How Trauma Travels In Our Genes Through Generations – Science Reveals…

Study of Holocaust survivors finds trauma passed on to children’s genes

Helen Thompson | The Guardian

genetic inheritance

New finding is clear example in humans of the theory of epigenetic inheritance: the idea that environmental factors can affect the genes of your children.

Genetic changes stemming from the trauma suffered by Holocaust survivors are capable of being passed on to their children, the clearest sign yet that one person’s life experience can affect subsequent generations.

The conclusion from a research team at New York’s Mount Sinai hospital led by Rachel Yehuda stems from the genetic study of 32 Jewish men and women who had either been interned in a Nazi concentration camp, witnessed or experienced torture or who had had to hide during the second world war.

They also analysed the genes of their children, who are known to have increased likelihood of stress disorders, and compared the results with Jewish families who were living outside of Europe during the war. “The gene changes in the children could only be attributed to Holocaust exposure in the parents,” said Yehuda.
Her team’s work is the clearest example in humans of the transmission of trauma to a child via what is called “epigenetic inheritance” – the idea that environmental influences such as smoking, diet and stress can affect the genes of your children and possibly even grandchildren.

The idea is controversial, as scientific convention states that genes contained in DNA are the only way to transmit biological information between generations. However, our genes are modified by the environment all the time, through chemical tags that attach themselves to our DNA, switching genes on and off. Recent studies suggest that some of these tags might somehow be passed through READ MORE: http://www.theguardian.com/science/2015/aug/21/study-of-holocaust-survivors-finds-trauma-passed-on-to-childrens-genes

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