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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Enzyme+Inhib+Med+Chem
2018 ; 33
(1
): 349-358
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Chemical, computational and functional insights into the chemical stability of
the Hedgehog pathway inhibitor GANT61
#MMPMID29338454
Calcaterra A
; Iovine V
; Botta B
; Quaglio D
; D'Acquarica I
; Ciogli A
; Iazzetti A
; Alfonsi R
; Lospinoso Severini L
; Infante P
; Di Marcotullio L
; Mori M
; Ghirga F
J Enzyme Inhib Med Chem
2018[Dec]; 33
(1
): 349-358
PMID29338454
show ga
This work aims at elucidating the mechanism and kinetics of hydrolysis of GANT61,
the first and most-widely used inhibitor of the Hedgehog (Hh) signalling pathway
that targets Glioma-associated oncogene homologue (Gli) proteins, and at
confirming the chemical nature of its bioactive form. GANT61 is poorly stable
under physiological conditions and rapidly hydrolyses into an aldehyde species
(GANT61-A), which is devoid of the biological activity against Hh signalling, and
a diamine derivative (GANT61-D), which has shown inhibition of Gli-mediated
transcription. Here, we combined chemical synthesis, NMR spectroscopy, analytical
studies, molecular modelling and functional cell assays to characterise the
GANT61 hydrolysis pathway. Our results show that GANT61-D is the bioactive form
of GANT61 in NIH3T3 Shh-Light II cells and SuFu(-/-) mouse embryonic fibroblasts,
and clarify the structural requirements for GANT61-D binding to Gli1. This study
paves the way to the design of GANT61 derivatives with improved potency and
chemical stability.