Key result
Akt1 and Akt2 knockouts show distinct antiviral responses to HSV-1, revealing non-redundant in vivo roles.
Why the study?
Akt isoforms are generally considered functionally redundant in contributing to total Akt activity, but their distinct roles during infection remained unclear.
Provides in vivo evidence that Akt isoforms have distinct, non-redundant immune-regulatory roles during viral infection.
Akt isoform targeting in HSV-1 warrants caution; hypothesis-generating for non-redundant roles requiring human validation.
Akt isoforms are generally considered functionally redundant, contributing to total Akt activity. However, during HSV-1 infection, Akt1 and Akt2 knockout animals exhibited distinct antiviral responses. Unexpectedly, in the absence of Akt1, Akt2 played a unique role in regulating cytokine production and inactivating proapoptotic transcription factor FoxO3a, a mechanism not shared by Akt1. These findings provide the clearest in vivo evidence yet that Akt isoforms are not functionally redundant, revealing distinct immune-regulatory roles for each isoform and suggesting a broader principle for fine-tuning immunity and cell death across diverse pathological settings.
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Suryawanshi et al. (2025) studied HSV-1 infection. Akt1 and Akt2 knockout was evaluated on Antiviral responses, cytokine production, and FoxO3a inactivation. Akt1 and Akt2 knockout animals exhibited distinct antiviral responses during HSV-1 infection, demonstrating that Akt isoforms are not functionally redundant in vivo.
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