期刊
FREE RADICAL RESEARCH
卷 49, 期 6, 页码 750-767出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/10715762.2015.1018247
关键词
selenium; selenoethers; selenols; diselenides; selenocysteine; selenomethionine; sulphur; thiols; thioethers; peroxidase; oxidant; hypochlorous acid; peroxynitrous acid; radical; hydrogen peroxide; hypothiocyanous acid
资金
- Australian Research Council under the ARC Centres of Excellence [CE0561607]
- Discovery Programs [DP0988311]
- Novo Nordisk Foundation
- National Heart Foundation of Australia [G09S4313, G08S3769]
- Novo Nordisk Fonden [NNF13OC0004294] Funding Source: researchfish
Selenium is an essential trace element in mammals, with the majority specifically encoded as seleno-L-cysteine into a range of selenoproteins. Many of these proteins play a key role in modulating oxidative stress, via either direct detoxification of biological oxidants, or repair of oxidised residues. Both selenium-and sulphur-containing residues react readily with the wide range of oxidants (including hydrogen peroxide, radicals, singlet oxygen and hypochlorous, hypobromous, hypothiocyanous and peroxynitrous acids) that are produced during inflammation and have been implicated in the development of a range of inflammatory diseases. Whilst selenium has similar properties to sulphur, it typically exhibits greater reactivity with most oxidants, and there are considerable differences in the subsequent reactivity and ease of repair of the oxidised species that are formed. This review discusses the chemistry of low-molecular-mass organoselenium compounds (e.g. selenoethers, diselenides and selenols) with inflammatory oxidants, with a particular focus on the reaction kinetics and product studies, with the differences in reactivity between selenium and sulphur analogues described in the selected examples. These data provide insight into the therapeutic potential of low-molecular-mass selenium-containing compounds to modulate the activity of both radical and molecular oxidants and provide protection against inflammation-induced damage. Progress in their therapeutic development (including modulation of potential selenium toxicity by strategic design) is demonstrated by a brief summary of some recent studies where novel organoselenium compounds have been used as wound healing or radioprotection agents and in the prevention of cardiovascular disease.
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