Glutamatergic and Redox Abnormalities in Major Depressive Disorder: Links to Childhood Maltreatment and Perceived Stress

In the medial prefrontal cortex of 71 women, lower glutamate and Glx are linked to childhood sexual abuse exposure, with no significant glutamatergic differences in MDD without CSA versus healthy controls.

• Why it matters: Childhood sexual abuse raises major depressive disorder risk, but the neurochemical mechanisms and how they relate to later stress remain unclear.
• What they did: Using proton and phosphorus 4T magnetic resonance spectroscopy in the same mPFC voxel, the study measured glutamate, glutamine, Glx, and the NAD/NADH ratio across four groups and tested links to maltreatment and 6-month perceived stress.
• The result: Among CSA-exposed women, maltreatment severity and multiplicity are associated with lower glutamine and lower glutamate/Glx, and a baseline NAD/NADH ratio interaction predicts 6-month perceived stress only in MDD without CSA.

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