Figure 6

Schematic representation of PKR-dependent Aβ production in brain after systemic inflammation.
Peripheral inflammation communicates with the brain through the blood-brain barrier to induce microglial activation and pro-inflammatory cytokines production, involving PKR pathway. Cytokines, including TNFα, activate PKR in neurons leading to Aβ production. Thereof could be controlled by the activation of transcription factor STAT3.