The Functional Interaction Between PRDM16 and the SREBP Pathway Controls Lipid Metabolism.

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)

Dysregulated lipid metabolism is associated with cardiovascular disease, obesity and type 2 diabetes. In the current report, we explore the functional interactions between two important regulators of lipid metabolism, sterol regulatory element-binding protein 1 and 2 (SREBP1/2), and PRDI-BF1 and RIZ homology domain containing 16 (PRDM16). The SREBP family of transcription factors regulate cholesterol and fatty acid synthesis and metabolism, primarily in liver but also in white adipose tissue. PRDM16 is a major regulator of brown adipose tissue (BAT) biogenesis and function as well as an inhibitor of white adipogenesis. We find that PRDM16 interacts with the nuclear forms of SREBP1/2 and inhibits their transcriptional activities. Consequently, inactivation of PRDM16 enhances the expression of well-established SREBP target genes involved in fatty acid and cholesterol synthesis/metabolism. Importantly, PRDM16 inactivation increases the expression of LDL receptor mRNA (1.6-fold) and protein (1.7-fold) and augments the cellular uptake of LDL particles (2.3-fold). Supporting these findings, PRDM16-deficient cells accumulate more neutral lipids in a SREBP1/2-dependent manner. Inactivation of PRDM16 in white and brown preadipocyte cell lines and human adipose-derived stem cells enhances the expression of SREBP target genes. In addition, the expression of adipogenic markers was increase

Evidence level

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

Browse all related research

Filter the research library by this study's title keywords, author, or publication year.