ISSN:
0021-9541
Keywords:
Life and Medical Sciences
;
Cell & Developmental Biology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Medicine
Notes:
Interleukin 9 (IL-9) stimulates the proliferation of various hematopoietic cell types. To elucidate the molecular mechanisms underlying the cell proliferation action, immediate-early gene expression elicited by IL-9 in a human factor-dependent cell line, MO7e, was studied. IL-9 stimulation resulted in a rapid and transient elevation of primary response genes including junB and c-myc. The differential effects of protein kinase inhibitors, herbimycin A, genistein, and H-7 on the steady-state mRNA level and the transcription rate of junB and c-myc genes triggered by IL-9 were also investigated. Herbimycin A, but not genistein, specifically inhibited the expression of junB steady-state mRNA and the in vitro transcription of the junB gene. IL-9-enhanced c-myc gene expression was completely inhibited by both herbimycin A and genistein at the level of transcriptional initiation. H-7 failed to inhibit c-myc, but partially abolished junB mRNA induction. The role of protein kinase C in IL-9-mediated junB induction was also examined. The different responses of junB and c-myc messages to protein kinase inhibitors suggested that more than one pathway may be involved in IL-9-mediated signal transduction which leads to the expression of junB and c-myc genes. © 1995 Wiley-Liss, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jcp.1041630324
