eLife assessment
The large-conductance Ca2+ activated K+ channel has been reported to promote breast cancer progression. The present study presents convincing evidence that an intracellular subpopulation of this channel reprograms breast cancer cells towards the Warburg phenotype, one of the metabolic hallmarks of cancer. This important finding advances the field of cancer cell metabolism and has potential therapeutic implications. However, additional experiments are needed to ascribe the metabolic reprogramming to BK channels located in mitochondria.