Facebook Pixel

My Mom's Eyes and My Grampa's PTSD: Genetic Inheritance of Trauma

By HERWriter
Rate This
Mom's Eyes and Grandfather's PTSD: Genetic Inheritance of Trauma Photographee.eu/Fotolia

Most of us who suffer from anxiety, depression or other disorders may see hints of it in the family tree. There may be stories of distant relatives who, in the age before widespread diagnosis and treatment, were referred to as “eccentric,” or who “had a nervous breakdown.”

On an overnight train trip through Russia, more than one of my Jewish American traveling companions reported having holocaust nightmares induced by the train trip. At the time, I didn’t give much credence to their stories.

However, science is beginning to find evidence that our bodies can inherit memories without altering DNA sequencing.

Victoria Hughes wrote in the journal Nature, “People who were traumatized during the Khmer Rouge genocide in Cambodia tended to have children with depression and anxiety, for example, and children of Australian veterans of the Vietnam War have higher rates of suicide than the general population.” (3)

It is a theory long accepted in the field of psychology, and now there's evidence, that the experiences of grandparents and great-grandparents could possibly result in genetic mutations that affect our behavior today. (2)

Scientists have previously found in research that female rats could change the DNA passed on to their children. (1) New studies show that trauma also affects the genes that male rats pass on. (3)

The root of the genetic inheritance of trauma seems to begin with the molecular processes involved in non-genetic inheritance of behavioral symptoms. (2) Short RNA molecules play a key role. These microRNAs have regulatory functions, such as controlling how many copies of a particular protein are made. (2)

In the study, young mice were exposed to traumatic conditions in early life, and then compared to with non-traumatized mice. The traumatized mice expressed measurably different behaviors, including losing their natural (and protective) aversion to open spaces and bright light. The mice also had depressive behaviors. (2)

Add a Comment2 Comments

EmpowHER Guest

With all respect, the author is seriously contorting and over-simplifying both epigenetics as a field and it's role in PTSD. Articles like this do far more harm than good. You do not "inherit trauma" in the same straight-forward way that you do eye color (which isn't even as simple as the Punnett Square Bb x bb you learned about in HS biology class). Epigenetics has been misunderstood since the days of Lemarck and is only now being looked into in a more well-understood light. Cobbling together two or three sentences about a half dozen nacent studies with no real context or comprehension contributes to public confusion -- as well as ridiculous claims of "I inherited my PTSD from my mother" flooding support groups and agencies that help people who actually been genuinely traumatized.

January 23, 2016 - 8:46am
HERWriter (reply to Anonymous)

Thank you for reading and commenting. I am no geneticist and I hope not to overstate the connection, only report on evidence found in studies with mice, as reported in peer-reviewed journals.

We have a vigilant medical editor whose job is to prevent such overstatements and she is always steering me away from doing as much. I'm sorry if you feel I have misrepresented the science here.

January 23, 2016 - 9:28am
Enter the characters shown in the image.
By submitting this form, you agree to EmpowHER's terms of service and privacy policy
Add a Comment

We value and respect our HERWriters' experiences, but everyone is different. Many of our writers are speaking from personal experience, and what's worked for them may not work for you. Their articles are not a substitute for medical advice, although we hope you can gain knowledge from their insight.

Emotional Health

Get Email Updates

Emotional Health Guide

Have a question? We're here to help. Ask the Community.


Health Newsletter

Receive the latest and greatest in women's health and wellness from EmpowHER - for free!