The use of ELISA is comparable to immunoprecipitation in the detection of selected myositis-specific autoantibodies in a European population

Aravinthan Loganathan, Fionnuala McMorrow, Hui Lu, Danyang Li, Ben Mulhearn, Neil John McHugh, Sarah Louise Tansley

Research output: Contribution to journalArticlepeer-review

Abstract

Background: The reliable detection of myositis-specific autoantibodies (MSA) provides valuable clinical information regarding prognosis, clinical progression and diagnostic confirmation.

Objectives: To evaluate the reliability of a commercial ELISA immunoassay in detecting myositis-specific autoantibodies in comparison to immunoprecipitation as the reference standard.

Methods: Serum samples were chosen from a biobank of more than 3000 samples. Samples with a confirmed MSA on Immunoprecipitation (n=116) were evaluated in duplicate by ELISA to detect Mi2, MDA5, Jo1, EJ, KS, PL-7 and PL-12 (Medical & Biological Laboratories Co. Ltd, Nagoya, Aichi, Japan). Healthy control samples (n=246) confirmed autoantibody negative by immunoprecipitation were similarly assessed.

Results: There was a very good agreement between ELISA and immunoprecipitation for serum samples containing anti-Mi2, MDA5, Jo1, EJ, KS and PL-7 and PL-12 auto-antibodies. Cohen's κ values ranged from 0.86-1 for the measured autoantibodies on ELISA.

Conclusion: ELISA was an accurate method for detecting anti-synthetase, anti-Mi2 and anti-MDA5 autoantibodies.

Original languageEnglish
Article number975939
JournalFrontiers in Immunology
Volume13
DOIs
Publication statusPublished - 8 Sep 2022

Keywords

  • ELISA - enzyme-linked immunosorbent assay
  • diagnostic accuracy
  • diagnostic test
  • immunoprecipitation (IP)
  • inflammatory myositis
  • myositis autoantibody

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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