Abstract | BACKGROUND: Reduced or impaired synthesis of nitric oxide promotes the proliferation of vascular smooth muscle cells, and thus may induce the neointimal formation leading to coronary in- stent restenosis. Recent reports have suggested that the Glu298Asp polymorphism in exon 7 of the endothelial nitric oxide synthase gene is associated with coronary spasm and acute myocardial infarction. In this study, we have examined the implication of this polymorphism with regard to coronary restenosis after Palmaz-Schatz stent deployment. METHODS: Eighty-nine lesions in 85 consecutive patients were treated with Palmaz-Schatz stents, and were prospectively followed up for 6 months. The lesions were classified into a restenosis group (% diameter stenosis=50%) and a non-restenosis group. Assessment was made using an automated quantitative angiographic system. We performed polymerase chain reaction-restriction fragment length polymorphism analysis to detect the missense Glu298Asp variant in exon 7 of the endothelial nitric oxide synthase gene. RESULTS: Coronary risk factors and angiographic findings of stenotic lesions did not differ between the groups. Univariate analyses showed that the missense Glu298Asp variant was the only statistically significant predictor of restenosis (odds ratio, 4.27; P=0.025). In addition, multiple logistic regression analysis revealed the missense Glu298Asp variant as the only independent predictor for in- stent restenosis (odds ratio, 3.90; P=0.036). CONCLUSIONS: The missense Glu298Asp variant may be an independent risk factor for in- stent restenosis.
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Authors | Tomomichi Suzuki, Kenji Okumura, Takahito Sone, Tai Kosokabe, Hideyuki Tsuboi, Junichiro Kondo, Hiroaki Mukawa, Hiroki Kamiya, Takahito Tomida, Hajime Imai, Hideo Matsui, Tetsuo Hayakawa |
Journal | International journal of cardiology
(Int J Cardiol)
Vol. 86
Issue 1
Pg. 71-6
(Nov 2002)
ISSN: 0167-5273 [Print] Netherlands |
PMID | 12243851
(Publication Type: Journal Article)
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Chemical References |
- Aspartic Acid
- Glutamic Acid
- Nitric Oxide Synthase
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Topics |
- Aged
- Aged, 80 and over
- Aspartic Acid
(genetics)
- Coronary Restenosis
(genetics)
- Endothelium, Vascular
(enzymology)
- Female
- Genotype
- Glutamic Acid
(genetics)
- Humans
- Logistic Models
- Male
- Middle Aged
- Mutation, Missense
- Nitric Oxide Synthase
(genetics)
- Polymerase Chain Reaction
- Polymorphism, Genetic
- Polymorphism, Restriction Fragment Length
- Stents
(adverse effects)
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