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Screening Assays to Characterize Novel Endothelial Regulators Involved in the Inflammatory Response
Published on: September 15, 2017
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Methylene blue modulates adhesion molecule expression on microvascular endothelial cells
Isabella Werner1, Fengwei Guo, Ulrich A Stock
1Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Theodor Stern Kai 7, 60590, Frankfurt am Main, Germany, Isabella.Werner@kgu.de.
Summary
Methylene blue (MB) modulates endothelial cell adhesion molecule expression, potentially impacting inflammation. This study investigated MB
Area of Science:
- Endothelial cell biology
- Immunology
- Pharmacology
Background:
- Vasoplegic syndrome and shock are linked to systemic inflammation.
- Methylene blue (MB) is explored for its potential to preserve blood pressure in these conditions.
Purpose of the Study:
- To investigate the effect of MB on adhesion molecule expression in endothelial cells.
- To understand MB's immunomodulatory role in inflammation.
Main Methods:
- Human microvascular endothelial cells (HuMEC-1) were treated with varying MB concentrations and durations.
- Cells were co-cultured with peripheral blood mononuclear cells or Jurkat cells.
- Adhesion molecule expression (ICAM-1, VCAM-1, E-selectin) was analyzed via FACS and Western blot.
Main Results:
- MB treatment increased E-selectin and VCAM-1 expression in a dose- and time-dependent manner.
- ICAM-1 expression varied based on co-cultured blood cell types, indicating differential effects.
- Soluble forms of adhesion molecules in supernatants were also analyzed.
Conclusions:
- Methylene blue exhibits immunomodulatory effects on endothelial cells.
- MB influences adhesion molecule expression, suggesting a role in managing inflammatory responses.
