We know that Afinitor ( see structure) is an inhibitor of mTOR (mammalian target of rapamycin), a  serine-threonine kinase, downstream of the PI3K/AKT pathway. The mTOR  pathway is dysregulated in several human cancers. Everolimus binds to an  intracellular protein, FKBP-12, resulting in an inhibitory complex  formation and inhibition of mTOR kinase activity. Inhibition of mTOR by  everolimus has been shown to reduce cell proliferation, angiogenesis,  and glucose uptake in in vitro and/or in vivo studies.
Afinitor is  specifically indicated for the treatment of  advanced renal cell  carcinoma after failure of treatment with sunitinib or sorafenib. Afinitor  is supplied as a 5 mg or 10 mg tablet designed for oral administration.  The recommended initial dose of the drug is 10 mg, to be taken once  daily at the same time every day, either with or without food. Afinitor  tablets should be swallowed whole with a glass of water; they should not  be chewed or crushed....Now FDA approves the drug....
