Abstract:
OBJECTIVE:Effective systemic drugs against restenosis upon percutaneous transluminal coronary angioplasty (PTCA) are largely lacking. Polyphenols have been suggested to ameliorate post-angioplasty restenosis. Hawthorn (Crataegus spp.) extracts, which are among the most frequently used herbal medicinal products against mild forms of congestive heart failure, contain polyphenols, but have not been investigated in this context. We aimed to assess the potential of the hawthorn extract WS 1442 to prevent balloon catheter-induced intimal hyperplasia and to elucidate the underlying mechanisms. METHODS:We analyzed the effects of WS 1442 on serum-induced vascular smooth muscle cell (VSMC) and endothelial cell (EC) growth and migration, growth factor-induced proliferation, growth factor receptor activity, and neointima formation in the rat carotid artery model. RESULTS:WS 1442 (100 microg/ml) decreased VSMC migration by 38% and proliferation by 44%, whereas EC migration and proliferation were unaltered. The extract inhibited VSMC DNA synthesis induced by platelet-derived growth factor (PDGF) (IC(50): 47 microg/ml), but not that of basic fibroblast growth factor (bFGF) and epidermal growth factor (EGF). Along this line, WS 1442 blocked recombinant human PDGF receptor (PDGFR)-beta kinase activity (IC(50): 1.4 microg/ml) and decreased PDGFR-beta activation and extracellular signal-regulated kinase (ERK) activation in VSMCs. In rats, orally administered WS 1442 significantly reduced neointima formation after balloon catheter dilatation of the carotid artery. CONCLUSION:WS 1442 inhibits migration and proliferation of VSMCs, but not of ECs, and reduces balloon catheter-evoked neointima formation probably through inhibition of PDGFR-beta. Thus, the present study suggests a novel adjunct pharmacological strategy to prevent angioplasty-related restenosis.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Fürst R,Zirrgiebel U,Totzke F,Zahler S,Vollmar AM,Koch Edoi
10.1016/j.atherosclerosis.2010.04.003subject
Has Abstractpub_date
2010-08-01 00:00:00pages
409-17issue
2eissn
0021-9150issn
1879-1484pii
S0021-9150(10)00257-1journal_volume
211pub_type
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