Actively helping customers, employees and the global community during the coronavirus SARS-CoV-2 outbreak.  Learn more >>

Amplite® Rapid Fluorimetric Glutathione GSH/GSSG Ratio Assay Kit *Green Fluorescence*

GSH and GSSG dose responses were measured with Amplite® Rapid Fluorimetric Glutathione GSH/GSSG Ratio Assay Kit. Blue: GSH dose responses (0.078 to 5 µM); Red: GSSG dose responses (0.078 to 5 µM GSSG which is equivalent to 0.156 to 10 µM GSH).
GSH and GSSG dose responses were measured with Amplite® Rapid Fluorimetric Glutathione GSH/GSSG Ratio Assay Kit. Blue: GSH dose responses (0.078 to 5 µM); Red: GSSG dose responses (0.078 to 5 µM GSSG which is equivalent to 0.156 to 10 µM GSH).
Ordering information
Price ()
Catalog Number10060
Unit Size
Find Distributor
Additional ordering information
Telephone1-408-733-1055
Fax1-408-733-1304
Emailsales@aatbio.com
InternationalSee distributors
ShippingStandard overnight for United States, inquire for international
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
UNSPSC12171501

OverviewpdfSDSpdfProtocol


When cells are exposed to increased levels of oxidative stress, GSSG will accumulate and the ratio of GSH to GSSG will decrease. The glutathione redutase recycles GSSG to GSH with simultaneous oxidation of b-nicotinamide adenine dinuclecotide phosphate. The monitoring of GSH/GSSG ratio and the quantification of GSSG in biological samples are essential for evaluating the redox and detoxification status of cells and tissues in relation to the protective role of glutathione against oxidative and free-radical-mediated cell injury. There are a few reagents or assay kits available for the quantitation of thiols in biological systems. However, all the commercial kits either lack sensitivity or have tedious protocols. Our Amplite® Rapid Fluorimetric GSH/GSSG Ratio Kit (#10060) provides an ultrasensitive assay to quantitate GSH in the sample. The kit uses a proprietary water-soluble non-fluorescent dye that becomes strongly fluorescent upon reacting with thiol. The kit provides a sensitive, one-step fluorimetric method to detect as little as 1 picomole of cysteine or GSH in a 100 µL assay volume. The assay can be performed in a convenient 96-well or 384-well microtiter-plate format and easily adapted to automation without a separation step. Its signal can be easily read by a fluorescence microplate reader.

Platform


Fluorescence microplate reader

Excitation490 nm
Emission525 nm
Cutoff515 nm
Recommended plateSolid black

Components


Component A: Thiolite™ Green 520WS1 vial
Component B: Assay Buffer1 bottle (25 mL)
Component C: GSH Standard1 vial (62 µg)
Component D: GSSG Probe1 bottle (lyophilized powder)
Component E: GSSG Standard1 vial (124 µg)

Example protocol


AT A GLANCE

Protocol Summary
  1. Prepare GSH working solution (50 µL)
  2. Add GSH standards and/or GSSG standards or test samples (50 µL)
  3. Incubate at RT for 10 to 60 minutes
  4. Monitor the fluorescence increase at Ex/Em = 490/525 nm (Cutoff = 515 nm) 
Important      Thaw all the kit components at room temperature before starting the experiment.

PREPARATION OF STOCK SOLUTIONS

Unless otherwise noted, all unused stock solutions should be divided into single-use aliquots and stored at -20 °C after preparation. Avoid repeated freeze-thaw cycles.

1. GSH standard solution (1 mM)
Add 200 µL of Assay Buffer (Component B) into the vial of GSH Standard (Component C) to make 1 mM (1 nmol/µL) GSH standard solution.

2. GSSG standard stock solution (1 mM)
Add 200 µL of ddH2O into the vial of GSSG Standard (Component E) to make 1 mM (1 nmol/µL) GSSG standard solution.

3. Thiolite™ Green 520WS stock solution (100X)
Add 100 µL of ddH2O into the vial of Thiolite™ Green 520WS (Component A) to make 100X Thiolite™ Green 520WS stock solution.
Note     Avoid light.

PREPARATION OF STANDARD SOLUTION

For convenience, use the Serial Dilution Planner:
https://www.aatbio.com/tools/serial-dilution/10060


GSH or GSSG standard
Prepared serially diluted GSH standards (0 to 10 µM):Add 10 µL of 1 mM (1 nmol/µL) GSH standard solution to 990 µL of Assay Buffer (Component B) to generate 10 µM (10 pmol/µL) GSH standard solution (GSH7). Take 10 µM (10 pmol/µL) GSH standard solution (GSH7) and perform 1:2 serial dilutions in Assay Buffer (Component B) to get serially diluted GSH standards (GSH6 - GSH1). Note: Diluted GSH standard solution is unstable. Use within 4 hours. Prepare serially diluted GSSG standards (0 to 5 µM):Add 10 µL of 1 mM (1 nmol/µL) GSSG standard solution to 990 µL of Assay Buffer (Component B) to generate 10 µM (10 pmol/µL) GSSG standard solution. Take 10 µM (10 pmol/µL) GSSG standard solution and perform 1:2 serial dilutions in Assay Buffer (Component B) to get serially diluted GSSG standards (GSSG7 - GSSG1). Note: Diluted GSSG standard solution is unstable. Use within 4 hours.

PREPARATION OF WORKING SOLUTION

1. GSH working solution (GSH-WS)
Add 100 µL of 100X Thiolite™ Green 520WS stock solution into 10 mL of Assay Buffer (Component B) and mix well by vortexing.
Note     This GSH working solution (GSH-WS) is enough for two 96-well plates. It is stable at 4 °C for at least 4 hours when protected from light.


2. Total GSH working solution (TGSH-WS)
Add 5 mL of GSH-WS into the bottle of GSSG Probe (Component D) and mix them well.
Note     This Total GSH working solution (TGSH-WS) is enough for one 96-well plates. It is unstable at room temperature, and should be used promptly within 2 hours.
Note     Avoid exposure to light.
Note     Alternatively, one can make a 25X GSSG Probe by adding 200 µL of ddH2O into the bottle of GSSG Probe (Component D), and then prepare the TSGS-WS by mix the stock solution with GSH-WS proportionally.

SAMPLE EXPERIMENTAL PROTOCOL

Table 1.Layout of GSH standards, GSSG standards, and test samples in a solid black 96-well microplate. GSH= GSH Standards (GSH1 - GSH7, 0.15 to 10 µM), GSSG= GSSG Standards (GSSG1 - GSSG7, 0.078 to 5 µM), BL=Blank Control, TS=Test Samples.
Panel A Pannel B
BL BL TS TS BL BL TS TS
GSH1 GSH1 ... ... GSSG1 GSSG1 ... ...
GSH2 GSH2 ... ... GSSG2 GSSG2 ... ...
GSH3 GSH3     GSSG3 GSSG3    
GSH4 GSH4     GSSG4 GSSG4    
GSH5 GSH5     GSSG5 GSSG5    
GSH6 GSH6     GSSG6 GSSG6    
GSH7 GSH7     GSSG7 GSSG7    
Table 2.Reagent composition for wells.
Note     Add test samples into wells in both Panel A and Panel B.

WellVolumeReagent
GSH1 - GSH7 50 µLSerial Dilutions (0.15 to 10 µM)
GSSG1-GSSG750 µLSerial Dilutions (0.078 to 5 µM)
BL50 µLAssay Buffer
TS50 µLtest sample
  1. Prepare GSH standards (GSH), blank controls (BL), and test samples (TS) according to the layout provided in Tables 1 and 2. For a 384-well plate, use 25 µL of reagent per well instead of 50 µL. When just GSH assay is needed, fill ONLY the wells in two left columns (Panel A) according to Table 1. When Total GSH assay is needed, fill the wells in both Panel A (left) and Panel B (right) according to Table 1.
    Note     Treat cells or tissue samples as desired.
  2. Add 50 µL of GSH working solution (GSH-WS) into each well of GSH standards, blank controls, and test samples to make the total GSH assay volume of 100 µL/well. For a 384-well plate, add 25 µL of GSH-WS into each well instead, for a total volume of 50 µL/well.
  3. If total GSH (in reduced and oxidized states) assay is needed, prepare Total GSH working solution (TGSH-WS) and GSSG standards. Add GSSG standards (GSSG), blank controls (BL), and test samples (TS) according to the layout provided in Tables 1 and 2. For a 384-well plate, use 25 µL of reagent per well instead of 50 µL. Then add 50 µL of TGSH-WS to each well of GSSG standards, blank controls, and test samples to amke the total assay volume 100 µL/well. For a 384-well plate, add 25 µL of TGSH-WS into each well instead, for a total volume of 50 µL/well.
  4. Incubate the reaction at room temperature for 10 to 60 minutes, protected from light.
  5. Monitor the fluorescence increase with a fluorescence plate reader at Ex/Em = 490/525 nm (Cutoff = 515 nm). 

Citations


View all 10 citations: Citation Explorer
An arylthiazyne derivative is a potent inhibitor of lipid peroxidation and ferroptosis providing neuroprotection in vitro and in vivo
Authors: Keuters, Meike Hedwig and Keksa-Goldsteine, Velta and Dhungana, Hiramani and Huuskonen, Mikko T and Pomeshchik, Yuriy and Savchenko, Ekaterina and Korhonen, Paula K and Singh, Yajuvinder and Wojciechowski, Sara and Lehtonen, {\v{S}}{\'a}rka and others,
Journal: Scientific reports (2021): 1--14
Notoginsenoside R1 attenuates high glucose-induced endothelial damage in rat retinal capillary endothelial cells by modulating the intracellular redox state
Authors: Fan, Chunlan and Qiao, Yuan and Tang, Minke
Journal: Drug design, development and therapy (2017): 3343
ROS production and glutathione response in keratinocytes after application of β-carotene and VIS/NIR irradiation
Authors: Lohan, Silke B and Vitt, Kristina and Scholz, Patrik and Keck, Cornelia M and Meinke, Martina C
Journal: Chemico-biological interactions (2017)
Osmotic stress is accompanied by protein glycation in Arabidopsis thaliana
Authors: Paudel, Gagan and Bilova, Tatiana and Schmidt, Rico and Greifenhagen, Uta and Berger, Robert and Tarakhovskaya, Elena and Stöckhardt, Stefanie and Balcke, Gerd Ulrich and Humbeck, Klaus and Br, undefined and t, Wolfgang and others, undefined
Journal: Journal of Experimental Botany (2016): 6283--6295
Interaction of silver nanoparticles with human and porcine skin
Authors: Ahlberg, Sebastian
Journal: (2016)
Systemic Induction of NO-, Redox-, and cGMP Signaling in the Pumpkin Extrafascicular Phloem upon Local Leaf Wounding
Authors: Gaupels, Frank and Furch, Alex and ra CU , undefined and Zimmermann, Matthias R and Chen, Faxing and Kaever, Volkhard and Buhtz, Anja and Kehr, Julia and Sarioglu, Hakan and Kogel, Karl-Heinz and Durner, Jörg
Journal: Frontiers in plant science (2016)
Targeting mitochondria with avocatin B induces selective leukemia cell death
Authors: Lee, Eric A and Angka, Leonard and Rota, Sarah-Grace and Hanlon, Thomas and Mitchell, Andrew and Hurren, Rose and Wang, Xiao Ming and Gronda, Marcela and Boyaci, Ezel and Bojko, Barbara and others,
Journal: Cancer research (2015): 2478--2488
Prediction of intracellular metabolic states from extracellular metabolomic data
Authors: Aurich, Maike K and Paglia, Giuseppe and Rolfsson, Ottar and Hrafnsdóttir, Sigrún and Magnúsdóttir, Manuela and Stefaniak, Magdalena M and Palsson, Bernhard O and Fleming, Ronan MT and Thiele, Ines
Journal: Metabolomics (2015): 603--619
Molecular mechanisms of hyperthermia-induced apoptosis enhanced by withaferin A
Authors: Cui, Zheng-Guo and Piao, Jin-Lan and Rehman, Mati UR and Ogawa, Ryohei and Li, Peng and Zhao, Qing-Li and Kondo, Takashi and Inadera, Hidekuni
Journal: European journal of pharmacology (2014): 99--107
Cancer & Metabolism
Authors: LaMonte, Gregory and Tang, Xiaohu and Chen, Julia Ling-Yu and Wu, Jianli and Ding, Chien-Kuang Cornelia and Keenan, Melissa M and Sangokoya, Carolyn and Kung, Hsiu-Ni and Ilkayeva, Olga and Boros, László G and others, undefined
Journal: (2013)