[EN] DUAL ACTION NITRIC OXIDE DONORS AND THEIR USE AS ANTIMICROBIAL AGENTS<br/>[FR] DONNEURS D'OXYDE NITRIQUE À DOUBLE ACTION ET LEUR UTILISATION COMME AGENTS ANTIMICROBIENS
申请人:NEWSOUTH INNOVATIONS PTY LTD
公开号:WO2014071457A1
公开(公告)日:2014-05-15
The present invention relates generally to conjugates comprising a nitric oxide donor and an acyl homoserine lactone, fimbrolide, fimbrolide derivative, dihydropyrrolone or indole, and to the use of such conjugates as antimicrobial agents.
A novel type of hydrogen peroxide (H2O2)-activated diazeniumdiolate based on an α-ketoamide moietey was developed as a nitric oxide (NO) donor. KA-NO-4 inhibited lung cancer cells with submicromolar activity. The H2O2-responsive behaviour of KA-NO-4 was thoroughly investigated. The NO-centered mechanism of action of KA-NO-4 was intracellularly studied.
开发了一种新型的基于α-酮酰胺基的过氧化氢(H 2 O 2)活化的二醇二氮烯二酸酯作为一氧化氮(NO)供体。KA-NO-4抑制具有亚微摩尔活性的肺癌细胞。彻底研究了KA-NO-4的H 2 O 2响应行为。在细胞内研究了以NO为中心的KA-NO-4的作用机理。
Hydrolytic Reactivity Trends among Potential Prodrugs of the O<sup>2</sup>-Glycosylated Diazeniumdiolate Family. Targeting Nitric Oxide to Macrophages for Antileishmanial Activity
作者:Carlos A. Valdez、Joseph E. Saavedra、Brett M. Showalter、Keith M. Davies、Thomas C. Wilde、Michael L. Citro、Joseph J. Barchi、Jeffrey R. Deschamps、Damon Parrish、Stefan El-Gayar、Ulrike Schleicher、Christian Bogdan、Larry K. Keefer
DOI:10.1021/jm8000482
日期:2008.7
Glycosylated diazeniumdiolates of structure R(2)NN(O)=NO-R' (R' = a saccharide residue) are potential prodrugs of the nitric oxide (NO)-releasing but acid-sensitive R(2)NN(O)=NO(-) ion. Moreover, cleaving the acid-stable glycosides under alkaline conditions provides a convenient protecting group strategy for diazeniumdiolate ions. Here, we report comparative hydrolysis rate data for five representative glycosylated diazeniumdiolates at pH 14, 7.4, and 3.8-4.6 as background for further developing both the protecting group application and the ability to target NO pharmacologically to macrophages harboring intracellular pathogens. Confirming the potential in the latter application, adding R(2)NN(O)=NO-GlcNAc (where R(2)N = diethylamino or pyrrolidin-1-yl and GlcNAc = N-acetylglucosamin-1-yl) to cultures of infected mouse macrophages that were deficient in inducible NO synthase caused rapid death of the intracellular protozoan parasite Leishmania major with no host cell toxicity.
Synthesis, mechanistic studies, and anti-proliferative activity of glutathione/glutathione S-transferase-activated nitric oxide prodrugs
作者:Harinath Chakrapani、Ravi C. Kalathur、Anna E. Maciag、Michael L. Citro、Xinhua Ji、Larry K. Keefer、Joseph E. Saavedra
DOI:10.1016/j.bmc.2008.09.063
日期:2008.11
Nitric oxide (NO) prodrugs such as O-2-(2,4-dinitrophenyl) 1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate (JS-K) are a growing class of promising NO-based therapeutics. Nitric oxide release from the anti-cancer lead compound, JS-K, is proposed to occur through a nucleophilic aromatic substitution by glutathione (GSH) catalyzed by glutathione S-transferase (GST) to form a diazeniumdiolate anion that spontaneously releases NO. In this study, a number of structural analogues of JS-K were synthesized and their chemical and biological properties were compared with those of JS-K. The homopiperazine analogue of JS-K showed anti-cancer activity that is comparable with that of JS-K but with a diminished reactivity towards both GSH and GSH/GST; both the aforementioned compounds displayed no cytotoxic activity towards normal renal epithelial cell line at concentrations where they significantly diminished the proliferation of a panel of renal cancer cell lines. These properties may prove advantageous in the further development of this class of nitric oxide prodrugs as cancer therapeutic agents. Published by Elsevier Ltd.