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Updated: May 9, 2026

Determination of Fatty Acid Oxidation and Lipogenesis in Mouse Primary Hepatocytes
Published on: August 27, 2015
Aromatase in human liver and its diseases
Shuko Hata1, Yasuhiro Miki, Ryoko Saito
1Department of Pathology, Tohoku University Graduate School of Medicine 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
Carcinoma cells induce aromatase expression in nearby normal liver cells, a key factor in estrogen-dependent cancers. This study clarifies aromatase
Area of Science:
- Hepatology and Cancer Biology
- Endocrinology and Metabolism
Background:
- Estrogens are crucial for estrogen-dependent neoplasms.
- Aromatase is overexpressed in hepatitis and hepatocellular carcinoma (HCC), but its role in hepatic disorders is unclear.
Purpose of the Study:
- To investigate the intrahepatic status of aromatase in various liver conditions.
- To evaluate the impact of hepatocyte-carcinoma cell interactions on aromatase mRNA expression.
Main Methods:
- Immunohistochemistry was used to localize aromatase in liver tissues (cirrhosis, steatosis, hepatitis, HCC, MLC).
- HepG2 cells (hepatocyte model) were co-cultured with carcinoma cell lines to assess aromatase mRNA levels.
- Alternative splicing of aromatase exon 1 was analyzed.
Main Results:
- Aromatase immunoreactivity was primarily observed in nonneoplastic hepatocytes surrounding tumor cells.
- Co-culture with carcinoma cell lines significantly increased aromatase mRNA levels in HepG2 cells.
- Carcinoma cells, regardless of origin, induced aromatase expression in adjacent hepatocytes, likely via soluble factors.
Conclusions:
- Carcinoma cells stimulate aromatase expression in neighboring normal hepatocytes within the human hepatic microenvironment.
- This interaction may contribute to the progression of estrogen-dependent liver neoplasms.
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