This is how high fat diets can suppress enzymes in immune cells and promote fat tissue inflammation

When a fat diet floods the body with too much fat, it causes a problem inside specialized immune cells. However, this problem turns off an enzyme that these cells need to stay healthy. As a result, fat tissue becomes inflamed, and the chance of developing diabetes goes up in mice.

Protectors of Metabolic Balance
At the heart of this issue are cells called group 2 innate lymphoid cells or ILC2s. These cells live quietly in tissue and act like guardians. They work behind the scenes to keep metabolism steady and stop inflammation. Scientists from the University of Bonn and University Hospital Bonn have discovered the metabolic switch that causes these protective cells to fail. The switch is an enzyme called acetyl-CoA carboxylase 1 , or ACC1 as mentioned in the Medical Express.

In healthy conditions ILC2s use free fatty acids to build their cell membranes and fuel their growth. When there is not enough outside fat ACC1 kicks in to help make long-chain fatty acids from scratch. Making fat inside the cell keeps ILC2s energized and strong in environments rich with lipids.

How Fat Drains Cellular Energy

A high-fat diet breaks this natural balance. When fat builds up in the tissue the body tries to save energy by shutting off ACC1. This suppression of production makes sense for overall energy storage but it accidentally cuts off an important energy source inside ILC2 cells.

Without ACC1 the transport system that moves molecules across the inner mitochondrial membrane stops working. This breakdown shuts down the cell’s power plants. ILC2s lose energy. Can no longer function properly. They begin to weaken and die. Once these key immune cells are gone the body loses its defense against swelling in tissue. Chronic inflammation sets in which can lead to insulin resistance and diabetes.

Why Some Weight-Loss Treatments Fail

These findings help explain why some obesity treatments don’t work well in trials. Drugs that block enzymes, like ACC1 might reduce production, but they also disable the immune cells that are needed to fight tissue inflammation. Protecting metabolic health means designing treatments that consider the energy needs of cells. It’s not enough to target metabolic pathways alone. We need therapies that support the system as mentioned in the Medical Express.