The present invention relates to novel polymer conjugates of K-252a and derivatives thereof and to their use for the preparation of a pharmaceutical composition useful for the prevention, alleviation and treatment of kinase-associated pathologies. In particular, the present invention relates to the prevention, alleviation and treatment of HMGB1-associated pathologies. In a particular aspect, the invention relates to the use of the novel polymer conjugates of K-252a and derivatives thereof in the preparation of a pharmaceutical composition useful for the prevention, alleviation and treatment of neurological disorders, neuropathies and neurodegenerative disorders of the central and peripheral nervous system. In a further preferred aspect, the invention relates to the use of the polymer conjugates in the preparation of a pharmaceutical composition useful for the prevention, alleviation and treatment of dermal pathologies, in particular dermal pathologies associated with an excessive keratinocyte proliferation, in particular psoriasis. In a still further aspect, the invention relates to the use of the polymer conjugates in the prevention, alleviation and treatment of NGF-related pain. More specifically, the present invention relates to a polymer conjugate of K-252a and derivatives thereof, wherein the polymer is polyethylene glycol or methoxy-polyethylene glycol formula (I).