Hit-to-lead evaluation of a novel class of sphingosine 1-phosphate lyase inhibitors
摘要:
Inhibition of sphingosine-1-phosphate lyase has recently been proposed as a potential treatment option for inflammatory disorders such as multiple sclerosis, rheumatoid arthritis, and inflammatory bowel disease. In this report we describe our hit-to-lead evaluation of the isoxazolecarboxamide 6, a high-throughput screening hit (in vitro IC50 = 1.0 mu M, cell IC50 = 1.8 mu M), as a novel S1P lyase inhibitor. We were able to establish basic structure-activity relationships around 6 and succeeded in obtaining X-ray structural information which enabled structure-based design. With the discovery of 28, enzyme activity was quickly improved to IC50 = 120 nM and cell potency to IC50 = 230 nM. The main liability in the established isoxazolecarboxamide hit series was determined to be metabolic stability. In particular we identified that future lead-optimization efforts to overcome this problem should focus on blocking the N-dealkylation on the secondary amine. (C) 2016 Elsevier Ltd. All rights reserved.
Hit-to-lead evaluation of a novel class of sphingosine 1-phosphate lyase inhibitors
摘要:
Inhibition of sphingosine-1-phosphate lyase has recently been proposed as a potential treatment option for inflammatory disorders such as multiple sclerosis, rheumatoid arthritis, and inflammatory bowel disease. In this report we describe our hit-to-lead evaluation of the isoxazolecarboxamide 6, a high-throughput screening hit (in vitro IC50 = 1.0 mu M, cell IC50 = 1.8 mu M), as a novel S1P lyase inhibitor. We were able to establish basic structure-activity relationships around 6 and succeeded in obtaining X-ray structural information which enabled structure-based design. With the discovery of 28, enzyme activity was quickly improved to IC50 = 120 nM and cell potency to IC50 = 230 nM. The main liability in the established isoxazolecarboxamide hit series was determined to be metabolic stability. In particular we identified that future lead-optimization efforts to overcome this problem should focus on blocking the N-dealkylation on the secondary amine. (C) 2016 Elsevier Ltd. All rights reserved.
Hit-to-lead evaluation of a novel class of sphingosine 1-phosphate lyase inhibitors
作者:Jurgen Dinges、Christopher M. Harris、Grier A. Wallace、Maria A. Argiriadi、Kara L. Queeney、Denise C. Perron、Eric Dominguez、Tegest Kebede、Kelly E. Desino、Hetal Patel、Anil Vasudevan
DOI:10.1016/j.bmcl.2016.03.043
日期:2016.5
Inhibition of sphingosine-1-phosphate lyase has recently been proposed as a potential treatment option for inflammatory disorders such as multiple sclerosis, rheumatoid arthritis, and inflammatory bowel disease. In this report we describe our hit-to-lead evaluation of the isoxazolecarboxamide 6, a high-throughput screening hit (in vitro IC50 = 1.0 mu M, cell IC50 = 1.8 mu M), as a novel S1P lyase inhibitor. We were able to establish basic structure-activity relationships around 6 and succeeded in obtaining X-ray structural information which enabled structure-based design. With the discovery of 28, enzyme activity was quickly improved to IC50 = 120 nM and cell potency to IC50 = 230 nM. The main liability in the established isoxazolecarboxamide hit series was determined to be metabolic stability. In particular we identified that future lead-optimization efforts to overcome this problem should focus on blocking the N-dealkylation on the secondary amine. (C) 2016 Elsevier Ltd. All rights reserved.