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  • Title: A functional single nucleotide polymorphism in the thrombin-activatable fibrinolysis inhibitor (TAFI) gene associates with outcome of meningococcal disease.
    Author: Kremer Hovinga JA, Franco RF, Zago MA, Ten Cate H, Westendorp RG, Reitsma PH.
    Journal: J Thromb Haemost; 2004 Jan; 2(1):54-7. PubMed ID: 14717966.
    Abstract:
    In meningococcal sepsis, disseminated intravascular coagulation with deposition of fibrin and formation of microthrombi occurs in various organs and enhanced inhibition of fibrinolysis is associated with adverse outcome. Recently, TAFI (thrombin-activatable fibrinolysis inhibitor) was identified as a link between coagulation and fibrinolysis, as TAFI can be activated by thrombin and once activated potently attenuates fibrinolysis. On the basis of this one would predict that DNA polymorphisms that increase TAFI activity would deteriorate the outcome in meningococcal sepsis. Therefore, we studied the prevalence of the Thr325Ile dimorphism in the TAFI gene, which is associated with increased TAFIa stability and activity in 50 patients who survived meningococcal disease, in 176 first-degree relatives of a consecutive patient series with meningococcal disease and 212 controls from the same geographic region. The TAFI 325 Ile/Ile genotype was slightly more common among parents of patients with meningococcal disease than in controls (11% vs. 7.1%, P= 0.24). This difference was pronounced among the subgroup of parents of non-surviving patients (19.2%, P= 0.03). Patients whose parents were carriers of the TAFI 325 Ile/Ile genotype had a 1.6-fold (95% CI 0.7-3.7) higher risk to contract meningococcal disease and a 3.1-fold (95% CI 1.0-9.5) increased risk to die from the infection compared with all other genotypes. Survivors had a genotype frequency (4.0%) that was lower than in the general population. TAFI 325 variants affect the outcome of meningococcal disease.
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