Pramipexole alleviates traumatic brain injury in rats through inhibiting necroptosis.

Traumatic brain injury (TBI) has high morbidity, mortality and disability. Cell death runs through its occurrence and development. Necroptosis is a recently discovered mode of cell death. Its mechanism still has not been fully resolved. Studies which researcher published before showed that: pramipexole could play a neuroprotective role by inducing hypothermia; receptor interacting protein 1 (RIP1) could play a neuroprotective role by regulating necroptosis. On this basis, we carried out the experiments and it was observed that we could establish a hypothermia model of SD rats safely and effectively via pramipexole. Meanwhile, necroptosis and expression of RIP1 and its related proteins did change. As a result, the prognosis of TBI rats did improve. In brief, we found that pramipexole could play a protective role after TBI by inhibiting necroptosis. We hope our investigation would provide new theoretical basis to improve the outcome of clinical TBI patients.