Structure and function of mesothelial cells.

Area of Science:

• Cell Biology
• Histology
• Immunology

Background:

• Mesothelial cells, known for ~180 years, are increasingly recognized for their vital roles in serosal membrane integrity and function.
• These sentinel cells actively participate in fluid transport, immune responses, and tissue repair, and may prevent tumor metastasis.

Purpose of the Study:

• To highlight the current understanding of mesothelial cell functions.
• To identify knowledge gaps regarding mesothelial cell communication, differentiation, repair mechanisms, and roles in serosal pathologies.
• To emphasize the need for comparative studies across species and anatomical sites, considering factors like aging.

Main Methods:

• Review of existing literature on mesothelial cell biology.
• Analysis of recent studies on aging human peritoneal mesothelial cells.
• Comparative assessment of mesothelial cell characteristics.

Main Results:

• Mesothelial cells secrete key substances for serosal lubrication and actively transport substances across membranes.
• They synthesize diverse mediators involved in inflammation, immunity, and tissue repair.
• Aging human peritoneal mesothelial cells exhibit a pro-inflammatory profile, suggesting age-related functional alterations.

Conclusions:

• Understanding mesothelial cell mechanisms is crucial for maintaining serosal integrity and preventing peritoneal tumor dissemination.
• Further research is essential to elucidate cell communication, differentiation, repair processes, and pathological roles.
• Functional and physiological adaptations, influenced by factors like aging and anatomical site, necessitate detailed investigation.