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1.  Microsomal Prostaglandin E Synthase-2 Is Not Essential For In Vivo Prostaglandin E2 Biosynthesis 
Prostaglandin E2 (PGE2) plays an important role in the normal physiology of many organ systems. Increased levels of this lipid mediator are associated with many disease states, and it potently regulates inflammatory responses. Three enzymes capable of in vitro synthesis of PGE2 from the cyclooxygenase metabolite PGH2 have been described. Here, we examine the contribution of one of these enzymes to PGE2 production, mPges-2, which encodes microsomal prostaglandin synthase-2 (mPGES-2), by generating mice homozygous for the null allele of this gene. Loss of mPges-2 expression did not result in a measurable decrease in PGE2 levels in any tissue or cell type examined from healthy mice. Taken together, analysis of the mPGES-2 deficient mouse lines does not substantiate the contention that mPGES-2 is a PGE2 synthase.
doi:10.1016/j.prostaglandins.2008.10.003
PMCID: PMC3182462  PMID: 19010439
Microsomal Prostaglandin E2 Synthase-2; Prostaglandin E2

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