Interferon pathway (host immune system stimulation)

The "host immune system via interferon pathway stimulation" is not a molecule or discrete receptor but an immunological process involving the induction of type I, II, or III interferon signaling cascades. Interferons (IFNs) are cytokines secreted by host cells in response to viral infection or pathogen recognition and bind to their specific cell surface receptors—type I IFNs bind the interferon alpha/beta receptor (IFNAR), type II IFN binds the interferon gamma receptor (IFNGR), and type III IFNs bind the interferon lambda receptor (IFNLR)[2][4][5][6]. These pathways activate intracellular JAK-STAT signaling, resulting in transcription of hundreds of interferon-stimulated genes (ISGs) that mediate antiviral and immunomodulatory effects[1][3][6]. Interferon pathway activation is a well-established therapeutic mechanism for numerous antiviral, anticancer, and immunomodulatory drugs, but as a target it is not a singular, druggable molecule or protein[5]. Due to its broad functional role, pharmacological interferons (such as IFN-α, IFN-β, and pegylated IFN-λ) are clinically used in viral infections (hepatitis, COVID-19), some cancers, and autoimmune disorders, with efficacy and safety depending on context and timing of administration[2][4].

Other names

Interferon signaling axisIFN pathwayIFN signalingInterferon-mediated immune response

Agonist/activation of cellular interferon receptors to induce antiviral and immunomodulatory interferon-stimulated gene expression - Indirect enhancement of host defense via upregulation of MHC and cytokine induction