Nav: Home

Novel study method identifies 15 genomic regions associated with depression

August 01, 2016

A genomic study using a novel method of enrolling participants has identified for the first time 15 regions of the genome that appear to be associated with depression in individuals of European ancestry. Results of the study, which utilized data gathered by the consumer genomics company 23andMe, are receiving advance online publication in Nature Genetics.

"Identifying genes that affect risk for a disease is a first step towards understanding the disease biology itself, which gives us targets to aim for in developing new treatments," says Roy Perlis, MD, MSc, of the Department of Psychiatry and the Center for Human Genetic Research at Massachusetts General Hospital, co-corresponding author of the report. "More generally, finding genes associated with depression should help make clear that this is a brain disease, which we hope will decrease the stigma still associated with these kinds of illnesses."

While it is well known that depression can run in families, most previous genetic studies have been unable to identify variants influencing the risk for depression. One study did find two genomic regions that may contribute to disease risk in Chinese women, but those variants are extremely rare in other ethnic groups. Perlis and his colleagues note that the many different forms in which depression appears and affects patients imply that, as with other psychiatric disorders, it is probably influenced by many genes with effects that could be too subtle to be found in previous, relatively small studies.

Unlike traditional methods of recruiting study participants - which involve seeking and enrolling prospective participants and then conducting comprehensive interviews before actually genotyping each individual - this study utilized data collected from customers of 23andMe, a direct-to-consumer genetic testing company, who consented to participate in research. Participation includes responding to surveys and completing information about medical history, as well as physical and demographic information. 23andMe's researcher platform uses aggregated non-identifying data.

For the current study, the investigators first analyzed common genetic variation using data from more than 300,000 individuals of European ancestry from the 23andMe database, more than 75,000 of whom reported having been diagnosed with or treated for depression and more than 230,000 with no reported history of depression. That analysis identified two genomic regions - one containing a poorly understood gene known to be expressed in the brain and another containing a gene previously associated with epilepsy and intellectual disability - as significantly associated with depression risk.

The research team combined that information with data from a group of smaller genome-wide association studies enrolling around 9,200 individuals with a history of depression and 9,500 controls and then more closely analyzed sites of possible risk genes in samples from another group of 23andMe clients - almost 45,800 with depression and 106,000 controls. The results identified 15 genomic regions, including 17 specific sites, as significantly associated with a diagnosis of depression. Several of these sites are located in or near genes known to be involved in brain development.

"The neurotransmitter-based models we are currently using to treat depression are more than 40 years old, and we really need new treatment targets. We hope that finding these genes will point us toward novel treatment strategies," says Perlis, who is an associate professor of Psychiatry at Harvard Medical School. "Another key takeaway from our study is that the traditional way of doing genetic studies is not the only way that works. Using existing large datasets or biobanks may be far more efficient and may be helpful for other psychiatric disorders, such as anxiety disorders, where traditional approaches also have not been successful."
The co-corresponding authors of the Nature Genetics paper are Ashley Winslow, PhD, Perelman School of Medicine, University of Pennsylvania; and David A. Hinds, PhD, of 23andMe. The lead author is Craig Hyde, PhD, Pfizer Global Research and Development; and additional co-authors are Mike Nagle, PhD, Xing Chen, Sara Paciga, MA, and Jens Wendland, MD, Pfizer Global R&D; and Chao Tian, PhD, and Joyce Tung, PhD, 23andMe. Perlis's work is supported in part by National Institute of Mental Health/National Human Genome Research Institute grant P50 MH106933.

Massachusetts General Hospital, founded in 1811, is the original and largest teaching hospital of Harvard Medical School. The MGH Research Institute ( conducts the largest hospital-based research program in the nation, with an annual research budget of more than $800 million and major research centers in HIV/AIDS, cardiovascular research, cancer, computational and integrative biology, cutaneous biology, human genetics, medical imaging, neurodegenerative disorders, regenerative medicine, reproductive biology, systems biology, photomedicine and transplantation biology. The MGH topped the 2015 Nature Index list of health care organizations publishing in leading scientific journals, earned the prestigious 2015 Foster G. McGaw Prize for Excellence in Community Service and returned to the number one spot on the 2015-16 U.S. News & World Report list of "America's Best Hospitals."

Massachusetts General Hospital

Related Depression Articles:

Tackling depression by changing the way you think
A thought is a thought. It does not reflect reality.
How depression can muddle thinking
Depression is associated with sadness, fatigue and a lack of motivation.
Neuroimaging categorizes 4 depression subtypes
Patients with depression can be categorized into four unique subtypes defined by distinct patterns of abnormal connectivity in the brain, according to new research from Weill Cornell Medicine.
Studies suggest inflammatory cytokines are associated with depression and psychosis, and that anti-cytokine treatment can reduce depression symptoms
Studies presented at this year's International Early Psychosis Association meeting in Milan, Italy, (Oct.
Is depression in parents, grandparents linked to grandchildren's depression?
Having both parents and grandparents with major depressive disorder was associated with higher risk of MDD for grandchildren, which could help identify those who may benefit from early intervention, according to a study published online by JAMA Psychiatry.
Postpartum depression least severe form of depression in mothers
Postpartum depression -- a household term since actress Brooke Shields went public in 2005 about her struggle with it -- is indeed serious.
Tropical Depression 1E dissipates
Tropical Depression 1E or TD1E didn't get far from the time it was born to the time it weakened to a remnant low pressure area along the southwestern coast of Mexico.
Diagnosing depression before it starts
MIT researchers have found that brain scans may identify children who are vulnerable to depression, before symptoms appear.
Men actually recommend getting help for depression
Participants in a national survey read a scenario describing someone who had depressed symptoms.
Depression too often reduced to a checklist of symptoms
How can you tell if someone is depressed? The Diagnostic and Statistical Manual of Mental Disorders (DSM) -- the 'bible' of psychiatry -- diagnoses depression when patients tick off a certain number of symptoms on the DSM checklist.

Related Depression Reading:

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Digital Manipulation
Technology has reshaped our lives in amazing ways. But at what cost? This hour, TED speakers reveal how what we see, read, believe — even how we vote — can be manipulated by the technology we use. Guests include journalist Carole Cadwalladr, consumer advocate Finn Myrstad, writer and marketing professor Scott Galloway, behavioral designer Nir Eyal, and computer graphics researcher Doug Roble.
Now Playing: Science for the People

#530 Why Aren't We Dead Yet?
We only notice our immune systems when they aren't working properly, or when they're under attack. How does our immune system understand what bits of us are us, and what bits are invading germs and viruses? How different are human immune systems from the immune systems of other creatures? And is the immune system so often the target of sketchy medical advice? Those questions and more, this week in our conversation with author Idan Ben-Barak about his book "Why Aren't We Dead Yet?: The Survivor’s Guide to the Immune System".