A research team from Chonnam National University Medical School, Republic of Korea, discovered a new role of Ret finger protein (RFP) in driving fat cell formation and metabolism. 

They found that mice lacking RFP resisted weight gain and had better metabolic profile even on a high-fat diet— highlighting RFP as a promising target for obesity and related metabolic diseases. 

In the long run, the researchers envision innovative RFP-targeted therapies that not only improve weight regulation but also mitigate metabolic complications. 

While RFP was previously only known for its role in genetic regulation and skeletal muscle differentiation, its involvement in fat metabolism was unknown until now. 

In their new study, the researchers demonstrate how RFP plays a central role in adipogenesis, a process through which precursor cells mature into fat-storing cells (adipocytes). The findings were published in the journal Experimental & Molecular Medicine. 

“We discovered that RFP behaves like a hidden accelerator for obesity,” explained Professor Kook. “When RFP levels are high, fat cells form and expand much more easily, and when RFP is absent, the body resists weight gain, even under a high-fat diet.” 

The effect of RFP was demonstrated using mice models and various cell culture tests. When mice lacking RFP were fed a high-fat diet, they showed dramatic protection against diet-induced obesity.  

While normal mice turned obese under the diet, the RFP-deficient mice gained significantly less weight, accumulated far less fat, and maintained smaller adipocytes, despite identical high-fat feeding.  

Additionally, the RFP-deficient mice also showed improved glucose tolerance, enhanced insulin sensitivity, and lower circulating lipids, suggesting broader metabolic benefits. 

Notably, the researchers also confirmed the relevance of this effect in humans. The RFP expression was found to be elevated even in human adipose tissue obtained from the abdomen of obese individuals.  

Diana Turner, Deputy Editor, DDW