Abstract: The present invention relates to polypeptides transiently activating Ras homolog gene family member A (RhoA) GTPase, polynucleotides encoding said polypeptides and pharmaceutical compositions comprising said polypeptides or said polynucleotides. The present invention further relates to the use of said polypeptides, said polynucleotides or said pharmaceutical compositions for long-term treatment of damage of the peripheral or central nervous system.