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16 December 2010

Direct inhibitory effects of Ganciclovir on ICAM-1 expression and proliferation in human coronary vascular cells (SI/MPL-ratio: >1)

Rainer VoisardAEF, Ulrike MünderABC, Lutz von MüllerBC, Regine BaurABC, Vinzenz HombachEFG

DOI: 10.12659/MSM.881310

Med Sci Monit 2011; 17(1): PI1-6

Abstract

Background: Treatment of the human cytomegalovirus (HCMV) infection with ganciclovir has beneficial indirect effects on the complex interactions of HCMV with restenosis, atherosclerosis, and transplant vascular sclerosis. The current study reports on direct effects of ganciclovir on expression of ICAM-1 and cell proliferation, key events of coronary atherosclerosis/restenosis. A potential clinical relevance of the data will be evaluated with the help of SI/MPL-ratio’s.
Material/Methods: Definition of the SI/MPL-ratio: relation between significant inhibitory effects in vitro/ex vivo and the maximal plasma level after systemic administration in vivo (ganciclovir: 9 µg/ml). Part I of the study investigated in cytoflow studies the effect of ganciclovir (0.05–5000 µg/mL) on TNF-a induced expression of intercellular adhesion molecule 1 (ICAM-1) in endothelial cells derived from umbilical veins (HUVEC), human coronary endothelial cells (HCAEC), and human coronary smooth muscle cells (HCMSMC). Part II of the study analysed the effect of ganciclovir (0.05–5000 µg/mL) on cell proliferation (HUVEC, HCAEC, and HCMSMC). In part III cytotoxic effects of ganciclovir (0.05–5000 µg/mL) were studied (HUVEC, HCAEC, and HCMSMC).
Results: Ganciclovir caused slight but significant inhibitory effects on expression of ICAM-1 in HUVEC, HCAEC, and HCMSMC. In all three cell types studied strong dose depending significant antiproliferative effects of ganciclovir were detected. Partially, the antiproliferative effects of ganciclovir were caused by cytotoxic effects.
Conclusions: SI/MPL-ratio’s >1 in HCAEC and HCMSMC indicate that the inhibitory effects of gancliclovir on ICAM-1-expression and cell proliferation may only be expected in vivo following local high dose administration e.g. in drug eluting stents (DES).

Keywords: Intercellular Adhesion Molecule-1 - metabolism, Ganciclovir - therapeutic use, Endothelial Cells - metabolism, Dose-Response Relationship, Drug, Coronary Vessels - drug effects, Coronary Restenosis - drug therapy, Cell Proliferation - drug effects, Cell Count, Muscle, Smooth, Vascular - cytology, Umbilical Veins - cytology

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750