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IC50: 21/ 13 nM for mTOR/DNA-PK

CC-115 is a inhibitor of mTOR/DNA-PK.

The mammalian target of rapamycin (mTOR) kinase is a key mediator of the phosphoinositide 3-kinase /protein kinase B (AKT pathway). The DNA-dependent protein kinase (DNA-PK) is a critical component of the DNA repair machinery governings the response to DNA damage, which serves to maintain genome integrity.

In vitro: Previous study found that the proliferation induced by CD40(+) interleukin-21 stimulation could be completely blocked by CC-115, and CD40-mediated resistance to fludarabine and venetoclax could also be reverted by CC-115. Moreover, BCR-mediated signaling was blocked by CC-115 and in CLL samples from patients with acquired resistance to idelalisib treatment [1].

In vivo: Preclinical studies showed that CC-115 had good in vivo PK profiles across multiple species with 53%, 76%, and around100% oral bioavailability in mouse, rat, and dog, respectively [2].

Clinical trial: Clinical efficacy of CC-115 was studied in 8 patients with relapsed/refractory CLL/small lymphocytic lymphoma harboring ATM deletions/mutations. Results showed that all but one patient had a decrease in lymphadenopathy, leading to 1 IWCLL partial response (PR) and 3 PRs with lymphocytosis. These early promising clinical activity suggested that CC-115 might be developed further for treatment of CLL [1].

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