Premium
4‐HPR modulates gene expression in ovarian cells
Author(s) -
Brewer Molly,
Kirkpatrick Nathaniel D.,
Wharton J. Taylor,
Wang Jian,
Hatch Kenneth,
Auersperg Nelly,
Utzinger Urs,
Gershenson David,
Bast Robert,
Zou Changping
Publication year - 2006
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.21797
Subject(s) - ovarian cancer , cancer research , microarray analysis techniques , biology , cancer cell , cancer , microarray , blot , apoptosis , gene expression , gene , genetics
Ovarian cancer has a high rate of recurrence and subsequent mortality following chemotherapy despite intense efforts to improve treatment outcomes. Recent trials have suggested that retinoids, especially 4‐( N ‐hydroxyphenyl) retinamide (4‐HPR), play an important role as a chemopreventive agent and are currently being used in clinical trials for ovarian cancer chemoprevention as well as treatment. This study examines the mechanism of its activity in premalignant and cancer cells. We investigated the modulation of gene expression by 4‐HPR in immortalized ovarian surface epithelial (IOSE) cells and ovarian cancer (OVCA433) cells with DNA microarray. Real time RT‐PCR and western blotting were used to confirm the microarray results and metabolic changes were examined with optical fluorescence spectroscopy. 4‐HPR resulted in an up‐regulation of expression of proapoptotic genes and mitochondrial uncoupling protein in OVCA433 cells and modulation of the RXR receptors in IOSE cells, and down‐regulation of mutant BRCA genes in both IOSE and OVCA433 cells. 4‐HPR had a larger effect on the redox in the 433 cells compared to IOSE. These findings suggest that 4‐HPR acts through different mechanisms in premalignant ovarian surface cells and cancer cells, with a preventive effect in premalignant cells and a treatment effect in cancer cells. © 2006 Wiley‐Liss, Inc.