What question did this study set out to answer?

The aim is to understand how persistent PI3K–AKT signaling protects cancer cells from oxidative stress and ferroptosis.

Persistent PI3K–AKT signaling fortifies cellular defense against oxidative stress and ferroptosis through augmented mitochondrial fitness

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This research investigates the role of PI3K–AKT signaling in enhancing mitochondrial fitness and resisting ferroptosis in cancer cells.

The aim is to understand how persistent PI3K–AKT signaling protects cancer cells from oxidative stress and ferroptosis.
Compared sensitivity of MCF-7 and MDA-MB-231 cells to oxidative stress and ferroptosis inducers.
Conducted RNA-sequencing to assess transcriptomic changes after PI3K inhibition.
Measured mitochondrial mass, membrane potential, ATP production, and glutathione levels.
Utilized pharmacological inhibitors and AKT activators for functional validation.
Ectopically expressed oncogenic PIK3CA-E542K in HeLa cells.
Cancer cells with active PI3K exhibited high resistance to oxidative stress and ferroptosis.
PI3K–AKT signaling enhanced mitochondrial fitness and antioxidant capacity.
Inhibition of the PI3K–AKT–mTOR pathway increased reactive oxygen species levels and sensitized cells to ferroptosis.
Ectopic expression of oncogenic PIK3CA or AKT activation conferred oxidative stress resistance.

Xie et al. (2026) studied this question.

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