Previous Article | Next Article ![]()
Molecular and Cellular Biology, January 1999, p. 889-898, Vol. 19, No. 1
Institute for Medical Microbiology,
University of Basel, Basel, Switzerland
Received 2 March 1998/Returned for modification 22 May
1998/Accepted 4 September 1998
Translation is regulated predominantly by an interplay between
cis elements at the 3' and 5' ends of mRNAs and
trans-acting proteins. Cyclosporin A (CsA), a calcineurin
antagonist and blocker of interleukin-2 (IL-2) transcription in T
cells, was found to inhibit translation of IL-3 mRNA in autocrine mast
cell tumor lines. The mechanism involved ribosome-associated poly(A)
shortening and required an intact AU-rich element in the 3'
untranslated region. FK506, another calcineurin inhibitor, shared the
effect. The translational inhibition by CsA was specific to
oncogenically induced lymphokines IL-3 and IL-4 but not to IL-6, c-jun,
and c-myc, which are expressed in the nonmalignant precursor cells. Furthermore, no translational down-regulation of the mRNA was observed
in IL-3-transfected precursor cells. These data suggest that
translational silencing is associated with the tumor phenotype.
0270-7306/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Cyclosporin A Promotes Translational Silencing of
Autocrine Interleukin-3 via Ribosome-Associated Deadenylation
*
Corresponding author. Mailing address: Institute for
Medical Microbiology, Petersplatz 10, CH-4003 Basel, Switzerland.
Phone: 061-267-31-11. Fax: 061-267-32-98. E-mail:
moroni{at}ubaclu.unibas.ch.
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»