Abstract
We studied the influence of paclitaxel, eluted from poly(L-lactic acid) (PLLA), on cultured vascular smooth muscle cell (VSMC) proliferation as a model of bioresorbable stent-induced restenosis. We blended paclitaxel in cast PLLA films (P-PLLA), demonstrating controlled release of the drug, then studied VSMC adhesion, proliferation, and gene expression profiles. No difference in cell adhesion was found between P-PLLA and PLLA controls (105 ± 12% of PLLA controls). However, P-PLLA significantly reduced VSMC proliferation (40 ± 15% of PLLA controls, p < 0.05). Using cDNA microarray technology, we identified major effects of P-PLLA, including: upregulation of genes related to apoptosis, anti-proliferation and antioxidation; and suppression of cell cycle regulators and cell survival markers. The expression patterns indicate that P-PLLA regulates gene expression and cell functions via new pathways, including receptor tyrosine kinase (RTKs), mitogen-activated protein kinase (MAPKs), and protein kinase (PKs, e.g., PKA) pathways, in addition to the stabilization of polymerized-microtubules.
Original language | English (US) |
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Pages (from-to) | 513-524 |
Number of pages | 12 |
Journal | Journal of Biomedical Materials Research - Part A |
Volume | 69 |
Issue number | 3 |
DOIs | |
State | Published - Jun 1 2004 |
Keywords
- Cell proliferation
- Paclitaxel
- Poly(L-lactic acid)
- Restenosis
- Vascular smooth muscle cells
- cDNA-microarray
ASJC Scopus subject areas
- Ceramics and Composites
- Biomaterials
- Biomedical Engineering
- Metals and Alloys