What does the presence of antibodies directed against snRNP or RoRNP indicate in patients with polymyositis?

Updated: Jan 05, 2021
  • Author: Mythili Seetharaman, MD; Chief Editor: Herbert S Diamond, MD  more...
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Antibodies directed against snRNP are frequently found in patients with myositis and in patients with connective tissue–disease overlap syndrome, whereas antibodies toward Ro/SSA 60 kD, Ro/SSA 52 kD, and La/SSB protein components of the RoRNP complex are almost exclusively found in patients with Sjögren syndrome and systemic lupus erythematosus (SLE).

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