Described herein is a method of mitigating, in a subject (individual), tissue injury resulting from exposure to radiation (accidental/unintentional or intentional, such as therapeutic), chemoradiotherapy, disease, toxin, or drug or biologic mediated therapy.

Described herein is a method of mitigating, in a subject (individual), tissue injury resulting from exposure to radiation (accidental/unintentional or intentional, such as therapeutic), chemoradiotherapy, disease, toxin, or drug or biologic mediated therapy.

Described herein is a method of mitigating, in a subject (individual), tissue injury resulting from exposure to radiation (accidental/unintentional or intentional, such as therapeutic), chemoradiotherapy, disease, toxin, or drug or biologic mediated therapy.

The invention relates inter alia to a protein which is a VTFT isoform of a BPIFB4 protein or a functional fragment thereof for use in the treatment or prophylaxis of a condition selected from neuronal diseases and injuries, said diseases and injuries being associated with mitochondrial dysfunction and/or protein aggregation and/or ameliorated by CXCR4 activation.