The present invention relates to pharmaceutical compositions comprising a compound selected from the group consisting of : a) a polypeptide of SEQ ID NO : 1, b) a functionally equivalent variant of the polypeptide according to a), c) a polynucleotide encoding a) or b), d) a vector comprising a polynucleotide according to c), e) a cell capable of secreting into the medium a polypeptide according to a) or b), and f) a nanoparticle comprising the polypeptide according to a) or b) and a pharmaceutically acceptable excipient. The invention also relates to the use of said compounds or pharmaceutical compositions for treatment and/or prevention of ischemia injury or ischemia/reperfusion injury in a subject.