DCC-2036 (Rebastinib)

DCC-2036 is a conformational control inhibitor of ABL1 with IC50 value of 0.8nM [1].

DCC-2036 is synthesized as a dual-anchoring inhibitor that binds both the switch control pocket E282/R386 pair and the Met318 ATP hinge. It shows a IC50 value of 0.8nM. DCC-2036 also exerts potent inhibition of the gatekeeper mutant ABL1T315I with IC50 value of 4nM. DCC-2036 inhibits ABL1 through forcing the kinase domains into inhibitor-bound, inactive Type II conformations. For the purified ABL1, DCC-2036 strongly inhibits unphosphorylated native ABL1, phosphorylated native ABL1, ABL1H396P, unphosphorylated ABL1T315I and phosphorylated ABL1T315I with IC50 values of 0.82nM, 2nM, 1.4nM, 5nM and 4nM, respectively. It is found that DCC-2036 inhibits ABL1 in a non-ATP-competitive manner. In cellular assay, DCC-2036 inhibits the proliferation of Ba/F3 and K562 cells with IC50 values of 5.4nM and 5.5nM, respectively. Moreover, treatment of DCC-2036 can effectively prolong survival in mice bearing Ba/F3-BCR-ABL1T315I leukemia cells. DCC-2036 is also capable to inhibit BCR-ABL1 in primary leukemic cells from patients with Ph+ leukemia [1].

References:
[1] Chan W W, Wise S C, Kaufman M D, et al. Conformational control inhibition of the BCR-ABL1 tyrosine kinase, including the gatekeeper T315I mutant, by the switch-control inhibitor DCC-2036. Cancer cell, 2011, 19(4): 556-568.

Phase 1 dose-finding study of rebastinib (DCC-2036) in patients with relapsed chronic myeloid leukemia and acute myeloid leukemia.[Pubmed:27927766]

Haematologica. 2017 Mar;102(3):519-528.

A vailable tyrosine kinase inhibitors for chronic myeloid leukemia bind in an adenosine 5'-triphosphate-binding pocket and are affected by evolving mutations that confer resistance. Rebastinib was identified as a switch control inhibitor of BCR-ABL1 and FLT3 and may be active against resistant mutations. A Phase 1, first-in-human, single-agent study investigated rebastinib in relapsed or refractory chronic or acute myeloid leukemia. The primary objectives were to investigate the safety of rebastinib and establish the maximum tolerated dose and recommended Phase 2 dose. Fifty-seven patients received treatment with rebastinib. Sixteen patients were treated using powder-in-capsule preparations at doses from 57 mg to 1200 mg daily, and 41 received tablet preparations at doses of 100 mg to 400 mg daily. Dose-limiting toxicities were dysarthria, muscle weakness, and peripheral neuropathy. The maximum tolerated dose was 150 mg tablets administered twice daily. Rebastinib was rapidly absorbed. Bioavailability was 3- to 4-fold greater with formulated tablets compared to unformulated capsules. Eight complete hematologic responses were achieved in 40 evaluable chronic myeloid leukemia patients, 4 of which had a T315I mutation. None of the 5 patients with acute myeloid leukemia responded. Pharmacodynamic analysis showed inhibition of phosphorylation of substrates of BCR-ABL1 or FLT3 by rebastinib. Although clinical activity was observed, clinical benefit was insufficient to justify continued development in chronic or acute myeloid leukemia. Pharmacodynamic analyses suggest that other kinases inhibited by rebastinib, such as TIE2, may be more relevant targets for the clinical development of rebastinib (clinicaltrials.gov Identifier:00827138).

Rebastinib (DCC-2036) is a conformational control Bcr-Abl inhibitor for Abl1WT and Abl1T315I with IC50 of 0.8 nM and 4 nM, also inhibits SRC, KDR, FLT3, and Tie-2, and low activity to seen towards c-Kit.

DCC-2036 (Rebastinib),1020172-07-9,Rebastinib,Natural Products, buy DCC-2036 (Rebastinib) , DCC-2036 (Rebastinib) supplier , purchase DCC-2036 (Rebastinib) , DCC-2036 (Rebastinib) cost , DCC-2036 (Rebastinib) manufacturer , order DCC-2036 (Rebastinib) , high purity DCC-2036 (Rebastinib)