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- W2092128500 abstract "Changes in the substratum anchorage of cells and nuclei were examined during methotrexate (MTX)-induced cytodifferentiation of BeWo human choriocarcinoma cells. During this process cytotrophoblast-like cells (CTLs) transform into giant mono- and multinucleated syncytiotrophoblast-like cells (STLs). Cells treated with MTX for 24 h exhibited significantly faster rates of substratum detachment by EDTA, trypsin-EDTA, EDTA-glycine, and DMSO than did uninduced controls. The decrease in cell-substratum adhesiveness occurred prior to the onset of morphological transformation. By 48 h, when morphological transformation was first observed, there had occurred a marked change in nuclear-cytoskeletal anchorage to the substratum, as evidenced by a difference in sensitivity of Triton-extracted STL and CTL monolayers to detachment by KI. STL monolayers were completely detached within 5 min of exposure to 0.3 M KI, while CTL monolayers remained firmly attached to the substratum for at least 3 h. KI-extracted residues were examined by electron microscopy and found to consist of nuclear shells attached to intermediate filaments. When cytoskeletal residues and KI-extracted proteins of STL and CTL cells were compared by two-dimensional polyacrylamide gel electrophoresis (PAGE), qualitative and quantitative differences were seen in a number of minor components. Thus the sensitivity of STL nuclear-cytoskeletal monolayers to removal by KI, an effective actin depolymerizing agent, may involve changes in the organization, stability, or interactions of actin with other components of the cytoskeletal framework." @default.
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- W2092128500 date "1984-10-01" @default.
- W2092128500 modified "2023-09-27" @default.
- W2092128500 title "Changes in cell-substratum adhesion and nuclear-cytoskeletal anchorage during cytodifferentiation of BeWo choriocarcinoma cells" @default.
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- W2092128500 doi "https://doi.org/10.1016/0014-4827(84)90162-9" @default.
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