High-fat-diet induced development of increased fasting glucose levels and impaired response to intraperitoneal glucose challenge in the collaborative cross mouse genetic reference population

Ishophloroglucin A (IPA), a component of Ishige okamurae (IO), was previously evaluated to standardize the antidiabetic potency of IO. However, the potential of IPA as a functional food for diabetes prevention has not yet been evaluated. Here, we investigated if 1.35 mg/kg IPA, which is the equivalent content of IPA in 75 mg/kg IO, improved glucose homeostasis in high-fat diet (HFD)-induced diabetes after 12 weeks of treatment. IPA significantly ameliorated glucose intolerance, reducing fasting glucose levels as well as 2 h glucose levels in HFD mice. In addition, IPA exerted a protective effect on the pancreatic function in HFD mice via pancreatic β-cells and C-peptide. The level of glucose transporter 4 (GLUT4) in the muscles of HFD mice was stimulated by IPA intake. Our results suggested that IPA, which is a component of IO, can improve glucose homeostasis via GLUT4 in the muscles of HFD mice. IO may be used as a functional food for the prevention of diabetes.

Download Full-text

Investigating Susceptibility to Ozone-Induced Lung Inflammation and Injury Using the Collaborative Cross Mouse Genetic Reference Population

10.1164/ajrccm-conference.2019.199.1_meetingabstracts.a2393 ◽

2019 ◽

Author(s):

A.E. Tovar ◽

G.J. Smith ◽

J. Thomas ◽

K. McFadden ◽

S.N. Kelada

Keyword(s):

Lung Inflammation ◽

Reference Population ◽

Collaborative Cross ◽

Genetic Reference Population ◽

Mouse Genetic

Download Full-text

Collaborative Cross as the Next-Generation Mouse Genetic Reference Population Designed for Dissecting Complex Traits

Molecular-Genetic and Statistical Techniques for Behavioral and Neural Research ◽

10.1016/b978-0-12-804078-2.00009-x ◽

2018 ◽

pp. 191-224

Author(s):

Hanifa J. Abu Toamih Atamni ◽

Fuad A. Iraqi

Keyword(s):

Complex Traits ◽

Reference Population ◽

Collaborative Cross ◽

Next Generation ◽

Genetic Reference Population ◽

Mouse Genetic

Download Full-text

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.

Download Full-text

The effects of the aqueous extract and residue of Matcha on the antioxidant status and lipid and glucose levels in mice fed a high-fat diet

Food & Function ◽

10.1039/c5fo00828j ◽

2016 ◽

Vol 7 (1) ◽

pp. 294-300 ◽

Cited By ~ 10

Author(s):

Ping Xu ◽

Le Ying ◽

Gaojie Hong ◽

Yuefei Wang

Keyword(s):

Green Tea ◽

Aqueous Extract ◽

High Fat Diet ◽

Antioxidant Status ◽

High Fat ◽

Glucose Levels

Matcha is a kind of powdered green tea produced by grinding with a stone mill.

Download Full-text

Antihyperglycemic and Anti-Inflammatory Effects of StandardizedCurcuma xanthorrhizaRoxb. Extract and Its Active Compound Xanthorrhizol in High-Fat Diet-Induced Obese Mice

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2014/205915 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 6

Author(s):

Mi-Bo Kim ◽

Changhee Kim ◽

Youngwoo Song ◽

Jae-Kwan Hwang

Keyword(s):

High Fat Diet ◽

Interleukin 1 ◽

Liver Fat ◽

Postprandial Blood Glucose ◽

Obese Mice ◽

High Fat ◽

Necrosis Factor Alpha ◽

Glucose Levels ◽

Anticancer Properties ◽

Anti Inflammatory

Xanthorrhizol, a natural compound isolated fromCurcuma xanthorrhizaRoxb. (Java turmeric), has been reported to possess antioxidant and anticancer properties; however, its effects on metabolic disorders remain unknown. The aim of the present study was to evaluate the effects of xanthorrhizol (XAN) andC. xanthorrhizaextract (CXE) with standardized XAN on hyperglycemia and inflammatory markers in high-fat diet- (HFD-) induced obese mice. Treatment with XAN (10 or 25 mg/kg/day) or CXE (50 or 100 mg/kg/day) significantly decreased fasting and postprandial blood glucose levels in HFD-induced obese mice. XAN and CXE treatments also lowered insulin, glucose, free fatty acid (FFA), and triglyceride (TG) levels in serum. Epididymal fat pad and adipocyte size were decreased by high doses of XAN (26.6% and 20.1%) and CXE (25.8% and 22.5%), respectively. XAN and CXE treatment also suppressed the development of fatty liver by decreasing liver fat accumulation. Moreover, XAN and CXE significantly inhibited production of inflammatory cytokines, such as tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), interleukin-1β(IL-1β), and C-reactive protein (CRP) in adipose tissue (27.8–82.7%), liver (43.9–84.7%), and muscle (65.2–92.5%). Overall, these results suggest that XAN and CXE, with their antihyperglycemic and anti-inflammatory activities, might be used as potent antidiabetic agents for the treatment of type 2 diabetes.

Download Full-text

Carbonyl Reductase 1 Overexpression in Adipose Amplifies Local Glucocorticoid Action and Impairs Glucose Tolerance in Lean Mice

Journal of the Endocrine Society ◽

10.1210/jendso/bvab048.1639 ◽

2021 ◽

Vol 5 (Supplement_1) ◽

pp. A806-A806

Author(s):

Rachel Bell ◽

Elisa Villalobos ◽

Mark Nixon ◽

Allende Miguelez-Crespo ◽

Matthew Sharp ◽

...

Keyword(s):

Adipose Tissue ◽

Glucose Tolerance ◽

Fat Mass ◽

High Fat Diet ◽

Fasting Glucose ◽

High Fat ◽

Male And Female ◽

Over Expression ◽

Female Mice ◽

Diet Induced Obesity

Abstract Glucocorticoids play a critical role in metabolic homeostasis. Chronic or excessive activation of the glucocorticoid receptor (GR) in adipose tissue contributes to metabolic disorders such as glucose intolerance and insulin resistance. Steroid-metabolising enzymes in adipose, such as 11β-HSD1 or 5α-reductase, modulate the activation of GR by converting primary glucocorticoids into more or less potent ligands. Carbonyl reductase 1 (CBR1) is a novel regulator of glucocorticoid metabolism, converting corticosterone/cortisol to 20β-dihydrocorticosterone/cortisol (20β-DHB/F); a metabolite which retains GR activity. CBR1 is abundant in adipose tissue and increased in obese adipose of mice and humans1 and increased Cbr1 expression is associated with increased fasting glucose1. We hypothesised that increased Cbr1/20β-DHB in obese adipose contributes to excessive GR activation and worsens glucose tolerance. We generated a novel murine model of adipose-specific Cbr1 over-expression (R26-Cbr1Adpq) by crossing conditional knock-in mice with Adiponectin-Cre mice. CBR1 protein and activity were doubled in subcutaneous adipose tissue of male and female R26-Cbr1Adpq mice compared with floxed controls; corresponding to a two-fold increase 20β-DHB (1.6 vs. 4.2ng/g adipose; P=0.0003; n=5-7/group). There were no differences in plasma 20β-DHB or corticosterone. Bodyweight, lean or fat mass, did not differ between male or female R26-Cbr1Adpq mice and floxed controls. Lean male R26-Cbr1Adpq mice had higher fasting glucose (9.5±0.3 vs. 8.4±0.3mmol/L; P=0.04) and worsened glucose tolerance (AUC 1819±66 vs. 1392±14; P=0.03). Female R26-Cbr1Adpq mice also had a worsened glucose tolerance but fasting glucose was not altered with genotype. There were no differences in fasting insulin or non-esterified fatty acid between genotypes in either sex. Expression of GR-induced genes Pnpla2, Gilz and Per1, were increased in adipose of R26-Cbr1Adpq mice. Following high-fat diet induced obesity, no differences in bodyweight, lean or fat mass, with genotype were observed in male and female mice, and genotype differences in fasting glucose and glucose tolerance were abolished. In conclusion, adipose-specific over-expression of Cbr1 in lean male and female mice led to increased levels of 20β-DHB in adipose but not plasma, and both sexes having worsened glucose tolerance. The influence of adipose CBR1/20β-DHB on glucose tolerance was not associated with altered fat mass or bodyweight and was attenuated by high-fat diet-induced obesity. These metabolic consequences of Cbr1 manipulation require careful consideration given the wide variation in CBR1 expression in the human population, the presence of inhibitors and enhancers in many foodstuffs and the proposed use of inhibitors as an adjunct for cancer treatment regimens. Reference: Morgan et al., Scientific Reports. 2017; 7.

Download Full-text