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Table 3 Oxindole-based FLT3 inhibitors

From: Indole-based FLT3 inhibitors and related scaffolds as potential therapeutic agents for acute myeloid leukemia

Compound name and its structure

Description

Refs.

Target

FLT3, c- KIT, PDGFR-ẞ, and VEGFDR2

[35, 40, 67, 69, 78,79,80]

Binding mode to FLT3 kinase

Type I

Mutation point

A848P, A627P, F691L, and Y842C

FLT3 Potency (IC50)

50, and 250 nM (FLT3-ITD (in MV4-16 cells), and FLT3-wt (in RS4-16 cells), respectively)

In vitro targeted AML cells (IC50)

8 and 15 nM (in MV4-16 expressing FLT3-ITD, and OC1-AML5 cells expressing FLT3-wt, respectively)

Target

FLT3-wt, FLT3-D835Y, and FLT3-D835H

[81]

Binding mode to FLT3 kinase

Type I

FLT3 Potency (IC50)

40, 8, and 4 nM, respectively

In vitro targeted AML cells (IC50)

40 nM (HCD-57; murine erythropoietin dependent erythroleukemia cells) expressing FLT3-ITD, FLT3- D835Y, and FLT3-D835H)

Target

FLT3, FLT3-ITD, and FLT3-D835Y

[82]

Binding mode to FLT3 kinase

Type I

FLT3 Potency (IC50)

5.3, 0.7, and 2.7 nM, respectively

In vitro targeted AML cells (IC50)

24.8, 5.9, and 5.5 nM (MV4-16, FLT-ITD- MV4-16, and MOLM-18, respectively)

Target

FLT3-ITD

[83]

FLT3-ITD Potency (IC50)

1.25 μM and17.5 μM (with % inhibition 90.9, ≥ 100.0, respectively)

In vitro targeted AML cells (IC50)

2.2 μM (MV4-16)

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Target

FLT3-ITD- D835H, FLT3-ITD- F691L, and FLT3-D835H

[84]

Binding mode to FLT3 kinase

Type I

FLT3 Potency (IC50)

0.83, 1.5, and 1.3 nM

Target

wt-FLT3, FLT3-ITD, and FLT3/D835Y

[85]

Binding mode to FLT3 kinase

Type I

FLT3 Potency (IC50)

0.87, 0.25, and 0.32 nM

In vitro targeted AML cells (IC50)

1.0 nM

Target

FLT3, FLT3-ITD, and FLT3-D835Y

[86]

Binding mode to FLT3 kinase

Type II

FLT3 Potency (IC50)

1.8, 0.8, and 1.9 nM, respectively

In vitro targeted AML cells (IC50)

23.5 nM (FLT3-ITD- MV4-16), and 35.5 nM (MOLM-18)

Target

FLT3, CDK-2, EGFR, and VEGFR-2 (KDR)

[87]

Binding mode to FLT3 kinase

Type II

FLT3 Potency (IC50)

0.546 µM

In vitro targeted cancer cells (IC50)

3.56 µM (MCF-7)

Target

FLT3, PDGFRα, VEGFR-2 (KDR), Aurora A and B

[88]

Binding mode to FLT3 kinase

Type I

FLT3 Potency (IC50)

74.85, 24.15, 46.65, 16.83, and 29.38 nM, respectively

In vitro targeted AML cells (IC50)

6.84 and 2.97 µM (CCRF-CEM, and SR leukemia cells, respectively)

Target

FLT3-ITD

[89]

FLT3 Potency (IC50)

2.49 μM

In vitro targeted AML cells (IC50)

4.3 and 8.7 μM (FLT-ITD- MV4-16, and FLT3-wt-THP-1cells, respectively)