Related Experiment Video

Updated: Jun 28, 2025

An Oncogenic Hepatocyte-Induced Orthotopic Mouse Model of Hepatocellular Cancer Arising in the Setting of Hepatic Inflammation and Fibrosis
00:06

An Oncogenic Hepatocyte-Induced Orthotopic Mouse Model of Hepatocellular Cancer Arising in the Setting of Hepatic Inflammation and Fibrosis

Published on: September 12, 2019

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Tyrosine hydroxylase inhibits HCC progression by downregulating TGFβ/Smad signaling

Guoqian Liu1,2, Mengwei Li1,2, Zimei Zeng2

  • 1Key Laboratory of Molecular Radiation Oncology Hunan Province, Changsha, 410008, Hunan, China.

European Journal of Medical Research
|April 12, 2024
PubMed

Insights

Tyrosine hydroxylase (TH) is reduced in liver cancer (HCC), but higher TH levels improve patient survival. This enzyme inhibits HCC growth and metastasis, suggesting TH as a diagnostic biomarker and therapeutic target.

Area of Science:

  • Biochemistry
  • Oncology
  • Molecular Biology

Background:

  • Metabolic alterations are crucial in hepatocellular carcinoma (HCC) development.
  • The role of tyrosine metabolism dysfunction in HCC remains unclear.

Purpose of the Study:

  • To investigate the function of tyrosine hydroxylase (TH) in hepatocellular carcinoma (HCC).
  • To explore TH as a potential biomarker and therapeutic target for HCC.

Main Methods:

  • Quantification of TH expression in HCC tissues.
  • Analysis of the correlation between TH levels and clinical parameters.
  • Investigation of TH's effect on HCC cell growth and metastasis in vitro.
  • Exploration of TH's interaction with the TGFβ/Smad signaling pathway.

Main Results:

  • TH expression is reduced in HCC, and higher TH levels correlate with improved patient survival.
  • Decreased TH is associated with larger tumor size, increased tumor number, higher AFP levels, and cirrhosis.
  • TH inhibits HCC cell proliferation and metastasis by impairing serine phosphorylation (S19/S40).
  • TH directly binds Smad2, inhibiting TGFβ/Smad signaling activation.

Conclusions:

  • TH possesses non-metabolic functions critical to HCC development.
  • TH may serve as a valuable diagnostic biomarker for HCC.
  • TH represents a potential therapeutic target for metastatic HCC.
Keywords:
Cancer metabolismHepatocellular carcinomaTGFβ/Smad signalingTyrosine hydroxylase

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