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Recent topics on α-fetoprotein.

Kazuhiko Nakao¹, Tatsuki Ichikawa

¹Department of Gastroenterology and Hepatology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.

Hepatology Research : the Official Journal of the Japan Society of Hepatology

|January 26, 2013

Summary

Zinc-fingers and homeoboxes 2 (ZHX2) and ZBTB20 suppress alpha-fetoprotein (AFP) expression. Elevated AFP is a risk factor for hepatocellular carcinoma (HCC) and predicts treatment outcomes.

Keywords:

chronic hepatitis C hepatocellular carcinoma highly sensitive Lens culinaris agglutinin-reactive α-fetoprotein liver transplantation sorafenib α-fetoprotein

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Area of Science:

Molecular Biology
Hepatology
Oncology

Background:

Zinc-fingers and homeoboxes 2 (ZHX2) and ZBTB20 repress postnatal alpha-fetoprotein (AFP) expression by binding to its promoter.
ZHX2 inhibits AFP, cyclin A, and cyclin E expression, while CUX1 negatively regulates ZBTB20, linking AFP reactivation to hepatocyte proliferation.

Purpose of the Study:

To investigate the role of ZHX2 and ZBTB20 in AFP regulation.
To explore the clinical significance of AFP levels in chronic hepatitis C and hepatocellular carcinoma (HCC).

Main Methods:

Analysis of gene expression regulation by ZHX2 and ZBTB20.
Review of clinical data correlating AFP levels with HCC development and treatment outcomes.

Main Results:

ZHX2 and ZBTB20 interact with AFP gene promoter regions, repressing AFP expression.
Elevated serum AFP in chronic hepatitis C, even without HCC, is an independent HCC risk factor.
Sustained AFP elevation post-interferon therapy and AFP response to sorafenib are significant prognostic indicators for HCC patients.
Lens culinaris agglutinin-reactive AFP (AFP-L3) aids early HCC detection in specific patient groups.

Conclusions:

ZHX2 and ZBTB20 play a crucial role in suppressing AFP expression postnatally.
AFP levels serve as a valuable biomarker for HCC risk assessment, prognosis, and treatment monitoring.
AFP-L3 offers enhanced sensitivity for early HCC detection.