Abstract:
:In order to obtain information about the developmental mechanisms of restenosis after angioplasty, we investigated an association between the expression of platelet-derived growth factors (PDGFs) and neointimal cell accumulation in rabbit femoral arteries subjected to balloon angioplasty. Northern analysis demonstrated that mRNA expression of PDGF B-chain (PDGF-B) increased markedly in the injured arteries, peaking at day 7 (sevenfold), and the transcripts remained augmented until day 21. Also transcripts of PDGF beta-receptor (PDGFR-beta) and alpha-receptor increased by 3- and 2.5-fold, respectively, but those of PDGF A-chain showed only a slight increase (1.5-fold). In situ hybridization and immunohistochemistry demonstrated the concordant expression of mRNA and protein for PDGF-B in the smooth muscle cells (SMCs) of injured vessels throughout the experiment. PDGF-B expression peaked in neointimal SMCs at day 7. In accordance with PDGF-B expression, cellular proliferation in neointima peaked at day 7, being followed by a dramatic increase of neointimal areas thereafter. Further, we demonstrated PDGFR-beta immunoreactivity in these neointimal cells with PDGF-B expression. Our data provide evidence that PDGF-B may stimulate vascular SMC proliferation and contribute to neointimal formation after angioplasty.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Uchida K,Sasahara M,Morigami N,Hazama F,Kinoshita Mdoi
10.1016/0021-9150(95)05742-0subject
Has Abstractpub_date
1996-07-01 00:00:00pages
9-23issue
1eissn
0021-9150issn
1879-1484pii
0021-9150(95)05742-0journal_volume
124pub_type
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