7‘-Substituted Benzothiazolothio- and Pyridinothiazolothio-Purines as Potent Heat Shock Protein 90 Inhibitors
摘要:
We report on the discovery of benzo- and pyridino-thiazolothiopurines as potent heat shock protein 90 inhibitors. The benzothiazole moiety is exceptionally sensitive to substitutions on the aromatic ring with a 7'-substituent essential for activity. Some of these compounds exhibit low nanomolar inhibition activity in a Her-2 degradation assay (28-150 nM), good aqueous solubility, and oral bioavailability profiles in mice. In vivo efficacy experiments demonstrate that compounds of this class inhibit tumor growth in an N87 human colon cancer xenograft model via oral administration as shown with compound 37 (8-(7-chlorobenzothiazol-2- ylsulfanyl)-9-(2-cyclopropylamino-ethyl)-9H-purin-6-ylamine).
7‘-Substituted Benzothiazolothio- and Pyridinothiazolothio-Purines as Potent Heat Shock Protein 90 Inhibitors
摘要:
We report on the discovery of benzo- and pyridino-thiazolothiopurines as potent heat shock protein 90 inhibitors. The benzothiazole moiety is exceptionally sensitive to substitutions on the aromatic ring with a 7'-substituent essential for activity. Some of these compounds exhibit low nanomolar inhibition activity in a Her-2 degradation assay (28-150 nM), good aqueous solubility, and oral bioavailability profiles in mice. In vivo efficacy experiments demonstrate that compounds of this class inhibit tumor growth in an N87 human colon cancer xenograft model via oral administration as shown with compound 37 (8-(7-chlorobenzothiazol-2- ylsulfanyl)-9-(2-cyclopropylamino-ethyl)-9H-purin-6-ylamine).
The development of cytosolic5′-nucleotidase II (cN-II) inhibitors is essential to validate cN-II as a potential target for the reversion of resistance to cytotoxic nucleoside analogues. We previously reported a fragment-based approach combined with molecular modelling, herein, the selected hit-fragments were used again in another computational approach based on the Ilib-diverse (a software enabling
Orally Active Purine-Based Inhibitors of Heat Shock Protein 90
申请人:Kasibhatla R. Srinivas
公开号:US20070129334A1
公开(公告)日:2007-06-07
Novel purine compounds and tautomers and pharmaceutically acceptable salts thereof are described, as are pharmaceutical compositions comprising the same, complexes comprising the same, e.g., HSP90 complexes, and methods of using the same. Methods of using the novel purine compounds of the invention, and tautomers and pharmaceutically acceptable salts thereof, include their use in inhibiting heat shock protein 90's (HSP90's) to thereby treat or prevent HSP90-dependent diseases, e.g., proliferative disorders such as breast cancer.
Orally Active Purine-Based Inhibitors of the Heat Shock Protein 90
作者:Marco A. Biamonte、Jiandong Shi、Kevin Hong、David C. Hurst、Lin Zhang、Junhua Fan、David J. Busch、Patricia L. Karjian、Angelica A. Maldonado、John L. Sensintaffar、Yong-Ching Yang、Adeela Kamal、Rachel E. Lough、Karen Lundgren、Francis J. Burrows、Gregg A. Timony、Marcus F. Boehm、Srinivas R. Kasibhatla
DOI:10.1021/jm0503087
日期:2006.1.1
Orally active Hsp90 inhibitors are of interest as potential chemotherapeutic agents. Recently, fully synthetic 8-benzyladenines and 8-sulfanyladenines such as 4 were disclosed as Hsp90 inhibitors, but these compounds are not water soluble and consequently have unacceptably low oral bioavailabilities. We now report that water-solubility can be achieved by inserting an amino functionality in the N(9) side chain. This results in compounds that are potent, soluble in aqueous media, and orally bioavailable. In an HER-2 degradation assay, the highest potency was achieved with the neopentylamine 42 (HER-2 IC50 = 90 nM). In a murine tumor xenograft model (using the gastric cancer cell line N87), the H3PO4 salts of the amines 38, 39, and 42 induced tumor growth inhibition when administered orally at 200 mg/kg/day. The amines 38, 39, and 42 are the first Hsp90 inhibitors shown to inhibit tumor growth upon oral dosage.
ORALLY ACTIVE PURINE-BASED INHIBITORS OF HEAT SHOCK PROTEIN 90
申请人:Conforma Therapeutics Corporation
公开号:EP1962863A2
公开(公告)日:2008-09-03
[EN] ORALLY ACTIVE PURINE-BASED INHIBITORS OF HEAT SHOCK PROTEIN 90<br/>[FR] INHIBITEURS A BASE DE PURINE ORALEMENT ACTIFS DE LA PROTEINE DE CHOC THERMIQUE 90
申请人:CONFORMA THERAPEUTICS CORP
公开号:WO2007075572A2
公开(公告)日:2007-07-05
[EN] Novel purine compounds and tautomers and pharmaceutically acceptable salts thereof are described, as are pharmaceutical compositions comprising the same, complexes comprising the same, e.g., HSP90 complexes, and methods of using the same. Methods of using the novel purine compounds of the invention,and tautomers and pharmaceutically acceptable salts thereof, include their use in inhibiting heat shock protein 90's (HSP90*s) to thereby treat or prevent HSP90-dependent diseases, e.g., proliferative disorders such as breast cancer. [FR] La présente invention concerne des composés de purine innovants, leurs tautomères et leurs sels pharmaceutiquement acceptables ainsi que les compositions pharmaceutiquement et les complexes qui les comprennent, par exemple les complexes de HSP90, et leurs procédés d'utilisation. Les procédés d'utilisation des composés de purine innovants de l'invention, de leurs tautomères et de leurs sels pharmaceutiquement acceptables incluent leur utilisation pour inhiber les protéines de choc thermique 90 (HSP90) afin de traiter ou de prévenir les maladies liées aux HSP90, par exemple les troubles prolifératifs tels que le cancer du sein.