Increased number and frequency of group 3 innate lymphoid cells in nonlesional psoriatic skin
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Increased number and frequency of group 3 innate lymphoid cells in nonlesional psoriatic skin. / Dyring-Andersen, B; Geisler, Carsten; Agerbeck, C; Lauritsen, J P H; Gúdjonsdottir, S D; Skov, L; Bonefeld, C M.
In: British Journal of Dermatology, Vol. 170, No. 3, 03.2014, p. 609-16.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Increased number and frequency of group 3 innate lymphoid cells in nonlesional psoriatic skin
AU - Dyring-Andersen, B
AU - Geisler, Carsten
AU - Agerbeck, C
AU - Lauritsen, J P H
AU - Gúdjonsdottir, S D
AU - Skov, L
AU - Bonefeld, C M
N1 - © 2013 British Association of Dermatologists.
PY - 2014/3
Y1 - 2014/3
N2 - BACKGROUND: Psoriasis is a common immune-mediated inflammatory disease that affects the skin and joints. The interleukin (IL)-23/IL-17A axis and IL-22 play key roles in the pathogenesis of psoriasis. IL-23-responsive innate lymphoid cells (ILCs) with a high capacity to produce IL-17 and/or IL-22 have recently been identified and associated with inflammatory bowel diseases. The occurrence and role of ILCs in human skin are poorly understood.OBJECTIVES: To describe the prevalence of the different ILC subpopulations in skin from healthy controls and patients with psoriasis or allergy to nickel.METHODS: Skin biopsies were taken from healthy skin, nonlesional and lesional psoriatic skin, and nickel- and petrolatum-exposed skin from patients with contact allergy to nickel, and lymphocytes were isolated. The cells were stained and characterized by flow cytometry. Cytokine and ligand mRNA expression were measured by quantitative polymerase chain reaction.RESULTS: We found that members of the three groups of ILCs were present in human skin. Remarkably, the number and frequency of RORγt(+) CD56(+) ILC3s, which are known to produce IL-22, were elevated in both nonlesional and lesional skin from patients with psoriasis compared with healthy skin and skin from patients with contact allergy to nickel. Furthermore, skin ILCs expressed high levels of the natural killer receptor NKG2D. NKG2D binds to stress-induced ligands, including major histocompatibility complex class I-related chain A, which we found to be strongly upregulated in lesional skin from patients with psoriasis.CONCLUSION: These results show that ILCs are present in human skin and indicate that RORγt(+) CD56(+) ILC3 may be involved in the pathogenesis of psoriasis.
AB - BACKGROUND: Psoriasis is a common immune-mediated inflammatory disease that affects the skin and joints. The interleukin (IL)-23/IL-17A axis and IL-22 play key roles in the pathogenesis of psoriasis. IL-23-responsive innate lymphoid cells (ILCs) with a high capacity to produce IL-17 and/or IL-22 have recently been identified and associated with inflammatory bowel diseases. The occurrence and role of ILCs in human skin are poorly understood.OBJECTIVES: To describe the prevalence of the different ILC subpopulations in skin from healthy controls and patients with psoriasis or allergy to nickel.METHODS: Skin biopsies were taken from healthy skin, nonlesional and lesional psoriatic skin, and nickel- and petrolatum-exposed skin from patients with contact allergy to nickel, and lymphocytes were isolated. The cells were stained and characterized by flow cytometry. Cytokine and ligand mRNA expression were measured by quantitative polymerase chain reaction.RESULTS: We found that members of the three groups of ILCs were present in human skin. Remarkably, the number and frequency of RORγt(+) CD56(+) ILC3s, which are known to produce IL-22, were elevated in both nonlesional and lesional skin from patients with psoriasis compared with healthy skin and skin from patients with contact allergy to nickel. Furthermore, skin ILCs expressed high levels of the natural killer receptor NKG2D. NKG2D binds to stress-induced ligands, including major histocompatibility complex class I-related chain A, which we found to be strongly upregulated in lesional skin from patients with psoriasis.CONCLUSION: These results show that ILCs are present in human skin and indicate that RORγt(+) CD56(+) ILC3 may be involved in the pathogenesis of psoriasis.
KW - Case-Control Studies
KW - Dermatitis, Allergic Contact
KW - Humans
KW - Interleukin-23
KW - Interleukins
KW - Killer Cells, Natural
KW - Lymphocyte Subsets
KW - Lymphocytosis
KW - NK Cell Lectin-Like Receptor Subfamily K
KW - Nickel
KW - Nuclear Receptor Subfamily 1, Group F, Member 3
KW - Psoriasis
KW - RNA, Messenger
U2 - 10.1111/bjd.12658
DO - 10.1111/bjd.12658
M3 - Journal article
C2 - 24125475
VL - 170
SP - 609
EP - 616
JO - British Journal of Dermatology
JF - British Journal of Dermatology
SN - 0007-0963
IS - 3
ER -
ID: 135491214