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Scripps Research scientists discover a brain cell malfunction in schizophrenia
Date:12/28/2011

ht or wrong configuration. But the balance can shift in ways that can cause or exacerbate disease.

DNA is the guide that cellular machinery uses to construct the countless proteins essential to life. If portions of that guide remain closed when they shouldn't because histones are not acetylated properly, then genes can be effectively turned off when they shouldn't be with any number of detrimental effects. Numerous research groups have found that altered acetylation may be a key factor in other conditions, from neurodegenerative disorders such as Huntington's disease and Parkinson's disease to drug addiction.

A Good Idea

Thomas had been studying the roles of histone acetylation in Huntington's disease and began to wonder whether similar mechanisms of gene regulation might also be important in schizophrenia. In both diseases, past research in the Thomas lab had shown that certain genes in sufferers were much less active than in healthy people. "It occurred to me that we see the same gene alterations, so I thought, 'Hey, let's just try it,'" she said.

Working with lead author Bin Tang, a postdoctoral fellow in her lab, and Brian Dean, an Australian colleague at the University of Melbourne, Thomas obtained post-mortem brain samples from schizophrenic and healthy brains held at medical "Brain Banks" in the United States and Australia. The brains come from either patients who themselves agreed to donate some or all of their bodies for scientific research after death, or from patients whose families agreed to such donations.

A great deal of epigenetic research has focused on chemical alterations to DNA itself. Histone alterations have been much more difficult to study because such research requires that the histones and DNA remain chemically intact. Many researchers feared that these bonds were disrupted in the brain after death. However, Thomas's group was able to develop a technique for maintaining the histone-DNA int
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Contact: Mika Ono
mikaono@scripps.edu
858-784-2052
Scripps Research Institute
Source:Eurekalert  

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