1,4,5-Trisubstituted Imidazole-Based p53–MDM2/MDMX Antagonists with Aliphatic Linkers for Conjugation with Biological Carriers
摘要:
The tumor suppressor protein p53, the "guardian of the genome", is inactivated in nearly all cancer types by mutations in the TPS3 gene or by overexpression of its negative regulators, oncoproteins MDM2/MDMX. Recovery of p53 function by disrupting the p53-MDM2/MDMX interaction using small-molecule antagonists could provide an efficient nongenotoxic anticancer therapy. Here we present the syntheses, activities, and crystal structures of the p53-MDM2/MDMX inhibitors based on the 1,4,5-trisubstituted imidazole scaffold which are appended with aliphatic linkers that enable coupling to bioactive carriers. The compounds have favorable properties at both biochemical and cellular levels. The most effective compound 19 is a tight binder of MDM2 and activates p53 in cancer cells that express the wild-type p53, leading to cell cycle arrest and growth inhibition. Crystal structures reveal that compound 19 induces MDM2 dimerization via the aliphatic linker. This unique dimerization-binding mode opens new prospects for the optimization of the p53-MDM2/MDMX inhibitors and conjugation with bioactive carriers.
Artificial Macrocycles as Potent p53–MDM2 Inhibitors
作者:Natalia Estrada-Ortiz、Constantinos G. Neochoritis、Aleksandra Twarda-Clapa、Bogdan Musielak、Tad A. Holak、Alexander Dömling
DOI:10.1021/acsmedchemlett.7b00219
日期:2017.10.12
Based on a combination of an Ugi four component reaction and a ring closing metathesis, a library of novel artificial macrocyclic inhibitors of the p53–MDM2 interaction was designed and synthesized. These macrocycles, alternatively to stapled peptides, target for the first time the large hydrophobic surface area formed by Tyr67, Gln72, His73, Val93, and Lys94 yielding derivatives with affinity to MDM2
基于Ugi四组分反应和闭环易位的组合,设计并合成了新型的人工大环抑制剂p53–MDM2相互作用的文库。这些大环化合物,除装钉肽外,首次靶向由Tyr67,Gln72,His73,Val93和Lys94形成的大疏水表面积,从而产生对纳摩尔摩尔范围内的MDM2具有亲和力的衍生物。使用荧光偏振(FP)分析和1 H – 15 N二维HSQC核磁共振实验评估了它们与MDM2的结合亲和力。
Hitting on the move: Targeting intrinsically disordered protein states of the MDM2-p53 interaction
作者:Constantinos G. Neochoritis、Jack Atmaj、Aleksandra Twarda-Clapa、Ewa Surmiak、Lukasz Skalniak、Lisa-Maria Köhler、Damian Muszak、Katarzyna Kurpiewska、Justyna Kalinowska-Tłuścik、Barbara Beck、Tad A. Holak、Alexander Dömling
DOI:10.1016/j.ejmech.2019.111588
日期:2019.11
Intrinsically disordered proteins are an emerging class of proteins without a folded structure and currently disorder-based drug targeting remains a challenge. p53 is the principal regulator of cell division and growth whereas MDM2 consists its main negative regulator. The MDM2-p53 recognition is a dynamic and multistage process that amongst other, employs the dissociation of a transient alpha-helical N-terminal "lid" segment of MDM2 from the proximity of the p53-complementary interface. Several small molecule inhibitors have been reported to inhibit the formation of the p53-MDM2 complex with the vast majority mimicking the p53 residues Phe19, Trp23 and Leu26. Recently, we have described the transit from the 3-point to 4-point pharmacophore model stabilizing this intrinsically disordered N-terminus by increasing the binding affinity by a factor of 3. Therefore, we performed a thorough SAR analysis, including chiral separation of key compound which was evaluated by FP and 2D NMR. Finally, p53-specific anti-cancer activity towards p53-wild-type cancer cells was observed for several representative compounds. (C) 2019 Elsevier Masson SAS. All rights reserved.
MOF-derived cobalt nanoparticles catalyze a general synthesis of amines
作者:Rajenahally V. Jagadeesh、Kathiravan Murugesan、Ahmad S. Alshammari、Helfried Neumann、Marga-Martina Pohl、Jörg Radnik、Matthias Beller
DOI:10.1126/science.aan6245
日期:2017.10.20
preparation entailed template assembly of cobalt-diamine-dicarboxylic acid metal organic frameworks on carbon and subsequent pyrolysis under inert atmosphere. The resulting stable and reusable catalysts were active for synthesis of primary, secondary, tertiary, and N-methylamines (more than 140 examples). The reaction couples easily accessible carbonyl compounds (aldehydes and ketones) with ammonia, amines
1,4,5-Trisubstituted Imidazole-Based p53–MDM2/MDMX Antagonists with Aliphatic Linkers for Conjugation with Biological Carriers
作者:Aleksandra Twarda-Clapa、Sylwia Krzanik、Katarzyna Kubica、Katarzyna Guzik、Beata Labuzek、Constantinos G. Neochoritis、Kareem Khoury、Kaja Kowalska、Miroslawa Czub、Grzegorz Dubin、Alexander Dömling、Lukasz Skalniak、Tad A. Holak
DOI:10.1021/acs.jmedchem.7b00104
日期:2017.5.25
The tumor suppressor protein p53, the "guardian of the genome", is inactivated in nearly all cancer types by mutations in the TPS3 gene or by overexpression of its negative regulators, oncoproteins MDM2/MDMX. Recovery of p53 function by disrupting the p53-MDM2/MDMX interaction using small-molecule antagonists could provide an efficient nongenotoxic anticancer therapy. Here we present the syntheses, activities, and crystal structures of the p53-MDM2/MDMX inhibitors based on the 1,4,5-trisubstituted imidazole scaffold which are appended with aliphatic linkers that enable coupling to bioactive carriers. The compounds have favorable properties at both biochemical and cellular levels. The most effective compound 19 is a tight binder of MDM2 and activates p53 in cancer cells that express the wild-type p53, leading to cell cycle arrest and growth inhibition. Crystal structures reveal that compound 19 induces MDM2 dimerization via the aliphatic linker. This unique dimerization-binding mode opens new prospects for the optimization of the p53-MDM2/MDMX inhibitors and conjugation with bioactive carriers.