The present invention provides agents for inhibiting binding of a pro-neurotrophin to a Vps1 Op-domain receptor, in particular the binding of a pro-NGF or a pro-BDNF to a Sortilin receptor. The invention thus provides agents for the manufacture of a medicament, for treating and/or preventing disease or disorders such as but not limited to neurological, neuropsychiatric and ocular diseases, disorders, and degeneration as well as obesity, diabetes, pain and/or nociception in an individual.