Abstract: The present disclosure relates to methods and compositions for treating traumatic brain injury (TBI) and TBI-associated impairments and improving outcome in subjects that have sustained traumatic brain injury comprising administering to the subject a sgp130 or an agent that promotes the binding of sgp130 and sIL-6R and/or reduces sIL-6R mediated trans-signaling. The present disclosure also relates to methods and kits for identifying a subject that is at risk of developing a TBI-associated impairment (e.g., headache, depression, cognitive deficits, and seizure) or monitoring the responsiveness to a treatment regimen for a TBI-associated impairment in the subject, using biomarkers (e.g., white blood cells indices (e.g., Neutrophil-Lymphocyte Ratio (NLR), absolute lymphocyte counts), sIL-6R, sgp130, IL-6, sgp130:sIL-6R ratio, sIL-2Ra, IL-2, sIL-2Ra:IL-2 ratio, TNF?, TNFRI, and TNFRI:TNF? ratio).

Abstract: The present disclosure relates to methods, compositions, and kits for treating traumatic brain injury (TBI) and TBI-associated impairments in a subject. The methods include administering to the subject an interleukin-7 (IL-7) or IL-7 agonist, a TNF? inhibitor, or both. The present disclosure also relates to methods of using biomarkers for identifying a subject that is likely to respond to a treatment for TBI-associated impairments, and monitoring the subject's response to such treatment.