complementary roles of β-catenin and glutamine synthetase immunostaining in diagnosis of chemotherapy-treated and untreated hepatoblastoma

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2017
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Abstract
This study aimed to evaluate the expression of β-catenin and its downstream target glutamine synthetase (GS) in hepatoblastoma (HB), and to evaluate the use of these two markers for diagnosing HB. Methods: Eighteen untreated HBs and 22 HBs resected after neoadjuvant chemotherapy were analyzed using β-catenin and GS immunostaining. Results: We detected nuclear β-catenin immunostaining in nearly all untreated HBs, including in fetal and embryonal epithelial components and in mesenchymal elements. We also observed diffuse GS expression in the epithelial component; however, it was frequently absent in embryonal and mesenchymal areas. In HBs resected after neoadjuvant chemotherapy, we recognized four histological patterns: fetal, hepatocellular-carcinoma-like, clear-cell, and normal-liver-like. All these patterns displayed diffuse GS expression. Fetal pattern showed diffuse nuclear β-catenin immunostaining. Nuclear β-catenin immunostaining was weak in the hepatocellular-carcinoma-like and clear-cell patterns. In normal-liver-like area, β-catenin expression was only located in the cell membrane. Conclusion: The results suggest that nuclear β-catenin expression and diffuse GS immunostaining are the hallmarks of HB. Although epithelial and mesenchymal components of HB display nuclear β-catenin staining, this expression is attenuated following chemotherapy-induced cell maturation. GS immunostaining is especially useful for the assessment of section margins after neoadjuvant chemotherapy.
Reference Key
huang2017journalcomplementary Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Wei-Ju Huang;Jia-Huei Tsai;Yung-Ming Jeng
Journal Bioorganic & medicinal chemistry letters
Year 2017
DOI
10.1016/j.jfma.2016.09.013
URL
http://www.sciencedirect.com/science/article/pii/S0929664616302558
Keywords
glutamine synthetase β-catenin hepatoblastomamedicine (general)

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