Hepatocyte Nuclear Factor 4α and Gene Regulation in Liver Diseases

Hepatocyte Nuclear Factor 4α (HNF4α) is a ligand-dependent nuclear receptor that serves as a master transcription factor in mature hepatocytes. It sits at the apex of gene-regulatory networks controlling lipid and glucose metabolism, bile acid synthesis and conjugation, amino acid catabolism and coagulation. By binding DNA as a homodimer, HNF4α maintains the differentiated state of the liver, enforces cell polarity and restricts proliferative programmes. Loss or reduction of HNF4α activity is a hallmark of chronic liver diseases, including non-alcoholic steatohepatitis, fibrosis and hepatocellular carcinoma. Post-translational modifications—such as phosphorylation by energy-sensing kinases—fine-tune its stability, dimerisation and promoter occupancy. Moreover, fluctuations in endogenous ligands driven by nutritional status or disease-associated mutations can modulate HNF4α target-gene expression. Therapeutic strategies that restore or enhance HNF4α function show promise for reversing steatosis, limiting fibrosis and arresting oncogenic progression, underlining the global importance of this factor in liver health and disease.

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Hepatocyte Nuclear Factor 4α and Gene Regulation in Liver Diseases publication trend

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Technical terms

Hepatocyte Nuclear Factor 4α (HNF4α): A liver-enriched nuclear receptor that regulates hepatocyte differentiation and metabolic gene expression.

Transcription factor: A protein that binds specific DNA sequences to control the rate of gene transcription.

Hepatocyte: The principal functional cell of the liver, responsible for metabolism, detoxification and bile production.

Hepatocellular carcinoma (HCC): A primary malignant tumour of the liver arising from hepatocytes.

Bile acids: Cholesterol-derived metabolites synthesised in the liver, essential for dietary lipid absorption and cholesterol homeostasis.

Steatosis: Excessive accumulation of triglycerides within hepatocytes, often a precursor to steatohepatitis.

Fibrosis: Pathological accumulation of extracellular matrix in the liver, leading to impaired function and architecture.

Non-alcoholic steatohepatitis (NASH): An advanced form of fatty liver disease characterised by inflammation, hepatocyte injury and varying degrees of fibrosis.

References

1. Suppression of Hepatocyte Proliferation by Hepatocyte Nuclear Factor 4α in Adult Mice*. Journal of Biological Chemistry (2012).
2. Progression of HCC in mice is associated with a downregulation in the expression of hepatocyte nuclear factors. Hepatology (2004).
3. AMP-activated Protein Kinase Regulates HNF4α Transcriptional Activity by Inhibiting Dimer Formation and Decreasing Protein Stability*. Journal of Biological Chemistry (2003).
4. Systematic integrative analysis of gene expression identifies HNF4A as the central gene in pathogenesis of non-alcoholic steatohepatitis. PLOS ONE (2017).
5. Hepatocyte Nuclear Factor 4α Is a Central Regulator of Bile Acid Conjugation*. Journal of Biological Chemistry (2003).