Harvard scientists have announced a breakthrough that could eventually allow millions of diabetics to shed the yoke of daily insulin injections.
It took over 15 years of trial and error, but researcher Douglas Melton and his team have discovered a method to transform human embryonic stem cells into insulin-producing cells which can then be injected into the pancreas. The discovery has generated a new wave of momentum in the field, with research labs across the country already working to replicate and build upon Meltons results.
I think weve shown the problem can be solved, Melton told National Geographic Thursday.
The researchers developed a 30-day, six-step process that transforms embryonic stem cells into pancreatic beta cells, the same sugar-regulating cells that are destroyed by the immune system of people with type 1 diabetes. The new cells can read the levels of sugars that enter the body after, say, a meal, and secrete the perfect dose of insulin to balance sugar levels.
Other researchers have had some success harvesting beta cells from cadavers and transplanting them into people with diabetes, but this method cant round up enough of those cells to have a lasting effect.
Meltons method produces millions of the insulin-secreting cells, which were then fed through a catheter to the kidney capsules of 37 diabetic mice.
We can cure their diabetes right away in less than 10 days, Melton told NPR.
When the mice were later given glucose injections, 73 percent showed increased levels of human insulin in their bloodstream, indicating that the beta cells were doing their job.
As with many medical breakthroughs, Melton said they are still a few years away from putting this method to work in humans. One of the primary obstacles to overcome is to find a way to mask transplanted cells from an immune system thats out to destroy them.
Excerpt from:
Stem Cell Breakthrough Puts Type 1 Diabetes Cure In Reach
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