Hydrophilic, Pro-Drug Analogues of T138067 Are Efficacious in Controlling Tumor Growth In Vivo and Show a Decreased Ability To Cross the Blood Brain Barrier
作者:Steven M. Rubenstein、Vijay Baichwal、Holger Beckmann、David L. Clark、Walter Frankmoelle、Daniel Roche、Edit Santha、Susan Schwender、Martin Thoolen、Qiuping Ye、Juan C. Jaen
DOI:10.1021/jm000478d
日期:2001.10.1
The novel anticancer compound T138067 is an irreversible inhibitor of tubulin polymerization. Amides 3-6 were synthesized using standard methodologies and determined to be significantly less lipophilic than T138067 based on logP calculations. Tubulin polymerization and [H-3]-T138067 competition assays revealed that these amides are pro-drugs for parent aniline 2. Amides 3-5 showed no detectable signs of crossing the blood brain barrier, while amide 6 was found in extremely small amounts (12 ng/g of brain tissue). Aniline 2, which was formed in vivo from these amides, was found in significantly smaller amounts (approximately 20 to > 5000 times) in the brain than when 2 was administered directly. The in vivo efficacy of amide 6 approached that of T138067 and was better tolerated when administered to athymic. nude mice bearing MX-1 human mammary tumor xenografts.