Leigh Syndrome
https://www.sciencedirect.com/science/article/pii/S2213231726001643
This study explores how problems in mitochondria—the cell’s main energy producers—affect another organelle called the peroxisome, which also helps break down fats. The researchers used cells lacking NDUFS4, a key part of mitochondrial complex I. Without this protein, mitochondria cannot properly burn fatty acids, causing the cells to accumulate excess fat. Normally, peroxisomes help process very‑long‑chain fatty acids, especially when mitochondria are stressed. In these NDUFS4‑deficient cells, peroxisomes increased in number, suggesting the cell was trying to compensate. However, the new peroxisomes were not fully functional. Key enzymes needed for fat breakdown were reduced, meaning the peroxisomes could not effectively handle the overload. As a result, fats build up inside the cell, lipid droplets enlarge, and both organelles become stressed. The study proposes that healthy communication between mitochondria, peroxisomes, and lipid droplets is essential for managing metabolic stress. When this coordination breaks down, cells become vulnerable to lipid imbalance, which may contribute to diseases like Leigh syndrome. This is an important finding and provides a therapeutic target for future research to potentially reduce lipid stress in mitochondrial disorders.