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2013 ; 4
(1
): 91-7
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Discovery of the Highly Potent PI3K/mTOR Dual Inhibitor PF-04979064 through
Structure-Based Drug Design
#MMPMID24900568
Cheng H
; Li C
; Bailey S
; Baxi SM
; Goulet L
; Guo L
; Hoffman J
; Jiang Y
; Johnson TO
; Johnson TW
; Knighton DR
; Li J
; Liu KK
; Liu Z
; Marx MA
; Walls M
; Wells PA
; Yin MJ
; Zhu J
; Zientek M
ACS Med Chem Lett
2013[Jan]; 4
(1
): 91-7
PMID24900568
show ga
PI3K, AKT, and mTOR are key kinases from PI3K signaling pathway being extensively
pursued to treat a variety of cancers in oncology. To search for a structurally
differentiated back-up candidate to PF-04691502, which is currently in phase I/II
clinical trials for treating solid tumors, a lead optimization effort was carried
out with a tricyclic imidazo[1,5]naphthyridine series. Integration of
structure-based drug design and physical properties-based optimization yielded a
potent and selective PI3K/mTOR dual kinase inhibitor PF-04979064. This manuscript
discusses the lead optimization for the tricyclic series, which both improved the
in vitro potency and addressed a number of ADMET issues including high metabolic
clearance mediated by both P450 and aldehyde oxidase (AO), poor permeability, and
poor solubility. An empirical scaling tool was developed to predict human
clearance from in vitro human liver S9 assay data for tricyclic derivatives that
were AO substrates.