Requirement of c-jun transcription factor on the mouse mast cell protease-6 expression in the mast cells.
Mast cell tryptases may be a key mediator in mast cell-mediated inflammatory reactions, and these expressions can be regulated by microenvironmental factors of tissues, particularly stem cell factor. In the present study, we investigated whether the transcription of mouse mast cell protease-6 (mMCP-6) gene was caused by SCF-mediated c-jun. We observed that mMCP-6 mRNA was expressed by overexpression of c-jun in the immature mast cell line in which both mMCP-6 and c-kit receptor are negative. The c-jun increased synergistically the luciferase activity of mMCP-6 promoter through the direct interaction with mi transcription factor (MITF). The synergic effect of c-jun with MITF was abolished by deletion of sequence between nt -171 and -151 in the mMCP-6 promoter. Furthermore, the level of mMCP-6 mRNA in mast cells was attenuated by the introduction of dominant negative c-jun (TAM-67) and the treatment of Jun N-terminal kinase inhibitor, SP600125. These results show that c-jun might play a role in regulating the transcription of mMCP-6 gene in mast cells stimulated by SCF.
Department of Immunology, Chonbuk National University Medical School, Jeonbuk, Republic of Korea.
Dae-Ki
DK
Kim
Young-Mi
YM
Lee
D000818:Animals; D001483:Base Sequence; D004268:DNA-Binding Proteins / Q000378:metabolism; D005786:Gene Expression Regulation / Q000502:physiology*; D008407:Mast Cells / Q000201:enzymology* / Q000378:metabolism; D051379:Mice; D051739:Microphthalmia-Associated Transcription Factor; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000378:metabolism; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism*; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D012697:Serine Endopeptidases / Q000096:biosynthesis / Q000235:genetics*; D019089:Stem Cell Factor / Q000378:metabolism; D014157:Transcription Factors / Q000378:metabolism; D014162:Transfection; D053802:Tryptases
D004268:DNA-Binding Proteins; D051739:Microphthalmia-Associated Transcription Factor; C497235:Mitf protein, mouse; D010446:Peptide Fragments; D016755:Proto-Oncogene Proteins c-jun; D012333:RNA, Messenger; D019089:Stem Cell Factor; C439528:TAM67 peptide; C509190:Tpsb2 protein, mouse; D014157:Transcription Factors; D019009:Proto-Oncogene Proteins c-kit; D012697:Serine Endopeptidases; C509222:Tpsab1 protein, mouse; C509223:Tpsab1 protein, rat; C509221:Tpsb2 protein, rat; D053802:Tryptases