Abstract
Keratin-17 (K17) is a cytoskeletal protein produced by keratinocytes (KCs), which is overexpressed in psoriasis and may play a pivotal role in its pathogenesis. Narrow-band ultraviolet B (NB-UVB) irradiation is used as a general treatment for psoriasis, although its impact on K17 expression has yet to be determined. In this study, we aimed to investigate the effect of NB-UVB irradiation on K17 expression and its signaling pathways. After exposure to NB-UVB irradiation, immortalized human keratinocytes (HaCaT cells) were analyzed by flow cytometry, CCK-8 assays and transmission electron microscopy to examine proliferation. Meanwhile, K17 expression in primary human epithelial keratinocytes was detected by quantitative real-time polymerase chain reaction (qRT-PCR), western blot analysis and immunofluorescence. HaCaT cells pre-incubated with PD-98059 and piceatannol were subjected to western blot analysis to examine ERK1/2 and STAT3 phosphorylation. The ears of mice treated with imiquimod (IMQ) and irradiated by NB-UVB were taken to examine K17 expression by qRT-PCR, western blot analysis, and immunofluorescence. Our results showed that 400 mJ/cm2 of NB-UVB irradiation was the maximum tolerable dose for HaCaT cells and could cause inhibited HaCaT cell proliferation and moderate increase of the early apoptosis. Furthermore, NB-UVB irradiation could downregulate K17 expression by inhibiting the ERK1/2 and STAT3 signaling pathways. In experiments conducted in vivo, NB-UVB irradiation with doses of MED or higher could eliminate the IMQ-induced psoriasis-like dermatitis and inhibit K17 expression. These results indicated that NB-UVB irradiation may eliminate chronic psoriatic plaques by suppressing K17 expression via the ERK1/2 and STAT3 signaling pathways.
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References
Arican O, Aral M, Sasmaz S, Ciragil P (2005) Serum levels of TNF-alpha, IFN-gamma, IL-6, IL-8, IL-12, IL-17, and IL-18 in patients with active psoriasis and correlation with disease severity. Mediat Inflamm 2005(5), 273–279
Aufiero BM, Talwar H, Young C, Krishnan M, Hatfield JS, Lee HK, Wong HK, Hamzavi I, Murakawa GJ (2006) Narrow-band UVB induces apoptosis in human keratinocytes. J Photochem Photobiol B 82(2):132–139
Chang T, Sun L, Wang Y, Wang D, Li W, Li C, Gao T, Liu Y, Wang G (2011) Inhibition of keratin 17 expression with antisense and RNAi strategies: exploring novel therapy for psoriasis. Exp Dermatol, 20(7), 555–560
de Jong EM, van Vlijmen IM, van Erp PE, Ramaekers FC, Troyanovski SM, van de Kerkhof PC (1991) Keratin 17: a useful marker in anti-psoriatic therapies. Arch Dermatol Res 283(7):480–482
Del BS, Vioux C, Rossio-Pasquier P, Jomard A, Demarchez M, Asselineau D, Bernerd F (2004) Ultraviolet B induces hyperproliferation and modification of epidermal differentiation in normal human skin grafted on to nude mice. Br J Dermatol 150(4), 658–667
Erkin G, Ugur Y, Gurer CK, Asan E, Korkusuz P, Sahin S, Kolemen F (2007) Effect of PUVA, narrow-band UVB and cyclosporin on inflammatory cells of the psoriatic plaque. J Cutan Pathol 34(3):213–219
Freedberg IM, Tomic-Canic M, Komine M, Blumenberg M (2001) Keratins and the keratinocyte activation cycle. J Invest Dermatol, 116(5), 633–640
Fu M, Wang G (2012) Keratin 17 as a therapeutic target for the treatment of psoriasis. J Dermatol Sci 67(3):161–165
Gu X, Nylander E, Coates P, Nylander K (2015) Oxidation reduction is a key process for successful treatment of psoriasis by narrow-band UVB phototherapy. Acta Derm Venereol 95(2):140–146
Hachiya A, Sriwiriyanont P, Fujimura T, Ohuchi A, Kitahara T, Takema Y, Kitzmiller WJ, Visscher MO, Tsuboi R, Boissy RE (2009) Mechanistic effects of long-term ultraviolet B irradiation induce epidermal and dermal changes in human skin xenografts. Am J Pathol 174(2):401–413
Jiang M, Sun Z, Dang E, Li B, Fang H, Li J, Gao L, Zhang K, Wang G (2017) TGFbeta/SMAD/microRNA-486-3p signaling axis mediates keratin 17 expression and keratinocyte hyperproliferation in psoriasis. J Invest Dermatol 137(10):2177–2186
Jin L, Wang G (2014) Keratin 17: a critical player in the pathogenesis of psoriasis. Med Res Rev 34(2):438–454
Karantza V (2011) Keratins in health and cancer: more than mere epithelial cell markers. Oncogene 30(2):127–138
Kim S, Wong P, Coulombe PA (2006) A keratin cytoskeletal protein regulates protein synthesis and epithelial cell growth. Nature 441(7091):362–365
Liao C, Xie G, Zhu L, Chen X, Li X, Lu H, Xu B, Ramot Y, Paus R, Yue Z (2016) p53 is a direct transcriptional repressor of keratin 17: lessons from a rat model of radiation dermatitis. J Invest Dermatol 136(3):680–689
Luo S, Peng Z, Zheng Y, Zhang L, Feng Y, Wang G (2007) Synergistic effects of acitretin and narrow-band UVB on inducing the expression of heparin-binding epidermal-growth-factor-like growth factor in normal human keratinocytes. Arch Dermatol Res, 299(8), 409–413
Luo S, Zheng Y, Peng Z, Jiang J, Gondokaryono S, Wang G, Ikeda S (2008) Effects of narrow-band ultraviolet B and tazarotene therapy on keratinocyte proliferation and TIG3 expression. J Dermatol 35(10):651–657
Nestle FO, Kaplan DH, Barker J (2009) Psoriasis. N Engl J Med 361(5):496–509
Ozawa M, Ferenczi K, Kikuchi T, Cardinale I, Austin LM, Coven TR, Burack LH, Krueger JG (1999) 312-nanometer ultraviolet B light (narrow-band UVB) induces apoptosis of T cells within psoriatic lesions. J Exp Med 189(4):711–718
Paramio JM, Segrelles C, Lain S, Gomez-Casero E, Lane DP, Lane EB, Jorcano JL (2000) p53 is phosphorylated at the carboxyl terminus and promotes the differentiation of human HaCaT keratinocytes. Mol Carcinog 29(4), 251–262
Qin JZ, Chaturvedi V, Denning MF, Bacon P, Panella J, Choubey D, Nickoloff BJ (2002) Regulation of apoptosis by p53 in UV-irradiated human epidermis, psoriatic plaques and senescent keratinocytes. Oncogene 21(19):2991–3002
Racz E, Kurek D, Kant M, Baerveldt EM, Florencia E, Mourits S, de Ridder D, Laman JD, van der Fits L, Prens EP (2011) GATA3 expression is decreased in psoriasis and during epidermal regeneration; induction by narrow-band UVB and IL-4. PLoS One 6(5):e19806
Racz E, Prens EP, Kurek D, Kant M, de Ridder D, Mourits S, Baerveldt EM, Ozgur Z, van IJcken WF, Laman JD, Staal FJ, van der Fits L (2011) Effective treatment of psoriasis with narrow-band UVB phototherapy is linked to suppression of the IFN and Th17 pathways. J Invest Dermatol 131(7):1547–1558
Reich A, Lehmann B, Meurer M, Muller DJ (2007) Structural alterations provoked by narrow-band ultraviolet B in immortalized keratinocytes: assessment by atomic force microscopy. Exp Dermatol 16(12):1007–1015
Reich A, Meurer M, Viehweg A, Muller DJ (2009) Narrow-band UVB-induced externalization of selected nuclear antigens in keratinocytes: implications for lupus erythematosus pathogenesis. Photochem Photobiol 85(1):1–7
Reich A, Schwudke D, Meurer M, Lehmann B, Shevchenko A (2010) Lipidome of narrow-band ultraviolet B irradiated keratinocytes shows apoptotic hallmarks. Exp Dermatol 19(8):e103-10
Shen Z, Chen L, Liu YF, Gao TW, Wang G, Fan XL, Fan JY, Fan PS, Li CY, Liu B, Dang YP, Li CX (2006) Altered keratin 17 peptide ligands inhibit in vitro proliferation of keratinocytes and T cells isolated from patients with psoriasis. J Am Acad Dermatol 54(6):992–1002
Shi X, Jin L, Dang E, Chang T, Feng Z, Liu Y, Wang G (2011) IL-17A upregulates keratin 17 expression in keratinocytes through STAT1- and STAT3-dependent mechanisms. J Invest Dermatol 131(12):2401–2408
Sigmundsdottir H, Johnston A, Gudjonsson JE, Valdimarsson H (2005) Narrowband-UVB irradiation decreases the production of pro-inflammatory cytokines by stimulated T cells. Arch Dermatol Res 297(1):39–42
Sitailo LA, Tibudan SS, Denning MF (2002) Activation of caspase-9 is required for UV-induced apoptosis of human keratinocytes. J Biol Chem 277(22):19346–19352
Thewes M, Stadler R, Korge B, Mischke D (1991) Normal psoriatic epidermis expression of hyperproliferation-associated keratins. Arch Dermatol Res 283(7), 465–471
van Beelen AJ, Teunissen MB, Kapsenberg ML, de Jong EC (2007) Interleukin-17 in inflammatory skin disorders. Curr Opin Allergy Clin Immunol 7(5), 374–381
van der Fits L, Mourits S, Voerman JS, Kant M, Boon L, Laman JD, Cornelissen F, Mus AM, Florencia E, Prens EP, Lubberts E (2009) Imiquimod-induced psoriasis-like skin inflammation in mice is mediated via the IL-23/IL-17 axis. J Immunol 182(9):5836–5845
Walters IB, Burack LH, Coven TR, Gilleaudeau P, Krueger JG (1999) Suberythemogenic narrow-band UVB is markedly more effective than conventional UVB in treatment of psoriasis vulgaris. J Am Acad Dermatol 40(6 Pt 1):893–900
Weatherhead SC, Farr PM, Jamieson D, Hallinan JS, Lloyd JJ, Wipat A, Reynolds NJ (2011) Keratinocyte apoptosis in epidermal remodeling and clearance of psoriasis induced by UV radiation. J Invest Dermatol 131(9):1916–1926
Yang L, Fan X, Cui T, Dang E, Wang G (2017) Nrf2 promotes keratinocyte proliferation in psoriasis through up-regulation of keratin 6, keratin 16, and keratin 17. J Investig Dermatol 137(10):2168–2176
Zhang W, Dang E, Shi X, Jin L, Feng Z, Hu L, Wu Y, Wang G (2012) The pro-inflammatory cytokine IL-22 up-regulates keratin 17 expression in keratinocytes via STAT3 and ERK1/2. PLoS One 7(7):e40797
Acknowledgements
This study was supported by the National Natural Science Foundation of China (Grant Nos. 81430073, 81402620, 81672692 and 81220108016).
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The study protocol was approved by the Medical Research Ethics Committee at Xijing Hospital of the Fourth Military Medical University (Xi’an China). Written, informed consent was obtained from all participants prior to the study.
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Zhuang, Y., Han, C., Li, B. et al. NB-UVB irradiation downregulates keratin-17 expression in keratinocytes by inhibiting the ERK1/2 and STAT3 signaling pathways. Arch Dermatol Res 310, 147–156 (2018). https://doi.org/10.1007/s00403-018-1812-1
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DOI: https://doi.org/10.1007/s00403-018-1812-1