title: 9-Hydroxystearic acid upregulates p21(WAF1) in HT29 cancer cells.
abstract: Growing evidence supports the critical role of lipid peroxidation products in the control of cell proliferation. In previous studies we demonstrated the efficient restriction of the proliferation rate in several cell lines resulting from the in vitro treatment with endogenous lipid polar components of cell membranes. Among these, 9-hydroxystearic acid (9-HSA), a primary intermediate of lipid peroxidation, induced a significant arrest in G0/G1 in HT29 colon cancer cells. In response to 9-HSA treatment of HT29 we observed cell growth arrest and increase in p21(WAF1) expression both at the transcriptional and the translational levels. Growth of p21(WAF1)-deleted HCT116 human colon carcinoma cells was not inhibited by 9-HSA. We present evidence that p21(WAF1) is required for 9-HSA mediated growth arrest in human colon carcinoma cells.
authors.affiliation: Department of Biochemistry G. Moruzzi, University of Bologna, Bologna, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Calonghi
authors.forename: C
authors.initials: C
authors.lastname: Cappadone
authors.forename: E
authors.initials: E
authors.lastname: Pagnotta
authors.forename: G
authors.initials: G
authors.lastname: Farruggia
authors.forename: F
authors.initials: F
authors.lastname: Buontempo
authors.forename: C
authors.initials: C
authors.lastname: Boga
authors.forename: G L
authors.initials: GL
authors.lastname: Brusa
authors.forename: M A
authors.initials: MA
authors.lastname: Santucci
authors.forename: L
authors.initials: L
authors.lastname: Masotti
mesh_terms: D000970:Antineoplastic Agents / Q000378:metabolism / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D003110:Colonic Neoplasms / Q000378:metabolism* / Q000473:pathology*; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins / Q000378:metabolism*; D006801:Humans; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D013229:Stearic Acids / Q000378:metabolism* / Q000494:pharmacology; D015854:Up-Regulation / Q000187:drug effects
chemical_list: D000970:Antineoplastic Agents; C493956:CDKN1A protein, human; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins; D013229:Stearic Acids; C070375:9-hydroxystearic acid