Family Races to Fund Cure for Daughter's Deadly Disease

PHOTO: Eliza ONeills father googled "how to make a viral video" to kick start the familys Saving Eliza campaign and raise money toward a clinical trial.
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When 4-year-old Eliza O’Neill has a bad night’s sleep or stutters, her parents try not to panic.

Is it normal kid stuff or is it the first sign that Eliza is about to start the downward spiral of her terminal genetic disease?

“We watch every little thing,” her mother, Dr. Cara O’Neill, told ABCNews.com.

Eliza was diagnosed in July with Sanfilippo syndrome, a genetic disorder that means she lacks an enzyme to break down heparin sulfate, which naturally occurs in cells, causing it to build up over time. This buildup renders cells unable to function properly and can affect everything from sleep to speech to movement.

“It’s headed toward suffering,” her father, Glenn O’Neill, of Columbia, South Carolina, said in a fundraising video for Sanfilippo research. “It’s headed toward pain for her and as a father, you want to protect your children.”

PHOTO: Sanfilippo syndrome has no obvious physical signs at first, but over time, children lose their ability to speak and walk and develop seizures.
Courtesy ONeill Family
PHOTO: Sanfilippo syndrome has no obvious physical signs at first, but over time, children lose their ability to speak and walk and develop seizures.

The disease affects about 1 in 70,000 live births, said Doug McCarty, a researcher at Nationwide Children’s hospital in Columbus, Ohio, who has been working on a cure with his colleague, Haiyan Fu.

Eliza’s mother, a pediatrician, never dreamed that Eliza would have the rare disorder she studied in medical school. She only decided to test Eliza for it because a former colleague suggested simply ruling out Sanfilippo. They thought her delayed speech was more likely a sign Eliza had a mild form of autism.

“And it was positive,” Cara O’Neill told ABCNews.com. “It was a shock.”

Her husband wasn’t at the doctor’s appointment when Cara O’Neill received the bad news about Eliza’s diagnosis.

“Having heard about the syndrome before through my medical training, I mean I just, that sinking, just pit of your stomach, like, this is really bad,” she says in the fundraising video on the verge of tears. “This is really bad.”

Even though Eliza has the most severe form of Sanfilippo syndrome -- type A -- it’s hard to imagine that the little girl isn’t expected to live far into her teens. She prefers to run rather than walk, bobbing along in a pair of pink sneakers with her long blond hair swooshing behind her. She even plays soccer.

But soon, her parents say, Eliza will lose the ability to speak. She turns 5 in November and all of the children the O’Neills know with this syndrome have stopped speaking at around four and a half.

PHOTO:Researchers at Nationwide Childrens Hospital think they have a possible gene therapy cure, but theyve never tried it in humans. The ONeills are raising money to go toward the first human clinical trial, and they hope that Eliza will be selected.
Courtesy ONeill Family
PHOTO:Researchers at Nationwide Children's Hospital think they have a possible gene therapy cure, but they've never tried it in humans. The O'Neills are raising money to go toward the first human clinical trial, and they hope that Eliza will be selected.

After that, she’ll lose the ability to walk and develop seizures. Most children with Sanfilippo type A don’t live far into their teens.

The O’Neills know it’s a long shot, but they hope McCarty and Fu will find a cure before the end of the year. McCarty and Fu have been working on a cure for about 16 years and have found a gene therapy treatment that works in mice, but they’ve never tried it in a human.

But setting up a clinical trial takes money they don’t have.

That’s where the O’Neills and other Sanfilippo parents come in.

If everything goes according to plan, the first human trial will begin in either late 2014 or early 2015, McCarty said. Six children with Sanfilippo type B and nine children with Sanfilippo type A will get injected with a virus that serves as a vector to deliver new genetic material to their cells, hopefully allowing them to make the enzyme they so desperately need.

“We don’t want the patient families to have unrealistic expectations,” researcher Fu said. “We don’t want to say it’s a cure now because it isn’t a cure until after the trial.”

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