Differentiation of embryonic stem cells for pharmacological studies on adipose cells.

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)

The ongoing global explosion in the incidence of obesity has focused attention on the development of adipose cells. Severe obesity is the result of an increase in fat cell size in combination with increased fat cell number. New fat cells arise from a pre-existing pool of adipose stem cells that are present irrespective of age. The development of established preadipocyte cell lines has facilitated the study of different steps leading to terminal differentiation. However, these systems are limited for studying early events of differentiation as they represent cells which are already determined for the adipogenic lineage. In vitro differentiation of mouse embryonic stem (ES) cells towards the adipogenic lineage provides an alternative source of adipocytes for study in tissue culture and offers the possibility to investigate regulation of the first steps of adipose cell development. In this review, we describe the sequential requirement of retinoic acid and PPARgamma during adipogenesis in ES cells. Stimulation of ES cells with synthetic retinoids which are selective ligands of the retinoic acid receptor isotypes allowed the investigation of the contribution of the different retinoic receptors on the RA-dependent differentiation. The effects of thiazolidinediones, a new class of pharmacological agents used for the treatment of type 2 diabetes, and of statins, drugs used in therapy

Evidence level

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

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