Researchers have identified a protein called MTCH2, or “Mitch,” that regulates how human cells process fat and energy, potentially offering a new target for future obesity treatments. According to a 2025 study published in the EMBO Journal, disabling this protein in human cells forces them to burn more fuel and inhibits the formation of new fat-storing cells.
How does MTCH2 influence body fat?
The protein MTCH2 acts as a regulator for mitochondria, the structures within cells responsible for converting nutrients into energy. Research led by Prof. Atan Gross at the Weizmann Institute of Science found that MTCH2 helps maintain the connected networks of mitochondria required for efficient energy storage. When the protein is removed, these networks disassemble. According to the study, this forces cells to enter a “hypermetabolic state,” where they consume more glucose, fats, and amino acids to maintain function.
Mitochondria are not static. They constantly merge and split depending on the energy needs of the cell. When they form larger networks, they generally produce energy more efficiently than when they are broken into smaller fragments.
What happened when MTCH2 was removed in tests?
In experiments involving mouse muscle, the removal of MTCH2 resulted in rodents that appeared resistant to obesity, even when consuming large amounts of food. Doctoral student Sabita Chourasia, who led the human cell experiments for the 2025 study, noted that the team observed an increase in cellular respiration—the process of producing energy from nutrients—every few hours following the deletion of the protein.
Furthermore, the researchers found that precursor cells—which typically mature into fat cells—struggled to build lipid droplets when MTCH2 was absent. Instead of storing energy as fat, these cells appeared to burn it to meet their metabolic demands.
Why can’t we use this for weight loss yet?
While the findings suggest a potential pathway for managing obesity, the research remains in early stages. Prof. Gross emphasized that MTCH2 plays multiple roles in the body, including the regulation of cell death and development. Disabling the protein creates an “oxidized cellular environment,” which could be harmful if applied to living tissue without precision. Current obesity treatments, such as Ozempic or Wegovy, have transformed care but often lead to the loss of lean muscle mass; the challenge for future drugs is to target fat metabolism without inducing dangerous levels of cellular stress.
Focusing on metabolic health involves more than just weight loss. Future therapies are aiming to preserve muscle strength and function, which are often compromised by rapid fat loss.
Frequently Asked Questions
What is the role of MTCH2 in the body?
MTCH2 helps maintain mitochondrial networks. It influences whether a cell preserves fat for storage or burns it for fuel.
Can deleting MTCH2 prevent obesity?
In lab studies on mice and human cells, removing MTCH2 increased fat burning and reduced the formation of new fat cells. However, it is not currently a human treatment.
Why is muscle preservation important in weight loss?
Current weight-loss drugs can sometimes cause the loss of lean muscle mass. Researchers are looking for ways to reduce fat while maintaining metabolic function and strength.
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