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Mitochondrial genome mutates when reprogrammed
Date:7/28/2011

This release is available in German.

Induced pluripotent stem cells (iPS cells) are truly talented multi-taskers. They can reproduce almost all cell types and thus offer great hope in the fight against diseases like Alzheimer's and Parkinson's. However, it would appear that their use is not entirely without risk: during the reprogramming of body cells into iPS cells, disease-causing mutations can creep into the genetic material. The genome of the mitochondria the cell's protein factories is particularly vulnerable to such changes. This phenomenon has been discovered by researchers at the Max Planck Institute for Molecular Genetics in Berlin. The scientists encountered mutations in the mitochondrial genome of iPS cells. Because such genetic mutations can cause diseases, the cells should be tested for such mutations before being used for clinical applications.

A lot of hope is riding on induced pluripotent stem cells (iPS cells). Because they can be generated individually for every single person, they are expected to enable the development of tailor-made therapies that do not run the risk of triggering rejection reactions. iPS cells also offer a promising solution for drug screening, as researchers can generate different cell types such as liver cells from them, on which they can then test the effect of substances. iPS cells can be generated from adult body cells using the technique of "cellular reprogramming". The method raises no ethical concerns as it does not involve the destruction of embryos.

However, these promising cells are also associated with certain risks. Disease-causing mutations can also arise during the reprogramming of the body cells. The genetic material in the mitochondria is particularly vulnerable to changes in the genetic code. The question as to whether such mutations arise as a result of the reprogramming process
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Contact: Dr. James Adjaye
adjaye@molgen.mpg.de
49-308-413-1203
Max-Planck-Gesellschaft
Source:Eurekalert  

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