The present invention refers to an inhibitor consisting of oligonucleotides comprising 10 to 25 nucleotides, wherein at least one of the nucleotides is modified, and the oligonucleotide hybridizes with a nucleic acid sequence of C/EBP-homologous protein (Chop) of SEQ ID NO.1 (human) and/or SEQ ID NO. 48 (human) but also with mouse and rat sequences, wherein the oligonucleotide N inhibits at least 50% of the Chop expression. The invention is further directed to a pharmaceutical composition comprising such oligonucleotide.