Lysosomotropism of Basic Cathepsin K Inhibitors Contributes to Increased Cellular Potencies against Off-Target Cathepsins and Reduced Functional Selectivity
摘要:
The lysosomal cysteine protease cathepsin K is a target for osteoporosis therapy. The arylpiperazine-containing cathepsin K inhibitor CRA-013783/L-006235 (1) displays greater than 4000-fold selectivity against the lysosomal/endosomal antitargets cathepsin B, L, and S. However, 1 and other aryl-piperazine-containing analogues, including balicatib (10), are similar to 10-100-fold more potent in cell-based enzyme occupancy assays than against each purified enzyme. This phenomenon arises from their basic, lipophilic nature, which results in lysosomal trapping. Consistent with its lysosomotropic nature, 1 accumulates in cells and in rat tissues of high lysosome content. In contrast, nonbasic aryl-morpholino-containing analogues do not exhibit lysosomotropic properties. Increased off-target activities of basic cathepsin K inhibitors were observed in a cell-based cathepsin S antigen presentation assay. No potency increases of basic inhibitors in a functional cathepsin K bone resorption whole cell assay were detected. Therefore, basic cathepsin K inhibitors, such as 1, suffer from reduced functional selectivities compared to those predicted using purified enzyme assays.
[EN] BENZOFUROPYRIMIDINONES AS PROTEIN KINASE INHIBITORS<br/>[FR] BENZOFUROPYRIMIDINONES EN TANT QU'INHIBITEURS DE PROTÉINE KINASE
申请人:EXELIXIS INC
公开号:WO2009086264A1
公开(公告)日:2009-07-09
A compound according to formula I: or a pharmaceutically acceptable salt thereof; wherein R1, R2, R3a, R3b, R3c and R3d are as defined in the specification, pharmaceutical compositions thereof, and methods of use thereof.
A compound according to formula I:
or a pharmaceutically acceptable salt thereof; wherein R
1
, R
2
, R
3a
, R
3b
, R
3c
and R
3d
are as defined in the specification, pharmaceutical compositions thereof, and methods of use thereof.
A Convenient New Route to Tetradentate and Pentadentate Macrocyclic Tetraamide Ligands
作者:Leonard C. Rorrer、Stephen D. Hopkins、Michele K. Connors、Daniel W. Lee、Matthew V. Smith、Hilary J. Rhodes、Erich S. Uffelman
DOI:10.1021/ol990155f
日期:1999.10.1
[GRAPHICS]A crucial diamide diamine intermediate in the synthesis of tetradentate macrocyclic tetraamide ligands protected against oxidative decomposition has been synthesized without the use of potentially hazardous organic azide intermediates. This intermediate has also been used to synthesize a new class of pentadentate macrocyclic tetraamide ligands.
BENZOFUROPYRIMIDINONES AS PROTEIN KINASE INHIBITORS