AKT is necessary for neuronal hypertrophy and epilepsy caused by Pten knockout.

Concurrent deletion of Akt1 and Akt3 isoforms in murine neurons is sufficient to rescue PTEN-loss–driven hypertrophic morphology and physiology, implicating AKT as the essential mediator.

• Why it matters: PTEN deficiency in neurons produces hypertrophy, excitatory synapse changes, migration, hyperexcitability, and epileptiform activity, but the downstream signaling mediators driving these phenotypes were unclear.
• What they did: Using retroviral-mediated Cre-lox manipulation of individual murine neurons, the study measured pathway outputs with immunohistochemistry, confocal microscopy, morphological analyses, whole-cell patch-clamp, and 120-h video-EEG after altering candidate genes.
• The result: AKT signaling is necessary for neuronal overgrowth, excitatory synapse formation, excessive migration, and hyperexcitability linked to PTEN loss, enabling AKT as a therapeutic target for PTEN-related neurodevelopmental defects.

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