New activators of eIF2α Kinase Heme-Regulated Inhibitor (HRI) with improved biophysical properties
摘要:
Heme-regulated inhibitor (HRI), a eukaryotic translation initiation factor 2 alpha (eIF2 alpha) kinase, is critically important for coupling protein synthesis to heme availability in reticulocytes and adaptation to various environmental stressors in all cells. HRI modifies the severity of several hemoglobin misfolding disorders including beta-thalassemia. Small molecule activators of HRI are essential for studying normaland patho-biology of this kinase as well as for the treatment of various human disorders for which activation of HRI or phosphorylation of eIF2 alpha may be beneficial. We previously reported development of 14(1,4-trans)-4-aryloxycyclohexyl)-3-arylureas (cHAUs) as specific HRI activators and demonstrated their potential as molecular probes for studying HRI biology and as lead compounds for treatment of various human disorders. To develop more druglike cHAUs for in vivo studies and drug development and to expand the chemical space, we undertook bioassay guided structure-activity relationship studies replacing cyclohexyl ring with various 4-6-membered rings and explored further substitutions on the N-phenyl ring. We tested all analogs in the surrogate eIF2 alpha phosphorylation and cell proliferation assays, and a subset of analogs in secondary mechanistic assays that included endogenous eIF2 alpha phosphorylation and expression of C/EBP homologous protein (CHOP), a downstream effector. Finally, we determined specificity of these compounds for HRI by testing their anti-proliferative activity in cells transfected with siRNA targeting HRI or mock. These compounds have significantly improved cLogPs with no loss of potencies, making them excellent candidates for lead optimization for development of investigational new drugs that potently and specifically activate HRI. (C) 2019 Published by Elsevier Masson SAS.
Development of 1-((1,4-trans)-4-Aryloxycyclohexyl)-3-arylurea Activators of Heme-Regulated Inhibitor as Selective Activators of the Eukaryotic Initiation Factor 2 Alpha (eIF2α) Phosphorylation Arm of the Integrated Endoplasmic Reticulum Stress Response
摘要:
Heme-regulated inhibitor (HRI), an eukaryotic translation initiation factor 2 alpha (eIF2 alpha) kinase, plays critical roles in cell proliferation, differentiation, adaptation to stress, and hemoglobin disorders. HRI phosphorylates eIF2 alpha, which couples cellular signals, including endoplasmic reticulum (ER) stress, to translation. We previously identified 1,3-diarylureas and 1-((1,4-trans)-4-aryloxycydohexyl)-3-arylureas (cHAUs) as specific activators of HRI that trigger the eIF2 alpha phosphorylation arm of ER stress response as molecular probes for studying HRI biology and its potential as a druggable target. To develop drug-like cHAUs needed for in vivo studies, we undertook bioassay-guided structure-activity relationship studies and tested them in the surrogate eIF2 alpha phosphorylation and cell proliferation assays. We further evaluated some of these cHAUs in endogenous eIF2 alpha phosphorylation and in the expression of the transcription factor C/EBP homologous protein (CHOP) and its mRNA, demonstrating significantly improved solubility and/or potencies. These cHAUs are excellent candidates for lead optimization for development of investigational new drugs that potently and specifically activate HRI.
CYCLOPROPANECARBOXAMIDO-SUBSTITUTE AROMATIC COMPOUNDS AS ANTI-TUMOR AGENTS
申请人:Crown Bioscience Inc. (Taiwan)
公开号:US20150197511A1
公开(公告)日:2015-07-16
Provided are cyclopropanecarboxamido-substituted aromatic compounds that inhibit protein kinases and their use in anti-tumor area. In particular, tyrosine-kinase inhibitors and Raf-kinase inhibitors as anti-tumor agents, their preparation, pharmaceutical composition, and their use in the treatment of cancer are also provided.
HETEROBICYCLIC CARBOXAMIDES AS INHIBITORS FOR KINASES
申请人:ARTMANN, III Gerald David
公开号:US20120245187A1
公开(公告)日:2012-09-27
The invention relates to novel organic compounds of formula (I)
and their use in the treatment of the animal or human body, to pharmaceutical compositions comprising a compound of formula I and to the use of a compound of formula I for the preparation of pharmaceutical compositions for use in the treatment of protein kinase dependent diseases, especially of proliferative diseases, such as in the treatment of tumour diseases and ocular neovascular diseases.
Heterobicyclic Carboxamides as inhibitors for kinases
申请人:Artmann, III Gerald David
公开号:US20100168082A1
公开(公告)日:2010-07-01
The invention relates to novel organic compounds of formula (I)
and their use in the treatment of the animal or human body, to pharmaceutical compositions comprising a compound of formula I and to the use of a compound of formula I for the preparation of pharmaceutical compositions for use in the treatment of protein kinase dependent diseases, especially of proliferative diseases, such as in the treatment of tumour diseases and ocular neovascular diseases.
Heterobicyclic carboxamides as inhibitors for kinases
申请人:Novartis AG
公开号:US08242125B2
公开(公告)日:2012-08-14
The invention relates to novel organic compounds of formula (I)
and their use in the treatment of the animal or human body, to pharmaceutical compositions comprising a compound of formula I and to the use of a compound of formula I for the preparation of pharmaceutical compositions for use in the treatment of protein kinase dependent diseases, especially of proliferative diseases, such as in the treatment of tumor diseases and ocular neovascular diseases.