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. 2022 Jul 4;81(10):1400–1408. doi: 10.1136/annrheumdis-2022-222229

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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Analyses in psoriatic patient samples. (A) S100A8 and S100A9 (red) immunofluorescence staining and quantification in human healthy skin and psoriatic skin (n=5, scale bar=100 µm). (B) S100A8, S100A9, S100A8/A9 (Calprotectin), Interleukin (IL)−17, Tumour necrosis factor alpha (TNF-α) and Interleukin (IL)−6 levels in the serum and synovial fluid of patients with psoriatic arthritis (PsA; n=8, ns=non-significant). (C) S100A8, S100A9, S100A8/A9 (Calprotectin), IL-17, TNF-α and IL-6 serum levels of healthy controls (HC), patients with psoriasis (Ps) or patients with PsA (each group n=24).