Stimulation of lipocalin-type prostaglandin D synthase by retinoic acid coincides with inhibition of cell proliferation in human 3AO ovarian cancer cells.
Lipocalin-type prostaglandin D synthase (LPGDS; PGH(2)D-isomerase; EC 5.3.99.2) is a bifunctional protein first identified in the mammalian brain. It acts as a PGD(2)-producing enzyme and a retinoid transporter. Recent studies have shown that LPGDS is anomalously expressed in ovarian tumors and that retinoid may have a role as an ovarian cancer chemotherapeutic agent. To determine whether there is a relationship between retinoid and LPGDS in ovarian tumors, we examined the regulation of the gene encoding LPGDS by all-trans retinoic acid (RA). Real-time quantitative RT-PCR analysis showed that RA strongly induced the accumulation of LPGDS mRNA in human 3AO ovarian cancer cells. Furthermore, treatment of the cells with RA induced the synthesis and secretion of LPGDS into the culture medium. This increased expression of LPGDS was accompanied by an inhibition of cell proliferation in the ovarian cancer cells. Prostaglandin D synthase, ovarian cancer, retinoic acid, real-time quantitative RT-PCR.
Su
Bing
B
Center of Laboratory Medicine, Hua Shan Hospital, 12 Central Urumqi Road, Fudan University, Shanghai 200040, China.
Guan
Ming
M
Xia
Jing
J
Lu
Yuan
Y
D002352:Carrier Proteins / Q000096:biosynthesis; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D005260:Female; D006131:Growth Inhibitors / Q000494:pharmacology*; D006801:Humans; D019746:Intramolecular Oxidoreductases / Q000096:biosynthesis*; D054835:Lipocalin 1; D054834:Lipocalins; D010051:Ovarian Neoplasms / Q000201:enzymology*; D014212:Tretinoin / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
D002352:Carrier Proteins; D006131:Growth Inhibitors; C518443:LCN1 protein, human; D054835:Lipocalin 1; D054834:Lipocalins; D014212:Tretinoin; D019746:Intramolecular Oxidoreductases; C022466:prostaglandin R2 D-isomerase