Investigating NF-κB as a biomarker for suicidal ideation in depression in a pilot case-control study

Area of Science:

• Neuroscience
• Immunology
• Psychiatry

Background:

• Suicidal ideation (SI) is a critical symptom of major depressive disorder (MDD), significantly affecting patient quality of life.
• Neuroinflammation and the role of Toll-like receptors (TLRs) and Nuclear Factor Kappa B (NF-κB) signaling are increasingly linked to depression and SI.
• The complex, bidirectional relationship between inflammation and suicidal behavior warrants further investigation.

Purpose of the Study:

• To investigate the association between NF-κB expression levels and the presence of SI in patients diagnosed with MDD.
• To explore potential differences in NF-κB levels among MDD patients with recent SI, past SI, and no history of SI.

Main Methods:

• A case-control study involving 60 MDD patients stratified into three groups based on SI history (recent, past, none).
• Clinical assessments included Beck Depression Inventory-II (BDI-II) and Hamilton Depression Rating Scale (HDRS).
• Blood NF-κB levels were quantified using a Human NF-κB enzyme-linked immunosorbent assay (ELISA) Kit.

Main Results:

• A weak, inverse association was found between a history of SI and NF-κB blood levels.
• Patients with a history of SI exhibited lower NF-κB levels compared to those without a history of SI.

Conclusions:

• Depressed patients experiencing SI may exhibit impaired NF-κB expression.
• Decreased blood NF-κB levels could potentially serve as a biomarker for predicting SI in MDD patients.