Unprecedented study identifies 44 genetic risk factors for major depression

A global research project has mapped out the genetic basis of major depression, identifying 44 genetic variants which are risk factors for depression, 30 of which are newly discovered.

The study, by the Psychiatric Genomics Consortium and co-led in the UK by King’s College London, is the largest study to-date of genetic risk factors for major depression.

Published today in Nature Genetics, the research finds that the genetic basis for major depression is shared with other psychiatric disorders such as schizophrenia, and that all humans carry at least some of the 44 genetic risk factors identified in the study.

A significant number of the genetic variants identified in the study are directly linked to the targets of current antidepressant medications. Analysis of the data also suggests that having higher BMI is linked to an increased risk of major depression.

Previous studies have struggled to identify more than a handful of genetic variants associated with depression. By combining seven separate datasets, the research team included data on more than 135,000 people with major depression and more than 344,000 controls.

The study was an unprecedented global effort by over 200 scientists who work with the Psychiatric Genomics Consortium, and was led by the University of North Carolina School of Medicine and the University of Queensland in Australia. Professor Cathryn Lewis and Dr Gerome Breen of King’s College London led the UK contribution, along with scientists and psychiatrists from the Universities of Edinburgh, Cardiff and UCL.

‘With this study, depression genetics has advanced to the forefront of genetic discovery,’ says Dr Breen from the Institute of Psychiatry, Psychology & Neuroscience (IoPPN) at King’s College London. ‘The new genetic variants discovered have the potential to revitalise depression treatment by opening up avenues for the discovery of new and improved therapies.”

Major depression affects approximately 14% of the global population and is the biggest contributor to long term disability in the general population worldwide. Yet only about half of patients respond well to existing treatments.

‘Depression is an incredibly common disorder that affects millions of people in the UK,’ says Professor Lewis of the IoPPN, who is leading efforts to conduct even larger international studies.

‘This study has shed a bright light on the genetic basis of depression, but it is only the first step,’ added Professor Lewis. ‘We need further research to uncover more of the genetic underpinnings, and to understand how genetics and environmental stressors work together to increase risk of depression.’

In the UK, the work was partly-funded by the National Institute for Health Research (NIHR) Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King’s College London, and the Medical Research Council.

Dr Breen, with other scientists, is currently working on an online tool, for release in the autumn, to allow volunteers with depression to take part in further genetic studies. Members of the public who want to be notified about the launch of the study can email darr@kcl.ac.uk.

NOTES TO EDITORS

Paper reference

‘Genome-wide association analyses identify 44 risk variants and refine the genetic architecture

of major depression’, Wray et al, Nature Genetics, DOI: 10.1038/s41588-018-0090-3

http://dx.doi.org/10.1038/s41588-018-0090-3

Contact

For further media information please contact: Robin Bisson, Senior Press Officer, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, robin.bisson@kcl.ac.uk / +44 20 7848 5377 

About the National Institute of Health Research (NIHR)

The National Institute for Health Research (NIHR): improving the health and wealth of the nation through research. Established by the Department of Health and Social Care, the NIHR:

  • funds high quality research to improve health
  • trains and supports health researchers
  • provides world-class research facilities
  • works with the life sciences industry and charities to benefit all
  • involves patients and the public at every step.

For further information, visit the NIHR website www.nihr.ac.uk.

About the Medical Research Council

The Medical Research Council is at the forefront of scientific discovery to improve human health. Founded in 1913 to tackle tuberculosis, the MRC now invests taxpayers’ money in some of the best medical research in the world across every area of health. Thirty-two MRC-funded researchers have won Nobel prizes in a wide range of disciplines, and MRC scientists have been behind such diverse discoveries as vitamins, the structure of DNA and the link between smoking and cancer, as well as achievements such as pioneering the use of randomised controlled trials, the invention of MRI scanning, and the development of a group of antibodies used in the making of some of the most successful drugs ever developed. Today, MRC-funded scientists tackle some of the greatest health problems facing humanity in the 21st century, from the rising tide of chronic diseases associated with ageing to the threats posed by rapidly mutating micro-organisms. www.mrc.ac.uk


Tags: NIHR - Biomarkers & genomics - BioResource - NIHR Maudsley BRC - Publications -

By NIHR Maudsley BRC at 26 Apr 2018, 11:19 AM


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