3 Endometriosis: The host response

C M Grosskinsky, Grosskinsky CM, Halme J, J Halme, Jouko Halme
Bailliere's clinical obstetrics and gynaecology · 1993 · vol. 7(4) , pp. 701–713 · doi:10.1016/s0950-3552(05)80459-6 · PMID:8131311 · W2068441309
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This paper explores the host's immune response in endometriosis, investigating cellular and molecular mechanisms contributing to the disease.

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Abstract

There is abundant evidence of altered immune function in endometriosis. The task that remains is to attempt a synthesis from the accumulated data, to try to make some sense of the observed phenomena and to fit them into a conceptual framework; this might permit the formulation and testing of hypotheses. Evidently, eutopic endometrium does not engender an immune response in normal subjects, otherwise the endometrium would be subject to autoimmune destruction. It has also been established that the overwhelming majority of women regurgitate menstrual debris into the peritoneal cavity. Why does this lead to endometriosis in some, but not in others? There are several possible explanations. The uterus might act as a privileged site, i.e. be exempt from immune effector mechanisms. This would certainly be conducive to the reproductive goal, the survival of the fetal allograft. Endometrium would then not enjoy the immunologic tolerance of most other tissues, and upon leaving the uterus and entering an immunocompetent environment would be subject to immune attack. In normal subjects, this could consist of elimination of menstrual debris without further sequelae. An altered response, characterized by the production of antibody that could mask receptors for cytotoxic or phagocytic effector cells, would permit persistence of ectopic endometrium. The alternative to this hypothesis is that the uterus is not a privileged site, and that the organism is normally tolerant to endometrial antigens. Menstrual debris would be eliminated intraperitoneally without loss of tolerance due to the presence of homeostatic mechanisms including suppressor T cells and suppressive cytokines. In endometriosis, this tolerance breaks down, as is the case in several autoimmune disorders, causing a chronic inflammatory response with the release of toxic factors and, eventually, peritoneal scarring. Finally, the role of cell adhesion molecules, including the integrins, is only just being explored. The behaviour of these molecules in ectopic endometrium differs from that in eutopic endometrium, and it remains to be seen whether regurgitated endometrial debris from normal subjects is different from that of endometriosis sufferers. It seems that this will be an area of intense investigation in the immediate future.

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Condition tags

endometriosis

MeSH descriptors

Autoimmune Diseases Endometriosis Autoimmune Diseases Autoimmune Diseases Autoimmune Diseases Autoimmune Diseases Endometriosis Endometriosis Endometriosis Endometriosis Female Humans Immune Tolerance Infertility, Female Infertility, Female Inflammation Integrins Integrins Menstruation Disturbances Menstruation Disturbances

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Cited by (21)

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