Catalog No.S5716 Synonyms: LY2835219
Molecular Weight(MW): 506.59
Abemaciclib is a cell cycle inhibitor selective for CDK4/6 with IC50 of 2 nM and 10 nM in cell-free assays, respectively.
Cited by 9 publications
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|Description||Abemaciclib is a cell cycle inhibitor selective for CDK4/6 with IC50 of 2 nM and 10 nM in cell-free assays, respectively.|
Abemaciclib highly selective inhibits the complexes CDK4/ cyclin D1 (IC50 =2 nmol/L) and CDK6/cyclin D1 (IC50 =10 nmol/L), with no activity against other CDK/cyclin complexes or cell-cycle-related kinases within the nanomolar ranges, except for inhibition of CDK9 at IC50 at least five times higher. Besides the cell-cycle dependent activity, abemaciclib is able to boost antitumor immunity by potentiating tumor antigen presentation and selectively suppressing proliferation of regulatory T (Treg) cells at the same time. Consistent with its activity against CDK4 and CDK6, abemaciclib inhibits RB phosphorylation and leads to G1 arrest in RB-proficient cell lines. In vitro, treatment with abemaciclib resulted in increased activation of human T cells and upregulated expression of antigen presentation genes in MCF-7 breast cancer cells.
|In vivo||In a colorectal cancer xenograft model used to develop an integrated pharmacokinetic/pharmacodynamic model, abemaciclib can be dosed orally on a continuous schedule to achieve sustained target inhibition and demonstrates not only durable cell-cycle inhibition but also single-agent antitumor activity. Tumor growth inhibition is observed in multiple other human cancer xenograft models, including those derived from non-small cell lung cancer (NSCLC), melanoma, glioblastoma, and mantle cell lymphoma. Abemaciclib distributes across the blood–brain barrier and prolongs survival in an intracranial glioblastoma xenograft model. In human, The pharmacokinetics of abemaciclib shows a slow absorption phase with a median time from oral dose to maximum plasma concentration (tmax) ranging from 4 to 6 hours. It is extensively cleared and distributed. The mean terminal elimination half-life (t1/2) ranged from 17.4 to 38.1 hours with no apparent dose-dependent change in clearance.|
|In vitro||Ethanol||8 mg/mL (15.79 mM)|
|DMSO||6 mg/mL (11.84 mM)|
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Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT04030728||Not yet recruiting||--||Metastatic Breast Cancer|Advanced Breast Cancer||Onco Medical Consult GmbH|Eli Lilly and Company|Institut für Frauengesundheit GmbH||September 2019||--|
|NCT03905889||Suspended||Drug: Abemaciclib|Drug: Sunitinib||Renal Cell Carcinoma Metastatic||Milton S. Hershey Medical Center|Eli Lilly and Company||June 5 2019||Phase 1|
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