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Cardiovascular Research 2002 55(4):864-869; doi:10.1016/S0008-6363(02)00467-4
© 2002 by European Society of Cardiology
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Copyright © 2002, European Society of Cardiology

Matrix metalloproteinase inhibition reduces adventitial thickening and collagen accumulation following balloon dilation

Marion J Sierevogela,b,*, Evelyn Velemaa, Freek J van der Meera, Manon Oude Nijhuisa, Mirjam Smeetsa,b, Dominique P.V de Kleijna,b, Cornelius Borsta and Gerard Pasterkampa,b

aExperimental Cardiology Laboratory, University Medical Center, Utrecht, The Netherlands
bInteruniversity Cardiology Institute of the Netherlands, Utrecht, The Netherlands

m.sierevogel{at}hli.azu.nl

* Corresponding author. Tel.: +31-30-250-7155; fax: +31-30-252-2693

Objective: Constrictive arterial remodeling following balloon angioplasty has been related to adventitial collagen accumulation and subsequent thickening and can be prevented by matrix metalloproteinase (MMP) inhibition. Following balloon dilation, we examined the effect of MMP inhibition on collagen turnover and the relationship between adventitial area and degree of constrictive remodeling. Methods: In 12 non-atherosclerotic landrace pigs, balloon dilation was performed in 39 peripheral arteries with and without MMP inhibition. Follow up with intravascular ultrasound was performed at 42 days. Collagen content was quantified using polarized light and digital image microscopy. Procollagen expression was determined using immunochemistry and Western blotting. Results: In the MMP inhibitor group, constrictive remodeling was inhibited at 42 days follow up. In control and MMP inhibitor groups, a positive relation was observed between adventitial thickness and degree of constrictive remodeling (P<0.001). Adventitial thickening and adventitial collagen content were reduced in the MMP inhibitor group (P = 0.002 and P = 0.001, respectively). Procollagen immunostaining, but not protein analysis on Western blotting, was decreased in the MMP inhibitor group. Conclusion: MMP inhibition impaired adventitial thickening by reduction of collagen content 42 days after balloon dilation. This might explain its inhibitory effect on constrictive remodeling.

KEYWORDS Angioplasty; Enzyme (kinetics); Remodeling; Arteries; Extracellular matrix


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