Abstract:
:Pretreatment of cells with 0.5 mM sodium arsenite (but not other activators of stress-activated MAP kinase cascades) prevents the activation of p21Ras and strongly suppresses the activation of c-Raf and the MAP kinase cascade by a variety of growth factors. Arsenite appears to exert its effect by preventing the guanine nucleotide exchange factor mSos from converting Ras to its active GTP-bound state. Exposure to arsenite may be a simple way of assessing whether Ras plays an essential role in mediating activation of the MAP kinase cascade by extracellular signals.
journal_name
Oncogenejournal_title
Oncogeneauthors
Doza YN,Hall-Jackson CA,Cohen Pdoi
10.1038/sj.onc.1202168subject
Has Abstractpub_date
1998-07-09 00:00:00pages
19-24issue
1eissn
0950-9232issn
1476-5594journal_volume
17pub_type
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