IRES-C11 is a spectfic c-MYC internal ribosome entry site (IRES) translation inhibitor. IRES-C11 blocks the interaction of a requisite c-MYC IRES trans-acting factor, heterogeneous nuclear ribonucleoprotein A1, with its IRES. IRES-C11 does not inhibits BAG-1, XIAP and p53 IRESes.
In Vitro
IRES-C11 blocks cyclin D1 IRES-dependent initiation and demonstrates synergistic anti-glioblastoma properties when combined with the mechanistic target of mTOR PP242. IRES-C11 (50 nM) significantly inhibits both cyclin D1 and c-MYC IRES activity. IRES-C11 treatment induces a significant shift in both cyclin D1 and c-MYC mRNA to monosomal/nonribosomal fractions, whereas actin mRNA distribution is unaffected. IRES-C11 inhibits both cyclin D1 and c-MYC IRES-mediated mRNA translation, leading to reductions in protein levels. Mechanistic studies with IRES-C11 reveal binding of the inhibitors within the UP1 fragment of heterogeneous nuclear ribonucleoprotein A1. MCE has not independently confirmed the accuracy of these methods. They are for reference only.
