INK128

INK128 (also known as MLN0128) is also an orally bioavailable mTOR inhibitor of raptor-mTOR (TOR complex 1 or TORC1) and rictor-mTOR (TOR complex 2 or TORC2) with potential antineoplastic activity. INK128 blocks the phosphorylation of downstream substrates of both TORC1 and TORC2. INK128 (MLN0128) exhibits an enzymatic inhibition activity against mTOR and more than 100-fold selectivity to PI3K kinases. INK128 interferes with the growth of cell lines which are resistant to rapamycin and pan-PI3K inhibitors. Oral administration of INK128 (MLN0128) inhibits angiogenesis and tumor growth in several xenograft models. In vitro and in vivo studies showed that p-4EBP1 and p-Akt inhibition could be predictive markers of TORC2 inhibition in MM cell lines. Dual TORC1/2 inhibition showed better inhibition of adhesion to BM microenvironmental cells and inhibition of homing in vivo.