Kids with Type 1 diabetes get a taste of normal life with 'bionic pancreas'

Baltimore patient, 7, took part in summer trials of promising new device

  • Zara Cheek, a 7-year-old girl with Type I diabetes, participated in a "bionic pancreas" study at a camp in Boston this summer. "I had an excellent time, and I never got homesick," she said. "I can’t wait to go next year."
Zara Cheek, a 7-year-old girl with Type I diabetes, participated… (Lloyd Fox, Baltimore Sun )
September 12, 2014|By Jonathan Pitts | The Baltimore Sun

As 7-year-old Zara Cheek packed her bags for her first sleep-away camp this summer, she found herself looking forward to more than just swimming, going on hikes and eating S'mores for two glorious weeks.

To her, the experience meant a chance to live like a normal kid for a while — and even, quite possibly, to help thousands of others afflicted with the illness that has shaped her life.

Zara, who lives in West Baltimore and started third grade this fall, is one of about 2 million Americans who suffer from Type 1 diabetes, a chronic and potentially lethal disorder of the pancreas that leaves the body unable to make insulin or turn blood sugar into the energy it needs.

Though its causes are unknown, the implications of Type 1 diabetes are well established. Most who have it experience an acute onset, usually before age 30. Symptoms generally include weight loss, increased thirst and a need to urinate frequently. Sufferers must be given artificial insulin.

If left insufficiently treated, Type 1 diabetes can spark dangerous spikes or drops in blood-sugar level and, in the long term, complications as dire as heart failure and stroke.

Unlike Type 2 diabetes, which affects about 27 million Americans and can often be treated purely by diet and exercise, Type 1 diabetes is one of the world's most taxing chronic illnesses to manage.

Diagnosed at age 2, in 2008, Zara — an avid reader with a shock of sun-kindled blond hair — has rarely been separated from the glucose sensor, digital monitor and electronic insulin pump she wears on her belt. Nor have her parents, Daniel Cheek and Suzanne Razaq, been free of the responsibility of monitoring that equipment 24 hours a day and adjusting it as a blizzard of factors evolve, from the amount of exercise Zara plans to take to the amount of stress she's feeling.

"It's an incredibly intense disease to handle, and unfortunately, it's one that never lets up," said Dr. Robert Ratner, chief scientific and medical officer of the American Diabetes Association.

This summer, Zara and her family finally got a chance to take a break.

Razaq, a real estate agent, was surfing the Internet late one night in July when she happened on a website that caught her eye. A Boston University biomedical engineer had spent years developing a system with all the functions of Zara's equipment that, in effect, ran itself.

It had performed well in real-world settings, she read, and the engineer, Ed Damiano, was looking for child volunteers to test it in clinical trials at a summer camp in August.

Called a "bionic pancreas," it included a glucose sensor, a display monitor and a pump that delivered insulin. What made it different was that Damiano had added a "brain" to the system.

Where caregivers must watch a patient's levels, assess the changing conditions of a given day, estimate each dosage size and program the pump to deliver it, Damiano and his team had developed a mathematical algorithm by which a smartphone-sized computer could assess those changing factors, make every calculation on its own, then dispense the appropriate dose, all without the conscious intervention of the patient or caregiver.

Various researchers have been working on developing an artificial pancreas for years, Ratner said. Such a device, he added, ideally will function like "the pancreas Mother Nature made," measuring the body's needs, "squirting" insulin in just the right amount, then shutting off to prevent overdose. About 20 groups around the world are working on such a project.

While Damiano is still in the process of seeking FDA approval, Razaq said she learned his device is approaching that ideal. It still consists of three separate units, not one, but they're about the size of the ones Zara already wears. It also takes glucose readings 288 times a day, tailors the dosage size each time, and delivers it, whether the patient is sleeping, going to class or dribbling a basketball.

The device does nothing to advance a cure — researchers say that outcome could be decades away — but it has the potential, Razaq said, to free sufferers and caregivers alike from having to think about Type 1 diabetes care every waking moment.

The previous summer, she learned, Damiano and fellow researchers, including a medical team from Massachusetts General Hospital, had run a two-week camp for adolescent Type 1 diabetes sufferers at Camp Clara Barton, a retreat and diabetes research center in Oxford, Mass. Attendees wore the device during normal camp activities.

The trial data suggested that the bionic pancreas keeps glucose levels significantly more stable than other available methods.

"The results were good — much, much better than even we anticipated — and the kids seemed to have a great time," said Damiano, whose paper on the project was published in the New England Journal of Medicine in June.

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