title: Aspirin-induced apoptosis in jurkat cells is not mediated by peroxisome proliferator-activated receptor delta.
abstract: Nonsteroidal antiinflammatory drugs may induce apoptosis via inhibition of peroxisome proliferator-activated receptor delta (PPARdelta) activity. Here we analyze the role of PPARdelta in aspirin-induced apoptosis of Jurkat cells, which, together with other lymphoid cell lines, express PPARdelta mRNA. Aspirin increased PPARdelta mRNA levels in Jurkat cells, but decreased the activity of both PPARdelta and PPARalpha/gamma, assayed using the luciferase reporter constructs DRE and ACO, respectively. The DNA binding of PPARdelta was not affected by 10 mM aspirin, which induces apoptosis in Jurkat cells. Moreover, neither addition of a specific ligand of PPARdelta nor transient transfection of PPARdelta expression vectors protected Jurkat cells from aspirin-induced apoptosis. These results indicate that PPARdelta is not involved in aspirin-induced apoptosis. Therefore, the mechanism by which aspirin mediates cell death in Jurkat cells remains unknown.
authors.affiliation: Unitat de Bioquímica, Departament de Ciències Fisiològiques II, Universitat de Barcelona, Campus de Bellvitge, E-08907 L'Hospitalet, Spain. jose.lopez@crg.es
authors.forename: José M
authors.initials: JM
authors.lastname: López
authors.forename: Manuel A
authors.initials: MA
authors.lastname: Fernández
authors.forename: Maria
authors.initials: M
authors.lastname: Piqué
authors.forename: Joan
authors.initials: J
authors.lastname: Gil
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D001241:Aspirin / Q000494:pharmacology*; D005786:Gene Expression Regulation / Q000187:drug effects; D005822:Genetic Vectors; D006801:Humans; D019169:Jurkat Cells; D008024:Ligands; D047493:PPAR alpha / Q000096:biosynthesis / Q000235:genetics; D047494:PPAR delta / Q000096:biosynthesis* / Q000235:genetics; D047495:PPAR gamma / Q000096:biosynthesis / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis; D015398:Signal Transduction / Q000187:drug effects; D014158:Transcription, Genetic / Q000187:drug effects; D014162:Transfection
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D008024:Ligands; D047493:PPAR alpha; D047494:PPAR delta; D047495:PPAR gamma; D012333:RNA, Messenger; D001241:Aspirin