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Related Experiment Videos

Quinolone hypersensitivity.

Paolo Campi1, Werner J Pichler

  • 1Allergy Clinic, Nuovo Ospedale San Giovanni di Dio, Florence, Italy. allergy@asf.toscana.it

Current Opinion in Allergy and Clinical Immunology
|July 17, 2003
PubMed
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Quinolone antibiotics can trigger immune reactions affecting various organs. Studies show these hypersensitivity reactions involve specific antibodies and T-cells, with significant cross-reactivity between different quinolone drugs.

Area of Science:

  • Immunology
  • Pharmacology
  • Dermatology

Background:

  • Quinolones are widely used antibacterials with potential for severe hypersensitivity reactions.
  • Understanding the immunological mechanisms and cross-reactivity is crucial for managing these adverse drug events.

Purpose of the Study:

  • To elucidate the immunological mechanisms behind quinolone-induced hypersensitivity.
  • To investigate the extent of cross-reactivity among different quinolone antibiotics.

Main Methods:

  • Development of an assay to detect quinolone-specific IgE antibodies.
  • Detection and cloning of quinolone-specific T-cells from patients with drug exanthemas.
  • In-vitro testing for cross-reactivity with related compounds.

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Main Results:

  • Specific IgE antibodies were found in over 50% of patients with immediate-type quinolone reactions, often cross-reacting with related drugs.
  • Specific T-cells reactive to ciprofloxacin were identified in maculopapular drug exanthemas.
  • Approximately 50% of these T-cell clones exhibited cross-reactivity to related quinolone compounds.

Conclusions:

  • Quinolone hypersensitivity involves diverse immunological mechanisms.
  • In-vitro findings indicate that cross-reactivity between quinolone drugs is a common phenomenon.