Contribution of hepatic parenchymal and nonparenchymal cells to hepatic fibrogenesis in biliary atresia

Ramm, G. A., Nair, V. G., Bridle, K. R., Shepherd, R. W. and Crawford, D. H. G. (1998) Contribution of hepatic parenchymal and nonparenchymal cells to hepatic fibrogenesis in biliary atresia. American Journal of Pathology, 153 2: 527-535. doi:10.1016/S0002-9440(10)65595-2


Author Ramm, G. A.
Nair, V. G.
Bridle, K. R.
Shepherd, R. W.
Crawford, D. H. G.
Title Contribution of hepatic parenchymal and nonparenchymal cells to hepatic fibrogenesis in biliary atresia
Journal name American Journal of Pathology   Check publisher's open access policy
ISSN 0002-9440
Publication date 1998-08
Sub-type Article (original research)
DOI 10.1016/S0002-9440(10)65595-2
Volume 153
Issue 2
Start page 527
End page 535
Total pages 9
Place of publication New York, NY, United States
Publisher Elsevier
Language eng
Formatted abstract
Extrahepatic biliary atresia is a severe neonatal liver disease resulting from a sclerosing cholangiopathy of unknown etiology. Although biliary obstruction may be surgically corrected by a 'Kasai' hepatoportoenterostomy, most patients still develop progressive hepatic fibrosis, although the source of increased collagen deposition is unclear. This study examined the role of hepatic stellate cells (HSCs) and assessed the source of transforming growth factor-β (TGF-β) production in hepatic fibrogenesis in patients with biliary atresia. Liver biopsies from 18 biliary atresia patients (including 5 pre- and post-Kasai) were subjected to immunohistochemistry for α-smooth muscle actin and in situ hybridization for either pro-collagen α1 (I) mRNA or TGF-β1 mRNA. Sections were also subjected to immunohistochemistry for active TGF-β1 protein. The role of Kupffer cells in TGF-β1 production was assessed by immunohistochemistry for CD68. Procollagen α1 (I) mRNA was colocalized to α-smooth muscle actin- positive HSCs within the region of increased collagen protein deposition in fibrotic septa and surrounding hyperplastic bile ducts. The number of activated HSCs was decreased in only one post-Kasai biopsy. TGF-β1 mRNA expression was demonstrated in bile duct epithelial cells and activated HSCs and in hepatocytes in close proximity to fibrotic septa. Active TGF-β1 protein was demonstrated in bile duct epithelial cells and activated HSCs. This study provides evidence that activated HSCs are responsible for increased collagen production in patients with biliary atresia and therefore play a definitive role in the fibrogenic process. We have also shown that bile duct epithelial cells, HSCs, and hepatocytes are all involved in the production of the pro-fibrogenic cytokine, TGF-β1.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Medicine Publications
 
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Created: Wed, 09 Mar 2011, 15:50:11 EST