The biotoxin BMAA promotes mesenchymal transition in neuroblastoma cells
Moore, E.; Renner, A.; Dowden, T.; Messer, D.; Hansen, H.; Mull, M.; Goebel, A.; Mawawa, G.; Burton, B.; Pawlus, M. R.
Show abstract
Mesenchymal-like cancer cells are an indicator of malignant tumors as they exhibit tumorigenic properties including downregulation of differentiation markers, and increased colony-forming potential, motility, and chemoresistance. We have previously demonstrated that the cyanobacterial biotoxin beta-methylamino-L-alanine (BMAA) is capable of influencing neural cell differentiation state through mechanisms involving the Wnt signaling pathway, suggesting the possibility that BMAA may play a role in influencing other Wnt related differentiation processes including mesenchymal transition. In this study we present evidence characterizing the effects of BMAA on mesenchymal transition in a human neuroblastoma cell line and provide support for the hypothesis that the biotoxin can promote this process in these cells by altering differentiation state, inducing changes in gene expression, and changing cellular function in manners consistent with cellular mesenchymal transition. Results of this study indicate that BMAA exposure may promote carcinogenesis through its effects on cell differentiation state in certain contexts. These results suggest that exposure to the biotoxin BMAA may be an influencing factor in chemotherapy resistance and cancer relapse in neuroblastoma.
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