Interrogation of the Structure–Activity Relationship of a Lipophilic Nitroaromatic Prodrug Series Designed for Cancer Gene Therapy Applications
作者:Amir Ashoorzadeh、Alexandra M. Mowday、Christopher P. Guise、Shevan Silva、Matthew R. Bull、Maria R. Abbattista、Janine N. Copp、Elsie M. Williams、David F. Ackerley、Adam V. Patterson、Jeff B. Smaill
DOI:10.3390/ph15020185
日期:——
NfsA_Ec activity, suggesting that metabolite loss from the cell of origin into media during 2D monolayer assays could mask cytotoxicity. Three prodrugs were identified as bono fide AKR1C3-negative candidates whilst maintaining activity with NfsA_Ec. These were converted to their phosphate ester pre-prodrugs before being taken forward into in vivo therapeutic efficacy studies. Ultimately, 2-(5-(bis(2-b
PR-104A 是一种双重缺氧/硝基还原酶基因治疗前药,因为它能够经历一个或两个电子还原为其细胞毒性物种。它已在临床前 GDEPT 研究中进行了广泛评估,但脱靶人类醛酮还原酶 AKR1C3 介导的激活限制了其使用。对这种化学支架的重新评估先前已将 SN29176 确定为 PR-104A 的改进的缺氧激活前药类似物,它没有 AKR1C3 激活。然而,在 GDEPT 环境中使用时需要优化 SN29176 的旁观者效应,以补偿在当前基因治疗载体中经常观察到的治疗性基因转移的不均匀分布。由市售的 3,4-二氟苯甲醛合成了 8 种类似物的亲油系列。计算的辛醇-水分配系数 (LogD7.4) 跨越 > 2 个数量级。使用表达大肠杆菌 NfsA 硝基还原酶 (NfsA_Ec) 或 AKR1C3 的同基因 HCT116 细胞进行 2D 抗增殖和 3D 多细胞层测定,以确定酶活性和测量旁观者效应。观察到 NfsA_Ec