Title : Activation of AP-1 is required for bufalin-induced apoptosis in human leukemia U937 cells.

Pub. Date : 1998 Feb 12

PMID : 9488042






7 Functional Relationships(s)
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1 We report here the effect of bufalin on c-Jun N-terminal protein kinase (JNK), a member of the MAPK family, and on the signaling pathway downstream of MAPKs in U937 cells. bufalin mitogen-activated protein kinase 8 Homo sapiens
2 We report here the effect of bufalin on c-Jun N-terminal protein kinase (JNK), a member of the MAPK family, and on the signaling pathway downstream of MAPKs in U937 cells. bufalin mitogen-activated protein kinase 8 Homo sapiens
3 When U937 cells were treated with 10(-8) M bufalin, the activity of JNK1 was markedly elevated 3 h after the start of treatment and remained so for 9 h. This activation of JNK and the induction of apoptosis by bufalin were suppressed by expression of antisense mRNA for MAPK kinase-1. bufalin mitogen-activated protein kinase 8 Homo sapiens
4 When U937 cells were treated with 10(-8) M bufalin, the activity of JNK1 was markedly elevated 3 h after the start of treatment and remained so for 9 h. This activation of JNK and the induction of apoptosis by bufalin were suppressed by expression of antisense mRNA for MAPK kinase-1. bufalin mitogen-activated protein kinase 8 Homo sapiens
5 When U937 cells were treated with 10(-8) M bufalin, the activity of JNK1 was markedly elevated 3 h after the start of treatment and remained so for 9 h. This activation of JNK and the induction of apoptosis by bufalin were suppressed by expression of antisense mRNA for MAPK kinase-1. bufalin mitogen-activated protein kinase 8 Homo sapiens
6 When U937 cells were treated with 10(-8) M bufalin, the activity of JNK1 was markedly elevated 3 h after the start of treatment and remained so for 9 h. This activation of JNK and the induction of apoptosis by bufalin were suppressed by expression of antisense mRNA for MAPK kinase-1. bufalin mitogen-activated protein kinase 8 Homo sapiens
7 These results suggest that the activation of AP-1 via a MAPK cascade that includes JNK is required for the induction of apoptosis by bufalin in U937 cells. bufalin mitogen-activated protein kinase 8 Homo sapiens