From Sphingosine Kinase to Dihydroceramide Desaturase: A Structure–Activity Relationship (SAR) Study of the Enzyme Inhibitory and Anticancer Activity of 4-((4-(4-Chlorophenyl)thiazol-2-yl)amino)phenol

详细信息    查看全文

• 作者：Luigi Aurelio ; Carmen V. Scullino ; Melissa R. Pitman ; Anna Sexton ; Victoria Oliver ; Lorena Davies ; Richard J. Rebello ; Luc Furic ; Darren J. Creek ; Stuart M. Pitson ; Bernard L. Flynn
• 刊名：Journal of Medicinal Chemistry
• 出版年：2016
• 出版时间：February 11, 2016
• 年：2016
• 卷：59
• 期：3
• 页码：965-984
• 全文大小：876K
• ISSN：1520-4804

文摘

The sphingosine kinase (SK) inhibitor, SKI-II, has been employed extensively in biological investigations of the role of SK1 and SK2 in disease and has demonstrated impressive anticancer activity in vitro and in vivo. However, interpretations of results using this pharmacological agent are complicated by several factors: poor SK1/2 selectivity, additional activity as an inducer of SK1-degradation, and off-target effects, including its recently identified capacity to inhibit dihydroceramide desaturase-1 (Des1). In this study, we have delineated the structure–activity relationship (SAR) for these different targets and correlated them to that required for anticancer activity and determined that Des1 inhibition is primarily responsible for the antiproliferative effects of SKI-II and its analogues. In the course of these efforts, a series of novel SK1, SK2, and Des1 inhibitors have been generated, including compounds with significantly greater anticancer activity.