Internal Diseases and Therapy · MU Sofia

58. Humoral immunity changes in rheumatic diseases

Explains how humoral immunity underlies many rheumatic diseases, with plasma cells producing autoantibodies against autoantigens. Gives a list pairing each disease with its characteristic antibody, including anti-dsDNA, anti-Sm, anti-Ro, anti-topoisomerase 1, anti-centromere, anti-SRP, ANCA subtypes and rheumatoid factor. Two immunofluorescence images illustrate the perinuclear p-ANCA and granular cytoplasmic c-ANCA patterns.

Inside: 1 section · 2 labelled pictures · 14 flashcards · 1 min

Topic 58 of 139 in the MU Sofia syllabus for Internal Diseases and Therapy (Medicine, Years 4 and 5). The free AceMed note covers it in 1 section, about 127 words (1 min of reading), with 14 flashcards.

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  1. Humoral immunity changes in rheumatic diseases

Humoral immunity changes in rheumatic diseases

Lots of rheumatic diseases have their bases in the humoral immune system. Plasma cells produce specific antibodies which act as autoantibodies, directed against autoantigens. Below we have listed some of the important antibodies for specific diseases:

  • SLE - Anti- ds DNA, Anti-Sm
  • Drug induced SLE - Anti-histone
  • Sjogren's - Anti-Ro
  • Diffuse cutaneous systemic sclerosis - anti-topoisomerase 1
  • Limited cutaneous systemic sclerosis - anti-centromere
  • Myositis - anti-SRP
  • Microscopic polyangiitis - ANCA MPO (pANCA)
  • Polyarteritis nodosa (PAN) - usually ANCA-negative
  • Granulomatous polyangiitis - ANCA PR3 (cANCA)
  • Rheumatoid arthritis - Rheumatoid factor Ab

p-ANCA: perinuclear staining of neutrophils (anti-MPO).

Image: “P ANCA” by Simon Caulton, CC BY-SA 3.0, via Wikimedia Commons.

c-ANCA: granular cytoplasmic staining of neutrophils (anti-PR3).

Image: “C ANCA” by Simon Caulton, CC BY-SA 3.0, via Wikimedia Commons.

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