کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7692984 | 1496323 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ranking antioxidants based on their effect on human serum lipids peroxidation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Evaluation of the activity of antioxidants is commonly based on measurements of the effect of a specific antioxidant on redox reactions conducted in a solution. Given the difference between reactions that occur in homogeneous solutions and those that occur at lipid-water interfaces, as in biological membranes and lipoproteins, the relevance of the commonly-used assays (such as TEAC and ORAC) to the antioxidative activity in biological systems is questionable. The aim of the present investigation is to develop a more relevant assay. Based on our results, we propose an assay based on prolongation of the lag preceding fast peroxidation of serum lipids. The assay employs our previously developed procedure for determination of susceptibility of serum lipids to peroxidation. The effect of antioxidants is expressed in terms of the relative prolongation of the lag preceding peroxidation. It can be considered reliable because it is only marginally dependent on the specific sera used for the assay. The resultant ranking of antioxidants may be expressed either as the relative prolongation of the lag per 1 μM of antioxidant or as the concentration of antioxidant required to double the lag. As expected, the observed ranking order is very different from that reported for TEAC or ORAC assays, undermining the relevance of these assays for oxidation that occurs at interfaces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemistry and Physics of Lipids - Volume 164, Issue 1, January 2011, Pages 42-48
Journal: Chemistry and Physics of Lipids - Volume 164, Issue 1, January 2011, Pages 42-48
نویسندگان
Ilya Pinchuk, Hila Shoval, Ariela Bor, Edit Schnitzer, Yedidya Dotan, Dov Lichtenberg,