title: Activin A induces phosphorylation of Smad2 but not complex formation of Smad2 with Smad4 in human colon cancer cell line HT-29.
abstract: Western blotting coupled with immunoprecipitation showed that activin A treatment induced phosphorylation of Smad2 but not complex formation of Smad2/4 in human colon cancer-derived HT-29 cells. Because HT-29 cells expressed neither Smad4 mRNA nor Smad4 protein, it is suggested that deletion of Smad4 leads to a defect of formation of Smad2/4 complex upon activin A stimulation in HT-29 cells.
authors.affiliation: Laboratory of Food Biochemistry, Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo, Japan.
authors.forename: Pimara
authors.initials: P
authors.lastname: Pholnukulkit
authors.forename: Kei
authors.initials: K
authors.lastname: Sonoyama
authors.forename: Jun
authors.initials: J
authors.lastname: Kawabata
mesh_terms: D028341:Activins / Q000235:genetics / Q000494:pharmacology*; D000818:Animals; D015153:Blotting, Western; D002460:Cell Line; D003110:Colonic Neoplasms / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000737:chemistry / Q000378:metabolism*; D015870:Gene Expression; D019073:HT29 Cells; D006801:Humans; D028322:Inhibin-beta Subunits / Q000235:genetics / Q000494:pharmacology*; D010766:Phosphorylation / Q000187:drug effects; D011233:Precipitin Tests; D012333:RNA, Messenger / Q000096:biosynthesis; D051381:Rats; D011994:Recombinant Proteins / Q000235:genetics / Q000494:pharmacology; D051899:Smad2 Protein; D051901:Smad4 Protein; D015534:Trans-Activators / Q000737:chemistry / Q000378:metabolism*
chemical_list: D004268:DNA-Binding Proteins; D012333:RNA, Messenger; D011994:Recombinant Proteins; C497782:SMAD2 protein, human; C497796:SMAD4 protein, human; D051899:Smad2 Protein; C497784:Smad2 protein, rat; D051901:Smad4 Protein; C490811:Smad4 protein, rat; D015534:Trans-Activators; C422405:activin A; D028341:Activins; D028322:Inhibin-beta Subunits