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IgG treatment during pregnancy reduces severity of rare, recurring liver condition in newborns

CHICAGO --- Treatment with high-dose immunoglobulin G (IgG) during pregnancy lessens the severity of hemochromatosis (NH), a rare, devastating gestational disease with abnormal iron accumulation in the liver and severe liver injury that almost always results in fetal death or acute liver failure in newborns.

In an article in the Nov. 6 issue of The Lancet, researchers Peter F. Whitington, M.D., and Judith U. Hibbard, M.D., described the effectiveness of treating mothers with IgG in reducing liver injury in babies with recurrent NH.

Whitington, a noted authority on liver disease, is professor of pediatrics at Northwestern University Feinberg School of Medicine, Children's Memorial Hospital. Hibbard is professor of maternal-fetal medicine, University of Illinois Chicago and held a similar position at the Pritzker School of Medicine, University of Chicago, during the course of the study.

One of the most devastating aspects of NH to affected families is that after a woman has had one baby with the disorder, her risk for recurrence of NH in another child is 80 percent. A woman may have unaffected children before having the first one with NH. After that, most or all pregnancies end with fetal death or a child born with NH.

Currently, there is no test to determine if a pregnancy will be affected, and there is no effective approach to prenatal diagnosis of NH. The best advice available to date for such women is to avoid pregnancy.

Until now, the cause of NH has been unknown. Whitington hypothesized that it is an alloimmune disease based on its unusual pattern of recurrence, which is similar to the known alloimmune diseases hydrops fetalis due to Rh incompatibility and neonatal alloimmune thrombocytopenia.

Treatment with IgG has been found effective in the treatment of these alloimmune blood disorders, so Whitington proposed its use in NH.

The positive results of the current study provide support for the th
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Contact: Elizabeth Crown or Kathleen Ellis
e-crown@northwestern.edu
312-503-8928
Northwestern University
9-Nov-2004


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