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Functioning Pancreas Successfully Implanted in Patient's Arm to Prevent Diabetes

by VR Sreeraman on September 24, 2008 at 5:11 PM
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 Functioning Pancreas Successfully Implanted in Patient's Arm to Prevent Diabetes

A 55-year-old grandmother is producing insulin on her own after her islet cells were removed from her pancreas and implanted into her forearm a few weeks ago at The Methodist Hospital in Houston.

After surgeons removed Wanda Prouty's pancreas, they implanted the islet cells into her left arm to help prevent brittle diabetes that often occurs after this surgery. This is the first time this has been done in North America, and early results are very promising.


Prouty is still taking a small amount of insulin while the transplanted cells are given time to become fully functional.

Islets, small clusters of cells that produce insulin to regulate blood sugars, reside in the pancreas. With the total removal of the pancreas due to chronic pancreatitis, patients lose all islets and their bodies cannot produce insulin, resulting in an immediate and advanced, "brittle" stage of type I diabetes.

"In the past, patients who had their pancreases removed had to learn to manage the resulting brittle diabetes, which comes with a 25 percent death rate over five years," said Dr. Craig Fischer, Methodist surgeon specializing in diseases of the pancreas.

Last month Fischer removed Prouty's pancreas due to painful chronic pancreatitis. From the operating room, the pancreas was brought to The Methodist Hospital's islet lab, where the islets were extracted, then Dr. Osama Gaber, head of the transplant division at Methodist, implanted the islets into the patient's arm, where they will function naturally, preventing diabetes altogether. This procedure is called an "autologous" islet transplant because a donor organ is not used, but rather the patient's own islets. Islets are typically injected into a patient's liver, however this patient had indications of slight liver damage prior to surgery, so the arm was chosen as a stronger alternative site for the islets.

"Because The Methodist Hospital opened the region's only islet lab late last year, we can now extract insulin-producing islets from the patient's own damaged pancreas, inject the islets back into the patient, and prevent brittle diabetes for this group of patients," said Dr. Osama Gaber, director of the Methodist islet lab.

The Methodist Hospital opened Houston's first islet laboratory in late 2007 for patients who suffer from diabetes and other pancreatic diseases. Islet transplants—the transplantation of cells that produce insulin from a donor's pancreas into a patient—offer a promising cure for diabetes. The lab is among fewer than 25 like it in the nation, and offers both clinical and research components.

"Islet transplants offer a promising cure for diabetes," Gaber said. "We are thrilled to bring a laboratory for this innovative treatment to Houston."

The islet is an organelle—or miniature organ—made up of thousands of cells and microscopic blood vessels. Islets reside in the pancreas and secrete insulin that is necessary for burning glucose and other sugars in the body. Islet destruction by immune cells or by loss of pancreatic tissue leads to insulin deficiencies and diabetes. Diabetic patients can also develop serious secondary complications including blindness, kidney failure, heart disease and blood vessel disease.

Source: Newswise


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