Insomnia not in the head, it’s in genes
IF YOU toss and turn at night struggling to nod off, you may think stress is to blame for your whirring brain.
But the real explanation may lie deep within your genetic make-up. A Dutch study has identified seven genes that put people at increased risk of developing sleeplessness.
Their discovery, that a tendency to suffer sleep problems is biological, rather than psychological, is a whole new approach and gives hope to the third of UK adults who have sleep problems.
It means that targeted treatments could be developed, rather than the 10 million prescriptions for sleeping tablets made each year.
The research, by scientists at Vrije University in Amsterdam, was carried out by mapping the DNA of more than 113 000 people from Britain and the Netherlands.
Dismissed
Sleep specialist Professor Eus Van Someren said: “Insomnia is all too often dismissed as being ‘all in your head’.
“Our research brings a new perspective. Insomnia is also in the genes.”
The professor, whose work is published in the Nature Genetics journal, said he hoped the breakthrough would lead to far more research into sleep problems, which he said had been neglected in the past.
“As compared to the severity, prevalence and risks of insomnia, only a few studies targeted its causes,” he said.
The team also discovered there are different genetic mutations linked to sleep for men and women – and if you are female, you are more susceptible to the problem.
They also found a strong genetic overlap with other traits such as anxiety disorders, depression and neuroticism, and low well-being.
Anke Hammerschlag, a PhD student at Vrije University, said: “This is an interesting finding, because these characteristics tend to go hand in hand with insomnia. We now know this is partly due to the shared genetic basis.”
Professor Danielle Posthuma, also at Vrije University, said there were also separate variants for men and women. “This suggests that different biological mechanisms may lead to insomnia in men and women.” – Daily Mail