Suicide epigenetics, a review of recent progress

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Suicide is a global public health crisis, causing over 800,000 deaths annually.
• Suicidal behavior arises from a complex interplay between genetic predispositions and environmental factors.
• Epigenetic mechanisms, including DNA methylation, miRNA, and histone modifications, offer insights into this complex interaction.

Purpose of the Study:

• To review the scientific literature on the epigenetics of suicide over the last decade.
• To synthesize current understanding of epigenetic factors contributing to suicidal behavior.

Main Methods:

• Systematic review of research published in the past 10 years.
• Analysis of studies investigating epigenetic modifications in relation to suicide.

Main Results:

• Significant advancements have been made in suicide epigenetics research.
• Emerging findings highlight the role of brain-derived neurotrophic factor (BDNF) and hypothalamic-pituitary-adrenal (HPA) axis genes.
• Epigenetic alterations in these key genes are increasingly linked to suicidal behavior.

Conclusions:

• Further research requires the study of specific patient subgroups to achieve comparable and reproducible epigenetic findings.
• Incorporating an individual's past history, including early-life adversity and psychiatric disorders, is essential for epigenetic studies of suicidality.