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A correction has been published: N Engl J Med 2002;346(9):715.

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Volume 346:23-32 January 3, 2002 Number 1
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Prothrombotic Coagulation Abnormalities Preceding the Hemolytic–Uremic Syndrome
Wayne L. Chandler, M.D., Srdjan Jelacic, B.S., Daniel R. Boster, B.S., Marcia A. Ciol, Ph.D., Glyn D. Williams, M.B., Ch.B., Sandra L. Watkins, M.D., Takashi Igarashi, M.D., Ph.D., and Phillip I. Tarr, M.D.

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ABSTRACT

Background The hemolytic–uremic syndrome is a thrombotic complication of Escherichia coli O157:H7 infection. It is not known whether the coagulation abnormalities precede, and potentially cause, this disorder.

Methods In 53 children infected with E. coli O157:H7, we measured a panel of markers indicating activation of the clotting cascade and renal function within four days after the onset of illness. These markers were measured again in as many as possible of the 16 children in whom the hemolytic–uremic syndrome developed.

Results The children in whom the hemolytic–uremic syndrome subsequently developed had significantly higher median plasma concentrations of prothrombin fragment 1+2, tissue plasminogen activator (t-PA) antigen, t-PA–plasminogen-activator inhibitor type 1 (PAI-1) complex, and D-dimer than children with uncomplicated infection. These abnormalities preceded the development of azotemia and thrombocytopenia. When the hemolytic–uremic syndrome developed, the urinary concentrations of beta2-microglobulin and N-acetyl-{beta}-glucosaminidase rose significantly (P=0.03 for both increases); the plasma concentrations of t-PA antigen, t-PA–PAI-1 complex, D-dimer, and plasmin–antiplasmin complex also increased significantly. The concentration of t-PA antigen correlated with that of the t-PA–PAI-1 complex in a linear regression model (squared correlation coefficient, 0.80; P<0.001).

Conclusions In the hemolytic–uremic syndrome, thrombin generation (probably due to accelerated thrombogenesis) and inhibition of fibrinolysis precede renal injury and may be the cause of such injury.


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From the Departments of Laboratory Medicine (W.L.C.), Anesthesiology (G.D.W.), and Pediatrics (S.L.W., P.I.T.), University of Washington School of Medicine, Seattle; Children's Hospital and Regional Medical Center, Seattle (S.J., D.R.B., M.A.C., G.D.W., S.L.W., P.I.T.); and the Department of Pediatrics, University of Tokyo Graduate School of Medicine, Tokyo, Japan (T.I.).

Address reprint requests to Dr. Tarr at the Division of Gastroenterology, CH-24, Children's Hospital and Regional Medical Center, 4800 Sand Point Way NE, Seattle, WA 98105, or at tarr{at}u.washington.edu.

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