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. 1983 Jun;3(6):1013–1020. doi: 10.1128/mcb.3.6.1013

Temperature-sensitive adult liver cell line dependent on glucocorticoid for differentiation.

J Y Chou
PMCID: PMC368630  PMID: 6877237

Abstract

A clonal rat adult hepatocyte cell line (RALA255-10G) was shown to be temperature sensitive (ts) for growth and differentiation. Glucocorticoid was necessary to maintain the maximal levels of differentiated functions in these cells. The RALA255-10G cell line was established by transforming primary adult hepatocytes with simian virus 40 tsA255 virus that is temperature sensitive for maintenance of transformation. At the permissive temperature (33 degrees C), RALA255-10G cells showed characteristics of malignant transformation, synthesized low levels of albumin and transferrin, and contained low levels of functional receptors for glucagon. At the nonpermissive temperature (40 degrees C), these cells regain the normal differentiated phenotype, and the levels of these three hepatic functions were increased. Induction of albumin and transferrin production by RALA255-10G cells at 40 degrees C was shown to be the result of the increase in the biosynthesis of these proteins. Furthermore, the albumin and transferrin produced by these cells were immunologically and electrophoretically indistinguishable from authentic rat albumin and transferrin. Glucocorticoid, which reduced the growth rate and saturation density of RALA255-10G cells at 33 degrees C, was absolutely required by these cells to synthesize albumin at both temperatures. This hormone also enhanced transferrin production and glucagon response. Our data indicate that glucocorticoid hormone is one of the factors that maintain adult hepatocytes in a differentiated state.

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Selected References

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