Abstract
The immediate/early promoter/enhancer of cytomegalovirus (CMV promoter) is one of the most commonly used promoters for expression of transgenes in eukaryotic cells. In practice, the CMV promoter is often thought of as a constitutively active unregulated promoter. However, we have observed that transcription from the CMV promoter can be up-regulated by a variety of environmental stresses. Many forms of cellular stress stimulate MAP kinase signalling pathways, resulting in activation of stress-activated protein kinases [SAPKs, also called Jun N-terminal kinases (JNKs)] and p38 kinases. We have found that the same conditions that lead to activation of SAPK/JNKs and p38 kinases can also dramatically increase expression from the CMV promoter. Inhibitors of p38 kinases abolished basal transcription from the CMV promoter and completely blocked stress-induced up-regulation of the CMV promoter. Overexpression of a dominant negative JNK kinase had no effect on basal transcription, but significantly reduced up-regulation caused by stress. These results have grave implications for use of the CMV promoter. If the CMV promoter can be up-regulated by cellular stresses, inadvertent activation of the stress kinase pathways may complicate, if not invalidate, the interpretation of a wide range of experiments.
Full Text
The Full Text of this article is available as a PDF (83.1 KB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Baskar J. F., Smith P. P., Ciment G. S., Hoffmann S., Tucker C., Tenney D. J., Colberg-Poley A. M., Nelson J. A., Ghazal P. Developmental analysis of the cytomegalovirus enhancer in transgenic animals. J Virol. 1996 May;70(5):3215–3226. doi: 10.1128/jvi.70.5.3215-3226.1996. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Bruggeman C. A., Li F., Stals F. S. Pathogenicity: animal models. Scand J Infect Dis Suppl. 1995;99:43–50. [PubMed] [Google Scholar]
- Cuenda A., Rouse J., Doza Y. N., Meier R., Cohen P., Gallagher T. F., Young P. R., Lee J. C. SB 203580 is a specific inhibitor of a MAP kinase homologue which is stimulated by cellular stresses and interleukin-1. FEBS Lett. 1995 May 8;364(2):229–233. doi: 10.1016/0014-5793(95)00357-f. [DOI] [PubMed] [Google Scholar]
- Devary Y., Gottlieb R. A., Smeal T., Karin M. The mammalian ultraviolet response is triggered by activation of Src tyrosine kinases. Cell. 1992 Dec 24;71(7):1081–1091. doi: 10.1016/s0092-8674(05)80058-3. [DOI] [PubMed] [Google Scholar]
- Dérijard B., Raingeaud J., Barrett T., Wu I. H., Han J., Ulevitch R. J., Davis R. J. Independent human MAP-kinase signal transduction pathways defined by MEK and MKK isoforms. Science. 1995 Feb 3;267(5198):682–685. doi: 10.1126/science.7839144. [DOI] [PubMed] [Google Scholar]
- Fish K. N., Stenglein S. G., Ibanez C., Nelson J. A. Cytomegalovirus persistence in macrophages and endothelial cells. Scand J Infect Dis Suppl. 1995;99:34–40. [PubMed] [Google Scholar]
- Freshney N. W., Rawlinson L., Guesdon F., Jones E., Cowley S., Hsuan J., Saklatvala J. Interleukin-1 activates a novel protein kinase cascade that results in the phosphorylation of Hsp27. Cell. 1994 Sep 23;78(6):1039–1049. doi: 10.1016/0092-8674(94)90278-x. [DOI] [PubMed] [Google Scholar]
- Giasson B. I., Mushynski W. E. Aberrant stress-induced phosphorylation of perikaryal neurofilaments. J Biol Chem. 1996 Nov 29;271(48):30404–30409. doi: 10.1074/jbc.271.48.30404. [DOI] [PubMed] [Google Scholar]
- Han J., Lee J. D., Bibbs L., Ulevitch R. J. A MAP kinase targeted by endotoxin and hyperosmolarity in mammalian cells. Science. 1994 Aug 5;265(5173):808–811. doi: 10.1126/science.7914033. [DOI] [PubMed] [Google Scholar]
- Kyriakis J. M., Avruch J. Sounding the alarm: protein kinase cascades activated by stress and inflammation. J Biol Chem. 1996 Oct 4;271(40):24313–24316. doi: 10.1074/jbc.271.40.24313. [DOI] [PubMed] [Google Scholar]
- Meier R., Rouse J., Cuenda A., Nebreda A. R., Cohen P. Cellular stresses and cytokines activate multiple mitogen-activated-protein kinase kinase homologues in PC12 and KB cells. Eur J Biochem. 1996 Mar 15;236(3):796–805. doi: 10.1111/j.1432-1033.1996.00796.x. [DOI] [PubMed] [Google Scholar]
- Morgan I. M., Asano M., Håvarstein L. S., Ishikawa H., Hiiragi T., Ito Y., Vogt P. K. Amino acid substitutions modulate the effect of Jun on transformation, transcriptional activation and DNA replication. Oncogene. 1993 May;8(5):1135–1140. [PubMed] [Google Scholar]
- Sambucetti L. C., Cherrington J. M., Wilkinson G. W., Mocarski E. S. NF-kappa B activation of the cytomegalovirus enhancer is mediated by a viral transactivator and by T cell stimulation. EMBO J. 1989 Dec 20;8(13):4251–4258. doi: 10.1002/j.1460-2075.1989.tb08610.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Scholz M., Cinatl J., Gross V., Vogel J. U., Blaheta R. A., Freisleben H. J., Markus B. H., Doerr H. W. Impact of oxidative stress on human cytomegalovirus replication and on cytokine-mediated stimulation of endothelial cells. Transplantation. 1996 Jun 27;61(12):1763–1770. doi: 10.1097/00007890-199606270-00017. [DOI] [PubMed] [Google Scholar]
- Smeal T., Binetruy B., Mercola D. A., Birrer M., Karin M. Oncogenic and transcriptional cooperation with Ha-Ras requires phosphorylation of c-Jun on serines 63 and 73. Nature. 1991 Dec 12;354(6353):494–496. doi: 10.1038/354494a0. [DOI] [PubMed] [Google Scholar]
- Stamminger T., Fickenscher H., Fleckenstein B. Cell type-specific induction of the major immediate early enhancer of human cytomegalovirus by cyclic AMP. J Gen Virol. 1990 Jan;71(Pt 1):105–113. doi: 10.1099/0022-1317-71-1-105. [DOI] [PubMed] [Google Scholar]
- Wesselborg S., Bauer M. K., Vogt M., Schmitz M. L., Schulze-Osthoff K. Activation of transcription factor NF-kappaB and p38 mitogen-activated protein kinase is mediated by distinct and separate stress effector pathways. J Biol Chem. 1997 May 9;272(19):12422–12429. doi: 10.1074/jbc.272.19.12422. [DOI] [PubMed] [Google Scholar]
- Yan M., Dai T., Deak J. C., Kyriakis J. M., Zon L. I., Woodgett J. R., Templeton D. J. Activation of stress-activated protein kinase by MEKK1 phosphorylation of its activator SEK1. Nature. 1994 Dec 22;372(6508):798–800. doi: 10.1038/372798a0. [DOI] [PubMed] [Google Scholar]
- Zervos A. S., Faccio L., Gatto J. P., Kyriakis J. M., Brent R. Mxi2, a mitogen-activated protein kinase that recognizes and phosphorylates Max protein. Proc Natl Acad Sci U S A. 1995 Nov 7;92(23):10531–10534. doi: 10.1073/pnas.92.23.10531. [DOI] [PMC free article] [PubMed] [Google Scholar]