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Isolation, culture and characterization of human peritoneal mesothelial cells
E Stylianou1, L A Jenner, M Davies
1Institute of Nephrology, University of Wales College of Medicine, Cardiff, United Kingdom.
Abstract:
This study establishes a reproducible technique for the culture of human peritoneal mesothelial cells. Direct explants, as well as enzymatically degraded specimens, of human omentum have been used as the source of cells. Cells were grown on collagen and gelatin coated matrices and were maintained in supplemented Ham's F-12 medium containing 10% (vol/vol) Fetal calf serum. Morphologically and ultrastructurally, the cells formed a homogeneous population. They were polygonal when confluent and devoid of contaminating fibroblasts, endothelial cells and macrophages. Cultured mesothelial cells co-expressed cytokeratin and vimentin and synthesized laminin, fibronectin, mesosecrin, non-specific esterase and collagen Types I and III but not Type IV. Ultrastructural features included numerous surface microvilli, cytoplasmic vesicles and an abundant endoplasmic reticulum. The stimulation of mesothelial cells by the calcium ionophore A23187 demonstrated that the two major products of arachidonic acid metabolism were prostacyclin and prostaglandin E2. The peritoneal mesothelial cell may be pivotal in the initiation of the inflammatory response during peritonitis and its establishment in culture will provide the basis for an in vitro model of peritoneal inflammation.
Insights
Researchers developed a reliable method to culture human peritoneal mesothelial cells. This breakthrough enables an in vitro model for studying peritoneal inflammation and related conditions.
Area of Science:
- Cell Biology
- Immunology
- Gastroenterology
Background:
- Human peritoneal mesothelial cells (HPMCs) play a crucial role in peritoneal inflammation.
- Establishing a reliable in vitro model for HPMCs is essential for studying peritoneal diseases.
Purpose of the Study:
- To develop a reproducible technique for culturing human peritoneal mesothelial cells.
- To characterize the cultured cells and assess their suitability for in vitro studies.
Main Methods:
- Human omentum explants and enzymatically degraded specimens were used as cell sources.
- Cells were cultured on collagen and gelatin-coated matrices in supplemented Ham's F-12 medium.
- Morphological, ultrastructural, and biochemical characterization was performed.
Main Results:
- A homogeneous population of polygonal mesothelial cells was obtained, free from contaminants.
- Cultured HPMCs expressed cytokeratin, vimentin, and synthesized specific extracellular matrix proteins and enzymes.
- Stimulation with A23187 revealed prostacyclin and prostaglandin E2 as major arachidonic acid metabolites.
Conclusions:
- A reproducible method for culturing human peritoneal mesothelial cells was established.
- The cultured cells possess characteristics suitable for an in vitro model.
- This model can facilitate research into peritoneal inflammation and related pathologies.