Ultrasound-assisted synthesis of novel chalcone, heterochalcone and bis-chalcone derivatives and the evaluation of their antioxidant properties and as acetylcholinesterase inhibitors
The chalcone and bis-chalcone derivatives have been synthesized under sonication conditions via Claisen-Schmidt condensation with KOH in ethanol at room temperature (20-89%). The structures were established on the basis of NMR, IR, Single-crystal XRD, and MS. The best compound 3u had inhibitory activity (IC50 = 7.50 µM). The synthesis, the antioxidative properties, chemical reactivity descriptors supported
Curcumin possesses an attractive chemical structure with highly conjugated diferuloylmethane core. Curcumin mimics have been designed and prepared with an additional bridged phenyl ring in conjugation. Fourteen diverse analogues were evaluated against a panel of human cancer cell lines. The best analogue of the series i.e. compound 6a exhibited potent cytotoxicity against A431, epidermoid carcinoma cell line (IC50 = 1.5 mu M) and DLDI, colorectal adenocarcinoma cell line (IC50 = 6.9 mu M). In tubulin kinetics experiment, compound 6a destabilized polymerisation process (IC50 = 4.68 mu M). In cell cycle analysis, compound 6a exerted G2/M phase arrest in A431 cells and induced apoptosis. In Ehrlich Ascites Carcinoma in Swiss-albino mice, compound 6a showed 78.6% tumour reduction at 80 mg/kg dose and 57% solid tumour reduction at 150 mg/kg dose. Further, in acute-oral toxicity experiment in rodent model, compound 6a was given in three different oral doses to Swiss albino mice. There were nonsignificant changes in various biochemical parameters and major body organs studied, including their absolute and relative weights. It was tolerable up to 300 mg/kg dose in Swiss -albino mice. The present study shows that the novel curcumin mimic 6a is a safe and efficacious anticancer compound. However, it needs to be optimized for better efficacy. (C) 2018 Elsevier Masson SAS. All rights reserved.
Symmetric Bis-chalcones as a New Type of Breast Cancer Resistance Protein Inhibitors with a Mechanism Different from That of Chromones
作者:Evelyn Winter、Patrícia Devantier Neuenfeldt、Louise Domeneghini Chiaradia-Delatorre、Charlotte Gauthier、Rosendo Augusto Yunes、Ricardo José Nunes、Tânia Beatriz Creczynski-Pasa、Attilio Di Pietro
DOI:10.1021/jm401879z
日期:2014.4.10
Potent ABCG2 inhibitors were recently identified as asymmetric chromones with different types of substituents. We here synthesized symmetric bis-chalcones that were differently substituted and screened for their ability to inhibit mitoxantrone efflux from ABCG2-transfected HEK293 cells. Potent bis-chalcone inhibitors were identified, the efficiency depending on both position of the central ketone groups and the number and positions of lateral methoxy substituents. The best derivative, namely, 1p, was selective for ABCG2 over P-glycoprotein and MRP1, appeared not to be transported by ABCG2, and was at least as active on various drug-selected cancer cells overexpressing ABCG2. Compound 1p stimulated the ABCG2 basal ATPase activity by contrast to a chromone lead that inhibited it, suggesting different mechanisms of interaction. Combination of both types of inhibitors produced synergistic effects, leading to complete inhibition at very low
Design, synthesis and drug resistance reversal potential of novel curcumin mimics Van D
作者:Gaurav Raj Dwivedi、Sadiya Khwaja、Arvind Singh Negi、Swati S. Panda、A. Swaroop Sanket、Sanghamitra Pati、Amit Chand Gupta、Dnyaneshwar Umrao Bawankule、Debabrata Chanda、Rajni Kant、Mahendra P. Darokar
DOI:10.1016/j.bioorg.2020.104454
日期:2021.1
crucial part of plant-based novel discovery of drug from natural resources, a study was done to explore the antibacterial potential of curcumin mimics in combination with antibiotics against multidrug resistant isolates of Pseudomonas aeruginosa. The best candidate Van D, a curcumin mimics reduced the MIC of tetracycline (TET) up to 16 folds against multidrug resistant clinical isolates. VanD further inhibited