Simplified assay for the quantification of 2,3-dinor-6-keto-prostaglandin F1 alpha by gas chromatography-mass spectrometry

J Chromatogr B Biomed Appl. 1994 Mar 4;653(2):117-22. doi: 10.1016/0378-4347(93)e0432-p.


Endogenous prostacyclin production is best assessed by the measurement of its excreted metabolites, of which a major one is 2,3-dinor-6-ketoprostaglandin F1 alpha (2,3-dinor-6-keto-PGF1 alpha). Gas chromatographic-mass spectrometric (GC-MS) assays have been developed for this compound but are cumbersome and time-consuming. We now report a modified assay for the measurement of 2,3-dinor-6-keto-PGF1 alpha employing GC-MS in which sample preparation time is markedly shortened by replacing a number of extraction steps with reversed-phase column extraction and by modifying derivatization procedures. Precision of the assay is +/- 5% and the accuracy is 98%. The lower limit of detection in urine is approximately 15 pg/mg creatinine. Normal urinary levels of this metabolite were found to be 141 +/- 54 pg/mg creatinine (mean +/- S.D.). Urinary excretion of 2,3-dinor-6-keto-PGF1 alpha is markedly altered in situations associated with abnormalities of prostacyclin generation when quantified using this assay. Thus, this assay provides a sensitive and accurate method to assess endogenous prostacyclin production and to further explore the role of this compound in human health and disease.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • 6-Ketoprostaglandin F1 alpha / analogs & derivatives*
  • 6-Ketoprostaglandin F1 alpha / urine
  • Epoprostenol / biosynthesis
  • Epoprostenol / metabolism
  • Gas Chromatography-Mass Spectrometry / methods*
  • Humans
  • Reference Values
  • Reproducibility of Results


  • 6-Ketoprostaglandin F1 alpha
  • 2,3-dinor-6-ketoprostaglandin F1alpha
  • Epoprostenol