Aberrant expression of cell-free nucleosomes in dermatomyositis/polymyositis.

Abstract:

:Nucleosomes are typically located intracellularly, and extracellular levels of nucleosomes indicated the degree of cell death. We postulated aberrant nucleosomes expression in dermatomyositis (DM) and polymyositis (PM). To assess the aberrant expression of circulating nucleosomes in DM and polymyositis. 76 consecutive DM and PM patients from 1 September 2017 to 31 October 2018 were enrolled in this study, in addition to 20 healthy controls. The levels of circulating nucleosomes, with 16 kinds of detectable myositis-specific antibodies (MSAs) were detected in IIMs patients using enzyme-linked immunosorbent assay kit (ELISA). Receiver operating characteristic (ROC) curve analysis was performed for evaluating the ability of this candidate marker for detecting DM/PM. The results showed that the levels of circulating nucleosomes in DM/PM patients were significantly higher than that in normal individuals. Specifically, elevated levels of nucleosomes were associated with MDA5 Ab, ARS, and TIF1γAb. In addition, elevated levels of circulating nucleosomes correlated with skin eruption. This study has evidenced nucleosomes as a potential new biomarker of DM/PM. Aberrant nucleosomes expression occurs in myositis patients and the difference in nucleosomes expression between patients with and without skin eruption is statistically significant. A unique expression profile of elevated serum nucleosomes was detected in DM/PM-MDA5 Ab(+), ASS, and TIF1γAb(+).

journal_name

Dermatol Ther

journal_title

Dermatologic therapy

authors

Zhong D,Wu C,Bai J,Zhao J,Xu D,Li M,Wang Q,Wang F,Zeng X

doi

10.1111/dth.14460

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

e14460

issue

6

eissn

1396-0296

issn

1529-8019

journal_volume

33

pub_type

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