Abstract
Ionizing radiation induces various pathophysiological conditions by altering central nervous system (CNS) homeostasis, leading to neurodegenerative diseases. However, the potential effect of ionizing radiation response on cellular physiology in glial cells is unclear. In the present study, micronucleus test, comet assay, and RT-PCR were performed to investigate the potential effect of gamma radiation in cultured oligodendrocytes and astrocytes with respect to genomic instability, Endoplasmic Reticulum (ER) stress, and inflammation. Further, we studied the effect of alteration in ER stress specific gene expression in cortex post whole body radiation in mice. Results showed that exposure of gamma radiation of 2Gy in-vitro cultured astrocytes and oligodendrocytes and 7Gy in-vivo induced ER stress and Inflammation along with profuse DNA damage and Chromosomal abnormality. Additionally, we observed downregulation of myelin basic protein levels in cultured oligodendrocytes exposed to radiation. The present data suggests that ER stress and pro inflammatory cytokines serve as the major players in inducing glial cell dysfunction post gamma irradiation along with induction of genomic instability. Taken together, these results indicate that ER stress, DNA damage, and inflammatory pathways may be critical events leading to glial cell dysfunction and subsequent cell death following exposure to ionizing radiation.
Abbreviations
- Bcl 2:
-
B-cell lymphoma 2
- BIP:
-
Binding immunoglobulin protein
- CASP:
-
Comet assay software project
- CCK:
-
Cell Counting Kit
- DAPI:
-
4′,6-diamidino-2-phenylindole
- DMEM:
-
Dulbecco′s modified eagle′s medium
- DMSO:
-
Dimethyl sulfoxide
- DNA:
-
Deoxyribonucleic acid
- FBS:
-
Fetal bovine serum
- FITC:
-
Fluorescein isothiocyanate
- Gadd153:
-
DNA damage-inducible gene 153
- GFAP:
-
Glial fibrillary acidic protein
- Gy:
-
Gray
- MMW:
-
Millimeter wave
- PGE 2:
-
Prostaglandin E2
- RT-PCR:
-
Reverse transcription polymerase chain reaction
- TRITC:
-
Tetramethylrhodamine
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Chatterjee, J., Nairy, R.K., Langhnoja, J. et al. ER stress and genomic instability induced by gamma radiation in mice primary cultured glial cells. Metab Brain Dis 33, 855–868 (2018). https://doi.org/10.1007/s11011-018-0183-9
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DOI: https://doi.org/10.1007/s11011-018-0183-9