title: A novel anti-oxidant and anti-cancer strategy: a peptoid anti-inflammatory drug conjugate with SOD mimic activity.
abstract: Activation of reactive oxygen and nitrogen species (RONS) by redox-active metal ions has been proposed to contribute to oxidative damage in inflamed tissues. Here, we report a dual-function anti-oxidant conjugate comprising an anti-inflammatory agent (5-aminosalicylic acid) and a chelator with potential as a superoxide dismutase mimic. The conjugate ethylenediaminetetraacetic acid bis-(5-aminosalicylic acid methyl ester) [EBAME] chelates Cu(II) ions in a 1:1 ratio, as assessed spectrophotometrically using Job's method. Superoxide dismutase (SOD) activity was determined for the Mn(II)-conjugate as 0.758+/-0.130 U at a concentration of 0.99 microM. In inflamed tissues, peptidase mediated release of active 5-ASA would also release the EDTA chelator which has significant SOD mimic activity when complexed to Cu(II) ions. Thus, EBAME has potential as a dual-function anti-inflammatory agent with reduced gastric irritability.
authors.affiliation: School of Pharmacy and Biomolecular Sciences, University of Brighton, Cockcroft Building, Moulsecoomb, Brighton BN2 4GJ, UK.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Bailey
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Ingram
authors.forename: Declan P
authors.initials: DP
authors.lastname: Naughton
mesh_terms: D000636:Aminosalicylic Acids / Q000737:chemistry / Q000494:pharmacology; D000893:Anti-Inflammatory Agents / Q000737:chemistry* / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology; D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology*; D040761:Biomimetic Materials / Q000737:chemistry / Q000494:pharmacology; D002614:Chelating Agents / Q000737:chemistry / Q000494:pharmacology; D003300:Copper / Q000737:chemistry / Q000494:pharmacology; D018716:Molecular Mimicry; D034444:Peptoids / Q000737:chemistry* / Q000494:pharmacology*; D013482:Superoxide Dismutase / Q000737:chemistry*; D013481:Superoxides / Q000037:antagonists & inhibitors
chemical_list: D000636:Aminosalicylic Acids; D000893:Anti-Inflammatory Agents; D000970:Antineoplastic Agents; D000975:Antioxidants; D002614:Chelating Agents; D034444:Peptoids; D013481:Superoxides; D003300:Copper; D013482:Superoxide Dismutase