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Term cytotrophoblast do not express polymorphic MHC Class I antigens, unlike other fetal and maternal cells in the amniochorion/decidua. This allows cytotrophoblast to be isolated and purified from this tissue, utilizing 4E, a monoclonal antibody specific for HLA-B, which labels only non-trophoblast. We have developed a method using enzymic dispersion and Percoll gradient centrifugation, followed by flow cytometry, that yields, on average, a total of 5 X 10(6) term extravillous cytotrophoblast, 97 per cent pure. The availability of highly purified extravillous cytotrophoblast, for the first time, permits precise investigation of trophoblast function.


Journal article



Publication Date





505 - 513


Antibodies, Monoclonal, Cell Separation, Centrifugation, Density Gradient, Female, Flow Cytometry, Humans, Immunohistochemistry, In Vitro Techniques, Placenta, Trophoblasts