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Kloehn, S.* ; Otte, C.* ; Korsanke, M.* ; Arendt, T.* ; Clemens, A.* ; Glasow, A.* ; Bornstein, S.R.* ; Fölsch, U.R.* ; Mönig, H.*

Expression and distribution of the prolactin receptor in normal rat liver and in experimental liver cirrhosis.

Horm. Metab. Res. 33, 394-401 (2001)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Recent results have suggested a role for prolactin (PRL) as a regeneration factor in the liver. In order to investigate the involvement of prolactin in the pathogenesis of liver cirrhosis, we studied the expression of the prolactin receptor (PRLR) and PRL during the development of cirrhosis in an animal model. 30 male rats were exposed to CCl4 by inhalation. Phenobarbitone was added to the drinking water to accelerate the formation of toxic metabolites by enzyme induction. Two control groups of 30 animals each were treated with phenobarbitone only or received no treatment. 10 animals of each group were sacrificed 35, 55, and 70 days after initiation of treatment. Liver tissue was subjected to histological examination, which demonstrated fibrosis of different grades and cirrhosis in the CCl4-treated rats. Expression of PRLR mRNA was investigated by mRNA extraction, RT-PCR and computer-supported densitometric evaluation. Compared to control liver, PRLR mRNA was expressed at a higher level in fibrotic and cirrhotic liver specimens. In normal tissue, immunohistochemical staining showed a high concentration of PRLR around the central vein and in the epithelium of the bile ducts. This pattern of distribution was lost in fibrosis and cirrhosis. An accumulation of PRLR was demonstrated within the damaged cells. Neither PRL nor PRL mRNA was detectable in normal, fibrotic, or cirrhotic liver. We conclude that PRLR is distributed in normal rat liver in a typical pattern which is lost with increasing fibrosis. PRL is not produced by rat liver, indicating that PRL does not act through autocrine or paracrine mechanisms.
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Publication type Article: Journal article
Document type Scientific Article
Language english
Publication Year 2001
HGF-reported in Year 0
ISSN (print) / ISBN 0018-5043
e-ISSN 1439-4286
Quellenangaben Volume: 33, Issue: 7, Pages: 394-401 Article Number: , Supplement: ,
Publisher Thieme
Reviewing status Peer reviewed
Institute(s) Institute of Pancreatic Islet Research (IPI)
PubMed ID 11507675
Erfassungsdatum 2001-12-31