NCIt definition : A c-Myc antisense phosphorodiamidate morpholino oligomer (PMO) with potential antineoplastic
activity. Phosphorodiamidate morpholino oligomer AVI-4126 binds to c-Myc mRNA and
blocks its translation, which may result in the death of tumor cells overexpressing
c-Myc. Differing from traditional antisense oligodeoxynucleotides (ODNs), neutrally
charged PMOs are composed of subunits of nucleic acid bases linked to a synthetic
backbone and, so, are less prone to enzymatic degradation. c-Myc, a proto-oncogene
overexpressed in a variety of cancers, is involved in cellular proliferation, differentiation,
and apoptosis.;