[EN] EMETINE DERIVATIVES, PRODRUGS CONTAINING SAME, AND METHODS OF TREATING CONDITIONS USING SAME<br/>[FR] DÉRIVÉS D'ÉMÉTINE, PRODROGUES CONTENANT CES DÉRIVÉS ET PROCÉDÉS DE TRAITEMENT DE TROUBLES AU MOYEN DE CES PRODROGUES
申请人:UNIV HOWARD
公开号:WO2012162175A1
公开(公告)日:2012-11-29
Compounds are provided herein which are emetine derivatives that can be used as prodrugs which selectively undergo activation to release emetine in specific cellular conditions. In one aspect, a blocking group is incorporated onto the emetine molecule by the derivization of the N2'-position with moieties that can be selectively removed by hydrolysis in the cancer/tumor microenvironment. Such compounds are less cytotoxic than emetine and are substantially inactive in non-cancerous cells. In one aspect, the compounds described herein can be used for the treatment of metastatic and non-metastatic cancers, including, for example, breast cancer, prostate cancer, lung cancer, and leukemia.
Design, Synthesis, and Evaluation of pH-Dependent Hydrolyzable Emetine Analogues as Treatment for Prostate Cancer
作者:Emmanuel S. Akinboye、Marc D. Rosen、Samuel R. Denmeade、Bernard Kwabi-Addo、Oladapo Bakare
DOI:10.1021/jm300426q
日期:2012.9.13
The N-2' position of the natural product emetine has been derivatized to thiourea, urea, sulfonamide, dithiocarbamate, carbamate, and pH responsive hydrolyzable amide analogues. In vitro studies of these analogues in PC3 and LNCaP prostate cancer cell lines showed that the analogues are generally less cytotoxic (average IC50 ranging from 0.079 to 10 mu M) than emetine (IC50 ranging from 0.0237 to 0.0329 mu M). The pH sensitive sodium dithiocarbamate salt 13 and the amide analogues 21, 22, 26 (obtained from maleic and citraconic anhydrides) showed the most promise as acid-activatable prodrugs under mildly acidic conditions found in the cancer microenvironment. These prodrugs released 12-83% of emetine at pH 6.5 and 41-95% emetine at pH 5.5. Compounds 13 and 26 were further shown to exhibit increased cytotoxicity in PC3 cell culture medium that was already below pH 7.0 at the time of treatment.
Design, synthesis and cytotoxicity studies of dithiocarbamate ester derivatives of emetine in prostate cancer cell lines
作者:Emmanuel S. Akinboye、Zebalda D. Bamji、Bernard Kwabi-Addo、David Ejeh、Robert L. Copeland、Samuel R. Denmeade、Oladapo Bakare
DOI:10.1016/j.bmc.2015.06.072
日期:2015.9
salt 1, all the dithiocarbamate ester analogs (2 and 4a–4g) displayed lower cytotoxicity than compound 1 (PC3, IC50 = 0.087 ± 0.005 μM; DU145, IC50 = 0.079 ± 0.003 μM and LNCaP, IC50 = 0.079 ± 0.003 μM) on day 7 of treatment. Consequently, it appears that S-alkylation of compound 1 leads to a more stable dithiocarbamate ester derivative that resulted in lower anticancer activity in the prostate cancer