title: Transcriptional profiling of gene expression patterns during sphingosine 1-phosphate-induced mesangial cell proliferation.
abstract: Sphingosine 1-phosphate (S1P) is known to regulate cell proliferation, apoptosis, and motility. Recently, we have reported that S1P and its analogue dihydro-S1P (DHS1P) promote proliferation of rat cultured mesangial cells. To investigate the signaling mechanisms underlying S1P- and DHS1P-induced mesangial cell proliferation, we performed cDNA microarray analysis of gene expression during mesangial cell proliferation. In terms of the overall pattern, gene expression waves induced by S1P and DHS1P were similar to those induced by a potent mesangial mitogen platelet-derived growth factor (PDGF), whereas we found several genes, such as two growth factors, connective tissue growth factor (CTGF) and heparin-binding EGF-like growth factor (HB-EGF), which were induced by the sphingolipids, but not by PDGF. Cluster analysis also identified calcium-dependent molecules highly expressed in DHS1P-stimulated cells compared to S1P-stimulated cells. Calcium mobilization analysis showed that DHS1P had higher magnitudes of intracellular calcium mobilization than S1P, suggesting that S1P and DHS1P differentially regulate intracellular calcium mobilization, possibly leading to different gene expression in mesangial cells. The large-scale monitoring of gene expression performed here allows us to identify S1P-induced transcriptional properties during mesangial cell proliferation.
authors.affiliation: Department of Molecular, Cell Pharmacology, National Center for Child Health and Development Research Institute, 3-35-31 Taishido, Setagaya-Ku, Tokyo 154-8567, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Katsuma
authors.forename: Yuko
authors.initials: Y
authors.lastname: Hada
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shiojima
authors.forename: Akira
authors.initials: A
authors.lastname: Hirasawa
authors.forename: Akito
authors.initials: A
authors.lastname: Tanoue
authors.forename: Kazuchika
authors.initials: K
authors.lastname: Takagaki
authors.forename: Tadaaki
authors.initials: T
authors.lastname: Ohgi
authors.forename: Junichi
authors.initials: J
authors.lastname: Yano
authors.forename: Gozoh
authors.initials: G
authors.lastname: Tsujimoto
mesh_terms: D000818:Animals; D002118:Calcium / Q000032:analysis; D002455:Cell Division; D020869:Gene Expression Profiling; D005920:Glomerular Mesangium / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism*; D007700:Kinetics; D008246:Lysophospholipids; D020411:Oligonucleotide Array Sequence Analysis; D051381:Rats; D013110:Sphingosine / Q000031:analogs & derivatives* / Q000494:pharmacology*; D014158:Transcription, Genetic
chemical_list: D008246:Lysophospholipids; C060506:sphingosine 1-phosphate; D013110:Sphingosine; D002118:Calcium