title: In vitro modulation of activation antigens on human lymphocytes by beta-estradiol.
abstract: OBJECTIVE
  The possible in vitro immunomodulating effect of beta-estradiol on phytohemagglutinin-stimulated human lymphocyte cultures was studied.
  
  
  METHODS
  Lymphocyte cultures from 12 healthy men and women aged 25-35 years were set up for 12 hr in the presence and in the absence of beta-estradiol, and the expression of the activation markers CD25, CD69, and CD71 was examined by flow cytometric analysis with specific fluorescent conjugated antibodies.
  
  
  RESULTS
  Although the number of cases is small, in 10 of 12 cases in the presence of beta-estradiol in two different concentrations, a significantly decreased expression of CD69 could be observed. A slight decrease could also be observed for the Interleukin-2 receptor expression; however, the difference, in the presence or absence of beta-estradiol, was not significant.
  
  
  CONCLUSIONS
  The results suggest that in vitro addition of beta-estradiol can inhibit, to a certain degree, specific activation markers on phytohemagglutinin-stimulated lymphocytes from young men and women. The present study could not define the role of sex differences because of the small number of samples. A comparison between men and women at various ages in a greater number of cases, as well as studies on activation markers after treatments with estrogens, would be useful.
authors.affiliation: Research Institute for Human Reproduction, Rabin Medical Center, Petach Tiqva, Israel.
authors.forename: L
authors.initials: L
authors.lastname: Komlos
authors.forename: Z
authors.initials: Z
authors.lastname: Zahavi
authors.forename: D
authors.initials: D
authors.lastname: Dicker
authors.forename: D
authors.initials: D
authors.lastname: Luria
authors.forename: H
authors.initials: H
authors.lastname: Salman
authors.forename: I
authors.initials: I
authors.lastname: Zahavi
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000032:analysis*; D000944:Antigens, Differentiation, B-Lymphocyte / Q000032:analysis; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D037181:Lectins, C-Type; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000187:drug effects / Q000276:immunology*; D008297:Male; D010835:Phytohemagglutinins / Q000494:pharmacology; D015375:Receptors, Interleukin-2 / Q000032:analysis; D011990:Receptors, Transferrin; D000099192:CD69 Antigens
chemical_list: D015703:Antigens, CD; D000944:Antigens, Differentiation, B-Lymphocyte; D000945:Antigens, Differentiation, T-Lymphocyte; D004958:Estradiol; D037181:Lectins, C-Type; D010835:Phytohemagglutinins; D015375:Receptors, Interleukin-2; D011990:Receptors, Transferrin; D000099192:CD69 Antigens; C068126:CD71 antigen