AI Article Synopsis
- The study explored how paclitaxel, released from poly(L-lactic acid) (PLLA), affects the growth of vascular smooth muscle cells (VSMCs), relevant for bioresorbable stents and restenosis.
- The results showed that while paclitaxel did not affect VSMC adhesion, it significantly inhibited their proliferation.
- Gene expression analysis revealed that paclitaxel influences multiple pathways related to cell survival, apoptosis, and anti-proliferation, altering VSMC function in new ways.
Article 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.
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| http://dx.doi.org/10.1002/jbm.a.30020 | DOI Listing |
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