A Quantitative Method to Measure Low Levels of ROS in Nonphagocytic Cells by Using a Chemiluminescent Imaging System
Joint Authors
Kim, Jun-Sub
Jeong, Kyuho
Murphy, James M.
Rodriguez, Yelitza A. R.
Lim, Ssang-Taek Steve
Source
Oxidative Medicine and Cellular Longevity
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-06-11
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Chemiluminescence (CL) is one of the most useful methods for detecting reactive oxygen species (ROS).
Although fluorescence dyes or genetically encoded biosensors have been developed, CL is still used due to its high sensitivity, ease of use, and low cost.
While initially established and used to measure high levels of ROS in phagocytic cells, CL assays are not ideal for measuring low levels of ROS.
Here, we developed a newly modified CL assay using a chemiluminescent imaging system for measuring low concentrations of ROS in nonphagocytic cells.
We found that dissolving luminol in NaOH, rather than DMSO, increased the H2O2-induced CL signal and that the addition of 4-iodophenylboronic acid (4IPBA) further increased CL intensity.
Our new system also increased the rate and intensity of the CL signal in phorbol 12-myristate 13-acetate- (PMA-) treated HT-29 colon cancer cells compared to those in luminol only.
We were able to quantify ROS levels from both cells and media in parallel using an H2O2 standard.
A significant benefit to our system is that we can easily measure stimulus-induced ROS formation in a real-time manner and also investigate intracellular signaling pathways from a single sample simultaneously.
We found that PMA induced tyrosine phosphorylation of protein tyrosine kinases (PTKs), such as focal adhesion kinase (FAK), protein tyrosine kinase 2 (Pyk2), and Src, and increased actin stress fiber formation in a ROS-dependent manner.
Interestingly, treatment with either N-acetyl-L-cysteine (NAC) or diphenyleneiodonium (DPI) reduced the PMA-stimulated phosphorylation of these PTKs, implicating a potential role in cellular ROS signaling.
Thus, our newly optimized CL assay using 4IPBA and a chemiluminescent imaging method provides a simple, real-time, and low-cost method for the quantification of low levels of ROS.
American Psychological Association (APA)
Kim, Jun-Sub& Jeong, Kyuho& Murphy, James M.& Rodriguez, Yelitza A. R.& Lim, Ssang-Taek Steve. 2019. A Quantitative Method to Measure Low Levels of ROS in Nonphagocytic Cells by Using a Chemiluminescent Imaging System. Oxidative Medicine and Cellular Longevity،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1202358
Modern Language Association (MLA)
Kim, Jun-Sub…[et al.]. A Quantitative Method to Measure Low Levels of ROS in Nonphagocytic Cells by Using a Chemiluminescent Imaging System. Oxidative Medicine and Cellular Longevity No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1202358
American Medical Association (AMA)
Kim, Jun-Sub& Jeong, Kyuho& Murphy, James M.& Rodriguez, Yelitza A. R.& Lim, Ssang-Taek Steve. A Quantitative Method to Measure Low Levels of ROS in Nonphagocytic Cells by Using a Chemiluminescent Imaging System. Oxidative Medicine and Cellular Longevity. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1202358
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1202358