The role of PGC-1α in brain injury: mechanisms and therapeutic potential

Brain injury remains a significant contributor to mortality and long-term neurological disability worldwide, despite ongoing research efforts to develop effective therapies that can mitigate secondary damage. One promising therapeutic target is peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), a crucial regulator of mitochondrial homeostasis, antioxidant defense, and metabolic adaptation. This review explores the multifaceted roles of PGC-1α in various types of brain injuries, including traumatic, ischemic, and hemorrhagic injuries. In traumatic brain injury, PGC-1α has been found to play a pivotal role in reducing mitochondrial dysfunction and neuroinflammation. By promoting oxidative phosphorylation and inhibiting microglial activation, PGC-1α helps to preserve neuronal health and function. In ischemic brain injury, PGC-1α’s ability to restore energy metabolism through fatty acid oxidation and enhance antioxidant defenses against oxidative stress is particularly noteworthy. These actions contribute to improving neuronal survival and functional recovery. Similarly, in hemorrhagic brain injury, PGC-1α has demonstrated its protective effects by regulating lipid metabolism and inflammatory cascades. This helps to alleviate blood–brain barrier disruption and iron-induced oxidative damage, which are critical factors in the pathogenesis of this type of injury. Overall, these findings highlight the broad therapeutic potential of PGC-1α in brain injury. Furthermore, recent research has focused on developing pharmacological PGC-1α activators which have shown promise in pre-clinical models by restoring mitochondrial integrity and enhancing cellular resilience. In conclusion, the diverse roles of PGC-1α in traumatic, ischemic, and hemorrhagic brain injuries, as well as its spatiotemporal regulatory mechanisms, provide valuable insights into its therapeutic potential. As research continues to advance, PGC-1α-based strategies hold promise as innovative therapeutic approaches for brain injury, offering new hope for patients worldwide.