Novel bis(1H-indol-2-yl)methanones as potent inhibitors of FLT3 and platelet-derived growth factor receptor tyrosine kinase.

Abstract:

:FLT3 receptor tyrosine kinase is aberrantly active in many cases of acute myeloid leukemia (AML). Recently, bis(1H-indol-2-yl)methanones were found to inhibit FLT3 and PDGFR kinases. To optimize FLT3 activity and selectivity, 35 novel derivatives were synthesized and tested for inhibition of FLT3 and PDGFR autophosphorylation. The most potent FLT3 inhibitors 98 and 102 show IC50 values of 0.06 and 0.04 microM, respectively, and 1 order of magnitude lower PDGFR inhibiting activity. The derivatives 76 and 82 are 20- to 40-fold PDGFR selective. Docking at the recent FLT3 structure suggests a bidentate binding mode with the backbone of Cys-694. Activity and selectivity can be related to interactions of one indole moiety with a hydrophobic pocket including Phe-691, the only different binding site residue (PDGFR Thr-681). Compound 102 inhibited the proliferation of 32D cells expressing wildtype FLT3 or FLT3-ITD similarly as FLT3 autophosphorylation, and induced apoptosis in primary AML patient blasts.

journal_name

J Med Chem

authors

Mahboobi S,Uecker A,Sellmer A,Cénac C,Höcher H,Pongratz H,Eichhorn E,Hufsky H,Trümpler A,Sicker M,Heidel F,Fischer T,Stocking C,Elz S,Böhmer FD,Dove S

doi

10.1021/jm058033i

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

3101-15

issue

11

eissn

0022-2623

issn

1520-4804

journal_volume

49

pub_type

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