title: 15-Deoxy-delta 12, 14-prostaglandin J2 induces upregulation of multidrug resistance-associated protein 1 via Nrf2 activation in human breast cancer cells.
abstract: 15-Deoxy-Delta(12,14)-prostaglandin J(2) (15d-PGJ(2)), a representative J-series cyclopentenone prostaglandin, exerts cytoprotective effects that are mainly mediated by Nrf2. Nrf2 is a major transcription factor involved in the transactivation of genes encoding many phase 2 detoxifying and antioxidant enzymes via interaction with the antioxidant response element (ARE). Recently it has been reported that expression of phase 3 efflux transporters, such as multidrug resistance-associated proteins (MRPs), is also regulated by Nrf2. It is well known that cancer cells overexpressing MRPs are more resistant to anticancer drugs. In the present study we have found that 15d-PGJ(2) induces the expression of MRP1, one of the phase 3 efflux transporters, in human breast cancer cells (MCF-7). In addition, treatment of MCF-7 cells with 15d-PGJ(2) resulted in nuclear translocation and DNA binding of Nrf2. In contrast to 15d-PGJ(2), 9,10-dihydro-15d-PGJ(2), an analogue of 15d-PGJ(2) that lacks an electrophilic cyclopentenone ring moiety, failed to induce not only Nrf2 activation but also MRP1 upregulation in MCF-7 cells. 15d-PGJ(2)-induced MRP1 overexpression was abrogated by Nrf2 gene knockdown, using RNA interference. These results, taken together, suggest that 15d-PGJ(2) induces MRP1 upregulation via Nrf2-ARE signaling.
authors.affiliation: Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea.
authors.forename: Na-Young
authors.initials: NY
authors.lastname: Song
authors.forename: Do-Hee
authors.initials: DH
authors.lastname: Kim
authors.forename: Eun-Hee
authors.initials: EH
authors.lastname: Kim
authors.forename: Hye-Kyung
authors.initials: HK
authors.lastname: Na
authors.forename: Young-Joon
authors.initials: YJ
authors.lastname: Surh
mesh_terms: D015153:Blotting, Western; D001943:Breast Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D045744:Cell Line, Tumor; D024202:Electrophoretic Mobility Shift Assay; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D015394:Molecular Structure; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000235:genetics / Q000378:metabolism*; D051267:NF-E2-Related Factor 2 / Q000235:genetics / Q000378:metabolism*; D009841:Oligonucleotides / Q000235:genetics / Q000378:metabolism; D015230:Prostaglandin D2 / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D011485:Protein Binding; D034741:RNA, Small Interfering / Q000235:genetics; D020218:Response Elements / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014162:Transfection; D015854:Up-Regulation / Q000187:drug effects*
chemical_list: D027425:ATP-Binding Cassette, Sub-Family C Proteins; D051267:NF-E2-Related Factor 2; D009841:Oligonucleotides; D015230:Prostaglandin D2; D034741:RNA, Small Interfering; C097240:15-deoxy-delta(12,14)-prostaglandin J2; C495635:NFE2L2 protein, human; C421109:multidrug resistance-associated protein 1