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New technology detect cellular memory
Date:2/24/2014

Cells in our body are constantly dividing to maintain our body functions. At each division, our DNA code and a whole machinery of supporting components has to be faithfully duplicated to maintain the cell's memory of its own identity. Researchers at BRIC, University of Copenhagen, have developed a new technology that has revealed the dynamic events of this duplication process and the secrets of cellular memory. The results are published in Nature Cell Biology.

In 2009, two women at BRIC, University of Copenhagen joined forces to develop a new technology that could elucidate the mystery behind cellular memory. Today, they are celebrating their first big discovery using this technology.

"Our technology can isolate the small molecular building blocks that bind to our DNA strand and organize it into a stringent architecture. Importantly, our technology can follow the dynamic duplication processes in our cells and can therefore reveal the life cycle of these DNA-complexes", says postdoc Constance Alabert who has been leading the laboratory work.

The molecular building blocks that our DNA is wrapped around are called histones and together, the DNA strand and the histones form a stringent structure called chromatin. When our cells divide during development and throughout life to maintain our body functions, the DNA code has to be faithfully duplicated and so do the chromatin and its architecture. Chromatin contains crucial information that tells our genes when to be active and when to be silent. For example, information stored in the chromatin silence liver specific genes in heart cells and vice versa. Therefore, the entire chromatin structure has to be duplicated at each cell division to maintain a cell's memory of its own identity.

It is no longer debated that the chromatin structure is crucial to maintain cell identity, but the how remains. As only hypothesis driven approaches has been available to study the dynamic ev
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Contact: Katrine Sonne-Hansen
katrine.sonne@bric.ku.dk
45-35-32-56-48
University of Copenhagen
Source:Eurekalert  

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