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DNA modifications measured in blood signal related changes in the brain

Researchers say they have confirmed suspicions that DNA modifications found in the blood of mice exposed to high levels of stress hormone ? and showing signs of anxiety ? are directly related to changes found in their brain tissues. Scientists say this research offers the first evidence that epigenetic changes that alter the way genes function without changing their underlying DNA sequence -- and are detectable in blood -- mirror alterations in brain tissue linked to underlying psychiatric diseases.
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