Human Liver MSCs Retain Their Basic Cellular Properties in Chronically Inflamed Liver Tissue.

Area of Science:

• Hepatology and Regenerative Medicine
• Stem Cell Biology

Background:

• Liver diseases cause significant global mortality, necessitating advanced therapies.
• Mesenchymal stem cells (MSCs) are crucial for liver health and post-transplant recovery.
• The impact of chronic inflammation on liver-resident MSC properties is not well understood.

Purpose of the Study:

• To compare the fundamental cellular characteristics of resident mesenchymal stem cells (MSCs) from healthy versus chronically inflamed human livers.
• To determine if chronic liver inflammation alters MSC properties relevant to cell therapy.

Main Methods:

• Comprehensive analysis of resident MSCs isolated from normal and diseased liver tissues (fibrosis, cirrhosis, viral hepatitis).
• Evaluation included MSC marker expression, stem cell markers, adhesion molecules, senescence, proliferation, migration, and secretome analysis.
• Specific assessment of immune checkpoints and toll-like receptor expression.

Main Results:

• Chronic inflammation did not alter major MSC characteristics, including key markers, senescence, proliferation, migration, and secretome.
• Only the expression of certain immune checkpoints and toll-like receptors showed differences.
• Resident MSCs retain consistent cellular properties even in advanced stages of liver inflammatory diseases.

Conclusions:

• Human liver-resident mesenchymal stem cells (MSCs) exhibit stable cellular properties irrespective of chronic inflammatory conditions.
• These MSCs, even from diseased livers, are viable candidates for cell-based therapies for liver pathologies.
• The study validates the potential of resident MSCs for developing novel liver disease treatments.