title: PDGF-BB induces MAP kinase phosphorylation and VEGF expression in neurofibroma-derived cultured cells from patients with neurofibromatosis 1.
abstract: Neurofibromas of neurofibromatosis 1 (NF1) are highly vascular. Because the number of PDGF beta receptors in neurofibroma-derived cultured cells (NF-derived cells) has been reported to be increased, we tested whether platelet-derived growth factor BB (PDGF-BB) could induce expression of vascular endothelial growth factor (VEGF) in NF-derived cells. When analysed by reverse transcription-polymerase chain reaction, VEGF mRNA expression was found to be stimulated by PDGF-BB and TGF-beta1. Those growth factors stimulated the secretion of VEGF from NF-derived cells. PDGF-BB furthermore induced the mitogen-activated protein kinase phosphorylation in NF-derived cells from patients with NF1. In conclusion, PDGF-BB stimulated VEGF secretion in NF-derived cells, and this stimulation is probably important in neurofibroma hypervascularization.
authors.affiliation: Department of Dermatology, Institute of Clinical Medicine, University of Tsukuba, Tsukuaba, Ibaraki 305-8575, Japan.
authors.forename: Tomoe
authors.initials: T
authors.lastname: Kotsuji-Maruyama
authors.forename: Sumihisa
authors.initials: S
authors.lastname: Imakado
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kawachi
authors.forename: Fujio
authors.initials: F
authors.lastname: Otsuka
mesh_terms: D000368:Aged; D001483:Base Sequence; D000077214:Becaplermin; D002478:Cells, Cultured; D016228:Endothelial Growth Factors / Q000378:metabolism*; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism*; D008222:Lymphokines / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D020928:Mitogen-Activated Protein Kinases / Q000187:drug effects / Q000378:metabolism*; D008969:Molecular Sequence Data; D009456:Neurofibromatosis 1 / Q000201:enzymology* / Q000503:physiopathology*; D010766:Phosphorylation; D010982:Platelet-Derived Growth Factor / Q000494:pharmacology*; D020574:Proto-Oncogene Proteins c-sis; D012333:RNA, Messenger / Q000032:analysis*; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D012680:Sensitivity and Specificity; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
chemical_list: D016228:Endothelial Growth Factors; D036341:Intercellular Signaling Peptides and Proteins; D008222:Lymphokines; D010982:Platelet-Derived Growth Factor; D020574:Proto-Oncogene Proteins c-sis; D012333:RNA, Messenger; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors; D000077214:Becaplermin; D020928:Mitogen-Activated Protein Kinases