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Depression speeds up brain aging, find psychologists  

Depression speeds up brain aging, find psychologists   

Psychologists have found a link between depression and an acceleration of the rate at which the brain ages

 

Psychologists at the University of Sussex have found a link between depression and an acceleration of the rate at which the brain ages.

Although scientists have previously reported that people with depression or anxiety have an increased risk of dementia in later life, this is the first study that provides comprehensive evidence for the effect of depression on the decline in overall cognitive function (also referred to as cognitive state), in a general population.

For the study, published today, Thursday 24 May 2018, in the journal Psychological Medicine, researchers conducted a robust systematic review of 34 longitudinal studies, with the focus on the link between depression or anxiety and decline in cognitive function over time.

Evidence from more than 71,000 participants was combined and reviewed. Including people who presented with symptoms of depression as well as those that were diagnosed as clinically depressed, the study looked at the rate of decline of overall cognitive state -- encompassing memory loss, executive function (such as decision making) and information processing speed -- in older adults.

Importantly, any studies of participants who were diagnosed with dementia at the start of the study were excluded from the analysis. This was done in order to assess more broadly the impact of depression on cognitive ageing in the general population.

 

The study found that people with depression experienced a greater decline in the cognitive state in older adulthood than those without depression.

 

As there is a long pre-clinical period of several decades before dementia may be diagnosed, the findings are important for early interventions as currently there is no cure for the disease.

Lead authors of the paper, Dr Darya Gaysina and Amber John from the EDGE (Environment, Development, Genetics and Epigenetics in Psychology and Psychiatry) Lab at the University of Sussex, are calling for greater awareness of the importance of supporting mental health to protect brain health in later life.

Dr Gaysina, a Lecturer in Psychology and EDGE Lab Lead, comments: "This study is of great importance -- our populations are ageing at a rapid rate and the number of people living with decreasing cognitive abilities and dementia is expected to grow substantially over the next thirty years.

 

"Our findings should give the government even more reason to take mental health issues seriously and to ensure that health provisions are properly resourced.

We need to protect the mental wellbeing of our older adults and to provide robust support services to those experiencing depression and anxiety in order to safeguard brain function in later life."

 

Researcher Amber John, who carried out this research for her PhD at the University of Sussex adds:

"Depression is a common mental health problem -- each year, at least 1 in 5 people in the UK experience symptoms. But people living with depression shouldn't despair -- it's not inevitable that you will see a greater decline in cognitive abilities and taking preventative measures such as exercising, practicing mindfulness and undertaking recommended therapeutic treatments, such as Cognitive Behaviour Therapy, have all been shown to be helpful in supporting well-being, which in turn may help to protect cognitive health in older age."

 


 

References:

  1. John, U. Patel, J. Rusted, M. Richards, D. Gaysina. Affective problems and decline in cognitive state in older adults: a systematic review and meta-analysisPsychological Medicine, 2018; 1 DOI: 10.1017/S0033291718001137
  2. University of Sussex. "Depression speeds up brain aging, find psychologists: Psychologists have found a link between depression and an acceleration of the rate at which the brain ages." ScienceDaily, 24 May 2018. <www.sciencedaily.com/releases/2018/05/180524081735.htm>.
  3. The research paper, 'Affective problems and decline in cognitive state in older adults' will be available at: https:// doi.org/10.1017/S0033291718001137 from Thursday 24 May 2018.
  4. Dialogues Clin Neurosci. 2013 Mar; 15(1): 53–65. PMCID: PMC3622469. PMID: 23576889. Molecular aging of the brain, neuroplasticity, and vulnerability to depression and other brain-related disorders. Etienne Sibille, PhD *
  5. Am J Geriatr Psychiatry. 2013 May;21(5):450-60. doi: 10.1016/j.jagp.2013.01.040. Epub 2013 Feb 6. Anticipated brain molecular aging in major depression. Douillard-Guilloux G1, Guilloux JP, Lewis DA, Sibille E.
  6. Adina Zeki Al Hazzouri, Michelle R. Caunca, Juan Carlos Nobrega, Tali Elfassy, Ying Kuen Cheung, Noam Alperin, Chuanhui Dong, Mitchell S.V. Elkind, Ralph L. Sacco, Charles DeCarli, Clinton B. Wright. Greater depressive symptoms, cognition, and markers of brain aging. Neurology, 2018; DOI: 10.1212/WNL.0000000000005639
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