Cellular senescence and senolytic therapy in traumatic brain injuryTraumatic brain injury (TBI) is a major cause of death and long-term disability in the United States. The initial primary injury in TBI is followed by a secondary injury cascade of molecular events, which can persist for years, and contributes to neuroinflammation, neurodegeneration, and long-term functional deficits after TBI. In this review, we will discuss evidence that cellular senescence in TBI, where damaged cells enter a state of permanent cell-cycle arrest and release pro-inflammatory faDarrell W. Brann