US doctors say they have saved a seven-year-old girl who was close to dying from leukaemia by pioneering the use of a modified form of the HIV virus.
After fighting her disease with chemotherapy for almost two years and suffering two relapses, the young girl “faced grim prospects”, doctors at Children’s Hospital of Philadelphia said.
So in February they agreed to take her on in an experimental programme that fought fire with fire.
Helped by a genetically altered HIV virus — stripped of its devastating properties that cause Aids — doctors turned the girl’s own immune cells into a superior force able to rout the “aggressive” leukaemia.
Emily Whitehead was the first child and is one of only a handful of people in total to be given what’s officially known as CTL019 therapy. The hospital stressed this could not yet be called “a magic bullet”. However in her case at least the success was dramatic.
First, millions of the girl’s natural immune system cells were removed. Then the modified HIV virus was used to carry in a new gene that would boost the immune cells and help them spot, then attack cancer cells that had previously been able to sneak in “under the radar”, the hospital said.
Finally the rebooted immune cells were sent back in to do their work.
I'm happy for the Lil girl Emily Whitehead but I wonder why all citizens can't get accurate treatment that works— Sim Griffey Jr. (@SimCity24) December 12, 2012
Paediatric oncologist Stephan Grupp, who cared for the girl, explained there was never any danger of Aids during the process.
“The way we get the new gene into the T cells (immune cells) is by using a virus. This virus was developed from the HIV virus, however all of the parts of the HIV virus that can cause disease are removed,” he said. “It is impossible to catch HIV or any other infection. What’s left is the property of the HIV virus that allows it to put new genes into cells.”
During the treatment, Emily became very ill and went into the intensive care unit, underlining how risky the procedure can be. However, drugs that partly block the immune reaction were administered, without interfering with the anti-leukaemia action, and she recovered, the hospital said.
The result was “complete” and best of all, the doctors say, the boosted immune shield continues “to remain in the patient’s body to protect against a recurrence of the cancer”.
“She has no leukaemia in her body for any test that we can do — even the most sensitive tests,” Grupp said.
Emily’s parents Kari and Tom said the operation has changed their world as Emily is now back in school.
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