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Vegiopoulos, Alexandros; Müller-Decker, Karin; Strzoda, Daniela; Schmitt, Iris; Chichelnitskiy, Evgeny; Ostertag, Anke; Diaz, Mauricio Berriel; Rozman, Jan; Hrabe de Angelis, Martin; Nüsing, Rolf M; Meyer, Carola W; Wahli, Walter; Klingenspor, Martin; Herzig, Stephan
Science (American Association for the Advancement of Science), 05/2010, Letnik: 328, Številka: 5982Journal Article
Obesity results from chronic energy surplus and excess lipid storage in white adipose tissue (WAT). In contrast, brown adipose tissue (BAT) efficiently burns lipids through adaptive thermogenesis. Studying mouse models, we show that cyclooxygenase (COX)-2, a rate-limiting enzyme in prostaglandin (PG) synthesis, is a downstream effector of β-adrenergic signaling in WAT and is required for the induction of BAT in WAT depots. PG shifted the differentiation of defined mesenchymal progenitors toward a brown adipocyte phenotype. Overexpression of COX-2 in WAT induced de novo BAT recruitment in WAT, increased systemic energy expenditure, and protected mice against high-fat diet-induced obesity. Thus, COX-2 appears integral to de novo BAT recruitment, which suggests that the PG pathway regulates systemic energy homeostasis.
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