Reduced thalamic glutathione in migraine: a MEGA-PRESS spectroscopy study.

Area of Science:

• Neuroscience
• Biochemistry
• Medical Imaging

Background:

• Migraine and tension-type headache (TTH) are common primary headache disorders without objective biomarkers.
• Oxidative stress is implicated in migraine pathophysiology, with glutathione (GSH) as the brain's primary antioxidant.
• This study explores thalamic GSH levels as a potential biomarker for differentiating migraine from TTH.

Purpose of the Study:

• To investigate thalamic glutathione (GSH) levels using optimized MEGA-PRESS spectroscopy.
• To determine if thalamic GSH can serve as a biomarker to differentiate migraine from TTH.
• To analyze the role of oxidative stress in the pathophysiology of migraine.

Main Methods:

• Cross-sectional study with 76 participants: 20 healthy controls (HC), 19 TTH patients, and 37 migraine patients.
• Bilateral thalamic GSH measured using MEGA-PRESS at 3T.
• Group comparisons via one-way ANOVA and ROC analysis for diagnostic performance.

Main Results:

• Migraine patients exhibited significantly reduced thalamic GSH compared to HC and TTH groups (p < 0.001).
• No significant difference in thalamic GSH was observed between HC and TTH groups.
• Left thalamic GSH demonstrated high diagnostic accuracy in distinguishing migraine from HC (AUC=0.897) and TTH (AUC=0.879).

Conclusions:

• Reduced thalamic GSH levels differentiate migraine from TTH in the studied sample.
• This supports a distinct role for oxidative stress in migraine pathophysiology.
• Thalamic GSH shows promise as a candidate biomarker for differentiating migraine from TTH.