51. Possible correlation between serum interleukin-8 levels and the activity of myositis in anti-NXP2 antibody-positive dermatomyositis.
- Author
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Konishi, Risa, Ichimura, Yuki, Tanaka, Ryota, Miyahara, Hanako, Okune, Mari, Miyamoto, Masahide, Hara, Monami, Iwabuchi, Atsushi, Takada, Hidetoshi, Nakagishi, Yasuo, Mizuta, Mao, Kaneko, Shuya, Shimizu, Masaki, Morio, Tomohiro, Nishino, Ichizo, Nomura, Toshifumi, and Okiyama, Naoko
- Subjects
MYOSITIS ,INTERLEUKIN-8 ,DERMATOMYOSITIS ,ENZYME-linked immunosorbent assay ,INTERSTITIAL lung diseases ,EXTRACELLULAR matrix proteins ,POLYMYOSITIS - Abstract
Anti-nuclear matrix protein 2 (NXP2) antibody-positive dermatomyositis (DM) is characterized by extensive and severe myositis. In this study, we evaluated which cytokines/chemokines involved with the activity of the myositis. We performed quantitative immunoassays using the MILLIPLEX
® Multiplex Assays Using Luminex to evaluate serum levels of interferon-γ, interleukin (IL)-1β, IL-6, IL-8, IL-12p40, and tumor necrosis factor-α in samples collected over time from a 9-year-old female with anti-NXP2 antibody-positive DM. In our case, the serum level of IL-8 was elevated when the myositis worsened, and decreased in accordance with the improvement of myositis, suggesting that the serum IL-8 levels were correlated with the myositis activity. Serum levels of IL-8 in samples from five patients with anti-NXP2 antibody-positive DM and five patients with anti-transcriptional intermediary factor 1γ (TIF1γ) antibody-positive DM without both interstitial lung disease (ILD) and malignancy before starting treatments, along with five healthy controls, were also evaluate by an enzyme-linked immunosorbent assay. Serum IL-8 levels were significantly elevated in anti-NXP2 or anti-TIF1γ antibody-positive DM patients with myositis but not ILD, than healthy controls. It was suggested that serum levels of IL-8 correlate with the activity of myositis in DM including anti-NXP2 antibody-positive DM. [ABSTRACT FROM AUTHOR]- Published
- 2024
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