STAT3 and post-traumatic stress disorder: Redox-sensitive transcription factors such as nuclear factor kappa B (NF-κB), nuclear factor erythroid 2-related factor 2 (Nrf2), signal transducer and activator of transcription 3 (STAT3), and activator protein 1 (AP-1) play central roles in regulating stress- and inflammation-related signaling pathways implicated in PTSD pathogenesis [15,16,17,18].