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Researchers discover first gene linked to missing spleen in newborns
Date:5/3/2012

NEW YORK (May 3, 2012) -- Researchers at Weill Cornell Medical College and Rockefeller University have identified the first gene to be linked to a rare condition in which babies are born without a spleen, putting those children at risk of dying from infections they cannot defend themselves against. The gene, Nkx2.5, was shown to regulate genesis of the spleen during early development in mice.

The study, published online May 3 in Developmental Cell, raises the hope that a simple genetic screening test for Nkx2.5 mutations can be developed that will alert parents that their developing child may be missing the organ, which could then be confirmed with a diagnostic scan.

"The great news is that with the appropriate preventive antibiotic treatment these children will not succumb to fatal infections. This test could potentially save lives," says the study's lead investigator, Dr. Licia Selleri, an associate professor in the Department of Cell and Developmental Biology at Weill Cornell Medical College.

Because defense against infections depends, in part, on the spleen, children known to be born without the organ require treatment with a regimen of antibiotic therapy throughout their lives. But most diagnoses of this condition, congenital asplenia, are made during an autopsy after a child dies, suddenly and unexpectedly, from a rapidly lethal infection, usually from bacteria that causes pneumonia or meningitis, Dr. Selleri says. "For those reasons, we believe this condition is not quite as rare as believed. Not every child who dies from an infection is given an autopsy."

Long search for genetic culprits

Patients with congenital asplenia usually lack a spleen as the sole abnormality, but sometimes have abnormalities of the heart and blood vessels. The majority of those cases arise sporadically, so are not believed to be inherited. One form of this disorder is known as Isolated Congenital Asplenia (ICA), charac
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Contact: Lauren Woods
law2014@med.cornell.edu
212-821-0560
New York- Presbyterian Hospital/Weill Cornell Medical Center/Weill Cornell Medical College
Source:Eurekalert

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