Brown adipocyte fatty acid synthase (FASN) deficiency protects mice from alcohol-induced elevations in plasma triglyceride and hepatic steatosis

Alcohol consumption is often linked to high levels of triglycerides in the blood, which can lead to serious health problems like pancreatitis and heart disease. VLDL receptors (VLDLR) help remove fatty substances from the blood, and brown fat plays a key role in removing these substances during cold exposure. Researchers have discovered that a protein called FASN in brown fat is important for controlling how excess alcohol affects triglyceride levels and fat buildup in the liver.

To find out more, scientists created mice without FASN in their brown fat (FASNBKO) and gave them both binge and single, long-term alcohol drinks. They saw that these mice handled alcohol better because their brown fat was more active at burning fat and removing VLDL particles, which lowered their blood triglyceride levels. When the researchers used a medicine to block FASN in specific brown fat cells, it also improved the mice's ability to handle alcohol and protect their livers from fat buildup.

This fat buildup was reduced due to higher activity of a protein called AMP-activated protein kinase and increased breakdown of fat in the liver.

The results show that brown fat cells with normal FASN levels help control how the body deals with extra alcohol, and boosting this fat burning process in brown fat might be a new way to help people who drink too much and develop high blood fat levels or liver problems.