Abstract
Antioxidant assays are typically based on non-physiologically relevant reagents. We describe here a quantitative assay based on the inhibition of the liposome autooxidation in the presence of myoglobin (ILA-Mb), an oxidative process with direct biomedical relevance. Additional advantages of the assay include the use of standard and readily available reagents (lecithin and myoglobin) and the applicability to lipophilic antioxidants. The ILA-Mb assay is based on previously reported qualitative or semi-quantitative ones that employed cytochrome c instead of myoglobin. A number of antioxidants are tested, and their IC50 parameters are discussed and interpreted to involve direct interaction with both myoglobin and the liposomes.
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