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Expression of transforming growth factor-β1 and connective tissue growth factor in congenital biliary atresia and

F B Li1, H Zhao1, K R Peng1

  • 1Department of Gastroenterology, Children's Hospital of Zhejiang University, Hangzhou, China.

Genetics and Molecular Research : GMR
|February 25, 2016
PubMed

Insights

Transforming growth factor-β1 (TGF-β1) and connective tissue growth factor (CTGF) expression increases with liver fibrosis in infants. Early expression in biliary cells may contribute to congenital biliary atresia.

Area of Science:

  • Pediatric Hepatology
  • Gastroenterology
  • Fibrosis Research

Background:

  • Congenital biliary atresia and neonatal hepatitis are leading causes of cholestasis in infants.
  • Liver fibrosis is a common complication in both conditions, impacting long-term outcomes.
  • Understanding the molecular mechanisms driving fibrosis is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the expression of TGF-β1 and CTGF in infant liver tissues.
  • To determine the relationship between TGF-β1 and CTGF expression and the degree of liver fibrosis.
  • To explore the potential role of these growth factors in the pathogenesis of congenital biliary atresia.

Main Methods:

  • Comparative analysis of liver tissue from 36 infants with cholestasis, divided into congenital biliary atresia and neonatal hepatitis groups.
  • Histopathological assessment of liver fibrosis using H&E and Masson's trichrome staining.
  • Immunohistochemical evaluation of TGF-β1 and CTGF expression levels and localization.

Main Results:

  • Liver fibrosis was significantly more advanced in congenital biliary atresia compared to neonatal hepatitis (P < 0.01).
  • TGF-β1 and CTGF expression was significantly higher in congenital biliary atresia patients, localized to hepatocytes and biliary epithelial cells, versus mainly hepatocytes in neonatal hepatitis (P < 0.01).
  • Expression levels of both TGF-β1 and CTGF correlated positively and significantly with the severity of liver fibrosis (P < 0.01).

Conclusions:

  • Liver fibrosis is a significant finding in both congenital biliary atresia and neonatal hepatitis.
  • Increased TGF-β1 and CTGF expression is strongly associated with liver fibrosis progression in infants.
  • Early expression of TGF-β1 and CTGF in biliary epithelial cells suggests a potential role in the pathogenesis of congenital biliary atresia.

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