Anti-KS: Identification of autoantibodies to asparaginyl-transfer RNA synthetase associated with interstitial lung disease

Michito Hirakata, Akira Suwa, Sonoko Nagai, Michael A. Kron, Edward P. Trieu, Tsuneyo Mimori, Masashi Akizuki, Ira N. Targoff

研究成果: Article査読

145 被引用数 (Scopus)

抄録

Autoantibodies to five of the aminoacyl-transfer RNA (tRNA) synthetases have been described, and each is-associated with a syndrome of inflammatory myopathy with interstitial lung disease (ILD) and arthritis. Serum KS, from a patient with ILD and inflammatory arthritis without evidence of myositis, immunoprecipitated a tRNA that was distinct from that precipitated by any described anti-synthetase or other reported tRNA-related Abs, along with a protein of 65 kDa. KS serum and IgG fraction each showed significant (88%) inhibition of asparaginyl-tRNA synthetase (AsnRS) activity, but not of any of the other 19 aminoacyl-tRNA synthetase activities. Among 884 patients with connective tissue diseases tested, only two other sera were found to immunoprecipitate tRNAs and proteins of identical gel mobility. These two and KS showed identical immunodiffusion lines using HeLa cell extract. The new sera significantly inhibited AsnRS without significant effects on other synthetases tested. Both patients had ILD but neither had evidence of myositis. These data strongly suggest that these three sera have autoantibodies to AsnRS, representing a sixth anti-synthetase. Anti-KS was more closely associated with ILD than with myositis. Further study of this Abs might prove useful in dissecting the stimuli responsible for the genesis of anti-synthetase autoantibodies.

本文言語English
ページ(範囲)2315-2320
ページ数6
ジャーナルJournal of Immunology
162
4
出版ステータスPublished - 1999 2 15

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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