PKR inhibition prevents maladaptive responses to endoplasmic reticulum (ER) stress in early-onset dystonia DYT-PRKRA.

PKR activation is essential for CHOP induction during the integrated stress response in DYT-PRKRA patient cells, linking prolonged PKR activity to heightened apoptosis.

• Why it matters: DYT-PRKRA involves enhanced PACT–PKR signaling under ER stress, but PKR’s role in steering ISR from adaptation toward apoptosis via CHOP was unclear.
• What they did: The study tested PKR’s contribution to ISR signaling and apoptosis in DYT-PRKRA patient cells, and used a small-molecule PKR inhibitor to block CHOP expression.
• The result: In DYT-PRKRA cells, PKR inhibition effectively blocks CHOP expression and significantly decreases apoptosis, supporting PKR inhibition as a therapeutic strategy.

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