May 8, 2015
By Medical Discovery News
Diabetes may be common, but it’s serious business. Diabetes is repeatedly in the top 10 causes of death for Americans, killing or contributing to the deaths of 300,000 Americans in 2010. An estimated one in 10 people have it, but about one-third of them are undiagnosed. Diabetes costs the country $250 billion. But scientists are working on some good news for diabetics with the help of stem cells.
Type 1 diabetes is largely associated with children and represents about 5 percent of all diabetes cases. The more common form, type 2 diabetes, mostly affects adults and manifests when cells do not use insulin effectively so higher levels are needed (also called insulin resistance). Insulin is a molecule of protein, made and secreted by beta cells in the pancreas, an organ that regulates glucose levels in the blood.
Diabetes is a multifaceted disease that leads to a host of medical conditions and complications, such as high blood pressure, elevated cholesterol, blindness, cardiovascular disease, and kidney problems. Those with diabetes are two times more likely to die of a heart attack and one and half times more likely to die of a stroke. Diabetes is the leading cause of kidney failure, leading to transplants and dialysis. Almost 60 percent of lower extremity amputations are the result of diabetes.
Administering insulin is a common treatment for the disease and there are many different forms that can be used. Insulin can be injected by a syringe or delivered via an automated pump. There are also different pharmaceuticals used in oral treatments for diabetes. Biomedical scientists are developing other methods to treat diabetes, such as transferring insulin-producing beta cells from a donated pancreas into a diabetic patient. This works well, but the cells stop working over time. Transplanting a whole pancreas is also an option that relieves the need to administer insulin, but there is always a short supply of donated organs and the possibility that the new body will reject it.
However, recent stem cell experiments by multiple groups working independently show promise. These cells, called S7, produce insulin and regulate the level of glucose in the blood and successfully eliminated diabetes in an animal model in about 40 days. Unlike organ transplants, there is no limit to the supply of these stems cells, no long wait for a donation that’s a good fit, and no need for immunosuppressant drugs.
But the method is not perfect. First, S7 cells react slower to glucose than natural beta cells and do not make as much insulin. There are also questions as to whether this approach could be used to treat Type 1 diabetes, because the insulin-producing cells are destroyed in an autoimmune process, which might destroy the transplanted cells as well.
It’s premature to claim this innovation is a victory over diabetes, but its development will definitely be worth following.
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Pamela K. Bond 