title: Increased expressions of CD69 and HLA-DR but not of CD25 or CD71 on endometrial T lymphocytes of nonpregnant women.
abstract: To investigate lymphocyte subpopulations and the status of T-cell activation at different phases of the menstrual cycle, lymphocytes in endometrial tissue were analyzed by dual-color flow cytometry in 39 patients. Compared with peripheral blood, the lymphocytes in the endometrium had a higher CD3-/(CD56+ or CD16+) ratio (25.2% +/- 6.8% vs 11.1% +/- 7.0%), but an inverted CD3+ CD8-/CD3+ CD8+ ratio (0.5 vs 1.8) and a minimal amount of B cells (3.3% +/- 3.1%). TcR gamma delta + T cells accounted for a minor proportion (7.8% +/- 5.1%) in endometrium. The proportions of TcR alpha beta + (85.0% +/- 6.6%) and CD3+ CD56+ (7.4% +/- 4.4%) endometrial T lymphocytes were found significantly different from those in peripheral blood (89.1% +/- 5.6% and 3.8% +/- 3.4%, respectively). As the endometrium proceeded from proliferative phase to luteal phase, the proportion of CD3+ CD8+ T cells in peripheral blood increased from 35.6% +/- 6.9% to 41.3% +/- 8.4% and CD3+ CD8- T cells decreased from 64.4% +/- 6.9% to 58.7% +/- 8.4%. The endometrial T cells expressed high levels of CD69 (84.1% +/- 18.9%) and DR (75.9% +/- 9.7%), but rarely expressed CD25 (7.0% +/- 5.4%) and CD71 (2.8% +/- 1.8%). The patterns of expression of these activation markers were similar in both proliferative and luteal phases. Our observations suggest that endometrial T lymphocytes are in a state of recent and persistent activation. Lymphocytes expressing the NK cell markers (CD56 or CD16) and CD8+ accounted for a significant proportion, suggesting that they may play important roles in local defense.
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine and Hospital, National Taiwan University, Taipei, Republic of China.
authors.forename: C K
authors.initials: CK
authors.lastname: Chen
authors.forename: S C
authors.initials: SC
authors.lastname: Huang
authors.forename: C L
authors.initials: CL
authors.lastname: Chen
authors.forename: M R
authors.initials: MR
authors.lastname: Yen
authors.forename: H C
authors.initials: HC
authors.lastname: Hsu
authors.forename: H N
authors.initials: HN
authors.lastname: Ho
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000096:biosynthesis*; D000944:Antigens, Differentiation, B-Lymphocyte / Q000096:biosynthesis; D000945:Antigens, Differentiation, T-Lymphocyte / Q000096:biosynthesis; D003338:Corpus Luteum / Q000276:immunology; D004717:Endometrium / Q000166:cytology / Q000276:immunology*; D005260:Female; D005434:Flow Cytometry; D006684:HLA-DR Antigens / Q000096:biosynthesis*; D006801:Humans; D037181:Lectins, C-Type; D008597:Menstrual Cycle / Q000276:immunology; D008875:Middle Aged; D011948:Receptors, Antigen, T-Cell / Q000096:biosynthesis*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000096:biosynthesis; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000096:biosynthesis; D015375:Receptors, Interleukin-2 / Q000096:biosynthesis; D011990:Receptors, Transferrin; D013601:T-Lymphocytes / Q000276:immunology*; D000099192:CD69 Antigens
chemical_list: D015703:Antigens, CD; D000944:Antigens, Differentiation, B-Lymphocyte; D000945:Antigens, Differentiation, T-Lymphocyte; D006684:HLA-DR Antigens; D037181:Lectins, C-Type; D011948:Receptors, Antigen, T-Cell; D016693:Receptors, Antigen, T-Cell, alpha-beta; D016692:Receptors, Antigen, T-Cell, gamma-delta; D015375:Receptors, Interleukin-2; D011990:Receptors, Transferrin; D000099192:CD69 Antigens; C068126:CD71 antigen