12, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29022562/ketogenic-diet-in-endocrine-disorders-current-perspectives
#4
REVIEW
L Gupta, D Khandelwal, S Kalra, P Gupta, D Dutta, S Aggarwal
Ketogenic diet (KD) is a high-fat, adequate-protein, and low-carbohydrate diet that leads to nutritional ketosis, long known for antiepileptic effects and has been used therapeutically to treat refractory epilepsy. This review attempts to summarize the evidence and clinical application of KD in diabetes, obesity, and other endocrine disorders. KD is usually animal protein based. An empiric vegetarian Indian variant of KD has been provided keeping in mind the Indian food habits. KD has beneficial effects on cardiac ischemic preconditioning, improves oxygenation in patients with respiratory failure, improves glycemic control in diabetics, is associated with significant weight loss, and has a beneficial impact on polycystic ovarian syndrome...
October 2017: Journal of Postgraduate Medicine
https://www.readbyqxmd.com/read/28914421/acid-base-safety-during-the-course-of-a-very-low-calorie-ketogenic-diet
#5
Diego Gomez-Arbelaez, Ana B Crujeiras, Ana I Castro, Albert Goday, Antonio Mas-Lorenzo, Ana Bellon, Cristina Tejera, Diego Bellido, Cristobal Galban, Ignacio Sajoux, Patricio Lopez-Jaramillo, Felipe F Casanueva
BACKGROUND AND AIMS: Very low-calorie ketogenic (VLCK) diets have been consistently shown to be an effective obesity treatment, but the current evidence for its acid-base safety is limited. The aim of the current work was to evaluate the acid-base status of obese patients during the course of a VLCK diet. METHOD: Twenty obese participants undertook a VLCK diet for 4 months. Anthropometric and biochemical parameters, and venous blood gases were obtained on four subsequent visits: visit C-1 (baseline); visit C-2, (1-2 months); maximum ketosis; visit C-3 (2-3 months), ketosis declining; and visit C-4 at 4 months, no ketosis...
October 2017: Endocrine
https://www.readbyqxmd.com/read/28688615/innovative-dairy-cow-management-to-improve-resistance-to-metabolic-and-infectious-diseases-during-the-transition-period
#6
REVIEW
P Lacasse, N Vanacker, S Ollier, C Ster
The incidence of metabolic and infectious diseases varies greatly during the lactation cycle. Most new cases of clinical mastitis appear at the beginning of lactation, and the incidence increases with the level of milk production. In addition to mastitis, many other infectious diseases become clinically apparent during the first 2weeks of lactation. During this time, cows are in a negative energy balance and must mobilize body reserves to balance the deficit between food energy intake and energy required for milk production...
June 27, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28599043/ketones-and-human-performance
#7
REVIEW
Jonathan M Scott, Patricia A Deuster
Everyone is seeking nutritional strategies that might benefit performance. One approach receiving much attention is ketones, or ketosis. Ketones are very simple compounds made of hydrogen, carbon, and oxygen, and ketosis is a metabolic state whereby the body uses predominantly ketones. Ketosis can be achieved by fasting for longer than 72 hours or by following a very lowcarbohydrate, high-fat diet (ketogenic diet) for several days to weeks. Alternatively, ketone supplements purportedly induce ketosis rapidly and do not require strict adherence to any specific type of diet; however, much of the touted benefits are anecdotal...
December 0: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28588304/plasma-fgf21-levels-in-obese-patients-undergoing-energy-restricted-diets-or-bariatric-surgery-a-marker-of-metabolic-stress
#8
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
BACKGROUND: 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 four independent centers. SUBJECTS AND METHODS: Body composition, ketosis, insulin sensitivity and FGF21 were evaluated in 181 excess body weight and 14 normal-weight subjects...
October 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28555095/nutritional-ketosis-affects-metabolism-and-behavior-in-sprague-dawley-rats-in-both-control-and-chronic-stress-environments
#9
Milene L Brownlow, Seung H Jung, Raquel J Moore, Naomi Bechmann, Ryan Jankord
Nutritional ketosis may enhance cerebral energy metabolism and has received increased interest as a way to improve or preserve performance and resilience. Most studies to date have focused on metabolic or neurological disorders while anecdotal evidence suggests that ketosis may enhance performance in the absence of underlying dysfunction. Moreover, decreased availability of glucose in the brain following stressful events is associated with impaired cognition, suggesting the need for more efficient energy sources...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28382302/economic-synergy-between-dry-cow-diet-improvement-and-monensin-bolus-use-to-prevent-subclinical-ketosis-an-experimental-demonstration-based-on-available-literature
#10
Didier Raboisson, Maxime Barbier
The prevention of subclinical ketosis (SCK) is based on maintaining adequate nutrition in dairy cows during the dry period and close to calving. Recently, an oral-route monensin bolus to prevent SCK was approved in Europe. The present study aims to define the allocation of resources for SCK management at the herd level and evaluate the profitability of administering monensin boluses in cows at risk for SCK. A stochastic model was used to calculate the total cost of SCK for a population with a given prevalence of cows at risk for SCK...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28294105/breath-acetone-as-a-potential-marker-in-clinical-practice
#11
REVIEW
Veronika Ruzsányi, Miklós Péter Kalapos
In recent decades, two facts have changed the opinion of researchers about the function of acetone in humans. Firstly, it has turned out that acetone cannot be regarded as simply a waste product of metabolism, because there are several pathways in which acetone is produced or broken down. Secondly, methods have emerged making possible its detection in exhaled breath, thereby offering an attractive alternative to investigation of blood and urine samples. From a clinical point of view the measurement of breath acetone levels is important, but there are limitations to its wide application...
June 1, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28041921/rising-trend-of-diabetes-mellitus-amongst-the-undernourished-state-of-the-art-review
#12
REVIEW
Nimmy K Francis, Harpreet S Pawar, Anirban Mitra, Analava Mitra
Diabetes mellitus is prevailing in the malnourished populations congruently in well-nourished ones with an escalating trend in the former group regardless of the absence of obesity as an etiologic determining factor as per the studies in underprivileged sectors of the population. Chronic undernutrition across a lifetime may be an imperative stimulator of diabetes in an individual either by progressively reducing beta cell function alongside islet cell volume and increasing the individual predisposition to other genetic or environmental diabetogenic influences with modifying influence on the course of clinical syndrome...
December 23, 2016: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/27999529/exogenous-ketone-supplements-reduce-anxiety-related-behavior-in-sprague-dawley-and-wistar-albino-glaxo-rijswijk-rats
#13
Csilla Ari, Zsolt Kovács, Gabor Juhasz, Cem Murdun, Craig R Goldhagen, Andrew P Koutnik, Angela M Poff, Shannon L Kesl, Dominic P D'Agostino
Nutritional ketosis has been proven effective for seizure disorders and other neurological disorders. The focus of this study was to determine the effects of ketone supplementation on anxiety-related behavior in Sprague-Dawley (SPD) and Wistar Albino Glaxo/Rijswijk (WAG/Rij) rats. We tested exogenous ketone supplements added to food and fed chronically for 83 days in SPD rats and administered sub-chronically for 7 days in both rat models by daily intragastric gavage bolus followed by assessment of anxiety measures on elevated plus maze (EPM)...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/27975191/significance-of-insulin-resistance-and-oxidative-stress-in-dairy-cattle-with-subclinical-ketosis-during-the-transition-period
#14
REVIEW
Mohamed Youssef, Maged El-Ashker
Health problems occurring during the transition period in dairy cattle are of utmost importance as they can decrease the animal's reproductive performance and favor the development of various metabolic diseases with resultant significant reproductive disorders. Among the commonly reported metabolic diseases occurring during that time, hyperketonemia is the most prevalent and could provoke a significant economic impact. The failing of a dairy cow to transit optimally between pregnancy and lactation is economically very relevant and should be considered...
February 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27861911/metabolism-of-ketone-bodies-during-exercise-and-training-physiological-basis-for-exogenous-supplementation
#15
Mark Evans, Karl E Cogan, Brendan Egan
Optimising training and performance through nutrition strategies is central to supporting elite sportspeople, much of which has focused on manipulating the relative intake of carbohydrate and fat and their contributions as fuels for energy provision. The ketone bodies, namely acetoacetate, acetone and β-hydroxybutyrate (βHB), are produced in the liver during conditions of reduced carbohydrate availability and serve as an alternative fuel source for peripheral tissues including brain, heart and skeletal muscle...
May 1, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/27716805/how-metabolic-diseases-impact-the-use-of-antimicrobials-a-formal-demonstration-in-the-field-of-veterinary-medicine
#16
Didier Raboisson, Maxime Barbier, Elise Maigné
Decreasing the use of antimicrobials has become a primary objective for both human and veterinary medicine in many countries. Medical prevention and good nutrition are seen as key parameters for reducing antimicrobial use. However, little consideration has been given to how metabolic diseases may influence the use of antimicrobials in humans and animals through limiting the prevalence and severity of infectious diseases. To quantify this relationship using the example of a common metabolic disease in dairy cows (subclinical ketosis, SCK), we constructed a stochastic model reporting the total quantity of curative antimicrobials for a given population with the prevalence of cows at risk for SCK...
2016: PloS One
https://www.readbyqxmd.com/read/27663364/periparturient-immunosuppression-and-strategies-to-improve-dairy-cow-health-during-the-periparturient-period
#17
REVIEW
J W Aleri, B C Hine, M F Pyman, P D Mansell, W J Wales, B Mallard, A D Fisher
Common health problems observed during peripartum include milk fever, mastitis, fatty liver disease, ketosis, dystocia, retained placenta, metritis, hypomagnesaemia and abomasal displacements. The increased incidence of health problems observed during the periparturient period can be partly attributed to suboptimal immune responses. Factors contributing to decreased periparturient immunity include the act of parturition itself, impaired leukocytic activity, effects of colostrogenesis and lactogenesis, and associated hypocalcemia and negative energy balance...
October 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27651671/rumen-protected-choline-a-significance-effect-on-dairy-cattle-nutrition
#18
REVIEW
G Jayaprakash, M Sathiyabarathi, M Arokia Robert, T Tamilmani
Choline is a vitamin-like substance it has multi-function in animal production, reproduction, and health. The transition period is most crucial stage in lactation cycle of dairy cows due to its association with negative hormonal and energy balances. Unfortunately, unprotected choline easily degrades in the rumen; therefore, choline added to the diet in a rumen-protected form. The use of rumen-protected choline (RPC) is a preventive measurement for the fatty liver syndrome and ketosis; may improve milk production as well as milk composition and reproduction parameters...
August 2016: Veterinary World
https://www.readbyqxmd.com/read/27626197/fueling-performance-ketones-enter-the-mix
#19
COMMENT
Brendan Egan, Dominic P D'Agostino
Ketone body metabolites serve as alternative energy substrates during prolonged fasting, calorie restriction, or reduced carbohydrate (CHO) availability. Using a ketone ester supplement, Cox et al. (2016) demonstrate that acute nutritional ketosis alters substrate utilization patterns during exercise, reduces lactate production, and improves time-trial performance in elite cyclists.
September 13, 2016: Cell Metabolism
https://www.readbyqxmd.com/read/27475046/nutritional-ketosis-alters-fuel-preference-and-thereby-endurance-performance-in-athletes
#20
RANDOMIZED CONTROLLED TRIAL
Pete J Cox, Tom Kirk, Tom Ashmore, Kristof Willerton, Rhys Evans, Alan Smith, Andrew J Murray, Brianna Stubbs, James West, Stewart W McLure, M Todd King, Michael S Dodd, Cameron Holloway, Stefan Neubauer, Scott Drawer, Richard L Veech, Julian L Griffin, Kieran Clarke
Ketosis, the metabolic response to energy crisis, is a mechanism to sustain life by altering oxidative fuel selection. Often overlooked for its metabolic potential, ketosis is poorly understood outside of starvation or diabetic crisis. Thus, we studied the biochemical advantages of ketosis in humans using a ketone ester-based form of nutrition without the unwanted milieu of endogenous ketone body production by caloric or carbohydrate restriction. In five separate studies of 39 high-performance athletes, we show how this unique metabolic state improves physical endurance by altering fuel competition for oxidative respiration...
August 9, 2016: Cell Metabolism
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