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Stem cell breakthrough offers diabetes hope
Date:4/3/2008

Scientists have discovered a new technique for turning embryonic stem cells into insulin-producing pancreatic tissue in what could prove a significant breakthrough in the quest to find new treatments for diabetes.

The University of Manchester team, working with colleagues at the University of Sheffield, were able to genetically manipulate the stem cells so that they produced an important protein known as a transcription factor.

Stem cells have the ability to become any type of cell, so scientists believe they may hold the key to treating a number of diseases including Alzheimers, Parkinsons and diabetes.

However, a major stumbling block to developing new treatments has been the difficulty scientists have faced ensuring the stem cells turn into the type of cell required for any particular condition in the case of diabetes, pancreatic cells.

Unprompted, the majority of stem cells turn into simple nerve cells called neurons, explained Dr Karen Cosgrove, who led the team in Manchesters Faculty of Life Sciences.

Less than one per cent of embryonic stem cells would normally become insulin-producing pancreatic cells, so the challenge has been to find a way of producing much greater quantities of these cells.

The pancreas contains different types of specialised cells exocrine cells, which produce enzymes to aid digestion, and endocrine cells, including beta cells, which produce the hormone insulin to regulate the blood glucose levels. Diabetes results when there is not enough insulin to meet the bodys demands.

There are two forms of the disease: type-1 diabetes is due to not enough insulin being produced by the pancreas, while type-2 or adult-onset diabetes occurs when the body fails to respond properly to the insulin that is produced.

The team found that the transcription factor PAX4 encouraged high numbers of embryonic stem cells about 20% to become pancreatic beta cells with the potential to
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Contact: Aeron Haworth
aeron.haworth@manchester.ac.uk
44-161-275-8383
University of Manchester
Source:Eurekalert

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