Resident mesenchymal cells and fibrosis

Area of Science:

• Pathology
• Cell Biology
• Medical Science

Background:

• Fibrosis is a significant cause of mortality, affecting nearly half of deaths in developed countries.
• Fibrosis contributes directly to organ dysfunction and is linked to sterile injuries like diabetes and microvascular disease.
• Leukocyte recruitment often accompanies fibrogenesis, even without infection.

Purpose of the Study:

• To review literature on the central role of mesenchymal cells in fibrogenesis.
• To highlight critical cell-to-cell interactions in fibrotic processes.
• To bridge basic research and human disease in fibrotic conditions.

Main Methods:

• Literature review of studies on fibrogenesis.
• Analysis of fate-mapping and complementary studies in multiple organs.
• Examination of cell-to-cell interactions in fibrotic pathways.

Main Results:

• Mesenchymal cells, including pericytes and fibroblasts, are identified as precursors to myofibroblasts.
• These cells are activated in response to organ injury, driving fibrogenesis.
• Specific cell-cell interactions are crucial for initiating and sustaining fibrosis.

Conclusions:

• Pericytes and fibroblasts are critical players in fibrogenesis, not just passive bystanders.
• Understanding these cellular mechanisms is vital for translating basic research into treatments for fibrotic diseases.
• Targeting cell-cell interactions may offer new therapeutic strategies for fibrosis.