2 research outputs found
Development of a Series of Kynurenine 3-Monooxygenase Inhibitors Leading to a Clinical Candidate for the Treatment of Acute Pancreatitis
Recently,
we reported a novel role for KMO in the pathogenesis
of acute pancreatitis (AP). A number of inhibitors of kynurenine 3-monooxygenase
(KMO) have previously been described as potential treatments for neurodegenerative
conditions and particularly for Huntingtonās disease. However,
the inhibitors reported to date have insufficient aqueous solubility
relative to their cellular potency to be compatible with the intravenous
(iv) dosing route required in AP. We have identified and optimized
a novel series of high affinity KMO inhibitors with favorable physicochemical
properties. The leading example is exquisitely selective, has low
clearance in two species, prevents lung and kidney damage in a rat
model of acute pancreatitis, and is progressing into preclinical development
The Discovery of IāBET726 (GSK1324726A), a Potent Tetrahydroquinoline ApoA1 Up-Regulator and Selective BET Bromodomain Inhibitor
Through
their function as epigenetic readers of the histone code,
the BET family of bromodomain-containing proteins regulate expression
of multiple genes of therapeutic relevance, including those involved
in tumor cell growth and inflammation. BET bromodomain inhibitors
have profound antiproliferative and anti-inflammatory effects which
translate into efficacy in oncology and inflammation models, and the
first compounds have now progressed into clinical trials. The exciting
biology of the BETs has led to great interest in the discovery of
novel inhibitor classes. Here we describe the identification of a
novel tetrahydroquinoline series through up-regulation of apolipoprotein
A1 and the optimization into potent compounds active in murine models
of septic shock and neuroblastoma. At the molecular level, these effects
are produced by inhibition of BET bromodomains. X-ray crystallography
reveals the interactions explaining the structureāactivity
relationships of binding. The resulting lead molecule, I-BET726, represents
a new, potent, and selective class of tetrahydroquinoline-based BET
inhibitors