What question did this study set out to answer?

To investigate the cellular mechanisms by which cyanide-induced histotoxic hypoxia causes neuronal cell death using differentiated and undifferentiated PC12 models.

September 1, 1996Journal of Neurochemistry

Cyanide‐Induced Apoptosis and Oxidative Stress in Differentiated PC12 Cells

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To investigate the cellular mechanisms by which cyanide-induced histotoxic hypoxia causes neuronal cell death using differentiated and undifferentiated PC12 models.
Exposed differentiated and undifferentiated PC12 cell cultures to 0.1 mM potassium cyanide (KCN) for 24 hours.
Quantified cytotoxicity using trypan blue dye exclusion and lactate dehydrogenase (LDH) release assays.
Characterized apoptotic features and oxidative mechanisms using DNA gel electrophoresis, transmission electron microscopy, endonuclease/transcription inhibitors, and 2',7'-dichlorofluorescin microfluorescence with antioxidants.
Exposure to 0.1 mM KCN for 24 hours increased cell death by 43% in differentiated PC12 cells compared to controls, but caused no cell death in undifferentiated PC12 cells.
Cyanide induced oligonucleosomal DNA fragmentation and classic apoptotic morphology, including membrane blebbing, chromatin condensation, and nuclear margination.
KCN triggered rapid intracellular oxidant generation that was blocked by approximately 50% with ascorbate or catalase, both of which partially attenuated cell viability loss and DNA strand breaks.

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Implication

In vitro study demonstrates cyanide triggers oxidative stress and apoptotic death in differentiated PC12 cells, suggesting antioxidant therapies may mitigate cyanide neurotoxicity.

Cite This Study

Mills et al. (1996) studied this question.

synapsesocial.com/papers/6a7c1ea5c2a640f0bcdf95ba https://doi.org/10.1046/j.1471-4159.1996.67031039.x

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Implication

In vitro study demonstrates cyanide triggers oxidative stress and apoptotic death in differentiated PC12 cells, suggesting antioxidant therapies may mitigate cyanide neurotoxicity.

Cyanide‐Induced Apoptosis and Oxidative Stress in Differentiated PC12 Cells

Key Points

Discussion

Implication

Cite This Study

Cyanide‐Induced Apoptosis and Oxidative Stress in Differentiated PC12 Cells

Key Points

Discussion

Implication

Cite This Study

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