Menstrual- and gender-dependent variations in circulating IL-1 agonists, antagonists, and binding proteins

Joseph G. Cannon, Leslie W. Abad, Edouard Vannier, Elizabeth A. Lynch

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This study tested the hypotheses that sex-related differences in circulating binding proteins for interleukin-1β (IL-1β) exist and that these binding proteins affect immunoassays for IL-1β and IL-1Ra. 125I- labeled IL-1β was added to human plasma samples, then chromatographed. The percentages of total radioactivity eluting in a high-molecular-weight peak were 21.0 + 0.8 for men (n = 6), 19.1 ± 0.9 for follicular phase women (n = 6), and 18.0 ± 0.8 in luteal phase women (n = 6; men vs. women, P = 0.032; follicular vs. luteal, P = 0.035), and correlated with plasma sIL-1RII concentrations (r = 0.647, P = 0.007). Plasma IL-1β immunoreactivity did not correspond to concurrent cellular secretion rates due, in part, to interference in the IL-1β assay by sIL-1RII. Correspondence between plasma IL-1Ra levels and cellular secretion rates was observed only after serial dilutions of the samples. These results indicate that plasma IL-1β binding capacity differs between men and women and that sIL-1RII is a major contributing factor. Furthermore, relating plasma IL-1 isoform immunoreactivity to functional measures (tracer binding) or concurrent release by isolated cells can lead to insights about assay interferences that may exist in plasma.

Original languageEnglish (US)
Pages (from-to)117-123
Number of pages7
JournalJournal of Leukocyte Biology
Volume63
Issue number1
DOIs
StatePublished - Jan 1 1998

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Interleukin-1
Carrier Proteins
Interleukin 1 Receptor Antagonist Protein
Follicular Phase
Luteal Phase
Corpus Luteum
Immunoassay
Sex Characteristics
Radioactivity
Protein Isoforms
Molecular Weight

Keywords

  • Assay validation
  • Soluble receptors
  • α2-macroglobulin

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Cell Biology

Cite this

Menstrual- and gender-dependent variations in circulating IL-1 agonists, antagonists, and binding proteins. / Cannon, Joseph G.; Abad, Leslie W.; Vannier, Edouard; Lynch, Elizabeth A.

In: Journal of Leukocyte Biology, Vol. 63, No. 1, 01.01.1998, p. 117-123.

Research output: Contribution to journalArticle

Cannon, Joseph G. ; Abad, Leslie W. ; Vannier, Edouard ; Lynch, Elizabeth A. / Menstrual- and gender-dependent variations in circulating IL-1 agonists, antagonists, and binding proteins. In: Journal of Leukocyte Biology. 1998 ; Vol. 63, No. 1. pp. 117-123.
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