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Maternal liver grafts more tolerable for children with rare disease
Date:1/3/2012

Children with a rare, life-threatening disease that is the most common cause of neonatal liver failure biliary atresia better tolerate liver transplants from their mothers than from their fathers, according to a UCSF-led study.

In the study, researchers reviewed all pediatric liver transplants nationwide from 1996 to 2010, and compared the outcomes for patients who received liver grafts from their mothers with those for patients who received livers from their fathers.

Researchers believe the improved outcomes for children receiving a maternal liver graft may be due to higher levels of maternal cells in the patients' livers. The presence of these cells may establish tolerance to maternal antigens substances that induce an immune response and therefore greater acceptance of maternal organs in these biliary atresia patients.

"This result is exciting because it supports the concept that trafficking of cells between the mother and the fetus has functional significance long after the pregnancy is over," said senior author Tippi MacKenzie, MD, assistant professor of pediatric surgery at UCSF and a fetal surgeon at UCSF Benioff Children's Hospital. "This is a topic we are actively studying both in animal models and in patients who have fetal surgery. Practically speaking, this study may allow us to counsel families in which both the mother and father are willing and able to be a donor."

The researchers found that patients with biliary atresia who received a transplanted maternal portion of liver had a failure rate of 3.7 percent, compared to the failure rate of 10.5 percent observed in recipients of paternal livers. In children who had liver transplantation for other diseases, there were no differences in the transplant outcome between maternal or paternal grafts.

The results will be published in the January issue of the American Journal of Transplantation and can be found online at

Contact: Juliana Bunim
juliana.bunim@ucsf.edu
415-502-6397
University of California - San Francisco
Source:Eurekalert

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