An active agent capable of reducing quinone reductase 2 activity, for use in improvement of cognition in a subject is provided. Such an active agent may be a nucleic acid molecule that reduces the gene expression level of quinone reductase 2 or an inhibitor of quinone reductase 2 activity. A vector comprising a nucleic acid molecule that reduces the gene expression level of quinone reductase 2 and a pharmaceutical composition comprising an active agent capable of reducing quinone reductase 2 activity or said vector are provided as well.
