The present invention relates to methods and means of transport of active substances in the cell cytosol. In particular, the invention relates to means that make it possible to transport directly in the cytosol substances capable of interacting with protein systems, such as the family of nuclear factors of activated T-cells (NFATs) or nucleic acids localized in the cytosol. In particular, the invention relates to nanoconstructs useful in the treatment of inflammatory diseases, methods for their preparation, and compositions containing them.