title: 5-Aminosalicylic acid inhibits TGF-beta1 signalling in colorectal cancer cells.
abstract: The transforming growth factor-beta (TGF-beta) pathway is an important pathway in the initiation and progression of colorectal cancer. We aimed to determine the effects of 5-aminosalicylic acid (5-ASA) on TGF-beta signalling in colorectal cancer cells in vitro. 5-ASA inhibited TGF-beta1 signalling in HCT116 cells and colonic fibroblasts, as judged by a TGF-beta-specific reporter gene assay, plasminogen activator inhibitor-1 mRNA and protein levels, fibroblast trans-differentiation, Smad3 phosphorylation and nuclear translocation. We conclude that 5-ASA inhibits TGF-beta1 signalling in colorectal cancer cells, and might be a potent adjuvant therapeutic drug, interfering with aberrant TGF-beta signalling in colorectal cancer.
authors.affiliation: Department of Gastroenterology-Hepatology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands.
authors.forename: Pim J
authors.initials: PJ
authors.lastname: Koelink
authors.forename: Lukas J A C
authors.initials: LJ
authors.lastname: Hawinkels
authors.forename: Eliza
authors.initials: E
authors.lastname: Wiercinska
authors.forename: Cornelis F M
authors.initials: CF
authors.lastname: Sier
authors.forename: Peter
authors.initials: P
authors.lastname: ten Dijke
authors.forename: Cornelis B H W
authors.initials: CB
authors.lastname: Lamers
authors.forename: Daan W
authors.initials: DW
authors.lastname: Hommes
authors.forename: Hein W
authors.initials: HW
authors.lastname: Verspaget
mesh_terms: D021581:Active Transport, Cell Nucleus / Q000187:drug effects; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D045744:Cell Line, Tumor; D015179:Colorectal Neoplasms / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D006801:Humans; D019804:Mesalamine / Q000494:pharmacology*; D010766:Phosphorylation; D015398:Signal Transduction / Q000187:drug effects*; D051900:Smad3 Protein / Q000378:metabolism; D053773:Transforming Growth Factor beta1 / Q000037:antagonists & inhibitors*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; C497790:SMAD3 protein, human; D051900:Smad3 Protein; D053773:Transforming Growth Factor beta1; D019804:Mesalamine