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- W4245273383 abstract "The transcription factor GATA-4 plays a central role in the regulation of cardiac-muscle gene transcription. The present study demonstrates that endothelin-1 (ET-1) induces GATA-4 activation and phosphorylation. The treatment of HL-1 adult mouse atrial-muscle cells with ET-1 (30nM) caused a rapid increase in the DNA binding activity of GATA-4 within 3min. The activation was associated with an upward mobility shift of the GATA-4 band on native PAGE in an electrophoretic- mobility-shift assay. The upward shift of the GATA-4 band also occurred on SDS/PAGE as monitored by immunoblotting. The in vitro treatment of nuclear extracts with λ-protein phosphatase abolished the upward shift, indicating that GATA-4 was phosphorylated. ET-1 activated the p44/42 mitogen-activated protein kinase (MAPK) and the MAPK kinase (MEK) within 3min, and PD98059 (a specific inhibitor of MEK) abolished the ET-1-induced GATA-4 phosphorylation. PMA also caused the rapid activation of MAPK and the phosphorylation of GATA-4. In contrast, the activation of MAPK by phenylephrine or H2O2 was weak and did not lead to GATA-4 phosphorylation. Thus ET-1 induces a GATA-4 phosphorylation by activating a MEK–MAPK pathway." @default.
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- W4245273383 date "2001-10-08" @default.
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- W4245273383 title "Endothelin-1 induces phosphorylation of GATA-4 transcription factor in the HL-1 atrial-muscle cell line" @default.
- W4245273383 doi "https://doi.org/10.1042/bj3590375" @default.
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