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[In vitro studies on immunosuppression with verapamil]
N P Hailer1, R A Blaheta, S Harder
1Klinik für Allgemein- und Abdominalchirurgie, Johann Wolfgang Goethe-Universität Frankfurt am Main.
Zentralblatt Fur Chirurgie
|January 1, 1994
Summary
Verapamil impairs lymphocyte motility and interactions with endothelial cells, independent of calcium channel blockade. This suggests a novel mechanism for Verapamil
Area of Science:
- Immunology
- Pharmacology
- Cell Biology
Context:
- Calcium channel blockers, including Verapamil, are known to have immunosuppressive properties.
- Verapamil's immunosuppressive effects are hypothesized to involve antagonism of protein kinase C (PKC) or calmodulin.
- Lymphocyte adhesion to and migration through endothelial cells are critical processes in immune responses.
Purpose:
- To investigate the effects of Verapamil on lymphocyte adhesion to allogenic endothelial cells.
- To determine if Verapamil impairs lymphocyte migration.
- To explore the roles of PKC and calmodulin in these processes under Verapamil influence.
Summary:
- Verapamil was found to impair lymphocyte motility on endothelial cell monolayers.
- Neither R- nor S-Verapamil inhibited the expression of adhesion molecules (ICAM-1, VCAM-1, ELAM-1); in fact, ELAM-1 and ICAM-1 expression was enhanced.
- The observed effects on lymphocyte motility appear independent of calcium channel blockade and are unlikely due to PKC or calmodulin inhibition.
Impact:
- Verapamil's ability to reduce lymphocyte motility suggests a therapeutic potential in managing immune-related conditions.
- The findings indicate that Verapamil's immunosuppressive effects may operate through mechanisms distinct from calcium channel blockade.
- This research opens new avenues for understanding Verapamil's non-classical actions in modulating immune cell behavior.