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Lancet. 1981 Nov 7;2(8254):1003-5.

Immunogenicity of human amniotic epithelial cells after transplantation into volunteers.


Human amniotic epithelial cells do not express on their surfaces HLA-A, B, C, and DR antigens, or beta 2-microglobulin. In vitro these cells synthesise the enzymes lacking in patients with selected enzymatic deficiencies: the survival of a transplanted monolayer of human amniotic epithelial cells was therefore investigated in seven volunteers. None of the volunteers showed clinical signs of acute rejection, and amniotic epithelial cells were demonstrated by biopsy up to 7 weeks after implantation. HLA antibodies were not detected in samples of serum from four volunteers thoroughly investigated, and there was no in-vitro lymphocyte reaction to the amniotic cells in two of them. The results suggest that acute immune rejection does not occur after the transplantation of human amniotic epithelial cells.

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