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Effects of Gonadotropin‐Releasing Hormone Agonist (GnRHa) and Ovariectomy on Leukocyte Subpopulations in Rats With Autotransplanted Endometrium
Author(s) -
Matsubayashi Hidehiko,
Iwasaki KenIchi,
Maruyama Tetsuo,
Ozawa Nobuaki,
Nemoto Taiko,
Iwasaki Shinya,
Sun WenShu,
Nakazawa Kazumi,
Nozawa Shiro,
Makino Tsunehisa
Publication year - 1996
Publication title -
american journal of reproductive immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 97
eISSN - 1600-0897
pISSN - 1046-7408
DOI - 10.1111/j.1600-0897.1996.tb00137.x
Subject(s) - endocrinology , medicine , gonadotropin releasing hormone agonist , endometrium , agonist , estrogen , hormone , immune system , flow cytometry , biology , gonadotropin releasing hormone , immunology , receptor , luteinizing hormone
PROBLEM: To determine the effect of estrogen deficiency on populations of immune cells in rats with autotransplanted endometrium. METHOD OF STUDY: Autologous endometrial segments were implanted in the peritoneum of rats. Leukocyte subsets in the peripheral blood (PB) and peritoneal fluid (PF) of autotransplanted rats treated with gonadotropin‐releasing hormone agonist (GnRHa) or ovariectomy were analyzed by flow cytometry. RESULTS: Endometrial growth was suppressed in association with increases in natural killer (NK) cells and macrophages in rats treated surgically or medically after endometrial implantation compared with autotransplanted‐only rats. Normal rats treated with GnRHa showed no significant alterations in PB and PF leukocyte subsets, even in NK cells and macrophages, compared with untreated normal rats. CONCLUSIONS: Data suggest that GnRHa itself did not have an immunomodulating effect when rats were treated for 3 weeks, but that a hypoestrogenic state reduced the size of the ectopic endometrium in association with increases in NK cells and macrophages. Our findings support the hypothesis that ectopic endometrial cells may release immunosuppressive factors.