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Cerebromicrovascular endothelial permeability. In-vitro studies.
O Kempski1, A Villacara, M Spatz
1Laboratory of Neuropathology and Neuroanatomical Sciences, National Institute of Neurological and Communicative Disorders and Stroke, Bethesda, MD 20892.
Acta Neuropathologica
|January 1, 1987
Summary
This study shows that high arachidonic acid and indomethacin increase blood-brain barrier permeability in a new cell model. Dexamethasone prevented indomethacin
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- The blood-brain barrier (BBB) protects the brain but its permeability can be altered in pathological conditions.
- Understanding the mechanisms regulating BBB permeability is crucial for treating neurological disorders.
Purpose of the Study:
- To investigate the permeability of cerebromicrovascular endothelium using a novel cell culture model.
- To examine the effects of arachidonic acid and related compounds on endothelial barrier function.
Main Methods:
- Cultured endothelial cells on dextran microcarriers formed a barrier to trypan blue (TB).
- Permeability was assessed by TB passage after exposure to arachidonic acid, indomethacin, ibuprofen, dexamethasone, and forskolin.
Main Results:
- High concentrations of arachidonic acid and indomethacin enhanced TB passage, indicating increased permeability.
- Ibuprofen did not affect permeability.
- Dexamethasone pretreatment prevented indomethacin-induced permeability increase, while dexamethasone alone had no effect.
- Forskolin did not alter endothelial permeability.
Conclusions:
- Disturbed cellular membranes and their metabolites may contribute to altered BBB function in disease.
- Specific pathways involving arachidonate metabolism appear to influence BBB integrity.