Abstract
We have recently shown that the synthesis of cyclooxygenase [also called prostaglandin (PG) synthase or PG endoperoxide synthase; 8,11,14-icosatrienoate, hydrogen-donor:oxygen oxidoreductase, EC 1.14.99.1] in human dermal fibroblasts is markedly stimulated by the cytokine interleukin 1 (IL-1). We now show that the temporal sequence of the induced synthesis of PG synthase can be separated into an early transcriptional (i.e., actinomycin D inhibitable) phase and a subsequent translational (cycloheximide but not actinomycin D inhibitable) phase and that IL-1 exerts its effect during the transcriptional phase. Phorbol 12-myristate 13-acetate also stimulates synthesis of PG synthase and, together with IL-1, produces a synergistic stimulatory effect. Inhibitors of protein kinase C activation abolished the stimulatory effect of IL-1, suggesting that protein kinase C activation is a critical event in the signal-transduction sequence of the IL-1-induced increase of PG synthase synthesis. The antiinflammatory glucocorticosteroids dexamethasone and triamcinolone, but not progesterone or testosterone, were potent inhibitors of PG synthase synthesis (complete inhibition at 20 nM; IC50, 1 nM) when added during the translational phase of the synthesis sequence. The glucocorticosteroid effect was blocked by RNA and protein synthesis inhibitors. This report suggests that glucocorticosteroids exert their effect via a newly synthesized protein, causing a profound translational control of PG synthase synthesis. This novel mechanism of suppression of arachidonate metabolism is distinct from any influence of steroids on phospholipase A2 activity.
Full text
PDF![1657](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9d49/286758/ab69b66e3196/pnas00245-0235.png)
![1658](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9d49/286758/8dcc5a05e400/pnas00245-0236.png)
![1659](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9d49/286758/177d1d5d2635/pnas00245-0237.png)
![1660](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9d49/286758/779ecb6e1c5c/pnas00245-0238.png)
![1661](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9d49/286758/8a5c1ac7d95d/pnas00245-0239.png)
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Aarsman A. J., Mynbeek G., van den Bosch H., Rothhut B., Prieur B., Comera C., Jordan L., Russo-Marie F. Lipocortin inhibition of extracellular and intracellular phospholipases A2 is substrate concentration dependent. FEBS Lett. 1987 Jul 13;219(1):176–180. doi: 10.1016/0014-5793(87)81212-7. [DOI] [PubMed] [Google Scholar]
- Albrightson C. R., Baenziger N. L., Needleman P. Exaggerated human vascular cell prostaglandin biosynthesis mediated by monocytes: role of monokines and interleukin 1. J Immunol. 1985 Sep;135(3):1872–1877. [PubMed] [Google Scholar]
- Brönnegård M., Andersson O., Edwall D., Lund J., Norstedt G., Carstedt-Duke J. Human calpactin II (lipocortin I) messenger ribonucleic acid is not induced by glucocorticoids. Mol Endocrinol. 1988 Aug;2(8):732–739. doi: 10.1210/mend-2-8-732. [DOI] [PubMed] [Google Scholar]
- Burch R. M., Axelrod J. Dissociation of bradykinin-induced prostaglandin formation from phosphatidylinositol turnover in Swiss 3T3 fibroblasts: evidence for G protein regulation of phospholipase A2. Proc Natl Acad Sci U S A. 1987 Sep;84(18):6374–6378. doi: 10.1073/pnas.84.18.6374. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Chamberlain J. P. Fluorographic detection of radioactivity in polyacrylamide gels with the water-soluble fluor, sodium salicylate. Anal Biochem. 1979 Sep 15;98(1):132–135. doi: 10.1016/0003-2697(79)90716-4. [DOI] [PubMed] [Google Scholar]
- Colamonici O. R., Trepel J. B., Vidal C. A., Neckers L. M. Phorbol ester induces c-sis gene transcription in stem cell line K-562. Mol Cell Biol. 1986 May;6(5):1847–1850. doi: 10.1128/mcb.6.5.1847. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Davidson F. F., Dennis E. A., Powell M., Glenney J. R., Jr Inhibition of phospholipase A2 by "lipocortins" and calpactins. An effect of binding to substrate phospholipids. J Biol Chem. 1987 Feb 5;262(4):1698–1705. [PubMed] [Google Scholar]
- Davidson F. F., Dennis E. A., Powell M., Glenney J. R., Jr Inhibition of phospholipase A2 by "lipocortins" and calpactins. An effect of binding to substrate phospholipids. J Biol Chem. 1987 Feb 5;262(4):1698–1705. [PubMed] [Google Scholar]
- Fan X. D., Goldberg M., Bloom B. R. Interferon-gamma-induced transcriptional activation is mediated by protein kinase C. Proc Natl Acad Sci U S A. 1988 Jul;85(14):5122–5125. doi: 10.1073/pnas.85.14.5122. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Flower R. J. Eleventh Gaddum memorial lecture. Lipocortin and the mechanism of action of the glucocorticoids. Br J Pharmacol. 1988 Aug;94(4):987–1015. doi: 10.1111/j.1476-5381.1988.tb11614.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Goerig M., Habenicht A. J., Heitz R., Zeh W., Katus H., Kommerell B., Ziegler R., Glomset J. A. sn-1,2-Diacylglycerols and phorbol diesters stimulate thromboxane synthesis by de novo synthesis of prostaglandin H synthase in human promyelocytic leukemia cells. J Clin Invest. 1987 Mar;79(3):903–911. doi: 10.1172/JCI112900. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Goppelt-Strübe M., Pfannkuche H. J., Gemsa D., Resch K. The diacylglycerols dioctanoylglycerol and oleoylacetylglycerol enhance prostaglandin synthesis by inhibition of the lysophosphatide acyltransferase. Biochem J. 1987 Nov 1;247(3):773–777. doi: 10.1042/bj2470773. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Greenberg M. E., Ziff E. B. Stimulation of 3T3 cells induces transcription of the c-fos proto-oncogene. Nature. 1984 Oct 4;311(5985):433–438. doi: 10.1038/311433a0. [DOI] [PubMed] [Google Scholar]
- Hidaka H., Inagaki M., Kawamoto S., Sasaki Y. Isoquinolinesulfonamides, novel and potent inhibitors of cyclic nucleotide dependent protein kinase and protein kinase C. Biochemistry. 1984 Oct 9;23(21):5036–5041. doi: 10.1021/bi00316a032. [DOI] [PubMed] [Google Scholar]
- Kelly K., Cochran B. H., Stiles C. D., Leder P. Cell-specific regulation of the c-myc gene by lymphocyte mitogens and platelet-derived growth factor. Cell. 1983 Dec;35(3 Pt 2):603–610. doi: 10.1016/0092-8674(83)90092-2. [DOI] [PubMed] [Google Scholar]
- Lefkowith J. B., Flippo V., Sprecher H., Needleman P. Paradoxical conservation of cardiac and renal arachidonate content in essential fatty acid deficiency. J Biol Chem. 1985 Dec 15;260(29):15736–15744. [PubMed] [Google Scholar]
- Moore P. K., Hoult J. R. Anti-inflammatory steroids reduce tissue PG synthetase activity and enhance PG breakdown. Nature. 1980 Nov 20;288(5788):269–270. doi: 10.1038/288269a0. [DOI] [PubMed] [Google Scholar]
- Nishizuka Y. Studies and perspectives of protein kinase C. Science. 1986 Jul 18;233(4761):305–312. doi: 10.1126/science.3014651. [DOI] [PubMed] [Google Scholar]
- Parker J., Daniel L. W., Waite M. Evidence of protein kinase C involvement in phorbol diester-stimulated arachidonic acid release and prostaglandin synthesis. J Biol Chem. 1987 Apr 15;262(11):5385–5393. [PubMed] [Google Scholar]
- Pash J. M., Bailey J. M. Inhibition by corticosteroids of epidermal growth factor-induced recovery of cyclooxygenase after aspirin inactivation. FASEB J. 1988 Jul;2(10):2613–2618. doi: 10.1096/fasebj.2.10.2968288. [DOI] [PubMed] [Google Scholar]
- Raz A., Wyche A., Siegel N., Needleman P. Regulation of fibroblast cyclooxygenase synthesis by interleukin-1. J Biol Chem. 1988 Feb 25;263(6):3022–3028. [PubMed] [Google Scholar]
- Russo-Marie F., Duval D. Dexamethasone-induced inhibition of prostaglandin production dose not result from a direct action on phospholipase activities but is mediated through a steroid-inducible factor. Biochim Biophys Acta. 1982 Jul 20;712(1):177–185. doi: 10.1016/0005-2760(82)90100-x. [DOI] [PubMed] [Google Scholar]
- Whiteley P. J., Needleman P. Mechanism of enhanced fibroblast arachidonic acid metabolism by mononuclear cell factor. J Clin Invest. 1984 Dec;74(6):2249–2253. doi: 10.1172/JCI111651. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Wood J. N., Coote P. R., Rhodes J. Hydrocortisone inhibits prostaglandin production but not arachidonic acid release from cultured macrophages. FEBS Lett. 1984 Aug 20;174(1):143–146. doi: 10.1016/0014-5793(84)81093-5. [DOI] [PubMed] [Google Scholar]
- Zucali J. R., Dinarello C. A., Oblon D. J., Gross M. A., Anderson L., Weiner R. S. Interleukin 1 stimulates fibroblasts to produce granulocyte-macrophage colony-stimulating activity and prostaglandin E2. J Clin Invest. 1986 Jun;77(6):1857–1863. doi: 10.1172/JCI112512. [DOI] [PMC free article] [PubMed] [Google Scholar]