Title : Mediation by arachidonic acid metabolites of the H2O2-induced stimulation of mitogen-activated protein kinases (extracellular-signal-regulated kinase and c-Jun NH2-terminal kinase).

Pub. Date : 1997 Mar 1

PMID : 9119028






13 Functional Relationships(s)
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1 Recently, H2O2 has been reported to stimulate the activity of the mitogen-activated protein kinases (MAPKs) ERK and JNK, and the expression of the proto-oncogenes c-fos and c-jun. Hydrogen Peroxide mitogen-activated protein kinase 8 Homo sapiens
2 The result was positive, a maximum of stimulation being reached with 200 microM H2O2 (0.3 pmol H2O2/cell) for both ERK and JNK. Hydrogen Peroxide mitogen-activated protein kinase 8 Homo sapiens
3 The result was positive, a maximum of stimulation being reached with 200 microM H2O2 (0.3 pmol H2O2/cell) for both ERK and JNK. Hydrogen Peroxide mitogen-activated protein kinase 8 Homo sapiens
4 Moreover, the stimulation by H2O2 of ERK and JNK was decreased by phospholipase A2 activity inhibitors. Hydrogen Peroxide mitogen-activated protein kinase 8 Homo sapiens
5 When astrocytes were incubated first with eicosatetraynoic acid, a structural analogue competing in arachidonic acid metabolism, the stimulation of JNK by H2O was also inhibited, suggesting the involvement of arachidonic acid metabolites. ETYA mitogen-activated protein kinase 8 Homo sapiens
6 When astrocytes were incubated first with eicosatetraynoic acid, a structural analogue competing in arachidonic acid metabolism, the stimulation of JNK by H2O was also inhibited, suggesting the involvement of arachidonic acid metabolites. Water mitogen-activated protein kinase 8 Homo sapiens
7 When astrocytes were incubated first with eicosatetraynoic acid, a structural analogue competing in arachidonic acid metabolism, the stimulation of JNK by H2O was also inhibited, suggesting the involvement of arachidonic acid metabolites. Arachidonic Acid mitogen-activated protein kinase 8 Homo sapiens
8 Furthermore, H2O2 likely induced the expression of CL100/PAC1/MKP-1, a dual specificity phosphatase which has been implicated in ERK and JNK inactivation in the nucleus. Hydrogen Peroxide mitogen-activated protein kinase 8 Homo sapiens
9 Finally, the prior treatment of astrocytes with MK886, a 5-lipoxygenase-activating protein inhibitor, prevented JNK from stimulation, but did not prevent thymidine incorporation from inhibition, both induced by H2O2. MK-886 mitogen-activated protein kinase 8 Homo sapiens
10 These results strongly suggest an involvement of arachidonic acid and/or its metabolites in the stimulation of both ERK and JNK following the oxidative stress evoked by H2O2, which induced a cell cycle arrest probably independent of the stimulation of JNK. Arachidonic Acid mitogen-activated protein kinase 8 Homo sapiens
11 These results strongly suggest an involvement of arachidonic acid and/or its metabolites in the stimulation of both ERK and JNK following the oxidative stress evoked by H2O2, which induced a cell cycle arrest probably independent of the stimulation of JNK. Arachidonic Acid mitogen-activated protein kinase 8 Homo sapiens
12 These results strongly suggest an involvement of arachidonic acid and/or its metabolites in the stimulation of both ERK and JNK following the oxidative stress evoked by H2O2, which induced a cell cycle arrest probably independent of the stimulation of JNK. Hydrogen Peroxide mitogen-activated protein kinase 8 Homo sapiens
13 These results strongly suggest an involvement of arachidonic acid and/or its metabolites in the stimulation of both ERK and JNK following the oxidative stress evoked by H2O2, which induced a cell cycle arrest probably independent of the stimulation of JNK. Hydrogen Peroxide mitogen-activated protein kinase 8 Homo sapiens