Isolation of Prolactin-Producing Cells from First and Second Trimester Decidua*

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Abstract
Two cell types isolated and purified to homogeneity from human decidua obtained at 8–17 weeks of gestation were shown immunocytochemically to correspond to decidual and epithelial cells in the tissue of origin. The decidual cells reacted with antihuman PRL antiserum, and epithelial cells reacted with antiserum against keratin, an epithelial cell marker. Decidual and epithelial cells were cultured separately to determine their abilities to release PRL to the medium. Decidual cells released 140–410 ng PRL/mg protein in 24 h, whereas no PRL was detectable in cultures of isolated epithelial cells. These homogeneous preparations provide an excellent system with which to study the regulation of PRL production and other biochemical properties of decidual components.

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