Cytokine Regulation in Hepatic Fibrosis

Hepatic fibrosis is marked by the excessive deposition of extracellular matrix proteins in response to chronic liver injury, underpinning the progression to cirrhosis and organ failure. Cytokines, as soluble mediators of the immune response, orchestrate this fibrogenic process through a complex network of pro- and anti-inflammatory signals. Key pro-fibrotic cytokines such as transforming growth factor-beta (TGF-β) activate hepatic stellate cells (HSCs), inducing their transdifferentiation into myofibroblast-like cells that secrete collagen. Tumour necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) further amplify HSC activation and promote inflammation, whereas regulatory cytokines such as interleukin-10 (IL-10) and interferon-gamma (IFN-γ) counterbalance these effects by limiting immune cell recruitment and stimulating matrix degradation. Crosstalk among resident Kupffer cells, infiltrating lymphocytes and HSCs establishes a dynamic microenvironment in which cytokine gradients determine the balance between matrix accumulation and resolution. Emerging evidence highlights the role of genetic polymorphisms in cytokine genes as determinants of individual susceptibility to fibrosis, while inter-organ signalling mediators such as myokines reveal novel systemic regulators of hepatic scarring. An integrated understanding of this cytokine network offers the potential to identify biomarkers of disease progression and to develop targeted interventions that modulate specific signalling pathways to halt or reverse fibrogenesis.

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Cytokine Regulation in Hepatic Fibrosis publication trend

The graph below shows the total number of articles in cytokine regulation in hepatic fibrosis across all publications each year (not limited to Nature Index journals).

Technical terms

Cytokine: A small secreted protein that mediates immune and inflammatory responses by acting on target cells.

Hepatic stellate cell (HSC): A perisinusoidal liver cell that, upon activation, differentiates into a collagen-secreting myofibroblast.

Transforming growth factor-beta (TGF-β): A multifunctional cytokine central to the activation of HSCs and promotion of extracellular matrix synthesis.

Tumour necrosis factor-alpha (TNF-α): A pro-inflammatory cytokine that amplifies liver inflammation and contributes to fibrogenic signalling.

Interleukin-10 (IL-10): An anti-inflammatory cytokine that limits immune activation and promotes matrix degradation.

Single-nucleotide polymorphism (SNP): A variation at a single base position in the genome that can affect gene function or expression.

References

1. The TNF-α rs361525 and IFN-γ rs2430561 polymorphisms are associated with liver cirrhosis risk: a comprehensive meta-analysis. Frontiers in Immunology (2023).
2. Myokines: Crosstalk and Consequences on Liver Physiopathology. Nutrients (2023).
3. Role of Inflammatory/Immune Response and Cytokine Polymorphisms in the Severity of Chronic Hepatitis C (CHC) before and after Direct Acting Antiviral (DAAs) Treatment. International Journal of Molecular Sciences (2023).
4. Liver and blood cytokine microenvironment in HCV patients is associated to liver fibrosis score: a proinflammatory cytokine ensemble orchestrated by TNF and tuned by IL-10. BMC Microbiology (2016).