Human Reproduction, Vol 12, 1307-1310, Copyright © 1997 by Oxford University Press
J McLaren, G Dealtry, A Prentice, DS Charnock-Jones and SK Smith
Endometriosis is characterized by an increase in the number, activation and
secretory activity of peritoneal fluid macrophages. Factors regulating the
activation of these cells may be important in the pathophysiology of this
disease. In this study we measured by enzyme- linked immunosorbent assay
the concentrations of the macrophage inhibitory factor interleukin (IL)-13
in the peritoneal fluid of women with and without endometriosis. It was
found that women with endometriosis had significantly lower amounts of
IL-13 (95 +/- 9.8 pg/ml) in peritoneal fluid, compared with women without
endometriosis (115 +/- 30 pg/ml) (P < 0.01). No cycle-specific variation
was evident for either group. Another macrophage inhibitory interleukin
(IL-10) was also measured, but no differences between women with (16.1 +/-
13.2 pg/ml) or without (10.3 +/- 5.6 pg/ml) endometriosis were seen. The
immunolocalization of IL-13 was assessed in eutopic and ectopic endometrium
and in isolated peritoneal fluid cells. Glandular epithelial cells and
stromal cells in both eutopic and ectopic endometrium were immunopositive
for IL-13. No cycle-specific differences in the immunolocalization of IL-13
were seen. In conclusion, the reduced amounts of IL-13 in the peritoneal
fluid of women with endometriosis may lead to a lack of suppression of
macrophage activation, thereby contributing to the overall pathogenesis of
this disease.
ARTICLES
Decreased levels of the potent regulator of monocyte/macrophage activation, interleukin-13, in the peritoneal fluid of patients with endometriosis
Department of Obstetrics and Gynaecology, University of Cambridge, Rosie Maternity Hospital, UK.
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