WHO rejects claims to issue a statement on existence of Ebola in Tanzania.
A new study has found that people living with major depressive disorder are biologically older than people without depression, and that childhood trauma exacerbates this effect. The results illuminate the epigenetic mechanisms that might explain this discrepancy.
Major depression is one of the most common mental health problems in the United States.
In fact, more than 16 million adults will have had at least one major depressive episode during the past year.
The condition has been linked to various other adverse outcomes, from a shorter lifespan to a higher risk of cardiovascular problems.
New research shows that major depression may also mean premature aging. Scientists led by Laura Han — from the Amsterdam University Medical Center in the Netherlands — studied the DNA structure of people with depression and made an intriguing discovery.
The researchers presented their findings at the European College of Neuropsychopharmacology conference, held in Barcelona, Spain, and they published their study in the American Journal of Psychiatry.
This effect of premature aging was more significant in people who had had adverse childhood experiences, such as violence, trauma, neglect, or abuse.
In the U.S., almost 35 million children have experienced some form of trauma, according to a national survey. That is almost half of the nation’s child population.
Studying how depression affects DNA
Han and colleagues examined the DNA of 811 people with depression and 319 people without. The participants were enrolled in the Netherlands Study of Depression and Anxiety.
Epigenetics is the study of the changes in gene expression that do not affect the DNA sequence. Such changes can occur as a result of many factors, including environment and lifestyle.
One of the mechanisms through which epigenetic change occurs is called DNA methylation — that is, when a methyl group is transferred and added to the DNA.
Overall, the scientists saw that people with major depressive disorder had a degree of methylation and epigenetic change that was indicative of an older age. More specifically, this means that those with depression were biologically older, by 8 months, than people without depression.
In some severe depression cases, this biological age was 10–15 years older than the chronological age.
The researchers replicated their findings by examining brain tissue samples.
FOLLOW US ON:
‘Epigenetic clock runs faster’ in depression
Han comments on their findings, saying, “The fact that we saw similar results in both blood samples and postmortem brain tissue helps support the belief that this is a real effect we are seeing.”
“This work shows,” she explains, “that methylation levels at specific loci increase and decrease with age, and so this pattern of methylation is a good indicator of biological age. This difference becomes more apparent with increasing age, especially once people move into their 50s and 60s.”
The results highlight the biological effect of early-life trauma and the importance of early preventive and therapeutic measures when it comes to depression and adverse childhood experiences.
However, she also points out that more research is needed to strengthen the findings. “Of course,” she says, “these are associations, so we need long-term linked studies (longitudinal studies) to be able to draw any conclusions whether the trauma causes the epigenetic aging.”
TO DOWNLOAD OUR MOBILE NEWS APP CLICK HERE
Tanzania: officials summons WHO over Ebola claims
Tanzania’s government has summoned the World Health Organisation’s local representative over claims that they’re concealing information on Ebola virus infections in the country.
On Saturday, WHO said in a statement that it had learned of one suspected fatal case in the main city, Dar es Salaam, and two other infections but, despite repeated requests, was given no information.
Last week, Tanzania said it had no confirmed or suspected cases of Ebola.
Government spokesman Hassan Abbasi said on Twitter that the ministry of foreign affairs had summoned the WHO’s Tigest Ketsela Mengestu to obtain “in-depth details from the agency on reports circulating in the media”.
A short video clip has also been posted on the ministry’s Twitter account, showing Dr Tigest clarifying at a meeting with Deputy Minister for Foreign Affairs Damas Ndumbaro that the WHO did not say there was Ebola in Tanzania:
Social embed from twitter
Report this social embed, make a complaint
More than 2,100 people have died during the current Ebola outbreak in neighbouring Democratic Republic of Congo.
@ Anttention Fresh,
We work hard to ensure that any news brought to you is legitimate and valuable so we leave out the noise. This material, and other digital content on this website, may be reproduced, published, broadcast, rewritten or redistributed in whole or in part BUT give us credit as your source.