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Mitochondrial Dynamics Impairment in Dexamethasone-Treated Neuronal Cells
Wilasinee Suwanjang1, Kay L H Wu2, Supaluk Prachayasittikul3
1Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, 10700, Bangkok, Thailand. wilasinee.suw@mahidol.ac.th.
Neurochemical Research
|March 20, 2019
Summary
High doses of dexamethasone impair mitochondrial dynamics, leading to neurotoxicity. This steroid-induced neuronal damage involves increased mitochondrial fusion and caspase-dependent cell death.
Area of Science:
- Neuroscience
- Cell Biology
- Pharmacology
Background:
- Dexamethasone is a steroid used clinically to modulate immune responses.
- It can cross the blood-brain barrier and affect neuronal function.
- High dexamethasone levels may cause neuronal cell loss and dysfunction, but mechanisms are unclear.
Purpose of the Study:
- To investigate the role of mitochondrial dynamics in dexamethasone-induced neurotoxicity.
- To explore the effects of dexamethasone on human neuroblastoma SH-SY5Y cells.
Main Methods:
- Treatment of human neuroblastoma SH-SY5Y cells with dexamethasone.
- Assessment of cell proliferation.
- Analysis of mitochondrial fusion proteins and cleaved caspase-3 expression.
Main Results:
- Dexamethasone significantly decreased cell proliferation.
- Upregulation of mitochondrial fusion and cleaved caspase-3 proteins was observed.
- Hyperfused mitochondrial structures were prevalent in treated cells.
Conclusions:
- Dexamethasone-induced neurotoxicity is linked to impaired mitochondrial dynamics.
- Hyperfusion of mitochondria and caspase activation contribute to cell death.
- High dexamethasone doses exhibit neurotoxic effects via mitochondrial pathways.
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