Lack of involvement of lipocortin 1 in dexamethasone suppression of IL-1 release

E. F. Morand, D. Rickard, N. J. Goulding

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4 Citations (Scopus)


THE annexin lipocortin 1 is reported to mediate some anti-inflammatory effects of glucocorticoids, but the mechanisms of this mediation are incompletely understood. The involvement of lipocortin 1 in glucocorticoid inhibition of monocyte interleukin 1β (IL-1β) release has been investigated. Treatment of peripheral blood monocytes with 2 μg/ml lipopolysaccharide potently increased IL-1β release (p = 0.001) and dexamethasone (10 -7 M) significantly reduced both resting and stimulated IL-1β release (p = 0.009). A neutralizing monoclonal antibody to lipocortin 1 (0.5–50.0 μg/ml) was unable to inhibit this effect and recombinant lipocortin I (2 × 10 -6 M) and 188aa lipocortin 1 fragment (10-8–10-6 M) had no effect. It is concluded that lipocortin 1 is not involved in the inhibition of monocyte IL-1β release by glucocorticoids.

Original languageEnglish
Pages (from-to)49-52
Number of pages4
JournalMediators of Inflammation
Issue number1
Publication statusPublished - 1 Jan 1993
Externally publishedYes


  • Glucocorticoid
  • Interleukin 1
  • Lipocortin(annexin 1)
  • Monocyte

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