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Usage Information

Increased apoptosis and browning of TAK1-deficient adipocytes protects against obesity
Antonia Sassmann-Schweda, … , Nina Wettschureck, Stefan Offermanns
Antonia Sassmann-Schweda, … , Nina Wettschureck, Stefan Offermanns
Published May 19, 2016
Citation Information: JCI Insight. 2016;1(7):e81175. https://doi.org/10.1172/jci.insight.81175.
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Research Article Endocrinology Metabolism

Increased apoptosis and browning of TAK1-deficient adipocytes protects against obesity

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Abstract

Obesity is an increasing health problem worldwide, and nonsurgical strategies to treat obesity have remained rather inefficient. We here show that acute loss of TGF-β–activated kinase 1 (TAK1) in adipocytes results in an increased rate of apoptotic adipocyte death and increased numbers of M2 macrophages in white adipose tissue. Mice with adipocyte-specific TAK1 deficiency have reduced adipocyte numbers and are resistant to obesity induced by a high-fat diet or leptin deficiency. In addition, adipocyte-specific TAK1-deficient mice under a high-fat diet showed increased energy expenditure, which was accompanied by enhanced expression of the uncoupling protein UCP1. Interestingly, acute induction of adipocyte-specific TAK1 deficiency in mice already under a high-fat diet was able to stop further weight gain and improved glucose tolerance. Thus, loss of TAK1 in adipocytes reduces the total number of adipocytes, increases browning of white adipose tissue, and may be an attractive strategy to treat obesity, obesity-dependent diabetes, and other associated complications.

Authors

Antonia Sassmann-Schweda, Pratibha Singh, Cong Tang, Astrid Wietelmann, Nina Wettschureck, Stefan Offermanns

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