UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Inhibition of in-stent restenosis in rabbit iliac arteries with photodynamic therapy

Pai, M; Jamal, W; Mosse, A; Bishop, C; Bown, S; McEwan, J; (2005) Inhibition of in-stent restenosis in rabbit iliac arteries with photodynamic therapy. EUR J VASC ENDOVASC , 30 (6) 573 - 581. 10.1016/j.ejvs.2005.07.003.

Full text not available from this repository.

Abstract

Objectives. Photodynamic therapy (PDT, the combination of light with a photosensitising drug in the presence of oxygen) inhibits restenosis after angioplasty without stenting. This study assesses the potential of PDT for prevention of in-stent restenosis.Design and methods. Normal rabbits were given the photosensitising agent 5-aminolaevulinic acid (ALA) 60 mg/kg, 3 h prior to endovascular illumination of the iliac artery (635 nm at 50 J/cm(2)) either immediately before or after deployment of an oversized Q turn diameter) stent. PDT treated arteries were retrieved 3 or 28 days later and assessed for cell counts and vascular morphometry. Control arteries (stent but no PDT) were examined at 28 days.Results. There were no adverse events and all vessels were patent at the end of the study. At 3 days there was (almost complete medial cell ablation when light was delivered before stent deployment (17 +/- 1 cells/hpf), with little effect when illumination followed stent deployment (184 +/- 17 cells/hpf, p < 0.0001). Twenty-eight days after PDT, the neointimal areas were 1.41 +/- 0.52 mm(2) (stent with no PDT), 1.24 +/- 0.54 mm(2) (light after stent) and 0.60 +/- 0.21 mm(2) (light before stent) (p = 0. 004).Conclusions. PDT before stent deployment caused almost complete medial cell ablation at 3 days with inhibition of in-stent restenosis at 28 days. PDT is worthy of further study as an adjuvant to percutaneous intervention in patients with vascular disease.

Type:Article
Title:Inhibition of in-stent restenosis in rabbit iliac arteries with photodynamic therapy
DOI:10.1016/j.ejvs.2005.07.003
Keywords:in-stent restenosis, photodynamic therapy, EXPERIMENTAL INTIMAL HYPERPLASIA, DRUG-ELUTING STENTS, 5-AMINOLEVULINIC ACID, LIGHT FRACTIONATION, MOTEXAFIN LUTETIUM, RADIATION-THERAPY, CAROTID ARTERIES, CORONARY, PREVENTION, TRIAL
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Medicine (Division of) > Metabolism and Experimental Therapeutics
UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Surgery and Interventional Science (Division of) > Research Department of General Surgery
UCL > School of BEAMS > Faculty of Engineering Science > Medical Physics and Bioengineering

Archive Staff Only: edit this record