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.
Structure−Activity Relationships in a Series of Orally Active γ-Hydroxy Butenolide Endothelin Antagonists
作者:William C. Patt、Jeremy J. Edmunds、Joseph T. Repine、Kent A. Berryman、Billy R. Reisdorph、Chet Lee、Mark S. Plummer、Aurash Shahripour、Stephen J. Haleen、Joan A. Keiser、Mike A. Flynn、Kathleen M. Welch、Elwood E. Reynolds、Ron Rubin、Brian Tobias、Hussein Hallak、Annette M. Doherty
DOI:10.1021/jm9606507
日期:1997.3.1
to the subnanomolar ETA selective antagonist PD156707, IC50's = 0.3 (ET(A)) and 780 nM (ET(B)). This series of compounds exhibited functional activity exemplified by PD156707. This derivative inhibited the ETA receptor mediated release of arachidonic acid from rabbit renal artery vascular smoothmuscle cells with an IC50 = 1.1 nM and also inhibited the ET-1 induced contraction of rabbit femoral artery
carbonyl/ketone-assisted aerobic oxidative C–H olefination of aromatics with unactivated alkenes has been developed. This protocol involves cross-dehydrogenative Heck-type olefination reaction of various substituted biologically relevant chalcones and aromatic ketones such as acetophenones and chromones with various functionalized unactivated olefins in moderate to good yields. Further, ortho-alkylation of chalcones