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Eicosanoid production by the coronary microvascular endothelium
Federation Proceedings
|January 1, 1987
Summary
Rabbit coronary microvessel endothelial cells regulate prostaglandin production. Inflammatory mediators stimulate prostaglandin release, while calcium and glucocorticoids modulate this process.
Area of Science:
- Cardiovascular Biology
- Endothelial Cell Biology
- Inflammation Research
Background:
- Cultured rabbit coronary microvessel endothelial (RCME) cells serve as a controlled in vitro model.
- Studying microvascular endothelial cell prostaglandin (PG) production is crucial for understanding local inflammatory responses.
Purpose of the Study:
- To investigate the regulation of prostaglandin production by RCME cells.
- To identify key mediators and cellular mechanisms involved in PG synthesis and release.
Main Methods:
- Utilized cultured RCME cells as an in vitro model.
- Stimulated cells with various inflammatory mediators, hormones, and drugs.
- Manipulated calcium availability and glucocorticoid treatments.
Main Results:
- Inflammatory substances like histamine and leukotriene D4 were potent stimulators of PG secretion.
- Calcium influenced PG release, potentially regulating both synthesis and reacylation.
- Glucocorticoids inhibited PG production through a mechanism involving new protein synthesis and "endocortin."
Conclusions:
- Microvascular endothelial cells play a dual role in cardiac inflammation, contributing to it via PG release and limiting it through endocortin production.
- Calcium ions and glucocorticoids are key regulators of endothelial cell PG synthesis and release.