1. A high-fat diet induced NMRI mouse model of metabolic syndrome: focus on brain-derived neurotrophic factor (BDNF)
- Author
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Shima Motamedi, Fatemeh Ranjbar, and Isaac Karimi
- Subjects
Blood Glucose ,Male ,medicine.medical_specialty ,Cholesterol, VLDL ,Gene Expression ,Mice, Inbred Strains ,030204 cardiovascular system & hematology ,Diet, High-Fat ,Biochemistry ,Mice ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,Neurotrophic factors ,Internal medicine ,Gene expression ,medicine ,Animals ,Sugar ,Triglycerides ,Metabolic Syndrome ,Brain-derived neurotrophic factor ,biology ,business.industry ,Brain-Derived Neurotrophic Factor ,Cholesterol, HDL ,digestive, oral, and skin physiology ,Brain ,nutritional and metabolic diseases ,medicine.disease ,Disease Models, Animal ,Endocrinology ,Fat diet ,biology.protein ,Diet, Atherogenic ,lipids (amino acids, peptides, and proteins) ,Neurology (clinical) ,Metabolic syndrome ,business ,030217 neurology & neurosurgery ,Lipoprotein ,Neurotrophin - Abstract
The association of brain-derived neurotrophic factor (BDNF) as a member of neurotrophin family and metabolic syndrome (MetS) has been proposed, however basic evidence necessary to prove (or disprove) this association in non-genetic animal model is rare. Therefore, we investigated the alteration of encephalic BDNF gene expression in a mouse model of high-fat diet (HFD) induced MetS. To translate MetS, male NMRI mice (9 weeks old; N = 13) fed on a HFD including suet powder (37.50%) and granulated sugar (19.85%) while control mice were fed a diet contained suet powder (6.25%) and granulated sugar (49.09%). We monitored the development of MetS by measuring fasting blood sugar (FBS) and lipid (total cholesterol (TC) and triacylglycerol (TGs)) and lipoprotein (high-density lipoprotein cholesterol (HDL-C), very low-density lipoprotein cholesterol (VLDL-C)) profiles, atherogenic index (AI), and somatic indices after 1 and 3 months of dietary interventions. The HFD intake led to increased body weight, liver weight, FBS, TC, and decreased HDL-C as compared to chow diet in mice after first month of dietary intervention. The increased FBS, body weight, abdominal fat mass, TGs, TC, and VLDL-C and decreased HDL-C were observed in HFD-fed mice as compared to those of chow-fed mice at 3th month. The statistical comparison of two HFD groups in two time intervals of 1st and 3th month confirmed that our HFD-induced MetS model was reliable because FBS, TGs and VLDL-C, TC, and AI have been increased significantly during selected time intervals. The AI increased significantly in HFD-fed mice compared to chow-fed mice after 3 months. The AI in HFD-fed mice treated with HFD for 3 months was increased significantly as compared to mice fed HFD for 1 month. Our diet-induced model more closely mimics the changes observed in human MetS and showed that encephalic BDNF gene in mice fed HFD was under-expressed by 0.30 fold with respect to chow-fed mice after 3 months of dietary intervention.
- Published
- 2018
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