title: Immunophenotype of peripheral T lymphocytes, NK cells and expression of CD69 activation marker in patients with recurrent spontaneous abortions, during the mid-luteal phase.
abstract: OBJECTIVE
  Determination of subpopulations of T lymphocytes, natural killer (NK) and activation status, in peripheral blood during the mid-luteal phase from patients with unexplained recurrent spontaneous abortion (RSA).
  
  
  METHODS
  Peripheral blood samples from non-pregnant women with RSA and normal multiparous were taken and evaluated for subpopulations of T lymphocytes: CD4, CD8, ('naive-like' and 'memory-like'), TCR receptor (alphabeta and gammadelta), activation status by CD69(+surface or intracellular)/CD3(+), and NK cells (CD16(+)/CD56(dim)/CD3(-), CD16(+)/CD56 (bright)/CD3(-), CD69(+surface or intracellular)/CD56(+)/CD3(-) cells).
  
  
  RESULTS
  The evaluation of T lymphocytes only showed an increase in the expression of CD69 (surface and intracellular) in the RSA group. Additionally, we observed an increase in the total NK cells, CD56(+) NK cells percentages, CD56(dim) NK cells and CD69 NK cells in RSA group.
  
  
  CONCLUSIONS
  These observations support the concept that immunological activation of T lymphocytes and NK cells could be involved in peripheral blood during the mid-luteal phase in patients with unexplained RSA.
authors.affiliation: Laboratorio de citometría de flujo del Banco Municipal de Sangre, Caracas, Venezuela.
authors.forename: Aramilena
authors.initials: A
authors.lastname: Prado-Drayer
authors.forename: José
authors.initials: J
authors.lastname: Teppa
authors.forename: Pedro
authors.initials: P
authors.lastname: Sánchez
authors.forename: María Isabel
authors.initials: MI
authors.lastname: Camejo
mesh_terms: D000026:Abortion, Habitual / Q000276:immunology*; D015703:Antigens, CD / Q000096:biosynthesis*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000096:biosynthesis*; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000276:immunology*; D037181:Lectins, C-Type; D008213:Lymphocyte Activation / Q000276:immunology; D016131:Lymphocyte Subsets / Q000276:immunology*; D011247:Pregnancy; D013601:T-Lymphocytes / Q000276:immunology*; D000099192:CD69 Antigens
chemical_list: D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D037181:Lectins, C-Type; D000099192:CD69 Antigens