Elevated Mitochondrial Superoxide Promotes Longevity Through A Mitochondria-To-Nucleus Kinase Signaling Pathway
Our bodies’ cells contain tiny powerhouses called mitochondria, which are responsible for generating energy. During this process, they produce molecules known as reactive oxygen species, or ROS, one of which is superoxide. While high levels of superoxide are generally considered harmful and can damage cells, new research reveals a surprising twist: a mild increase in mitochondrial superoxide can actually lead to a longer lifespan in different organisms.
This beneficial effect isn’t random; it’s orchestrated by a sophisticated communication system within the cell. The mitochondria send signals to the cell’s control center, the nucleus, influencing which genes are turned on or off. This “mitochondria-to-nucleus signaling pathway” is crucial for extending life.
Scientists have identified specific proteins called kinases that play a vital role in this pathway. These kinases act like messengers, relaying the signal from the mitochondria to the nucleus. Interestingly, some of these kinases are already known for their roles in other important cellular functions, such as the repair and growth of nerve fibers. The research pinpoints a particular chain of these kinase messengers that is essential for the observed increase in longevity.
Source: link to paper