A low-protein, high-carbohydrate diet increases browning in perirenal adipose tissue but not in inguinal adipose tissue
| Autor: | Amílcar Sabino Damazo, Nair Honda Kawashita, Valéria Ernestânia Chaves, Laís A.A. Ferreira, Mayara Peron Pereira, Flávia H.S. da Silva, Marcelo A. Christoffolete, Andreas D. Flouris, Suélem Aparecida de França, George S. Metsios |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Male
0301 basic medicine medicine.medical_specialty Low protein FGF21 Endocrinology Diabetes and Metabolism Fluorescent Antibody Technique Inguinal Canal Adipose tissue 030209 endocrinology & metabolism White adipose tissue Biology Kidney 03 medical and health sciences 0302 clinical medicine Adipose Tissue Brown Internal medicine Diet Protein-Restricted Dietary Carbohydrates Glyceroneogenesis medicine Animals Lipolysis Rats Wistar Lipoprotein lipase Nutrition and Dietetics Thermogenin Diet Rats Fibroblast Growth Factors 030104 developmental biology Endocrinology Models Animal |
| Zdroj: | Nutrition. 42:37-45 |
| ISSN: | 0899-9007 |
| Popis: | Objective The aim of this study was to evaluate the browning and origin of fatty acids (FAs) in the maintenance of triacylglycerol (TG) storage and/or as fuel for thermogenesis in perirenal adipose tissue (periWAT) and inguinal adipose tissue (ingWAT) of rats fed a low-protein, high-carbohydrate (LPHC) diet. Methods LPHC (6% protein, 74% carbohydrate) or control (C; 17% protein, 63% carbohydrate) diets were administered to rats for 15 d. The tissues were stained with hematoxylin and eosin for histologic analysis. The content of uncoupling protein 1 (UCP1) was determined by immunofluorescence. Levels of T-box transcription factor (TBX1), PR domain containing 16 (PRDM16), adipose triacylglycerol lipase (ATGL), hormone-sensitive lipase, lipoprotein lipase (LPL), glycerokinase, phosphoenolpyruvate carboxykinase (PEPCK), glucose transporter 4, β 3 -adrenergic receptor (AR), β 1 -AR, protein kinase A (PKA), adenosine-monophosphate-activated protein kinase (AMPK), and phospho-AMPK were determined by immunoblotting. Serum fibroblast growth factor 21 (FGF21) was measured using a commercial kit (Student's t tests, P Results The LPHC diet increased FGF21 levels by 150-fold. The presence of multilocular adipocytes, combined with the increased contents of UCP1, TBX1, and PRDM16 in periWAT of LPHC-fed rats, suggested the occurrence of browning. The contents of β 1 -AR and LPL were increased in the periWAT. The ingWAT showed higher ATGL and PEPCK levels, phospho-AMPK/AMPK ratio, and reduced β 3 -AR and PKA levels. Conclusion These findings suggest that browning occurred only in the periWAT and that higher utilization of FAs from blood lipoproteins acted as fuel for thermogenesis. Increased glycerol 3-phosphate generation by glyceroneogenesis increased FAs reesterification from lipolysis, explaining the increased TG storage in the ingWAT. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect