Ovaj gen kodira p19 podjedinicu heterodimerskog citokina interleukin 23 (IL23). IL23 se sastoji od ovog proteina i p40 podjedinice interleukina 12 (IL12B). IL23 receptor je formiran od beta 1 podjedinice IL12 (IL12RB1) i IL23 specifične podjedinice, IL23R. Oba interleukina, IL23 i IL12, mogu aktivirati traskripcioni aktivator STAT4, i stimulisati produkciju interferona gama (INFG). U kontrastu sa IL12, koje deluje uglavnom na naivnim CD4(+) T ćelijama, IL23 preferentno deluje na memorijske CD4(+) T ćelije.[2]
IL-23 je važan deo inflamatornog odgovora na infekciju. On podstiče izražavanje matriks metaloproteazaMMP9, povećava angiogenezu i redukuje infiltraciju CD8+ T-ćelija. Nedavno, IL-23 je bio impliciran u razvoj kancerogenih tumora. U kombinaciji sa IL-6 i TGF-β1, IL-23 stimuliše naivne CD4+ T ćelije da se diferenciraju u nove podskupove ćelija koje se zovu Th17 ćelije, koje se razlikuju od klasičnih Th1 i Th2 ćelija. Th17 ćelije proizvode IL-17, proinflamatorni citokin koji pojačava T ćelijsko oformljavanje i stimuliše produkciju proinflamatornih molekula kao što su IL-1, IL-6, TNF-alfa, NOS-2, i hemokine rezultujući u inflamaciji. Nokaut miševi deficitni u bilo p40 ili p19, ili u bilo kojoj podjedinici IL-23 receptora (IL-23R i IL12R-β1) razvijaju manje ozbiljne simptome multiple skleroze i upalne bolesti creva naglašavajući važnost IL-23 u inflamatornom putu.[5][6]
↑Oppmann B, Lesley R, Blom B, Timans JC, Xu Y, Hunte B, Vega F, Yu N, Wang J, Singh K, Zonin F, Vaisberg E, Churakova T, Liu M, Gorman D, Wagner J, Zurawski S, Liu Y, Abrams JS, Moore KW, Rennick D, de Waal-Malefyt R, Hannum C, Bazan JF, Kastelein RA (Jan 2001). „Novel p19 protein engages IL-12p40 to form a cytokine, IL-23, with biological activities similar as well as distinct from IL-12”. Immunity13 (5): 715–25. PMID11114383.
↑Thomas J. Kindt, Richard A. Goldsby, Barbara Anne Osborne, Janis Kuby (2006). Kuby Immunology (6 izd.). New York: W H Freeman and company. ISBN1-4292-0211-4.
↑Langowski JL, Zhang X, Wu L, Mattson JD, Chen T, Smith K, Basham B, McClanahan T, Kastelein RA, Oft M (2006). „IL-23 promotes tumour incidence and growth”. Nature442 (7101): 461–5. DOI:10.1038/nature04808. PMID16688182.
↑Kikly K, Liu L, Na S, Sedgwick JD (2006). „The IL-23/Th(17) axis: therapeutic targets for autoimmune inflammation”. Curr. Opin. Immunol.18 (6): 670–5. DOI:10.1016/j.coi.2006.09.008. PMID17010592.
↑Oppmann, B; Lesley R, Blom B, Timans J C, Xu Y, Hunte B, Vega F, Yu N, Wang J, Singh K, Zonin F, Vaisberg E, Churakova T, Liu M, Gorman D, Wagner J, Zurawski S, Liu Y, Abrams J S, Moore K W, Rennick D, de Waal-Malefyt R, Hannum C, Bazan J F, Kastelein R A (2000). „Novel p19 protein engages IL-12p40 to form a cytokine, IL-23, with biological activities similar as well as distinct from IL-12”. Immunity (UNITED STATES) 13 (5): 715–25. ISSN1074-7613. PMID11114383.
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