Novel Multifunctional Acyloxyalkyl Ester Prodrugs of 5-Aminolevulinic Acid Display Improved Anticancer Activity Independent and Dependent on Photoactivation
作者:Gili Berkovitch、Dvir Doron、Abraham Nudelman、Zvi Malik、Ada Rephaeli
DOI:10.1021/jm8008794
日期:2008.12.11
Multifunctional acyloxyalkyl ester prodrugs of 5-aminolevulinic acid in cancer cell lines inhibited the proteasome and induced apoptosis and heme synthesis. The most potent prodrug was butyryloxymethyl 5-amino-4-oxopentanoate (1a). The metabolically released formaldehyde from the prodrugs was the dominant factor affecting cell viability by a ROS-dependent mechanism and was responsible for rapid phosphorylation
5-氨基乙酰丙酸的多功能酰氧基烷基酯前药在癌细胞系中抑制蛋白酶体并诱导凋亡和血红素合成。最有效的前药是5-氨基-4-氧戊酸丁酰氧基甲基酯(1a)。从前药中代谢释放的甲醛是通过ROS依赖性机制影响细胞生存力的主要因素,并负责H2AX的快速磷酸化,细胞存活蛋白c-myc的抑制和p21表达的瞬时升高。1a与2a的区别在于释放丁酸而不是新戊酸,它是血红素和乙酰化H4表达的更有效诱导剂,并通过激活半胱天冬酶9诱导凋亡。1a和1b特别增加了光敏剂原卟啉9的水平。通过光动力疗法(PDT)导致细胞死亡增加。这些多功能前药相对于5-ALA的优势在于,它们在癌细胞杀灭的非PDT机制中具有更强的效力,并且还具有增强PDT的能力。