title: Reactivity of lymphocytes to a progesterone receptor-specific monoclonal antibody.
abstract: In this study we present evidence for reactivity of pregnancy lymphocytes, but not nonpregnancy lymphocytes, with the progesterone receptor-specific monoclonal antibody mPRI. Using an avidin-biotin peroxidase detection system, we found a nuclear staining in 14.6 +/- 3.7% (mean +/- SEM, N = 27) of pregnancy lymphocytes, while only 0.47 +/- 0.33% (mean +/- SEM, N = 15) of nonpregnancy lymphocytes reacted with the antibody. To characterize the receptor-bearing subset, CD8+ and CD4+ cells were depleted by complement-dependent lysis. Depletion of CD8+ cells was accompanied by 62 +/- 18% loss of progesterone receptor-bearing cells, while depletion of CD4+ cells resulted in a twofold increase in the number of positively staining lymphocytes. In nonpregnancy lymphocytes a 3-day PHA treatment, as well as allogeneic stimulation, resulted in a significant increase in the number of receptor-containing cells. These results suggest that pregnancy, but not nonpregnancy, lymphocytes contain progesterone binding structures, and that these are inducible by mitogenic or alloantigenic stimuli.
authors.affiliation: Institute of Microbiology, University Medical School, Pécs, Hungary.
authors.forename: J
authors.initials: J
authors.lastname: Szekeres-Bartho
authors.forename: G
authors.initials: G
authors.lastname: Szekeres
authors.forename: P
authors.initials: P
authors.lastname: Debre
authors.forename: B
authors.initials: B
authors.lastname: Autran
authors.forename: G
authors.initials: G
authors.lastname: Chaouat
mesh_terms: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis; D015704:CD4 Antigens / Q000032:analysis; D016827:CD8 Antigens; D005260:Female; D006801:Humans; D008214:Lymphocytes / Q000032:analysis* / Q000276:immunology; D008297:Male; D010835:Phytohemagglutinins / Q000494:pharmacology; D011247:Pregnancy / Q000097:blood*; D011980:Receptors, Progesterone / Q000032:analysis* / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D015704:CD4 Antigens; D016827:CD8 Antigens; D010835:Phytohemagglutinins; D011980:Receptors, Progesterone