scholarly journals The influence of dietary fibre on caecal metabolism in the rat

1983 ◽  
Vol 50 (3) ◽  
pp. 679-684 ◽  
Author(s):  
Linda F. McKay ◽  
Martin A. Eastwood
Keyword(s):  
Colonic Mucosa ◽  
Short Chain Fatty Acids ◽  
Female Rats ◽  
Bacterial Metabolism ◽  
Differential Absorption ◽  
High Fat ◽  
Male And Female ◽  
Male And Female Rats ◽  
High Fibre ◽  
Commercial Breeding

1. The influence of three diets ((1) high-fibre–low-fat, (2) low-fibre–high-fat, (3) commercial breeding diet) on the concentration of short chain fatty acids (SCFA) has been investigated in male and female rats up to 14 weeks of age.2. Hydrogen was detected in respired gas in all rats with no significant differences between diets or sex. Methane was detected only in control-fed rats at 12 weeks of age and thereafter. Caecal contents contained higher concentrations of SCFA than were found in faeces. There were no significant differences in the total faecal SCFA excreted by rats on the three diets. The proportions of SCFA in the caecum and faeces were influenced by diet.3. The production and excretion of hydrogen, methane and SCFA in the rat appeared to reflect different aspects of bacterial metabolism. Comparison of caecal and faecal SCFA may indicate differential absorption from the colon or differential metabolism by bacteria or colonic mucosa which may be influenced by diet.

scholarly journals Long-term High-fat-diet Feeding Impairs Mitochondrial Biogenesis in Liver of Male and Female Rats

2010 ◽  
Vol 26 (3) ◽  
pp. 291-302 ◽  
Author(s):  
Antònia Nadal-Casellas ◽  
Emilia Amengual-Cladera ◽  
Ana María Proenza ◽  
Isabel Lladó ◽  
Magdalena Gianotti
Keyword(s):  
Mitochondrial Biogenesis ◽  
High Fat Diet ◽  
Female Rats ◽  
High Fat ◽  
Male And Female ◽  
Male And Female Rats

Long-term effects of high-fat diets on peroxisomal β-oxidation in male and female rats

Lipids ◽  
1985 ◽  
Vol 20 (10) ◽  
pp. 668-674 ◽  
Author(s):  
M. S. Thomassen ◽  
J. Norseth ◽  
E. N. Christiansen
Keyword(s):  
Female Rats ◽  
Long Term Effects ◽  
High Fat ◽  
Male And Female ◽  
Male And Female Rats ◽  
High Fat Diets ◽  
Fat Diets

Hyperplastic and Early Neoplastic Lesions of the Liver in Rats of Varying Ages with Dietary-Induced Cirrhosis

1969 ◽  
Vol 55 (2) ◽  
pp. 79-83 ◽  
Author(s):  
Melvin D. Reuber
Keyword(s):  
Female Rats ◽  
High Fat ◽  
Chemical Carcinogens ◽  
Deficient Diet ◽  
Male And Female ◽  
Low Protein ◽  
Male And Female Rats ◽  
Neoplastic Lesions ◽  
Parenchymal Cells ◽  
Age And Sex

Inbred Buffalo male and female rats, 4-, 8-, 12-, 24-, and 52-weeks old, ingested a high fat, low protein and choline deficient diet. Preneoplastic and early neoplastic lesions of the parenchymal cells, as well as cirrhosis, developed in the liver. Hyperplastic lesions generally were observed more often in male animals and in younger animals. The hyperplastic lesions, developing in the periportal regions, were similar histologically and with regard to age and sex to lesions demonstrated as precarcinogenic in animals given chemical carcinogens.

scholarly journals The Effects of Eating a High Fat Diet on Sensitivity of Male and Female Rats to Methamphetamine and Dopamine D1 Receptor Agonist SKF 82958

2020 ◽  
Vol 374 (1) ◽  
pp. 6-15
Author(s):  
Jeremiah Ramos ◽  
Ethan J. Hardin ◽  
Alice H. Grant ◽  
Grace Flores-Robles ◽  
Adrian T. Gonzalez ◽  
...  
Keyword(s):  
High Fat Diet ◽  
Receptor Agonist ◽  
Dopamine D1 Receptor ◽  
D1 Receptor ◽  
Female Rats ◽  
High Fat ◽  
Male And Female ◽  
Male And Female Rats ◽  
Skf 82958

scholarly journals Effect of High-fat Diet on Tracheal Responsiveness to Methacholine and Insulin Resistance Index in Ovalbumin-sensitized Male and Female Rats

2019 ◽  
Author(s):  
Hassan Ghobadi ◽  
Mohammad Reza Alipour ◽  
Rana Keyhanmanesh ◽  
Mohammad Hossein Boskabady ◽  
Mohammad Reza Aslani
Keyword(s):  
Insulin Resistance ◽  
High Fat Diet ◽  
Close Association ◽  
Serum Insulin ◽  
Resistance Index ◽  
Normal Diet ◽  
Female Rats ◽  
High Fat ◽  
Male And Female ◽  
Male And Female Rats

Epidemiological and clinical studies have demonstrated a close association between obesity and asthma. The current study investigated the effect of high-fat diet on tracheal responsiveness to methacholine and insulin resistance in ovalbumin (OVA) sensitized male and female rats. The rats were divided into eight groups (n=6 per group): female with the normal diet (F+ND), male with the normal diet (M+ND), female OVA-sensitized with the normal diet (F+SND), male OVA-sensitized with the normal diet (M+SND), female with high-fat diet (F+HFD), male with high-fat diet (M+HFD), female OVA-sensitized with high-fat diet (F+SHFD), and male OVA-sensitized with high-fat diet (M+SHFD). All rats were fed for 8 weeks with high-fat diet or standard pelts, and for another 4 weeks, they were sensitized with OVA or saline. At the end of the study, the tracheal responsiveness to methacholine, serum insulin, and blood glucose levels was measured. Also, insulin resistance indexes were determined. OVA-sensitization and diet-induced obesity caused the curve of methacholine concentration response to shifting to the left. In addition, results indicated that the EC50 (the effective concentration of methacholine generating 50% of peak response) in F+SHFD rats was statistically lower than M+SHFD group (p<0.05). Moreover, insulin resistance was higher in the F+SHFD than the M+SHFD group (p<0.001). These results suggest that insulin resistance and metabolic syndrome may be involved in the pathogenesis of obesity associated with OVA-sensitized rats condition, especially in female animals.  

scholarly journals Effects of Diet-Induced Obesity on Hypothalamic Kisspeptin-Neurokinin-Dynorphin (KNDy) Neurons and Luteinizing Hormone Secretion in Sex Hormone-Primed Male and Female Rats

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A537-A537
Author(s):  
Shiori Minabe ◽  
Kinuyo Iwata ◽  
Hitoshi Ozawa
Keyword(s):  
Gene Expression ◽  
Luteinizing Hormone ◽  
High Fat Diet ◽  
Female Rats ◽  
Male Rats ◽  
High Fat ◽  
Neurokinin B ◽  
Male And Female ◽  
Male And Female Rats ◽  
Kndy Neurons

Abstract Metabolic stress resulting from a nutrient excess causes infertility in both sexes. Kisspeptin-neurokinin B-dynorphin (KNDy) neurons in the arcuate nucleus (ARC) have been suggested to be key players in reproduction via direct stimulation of gonadotropin-releasing hormone (GnRH) and subsequent gonadotropin release in mammalian species. In this study, we investigated the sex differences in the effects of a high-fat diet (HFD) on KNDy-associated gene expression in the ARC to determine the pathogenic mechanism underlying obesity-induced infertility. Wistar-Imamichi strain male and female rats (7 weeks of age) were fed either a standard diet (10% calories from fat) or high-fat diet (45% calories from fat) for 4 months. In male rats, the HFD caused a significant suppression of Kiss1(encoding kisspeptin), Tac3(encoding neurokinin B), and Pdyn(encoding dynorphin A) gene expression in the ARC, resulting in a decrease in plasma luteinizing hormone (LH) levels. In female rats, 58% of the HFD-fed female rats exhibited irregular estrous cycles, while the other rats showed regular cycles. LH pulses were found, and the numbers of ARC Kiss1-,Tac3-, and Pdyn-expressing cells were high in control animals and almost allHFD-fed female rats, but two out of 10 rats showed profound HFD-induced suppression of LH pulse frequency and reduction in these cells. No statistical differences in LH secretion or ARC KNDy gene expression were observed between HFD-fed and control female rats. Additionally, the number of Gnrh1-expressing cells in the preoptic area was comparable between the groups in both sexes. Our findings revealed that HFD-fed male rats showed KNDy-dependent infertility, while irregular menstruation was mainly induced by KNDy-independent pathways during the incipient stage of obese infertility in female rats. Taken together, hypothalamic kisspeptin neurons in male rats may be susceptible to HFD-induced obesity compared with those in female rats.

scholarly journals Energy expenditure in obesity-prone and obesity-resistant rats before and after the introduction of a high-fat diet

2010 ◽  
Vol 299 (4) ◽  
pp. R1097-R1105 ◽  
Author(s):  
Matthew R. Jackman ◽  
Paul S. MacLean ◽  
Daniel H. Bessesen
Keyword(s):  
Physical Activity ◽  
Weight Gain ◽  
Energy Expenditure ◽  
Energy Intake ◽  
High Fat Diet ◽  
Female Rats ◽  
High Fat ◽  
Male And Female ◽  
Male And Female Rats ◽  
Before And After

While most rats gain weight when placed on a high-fat diet (HFD), some strains resist HFD-induced weight gain. To maintain weight, obesity-resistant (OR) rats must either eat less than obesity-prone (OP) rats or increase total energy expenditure (TEE). To determine if changes in TEE predispose to or protect from weight gain, energy expenditure, energy intake, and weight gain were measured in male and female OP and OR rats consuming a low-fat diet (LFD) and for 5 days after switching to a HFD. After 5 days on a HFD, OP rats gained significantly more weight (male: 42.8 ± 6.9 g, female: 25.5 ± 3.0 g) than their OR counterparts (male: 24.0 ± 7.5 g, female: 13.7 ± 1.4 g). Both male and female rats significantly increased their energy intake when transitioned to the HFD, and TEE increased modestly in all groups. Compared with female OP rats, female OR rats had a significantly greater increase in TEE on the HFD. This was due to an increase in both resting and nonresting energy expenditure. In contrast, the effect of the HFD in males was minor. TEE was also measured in female rats consuming a HFD, pair fed to LFD calories. The increase in TEE of pair-fed female OR rats was substantially less than what was seen in the HFD ad libitum condition. Physical activity was also measured in female rats. There was no evidence that increases in physical activity were the cause of the increased TEE seen in female OR rats consuming a HFD. These results suggest that resistance to HFD-induced weight gain in female OR rats may be due in part to an increase in TEE and a greater reliance on lipid as an energy source. Changes in TEE appear to be triggered by overconsumption of the HFD and not simply the diet composition.

scholarly journals EFFECT OF OBESITY AND STATIN;

2017 ◽  
Vol 24 (02) ◽  
pp. 216-220
Author(s):  
Faizania Shabbir ◽  
M. Mazhar Hussain ◽  
Tausif Ahmed Rajput ◽  
Alamgir Khan
Keyword(s):  
High Fat Diet ◽  
Treated Group ◽  
Female Rats ◽  
Control Group ◽  
Chow Diet ◽  
Sprague Dawley ◽  
High Fat ◽  
Male And Female ◽  
Male And Female Rats ◽  
Group I

Objectives: To observe the effect of obesity and subsequent atorvastatinadministration on MPV in high fat diet induced obese male and female Sprague Dawley rats.Study Design: Randomized control trial (RCT). Setting: Department of Physiology, Army MedicalCollege, Rawalpindi. Animal procurement and blood sampling was done at National Instituteof Health (NIH), Islamabad and biochemical assays were performed at Centre for Research inExperimental and Applied Medicine (CREAM), Army Medical College, Rawalpindi. Period: Thestudy was completed in 12 months. Material and Methods: Ninety healthy Sprague Dawley(male and female) rats were purchased and divided randomly into three equal groups. Ratsin normal control group (Group I) were given normal chow diet for three weeks. Rats in obesecontrol group (Group II) were given high fat diet for three weeks. Rats in obese treated group(Group III) were administered atorvastatin for three weeks in a dose of 10 mg/kg/day orally bygavage method after obesity induction. Terminal sampling was done at the end of the studyby intra-cardiac puncture. MPV is a part of blood complete picture that was analysed by KX 21Sysmex Hematology Analyzer. Results: High fat diet induced obesity resulted in a significant(p < 0.05) increase in MPV. The MPV was significantly (p < 0.05) decreased after atorvastatinadministration. The result was comparable for both genders. Conclusions: Obesity increasesMPV and hence the risk of adverse cardiovascular outcome. Atorvastatin apart from its knownlipid lowering effect, decreases MPV and can play a beneficial role in decreasing cardiovascularmorbidity and mortality. 

scholarly journals Gender Difference in Proteome of Brown Adipose Tissues between Male and Female Rats Exposed to a High Fat Diet

2011 ◽  
Vol 28 (5) ◽  
pp. 933-948 ◽  
Author(s):  
Duk Kwon Choi ◽  
Tae Seok Oh ◽  
Jung-Won Choi ◽  
Rajib Mukherjee ◽  
Xia Wang ◽  
...  
Keyword(s):  
Gender Difference ◽  
High Fat Diet ◽  
Female Rats ◽  
High Fat ◽  
Adipose Tissues ◽  
Male And Female ◽  
Male And Female Rats ◽  
Brown Adipose
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