What question did this study set out to answer?

To determine the molecular mechanism driving copper overload cytotoxicity and elucidate the specific protective function of glutathione.

January 1, 2018MetallomicsOpen Access

Copper-induced cell death and the protective role of glutathione: the implication of impaired protein folding rather than oxidative stress

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Authors

CSChristian Saporito-MagriñáUniversity of Buenos Aires RMRosario Musacco-SebioUniversity of Buenos Aires GAGeoffroy AndrieuxUniversity of Freiburg

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Implication

Experimental study demonstrates copper toxicity triggers cell death through protein misfolding rather than oxidative stress, indicating glutathione protects cells via metal chelation.

Key Points

To determine the molecular mechanism driving copper overload cytotoxicity and elucidate the specific protective function of glutathione.
Assessed intracellular redox status, thiol homeostasis, and antioxidant pathway activation during copper overload.
Analyzed the effects of intracellular cuprous ions on protein folding, protein aggregation, and the heat shock response.
Investigated the mechanism of glutathione protection against copper-induced toxicity and localized protein aggregation.
Copper overload induced cell death without initiating a consistent antioxidant response or altering thiol homeostasis until immediately before death, disproving oxidative stress as the primary lethal driver.
Cuprous ions directly bound cellular proteins to impair folding and induce aggregation, prompting cells to activate a heat shock response rather than an antioxidant response.
Glutathione conferred protection independently of its reactive thiol group by chelating cuprous ions, with localized glutathione depletion occurring near copper entry sites directly below the plasma membrane.

Cite This Study

Saporito-Magriñá et al. (2018) studied this question.

synapsesocial.com/papers/6a9ff8aebcae9b4d8eba47d7 https://doi.org/10.1039/c8mt00182k

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Implication

Experimental study demonstrates copper toxicity triggers cell death through protein misfolding rather than oxidative stress, indicating glutathione protects cells via metal chelation.

Copper-induced cell death and the protective role of glutathione: the implication of impaired protein folding rather than oxidative stress

Discussion

Member takes

Implication

Key Points

Cite This Study

Copper-induced cell death and the protective role of glutathione: the implication of impaired protein folding rather than oxidative stress

Discussion

Member takes

Implication

Key Points

Cite This Study

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