Abstract
In order to study the involvement of human chromosomes in the expression of liver-specific functions, we have produced somatic cell hybrids between a rat hepatoma (7777) cell line and human diploid skin fibroblasts (series XIX) or human fetal liver cells (series XXII). Production of human serum proteins was detected by immunoelectrophoretic analyses of concentrated serum-free hybrid culture supernatants. Human α1-antitrypsin (AAT) was secreted by a subset of hybrids but not by the parental cells. The activated human AAT phenotype segregated concordantly with human chromosome 14 in 18 primarily HAT-selected and five azaguanine back-selected series XXII hybrids. All other chromosomes were excluded as playing a role in AAT expression. Therefore, the AAT gene PI is assigned to chromosome 14. This quasi-constitutive expression of a liver-specific function was not observed for the other serum proteins studied, nor was it seen in the skin fibroblast-derived hybrids (series XIX) although AAT was produced by some of them.
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Pearson, S.J., Tetri, P., George, D.L. et al. Activation of humanα 1-antitrypsin gene in rat hepatoma × human fetal liver cell hybrids depends on presence of human chromosome 14. Somat Cell Mol Genet 9, 567–592 (1983). https://doi.org/10.1007/BF01574259
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DOI: https://doi.org/10.1007/BF01574259