olefin with an exocyclic methylene at C2 render PL analogues 47–49 with increased senolytic activity. These α-methylene containing analogues are also more potent than PL in inducing ROS production in WI-38 SCs. Similar to PL, 47–49 reduce the protein levels of oxidation resistance 1 (OXR1), an important oxidative stress response protein that regulates the expression of a variety of antioxidant enzymes
Characterization of the binding properties of SIRT2 inhibitors with a N-(3-phenylpropenoyl)-glycine tryptamide backbone
作者:Päivi H. Kiviranta、Heikki S. Salo、Jukka Leppänen、Valtteri M. Rinne、Sergiy Kyrylenko、Erkki Kuusisto、Tiina Suuronen、Antero Salminen、Antti Poso、Maija Lahtela-Kakkonen、Erik A.A. Wallén
DOI:10.1016/j.bmc.2008.07.059
日期:2008.9
SIRT2 inhibitors with a N-(3-phenylpropenoyl)-glycine tryptamide backbone were studied. This backbone has been developed in our group, and it is derived from a compound originally found by virtual screening. In addition, compounds with a smaller 3-phenylpropenoic acid tryptamide backbone were also included in the study. Binding modes for the new compounds and the previously reported compounds were analyzed with molecular modelling methods. The approach, which included a combination of molecular dynamics, molecular docking and cluster analysis, showed that certain docking poses were favourable despite the conformational variation in the target protein. The N-(3-phenylpropenoyl)-glycine tryptamide backbone is also a good backbone for SIRT2 inhibitors, and the series of compounds includes several potent SIRT2 inhibitors. (C) 2008 Elsevier Ltd. All rights reserved.
Piperlongumine (piplartine) and analogues: Antiproliferative microtubule-destabilising agents
作者:Mary J. Meegan、Seema Nathwani、Brendan Twamley、Daniela M. Zisterer、Niamh M. O'Boyle
DOI:10.1016/j.ejmech.2016.09.048
日期:2017.1
Piperlongumine (piplartine, 1) is a small molecule alkaloid that is receiving intense interest due to its antiproliferative and anticancer activities. We investigated the effects of 1 on tubulin and microtubules. Using both an isolated tubulin assay, and a combination of sedimentation and western blotting, we demonstrated that 1 is a tubulin-destabilising agent. This result was confirmed by immunofluorescence and confocal microscopy, which showed that microtubules in MCF-7 breast cancer cells were depolymerized when treated with 1. We synthesised a number of analogues of 1 to explore structure-activity relationships. Compound 13 had the best cytotoxic profile of this series, showing potent effects in human breast carcinoma MCF-7 cells whilst being relatively non-toxic to non-tumorigenic MCF-10a cells. These compounds will be further developed as potential clinical candidates for the treatment of breast cancer. (C) 2016 Elsevier Masson SAS. All rights reserved.
Piperlongumine derived cyclic sulfonamides (sultams): Synthesis and in vitro exploration for therapeutic potential against HeLa cancer cell lines
作者:Nitin P. Lad、Sarang Kulkarni、Rajiv Sharma、Malcolm Mascarenhas、Mahesh R. Kulkarni、Shivaji S. Pandit
DOI:10.1016/j.ejmech.2016.12.022
日期:2017.1
A novel modification of piperlongumine is designed, bearing a cyclic sulphonamide (sultam) and its synthesis is described. For the first time herein we report the synthesis and biological evaluation of the natural product derived cyclic sulfonamides using Grubbs second generation catalyst (Grubbs II) via ring closing metathesis approach. Synthesis of a series of piperlongumine derived sultams is done
Reductive Asymmetric Aza‐Mislow‐Evans Rearrangement by 1,3,2‐Diazaphospholene Catalysis**
作者:Guoting Zhang、Nicolai Cramer
DOI:10.1002/anie.202301076
日期:——
A 1,3,2-diazaphospholene-catalyzed three-step cascade transformation of chiral N-sulfinyl acrylamides comprised of a conjugate reduction, enantiospecific [2,3]-sigmatropic aza-Mislow-Evans rearrangement, and subsequent S−O bond reductive cleavage provides access to synthetically valuable enantio-enriched α-hydroxy amides. Various α-hydroxy amides are obtained in good yields and high enantioselectivities