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Thromb Haemost 1998; 80(05): 743-748
DOI: 10.1055/s-0037-1615352
Review Article
Schattauer GmbH

A Mutation in the Thrombomodulin Gene, 127G to A Coding for Ala25Thr, and the Risk of Myocardial Infarction in Men

Carine J. M. Doggen
1   From the Departments of Clinical Epidemiology, Hemostasis and Thrombosis Research Center, The Netherlands
,
Gabriella Kunz
5   From the Departments of Haematology, Imperial College School of Medicine, Charing Cross Hospital, London, UK
,
Frits R. Rosendaal
1   From the Departments of Clinical Epidemiology, Hemostasis and Thrombosis Research Center, The Netherlands
2   From the Departments of Hemostasis and Thrombosis Research Center, The Netherlands
,
David A. Lane
5   From the Departments of Haematology, Imperial College School of Medicine, Charing Cross Hospital, London, UK
,
Hans L. Vos
2   From the Departments of Hemostasis and Thrombosis Research Center, The Netherlands
,
Peter J. Stubbs
4   From the Departments of Cardiology, London, UK
,
Volkert Manger Cats
3   From the Departments of Cardiology, Leiden University Medical Center, The Netherlands
,
Helen Ireland
5   From the Departments of Haematology, Imperial College School of Medicine, Charing Cross Hospital, London, UK
› Author Affiliations
Further Information

Publication History

Received 23 March 1998

Accepted after resubmission 04 April 1998

Publication Date:
07 December 2017 (online)

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Summary

Thrombomodulin is an endothelial cell surface receptor that transforms the procoagulant thrombin into an anticoagulant. A mutation in the thrombomodulin gene is a potential risk factor for venous and arterial thrombosis.

We screened a region within the coding sequence of the thrombomodulin gene by single-strand conformation polymorphism analysis (SSCP) in a pilot study of 104 patients with myocardial infarction and 104 age, sex and race matched controls. We identified a 127G to A mutation in the gene, which predicts an Ala25Thr substitution, in 2 out of 104 patients (1 man and 1 woman) with myocardial infarction but in no controls. We assessed the risk of myocardial infarction associated with the mutation in a larger “Study of Myocardial Infarctions Leiden” (SMILE). Among 560 men with a first myocardial infarction before the age of 70, 12 were carriers of the Ala25Thr substitution. In a control group of 646 men, frequency-matched for age, seven were carriers of the Ala25Thr substitution. The allelic frequencies were 1.07% among patients and 0.54% among controls suggesting risk associated with the mutation [odds ratio (OR) 2.0, 95% confidence interval (CI) 0.8-5.1]. In patients aged below 50, the predicted risk was almost seven times increased (OR 6.5, CI 0.8-54.2). In the presence of additional risk factors, such as smoking and a metabolic risk factor, the predicted risk increased to 9-fold (OR 8.8, CI 1.8-42.2) and 4-fold (OR 4.4, CI 0.9-21.3), respectively.

While not conclusive, these results strongly suggest that the Ala25Thr substitution is a risk factor for myocardial infarction, especially in young men, and when in the presence of additional risk factors.

 

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