Abstract:
:Human aortic smooth muscle cells (AoSMCs) change their extracellular matrix composition during aging, with direct effects on cellular events and cell migration. For example, active matrix metalloproteinase-2 (MMP-2) is synthesized only by young AoSMCs, whereas aged cells produce only the inactive zymogen form. The pro-MMP-2 activation in young cells depends on an increase in membrane type 1 matrix metalloproteinase content. Furthermore, transcripts coding for tissue inhibitor of metalloproteinases (TIMPs) were upregulated in aged cells, and the increase of TIMPs also could prevent pro-MMP-2 activation. As consequence of these situations, young AoSMCs possess a higher migratory capability than aged cells on gelatin support. These data are confirmed by adding TIMP-1 and TIMP-2 to young cells which reproduces aged AoSMCs migratory behavior. The opposite effect was obtained in young cells silencing MMP-2 and TIMP-2.
journal_name
Connect Tissue Resjournal_title
Connective tissue researchauthors
Vigetti D,Moretto P,Viola M,Genasetti A,Rizzi M,Karousou E,Clerici M,Bartolini B,Pallotti F,De Luca G,Passi Adoi
10.1080/03008200802143141subject
Has Abstractpub_date
2008-01-01 00:00:00pages
189-92issue
3eissn
0300-8207issn
1607-8438pii
795331782journal_volume
49pub_type
杂志文章abstract::Solutions of type I acid soluble collagen were studied in light and electron microscopy at concentrations over 40 mg/ml. Banded patterns spontaneously emerge in samples observed between crossed polars between slide and coverslip. The textures are interpreted as precholesteric, appearing at the transition between the i...
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journal_title:Connective tissue research
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