Inflammatory cytokines and signaling

Inflammatory cytokines and signaling refers to the complex network of secreted proteins and their associated intracellular pathways that mediate the immune system's response to injury or infection [1]. Key cytokines involved in this process include tumor necrosis factor-alpha (TNF-alpha), interleukins such as IL-1 and IL-6, and various interferons, which bind to specific cell-surface receptors to trigger downstream signaling cascades [2]. These cascades, most notably the NF-kappaB and Janus kinase/Signal Transducer and Activator of Transcription (JAK/STAT) pathways, regulate the expression of genes essential for inflammation, cell proliferation, and survival [3]. While these processes are vital for host defense, their chronic or excessive activation is a primary driver of autoimmune and inflammatory diseases, such as rheumatoid arthritis, psoriasis, and inflammatory bowel disease [4]. Therapeutic strategies targeting this system include monoclonal antibodies that neutralize cytokines or block their receptors, as well as small molecule inhibitors to block downstream signaling enzymes [5]. The interplay between different cytokines often creates a redundant and synergistic environment, making the selection of specific targets critical for therapeutic efficacy [6]. However, because these pathways are fundamental to immune surveillance, their pharmacological suppression carries significant safety concerns, including an increased risk of serious opportunistic infections and potential malignancies [7]. References: [1] Dinarello, C. A. (2018). Immunological Reviews. [2] Feldmann, M. (2002). Nature Reviews Immunology. [3] O'Shea, J. J., & Plenge, R. (2012). New England Journal of Medicine. [4] McInnes, I. B., & Schett, G. (2011). New England Journal of Medicine. [5] Scott, I. C., & Steer, S. (2014). International Journal of Clinical Rheumatology. [6] Kallenberg, C. G. (2014). Journal of Internal Medicine. [7] Winthrop, K. L. (2017). Nature Reviews Rheumatology.

Other names

Pro-inflammatory cytokine signalingCytokine-mediated signaling pathwayInflammatory cascadeCytokine storm pathways

Therapeutic agents modulate this system by neutralizing circulating cytokine ligands, blocking their specific cell-surface receptors, or inhibiting intracellular signaling transducers like Janus kinases (JAKs) to prevent the transcription of inflammatory genes.