Circulating Neutrophil Profiles Undergo a Dynamic Shift during Metabolic Dysfunction-Associated Steatohepatitis...

Area of Science:

• Immunology
• Hepatology
• Cell Biology

Background:

• Neutrophils are vital for host defense but can cause tissue damage through sterile inflammation.
• Neutrophil accumulation is linked to liver fibrosis and cirrhosis in metabolic dysfunction-associated steatohepatitis (MASH).

Purpose of the Study:

• To investigate the role of circulating neutrophils in MASH progression using transcriptomic analysis.
• To identify mechanisms by which neutrophils contribute to liver inflammation and fibrosis in MASH.

Main Methods:

• Transcriptomic analysis of circulating neutrophils from mild and advanced MASH patients and non-diseased controls.
• Comparison of gene expression profiles and neutrophil characteristics between MASH stages and controls.

Main Results:

• Circulating neutrophils in MASH patients exhibit an enhanced activated transcriptional program and prolonged lifespan compared to controls.
• A shift towards premature release of immature, pro-inflammatory neutrophils occurs with MASH progression.
• Immature neutrophils in advanced MASH may exacerbate hepatic inflammation and promote fibrosis.

Conclusions:

• Neutrophil activation and altered release dynamics are key features of MASH progression.
• Immature neutrophils may drive inflammation and fibrosis in advanced MASH, highlighting them as potential therapeutic targets.
• Understanding neutrophil behavior in MASH offers insights into liver disease pathogenesis.