The genetics of antithrombin

Thrombosis Research
Javier CorralVicente Vicente

Abstract

Antithrombin is a key endogenous anticoagulant whose deficiency constitutes a strong risk factor for thrombosis. The study of antithrombin deficiency has generated excellent, and in some cases, surprising results that may be extrapolated to other thrombophilia and genetic disorders. Routine diagnosis of antithrombin deficiency is based on functional assays. Few specialized laboratories also perform genetic analysis, even though nowadays it is a simple, fast and cheap process that generates relevant information with clinical usefulness. Molecular analysis of SERPINC1, the gene encoding antithrombin, has been restricted so far to cases with confirmed or familial antithrombin deficiency. However, some pathogenic mutations are not detected by current functional methods and other gene defects may have functional consequences only observed under specific conditions. Thus, molecular analysis may be the best method to identify antithrombin deficiency. Up to 80% of patients with antithrombin deficiency have SERPINC1 gene defects, mostly (90% of the 315 gene defects described so far) point mutations or small deletions or insertions affecting the 7 exons or flanking regions. The description of new SERPINC1 gene defects may reveal new resi...Continue Reading

Citations

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