Development of an adipocyte differentiation protocol using 3T3-L1 cells for the investigation of the browning process: identification of the PPAR-γ agonist rosiglitazone as a browning reference drug

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Background Obesity is a metabolic disease that is characterized by an excessive accumulation of adipose tissue (AT) and is often associated with other pathologies. AT is a lipid storage organ with endocrine functions that presents two main phenotypes: white adipose tissue (WAT) and brown adipose tissue (BAT). Preadipocytes or mature white adipocyte cells can differentiate in a middle phenotype with morpho/functional characteristics between WAT and BAT, known as brown-like or beige adipose tissue (BeAT), through the browning process. Considering the interest in stimulating the browning process in metabolic disorders and the lack of clarity, evenness, and reproducibility of the preclinical models, the detailed description of an adipocyte differentiation protocol and the " de novo " development of a beige adipocyte phenotype has been described. Furthermore, the most described stimuli in inducing the browning process, such as PPAR-γ agonists (using rosiglitazone, RGZ) and β-adrenergic stimulators (using isoproterenol, ISO), were evaluated in order to describe their involvement in the browning process and identify a reference compound for the induction of the " de novo " browning. Methods Immortalized murine embryonic fibroblasts (3T3-L1) cells were differentiated for up to 17 days using a differentiation medium (DM) and a maintenance medium (MM) with or without RGZ or ISO to obtain

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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