期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 24, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/ijms24010331
关键词
endometriosis; natural killer cells (NK cells); NK receptors; endometrioma; ectopic endometrium; immune dysfunction; NK inhibition; NK suppression
Endometriosis is a chronic inflammatory disorder characterized by the presence of endometrial cells outside the uterus. Studies indicate a correlation between the immune system, particularly NK receptors (NKR), and endometriosis, suggesting their essential role in the disease's pathogenesis.
Endometriosis is a chronic inflammatory disorder, characterized by the presence of endometrial cells outside the uterine cavity. An increasing number of studies correlate the immune system with endometriosis, particularly NK receptors (NKR), which have been suggested to play an essential role in the pathogenesis of the disease. This systematic review aims to enlighten the role of NKR in endometriosis. A literature search was performed independently by two reviewers, to identify studies assessing the role of NKR in endometriosis. In total, 18 studies were included. Endometriosis pathogenesis seems to be marked by the overexpression of NK inhibitor receptors (KIRS), namely, CD158a+, KIR2DL1, CD94/NKG2A, PD-1, NKB1, and EB6, and inhibiting ligands such as PD-L1, HLA-E, HLA-G, and HLA-I. Concurrently, there is a decrease in NK-activating receptors and natural cytotoxicity receptors (NCRs), such as NKp46, NKp30, and NKG2D. The immune shift from NK surveillance to NK suppression is also apparent in the greater relative number of ITIM domains compared with ITAM domains in NKRs. In conclusion, NK receptor activity seems to dictate the immunocompetency of women to clear endometriotic cells from the peritoneal cavity. Future research could explore NKRs as therapeutic targets, such as that which is now well established in cancer therapy through immunotherapy.
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