Isomeric N,N-Bis(cyclohexanol)amine Aryl Esters: The Discovery of a New Class of Highly Potent P-Glycoprotein (Pgp)-dependent Multidrug Resistance (MDR) Inhibitors
摘要:
A new series of P-glycoprotein (Pgp)-dependent multidrug resistance (MDR) inhibitors having a N,N-bis(cyclohexanol)amine scaffold have been designed, following the frozen analog approach. With respect to the parent flexible molecules, the new compounds show improved potency and efficacy. Among them, compound 1d, on anthracycline-resistant erythroleukemia K562 cells, is able to completely reverse Pgp-dependent MDR at low nanomolar concentration.
Isomeric N,N-Bis(cyclohexanol)amine Aryl Esters: The Discovery of a New Class of Highly Potent P-Glycoprotein (Pgp)-dependent Multidrug Resistance (MDR) Inhibitors
摘要:
A new series of P-glycoprotein (Pgp)-dependent multidrug resistance (MDR) inhibitors having a N,N-bis(cyclohexanol)amine scaffold have been designed, following the frozen analog approach. With respect to the parent flexible molecules, the new compounds show improved potency and efficacy. Among them, compound 1d, on anthracycline-resistant erythroleukemia K562 cells, is able to completely reverse Pgp-dependent MDR at low nanomolar concentration.
(reversal fold, RF) and inhibition of P-gp-mediated rhodamine-123 (Rhd 123) efflux tests. The chemical stability of their ester function was evaluated in the experimental conditions utilized (phosphate buffer solution (PBS), bovine serum and in the presence of K562/DOX cells) and in human plasma. The new series of molecules showed very interesting MDR reversing properties; in particular compound 5b (ELF26B)
[EN] N-BENZYL-3-INDENYLACETAMIDES DERIVATIVES FOR TREATING NEOPLASIA<br/>[FR] DERIVES DE N-BENZYL-3-INDENYLACETAMIDES POUR TRAITER DES NEOPLASIES
申请人:CELL PATHWAYS, INC.
公开号:WO1999031065A1
公开(公告)日:1999-06-24
(EN) Substituted condensation products of N-benzyl-3-indenylacetamides of formula (I) with heterocyclic aldehydes are useful for inducing or promoting apoptosis and for arresting uncontrolled neoplastic cell proliferation, and are specifically useful in the arresting and treatment of neoplasias, including precancerous and cancerous lesions.(FR) L'invention concerne des produits de condensation substitués de N-benzyl-3-indénylacétamides de formule (I) avec des aldéhydes hétérocycliques, qui sont utiles pour provoquer ou activer l'apoptose et pour enrayer une prolifération incontrôlée de cellules néoplasiques, et spécifiquement utiles pour enrayer et traiter des néoplasies, y compris des lésions précancéreuses et cancéreuses.
A new series of Pgp-dependent MDR inhibitors having a N,N-bis(cyclohexanol)amine scaffold was designed on the basis of the frozen analogue approach. The scaffold chosen gives origin to different geometrical isomers. The new compounds showed a wide range of potencies and efficacies on doxorubicin-resistant erythroleukemia K562 cells in the pirarubicin uptake assay. The most interesting compounds (isomers of 3) were studied further evaluating their action on the ATPase activity present in rat small intestine membrane vesicles and doxorubicin cytotoxicity potentiation on K562 cells. The latter assay was performed also on the isomers of 4. The four isomers of each set present different behavior in each of these tests. Compound 3d shows the most promising properties as it was able to completely reverse Pgp-dependent pirarubicin extrusion at low nanomolar concentration, inhibited ATPase activity at 5 x 10(-9) and increased the cytotoxicity of doxorubicin with a reversal fold (RF) of 36.4 at 3 mu M concentration.
N-BENZYL-3-INDENYLACETAMIDES DERIVATIVES FOR TREATING NEOPLASIA