Diabetes (New York, N.Y.), 2020-03, Vol.69 (3), p.300-312
2020
Details
- Autor(en) / Beteiligte
- Titel
- Lipokine 5-PAHSA Is Regulated by Adipose Triglyceride Lipase and Primes Adipocytes for De Novo Lipogenesis in Mice
- Ist Teil von
- Diabetes (New York, N.Y.), 2020-03, Vol.69 (3), p.300-312
- Ort / Verlag
- United States: American Diabetes Association
- Erscheinungsjahr
- 2020
- Link zum Volltext
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Branched esters of palmitic acid and hydroxystearic acid (PAHSA) are anti-inflammatory and antidiabetic lipokines that connect glucose and lipid metabolism. We aimed to characterize involvement of the 5-PAHSA regioisomer in the adaptive metabolic response of white adipose tissue (WAT) to cold exposure (CE) in mice, exploring the cross talk between glucose utilization and lipid metabolism. CE promoted local production of 5- and 9-PAHSAs in WAT. Metabolic labeling of de novo lipogenesis (DNL) using H O revealed that 5-PAHSA potentiated the effects of CE and stimulated triacylglycerol (TAG)/fatty acid (FA) cycling in WAT through impacting lipogenesis and lipolysis. Adipocyte lipolytic products were altered by 5-PAHSA through selective FA re-esterification. The impaired lipolysis in global adipose triglyceride lipase (ATGL) knockout mice reduced free PAHSA levels and uncovered a metabolite reservoir of TAG-bound PAHSAs (TAG estolides) in WAT. Utilization of C isotope tracers and dynamic metabolomics documented that 5-PAHSA primes adipocytes for glucose metabolism in a different way from insulin, promoting DNL and impeding TAG synthesis. In summary, our data reveal new cellular and physiological mechanisms underlying the beneficial effects of 5-PAHSA and its relation to insulin action in adipocytes and independently confirm a PAHSA metabolite reservoir linked to ATGL-mediated lipolysis.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0012-1797eISSN: 1939-327XDOI: 10.2337/db19-0494Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_7118252
- Format
- –
- Schlagworte
- Adipocytes, Adipocytes - metabolism, Adipose tissue, Adipose Tissue, White - metabolism, Animals, Antidiabetics, Carbon Isotopes, Cold Temperature, Deuterium Oxide, Diabetes, Diabetes mellitus, Esterification, Esters, Fatty Acids - metabolism, Glucose, Glucose - metabolism, Inflammation, Insulin, Life Sciences, Lipase, Lipase - genetics, Lipase - metabolism, Lipid metabolism, Lipogenesis, Lipogenesis - genetics, Lipolysis, Metabolic response, Metabolism, Metabolites, Metabolomics, Mice, Mice, Knockout, Palmitic acid, Palmitic Acid - metabolism, Stearic Acids - metabolism, Tracers, Triglycerides - metabolism