Cancer and Metastasis Reviews

, Volume 13, Issue 3, pp 241–256

Regulation of prostaglandin synthase-1 and prostaglandin synthase-2

  • Harvey R. Herschman
  • Warren Hall

DOI: 10.1007/BF00666095

Cite this article as:
Herschman, H.R. & Hall, W. Cancer Metast Rev (1994) 13: 241. doi:10.1007/BF00666095


It has been assumed that the rate-limiting step in the ligand-induced synthesis of prostaglandins is the release of arachidonic acid from membrane phospholipid stores as a result of the activation of phospholipase. The assumption has been that the arachidonic acid is converted to PGH2 by the constitutive prostaglandin synthase/cyclooxygenase EC1.14.99.1 (PGS-1) enzyme present in cells. In this model, PGS-1 is proposed to be present in excess, and the production of arachidonic acid is thought to be rate limiting. However, a second prostaglandin synthase gene, PGS-2 has recently been described. The PGS-2 gene is induced by a variety of ligands, in cells as diverse as fibroblasts, monocytes, macrophages, smooth muscle cells, ovarian granulosa cells, epithelial cells, endothelial cells, and neurons. Moreover, PGS-2 induction is inhibited in nearly all contexts by glucocorticoids. It seems likely, therefore, that the regulation of PGS-2 expression plays a critical role in the production of prostanoids, both in normal physiological processes and in pathophysiological processes involving these paracrine mediators. In this review, we consider the regulation of the two genes, PGS-1 and PGS-2, that encode the isoforms of prostaglandin synthase.

Key words

prostaglandin prostaglandin synthase cyclooxygenase eicosanoids TIS10 

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Harvey R. Herschman
    • 1
  • Warren Hall
    • 2
  1. 1.Department of Biological Chemistry and Laboratory of Structural Biology and Molecular MedicineCenter for the Health Sciences, University of CaliforniaLos AngelesUSA
  2. 2.UCLALos AngelesUSA

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