The Journal of Toxicological Sciences
Online ISSN : 1880-3989
Print ISSN : 0388-1350
ISSN-L : 0388-1350
Toxicomics Report
Induction of the fatty acid 2-hydroxylase (FA2H) gene by Δ9-tetrahydrocannabinol in human breast cancer cells
Shuso Takeda, Mari Harada, Shengzhong Su, Shunsuke Okajima, Hiroko Miyoshi, Kazutaka Yoshida, Hajime Nishimura, Yoshiko Okamoto, Toshiaki Amamoto, Kazuhito Watanabe, Curtis J Omiecinski, Hironori Aramaki
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Keywords: Δ9-tetrahydrocannabinol, Fatty acid 2-hydroxylase, PPARα human breast cancer cells, Differentiation
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2013 Volume 38 Issue 2 Pages 305-308

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Abstract

To investigate gene(s) being regulated by ∆9-tetrahydrocannabinol (∆9-THC), we performed DNA microarray analysis of human breast cancer MDA-MB-231 cells, which are poorly differentiated breast cancer cells, treated with ∆9-THC for 48 hr at an IC50 concentration of approximately 25 µM. Among the highly up-regulated genes (> 10-fold) observed, fatty acid 2-hydroxylase (FA2H) was significantly induced (17.8-fold). Although the physiological role of FA2H has not yet been fully understood, FA2H has been shown to modulate cell differentiation. The results of Oil Red O staining after ∆9-THC exposure showed the distribution of lipid droplets (a sign of the differentiated phenotype) in cells. Taken together, the results obtained here indicate that FA2H is a novel ∆9-THC-regulated gene, and that ∆9-THC induces differentiation signal(s) in poorly differentiated MDA-MB-231 cells.

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© 2013 The Japanese Society of Toxicology
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