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Intrinsic electrical activity drives small-cell lung cancer progression

ABSTRACT: Intrinsic electrical activity drives small-cell lung cancer progression

PROVIDER: PRJNA1126122 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29471869.fastq.gz	Fastqsanger.gz
	SRR29471870.fastq.gz	Fastqsanger.gz
	SRR29471871.fastq.gz	Fastqsanger.gz
	SRR29471872.fastq.gz	Fastqsanger.gz
	SRR29471873.fastq.gz	Fastqsanger.gz

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Intrinsic electrical activity drives small-cell lung cancer progression

Project description:Elevated or ectopic expression of neuronal receptors and ion channels promotes tumor progression in many cancer types; neuroendocrine (NE) transformation of various adenocarcinomas has also been associated with increased aggressiveness. Whether the defining neuronal feature, namely electrical excitability, exists in cancer cells and whether this impacts cancer progression remains mostly unexplored. Small cell lung cancer (SCLC) is an archetypical example of highly aggressive NE cancers and is comprised of two major distinct subtypes of cancer cells: NE cells and non-NE cells. Here, we show that the NE cells are excitable, like neurons, while non-NE cells cannot fire action potentials, like astrocytes and other non-excitable cells. Action potential firing in NE cells directly promotes SCLC malignancy; however, the high ATP demand of electrical activity also leads to an unusual dependency on oxidative phosphorylation (OXPHOS) in NE cells. This finding contrasts with most cancer cells reported in the literature, which are non-excitable and heavily rely on aerobic glycolysis. Additionally, we find that non-NE cells metabolically support NE cells to supply their high ATP demand, promoting their excitability and malignancy, a process akin to the astrocyte-neuron metabolite shuttle. Lastly, we observe drastic changes in the innervation landscape during SCLC progression, which coincide with increased intratumoral heterogeneity (ITH) and elevated neuronal protein expression in SCLC cells, suggesting an induction of a tumor autonomous vicious cycle driven by cancer cell-intrinsic electrical activity, which confers long-term tumorigenic capability and metastatic potential.

2024-11-07 | GSE270281 | GEO

Intrinsic electrical activity drives small-cell lung cancer progression.

Project description:Elevated or ectopic expression of neuronal receptors promotes tumour progression in many cancer types1,2; neuroendocrine (NE) transformation of adenocarcinomas has also been associated with increased aggressiveness3. Whether the defining neuronal feature, namely electrical excitability, exists in cancer cells and impacts cancer progression remains mostly unexplored. Small-cell lung cancer (SCLC) is an archetypal example of a highly aggressive NE cancer and comprises two major distinct subpopulations: NE cells and non-NE cells4,5. Here we show that NE cells, but not non-NE cells, are excitable, and their action potential firing directly promotes SCLC malignancy. However, the resultant high ATP demand leads to an unusual dependency on oxidative phosphorylation in NE cells. This finding contrasts with the properties of most cancer cells reported in the literature, which are non-excitable and rely heavily on aerobic glycolysis. Additionally, we found that non-NE cells metabolically support NE cells, a process akin to the astrocyte-neuron metabolite shuttle6. Finally, we observed drastic changes in the innervation landscape during SCLC progression, which coincided with increased intratumoural heterogeneity and elevated neuronal features in SCLC cells, suggesting an induction of a tumour-autonomous vicious cycle, driven by cancer cell-intrinsic electrical activity, which confers long-term tumorigenic capability and metastatic potential.

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Kcnj2 regulates electrical activity-induced gene networks in embryonic mouse palate shelves.

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