Unspecified antiviral signaling pathway component downstream of interferon receptor

This entry refers to an undefined molecular component within the signaling cascade initiated by the binding of interferons to their respective receptors, such as IFNAR, IFNGR, or IFNLR (Schneider et al., 2014, Ann Rev Immunol) [1]. The pathway typically involves the activation of receptor-associated Janus kinases (JAKs), including JAK1 and TYK2, which subsequently phosphorylate Signal Transducers and Activators of Transcription (STAT) proteins (Hu et al., 2021, Signal Transduct Target Ther) [2]. These phosphorylated STAT proteins form complexes that translocate to the nucleus to bind specific promoter elements, driving the expression of hundreds of interferon-stimulated genes (ISGs) (Stark & Darnell, 2012, Immunity) [3]. These ISGs are responsible for establishing an antiviral state, inhibiting viral replication, and modulating the broader immune response [1]. Because the specific protein is not identified in this designation, it serves as a functional placeholder for the downstream transduction of interferon signals [2]. Dysregulation of this pathway is implicated in various pathologies, including chronic viral infections, autoimmune "interferonopathies," and certain malignancies (Crow & Stetson, 2021, Ann Rev Immunol) [4]. Therapeutic strategies often involve the use of JAK inhibitors to dampen overactive signaling in inflammatory conditions or the administration of exogenous interferons to boost the antiviral response (Salas et al., 2020, Nat Rev Gastroenterol Hepatol) [5]. Common drugs interacting with this pathway include tofacitinib and baricitinib, which target the kinase components to prevent downstream signal propagation [5].

Other names

Interferon signaling pathway componentsJAK-STAT signaling pathway membersDownstream interferon signaling moleculesType I/II/III interferon signaling cascade

Modulation of the JAK-STAT signaling cascade to regulate the transcription of interferon-stimulated genes (ISGs) (Hu et al., 2021, Signal Transduct Target Ther) [2].