This mechanistic review integrates three decades of work into a neuroimmune-metabolic-oxidative framework linking immune activation, tryptophan, iron and lipid metabolism, oxidative stress, and reduced neuroprotection in severe major depression.
Key findings
- The authors propose that acute severe MDD involves immune sensitization, IRS/CIRS imbalance, metabolic syndrome, oxidative stress, reduced reverse cholesterol transport, and inflammatory signaling that may connect periphery and brain. This is multilevel synthesis, not one cohort proving causal order.
Why this matters globally
A systems-biology framework could help subtype heterogeneous depression and motivate biomarker panels rather than single markers if independently validated and shown to add value beyond clinical assessment.
Thai researcher contribution
An author affiliated with Chulalongkorn University and King Chulalongkorn Memorial Hospital linked Thai psychiatry with Chinese, Bulgarian, and Korean systems-biology networks.
Limitations to consider
As a narrative framework it is vulnerable to evidence selection. Biomarkers can be confounded by medication, BMI, smoking, diet, sleep, and severity; peripheral-to-central links may be indirect, and machine learning risks overfitting and batch effects.