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An Ex vivo Model of an Oligodendrocyte-directed T-Cell Attack in Acute Brain Slices
Published on: February 5, 2015
Methamphetamine induces oligodendroglial cell death in vitro
Kursad Genc1, Sermin Genc, Sefa Kizildag
1Department of Physiology, Dokuz Eylul University, Inciralti, 35340, Izmir, Turkey. kkursadgenc@hotmail.com
Abstract:
We investigated whether the psychostimulant methamphetamine (METH) has a cytotoxic effect on oligodendrocytes and which cell-death pathways are involved in the cytotoxic process. METH caused concentration- and time-dependent cytotoxicity in rat oligodendrocyte cultures. METH induced apoptotic cell death and mRNA expression of pro-apoptotic proteins (bax and DP5), but not anti-apoptotic proteins (bcl-2 and bcl-XL). These results suggest that METH induces cytotoxicity in rat oligodendrocytes via the differential regulation of the expression of genes involved in the apoptotic process.
Insights
Methamphetamine (METH) is cytotoxic to rat oligodendrocytes, inducing cell death through apoptosis. This occurs via the regulation of specific pro-apoptotic genes, suggesting a pathway for METH-induced neurotoxicity.
Area of Science:
- Neuroscience
- Cell Biology
- Toxicology
Background:
- Oligodendrocytes are crucial for central nervous system myelin formation and function.
- Methamphetamine (METH) is a psychostimulant with known neurotoxic potential.
- The specific effects of METH on oligodendrocytes and the underlying cell-death mechanisms remain incompletely understood.
Purpose of the Study:
- To investigate the cytotoxic effects of methamphetamine (METH) on oligodendrocytes.
- To identify the cell-death pathways involved in METH-induced oligodendrocyte toxicity.
Main Methods:
- Primary rat oligodendrocyte cultures were exposed to varying concentrations and durations of METH.
- Cell viability assays were performed to assess cytotoxicity.
- Quantitative real-time PCR was used to measure the mRNA expression of key apoptotic and anti-apoptotic genes.
Main Results:
- Methamphetamine (METH) demonstrated concentration- and time-dependent cytotoxicity in rat oligodendrocyte cultures.
- METH exposure led to increased apoptotic cell death.
- Upregulation of pro-apoptotic gene mRNA (bax and DP5) was observed, while anti-apoptotic gene mRNA (bcl-2 and bcl-XL) remained unchanged.
Conclusions:
- Methamphetamine (METH) induces cytotoxicity in rat oligodendrocytes.
- The mechanism involves the induction of apoptotic cell death.
- Differential regulation of pro-apoptotic gene expression plays a significant role in METH-induced oligodendrocyte toxicity.
