title: [The natural killer system in the human fetus].
abstract: Natural cytotoxic activity of cells from human fetal spleen, liver, bone marrow, appendix, tonsilar glands and thymus was investigated in 14-26-week-old embryos. The spleen and liver expressed powerful NK activity against K-562 target cells from a 22 week-old embryo. Thymocytes and cells from the appendix and tonsilar glands displayed but negligible cytotoxic activity.
mesh_terms: D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D005333:Fetus / Q000276:immunology*; D005865:Gestational Age; D006413:Hematopoietic System / Q000196:embryology / Q000276:immunology; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology*
vernacular_title: Sostoianie sistemy estestvennykh killerov u ploda cheloveka.