Obesity is the most well-known risk factor for the development of type 2 diabetes and insulin resistance. It has been reported that adipose tissues function as a reservoir of excessive energy. They also secrete adipokines that regulate physiological a...
Obesity is the most well-known risk factor for the development of type 2 diabetes and insulin resistance. It has been reported that adipose tissues function as a reservoir of excessive energy. They also secrete adipokines that regulate physiological and pathological events involving energy metabolism, insulin sensitivity, atherosclerosis and inflammatory responses. Small ubiquitin-like modifier (SUMO) protein is covalently linked to lysine residue of the target proteins. Sumoylation is a reversible process and deconjugation of SUMO from the target proteins is performed by several specific proteases called SENPs. Although there are several SENPs identified, little is known about the specific function of each SENP. Here, I investigated whether SENP2 regulates physiological function of adipocytes. I generated adenovirus harvoring SENP2 expression system. SENP2 overexpression in fully differentiated 3T3-L1 adipocytes by infection of Ad-hSENP2 was confirmed by western blot. SENP2 overexpression increased glucose uptake and affected the expression of CideA. The promoter activity of CideA was significantly enhanced by both co-transfection of ERRα and PGC-1α . SENP2 with ERRα and PGC-1α additionally increased the CideA promoter activity. These data suggest that increase of CiedA expression by SENP2 might be related to ERRα and PGC-1α desumylation.