Evaluation of Endothelium-Protective Effects of
Drugs in Experimental Models of Endothelial Damage
V. Kristová, M. Kriška, P. Babál1, M. N. Djibril, J. Slámová, A.
Kurtanský2
Department of Pharmacology, 1Department of
Pathology and 2Department of Physiology, Faculty of Medicine, Comenius
University, Bratislava, Slovak Republic
Received July 30, 1999
Accepted September 21, 1999
Summary
Endothelium-protective properties of pharmacological
agents may be assessed by using different experimental models of endothelial dysfunction
or injury. The model of endothelial dysfunction induced by vessel perfusion with polymorphonuclear leukocytes (PMN) was used for evaluation of pentoxifylline (PTX) effects
on vasoconstrictor responses to noradrenaline (NA) in the rabbit renal artery. Addition of PMN into the perfusion solution significantly increased the responses to NA at all doses. PTX administration (10-5 mol.l1) significantly diminished the
constrictor responses to NA in vessels perfused with PMN+PTX when compared to the
responses in PMN-perfused vessels (at dose 0.1 m g: 32.25 vs. 14.25, at dose 1 m g: 51 vs. 27.75 (p<0.01), at dose 10 m g 74.25 vs. 39.75 (p<0.05), all values
expressed as median of perfusion pressure in mm Hg). The model of endothelial damage
induced by repeated NA administration in 5 doses (10-50 m
g of NA) was used for evaluation of the endothelium-protective effect
of sulodexide (SLX). It was found that SLX (120 U/l) significantly decreased the number of
desquamated endothelial cells (EC) compared to the control group (controls: 131.4± 20.1
EC, +SLX: 83.3± 13.8 EC, p<0.01). These results confirmed the favorable
endothelium-protective effects of pentoxifylline and sulodexide in the two experimental
models.
Key words
Models of endothelial dysfunction and damage · Endothelium-protective effects · Sulodexide · Pentoxifylline
Reprint requests
V. Kristová, M.D., Ph.D., Department of Pharmacology, Faculty of Medicine, Comenius
University, Sasinkova 4, 813 72 Bratislava, Slovak Republic, e-mail: farmakologia@fmed.uniba.sk.
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