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2014 ; 15
(12
): 1635-45
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
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English Wikipedia
Discovery of fruquintinib, a potent and highly selective small molecule inhibitor
of VEGFR 1, 2, 3 tyrosine kinases for cancer therapy
#MMPMID25482937
Sun Q
; Zhou J
; Zhang Z
; Guo M
; Liang J
; Zhou F
; Long J
; Zhang W
; Yin F
; Cai H
; Yang H
; Zhang W
; Gu Y
; Ni L
; Sai Y
; Cui Y
; Zhang M
; Hong M
; Sun J
; Yang Z
; Qing W
; Su W
; Ren Y
Cancer Biol Ther
2014[]; 15
(12
): 1635-45
PMID25482937
show ga
VEGF/VEGFR signal axis has been proven to be an important target for development
of novel cancer therapies. One challenging aspect in small molecular VEGFR
inhibitors is to achieve sustained target inhibition at tolerable doses
previously seen only with the long-acting biologics. It would require high
potency (low effective drug concentrations) and sufficient drug exposures at
tolerated doses so that the drug concentration can be maintained above effective
drug concentration for target inhibition within the dosing period. Fruquintinib
(HMPL-013) is a small molecule inhibitor with strong potency and high selectivity
against VEGFR family currently in Phase II clinical studies. Analysis of Phase I
pharmacokinetic data revealed that at the maximum tolerated dose of once daily
oral administration fruquintinib achieved complete VEGFR2 suppression (drug
concentrations were maintained above that required to produce >85% inhibition of
VEGFR2 phosphorylation in mouse) for 24 hours/day. In this article, the
preclinical data for fruquintinib will be described, including kinase enzyme
activity and selectivity, cellular VEGFR inhibition and VEGFR-driven functional
activity, in vivo VEGFR phosphorylation inhibition in the lung tissue in mouse
and tumor growth inhibition in a panel of tumor xenograft and patient derive
xenograft models in mouse. Pharmacokinetic and target inhibition data are also
presented to provide a correlation between target inhibition and tumor growth
inhibition.