Interleukin-36 gamma previously known as interleukin-1 family member 9 (IL1F9) is a protein that in humans is encoded by the IL36Ggene.[5][6][7][8]
Expression
IL36G is well-expressed in the epithelium of the skin, gut, and lung.[9] In the skin IL36G is predominantly expressed in epidermal granular layer keratinocytes with little to no expression in basal layer keratinocytes.[10]
Function
The protein encoded by this gene is a member of the interleukin-1cytokine family. This gene and eight other interleukin-1 family genes form a cytokine gene cluster on chromosome 2.[11] The activity of this cytokine is mediated via the interleukin-1 receptor-like 2 (IL1RL2/IL1R-rp2/IL-36 receptor), and is specifically inhibited by interleukin-36 receptor antagonist, (IL-36RA/IL1F5/IL-1 delta). Interferon-gamma, tumor necrosis factor-alpha and interleukin-1 β (IL-1β) are reported to stimulate the expression of this cytokine in keratinocytes. The expression of this cytokine in keratinocytes can also be induced by a multiple Pathogen-Associated Molecular Patterns (PAMPs).[12] Both IL-36γ mRNA and protein have been linked to psoriasis lesions and has been used as a biomarker for differentiating between eczema and psoriasis.[13][14] As with many other interleukin-1 family cytokines IL-36γ requires proteolytic cleavage of its N-terminus for full biological activity.[15] However, unlike IL-1β the activation of IL-36γ is inflammasome-independent. IL-36γ is specifically cleaved by the endogenous protease cathepsin S as well exogenous proteases derived from fungal and bacterial pathogens.[16][17]
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Busfield SJ, Comrack CA, Yu G, Chickering TW, Smutko JS, Zhou H, Leiby KR, Holmgren LM, Gearing DP, Pan Y (June 2000). "Identification and gene organization of three novel members of the IL-1 family on human chromosome 2". Genomics. 66 (2): 213–6. doi:10.1006/geno.2000.6184. PMID10860666.
^Nicklin MJ, Barton JL, Nguyen M, FitzGerald MG, Duff GW, Kornman K (May 2002). "A sequence-based map of the nine genes of the human interleukin-1 cluster". Genomics. 79 (5): 718–25. doi:10.1006/geno.2002.6751. PMID11991722.
^Taylor SL, Renshaw BR, Garka KE, Smith DE, Sims JE (May 2002). "Genomic organization of the interleukin-1 locus". Genomics. 79 (5): 726–33. doi:10.1006/geno.2002.6752. PMID11991723.
Nicklin MJ, Weith A, Duff GW (January 1994). "A physical map of the region encompassing the human interleukin-1 alpha, interleukin-1 beta, and interleukin-1 receptor antagonist genes". Genomics. 19 (2): 382–4. doi:10.1006/geno.1994.1076. PMID8188271.
Nothwang HG, Strahm B, Denich D, Kübler M, Schwabe J, Gingrich JC, Jauch A, Cox A, Nicklin MJ, Kurnit DM, Hildebrandt F (May 1997). "Molecular cloning of the interleukin-1 gene cluster: construction of an integrated YAC/PAC contig and a partial transcriptional map in the region of chromosome 2q13". Genomics. 41 (3): 370–8. doi:10.1006/geno.1997.4654. PMID9169134.
Mulero JJ, Pace AM, Nelken ST, Loeb DB, Correa TR, Drmanac R, Ford JE (October 1999). "IL1HY1: A novel interleukin-1 receptor antagonist gene". Biochemical and Biophysical Research Communications. 263 (3): 702–6. doi:10.1006/bbrc.1999.1440. PMID10512743.
Pan G, Risser P, Mao W, Baldwin DT, Zhong AW, Filvaroff E, Yansura D, Lewis L, Eigenbrot C, Henzel WJ, Vandlen R (January 2001). "IL-1H, an interleukin 1-related protein that binds IL-18 receptor/IL-1Rrp". Cytokine. 13 (1): 1–7. doi:10.1006/cyto.2000.0799. PMID11145836.
Sims JE, Nicklin MJ, Bazan JF, Barton JL, Busfield SJ, Ford JE, Kastelein RA, Kumar S, Lin H, Mulero JJ, Pan J, Pan Y, Smith DE, Young PR (October 2001). "A new nomenclature for IL-1-family genes". Trends in Immunology. 22 (10): 536–7. doi:10.1016/S1471-4906(01)02040-3. PMID11574262.
Vos JB, van Sterkenburg MA, Rabe KF, Schalkwijk J, Hiemstra PS, Datson NA (May 2005). "Transcriptional response of bronchial epithelial cells to Pseudomonas aeruginosa: identification of early mediators of host defense". Physiological Genomics. 21 (3): 324–36. doi:10.1152/physiolgenomics.00289.2004. PMID15701729. S2CID27639384.