Abstract
DMEM/F12 nutrient mixture, a recommended media for ARPE-19 culture, contains glucose concentration of 17.5 mM. But, several recent studies employed normal glucose media (5.5 mM) that was shown to affect the growth and function of ARPE-19 cells. Here, we set a protocol to study the effect of hyperglycemia on intracellular oxidative stress and redox status in ARPE-19 using DMEM/F12 as control. The WST-1 assay was performed to analyze the viability of ARPE-19 upon glucose treatment. The intracellular oxidative stress was measured by a dichlorofluorescein assay. The mitochondrial membrane potential (MMP) was monitored by using a JC-10 MMP assay kit. The expression of antioxidant marker proteins was analyzed by western blotting. Exogenous addition of glucose (7.5 and 12.5 mM) for 24 and 48 h did not change the viability and morphology of ARPE-19 cells. Hyperglycemia increased intracellular ROS level and decreased MMP in a dose-dependent manner. High-glucose treatment for 24 h down-regulated the protein expression of redox-specific transcription factors Nrf-2, XBP-1 and NF-κB, and subsequently decreased the expression of HO-1, catalase, and SOD-2. This study offers baseline information for the subsequent use of DMEM/F12 nutrient mixture to study glucose-mediated changes in intracellular oxidative stress and redox status of ARPE-19 without affecting its basic functions.
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Abbreviations
- ARE:
-
Antioxidant response element
- ARPE-19:
-
Adult retinal pigment epithelial cell line-19
- ATCC:
-
American type culture collection
- CCCP:
-
Carbonyl cyanide m-chlorophenyl hydrazine
- CRALBP:
-
Cellular retinaldehyde-binding protein
- DCF:
-
Dichlorofluorescein
- DCFH-DA:
-
2′,7′-Dichlorofluorescein diacetate
- DMEM/F12:
-
Dulbecco’s modified eagle medium nutrient mixture F-12
- ER:
-
Endoplasmic reticulum
- FBS:
-
Fetal bovine serum
- HEPES:
-
4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid
- HO-1:
-
Heme oxygenase 1
- H2O2 :
-
Hydrogen peroxide
- MMP:
-
Mitochondrial membrane potential
- NFκB:
-
Nuclear factor kappa B
- Nrf2:
-
Nuclear factor erythroid-2 related factor 2
- POS:
-
Photoreceptor outer segment
- ROS:
-
Reactive oxygen species
- RPE:
-
Retinal pigmental epithelium
- RPE-65:
-
Retinal pigment epithelium-specific 65 kDa protein
- SOD-2/MnSOD:
-
Superoxide dismutase 2/manganese-dependent superoxide dismutase
- WST-1:
-
Water-soluble tetrazolium salt-1
- XBP-1:
-
X-box binding protein
- ZO-1:
-
Zonula occludens-1
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Acknowledgements
The author, Arpitha H S acknowledges the University Grants Commission (UGC), New Delhi, India for granting Research Fellowship. The authors thank the Academy of Scientific & Innovative Research (AcSIR) and the Director, CSIR-CFTRI for the constant support to carry out this work.
Funding
This study was funded by the 12th Five Year Plan Project (BSC-0404) of CSIR, New Delhi.
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Haranahalli Shivarudrappa, A., Gopal, S.S. & Ponesakki, G. An in vitro protocol to study the effect of hyperglycemia on intracellular redox signaling in human retinal pigment epithelial (ARPE-19) cells. Mol Biol Rep 46, 1263–1274 (2019). https://doi.org/10.1007/s11033-019-04597-x
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DOI: https://doi.org/10.1007/s11033-019-04597-x