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Long-term culture of rat liver cell spheroids in hormonally defined media.

Abstract：

:Liver cells of new-born rats, which were found to be able to form spheroidal aggregates when cultured on a nonadherent plastic substratum, were studied under various conditions of culture, mainly by adding different nutrients and growth factors to the culture medium. Analysis of hepatocyte-specific functions was carried out by immunoprecipitation to detect specific proteins newly secreted by liver cell spheroids on different days of culture. When no supplement was added to culture medium, the secretion of albumin and transferrin by liver cell spheroids was no longer detectable after 2 weeks of culture. When dexamethasone, glucagon, insulin, and EGF were added to culture medium, the secretion of albumin and transferrin remained detectable at least until 60 days of culture. This was even more striking when trace elements were added in addition to the three hormones and EGF. The effects of addition of these various factors to culture medium were also detectable with respect to alpha-FP secretion. Even after 54 days of culture in total supplemented medium, these liver cell spheroids could be transferred on a collagen-coated plastic substratum to form a monolayer of uniform liver parenchyma-like cells. The presence of extracellular matrix-like material was observed on the surface of cell spheroids. This could be responsible for attachment and fusion between cell spheroids. Thus, liver cell spheroids cultured in total supplemented medium ensured cell attachment to a biological matrix and cell-cell contact, which is thought to help maintain cell differentiation. Liver cell spheroids offer the possibility of toxicological and pharmacological studies as well as cultures in biomatrix and coculture systems. In addition these liver cells can be used for experiments in liver cell transplantation.

journal_name

Exp Cell Res

journal_title

Experimental cell research

authors

Tong JZ,Bernard O,Alvarez F

doi

10.1016/0014-4827(90)90260-h

subject

Has Abstract

pub_date

1990-07-01 00:00:00

pages

87-92

issue

1

eissn

0014-4827

issn

1090-2422

pii

0014-4827(90)90260-H

journal_volume

189

pub_type

杂志文章

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