PMID- 7589633 OWN - NLM STAT- MEDLINE DCOM- 19951207 LR - 20190707 IS - 0015-0282 (Print) IS - 0015-0282 (Linking) VI - 64 IP - 5 DP - 1995 Nov TI - Role of major histocompatibility complex class I expression and natural killer-like T cells in the genetic control of endometriosis. PG - 909-16 AB - OBJECTIVE: To evaluate whether the expression of human leukocyte antigen (HLA) class I on eutopic and ectopic endometrial cells modify the susceptibility to lysis mediated by lymphocytes. DESIGN: Evaluation of T lymphocyte cytotoxic activity and HLA class I expression on endometrial cells. SETTING: Subjects were recruited at laparoscopy. PATIENTS: Patients with endometriosis (n = 7). Healthy women as controls (n = 10). MAIN OUTCOME MEASURES: Human leukocyte antigen class I molecule analysis of endometrial cells was carried out by immunofluorescence and flow cytometry. Phenotyping of T lymphocytes was performed to analyze T-cell subsets. Cytotoxicity was performed to determine cytolytic activity against endometrial cells. RESULTS: In vitro culture of endometrial cells down-regulates the expression of HLA class I molecules and enhances the susceptibility to lysis mediated by natural killer (NK)-like T lymphocytes. Cytolytic T-cell clones, expressing the CD94 antigen, are inhibited by the HLA-B7 allele on endometrial cells. Ectopic endometrial cells modulate the expression of HLA class I molecules. CONCLUSIONS: The resistance to lysis of endometrial cells is related to expression of surface HLA class I molecules, which send a negative signal for lysis mediated by NK-like T lymphocytes. The HLA-B7 allele inhibits the cytotoxic activity, suggesting that the growth of ectopic endometrial cells might be under a genetic control. FAU - Semino, C AU - Semino C AD - Servizio di Citometria, Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy. FAU - Semino, A AU - Semino A FAU - Pietra, G AU - Pietra G FAU - Mingari, M C AU - Mingari MC FAU - Barocci, S AU - Barocci S FAU - Venturini, P L AU - Venturini PL FAU - Ragni, N AU - Ragni N FAU - Melioli, G AU - Melioli G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Fertil Steril JT - Fertility and sterility JID - 0372772 RN - 0 (HLA-B7 Antigen) RN - 0 (Histocompatibility Antigens Class I) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Alleles MH - Cells, Cultured MH - Down-Regulation MH - Endometriosis/etiology/*genetics/*physiopathology MH - Endometrium/chemistry/metabolism/pathology MH - Female MH - Flow Cytometry MH - Fluorescent Antibody Technique, Indirect MH - Gene Expression Regulation MH - Genes, MHC Class I MH - HLA-B7 Antigen/analysis/genetics MH - Histocompatibility Antigens Class I/biosynthesis/genetics/*physiology MH - Humans MH - Interferon-gamma/pharmacology MH - Killer Cells, Natural/immunology/pathology/*physiology MH - Phenotype MH - T-Lymphocytes, Cytotoxic/pathology/physiology EDAT- 1995/11/01 00:00 MHDA- 1995/11/01 00:01 CRDT- 1995/11/01 00:00 PHST- 1995/11/01 00:00 [pubmed] PHST- 1995/11/01 00:01 [medline] PHST- 1995/11/01 00:00 [entrez] AID - S0015-0282(16)57901-1 [pii] AID - 10.1016/s0015-0282(16)57901-1 [doi] PST - ppublish SO - Fertil Steril. 1995 Nov;64(5):909-16. doi: 10.1016/s0015-0282(16)57901-1.