Dipeptidyl aspartyl fluoromethylketones as potent caspase inhibitors: SAR of the N-protecting group
摘要:
This article describes the synthesis and biological evaluation of a group of N-protected Val-Asp-fmk as caspase inhibitors. The protecting group was found to contribute to caspase-3 inhibiting activity, and compounds with a large group such as Cbz are more active than compounds with a small group such as Ac. Compounds with more hydrophobic protecting groups were found to be more active in cell apoptosis protection assays, probably due to increased cell permeability. MX1122,2,4-di-Cl-Cbz-Val-Aspfmk, is identified as a potent broad-spectrum caspase inhibitor and is selective for caspases versus other proteases, with good activity in the cell apoptosis protection assays as well as good efficacy in the mouse liver apoptosis model. (C) 2004 Elsevier Ltd. All rights reserved.
Dipeptidyl aspartyl fluoromethylketones as potent caspase inhibitors: SAR of the N-protecting group
摘要:
This article describes the synthesis and biological evaluation of a group of N-protected Val-Asp-fmk as caspase inhibitors. The protecting group was found to contribute to caspase-3 inhibiting activity, and compounds with a large group such as Cbz are more active than compounds with a small group such as Ac. Compounds with more hydrophobic protecting groups were found to be more active in cell apoptosis protection assays, probably due to increased cell permeability. MX1122,2,4-di-Cl-Cbz-Val-Aspfmk, is identified as a potent broad-spectrum caspase inhibitor and is selective for caspases versus other proteases, with good activity in the cell apoptosis protection assays as well as good efficacy in the mouse liver apoptosis model. (C) 2004 Elsevier Ltd. All rights reserved.
The present invention is directed to novel dipeptide thereof, represented by the general Formula I:
1
where R
1
-R
3
, X and Y are defined herein. The present invention also relates to the discovery that compounds having Formula I are potent inhibitors of caspases and apoptotic cell death. Therefore, the inhibitors of this invention can retard or block cell death in a variety of clinical conditions in which the loss of cells, tissues or entire organs occurs.