TBK1/IKKε-IN-1(compound 1)

Catalog No.S8922

For research use only.

TBK1/IKKε-IN-1 (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-1(compound 1) Chemical Structure

CAS No. 1893397-65-3

Selleck's TBK1/IKKε-IN-1(compound 1) has been cited by 2 Publications

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Biological Activity

Description TBK1/IKKε-IN-1 (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.
Targets
TBK1 [1]
(Cell-free assay)
IKKε [1]
(Cell-free assay)
1.0 nM 5.6 nM
In vitro

TBK1/IKKε-IN-1(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]

Protocol (from reference)

Cell Research:

[1]

  • Cell lines: HCT116 cells, human CD4+ T cells, human CD8+ T cells
  • Concentrations: 1 μM
  • Incubation Time: 1 h, 24 h, 96 h
  • Method:

    Interleukin-2 and interferon gamma analysis—Freshly isolated human CD4+ and CD8+ T cells are spun down and resuspended in serum free X-vivo15 media supplemented with 5 ng/mL IL-17 and incubated overnight at 37°C. Cells are plated on anti-CD3 coated plates with 2 μg/mL anti-CD28. Cells are treated in replicate plates with a dose-titration of TBK1/IKKε-IN-1(compound 1) for 24 hours for IL-2 and 96 hours for IFNγ. IL-2 and IFNγ in the supernatant are measured using single-or multi-plex immunoassay. Jurkat T cell leukemia cells plated on anti-CD3 coated plates are treated with a dose titration of TBK1/IKKε-IN-1(compound 1) for 24 hours.

Animal Research:

[1]

  • Animal Models: 11-12 week old female Balb/c mice implanted with 1×106 CT26 colon carcinoma cells.
  • Dosages: 40 mg/kg
  • Administration: Oral gavage

Solubility (25°C)

In vitro

Chemical Information

Molecular Weight 513.59
Formula

C28H31N7O3

CAS No. 1893397-65-3
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles C1COCCC1OC2=C(C=C(C=C2)C3=NC(=NC=N3)NC4=CC=C(C=C4)N5CCN(CC5)C6COC6)C#N

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