Doctors treating a critically ill boy with a devastating skin disease used experimental gene therapy to create an entirely new skin for most of his body in a desperate attempt to save his life.
Two years later, the doctors report the boy is doing so well that he does not need any medication, is back in school and even playing soccer.
“We were forced to do something dramatic because this kid was dying,” said Michele de Luca of the University of Modena in Italy, who got a call for help from the German doctors treating the boy.
The boy, then seven, was hospitalized in June 2015 with blisters on his limbs, back and elsewhere.
He quickly lost about 60 percent of the outer layer of his skin and was put into an induced coma to spare him further suffering.
Doctors at the Children’s Hospital at Ruhr University in Bochum, Germany, tried skin grafts from his father and donor skin, but all failed.
“He was in severe pain and asking a lot of questions,” the boy’s father said in a video provided by the hospital “Why do I suffer from this disease? Why do I have to live this life? All children can run around and play, why am I not allowed to play soccer? I couldn’t answer these questions.”
The boy’s parents asked about experimental treatments, and De Luca and his colleagues were contacted.
They had previously used gene therapy to produce a small piece of skin in a similar case.
They told the family that the boy’s precarious state meant that he might not survive the complicated surgeries needed to save him.
“It was a tough decision for us, but we wanted to try for [our son],” the boy’s father said.
The family asked that their names not be used to protect the boy’s privacy.
The boy had a rare, incurable skin disease called junctional epidermolysis bullosa, caused by genetic mutations.
People with the disease lack critical proteins that attach the outer layer of the skin to the inner layer, resulting in fragile skin with almost constant blisters and open sores.
To fix that, the doctors took a small piece of the boy’s skin from an area that was in good condition.
In the laboratory, they added a normal version of his bad gene to his skin cells. They grew sheets of the boy’s skin, in much the same way skin grafts are grown for burn victims.
In total, they grew close to a square meter of skin.
The laboratory-grown skin was then transplanted onto the boy in three operations, ultimately covering 80 percent of his body.
Ten days later, the new skin was already beginning to grow, De Luca said.
After eight months, the doctors said that nearly all of the boy’s skin had been generated by the modified stem cells.
So far, no problems have been detected.
De Luca said the boy would be monitored closely for skin cancer and other potential issues.
“This kid is back to his normal life again,” one of the doctors, Tobias Rothoeft, said on Wednesday. “That’s what we dreamed of doing and it was possible.”
Details of the case were published in the journal Nature on Wednesday.
“This takes us a huge step forward,” said Peter Marinkovich of Stanford University School of Medicine, who has done related work.
He said it was impressive that De Luca and his colleagues were able to make such large amounts of viable skin after correcting the genetic defect, but he noted the approach might not help in more serious cases, which often have tricky complications, like skin blistering in the lungs.
Marinkovich said many patients do not survive beyond age two and that using the treatment for babies could be even riskier.
Holm Schneider of University Hospital Erlangen in Germany said that some severely ill patients might have an extreme reaction to skin transplants with an added gene.
“The immune system might recognize this new gene as something foreign to be attacked and destroyed,” Schneider said.
Still, he said, the approach was worth trying in dying patients.
The boy and his family later visited De Luca and the other Italian doctors involved in his treatment.
“The parents are very grateful and say their life has completely changed,” De Luca said, recalling how the boy spontaneously began taking off his clothes. “The boy was so happy with his new skin that he wanted to show it off.”
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