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Table 3 List of oxidative stress biomarkers and their methods of detection

From: Oxidative stress and its biomarkers in systemic lupus erythematosus

Free radicals and reactive species

Markers/probes and detection methods

ROS/RNS

Direct measurement

ROS

1. Electron spin resonance (ERS) – Spectroscopy method

2. Fluorescence (2′,7′ dichlorofluorescein) - Flow cytometry/spectroflurometry

RNS

1. Ion electrode method

Indirect measurement

Lipid

1. Malondialdehyde (MDA) – colorometric, flurometric, ELISA, HPLC

2. Thiobarbituric acid reactive substances (TBARS) - colorimetric, flurometric

3. 4-Hydroxynonenal (4-HNE) – GC- MS, HPLC

4. F2 isoprostanes (8-iso-PGF2) – colorimetric, flurometric, ELISA

5. Lipid hydroperoxidation - Hexanoyl - Lys adduct (HEL) - ELISA, HPLC

6. Oxidized low density Lipoprotein – HPLC, ELISA

Protein

1. Carbonyl – colorometric, ELISA

2. 3-nitrotyrosine - GC-MS, HPLC, ELISA

3. Protein Thiol - colorimetric, ELISA

DNA

1. 8-Hydroxy-2′deoxyguanosine (8-OHdG) - HPLC, LC, MC, ELISA

2. DNA Break - comet assay, flow cytometry

Antioxidant

Antioxidant enzyme activity

Super oxide dismutase, Glutathione Peroxidase, Catalase, Glutathione reductase, Xanthine oxidase- ELISA, colorimetric method

Glutathione - HPLC, colorimetric/flurometric method

Antioxidant non-enzymes

Ascorbic acid, α tocopherol, β carotene, Lycopene – colorimetric Zinc, Selenium, Mn, Cu, Fe – Flame Photometrry

Antioxidant capacity

1. Total Antioxidant Status (TAS) – colorimetric method

2. Triolox Equivalent antioxidant Capacity (TEAC) – colorimetric method

3. Ferric Reducing Antioxidant Power (FRAP) – colorimetric method

4. Asymmetric Dimethylarginie (ADMA) – colorimetric method