Brain-derived neurotrophic factor as a suicide factor in mental disorders

Area of Science:

• Neuroscience
• Psychiatry
• Biochemistry

Background:

• Brain-derived neurotrophic factor (BDNF) is crucial for neural plasticity.
• Altered serum BDNF levels are observed in various mental disorders, including suicidal behavior.
• Investigating BDNF as a peripheral marker for suicide risk is essential.

Purpose of the Study:

• To examine the association between serum BDNF levels and suicide behavior.
• To determine if serum BDNF can serve as a peripheral indicator of suicide risk.
• To explore this association in patients with depression, personality disorders (PDs), and adjustment disorders (ADs).

Main Methods:

• 172 patients with recurrent depressive disorder, PD, or AD (ICD-10 criteria) and 60 healthy controls were included.
• Participants were assessed for a history of suicide attempts.
• Serum BDNF levels were quantified using enzyme-linked immunosorbent assay (ELISA).

Main Results:

• Subjects with PD and AD who had attempted suicide showed significantly lower serum BDNF levels compared to those without attempts.
• In PD and AD groups, patients on psychopharmacotherapy had higher serum BDNF levels.
• Logistic regression indicated that both psychopharmacotherapy and serum BDNF levels correlated with suicide attempts in the studied populations.

Conclusions:

• Reduced serum BDNF levels in individuals with PD and AD and a history of suicide attempts suggest BDNF's potential as a marker for suicidal behavior.
• Serum BDNF may be a valuable indicator of suicidal behavior, independent of specific mental disorder diagnoses.
• Further research is warranted to validate BDNF as a reliable biomarker for suicide risk assessment.