Human recombinant PK2 (#100-46), tumor necrosis factor α (TNFα) (300-01A), IL-1β (#200-01B), and transforming growth factor β (TGFβ) (#100-21C) were obtained from Peprotech (Rocky Hill, NJ, USA). The PKR1 and PKR2 antagonist41 (link) [PKRA7 (508942)] was obtained from Merck (Darmstadt, Germany), and the PKR1 antagonist (PC-7)42 (link) was generated by one of the authors of the current study (G.B.).
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