Peripheral innate immune signature links migraine and depression: Identification of PTX3 and HP as shared diagnostic biomarkers.

Researchers have discovered that migraine and depression share common immune system changes in the blood, which could lead to better diagnosis and treatment for both conditions. Scientists analyzed blood samples from people with migraines and major depression, finding 122 genes that behaved similarly in both disorders. They identified two specific proteins—PTX3 and haptoglobin—that could serve as biomarkers to help diagnose these conditions through blood tests. The study revealed that both migraine and depression patients show increased activity in their innate immune system (the body's first-line defense) while their adaptive immune system (which learns to fight specific threats) appears suppressed. Immune cells called neutrophils and monocytes were elevated in both conditions, creating a pattern of inflammation that links these two disorders. The researchers also identified several anti-inflammatory compounds, including natural substances like withaferin A and myricetin, that might help treat both conditions. For acupuncture patients, this research is significant because it confirms what traditional Chinese medicine has long recognized: that seemingly different conditions can share underlying patterns of imbalance. Acupuncture's known anti-inflammatory effects may help address this shared immune dysfunction in patients suffering from both migraines and depression. This study supports using integrative approaches that target common root causes rather than treating each symptom separately. To explore acupuncture for migraine or depression, seek a licensed acupuncturist certified by the National Certification Commission for Acupuncture and Oriental Medicine (NCCAOM).

This transcriptomic study integrated peripheral blood datasets from migraine (PRJEB40032) and major depressive disorder (GSE98793) cohorts, identifying 122 shared differentially expressed genes enriched in innate immune activation pathways. Using machine learning algorithms (LASSO, SVM-RFE), researchers prioritized pentraxin 3 (PTX3) and haptoglobin (HP) as diagnostic biomarkers with variable performance across conditions. Combined biomarker models achieved AUCs of 0.938 (migraine training) and 0.775 (MDD validation). CIBERSORT immune deconvolution revealed elevated neutrophils and monocytes in both disorders, with positive correlations to PTX3 and HP expression. The study demonstrates convergent innate immune dysregulation with relative adaptive immune suppression, supporting a shared inflammatory phenotype. Drug repurposing analysis identified anti-inflammatory compounds including withaferin A and myricetin as potential therapeutics. Clinical implications include biomarker-informed diagnostics for comorbid presentations and rationale for immunomodulatory interventions. These findings align with acupuncture's demonstrated anti-inflammatory mechanisms and support integrative treatment approaches targeting shared immune pathways in migraine-depression comorbidity.