2-year-old girl gets windpipe made from stem cells

CHICAGO — A 2-year-old girl born without a windpipe now has a new one grown from her own stem cells, the youngest patient in the world to benefit from the experimental treatment.

Hannah Warren has been unable to breathe, eat, drink or swallow on her own since she was born in South Korea in 2010. Until the operation at a central Illinois hospital, she had spent her entire life in a hospital in Seoul. Doctors there told her parents there was no hope and they expected her to die.

The stem cells came from Hannah’s bone marrow, extracted with a special needle inserted into her hip bone. They were seeded in a lab onto a plastic scaffold, where it took less than a week for them to multiply and create a new windpipe.

About the size of a 3-inch tube of penne pasta, it was implanted April 9 in a nine-hour procedure.

Early signs indicate the windpipe is working, Hannah’s doctors announced Tuesday, although she is still on a ventilator. They believe she will eventually be able to live at home and lead a normal life.

“We feel like she’s reborn,” said Hannah’s father, Darryl Warren.

“They hope that she can do everything that a normal child can do but it’s going to take time. This is a brand new road that all of us are on,” he said in a telephone interview. “This is her only chance but she’s got a fantastic one and an unbelievable one.”

Only about one in 50,000 children worldwide are born with the same defect. The stem-cell technique has been used to make other body parts besides windpipes and holds promise for treating other birth defects and childhood diseases, her doctors said.

The operation brought together an Italian surgeon based in Sweden who pioneered the technique, a pediatric surgeon at Children’s Hospital of Illinois in Peoria who met Hannah’s family while on a business trip to South Korea, and Hannah — born to a Newfoundland man and Korean woman who married after he moved to that country to teach English.

Hannah’s parents had read about Dr. Paolo Macchiarini’s success using stem-cell based tracheas but couldn’t afford to pay for the operation at his center, the Karolinska Institute in Stockholm. So Dr. Mark Holterman helped the family arrange to have the procedure at his Peoria hospital, bringing in Macchiarini to lead the operation. Children’s Hospital waived the cost, likely hundreds of thousands of dollars, Holterman said.

Part of OSF Saint Francis Medical Center, the Roman Catholic hospital considers the operation part of their mission to provide charity care, but also views it as a way to champion a type of stem-cell therapy that doesn’t involve human embryos, the surgeons said. The Catholic church opposes using stem cells derived from human embryos in research or treatment.

Macchiarini has been involved in 14 previous windpipe operations using patients’ own stem cells — five using man-made scaffolds like Hannah’s but in adults; and nine using scaffolds made from cadaver windpipes, including one in a 10-year-old British boy.

He said only one patient died, a 30-year-old man from Abingdon, Md., who had the operation in November 2011 to treat late-stage cancer of the windpipe. He died in March 2012 of uncertain causes, Macchiarini said.

Similar methods have been used to grow bladders, urethras and last year a girl in Sweden got a lab-made vein using her own stem cells and a cadaver vein.

Scientists hope to eventually use the method to create solid organs, including kidneys and livers, said Dr. Anthony Atala, director of Wake Forest University’s Institute for Regenerative Medicine. He said the operation on Hannah Warren “is really showing that the technique is workable.”

Hannah had breathing difficulties at birth and Korean doctors soon discovered the missing windpipe. They reconfigured her esophagus so that a breathing tube could go down it from her mouth to her lungs. The esophagus normally runs behind the windpipe and carries food to the stomach.

Korean doctors said she couldn’t live long with the tube and told her parents there was nothing more they could do.

Hannah outlived their expectations and has thrived despite the grim prognosis and other abnormalities including an undeveloped voice box that prevented her from speaking. Now that she has a windpipe and can breathe more normally, doctors expect the larynx to grow and function normally. She will work with speech therapists to help her learn to talk.

Holterman said Hannah will likely need a new windpipe in about five years, as she grows.

She breathes with help from a ventilator but no longer has a tube in her mouth that she’d lived with since shortly after birth, Holterman said. She’s not yet able to eat normally, but doctors let her have her first taste ever of food — a few licks on a lollipop. Her father said she already has discriminating taste and prefers chocolate Korean lollipops to the American kind.

“I asked her, ‘Is it good,’” he said, “and she immediately nodded her head.”

———

AP Medical Writer Lindsey Tanner can be reached at http://www.twitter.com/LindseyTanner

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