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Psoriatic arthritis and minocycline induced autoantibodies

D N Leitch1, D I Haslock

  • 1Department of Rheumatology, South Cleveland Hospital, Middlesbrough, Cleveland.

Insights

Minocycline can cause autoimmune reactions, including auto-antibodies and liver issues, complicating psoriatic arthritis diagnosis. This case highlights the importance of considering drug-induced autoimmunity in complex presentations.

Area of Science:

  • Rheumatology
  • Clinical Immunology
  • Pharmacology

Background:

  • Psoriatic arthritis is a chronic inflammatory condition.
  • Minocycline is an antibiotic sometimes used for inflammatory conditions.
  • Drug-induced autoimmunity is a known, albeit uncommon, side effect of certain medications.

Observation:

  • A patient presented with symptoms suggestive of psoriatic arthritis.
  • Diagnosis was initially challenging due to co-occurring hepatic dysfunction.
  • The patient also exhibited minocycline-induced auto-antibodies, including anti-dsDNA and anti-SCL 70.

Findings:

  • The presence of minocycline-induced auto-antibodies complicated the diagnostic pathway.
  • Hepatic dysfunction further obscured the clinical picture.
  • This case underscores the potential for minocycline to trigger autoimmune phenomena.

Implications:

  • Clinicians should consider drug-induced autoimmunity when evaluating patients with complex inflammatory conditions.
  • Awareness of minocycline's potential to induce auto-antibodies is crucial for accurate diagnosis.
  • Further research may elucidate the mechanisms behind minocycline-induced autoimmune responses.

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