Metabolic inhibition increases feeding and brain Fos-like immunoreactivity as a function of diet

1998 ◽  
Vol 275 (2) ◽  
pp. R448-R459 ◽  
Author(s):  
Charles C. Horn ◽  
Mark I. Friedman
Keyword(s):  
Food Intake ◽  
Brain Regions ◽  
Metabolic Inhibition ◽  
Metabolic Inhibitors ◽  
High Fat ◽  
Brain Nuclei ◽  
High Carbohydrate ◽  
Low Carbohydrate ◽  
Vagal Afferent ◽  
Number Of Cells

Whether administration of 2,5-anhydro-d-mannitol (2,5-AM) or methyl palmoxirate (MP) elicits eating behavior in rats depends on the composition of the maintenance diet. To assess whether specific brain sites are involved in triggering the eating responses to these metabolic inhibitors, we measured food intake and Fos-like immunoreactivity (Fos-li) in rats maintained on either a low-fat/high-carbohydrate (LF/HC) or high-fat/low-carbohydrate (HF/LC) diet. Rats fed the LF/HC diet increased food intake after administration of 2,5-AM (200 mg/kg ip) but not after treatment with MP (10 mg/kg po), whereas rats maintained on the HF/LC diet increased food intake in response to MP administration but not after 2,5-AM injection. The effects of these inhibitors on brain Fos-li in several specific brain nuclei paralleled those on feeding behavior; that is, the number of cells showing Fos-li increased only under dietary conditions in which 2,5-AM or MP stimulated eating. These results suggest that the eating response to metabolic inhibition is tied to increased neuronal activity in brain regions that process vagal afferent signals.

723-P: Effect of Low-Carbohydrate High-Fat vs. High-Carbohydrate Low-Fat Diet on HbA1c Control in Chinese Patients with Type 2 Diabetes

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 723-P
Author(s):  
LINGWANG AN ◽  
DANDAN WANG ◽  
XIAORONG SHI ◽  
CHENHUI LIU ◽  
KUEICHUN YEH ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Chinese Patients ◽  
High Fat ◽  
Low Fat ◽  
High Carbohydrate ◽  
Low Fat Diet ◽  
Low Carbohydrate ◽  
Hba1c Control

scholarly journals Effects of Palm Stearin versus Butter in the Context of Low-Carbohydrate/High-Fat and High-Carbohydrate/Low-Fat Diets on Circulating Lipids in a Controlled Feeding Study in Healthy Humans

Nutrients ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1944
Author(s):  
Parker N. Hyde ◽  
Teryn N. Sapper ◽  
Richard A. LaFountain ◽  
Madison L. Kackley ◽  
Alex Buga ◽  
...  
Keyword(s):  
Particle Distribution ◽  
Oxidized Ldl ◽  
Saturated Fatty Acids ◽  
Density Lipoprotein ◽  
Palm Stearin ◽  
High Fat ◽  
Low Fat ◽  
High Carbohydrate ◽  
Ldl Particles ◽  
Low Carbohydrate

Background. Foods rich in saturated fatty acids (SFAs) have been discouraged by virtue of their cholesterol-raising potential, but this effect is modulated by the food source and background level of carbohydrate. Objective. We aimed to compare the consumption of palm stearin (PS) versus butter on circulating cholesterol responses in the setting of both a low-carbohydrate/high-fat (LC/HF) and high-carbohydrate/low-fat (HC/LF) diet in healthy subjects. We also explored effects on plasma lipoprotein particle distribution and fatty acid composition. Methods. We performed a randomized, controlled-feeding, cross-over study that compared a PS- versus a Butter-based diet in a group of normocholesterolemic, non-obese adults. A controlled canola oil-based ‘Run-In’ diet preceded the experimental PS and Butter diets. All diets were eucaloric, provided for 3-weeks, and had the same macronutrient distribution but varied in primary fat source (40% of the total fat). The same Run-In and cross-over experiments were done in two separate groups who self-selected to either a LC/HF (n = 12) or a HC/LF (n = 12) diet track. The primary outcomes were low-density lipoprotein-cholesterol (LDL-C), high-density lipoprotein (HDL)-C, triglycerides, and LDL particle distribution. Results. Compared to PS, Butter resulted in higher LDL-C in both the LC/HF (13.4%, p = 0.003) and HC/LF (10.8%, p = 0.002) groups, which was primarily attributed to large LDL I and LDL IIa particles. There were no differences between PS and Butter in HDL-C, triglycerides, or small LDL particles. Oxidized LDL was lower after PS than Butter in LC/HF (p = 0.011), but not the HC/LF group. Conclusions. These results demonstrate that Butter raises LDL-C relative to PS in healthy normocholesterolemic adults regardless of background variations in carbohydrate and fat, an effect primarily attributed to larger cholesterol-rich LDL particles.

scholarly journals Appetite and blood glucose profiles in humans after glycogen-depleting exercise

1999 ◽  
Vol 87 (3) ◽  
pp. 947-954 ◽  
Author(s):  
Kathleen J. Melanson ◽  
Margriet S. Westerterp-Plantenga ◽  
L. Arthur Campfield ◽  
Wim H. M. Saris
Keyword(s):  
Blood Glucose ◽  
Respiratory Quotient ◽  
Moderate Exercise ◽  
High Fat ◽  
High Carbohydrate ◽  
Low Carbohydrate ◽  
Glucose Profiles ◽  
Regulatory Functions ◽  
Glycogen Stores ◽  
The Relationship

Regulatory functions of glycogen stores and blood glucose on human appetite, particularly relating to exercise, are not fully understood. Ten men (age 20–31 yr) performed glycogen-depleting exercise in an evening, ate a low-carbohydrate dinner, and stayed overnight in the laboratory. The next day, blood glucose was monitored continuously for 517 ± 23 (SE) min. Subjects had access to high-fat and high-carbohydrate foods after baseline glucose and respiratory quotient were determined. In the afternoon, 1 h of moderate exercise was performed. Baseline respiratory quotient was 0.748 ± 0.008, plasma free fatty acids were 677 ± 123 μmol/l, insulin was 4.8 ± 0.5 μU/ml, and leptin was 1.9 ± 0.3 ng/ml. Postabsorptively, 8 of 10 meals were initiated during stability in blood glucose. Postprandially, the association between meal initiation and blood glucose declines became significant (χ2 = 7.82). During moderate exercise, blood glucose initially decreased but recovered before completion. When the glycogen buffer is depleted, meal initiation can occur during blood glucose stability; the relationship between blood glucose declines and meal initiation reestablishes with refeeding.

Food intake and gastric emptying in rats with streptozotocin-induced diabetes

1984 ◽  
Vol 247 (6) ◽  
pp. R1054-R1061 ◽  
Author(s):  
J. G. Granneman ◽  
E. M. Stricker
Keyword(s):  
Gastric Emptying ◽  
Food Intake ◽  
Glucose Absorption ◽  
Diabetic Rats ◽  
High Carbohydrate Diet ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
High Carbohydrate ◽  
Low Carbohydrate ◽  
Streptozotocin Induced Diabetes

Recent studies suggest that the rate of nutrient transit through the upper gastrointestract may provide cues that are important to the control of food intake. We examined gastrointestinal function in rats with streptozotocin-induced diabetes and related these findings to concomitant changes in food intake. Control and diabetic rats were adapted to one of two isocaloric diets either high in carbohydrate or fat. Control rats ate similar amounts of each diet. In contrast, diabetic animals fed high-carbohydrate diet were hyperphagic, whereas those fed low-carbohydrate diet ate normal amounts of food. Gastric emptying, intestinal mass, disaccharidase activity, and glucose absorption were increased in normophagic diabetic rats fed a low-carbohydrate diet. Feeding diabetic rats high-carbohydrate diet potentiated each of these effects, and food intake was highly correlated with rate of gastric emptying. These and other results indicate that diabetes enhances gastric emptying and intestinal carbohydrate digestion and absorption, even in the absence of hyperphagia. Consequently, the hyperphagia of diabetic rats may be in part a behavioral response to a greatly accelerated clearance of nutrients from the upper gastrointestinal tract that occurs when these animals are fed diets rich in carbohydrate.

scholarly journals A Cross-Sectional Study on the Dietary Pattern Impact on Cardiovascular Disease Biomarkers in Malaysia

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tilakavati Karupaiah ◽  
Khun-Aik Chuah ◽  
Karuthan Chinna ◽  
Peter Pressman ◽  
Roger A. Clemens ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Saturated Fat ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
High Fat ◽  
Cross Sectional ◽  
Disease Biomarkers ◽  
Lipoprotein Particles ◽  
High Carbohydrate ◽  
Low Carbohydrate

Abstract We conducted this cross-sectional population study with a healthy multi-ethnic urban population (n = 577) in Malaysia, combining nutritional assessments with cardiometabolic biomarkers defined by lipid, atherogenic lipoproteins, inflammation and insulin resistance. We found diametrically opposing associations of carbohydrate (246·6 ± 57·7 g, 54·3 ± 6·5%-TEI) and fat (total = 64·5 ± 19·8 g, 31·6 ± 5·5%-TEI; saturated fat = 14·1 ± 2·7%-TEI) intakes as regards waist circumference, HDL-C, blood pressure, glucose, insulin and HOMA2-IR as well as the large-LDL and large-HDL lipoprotein particles. Diets were then differentiated into either low fat (LF, <30% TEI or <50 g) or high fat (HF, >35% TEI or >70 g) and low carbohydrate (LC, <210 g) or high carbohydrate (HC, >285 g) which yielded LFLC, LFHC, HFLC and HFHC groupings. Cardiometabolic biomarkers were not significantly different (P > 0.05) between LFLC and HFLC groups. LFLC had significantly higher large-LDL particle concentrations compared to HFHC. HOMA-IR2 was significantly higher with HFHC (1·91 ± 1·85, P < 0·001) versus other fat-carbohydrate combinations (LFLC = 1·34 ± 1·07, HFLC = 1·41 ± 1·07; LFHC = 1·31 ± 0·93). After co-variate adjustment, odds of having HOMA2-IR >1.7 in the HFHC group was 2.43 (95% CI: 1·03, 5·72) times more compared to LFLC while odds of having large-LDL <450 nmol/L in the HFHC group was 1.91 (95% CI: 1·06, 3·44) more compared to latter group. Our data suggests that a HFHC dietary combination in Malaysian adults is associated with significant impact on lipoprotein particles and insulin resistance.

Effect of diet on triolein absorption in weanling rats

1990 ◽  
Vol 258 (1) ◽  
pp. G38-G44 ◽  
Author(s):  
C. A. Flores ◽  
P. M. Brannon ◽  
M. A. Wells ◽  
M. Morrill ◽  
O. Koldovsky
Keyword(s):  
Dietary Fat ◽  
Intact Animal ◽  
Fat Intake ◽  
Fat Absorption ◽  
High Fat ◽  
High Carbohydrate ◽  
Weanling Rats ◽  
Low Carbohydrate ◽  
Triton Wr 1339

To determine the effect of altered dietary fat intake on the rate of fat absorption in the intact animal, we fed male weanling rats either a high fat-low carbohydrate (HF-LC) (calories: 67% fat, 10% carbohydrate, 20% protein) or low fat-high carbohydrate (LF-HC) (calories: 10% fat, 67% carbohydrate, 20% protein) diet for 8 days. Absorption of [14C]triolein was estimated by determining 1) 14CO2 expiration in breath, 2) intestinal triglyceride output using Triton WR-1339, an inhibitor of lipoprotein lipase, and 3) quantitating the disappearance of labeled triolein from the gastrointestinal tract. Changes in the activity of pancreatic lipase and amylase confirmed the adaptation to altered fat and carbohydrate intake. Animals fed the HF-LC diet exhibited approximately twofold greater triolein disappearance, oxidation, and intestinal triglyceride output compared with animals fed LF-HC. There was also a highly significant linear relationship between 14CO2 excretion and intestinal triglyceride output in both diet groups. These data show that high dietary fat content markedly enhances in vivo fat absorption in the weanling rat.

scholarly journals Differing effects of high-fat or high-carbohydrate meals on food hedonics in overweight and obese individuals

2016 ◽  
Vol 115 (10) ◽  
pp. 1875-1884 ◽  
Author(s):  
Mark Hopkins ◽  
Catherine Gibbons ◽  
Phillipa Caudwell ◽  
John E. Blundell ◽  
Graham Finlayson
Keyword(s):  
Energy Intake ◽  
High Fat ◽  
Appetite Control ◽  
Short Term ◽  
High Carbohydrate ◽  
Low Carbohydrate ◽  
Before And After ◽  
Ad Libitum ◽  
The Impact ◽  
Food Hedonics

AbstractAlthough the effects of dietary fat and carbohydrate on satiety are well documented, little is known about the impact of these macronutrients on food hedonics. We examined the effects ofad libitumand isoenergetic meals varying in fat and carbohydrate on satiety, energy intake and food hedonics. In all, sixty-five overweight and obese individuals (BMI=30·9 (sd3·8) kg/m2) completed two separate test meal days in a randomised order in which they consumed high-fat/low-carbohydrate (HFLC) or low-fat/high-carbohydrate (LFHC) foods. Satiety was measured using subjective appetite ratings to calculate the satiety quotient. Satiation was assessed by intake atad libitummeals. Hedonic measures of explicit liking (subjective ratings) and implicit wanting (speed of forced choice) for an array of HFLC and LFHC foods were also tested before and after isoenergetic HFLC and LFHC meals. The satiety quotient was greater afterad libitumand isoenergetic meals during the LFHC condition compared with the HFLC condition (P=0·006 andP=0·001, respectively), whereasad libitumenergy intake was lower in the LFHC condition (P<0·001). Importantly, the LFHC meal also reduced explicit liking (P<0·001) and implicit wanting (P=0·011) for HFLC foods compared with the isoenergetic HFLC meal, which failed to suppress the hedonic appeal of subsequent HFLC foods. Therefore, when coupled with increased satiety and lower energy intake, the greater suppression of hedonic appeal for high-fat food seen with LFHC foods provides a further mechanism for why these foods promote better short-term appetite control than HFLC foods.

scholarly journals Investigation of an Alternative Collection Method for Food Intake Biomarkers Discriminates a High Fat-High Protein Meat-Based Diet from a High Carbohydrate Vegan Diet

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 1176-1176
Author(s):  
Megan McNairn ◽  
Kayla Dillard ◽  
Hannah Heath ◽  
Matthew Pantaleon ◽  
Rob Fanter ◽  
...  
Keyword(s):  
Food Intake ◽  
Dietary Intake ◽  
Urine Sample ◽  
Ketone Bodies ◽  
Controlled Trial ◽  
High Protein ◽  
Food Type ◽  
Vegan Diet ◽  
High Fat ◽  
High Carbohydrate

Abstract Objectives Due to the challenges associated with accurate monitoring of dietary intake in humans, the use of food intake biomarker (FIB) analysis as a complement to dietary questionnaires has been explored. However, numerous limitations exist including the requirement of 24-hour urine collection, currently the best method of FIB assessment. As a potentially more convenient and accurate means of monitoring dietary intake, we explored the utility of postprandial dried blood spot (DBS) collection. The hypothesis of this study was that metabolic profiles in both DBS and urine under controlled feeding conditions would similarly reflect differences in diets of varying food type and macronutrient distribution. Methods This was a randomized controlled trial with a crossover design including healthy volunteers (n = 8) from the San Luis Obispo, CA. The standardized isocaloric diet interventions included a high fat, high protein meat diet (HFPM) versus a high carbohydrate vegan (HCV) diet. Participants attended two intervention days, separated by a two-week washout. During each intervention day, a finger-prick blood sample was collected one hour before each meal (at 8 am, 12 pm, and 4 pm). Participants also collected their urine for 24-hours. DBS and urine samples were analyzed by LC-MS in order to identify diet-discriminatory biomarkers. Results Both the DBS and urine sample analysis identified biomarkers that differentiated the HFPM and HCV diets (P &lt; 0.05). Most notably, in both the DBS and urine, post-HFPM consumption had higher levels of amino acids and creatine while the HCV diet was associated with elevated sorbitol and hippuric acid (P &lt; 0.05). Unique to DBS, the HFPM diet had higher ketone bodies and triacylglycerols with &lt;54 total carbons while post-HCV diets had higher levels of triacylglycerols with ≥54 total carbons (P &lt; 0.05). Exclusive to urine sample metabolite changes, post-HFPM had elevated cis-trans hydroxyproline and several nucleoside mono- and di-phosphates (P &lt; 0.05). Conclusions DBS and urine collections were similarly capable of differentiating the diets consumed in this study. The potential use of DBS as a more efficient method of FIB identification deserves further investigation. Funding Sources Cal Poly CAFES SURP and the Department of Food Science and Nutrition.

Chronic ingestion of dietary fat is a prerequisite for inhibition of feeding by enterostatin

1998 ◽  
Vol 275 (2) ◽  
pp. R619-R623 ◽  
Author(s):  
Ling Lin ◽  
David A. York
Keyword(s):  
Food Intake ◽  
Dietary Fat ◽  
Biological Response ◽  
Testing Time ◽  
High Fat ◽  
High Carbohydrate ◽  
Neurochemical Change ◽  
Chronic Ingestion ◽  
First Time ◽  
Fasted Rats

Enterostatin (Ent), the activation pentapeptide from procolipase, inhibits the intake of dietary fat. The selectivity of the response to fat suggests that the rat must recognize a permissive signal related to dietary fat for the Ent biological response. To investigate the nature of this signal, we studied the effects of Ent in rats that were adapted to either a high-fat (HF) or high-carbohydrate/low-fat (HC) diet and then naively exposed to either HF or HC diets. Ent (1 nmol) was injected into the lateral ventricle of overnight-fasted rats, and food intake was measured. Rats adapted to HF diet and tested with HC diet responded to Ent, but rats adapted to HC diet and tested with HF did not respond to Ent. The groups were maintained on their new test diets for up to 21 days and tested again for their response to Ent at 3, 7, 14, and 21 days. Ent response did not appear in HC-adapted rats switched to HF diet before 21 days. Conversely, the HF-adapted rats, which responded to Ent when tested with HC diet for the first time, did not respond at any subsequent testing time. The data suggest that chronic ingestion of dietary fat is required for Ent action and that chronic consumption of fat initiates a postingestion metabolic, endocrine, or neurochemical change that is required for the biological response to Ent.

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