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. 1997 Oct;151(4):905–909.

Bile ductular damage induced by methylene dianiline inhibits oval cell activation.

B E Petersen 1, V F Zajac 1, G K Michalopoulos 1
PMCID: PMC1858051  PMID: 9327722

Abstract

Administration of 2-acetylaminofluorene (2-AAF) given before a two-thirds partial hepatectomy (PHx), results in suppression of hepatocyte proliferation and stimulation of oval cell proliferation. Our objective in this study was to examine the oval cell response and associated alpha-fetoprotein (AFP) gene expression by combining 2-AAF with selective hepatic damage caused by either carbon tetrachloride (CCl4) exposure or by PHx. We also examined oval cell response with the above two protocols (2-AAF/CCl4 and 2-AAF/PHx) as affected by previous bile ductular damage caused by 4,4'-methylene dianiline (4,4'-diaminodiphenylmethane, DAPM) exposure. DAPM is an aromatic diamine, known to cause bile ductular damage in both humans and animals. Using the protocols of 2-AAF/ CCl4 and 2-AAF/PHx, when DAPM was given 24 hours before the hepatic injury, no oval cell proliferation was seen (histological) and AFP expression was not detected by Northern blot analysis. These results provide direct evidence that oval cells are closely associated with the biliary epithelial cells and supports the theory that hepatic oval cells may originate from cells derived from either intraportal or periportal ductules.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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