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Final chapter to 60-year-old blood group mystery
Date:4/7/2013

Researchers have uncovered the gene at the root of a human blood group that has remained a mystery for the past 60 years. They showed that a genetic deletion on this gene is responsible for the lack of this blood group in some people.

With the discovery of the gene behind the Vel blood group, medical scientists can now develop a more reliable DNA test to identify people who lack this group. This will reduce the risk of severe, and sometimes life threatening, destruction of the Vel-positive donor red blood cells in patients with antibodies against Vel.

The genetic basis of nearly all 34 blood group systems has been resolved over the past century, but identification of the underlying gene of the Vel blood group has withstood persistent attempts since it was first identified 60 years ago. It is estimated that one in 5000 people are Vel-negative, and routine blood transfusions for patients with antibodies against Vel can lead to kidney failure and even death.

"This is really exciting as it shows how the power of modern genomics technologies can directly benefit patient care," says Professor Willem Ouwehand , who heads one of the NHS Blood and Transplant research teams at both the University of Cambridge and the Wellcome Trust Sanger Institute. "This is also a milestone in blood group genetics and the end of long and astounding journey of discoveries in blood group genetics which started with Landsteiner from Austria and Fisher, Coombs and Morgan from England."

The discovery by the team would not have been possible without the colleagues from the blood transfusion services of Denmark, England and the Netherlands who undertook the Herculean effort of identifying the 65 individuals that lacked the Vel blood group by testing the red blood cells from nearly 350,000 donors with antibodies against Vel.

They then sequenced the coding fraction of the genomes of five donors who lack the Vel group to identify the underlying gene.'/>"/>

Contact: Aileen Sheehy
press.office@sanger.ac.uk
44-012-234-96928
Wellcome Trust Sanger Institute
Source:Eurekalert

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