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Mast Cell Activation Syndrome.

Owen N Kramer1, Marla S Barkoff2, Claudia Hernandez3

  • 1University of Illinois at Chicago College of Medicine, Chicago, IL.

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Summary
This summary is machine-generated.

A woman developed persistent urticaria and facial swelling after starting a pyrroloquinoline quinone supplement. Her symptoms were refractory to antihistamines, suggesting a complex hypersensitivity reaction.

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Area of Science:

  • Dermatology
  • Immunology
  • Toxicology

Background:

  • A 51-year-old woman with asthma and Hashimoto's thyroiditis presented with persistent urticaria.
  • She reported recent initiation of a pyrroloquinoline quinone (PQQ) supplement.

Observation:

  • Urticaria was accompanied by transient facial swelling and dyspnea.
  • Facial swelling was triggered by fish, nuts, and NSAIDs.
  • The patient also experienced chronic diarrhea, memory decline, and anomic aphasia.

Findings:

  • Allergy testing was negative; diagnoses of lactose intolerance and GERD were previously made.
  • Laboratory studies revealed positive antithyroperoxidase antibodies and elevated total complement activity.
  • Urticaria became refractory to fexofenadine treatment.

Implications:

  • This case highlights a potential adverse reaction to pyrroloquinoline quinone supplements.
  • The complex presentation suggests a possible link between PQQ, autoimmune conditions, and hypersensitivity.
  • Further investigation into PQQ's immunomodulatory effects and potential toxicity is warranted.