Molecular responses of vascular smooth muscle cells to paclitaxel-eluting bioresorbable stent materials

Kytai Truong Nguyen, Nishat Shaikh, Debra Wawro, Sheng Zhang, Nathan D. Schwade, Robert C. Eberhart, Liping Tang

Research output: Contribution to journalArticle

16 Scopus citations

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 languageEnglish (US)
Pages (from-to)513-524
Number of pages12
JournalJournal of Biomedical Materials Research - Part A
Volume69
Issue number3
DOIs
StatePublished - 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

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