Abstract
Advanced glycation endproducts (AGEs) arise from the reaction of sugars with side chains and the N-terminus of proteins and are thought to be involved in the pathogenesis of several diseases by inducing oxidative stress, inflammation and cell death presumably mediated through activation of the receptor of AGE (RAGE). To address the question whether the cell damaging effect of AGE depends on the degree of its protein glycation, differential modified AGEs derived from incubating human serum albumin with increasing concentrations of methyl glyoxal were tested on cell viability, reactive oxygen species (ROS) formation, intracellular ATP levels, and activation of caspases 3/7 in two human glial cell lines, which were used as a model for human glia cells. All AGEs tested, regardless of their degree of modification, were found to induce ROS formation in both microglial (CHME-5) and astroglial cells (U373 MG), while only highly modified AGEs were able to decrease the cell viability and to induce apoptosis. This indicates that apoptotic events may be involved in the change of physiological parameters.
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Abbreviations
- A:
-
Absorbance
- AD:
-
Alzheimer’s disease
- AGEs:
-
Advanced glycation endproducts
- BCA:
-
Bicinchoninic acid
- BSA:
-
Bovine serum albumin
- CTB:
-
CellTiter Blue
- DMEM:
-
Dulbecco’s modified Eagle’s medium
- FCS:
-
Fetal calf serum
- HBSS:
-
Hank’s balanced salt solution
- HSA:
-
Human serum albumin
- H2DCF-DA:
-
Dichlorodihydrofluorescein diacetate
- MG:
-
Methyl glyoxal
- PB:
-
Phosphate buffer
- PBS:
-
Phosphate buffered saline
- RAGE:
-
Receptor for AGEs
- ROS:
-
Reactive oxygen species
- RT:
-
Room temperature
- TFA:
-
Trifluoracetoacid
- w:
-
Weeks
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Acknowledgments
This work was supported by the Interdisciplinary Centre of Clinical Research (IZKF) at the Faculty of Medicine of the University of Leipzig (01KS9504, Project N1), the Alzheimer Forschungs Initiative e.V. (Project 01805), the Deutsche Forschungsgemeinschaft (DFG) (Project MU 1011/14-1) and the Studienstiftung des deutschen Volkes (to KB). We thank Prof. Dr. Thomas Henle und Dr. Bernd Weigele, TU Dresden, Germany for providing the IgG antiRAGE antibody, Dr. Carol Lovelidge for revising the manuscript, and special thanks go to Dr. Jovana Gasic-Milenkovic for all the help that she gave us in all AGE related questions as long as we had the pleasure of working together.
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Bigl, K., Gaunitz, F., Schmitt, A. et al. Cytotoxicity of advanced glycation endproducts in human micro- and astroglial cell lines depends on the degree of protein glycation. J Neural Transm 115, 1545–1556 (2008). https://doi.org/10.1007/s00702-008-0126-4
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DOI: https://doi.org/10.1007/s00702-008-0126-4