Correlation between decreased type-II interleukin-1 receptor and increased monocyte chemotactic protein-1 expression in the endometrium of women with endometriosis

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Decreased expression of IL-1 receptor type II correlates with increased monocyte chemotactic protein-1 in the endometrium of women with endometriosis, particularly in early stages and across the menstrual cycle.

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Abstract

PROBLEM: Monocyte chemotactic protein-1 (MCP-1), a potent inducer of macrophage recruitment and activation, is overexpressed in the eutopic endometrium of women with endometriosis. Eutopic endometrial cells of women with endometriosis secrete higher levels of MCP-1 than those of normal women, following stimulation with interleukin-1 (IL-1). The aim of this study was to examine whether there is any correlation between the expression of IL-1 receptor type II (IL-IRII), a specific downregulator of IL-1 activity, and that of MCP-1 in the eutopic endometrium of women with endometriosis. METHOD OF STUDY: Endometrial biopsies of 46 women with endometriosis and 22 healthy women were evaluated simultaneously for IL-1RII and MCP-1 expression by immunohistochemistry. RESULTS: Our study revealed a highly significant correlation between the decreased expression of IL-1RII and the increased expression of MCP-1 in the endometrial tissue of women with endometriosis (Spearman correlation coefficient r = -0.377, P = 0.002), particularly in the initial stages of the disease (stages I and II; r = - 0.368, P = 0.020 and r = -0.480, P = 0.002, respectively). Furthermore, this correlation was observed in the proliferative (r = -0.366, P = 0.047) and the secretory phases (r = -0.321, P = 0.049) of the menstrual cycle. CONCLUSIONS: These results suggest that the reduced capability of endometrial tissue to downregulate IL-1 proinflammatory effects may be involved in the increased expression of MCP-1 in the endometrium of women with endometriosis and the establishment of an inflammatory state. The results also indicate a sustained process of cell activation throughout the menstrual cycle.

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Condition tags

endometriosis

MeSH descriptors

Chemokine CCL2 Endometriosis Endometrium Interleukin-1 Receptors, Interleukin-1 Adult Adult Chemokine CCL2 Chemokine CCL2 Down-Regulation Down-Regulation Endometriosis Endometriosis Endometrium Endometrium Female Female Humans Humans Immunohistochemistry

Citation neighborhood

Papers in the corpus that this work cites (lower rings, blue) and that cite this one (upper rings, green). Dot size scales with the paper's in-corpus citation count — bigger dot = more influential within the endo/adeno field. Click a dot to open that paper. [ expand to 2 hops ] — adds papers reached through this work's immediate citers/citees. Heavier; up to 60 extra dots.

Cited by (15)

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europepmc
last seen: 2026-10-11T06:14:19.339412+00:00
openalex
last seen: 2026-06-10T17:14:06.276822+00:00
pubmed
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unpaywall
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