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Updated: May 10, 2026
14:32
Deacetylation Assays to Unravel the Interplay between Sirtuins (SIRT2) and Specific Protein-substrates
Published on: February 27, 2016
Sirtuin-1 is a nutrient-dependent modulator of inflammation
Maya E Kotas1, Michelle C Gorecki, Matthew P Gillum
1Department of Immunobiology; Yale University School of Medicine; New Haven, CT USA.
Adipocyte
|June 28, 2013
Summary
Suppression of sirtuin-1 (SirT1) during overnutrition links nutrient sensing to inflammation. Reduced SirT1 in obesity promotes metabolic inflammation, highlighting its role in energy balance and immune response.
Area of Science:
- Metabolic inflammation
- Nutrient sensing pathways
- Cellular energy homeostasis
Background:
- Obesity and its comorbidities involve inflammation, but the link between nutrient sensing and inflammation is unclear.
- Sirtuin-1 (SirT1), activated by energy depletion, regulates fasting response and inflammation.
- SirT1 is suppressed in obesity, and its reduction in adipocytes and macrophages causes inflammation.
Purpose of the Study:
- Investigate the role of SirT1 suppression in diet-induced obesity and macrophages.
- Elucidate the mechanism linking nutrient status, SirT1, and inflammatory signaling.
Main Methods:
- Examined SirT1 mRNA and protein expression in obese rodent and human white adipose tissue.
- Experimentally reduced SirT1 in adipocytes and macrophages.
- Analyzed SirT1's effects on NFκB deacetylation and inflammatory gene promoter remodeling.
Main Results:
- SirT1 expression is suppressed in diet-induced obese macrophages.
- Experimental SirT1 reduction in adipocytes and macrophages mimics obesity-associated inflammation.
- SirT1 directly deacetylates NFκB and remodels chromatin at inflammatory gene promoters.
Conclusions:
- SirT1 suppression in macrophages during obesity contributes to metabolic inflammation.
- SirT1 acts as a crucial sensor of nutrient status, modulating inflammatory signaling.
- Targeting SirT1 may offer therapeutic strategies for obesity-related inflammatory conditions.
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