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Antiradical, Chelating and Antioxidant Activities of Hydroxamic Acids and Hydroxyureas
Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovačića 1, Zagreb HR-10000, Croatia
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Received: 19 May 2011; in revised form: 13 July 2011 / Accepted: 20 July 2011 / Published: 25 July 2011
Abstract: Reactive oxygen species, along with reactive nitrogen species, may play an important role in the pathogenesis and progress of many diseases, including cancer, diabetes and sickle cell disease. It has been postulated that hydroxyurea, one of the main treatments in sickle cell disease, achieves its activity partly also through its antioxidant properties. A series of hydroxyurea derivatives of L- and D-amino acid amides and cycloalkyl-N-aryl-hydroxamic acids was synthesized and investigated for their radical scavenging activity, chelating properties and antioxidant activity. All the compounds showed exceptional antiradical activities. For example, free radical scavenging activities of investigated hydroxyureas were higher than the activity of standard antioxidant, butylated hydroxyanisole (BHA). Moreover, most of the investigated hydroxamic acids were stronger Fe2+ ion chelators than quercetin. In addition, the investigated compounds, especially hydroxamic acids, were proven to be excellent antioxidants. They were as effective as BHA in inhibiting b-carotene-linoleic acid coupled oxidation. It is reasonable to assume that the antioxidant activity of the investigated compounds could contribute to their previously proven biological properties as cytostatic and antiviral agents.
Keywords: hydroxamic acids; hydroxyureas; free radical; oxidative stress; reactive oxygen species
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Končić, M.Z.; Barbarić, M.; Perković, I.; Zorc, B. Antiradical, Chelating and Antioxidant Activities of Hydroxamic Acids and Hydroxyureas. Molecules 2011, 16, 6232-6242.
Končić MZ, Barbarić M, Perković I, Zorc B. Antiradical, Chelating and Antioxidant Activities of Hydroxamic Acids and Hydroxyureas. Molecules. 2011; 16(8):6232-6242.
Končić, Marijana Zovko; Barbarić, Monika; Perković, Ivana; Zorc, Branka. 2011. "Antiradical, Chelating and Antioxidant Activities of Hydroxamic Acids and Hydroxyureas." Molecules 16, no. 8: 6232-6242.