Rats, Zucker

Publication Title: 
Toxicology and Applied Pharmacology

Salacia oblonga (SO) root is an Ayurvedic medicine with anti-diabetic and anti-obese properties. Peroxisome proliferator-activated receptor (PPAR)-alpha, a nuclear receptor, plays an important role in maintaining the homeostasis of lipid metabolism.

Author(s): 
Huang, Tom Hsun-Wei
Peng, Gang
Li, George Qian
Yamahara, Johji
Roufogalis, Basil D.
Li, Yuhao
Publication Title: 
Toxicology and Applied Pharmacology

Excess cardiac triglyceride accumulation in diabetes and obesity induces lipotoxicity, which predisposes the myocytes to death. On the other hand, increased cardiac fatty acid (FA) oxidation plays a role in the development of myocardial dysfunction in diabetes. PPAR-alpha plays an important role in maintaining homeostasis of lipid metabolism.

Author(s): 
Huang, Tom Hsun-Wei
Yang, Qinglin
Harada, Masaki
Uberai, Jasna
Radford, Jane
Li, George Q.
Yamahara, Johji
Roufogalis, Basil D.
Li, Yuhao
Publication Title: 
Diabetes, Obesity & Metabolism

AIMS: We investigated the effect of the water extract of Salacia oblonga (SOE), an ayurvedic antidiabetic and antiobesity medicine, on obesity and diabetes-associated cardiac hypertrophy and discuss the role of modulation of cardiac angiotensin II type 1 receptor (AT(1)) expression in the effect. METHODS: SOE (100 mg/kg) was given orally to male Zucker diabetic fatty (ZDF) rats for 7 weeks. At the end-point of the treatment, the hearts and left ventricles were weighed, cardiomyocyte cross-sectional areas were measured, and cardiac gene profiles were analysed.

Author(s): 
Huang, T. H.
He, L.
Qin, Q.
Yang, Q.
Peng, G.
Harada, M.
Qi, Y.
Yamahara, J.
Roufogalis, B. D.
Li, Y.
Publication Title: 
Journal of Complementary & Integrative Medicine

The aim of this study is to evaluate the antidiabetic activity of two Indian Ayurvedic herbs using an oral glucose tolerance test and blood insulin levels to understand the mechanism of action using the Zucker diabetic rat model. Herbal extracts of Wrightia tinctoria and Parthenocissus quinquefolia at a dose of (250 mg/kg body weight) were used throughout the study. Following a glucose challenge of 2 gm/kg using oral gavage, a timed glucose tolerance test was used to determine the ability of these extracts to alter glucose levels in diabetic animal model.

Author(s): 
Kumar, Sunil
Kunaparaju, Naveen
Zito, S. William
Barletta, Michael A.
Publication Title: 
American Journal of Physiology. Regulatory, Integrative and Comparative Physiology

The prevalence of type 2 diabetes (T2DM) is increasing, creating a need for T2DM animal models for the study of disease pathogenesis, prevention, and treatment. The purpose of this project was to develop a rat model of T2DM that more closely models the pathophysiology of T2DM in humans. The model was created by crossing obese Sprague-Dawley rats with insulin resistance resulting from polygenic adult-onset obesity with Zucker diabetic fatty-lean rats that have a defect in pancreatic beta-cell function but normal leptin signaling.

Author(s): 
Cummings, Bethany P.
Digitale, Erin K.
Stanhope, Kimber L.
Graham, James L.
Baskin, Denis G.
Reed, Benjamin J.
Sweet, Ian R.
Griffen, Steven C.
Havel, Peter J.
Publication Title: 
American Journal of Physiology. Endocrinology and Metabolism

Inclusion of HIV protease inhibitors (PIs) in the treatment of people living with HIV+ has markedly decreased mortality but also increased the incidence of metabolic abnormalities, causes of which are not well understood. Here, we report that insulinopenia is exacerbated when Zucker fa/fa rats are exposed to a PI for 7 wk, suggesting that chronic PI exposure adversely affects pancreatic islet beta-cell function.

Author(s): 
Zhang, Sheng
Carper, Michael J.
Lei, Xiaoyong
Cade, W. Todd
Yarasheski, Kevin E.
Ramanadham, Sasanka
Publication Title: 
Archives of Biochemistry and Biophysics

Elevated blood triacylglycerol (TG) is a significant contributing factor to the current epidemic of obesity-related health disorders, including type-2 diabetes, nonalcoholic fatty liver disease, and cardiovascular disease. The observation that mice lacking the enzyme sn-glycerol-3-phosphate acyltransferase are protected from insulin resistance suggests the possibility that the regulation of TG synthesis be a target for therapy. Five-week-old Zucker Diabetic Fatty (ZDF) rats were fed a diet containing (R)-alpha-lipoic acid (LA, approximately 200mg/kg body weight per day) for 5 weeks.

Author(s): 
Butler, Judy A.
Hagen, Tory M.
Moreau, Régis
Publication Title: 
American Journal of Physiology. Regulatory, Integrative and Comparative Physiology

Sustained fructose consumption has been shown to induce insulin resistance and glucose intolerance, in part, by promoting oxidative stress. Alpha-lipoic acid (LA) is an antioxidant with insulin-sensitizing activity. The effect of sustained fructose consumption (20% of energy) on the development of T2DM and the effects of daily LA supplementation in fructose-fed University of California, Davis-Type 2 diabetes mellitus (UCD-T2DM) rats, a model of polygenic obese T2DM, was investigated.

Author(s): 
Cummings, Bethany P.
Stanhope, Kimber L.
Graham, James L.
Evans, Joseph L.
Baskin, Denis G.
Griffen, Steven C.
Havel, Peter J.
Publication Title: 
Journal of Oral Pathology & Medicine: Official Publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology

BACKGROUND: Obesity is a prevalent disorder characterized as marked insulin resistance and low grade inflammation. We tested the hypothesis that obesity upregulates inflammatory markers in the submandibular gland in association with derangements of its architecture and pre-disposition to caries in obese Zucker rats (OZR). We also examined the potential impact of chromium picolinate (Cr(Pic)3), a nutritional supplement suggested to improve glycemic control, on the aforementioned parameters.

Author(s): 
Mozaffari, Mahmood S.
Abdelsayed, Rafik
Zakhary, Ibrahim
El-Salanty, Mohammed
Liu, Jun Yao
Wimborne, Hereward
El-Marakby, Ahmed
Publication Title: 
Journal of Proteome Research

This study reports for the first time qualitative and quantitative differences in carbonylated proteins shed into blood as a function of increasing levels of OS. Carbonylated proteins in freshly drawn blood from pairs of diabetic and lean rats were derivatized with biotin hydrazide, dialyzed, and enriched with avidin affinity chromatography. Proteins thus selected were used in several ways.

Author(s): 
Madian, Ashraf G.
Myracle, Angela D.
Diaz-Maldonado, Naomi
Rochelle, Nishi S.
Janle, Elsa M.
Regnier, Fred E.

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