In the present study, we describe a new method of isolation and culture of human villous and extravillous trophoblasts from term placenta. The cultivation of trypsinized placental villous tissue explants, followed by the isolation of cells from outgrowth islets allows for obtaining a cytotrophoblast subpopulation that is free from contamination by other cell types. Compared to other methods, our protocol is mild, simple and effective, does not request costly reagents and provides isolation of the mononuclear cytotrophoblast cell populations free from contamination by other types of placental cells. The isolated cells proliferated and formed a pleomorphic monolayer, where cells fused into a small number of binuclear or polynuclear syncytiotrophoblasts. Isolated cytotrophoblast cells expressed the specific epithelial intermediate filament cytokeratin 7 (CK7), the epithelium-specific cell-cell adhesion molecule E-cadherin and were CD9-, CD45- and vimentin-negative. Cyto- and syncytiotrophoblasts obtained by this method can be used as a model or tool for the fundamental research of differentiation and function of human placental cells, and can provide a new understanding of drug distribution in placenta. Their combination with other in vitro cell models can be useful for studying a variety of other aspects concerning placental functions, which will provide new knowledge for understanding immunology, endocrinology and development of placenta.

译文

在本研究中,我们描述了一种从足月胎盘中分离和培养人绒毛和绒毛外滋养细胞的新方法。胰蛋白酶化的胎盘绒毛组织外植体的培养,然后从生长胰岛中分离出细胞,可以获得不受其他细胞类型污染的细胞滋养层亚群。与其他方法相比,我们的方案温和,简单且有效,不需要昂贵的试剂,并且隔离单核细胞滋养层细胞群体,而不受其他类型胎盘细胞的污染。分离的细胞增殖并形成多形性单层,其中细胞融合成少量的双核或多核合体滋养层细胞。分离的细胞滋养层细胞表达特异性上皮中间丝细胞角蛋白7 (CK7),上皮特异性细胞-细胞粘附分子E-钙粘蛋白,并为CD9-,CD45-和波形蛋白阴性。通过该方法获得的细胞滋养细胞和合体滋养细胞可以作为人类胎盘细胞分化和功能基础研究的模型或工具,并可以为胎盘中药物的分布提供新的认识。它们与其他体外细胞模型的结合可用于研究有关胎盘功能的其他各种方面,这将为理解免疫学,内分泌学和胎盘发育提供新的知识。

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