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Related Experiment Videos

Isonicotinic acid hydrazide as an antigen.

K Fujiwara1, T Saita, T Shimoda

  • 1Faculty of Pharmaceutical Sciences, Nagasaki University, Japan.

The Journal of Allergy and Clinical Immunology
|October 1, 1987
PubMed
Summary
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Researchers detected specific IgE antibodies to isoniazid (INH) in patients with hypersensitivity and tuberculosis. This finding advances understanding of INH drug reactions and allergy mechanisms.

Area of Science:

  • Immunology
  • Pharmacology
  • Clinical Medicine

Background:

  • Isoniazid (INH) is a primary drug for tuberculosis treatment.
  • Detection of specific antibodies to INH in humans has not been previously reported.
  • Immediate-type hypersensitivity reactions to INH can occur.

Purpose of the Study:

  • To investigate the presence of circulating antibodies specific to isoniazid (INH) in humans.
  • To characterize the type of antibody involved in INH hypersensitivity.
  • To explore the prevalence of INH-specific IgE in tuberculosis patients treated with INH.

Main Methods:

  • Enzyme-linked allergosorbent test (ELISA) was employed for antibody detection.
  • Sera from a patient with a history of INH hypersensitivity were analyzed.

Related Experiment Videos

  • Sera from 150 tuberculosis patients treated with INH were screened for INH-specific IgE.

    • Main Results:

    • Reaginic antibodies (IgE) specific to INH were detected in a patient with isoniazid hypersensitivity.
    • Preliminary tests showed INH-specific IgE in the serum of 2 out of 150 tuberculosis patients treated with INH.
    • This study reports the first in vitro serologic detection of INH-specific IgE in humans.

    Conclusions:

    • The presence of INH-specific IgE antibodies is demonstrated in humans.
    • This finding suggests a potential role for IgE in immediate-type hypersensitivity reactions to isoniazid.
    • Further research is warranted to understand the clinical significance and diagnostic utility of INH-specific IgE.