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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Arterioscler+Thromb+Vasc+Biol
2013 ; 33
(6
): 1230-7
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English Wikipedia
Cocaine and specific cocaine metabolites induce von Willebrand factor release
from endothelial cells in a tissue-specific manner
#MMPMID23539221
Hobbs WE
; Moore EE
; Penkala RA
; Bolgiano DD
; López JA
Arterioscler Thromb Vasc Biol
2013[Jun]; 33
(6
): 1230-7
PMID23539221
show ga
OBJECTIVE: Cocaine use is associated with arterial thrombosis, including
myocardial infarction and stroke. Cocaine use results in increased plasma von
Willebrand factor (VWF), accelerated atherosclerosis, and platelet-rich arterial
thrombi, suggesting that cocaine activates the endothelium, promoting
platelet-VWF interactions. APPROACH AND RESULTS: Human umbilical vein endothelial
cells, brain microvasculature endothelial cells, or coronary artery endothelial
cells were treated with cocaine or metabolites benzoylecgonine, cocaethylene,
norcocaine, or ecgonine methylester. Supernatant VWF concentration and multimer
structure were measured, and platelet-VWF strings formed on the endothelial
surface under flow were quantified. Cocaine, benzoylecgonine, and cocaethylene
induced endothelial VWF release, with the 2 metabolites being more potent than
the parent molecule. Brain microvasculature endothelial cells were more sensitive
to cocaine and metabolites than were human umbilical vein endothelial cells or
coronary artery endothelial cells. Coronary artery endothelial cells released VWF
into the supernatant but did not form VWF-platelet strings. Intracellular cAMP
concentration was not increased after treatment with cocaine or its metabolites.
CONCLUSIONS: Both cocaine and metabolites benzoylecgonine and cocaethylene
induced endothelial VWF secretion, possibly explaining thrombotic risk after
cocaine ingestion. VWF secretion is likely to vary between vascular beds, with
brain endothelial cells being particularly sensitive. These results suggest that
clinical management of cocaine-induced ischemia may benefit from therapies aimed
at disrupting the VWF-platelet interaction.