Potent, exceptionally selective, orally bioavailable inhibitors of TNF-α Converting Enzyme (TACE): Novel 2-substituted-1H-benzo[d]imidazol-1-yl)methyl)benzamide P1′ substituents
ABSTRACT Novel ((2-substituted-1H-benzo[d]imidazol-1-yl)methyl)benzamides were found to be excellent P1' substituents in conjunction with unique constrained beta-amino hydroxamic acid scaffolds for the discovery of potent selective inhibitors of TNF-alpha Converting Enzyme (TACE). Optimized examples proved potent for TACE, exceptionally selective over a wide panel of MMP and ADAM proteases, potent in the suppression of LPS-induced TNF-alpha in human whole blood and orally bioavailable. (c) 2008 Elsevier Ltd. All rights reserved.
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- "Because of the clinical success of anti-TNF-a biological drugs such as etanercept (Enbrel), infliximab (Remicade) and adalimumab (Humira) more attention has driven to target TNF-a in RA therapy. One of the promising approaches to discovery of inhibitors of TNF-a is the inhibition of TACE (Chun et al., 2008; Park et al., 2009; Ott et al., 2008a, b). Efforts are taken to suppress the amount of circulating soluble TNF-a by designing orally active small molecule of TACE inhibitors. "
ABSTRACT: A series of pyrrolidine-based tartrate diamides having selective tumor necrosis factor-α converting enzyme (TACE) inhibitory activity was selected for the three-dimensional quantitative structure–activity relationship (3D-QSAR) studies. Total 76 compounds were selected by considering a high deviation in the biological activity and structural variations. The quality and predictive power of 3D-QSAR, comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) models for the atom-based, centroid/atom-based, data-based alignments were performed. Various models were developed with the help of these alignments. The best model was developed with data-based alignment. The optimal predictive CoMFA model was obtained with cross-validated r 2 = 0.53 with six component, non-cross-validated r 2 = 0.94, standard error of estimates 0.23, F-value = 121.98 and optimal CoMSIA model was obtained with cross-validated r 2 = 0.53 with five components, non-cross-validated r 2 = 0.93, standard error of estimates = 0.24 and F-value = 138.83. These models also showed the best test set prediction with predictive r 2 value of 0.65 and 0.73, respectively. Thus, on the basis of predictive power COMSIA model appeared to be the best one. The statistical parameters from these models indicate that the data are being well fitted and also have high predictive ability. Moreover, the resulting 3D-CoMFA/CoMSIA contour maps provide useful guidance for designing of highly active TACE inhibitors.Medicinal Chemistry Research 09/2013; 22(9). DOI:10.1007/s00044-012-0409-z · 1.40 Impact Factor
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ABSTRACT: Zn-metalloproteinases are an important class of hydrolytic enzymes that are characterized by the presence of a catalytic zinc(II) atom in their active center which is fundamental for proteolytic activity. Metzincins, a superfamily of Zn-metalloproteinases with many structural and functional commonalities among its members, are responsible for the fine tuning of key physiological functions in mammals and the deregulation of their activity is directly connected to numerous inflammatory and degenerative diseases such as arthritis or cancer. Development of small-molecule exogenous inhibitors of metzincins able to re-establish normal proteolytic activity in pathological conditions has been a field of intense research effort for many years but applications in the clinic were not always successful. One of the main reasons for this failure is the uncontrolled action of these inhibitors on target as well as anti-target metzincin family members. Current medicinal efforts have been shifted to the discovery of target-specific inhibitors that will help to improve our understanding of metzincins biological function and provide the basis for the development of safer pharmaceutical agents. This review focuses on the cases of certain medicinally important metzincins [matrix metalloproteinases (MMPs), a disintegrin and metalloproteinases (ADAMs), ADAMs with thrombospondin motifs (ADAMTSs), and procollagen C-proteinase (PCP)] and summarizes the latest advances on the discovery of inhibitors of these enzymes that display improved selectivity profiles.Bioorganic & medicinal chemistry 09/2008; 16(19):8781-94. DOI:10.1016/j.bmc.2008.08.058 · 2.79 Impact Factor
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ABSTRACT: Rheumatoid Arthritis (RA) is one of the most common autoimmune inflammatory conditions, affecting approximately 1% of the adult population worldwide. TNF-alpha is a pleitropic, pro-inflammatory cytokine which plays a pivotal role in the origin and progression of RA and other immune mediated disorders. The success of anti-TNF-alpha biological agents proved that inhibition of TNF-alpha could result in effective control of RA. Since the discovery of anti-TNF-alpha biologicals, much efforts have gone into developing an orally bioavailable small size TNF-alpha antagonist. One of the ways to block TNF-alpha in biological fluids is to inhibit TNF-alpha converting enzyme (TACE). This target has been validated in preclinical trials using TACE inhibitors. But, even after more than a decade no single TACE inhibitor has passed the Phase II clinical trials. Very recently, it has been shown that TACE inhibitors could also be used for inhibition of pathogenic EGFR signaling in cancer. Hence, TACE inhibitors could perform a dual role, in curing not only RA but also certain cancerous conditions. Developments in the field have prompted us to review the research work on TACE inhibitors, especially their structure activity relationships and molecular modeling studies.Bioorganic & medicinal chemistry 01/2009; 17(2):444-59. DOI:10.1016/j.bmc.2008.11.067 · 2.79 Impact Factor