Cytotoxic 3,4,5-trimethoxychalcones as mitotic arresters and cell migration inhibitors
作者:Lívia B. Salum、Wanessa F. Altei、Louise D. Chiaradia、Marlon N.S. Cordeiro、Rafael R. Canevarolo、Carolina P.S. Melo、Evelyn Winter、Bruno Mattei、Hikmat N. Daghestani、Maria Cláudia Santos-Silva、Tânia B. Creczynski-Pasa、Rosendo A. Yunes、José A. Yunes、Adriano D. Andricopulo、Billy W. Day、Ricardo J. Nunes、Andreas Vogt
DOI:10.1016/j.ejmech.2013.02.037
日期:2013.5
Based on classical colchicine site ligands and a computational model of the colchicine binding site on beta tubulin, two classes of chalcone derivatives were designed, synthesized and evaluated for inhibition of tubulin assembly and toxicity in human cancer cell lines. Docking studies suggested that the chalcone scaffold could fit the colchicine site on tubulin in an orientation similar to that of the natural product. In particular, a 3,4,5-trimethoxyphenyl ring adjacent to the carbonyl group appeared to benefit the ligand-tubulin interaction, occupying the same subcavity as the corresponding moiety in colchicine. Consistent with modeling predictions, several 3,4,5-trimethoxychalcones showed improved cytotoxicity to murine acute lymphoblastic leukemia cells compared with a previously described parent compound, and inhibited tubulin assembly in vitro as potently as colchicine. The most potent chalcones inhibited the growth of human leukemia cell lines at nanomolar concentrations, caused microtubule destabilization and mitotic arrest in human cervical cancer cells, and inhibited human breast cancer cell migration in scratch wound and Boyden chamber assays. (C) 2013 Elsevier Masson SAS. All rights reserved.
Synthesis, Biological Evaluation, And Molecular Modeling of Chalcone Derivatives As Potent Inhibitors of Mycobacterium tuberculosis Protein Tyrosine Phosphatases (PtpA and PtpB)
Tuberculosis (TB) is a major infectious disease caused by Mycobacterium tuberculosis (Mtb). According to the World Health Organization (WHO), about 1.8 million people die from TB and 10 million new cases are recorded each year. Recently, a new series of naphthylchalcones has been identified as inhibitors of Mtb protein tyrosine phosphatases (PTPs). In this work, 100 chalcones were designed, synthesized, and investigated for their inhibitory properties against MtbPtps. Structure-activity relationships (SAR) were developed, leading to the discovery of new potent inhibitors with IC50 values in the low-micromolar range. Kinetic studies revealed competitive inhibition and high selectivity toward the Mtb enzymes. Molecular modeling investigations were carried out with the aim of revealing the most relevant structural requirements underlying the binding affinity and selectivity of this series of inhibitors as potential anti-TB drugs.
The Synthesis of Chalcones as Anticancer Prodrugs and their Bioactivation in CYP1 Expressing Breast Cancer Cells
作者:Ketan C. Ruparelia、Keti Zeka、Taeeba Ijaz、Dyan N. Ankrett、Nicola E. Wilsher、Paul C. Butler、Hoon L. Tan、Sabahat Lodhi、Avninder S. Bhambra、Gerard A. Potter、Randolph R.J. Arroo、Kenneth J.M. Beresford
DOI:10.2174/1573406414666180112120134
日期:2018.5.11
Background: Although the expression levels of many P450s differ between tumour and
corresponding normal tissue, CYP1B1 is one of the few CYP subfamilies which is significantly
and consistently overexpressed in tumours. CYP1B1 has been shown to be active within tumours
and is capable of metabolising a structurally diverse range of anticancer drugs. Because of this,
and its role in the activation of procarcinogens, CYP1B1 is seen as an important target for anticancer
drug development.
Objective: To synthesise a series of chalcone derivatives based on the chemopreventative agent
DMU-135 and investigate their antiproliferative activities in human breast cancer cell lines which
express CYP1B1 and CYP1A1.
Method: A series of chalcones were synthesised in yields of 43-94% using the Claisen-Schmidt
condensation reaction. These were screened using a MTT assay against a panel of breast cancer
cell lines which have been characterised for CYP1 expression.
Result: A number of derivatives showed promising antiproliferative activities in human breast
cancer cell lines which express CYP1B1 and CYP1A1, while showing significantly lower toxicity
towards a non-tumour breast cell line with no CYP expression. Experiments using the CYP1 inhibitors
acacetin and α-naphthoflavone provided supporting evidence for the involvement of CYP1
enzymes in the bioactivation of these compounds.
Conclusion: Chalcones show promise as anticancer agents with evidence suggesting that CYP1
activation of these compounds may be involved.