Thromb Haemost 2002; 88(06): 919-923
DOI: 10.1055/s-0037-1613334
Review Article
Schattauer GmbH

Intracranial Hemorrhage in Systemic Lupus Erythematosus Associated with an Autoantibody against Factor XIII

Laszlo Lorand
1   Department of Cell and Molecular Biology and the Feinberg Cardiovascular Research Institute, Northwestern University Medical School, Chicago, IL, USA
,
Pauline T. Velasco
1   Department of Cell and Molecular Biology and the Feinberg Cardiovascular Research Institute, Northwestern University Medical School, Chicago, IL, USA
,
John M. Hill
2   Department of Hematology and Medical Oncology, National Naval Medical Center, Bethesda MD, USA
,
Karen J. Hoffmeister
2   Department of Hematology and Medical Oncology, National Naval Medical Center, Bethesda MD, USA
,
Fredric J. Kaye
3   Center for Cancer Research, NCI, NIH, National Naval Medical Center, Bethesda, MD, USA
› Institutsangaben
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Publikationsverlauf

Received 11. Januar 2002

Accepted after resubmission 08. Juli 2002

Publikationsdatum:
09. Dezember 2017 (online)

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Summary

Intracranial hemorrhage in a young woman with systemic lupus erythematosus necessitated two surgical evacuations. In the absence of a family history of bleeding, clot solubility in urea suggested a factor XIII (FXIII) inhibitor. The patient’s IgG bound well to the virgin and the thrombin-modified zymogen ensemble (A2B2 and A2’B2) and to the free rA2 but reacted poorly with the thrombin-modified rA2’. Since the IgG did not block the thrombin-catalyzed proteolysis of A subunits nor the dissociation of the A2’B2, its action might be to interfere with the release of activation peptides from the thrombincleaved zymogen, hindering the conformational change necessary for generating FXIIIa.

Treatment with cryoprecipitate and cyclophosphamide arrested the hemorrhage and almost neutralized the antibody so that the patient’s clot became insoluble in urea and showed a close to normally cross-linked γ-γ and αn fibrin chain profile. Nevertheless, she still has detectable anti-FXIII antibody and may be at risk for hemorrhage.