The present invention relates to a composition for inhibiting
protein translocation in cells harbouring a target
nucleic acid (NA) molecule such as a ribonucleic acid (
RNA) molecule, the composition comprising
a peptide construct, comprising a
protein secretion signal amino-acid sequence ("SP sequence"), and a
nucleic acid mimic (NAM) sequence such as
a peptide nucleic acid (PNA) sequence comprising 5 to 30 consecutive bases complementary to a sequence of the target NA molecule; and a
delivery vehicle for delivering the
peptide construct to cells. The present invention further relates to a method for inhibiting
protein translocation in cells harbouring a target NA molecule, comprising the step of delivering to the cells
a peptide construct, comprising an SP sequence, and a NAM sequence such as a PNA sequence comprising 5 to 30 consecutive bases complementary to a sequence of the target NA molecule. The present invention further relates to uses of such compositions and methods for therapy of the human or
animal body,
plant treatment and
pest control, among other uses.