Identification of new aminoacid amides containing the imidazo[2,1-b]benzothiazol-2-ylphenyl moiety as inhibitors of tumorigenesis by oncogenic Met signaling
摘要:
The Met receptor tyrosine kinase is a promising target in anticancer therapies for its role during tumor evolution and resistance to treatment. It is characterized by an unusual structural plasticity as its active site accepts different inhibitor binding modes. Such feature can be exploited to identify distinct agents targeting tumor dependence and/or resistance by oncogenic Met. Here we report the identification of bioactive agents, featuring a new 4-(imidazo[2,1-b]benzothiazol-2-yl)phenyl moiety, targeting cancer cells dependent on oncogenic Met. One of these compounds (7c; Triflorcas) impairs survival, anchorage-independent growth, and in vivo tumorigenesis, without showing side effects. Our medicinal chemistry strategy was based on an in-house Met-focused library of aminoacid-amide derivatives enriched through structure-based computer modeling, taking into account the Met multiple-binding-mode feature. Altogether, our findings show how a rational structure-based drug design approach coupled to cell-based drug evaluation strategies can be applied in medicinal chemistry to identify new agents targeting a given oncogenic-dependency setting. (C) 2011 Elsevier Masson SAS. All rights reserved.
Novel p53 Inactivators with Neuroprotective Action: Syntheses and Pharmacological Evaluation of 2-Imino-2,3,4,5,6,7-hexahydrobenzothiazole and 2-Imino-2,3,4,5,6,7-hexahydrobenzoxazole Derivatives
作者:Xiaoxiang Zhu、Qian-sheng Yu、Roy G. Cutler、Carsten W. Culmsee、Harold W. Holloway、Debomoy K. Lahiri、Mark P. Mattson、Nigel H. Greig
DOI:10.1021/jm020044d
日期:2002.11.1
feature of several neurodegenerative disorders, including Alzheimer's disease, 2 and novel analogues (3-16) were synthesized to (i) assess the value of tetrahydrobenzothiazole analogues as neuroprotective agents and (ii) define the structuralrequirements for p53 inactivation. Not only did 2 exhibit neuroprotective activity in both tissue culture and in vivo stroke models but also compounds 6, 7, 10, 13
Tetrahydrobenzothiazole analogues as neuroprotective agents
申请人:——
公开号:US20040067991A1
公开(公告)日:2004-04-08
This invention relates generally to tetrahydrobenzothiazole analogues and tetrahydrobenzooxyzole analogues, to pharmaceutical compositions which include these compounds and a pharmaceutically acceptable carrier, and to methods of treatment using these compounds. The invention also encompasses pharmaceutically acceptable esters, amides, and salts of such compounds. The invention further provides a method of reducing or delaying apoptosis in a population of cells, comprising contacting the population of cells with a tetrahydrobenzothiazole analogue or a tetrahydrobenzooxyzole analogue, thereby reducing or delaying apoptosis in the population of cells.
TETRAHYDROBENZOTHIAZOLE ANALOGUES AS NEUROPROTECTIVE AGENTS
申请人:Greig Nigel H
公开号:US20080319032A1
公开(公告)日:2008-12-25
This invention relates generally to tetrahydrobenzothiazole analogues and tetrahydrobenzooxyzole analogues, to pharmaceutical compositions which include these compounds and a pharmaceutically acceptable carrier, and to methods of treatment using these compounds. The invention also encompasses pharmaceutically acceptable esters, amides, and salts of such compounds. The invention further provides a method of reducing or delaying apoptosis in a population of cells, comprising contacting the population of cells with a tetrahydrobenzothiazole analogue or a tetrahydrobenzooxyzole analogue, thereby reducing or delaying apoptosis in the population of cells.
Several neurological disorders manifest symptoms that result from the degeneration and death of specific neurons. p53 is an important modulator of cell death, and its inhibition could be a therapeutic approach to several neuropathologies. Here, we report the design, synthesis, and biological evaluation of novel p53 inhibitors based on the imino-tetrahydrobenzothiazole scaffold. By performing studies on their mechanism of action, we find that cyclic analogue 4b and its open precursor 2b are more potent than pifithrin-alpha (PFT-R), which is known to block p53 pro-apoptotic activity in vitro and in vivo without acting on other proapoptotic pathways. Using spectroscopic methods, we also demonstrate that open form 2b is more stable than 4b in biological media. Compound 2b is converted into its corresponding active cyclic form through an intramolecular dehydration process and was found two log values more active in vivo than PFT-alpha. Thus, 2b can be considered as a new prodrug prototype that prevents in vivo p53-triggered cell death in several neuropathologies and possibly reduces cancer therapy side effects.
2-Aminothiazoles: A new class of agonist allosteric enhancers of A1 adenosine receptors
作者:Mahendra D. Chordia、Lauren J. Murphree、Timothy L. Macdonald、Joel Linden、Ray A. Olsson
DOI:10.1016/s0960-894x(02)00236-6
日期:2002.6
This report describes the synthesis and structure-activity relationships of a new class of A(1) adenosine receptor agonist allosteric enhancers, 2-aminothiazolium salts. The EC50 of compounds 6a, 6b, 7, and 8 were 0.3, 4.5, 3.8, and 1.2 muM, substantially lower than that of the 'Gold Standard' 2-amino-3-benzoyl thiophene (PD 81,723), which has an EC50 of 38 muM. (C) 2002 Elsevier Science Ltd. All rights reserved.