title: Regulatory effect of phorbol esters on sphingosine kinase in BALB/C 3T3 fibroblasts (variant A31): demonstration of cell type-specific response--a preliminary note.
abstract: Sphingosine-1-phosphate (Sph-1-P) has been implicated as a second messenger in control of cell motility and proliferation (e.g., Sadahira Y, et al., PNAS 89:9686, 1992; Olivera A & Spiegel S, Nature 365:557, 1993). The control mechanism for its synthesis, as catalyzed by sphingosine kinase, is crucial in signal transduction. Synthesis of Sph-1-P in Balb/c 3T3 fibroblasts (A31 variant) is strongly up-regulated by brief treatment of cells with 12-O-tetradecanoylphorbol-13-acetate (TPA). Level of Sph-1-P in PKC-depleted cells is 10-fold higher than in undepleted cells, and a further 5-fold increase occurs after treatment with TPA. In Swiss 3T3 and B16 melanoma cells, Sph-1-P level was unaffected by TPA treatment. Thus, the effect of TPA on Sph-1-P synthesis appears to be cell type-specific.
authors.affiliation: Biomembrane Institute, Seattle, WA 98119.
authors.forename: N
authors.initials: N
authors.lastname: Mazurek
authors.forename: T
authors.initials: T
authors.lastname: Megidish
authors.forename: S
authors.initials: S
authors.lastname: Hakomori
authors.forename: Y
authors.initials: Y
authors.lastname: Igarashi
mesh_terms: D019307:1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine; D016475:3T3 Cells; D000470:Alkaloids / Q000494:pharmacology; D000818:Animals; D015153:Blotting, Western; D004591:Electrophoresis, Polyacrylamide Gel; D005347:Fibroblasts / Q000201:enzymology; D007527:Isoenzymes / Q000037:antagonists & inhibitors / Q000302:isolation & purification / Q000378:metabolism; D007546:Isoquinolines / Q000494:pharmacology; D007700:Kinetics; D008246:Lysophospholipids; D051379:Mice; D008807:Mice, Inbred BALB C; D017853:Phosphotransferases (Alcohol Group Acceptor) / Q000378:metabolism*; D010879:Piperazines / Q000494:pharmacology; D011493:Protein Kinase C / Q000037:antagonists & inhibitors / Q000302:isolation & purification / Q000378:metabolism; D013110:Sphingosine / Q000031:analogs & derivatives / Q000378:metabolism; D019311:Staurosporine; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*; D000099157:Sphingosine Kinase
chemical_list: D019307:1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine; D000470:Alkaloids; D007527:Isoenzymes; D007546:Isoquinolines; D008246:Lysophospholipids; D017853:Phosphotransferases (Alcohol Group Acceptor); D010879:Piperazines; D011493:Protein Kinase C; D013110:Sphingosine; D019311:Staurosporine; D013755:Tetradecanoylphorbol Acetate; D000099157:Sphingosine Kinase; C060506:sphingosine 1-phosphate