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    A step closer to a cure for adult-onset diabetes

    Written by Anjali Nimesh Nimesh Published On 2017-12-29T19:20:02+05:30  |  Updated On 29 Dec 2017 7:20 PM IST
    A step closer to a cure for adult-onset diabetes

    In healthy people, exosomes - tiny structures secreted by cells to allow intercellular communication - prevent clumping of the protein that leads to type 2 diabetes. Exosomes in patients with the disease don't have the same ability. This discovery by a research collaboration between the Chalmers University of Technology and AstraZeneca takes us a step closer to a cure for type 2 diabetes.


    Proteins are the body's workhorses, carrying out all the tasks in our cells. A protein is a long chain of amino acids that must be folded into a specific three-dimensional structure to work. Sometimes, however, they behave incorrectly and aggregate - clump together - into long fibres called amyloids, which can cause diseases. It was previously known that type 2 diabetes is caused by a protein aggregating in the pancreas.


    "What we've found is that exosomes secreted by the cells in the pancreas stop that process in healthy people and protect them from type 2 diabetes, while the exosomes of diabetes patients do not," says Professor Pernilla Wittung Stafshede, who headed the study whose results were recently published in the Proceedings of the National Academy of Sciences, PNAS.


    What we know now is that "healthy" exosomes bind the protein that causes diabetes on the outside, preventing it from aggregating; however, the results do not explain why. We also don't know if type 2 diabetes is caused by "sick" exosomes or if the disease itself causes them to malfunction.


    "The next step is to make controlled models of the exosomes, whose membranes contain lipids and proteins, to understand exactly what component affects the diabetes protein. If we can find which lipid or protein in the exosome membrane leads to that effect, and can work out the mechanism, then we'll have a good target for development of treatment for type 2 diabetes."


    The study is actually a part of industrial doctoral student Diana Ribeiro's thesis work, and a collaboration between Chalmers and Astrazeneca.


    "She came up with the idea for the project herself," says Wittung Stafshede, who is also Ribeiro's academic advisor at Chalmers. "She had done some research on exosomes before and I had read a bit about their potential. It's a fairly new and unexplored field, and honestly I didn't think the experiments would work. Diana had access to pancreatic cells through Astrazeneca - something we'd never had access to before - and she conducted the studies very thoroughly, and this led us to our discovery."


    This is the first time that Wittung Stafshede has worked with Astrazeneca.


    "We ought to collaborate more. It's beneficial to them to understand what molecular experiments we can carry out, and it's valuable for us to be able to put our research into a wider medical-clinical perspective. In the search for a future cure for type 2 diabetes, it's also good for us to already be working with a pharmaceutical company."


    For more details click on the link: http://dx.doi.org/10.1073/pnas.1711389114

    diabetesjournal Proceedings of the National Academy of SciencesPNASProceedings of the National Academy of SciencesType-2 diabetes
    Source : Eureka Alert

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    Anjali Nimesh Nimesh
    Anjali Nimesh Nimesh
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