Green tea improves the metabolism of peripheral tissues in β3-adrenergic receptor-knockout mice. 2020

Celso Pereira Batista Sousa-Filho, and Hector Oreliana Fernandes Faria, and Juliana Carvalho Esposito, and Alessandra Melo, and Miriam Oliveira Ribeiro, and Rosemari Otton
Interdisciplinary Post-graduate Programme in Health Sciences, Cruzeiro do Sul University, São Paulo, Brazil.

Our goal was to establish the requirement of β3 adrenoceptor (β3Adr) for green tea (GT) effects on the energy metabolism of obese mice. This study was carried out in wild-type (WT) and β3Adr knockout (KO) male mice fed with a standard diet or a high-fat diet (HFD/16 weeks) treated or not with GT (0.5 g/kg of body weight (BW)/12 weeks). GT-treatment attenuated final BW, BW gain, and adiposity index increased by HFD, improving insulin resistance (IR) and FGF21 level, without changing the food intake of WT mice. GT-treatment of β3AdrKO mice attenuated only IR, denoting GT-effects independent of β3Adr. We observed increased lipolysis accompanied by decreased adipocyte size in white adipose tissue (WAT) as well as browning of the subcutaneous WAT induced by GT in a way dependent on β3Adr. In brown adipose tissue (BAT) mRNA levels of lipolytic/oxidative genes, including β3Adr/Ucp1 and energy expenditure (EE) was increased by GT dependent on β3Adr. GT-treatment increased adiponectin independent of β3Adr. Also, independent of β3Adr pathway GT promoted an increase in β2Adr/Ucp1 mRNA levels and EE in BAT whereas; in the liver, GT has a dual role in increasing lipid synthesis and oxidation. These data lead us to suggest that GT uses β3Adr pathway activation to achieve some of its beneficial health effects.

UI MeSH Term Description Entries
D008066 Lipolysis The metabolic process of breaking down LIPIDS to release FREE FATTY ACIDS, the major oxidative fuel for the body. Lipolysis may involve dietary lipids in the DIGESTIVE TRACT, circulating lipids in the BLOOD, and stored lipids in the ADIPOSE TISSUE or the LIVER. A number of enzymes are involved in such lipid hydrolysis, such as LIPASE and LIPOPROTEIN LIPASE from various tissues. Lipolyses
D008297 Male Males
D009765 Obesity A status with BODY WEIGHT that is grossly above the recommended standards, usually due to accumulation of excess FATS in the body. The standards may vary with age, sex, genetic or cultural background. In the BODY MASS INDEX, a BMI greater than 30.0 kg/m2 is considered obese, and a BMI greater than 40.0 kg/m2 is considered morbidly obese (MORBID OBESITY).
D010936 Plant Extracts Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard. Herbal Medicines,Plant Extract,Extract, Plant,Extracts, Plant,Medicines, Herbal
D002001 Adipose Tissue, Brown A thermogenic form of adipose tissue composed of BROWN ADIPOCYTES. It is found in newborns of many species including humans, and in hibernating mammals. Brown fat is richly vascularized, innervated, and densely packed with MITOCHONDRIA which can generate heat directly from the stored lipids. Brown Fat,Hibernating Gland,Brown Adipose Tissue,Fat, Brown,Tissue, Brown Adipose
D004195 Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases. Animal Disease Model,Animal Disease Models,Disease Model, Animal
D004734 Energy Metabolism The chemical reactions involved in the production and utilization of various forms of energy in cells. Bioenergetics,Energy Expenditure,Bioenergetic,Energy Expenditures,Energy Metabolisms,Expenditure, Energy,Expenditures, Energy,Metabolism, Energy,Metabolisms, Energy
D000071256 Uncoupling Protein 1 A mitochondrial uncoupling protein that is expressed in BROWN ADIPOSE TISSUE. It is critical for NONSHIVERING THERMOGENESIS to prevent heat loss in NEONATES. BAT Uncoupling Protein,Brown Adipose Tissue Uncoupling Protein,Mitochondrial Brown Fat Uncoupling Protein 1,Mitochondrial Uncoupling Protein,SLC25A7 Protein,Solute Carrier Family 25 Member 7,Thermogenin,UCP1 Protein,Uncoupling Protein 1a,Uncoupling Protein, Mitochondrial Membrane,Uncoupling Protein, BAT,Uncoupling Protein, Mitochondrial
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015430 Weight Gain Increase in BODY WEIGHT over existing weight. Gain, Weight,Gains, Weight,Weight Gains

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