a complex relationship between suicide, dementia, and amyloid: a narrative review

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ID: 220674
2018
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Abstract
Background: Suicide rates are high among older adults and many conditions have been related to suicide in this population: chronic illnesses, physical disabilities, cancer, social isolation, mental disorders and neurocognitive disorders.Objectives: Among neurocognitive disorders, analysis of the relationships between dementia and suicidal behaviors led to conflicting results and some questions are still without answer. Particularly, it is not known whether (i) Alzheimer's disease (AD) increases the risk of suicidal ideation and suicide attempts (SA) or the frequency of death by suicide; (ii) the presence of suicidal ideation or SA in people older than 65 years of age is an early dementia sign; and (iii) amyloid load in frontal areas facilitates SA by modifying the decision-making pathway.Methods: Therefore, in this narrative review, we searched the PubMed database using the medical subject heading (MeSH) terms (“Suicide” AND “Depression”) OR (“Amyloid” OR “Dementia”) to identify recent (from 2000 to 2017) original studies on the links between suicidal behavior, dementia and brain amyloid load. We also explored the clinical and pathophysiological role of depression in these relationships.Results and Discussion: The findings from these studies suggest that late stage dementia could protect against suicidal ideation and SA. Conversely, the risk of complete suicide is increased during the early phase of cognitive decline.Conclusions: Serious cognitive impairment and decline of executive functions could protect against negative thoughts related to cognitive disability awareness and against suicide planning.Several factors, including brain amyloid load, could be involved in the increased suicide rate early after the diagnosis of dementia.
Reference Key
conejero2018frontiersa Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Ismael Conejero;Ismael Conejero;Ismael Conejero;Sophie Navucet;Jacques Keller;Emilie Olié;Emilie Olié;Philippe Courtet;Philippe Courtet;Audrey Gabelle;Audrey Gabelle
Journal Journal of enzyme inhibition and medicinal chemistry
Year 2018
DOI
10.3389/fnins.2018.00371
URL
https://www.frontiersin.org/article/10.3389/fnins.2018.00371/full
Keywords
suicide decision-making amyloid neuropsychiatry biological psychiatry depressionneurosciences

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