Large, binge-type meals of high fat diet change feeding behaviour and entrain food anticipatory activity in mice☆

ABSTRACT Alterations in diet can have significant impact on the host, with high-fat diet (HFD) leading to obesity, diabetes, and inflammation of the gut. Although membership and abundances in gut bacterial communities are strongly influenced by diet, substantially less is known about how viral communities respond to dietary changes. Examining fecal contents of mice as the mice were transitioned from normal chow to HFD, we found significant changes in the relative abundances and the diversity in the gut of bacteria and their viruses. Alpha diversity of the bacterial community was significantly diminished in response to the diet change but did not change significantly in the viral community. However, the diet shift significantly impacted the beta diversity in both the bacterial and viral communities. There was a significant shift away from the relatively abundant Siphoviridae accompanied by increases in bacteriophages from the Microviridae family. The proportion of identified bacteriophage structural genes significantly decreased after the transition to HFD, with a conserved loss of integrase genes in all four experimental groups. In total, this study provides evidence for substantial changes in the intestinal virome disproportionate to bacterial changes, and with alterations in putative viral lifestyles related to chromosomal integration as a result of shift to HFD. IMPORTANCE Prior studies have shown that high-fat diet (HFD) can have profound effects on the gastrointestinal (GI) tract microbiome and also demonstrate that bacteria in the GI tract can affect metabolism and lean/obese phenotypes. We investigated whether the composition of viral communities that also inhabit the GI tract are affected by shifts from normal to HFD. We found significant and reproducible shifts in the content of GI tract viromes after the transition to HFD. The differences observed in virome community membership and their associated gene content suggest that these altered viral communities are populated by viruses that are more virulent toward their host bacteria. Because HFD also are associated with significant shifts in GI tract bacterial communities, we believe that the shifts in the viral community may serve to drive the changes that occur in associated bacterial communities.

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Ethanol Extract of Crataegus Oxyacantha L. Ameliorate Dietary Non-Alcoholic Fatty Liver Disease in Rat

Drug Research ◽

10.1055/a-0579-7532 ◽

2018 ◽

Vol 68 (10) ◽

pp. 553-559

Author(s):

Golbahar Saeedi ◽

Fereshteh Jeivad ◽

Mohammadhadi Goharbari ◽

Gholamreza Gheshlaghi ◽

Omid Sabzevari

Keyword(s):

Fatty Liver ◽

Protective Effect ◽

High Fat Diet ◽

Normal Diet ◽

Oxidative Stress Marker ◽

Histopathological Study ◽

Potential Candidate ◽

Diet Change ◽

High Fat ◽

Alcoholic Fatty Liver

Abstract Background Non-alcoholic fatty liver (NAFLD) is one the most prevalent disease worldwide which characterized by fat accumulation in liver with no established efficient therapy. We designed this study to investigate protective and therapeutic effect of Crataegus oxyacantha L. (C. oxyacantha) on NAFLD induced by high fat diet in rat models. Methods NAFLD was induced by High Fat Diet+fructose (HFD), 45 Wistar rats were divided to 8 groups including control, HFD, HFD+diet change, HFD+diet change+C. oxyacantha 20 mg/kg, co treatment of HFD+C. oxyacantha 10, 20 and 40 mg/kg, and normal diet+C. oxyacantha 40 mg. C. oxyacantha was administered orally. Effectiveness of the C. oxyacantha was assessed through measuring the biochemical factors, and oxidative stress marker (FRAP, GSH, and MDA). Histopathological study was performed using H & E staining. Results The diet change from high fat to low fat ameliorated liver damage. However, consumption of C. oxyacantha (10 & 20 mg/kg) caused significant reduction in the level of all examined liver biomarkers specially LDH, that showed C. oxyacantha can restore the hepatocyte damage due to HFD. The C. oxyacantha showed a protective effect which was more prominent in the animals treated with the 20 mg/kg C. oxyacantha. The administration of C. oxyacantha caused increased antioxidant status (GSH and FRAP levels) and decreased lipid peroxidation in treated animals. Major Conclusion Accordingly, C. oxyacantha have both therapeutic and protective effect for NAFLD and may be a potential candidate for further assessments in clinical studies.

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Welding fume inhalation exposure and high-fat diet change lipid homeostasis in rat liver

Toxicology Reports ◽

10.1016/j.toxrep.2020.10.008 ◽

2020 ◽

Vol 7 ◽

pp. 1350-1355

Author(s):

Greg R. Boyce ◽

Mohammad Shoeb ◽

Vamsi Kodali ◽

Terence G. Meighan ◽

Katherine A. Roach ◽

...

Keyword(s):

Rat Liver ◽

High Fat Diet ◽

Inhalation Exposure ◽

Lipid Homeostasis ◽

Welding Fume ◽

Diet Change ◽

High Fat

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Effects of exercise and diet change on cognition function and synaptic plasticity in high fat diet induced obese rats

Lipids in Health and Disease ◽

10.1186/1476-511x-12-144 ◽

2013 ◽

Vol 12 (1) ◽

pp. 144 ◽

Cited By ~ 41

Author(s):

Jinhee Woo ◽

Ki Shin ◽

So Park ◽

Ki Jang ◽

Sunghwun Kang

Keyword(s):

Synaptic Plasticity ◽

High Fat Diet ◽

Diet Change ◽

High Fat ◽

Obese Rats

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Arcuate nucleus homeostatic systems reflect blood leptin concentration but not feeding behaviour during scheduled feeding on a high-fat diet in mice

Journal of Neuroendocrinology ◽

10.1111/jne.12498 ◽

2017 ◽

Vol 29 (8) ◽

pp. e12498

Author(s):

T. Bake ◽

J. Baron ◽

J. S. Duncan ◽

D. G. A. Morgan ◽

J. G. Mercer

Keyword(s):

High Fat Diet ◽

Feeding Behaviour ◽

Arcuate Nucleus ◽

High Fat

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Abstract 192: High Fat Diet Promotes Haplotype Dependent Differential Transcriptional Regulation of the Human Angiotensinogen Gene

Circulation Research ◽

10.1161/res.117.suppl_1.192 ◽

2015 ◽

Vol 117 (suppl_1) ◽

Author(s):

Anita Rana ◽

Nitin Puri ◽

Sudhir Jain ◽

Ashok Kumar

Keyword(s):

Adipose Tissue ◽

Transcriptional Regulation ◽

High Fat Diet ◽

Control Diet ◽

Transcriptional Factors ◽

Antioxidant Defenses ◽

Diet Change ◽

High Fat ◽

Angiotensinogen Gene

Angiotensinogen (AGT) is the only known precursor to angiotensin II. Systemic renin angiotensin aldosterone system (RAAS) is activated in human and experimental models of obesity. RAAS activation in obesity is linked to the development of cardiovascular pathophysiologies. We have identified polymorphisms in 2.5 Kb promoter of human angiotensinogen gene (hAGT) that forms two haplotype (Hap) blocks: -6A/G (-1670A/G, -1562C/T, -1561T/C) and -217A/G (-532T/C, -793A/G, -1074T/C,& -1178G/A). Hap -6A/-217A (Hap -6A) is associated with human hypertension whereas, Hap -6G/-217G (Hap -6G) reduces cardiovascular risk. Here, we examine high fat diet-mediated allele-specific transcriptional regulation of the hAGT gene in adipose tissue, in vivo, in transgenic (TG) mice engineered with either haplotype of the hAGT gene. Twelve-week-old male TG mice with Hap –6A or –6G were fed normal diet (10% kcal as fat) and high fat diet (60% kcal as fat) for 10 weeks. Using Q - RT PCR and western blot we show increased hAGT expression in adipose tissue of the Hap -6A-TG mice after high fat diet than control diet (Hap -6A-0.68±0.04 vs. Hap -6G- 0.33±0.03 A.U., p<0.05). ChIP assay shows greater chromatin binding of GR, MR, CEBPβ and STAT3 transcriptional factors (Hap -6A- 0.80±0.04 vs. Hap -6G- 0.26±0.06 A.U., p<0.05) to the hAGT transgenes in Hap -6A TG mice after high fat diet. No significant change was observed in the endogenous mouse AGT gene. In addition, after high fat diet, change ([[Unable to Display Character: ∆]]) in inflammatory and redox markers was significantly (p<0.05) greater in TG mice with Hap I including, IL1 (4.6±0.8 vs. 2.1±0.49 fold), IL6 (4.0±0.69 vs. 2.1±0.2 fold) and NOX1 (8.3±0.4 vs. 2.5±0.6 fold). This is accompanied by reduction in levels of antioxidant defenses (SOD1: 0.97±0.0 vs. 1.4±0.1 fold; HO1: 0.77±0.1 vs. 1.3±0.2 fold) & activation of MAPK14 and ERK1/2 signaling. Taken together, our results show that SNPs in the hAGT Hap -6A favor high fat diet induced binding of transcriptional factors GR, MR, CEBP-β and STAT3 that lead to elevated expression of the hAGT in expanded mass of the adipose tissue. This also activates the RAAS with pathophysiological implications including, phosphorylation of kinases such as MAPK14 and ERK2, increase in tissue pro-inflammatory and oxidative stress molecules.

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Abstract 082: High Fat Diet Promotes Haplotype Dependent Differential Transcriptional Regulation of the Human Angiotensinogen Gene

Hypertension ◽

10.1161/hyp.66.suppl_1.082 ◽

2015 ◽

Vol 66 (suppl_1) ◽

Author(s):

Anita Rana ◽

Sudhir Jain ◽

Nitin Puri ◽

Deniz Eren ◽

Natalie Sirianni ◽

...

Keyword(s):

Adipose Tissue ◽

Transcriptional Regulation ◽

High Fat Diet ◽

Control Diet ◽

Transcriptional Factors ◽

Antioxidant Defenses ◽

Diet Change ◽

High Fat ◽

Angiotensinogen Gene

Angiotensinogen (AGT) is the only known precursor to angiotensin II. Systemic renin angiotensin aldosterone system (RAAS) is activated in human and experimental models of obesity. RAAS activation in obesity is linked to the development of cardiovascular pathophysiologies. We have identified polymorphisms in 2.5 Kb promoter of human angiotensinogen gene (hAGT) that forms two haplotype (Hap) blocks: -6A/G (-1670A/G, -1562C/T, -1561T/C) and -217A/G (-532T/C, -793A/G, -1074T/C,& -1178G/A). Hap -6A/-217A (Hap -6A) is associated with human hypertension whereas, Hap -6G/-217G (Hap -6G) reduces cardiovascular risk. Here, we examine high fat diet-mediated allele-specific transcriptional regulation of the hAGT gene in adipose tissue, in vivo, in transgenic (TG) mice engineered with either haplotype of the hAGT gene. Twelve-week-old male TG mice with Hap –6A or –6G were fed normal diet (10% kcal as fat) and high fat diet (60% kcal as fat) for 10 weeks. Using Q - RT PCR and western blot we show increased hAGT expression in adipose tissue of the Hap -6A-TG mice after high fat diet than control diet (Hap -6A-0.68±0.04 vs. Hap -6G- 0.33±0.03 A.U., p<0.05). ChIP assay shows greater chromatin binding of GR, MR, CEBPβ and STAT3 transcriptional factors (Hap -6A- 0.80±0.04 vs. Hap -6G- 0.26±0.06 A.U., p<0.05) to the hAGT transgenes in Hap -6A TG mice after high fat diet. No significant change was observed in the endogenous mouse AGT gene. In addition, after high fat diet, change ([[Unable to Display Character: ∆]]) in inflammatory and redox markers was significantly (p<0.05) greater in TG mice with Hap I including, IL1 (4.6±0.8 vs. 2.1±0.49 fold), IL6 (4.0±0.69 vs. 2.1±0.2 fold) and NOX1 (8.3±0.4 vs. 2.5±0.6 fold). This is accompanied by reduction in levels of antioxidant defenses (SOD1: 0.97±0.0 vs. 1.4±0.1 fold; HO1: 0.77±0.1 vs. 1.3±0.2 fold) & activation of MAPK14 and ERK1/2 signaling. Taken together, our results show that SNPs in the hAGT Hap -6A favor high fat diet induced binding of transcriptional factors GR, MR, CEBP-β and STAT3 that lead to elevated expression of the hAGT in expanded mass of the adipose tissue. This also activates the RAAS with pathophysiological implications including, phosphorylation of kinases such as MAPK14 and ERK2, increase in tissue pro-inflammatory and oxidative stress molecules.

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Abstract # P-20: 11b-Hydroxysteroid Dehydrogenase 1 Regulation in High Fat Diet Induced Insulin Resistant Rats and Rats Treated with Sutherlandia Frutescens

Endocrine Practice ◽

10.1016/s1530-891x(20)43833-9 ◽

2016 ◽

Vol 22 ◽

pp. 23

Author(s):

Ngozi F. Nnolum-Orji ◽

Saartjie Roux ◽

Janine Mackenzie ◽

Disang Lekutlane

Keyword(s):

High Fat Diet ◽

Hydroxysteroid Dehydrogenase ◽

High Fat ◽

Insulin Resistant ◽

Sutherlandia Frutescens

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Effects of Maternal Flaxseed Supplementation on Female Offspring of Diabetic Rats in Serum Concentration of Glucose, Insulin, and Thyroid Hormones

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000259 ◽

2019 ◽

Vol 89 (1-2) ◽

pp. 45-54

Author(s):

Akemi Suzuki ◽

André Manoel Correia-Santos ◽

Gabriela Câmara Vicente ◽

Luiz Guillermo Coca Velarde ◽

Gilson Teles Boaventura

Keyword(s):

Thyroid Hormones ◽

High Fat Diet ◽

Female Offspring ◽

Flaxseed Oil ◽

Diabetic Rats ◽

High Fat ◽

Glucose Levels ◽

Blood Glucose Levels ◽

Flaxseed Flour ◽

Maternal Consumption

Abstract. Objective: This study aimed to evaluate the effect of maternal consumption of flaxseed flour and oil on serum concentrations of glucose, insulin, and thyroid hormones of the adult female offspring of diabetic rats. Methods: Wistar rats were induced to diabetes by a high-fat diet (60%) and streptozotocin (35 mg/kg). Rats were mated and once pregnancy was confirmed, were divided into the following groups: Control Group (CG): casein-based diet; High-fat Group (HG): high-fat diet (49%); High-fat Flaxseed Group (HFG): high-fat diet supplemented with 25% flaxseed flour; High-fat Flaxseed Oil group (HOG): high-fat diet, where soya oil was replaced with flaxseed oil. After weaning, female pups (n = 6) from each group were separated, received a commercial rat diet and were sacrificed after 180 days. Serum insulin concentrations were determined by ELISA, the levels of triiodothyronine (T3), thyroxine (T4) and thyroid-stimulating hormone (TSH) were determined by chemiluminescence. Results: There was a significant reduction in body weight at weaning in HG (−31%), HFG (−33%) and HOG (44%) compared to CG (p = 0.002), which became similar by the end of 180 days. Blood glucose levels were reduced in HFG (−10%, p = 0.044) when compared to CG, and there was no significant difference between groups in relation to insulin, T3, T4, and TSH after 180 days. Conclusions: Maternal severe hyperglycemia during pregnancy and lactation resulted in a microsomal offspring. Maternal consumption of flaxseed reduces blood glucose levels in adult offspring without significant effects on insulin levels and thyroid hormones.

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