Product DescriptionGlutathione (γ-L-glutamyl-L-cysteinylglycine) is a tripeptide present in the body, and it is involved in antioxidation, drug metabolism, and other as enzyme substrate of glutathione peroxidase, glutathione S-transferase, and thiol transferase, etc. Glutathione is usually present as reduced form (GSH), but GSH is converted into its oxidized form (GSSG) by stimulation such as oxidative stress. Therefore, the ratio of GSH and GSSG has been noted as index of oxidative stress.The GSSG/GSH Quantification kit contains Masking Reagent of GSH. The GSH can be deactivated in the sample by simply adding the Masking Reagent. Therefore, temp-only the GSSG is detected by measuring the absorption (λmax = 412 nm) of DTNB (5,5 Edithiobis (2-nitrobenzoic acid) using the enzymatic recycling system. Also, GSH can be determined the quantity by subtracting GSSG from the total amount of glutathione.The kit is limited to quantifying GSH/GSSG concentration from 0.5 μmol/l to 50 μmol/l and GSSG concentration from 0.5 μmol/l to 25 μmol/l.

Principle

Selective QuantificationAlthough conventional masking reagent, 2-Vinylpyridine(2-VP), interferes the reaction of GSSG measurement, Dojindo’s masking reagent does not interfere the reaction of GSSG measurement. Therefore, the exact ratio of GSSG and GSH is obtained with Dojindo GSSG/GSH detection Kit.

Measurement of GSSG with or without GSH masking reagent

InterferenceReducing agents such as ascorbic acid, β-mercaptoethanol, dithiothreitol (DTT) and cysteine, or thiol reactive compounds such as maleimide compounds, interfere with the glutathione assay. Therefore, SH compounds, reducing agents and SH reactive materials should be avoided during the sample preparation.

Required Equipment and Materials– Plate reader (405 or 415 nm filter)– 96-well microplate– Incubator (37ºC)– 20 µl and 200 µl pipettes, a multi channel pipette– 5-Sulfosalicylic Acid (SSA) Solution– Ethanol

Assay Procedure

Literature used “GSSG/GSH Quantification Kit”

Diurnal Variation of cadmium-induced mortality in miceN. Miura, Y. Yanagiba, K. Ohtani, M. Mita, M. Togawa, and T. Hasegawa, J. Toxicol. Sci., 2012, 37(1), 191<Detailed information on this article>– Measuring object: Hepatic GSH– Sample: Liver (Mice)– Preparation of sample1) Homogenize liver sample in 5% SSA for 30 seconds in ice-water bath.2) Centrifuge the homogenates consisting of 100 mg liver in 1 ml (10%) at 8,000 x g for 10 min. at 4°C to remove proteins.3) Assay with supernatants for GSH using GSSG/GSH Quantification Kit according to the manufacture’s instruction.

Effect of Oxidative Stress on Secretory Function in Salivary Gland CellsK. Okabayashi, T. Narita, Y. Takahashi, H. Sugiya, (2012), Oxidative Stress – Environmental Induction and Dietary Antioxidants, Edited by Volodymyr I. Lushchak, ISBN 978-953-51-0553-4, Hard cover, 388 pages, Publisher: InTech<Detailed information on this article>– Measuring object: GSH– Sample: Parotid acinar cells– Preparation of sample1) Collect parotid acinar cells by centrifugation at 10,000 g for 15 s and immediately mixed with 160 ul of 10 mM HCl.2) Freeze and thraw the mixture three times over, then mix with 40 ul of 5% SSA and then centrifuge at 8,000 g for 10 minutes.3) Collect the supernatant and dilute twice.

Chloroplast DNA Replication Is Regulated by the Redox State Independently of Chloroplast Division in Chlamydomonas reinhardtii Y. Kabeya, and S. Miyagishima, Plant Physiol., 2013, 161, 2102<Detailed information on this article>– Measuring object: GSH and GSSG– Sample: Chlamydomonas reinhardtii– Preparation of sample1) Collect Chlamydomonas reinhardtii cells by 1,000g for 5 min and wash with PBS.2) Resuspended in 5% SSA solution and disrupted by sonication.3) Collect the supernatants by 15,000g for 5 min.4) Isolate chloroplst by 700g for 5 min and wash with 50 mM HEPES-KOH, pH 7.5, containing 300mM sorbitol.5) Resuspend in 5% SSA solution and centrifuge at 15,000g for 5 min

Selected publicationsER Stress Cooperates with Hypernutrition toTrigger TNF-Depe. Cancer Cell. 2014;26:331-343.Purpose: Determine indicator of ER Stress in Liver

Mechanisms of cadmium-inducedchronotoxicity in mice. The journal of toxicological. 2013;38:947-957.Purpose: Determine the GSH/GSSG ratio in cadmium exposed Liver

Hepatitis C Virus Core Protein SuppressesMitophagy by Interacting with Parkin in the Context of MitochondrialDepolarization. The American Journal of Pathology. 2014;184:3026-3039.Purpose: Measure mitochondrial oxidative status in liver

Possible involvement of glutathione balance disruption in dihydropyrazine-induced cytotoxicity on human hepatoma HepG2 cells.The journal of toxicological.2012;37:1065-1069.Purpose: Investigate fluctuation of GSH/GSSG ratio in the cytotoxicity HepG2 Cells

Induction of heme oxygenase-1 contributes to survival of Mycobacterium abscessus in humanmacrophages-likeTHP-1cells.Redox Biology. 2015;4:328-339.Purpose: Determine redox state in macrophages

Age-related changes in salivary biomarkers.Journal of Dental Sciences. 2014;9:85-90.Purpose: Measure GSH/GSSG ratio in salivary

Protective effects of hydrogen sulfideanions against acetaminophen-induced hepatotoxicity in mice. The journal oftoxicological. 2015;40:837-841.Purpose: Measure glutathione of Hepatocyte

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