Lithocholic bile acid selectively kills neuroblastoma cells, while sparing normal neuronal cells

Area of Science:

• Oncology
• Cell Biology
• Aging Research

Background:

• Aging is a primary risk factor for cancer development.
• Pharmacological and dietary interventions can delay cancer onset.
• Lithocholic acid (LCA) has shown promise in extending longevity in yeast models.

Purpose of the Study:

• To investigate the anti-tumor effects of LCA on human neuroblastoma (NB) cell lines.
• To determine the mechanisms of LCA-induced cell death.
• To assess the differential effects of LCA on cancer cells versus primary neurons.

Main Methods:

• Treatment of NB cell lines (BE(2)-m17, SK-n-SH, SK-n-MCIXC, Lan-1) and primary human neurons with LCA.
• Analysis of cell death pathways (apoptosis, mitochondrial pathways, death receptor pathways).
• Assessment of cellular response to hydrogen peroxide-induced oxidative stress.

Main Results:

• LCA induced apoptotic cell death in BE(2)-m17, SK-n-SH, and SK-n-MCIXC cells, but not in Lan-1 cells.
• Low LCA concentrations sensitized specific NB cells to oxidative stress-induced apoptosis while protecting primary neurons.
• LCA activated both intrinsic (mitochondrial) and extrinsic (death receptor) apoptotic pathways in sensitive NB cells.
• LCA exhibited anti-tumor activity against human breast cancer and rat glioma cells.

Conclusions:

• LCA possesses a potent and selective anti-tumor effect on cultured human neuroblastoma cells.
• LCA-induced cell death involves the activation of multiple apoptotic pathways.
• LCA demonstrates a protective effect on primary neurons against oxidative stress.
• LCA shows broad-spectrum anti-tumor potential across different cancer types and species.