Endothelial dysfunction in cirrhosis and portal hypertension

Area of Science:

• Vascular biology
• Hepatology
• Hemodynamics

Background:

• Portal hypertension (PHT) is a common complication of chronic liver diseases, marked by elevated portal pressure.
• Altered hemodynamic forces in PHT significantly influence endothelial and vascular smooth muscle cell (VSMC) signaling and function.

Purpose of the Study:

• To review the role of hormonal and mechanical forces in endothelial dysfunction in PHT.
• To examine how these forces affect VSMC structure and function.
• To discuss intracellular mechanisms regulating vasoactive substance release in PHT vasculopathy.

Main Methods:

• Literature review focusing on endothelial and vascular smooth muscle cell signaling in PHT.
• Analysis of the impact of hemodynamic changes on vasoactive substance release.
• Examination of intracellular processes regulating endothelial cell transformation.

Main Results:

• Endothelial cells release vasoactive substances (e.g., nitric oxide, prostacyclin) in response to humoral and mechanical stimuli.
• These substances profoundly affect VSMC function and structure, influencing reactivity (hypo- or hyper-reactivity).
• Endothelial dysfunction in PHT can lead to vasculopathy, potentially promoting disease progression.

Conclusions:

• Hormonal and mechanical forces critically regulate endothelial function and vasoactive mediator release in PHT.
• Understanding these mechanisms is key to addressing VSMC dysfunction and PHT-related vasculopathy.
• Targeting these pathways may offer therapeutic strategies for managing chronic liver disease complications.