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Hum. Reprod. Advance Access originally published online on June 24, 2004
Human Reproduction 2004 19(9):1974-1978; doi:10.1093/humrep/deh372
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Human Reproduction vol. 19 no. 9 © European Society of Human Reproduction and Embryology 2004; all rights reserved

Decreased expression of killer cell inhibitory receptors on natural killer cells in eutopic endometrium in women with adenomyosis

Jehn-Hsiahn Yang1, Mei-Jou Chen1, Hsin-Fu Chen1, Tsung-Hsien Lee1, Hong-Nerng Ho1,2,3 and Yu-Shih Yang1

1 Department of Obstetrics and Gynecology and 2 Department of Medical Research, College of Medicine and the Hospital, National Taiwan University, 7 Chung-Shan South Road, Taipei, Taiwan

3 To whom correspondence should be addressed. Email: hnho{at}ha.mc.ntu.edu.tw

BACKGROUND: Increased expression of killer cell inhibitory receptors (KIRs) has been found on natural killer (NK) cells in peritoneal fluid in women with endometriosis. In this study, we tried to measure the expression of KIRs on NK and T cells in women with adenomyosis, in an attempt to find the possible role of KIRs in the development of adenomyosis. METHODS: A total of 10 women with adenomyosis (study group) and 12 women with uterine myoma (control group) were included in this study. The expression of KIRs, including NKB1, GL183, EB6 and CD94, on NK and T cells in myometrium and endometrium was examined by flow cytometry. RESULTS: There was a decreased expression of NKB1 and GL183 on NK cells in the endometrium, but not in the myometrium, in women with adenomyosis. However, the expression of KIRs on T cells, either CD4+ or CD8+, was not different in either myometrium or endometrium between women with and without adenomyosis. CONCLUSIONS: The expression of KIRs on NK cells was decreased in eutopic endometrium in women with adenomyosis. It may be a compensatory effect in which the NK cytotoxicity is activated in order to eradicate the abnormal endometrial cells that might exit of the eutopic site of the endometrium.

Key words: adenomyosis/endometrium/killer cell inhibitory receptor


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J.-H. Yang, M.-Y. Wu, C.-D. Chen, M.-J. Chen, Y.-S. Yang, and H.-N. Ho
Altered apoptosis and proliferation in endometrial stromal cells of women with adenomyosis
Hum. Reprod., April 1, 2007; 22(4): 945 - 952.
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