Title : Interleukin-3 inhibits cycloheximide induction of C-jun mRNA in human monocytes: possible role for a serine/threonine phosphatase.

Pub. Date : 1993 Sep

PMID : 8395533






6 Functional Relationships(s)
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1 Interleukin-3 inhibits cycloheximide induction of C-jun mRNA in human monocytes: possible role for a serine/threonine phosphatase. Cycloheximide Jun proto-oncogene, AP-1 transcription factor subunit Homo sapiens
2 Cycloheximide is a strong inducer of the c-jun protooncogene mRNA at concentrations (< or = 50 ng/ml) that do not inhibit protein synthesis in human monocytes. Cycloheximide Jun proto-oncogene, AP-1 transcription factor subunit Homo sapiens
3 The pluripotent colony stimulating factor interleukin-3 (IL-3) (10 ng/ml) is also a modest inducer of the c-jun gene in these cells; however, in combination with cycloheximide, IL-3 dramatically reduces the c-jun induction below levels induced by cycloheximide alone. Cycloheximide Jun proto-oncogene, AP-1 transcription factor subunit Homo sapiens
4 Preincubation of monocytes with 12.5 nM okadaic acid (a potent inhibitor of protein phosphatases 1 and 2A) and cycloheximide prior to addition of IL-3 restored the level of c-jun induction to that mediated by cycloheximide alone. Cycloheximide Jun proto-oncogene, AP-1 transcription factor subunit Homo sapiens
5 Preincubation of monocytes with 12.5 nM okadaic acid (a potent inhibitor of protein phosphatases 1 and 2A) and cycloheximide prior to addition of IL-3 restored the level of c-jun induction to that mediated by cycloheximide alone. Cycloheximide Jun proto-oncogene, AP-1 transcription factor subunit Homo sapiens
6 These observations suggest that activation of protein serine/threonine phosphatase(s) underlies the ability of IL-3 to inhibit cycloheximide induction of c-jun in monocytes. Cycloheximide Jun proto-oncogene, AP-1 transcription factor subunit Homo sapiens