Synthesis and in vitro anti-leukemic activity of structural analogues of JS-K, an anti-cancer lead compound
摘要:
Structural analogues of JS-K, an anti-cancer lead compound, were prepared and their in vitro anti-leukemic activity was determined. The rate of nitric oxide release from the corresponding diazeniumdiolate anions did not appear to affect the anti-leukemic activity of the prodrug forms. Two compounds with potent inhibitory activity and a potentially favorable toxicological profile were identified. (C) 2007 Elsevier Ltd. All rights reserved.
Antitumor Activity of JS-K [O2-(2,4-Dinitrophenyl) 1-[(4-Ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate] and Related O2-Aryl Diazeniumdiolates in Vitro and in Vivo
摘要:
The literature provides evidence that metabolic nitric oxide ( NO) release mediates the cytotoxic activities ( against human leukemia and prostate cancer xenografts in mice) of JS-K, a compound of structure R2N-(O)=NO-Ar for which R2N is 4-(ethoxycarbonyl) piperazin-1-yl and Ar is 2,4-dinitrophenyl. Here we present comparative data on the potencies of JS-K and 41 other O-2-arylated diazeniumdiolates as inhibitors of HL-60 human leukemia cell proliferation, as well as in the NCI 51-cell-line screen for six of them. The data show JS-K to be the most potent of the 42 in both screens and suggest that other features of its structure and metabolism besides NO release may contribute importantly to its activity. Results with control compounds implicate JS-K's arylating ability, and the surprisingly low IC50 value of the N-(ethoxycarbonyl) piperazine byproduct of NO release suggests a role for the R2N moiety. In addition to the above-mentioned in vivo activities, JS-K is shown here to be carcinostatic in a rat liver cancer model.