Discovery of new cholesteryl ester transfer protein inhibitors via ligand-based pharmacophore modeling and QSAR analysis followed by synthetic exploration
摘要:
Cholesteryl ester transfer protein (CETP) is involved in trafficking lipoprotein particles and neutral lipids between HDL and LDL and therefore is considered a valid target for treating dyslipidemic conditions and complications. Pharmacophore modeling and quantitative structure-activity relationship (QSAR) analysis were combined to explore the structural requirments for potent CETP inhibitors. Two pharmacophores emerged in the optimal QSAR equation (r(2) = 0.800, n = 96, F = 72.1. r(LOO)(2) = 0.775, r(PRESS)(2) against 22 external test inhibitors = 0.707) suggesting the existence of at least two distinct binding modes accessible to ligands within CETP binding pocket. The successful pharmacophores were complemented with strict shape constraints in an attempt to optimize their receiver-operating characteristic (ROC) curve profiles.The validity of our modeling approach was experimentally established by the identification of several CETP inhibitory leads retrieved via in silk screening of the National Cancer Institute (NCI) list of compounds and an in house built database of drugs and agrochemicals. Two hits illustrated low micromolar IC50 values: NSC 40331 (IC50 = 6.5 mu M) and NSC 89508 (IC50 = 1.9 mu M). Active hits were then used to guide synthetic exploration of a new series of CETP inhibitors. (c) 2010 Elsevier Masson SAS. All rights reserved.
Discovery of new cholesteryl ester transfer protein inhibitors via ligand-based pharmacophore modeling and QSAR analysis followed by synthetic exploration
摘要:
Cholesteryl ester transfer protein (CETP) is involved in trafficking lipoprotein particles and neutral lipids between HDL and LDL and therefore is considered a valid target for treating dyslipidemic conditions and complications. Pharmacophore modeling and quantitative structure-activity relationship (QSAR) analysis were combined to explore the structural requirments for potent CETP inhibitors. Two pharmacophores emerged in the optimal QSAR equation (r(2) = 0.800, n = 96, F = 72.1. r(LOO)(2) = 0.775, r(PRESS)(2) against 22 external test inhibitors = 0.707) suggesting the existence of at least two distinct binding modes accessible to ligands within CETP binding pocket. The successful pharmacophores were complemented with strict shape constraints in an attempt to optimize their receiver-operating characteristic (ROC) curve profiles.The validity of our modeling approach was experimentally established by the identification of several CETP inhibitory leads retrieved via in silk screening of the National Cancer Institute (NCI) list of compounds and an in house built database of drugs and agrochemicals. Two hits illustrated low micromolar IC50 values: NSC 40331 (IC50 = 6.5 mu M) and NSC 89508 (IC50 = 1.9 mu M). Active hits were then used to guide synthetic exploration of a new series of CETP inhibitors. (c) 2010 Elsevier Masson SAS. All rights reserved.
Polyacetylinic oligomers suitable for high-temperature polymer-matrix composites are provided. The polyacetylinic oligomers have the formula:
D-A-D
wherein
D is an endcap including at least one crosslinking functionality; and
A is backbone selected from the group consisting of imidesulfone; ether; ethersulfone; amide; imide; ester; estersulfone; etherimide; amideimide; oxazole; oxazole sulfone; thiazole; thiazole sulfone; imidazole; and imidazole sulfone. At least one ethynyl functional group, however, is incorporated into the backbone such that crosslinking is not only realized at the endcaps but also at the ethynyl groups within the backbone of the oligomer itself.
WATER-ENTRAINED-POLYIMIDE CHEMICAL COMPOSITIONS FOR USE IN HIGH-PERFORMANCE COMPOSITE FABRICATION
申请人:Lubowitz Hyman Ralph
公开号:US20080300360A1
公开(公告)日:2008-12-04
Water-entrained compositions comprising colloidal or suspensoidal solutions comprising polyimide pre-polymers/oligomers are described. These compositions are obtained in water by initial dispersion of the resin constituents in water to from colloids or suspensoids. The water-entrained polyimide compositions can be applied to numerous surfaces or more beneficially used for composite fabrication. The coated surfaces or polyimide-pre-polymer impregnated reinforcing materials are subsequently cured and are ideal for providing thermal protection.
US8106142B2
申请人:——
公开号:US8106142B2
公开(公告)日:2012-01-31
US8309663B2
申请人:——
公开号:US8309663B2
公开(公告)日:2012-11-13
Discovery of new cholesteryl ester transfer protein inhibitors via ligand-based pharmacophore modeling and QSAR analysis followed by synthetic exploration
作者:Reema Abu Khalaf、Ghassan Abu Sheikha、Yasser Bustanji、Mutasem O. Taha
DOI:10.1016/j.ejmech.2009.12.070
日期:2010.4
Cholesteryl ester transfer protein (CETP) is involved in trafficking lipoprotein particles and neutral lipids between HDL and LDL and therefore is considered a valid target for treating dyslipidemic conditions and complications. Pharmacophore modeling and quantitative structure-activity relationship (QSAR) analysis were combined to explore the structural requirments for potent CETP inhibitors. Two pharmacophores emerged in the optimal QSAR equation (r(2) = 0.800, n = 96, F = 72.1. r(LOO)(2) = 0.775, r(PRESS)(2) against 22 external test inhibitors = 0.707) suggesting the existence of at least two distinct binding modes accessible to ligands within CETP binding pocket. The successful pharmacophores were complemented with strict shape constraints in an attempt to optimize their receiver-operating characteristic (ROC) curve profiles.The validity of our modeling approach was experimentally established by the identification of several CETP inhibitory leads retrieved via in silk screening of the National Cancer Institute (NCI) list of compounds and an in house built database of drugs and agrochemicals. Two hits illustrated low micromolar IC50 values: NSC 40331 (IC50 = 6.5 mu M) and NSC 89508 (IC50 = 1.9 mu M). Active hits were then used to guide synthetic exploration of a new series of CETP inhibitors. (c) 2010 Elsevier Masson SAS. All rights reserved.