Antiandrogenic activity of anthranilic acid ester derivatives as novel lead structures to inhibit prostate cancer cell proliferation
摘要:
A plant extract from the fruits of saw palmetto, which is currently used to treat the androgen‐dependent benign prostatic hyperplasia and PCa, served as source for new structure variants. We investigated the antiandrogenic potential of an ethanolic total extract and one of its main aromatic components anthranilic acid. An androgen receptor‐antagonistic (antiandrogenic) effect of the extract was evident, and although anthranilic acid itself revealed no remarkable effect, its methyl ester, methyl anthranilate, exhibited antiandrogenic potential. Based on this chemical structure, we synthesized and investigated the antiandrogenic activity of four AnA ester derivatives, which were either novel or only little described in literature. These AnA esters inhibit the androgen‐dependent transactivation of both the wild‐type (wt) androgen receptor and the androgen receptor point mutant T877A, which often occurs in refractory PCa. Moreover, they inhibit the androgen receptor‐induced expression of the endogenous prostate‐specific antigen. Importantly, AnA esters repress the growth of human PCa cells. Deletion analyses of androgen receptor propose that the antiandrogenic effect of anthranilic acid esters is mediated by the ligand‐binding domain, most likely through direct binding, without affecting androgen receptor protein levels. Taken together, the data suggest antiandrogenic potential of anthranilic acid ester derivatives, which can serve as lead structures for novel antiandrogens.
Compounds of formula (I): wherein Ar represents an, optionally substituted, aryl or heteroaryl group, R represents an, optionally substituted, aryl or heteroaryl group, an optionally substituted straight or branched chain C
1.10
-alkyl, R
1
is H or methyl, X is an extender group, n is 0 or an integer between 1 and 12 inclusive, A is a polyol residue wherein the unsubstituted polyol from which the residue is derived has at least y OH groups, and y is an integer>1, can easily be prepared, and are useful as synergists in radiation curing.
AMINE SYNERGISTS AND THEIR USE IN RADIATION CURING
申请人:Sun Chemical B.V.
公开号:EP2550250B1
公开(公告)日:2020-06-24
US8952190B2
申请人:——
公开号:US8952190B2
公开(公告)日:2015-02-10
[EN] SYNERGISTS<br/>[FR] AGENTS SYNERGISTES
申请人:SUN CHEMICAL BV
公开号:WO2011117591A2
公开(公告)日:2011-09-29
Compounds of formula (I): wherein Ar represents an, optionally substituted, aryl or heteroaryl group, R represents an, optionally substituted, aryl or heteroaryl group, an optionally substituted straight or branched chain C1.10-alkyl, R1 is H or methyl, X is an extender group, n is 0 or an integer between 1 and 12 inclusive, A is a polyol residue wherein the unsubstituted polyol from which the residue is derived has at least y OH groups, and y is an integer>1, can easily be prepared, and are useful as synergists in radiation curing.