Erschienen in:
01.11.2019 | Pathogenesis of Type 2 Diabetes and Insulin Resistance (M-E Patti, Section Editor)
De Novo Lipogenesis as a Source of Second Messengers in Adipocytes
verfasst von:
Wen-Yu Hsiao, David A. Guertin
Erschienen in:
Current Diabetes Reports
|
Ausgabe 11/2019
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Abstract
Purpose of Review
Obesity is a major risk factor for type 2 diabetes. Although adipose tissue allows storage of excess calories in periods of overnutrition, in obesity, adipose tissue metabolism becomes dysregulated and can promote metabolic diseases. This review discusses recent advances in understandings how adipocyte metabolism impacts metabolic homeostasis.
Recent Findings
The ability of adipocytes to synthesize lipids from glucose is a marker of metabolic fitness, e.g., low de novo lipogenesis (DNL) in adipocytes correlates with insulin resistance in obesity. Adipocyte DNL may promote synthesis of special “insulin sensitizing” signaling lipids that act hormonally. However, each metabolic intermediate in the DNL pathway (i.e., citrate, acetyl-CoA, malonyl-CoA, and palmitate) also has second messenger functions. Mounting evidence suggests these signaling functions may also be important for maintaining healthy adipocytes.
Summary
While adipocyte DNL contributes to lipid storage, lipid precursors may have additional second messenger functions critical for maintaining adipocyte health, and thus systemic metabolic homeostasis.