Study Finds: Systemic increase of AMPA receptors associated with cognitive impairment of long COVID

Clinical Summary

Reference: Fujimoto et al., Brain Communications (2025). [¹¹C]K-2 PET shows increased AMPAR availability in cognitive long-COVID; immune signature ↑TNFSF12, ↓CCL2.

Relevance: Post-viral neuroinflammation, cognitive inefficiency, brain fog, sensory overload, POTS/IST; low CCL2; PEM; malnutrition.

Mechanism: Immune signaling → AMPAR trafficking → excess glutamatergic throughput → cognitive slowing/fatigue; may amplify autonomic instability.

Next steps:

• Diagnostic: Objective cognitive metrics; consider research AMPAR PET; trend TNFSF12/CCL2.
• Therapeutic (discuss): Perampanel (off-label) or memantine; autonomic care & pacing; track outcomes.
• Research: Neuroimmunology/post-COVID programs; longitudinal biomarkers.

In Plain English

• Your brain’s “excitatory volume knob” (AMPA receptors) looks turned up in long-COVID brain-fog.
• When that knob is high, signals fire too hard for too long — thinking slows, noise/light feel harsh, energy drains fast.
• Your labs (low CCL2) and documented neuroinflammation match the pattern in the study.
• Ask about objective memory/attention testing, research-center imaging, and medicines that gently turn the knob down (with your team).
• We’ll track function before/after any change to see what truly helps.