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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Targeting of epidermal growth factor receptor by cyclopentenone prostaglandin 15-Deoxy-Delta12,14-prostaglandin J2 in human oral squamous carcinoma cells.

Antineoplastic properties of cyclopentenone 15-deoxy-Delta12,14-prostaglandin J2 (15d-PGJ2) involve peroxisome proliferator-activated receptor gamma (PPARgamma) dependent and independent mechanisms. We recently reported that 15d-PGJ2 inhibits cell growth and induces apoptosis in human oral squamous cell carcinoma ( SCC) partly independent of PPARgamma activation. Given the importance of epidermal growth factor receptor (EGFR) as a therapeutic target in head and neck SCC, we addressed the effects of 15d-PGJ2 on EGFR expression. 15d-PGJ2, but not other PPARgamma ligands, abrogated EGFR protein expression in oral SCC cells. 15d-PGJ2 also decreased EGFR mRNA, indicating downmodulation at the transcriptional level. Moreover, treatment with 9,10-dihydro-15d-PGJ2, a 15d-PGJ2 analog lacking the reactive carbonyl group, failed to effect EGFR expression. These findings provide evidence for EGFR downregulation in oral SCC cells through a novel anticancer effect of 15d-PGJ2 that is attributed to the reactive cyclopentenone ring system.[1]

References

  1. Targeting of epidermal growth factor receptor by cyclopentenone prostaglandin 15-Deoxy-Delta12,14-prostaglandin J2 in human oral squamous carcinoma cells. Siavash, H., Nikitakis, N.G., Sauk, J.J. Cancer Lett. (2004) [Pubmed]
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