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TBK1/IKKε-IN-5 IκB/IKK inhibitor

Cat.No.S8922

TBK1/IKKε-IN-5 (compound 1) is a dual inhibitor of TANK-binding kinase 1 (TBK1) and IκB kinase-ε (IKKε/IKK-i) with IC50 of 1.0 nM and 5.6 nM for TBK1 and IKKε, respectively. TBK1/IKKε inhibition enhances response to PD-1 blockade, which effectively predicts tumor response in vivo.
TBK1/IKKε-IN-5 IκB/IKK inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 513.59

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Quality Control

Chemical Information, Storage & Stability

Molecular Weight 513.59 Formula

C28H31N7O3

 Storage (From the date of receipt) 3 years -20°C powder
CAS No. 1893397-65-3 -- Storage of Stock Solutions

Synonyms compound 1 Smiles C1COCCC1OC2=C(C=C(C=C2)C3=NC(=NC=N3)NC4=CC=C(C=C4)N5CCN(CC5)C6COC6)C#N

Solubility

In vitro
Batch:

DMSO : 5 mg/mL (9.73 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

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In vivo
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Mechanism of Action

Targets/IC50/Ki
TBK1 [1]
(Cell-free assay)
1.0 nM
IKKε [1]
(Cell-free assay)
5.6 nM
In vitro

TBK1/IKKε-IN-5(compound 1) effectively blocks immune suppressive cytokine elaboration by CT26 cell line spheroids, without cytotoxic effects, and enhances secretion of IL-2 and IFN-γ from purified CD4+ and CD8+ T cells from healthy human donors and IL-2 from Jurkat human T-cell leukemia cells. Ex vivo addition of TBK1/IKKε-IN-1(compound 1) to PD-1 blockade enhances killing of CT26 MDOTS, associated with decreased levels of CCL4, CCL3, and IL-1β and induction of cytokines involved in activated innate immune responses.[1]
In vivo

Balb/c mice bearing CT26 tumors are treated with TBK1/IKKε-IN-1(compound 1) ± anti-PD-L1. Consistent with MDOTS profiling data, greater tumor control and longer survival is evident with TBK1/IKKε-IN-1(compound 1) + anti-PD-L1 than with either TBK1/IKKε-IN-1(compound 1) or anti-PD-L1 alone. Reimplantation of CT26 into mice with exceptional responses to combination therapy shows no growth, whereas EMT-6 implanted tumors grow normally, suggesting induction of immunologic memory of CT26 cells in mice treated with TBK1/IKKε-IN-1(compound 1) + anti-PD-L1. Therefore, MDOTS profiling effectively recapitulates the in vivo response to PD-1 blockade +/− TBK1/IKKε inhibition, highlighting the potential of ex vivo screening in MDOTS to develop combination immunotherapies.[1]
References

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