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Updated: Jul 20, 2025

Application of Biochip Microfluidic Technology to Detect Serum Allergen-specific Immunoglobulin E sIgE
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Standardizing In Vitro β-Lactam Antibiotic Allergy Testing with Synthetic IgE.

Pedro Quintero-Campos1, Roberto Gozalbo-Rovira2,3, Jesús Rodríguez-Díaz2,3

  • 1Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València-Universitat de València, 46022 Valencia, Spain.

Analytical Chemistry
|August 7, 2023
PubMed
Summary
This summary is machine-generated.

A new synthetic IgE antibody specific to beta-lactam antibiotics was developed. This tool improves beta-lactam allergy testing accuracy and aids in standardizing diagnostic assays for better patient care and antimicrobial resistance management.

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Area of Science:

  • Immunology
  • Drug Allergy Research
  • Diagnostic Assay Development

Background:

  • Global prevalence of beta-lactam allergy complicates antibiotic administration.
  • Lack of standardized IgE antibody pools hinders in vitro allergy testing validation.

Purpose of the Study:

  • To develop a synthetic IgE specific to beta-lactam antibiotics.
  • To create a standardized tool for beta-lactam allergy diagnostics and research.

Main Methods:

  • Phage display technology to construct human single-chain antibody fragments (scFv) targeting amoxicillin.
  • Baculovirus expression system to produce a complete human synthetic IgE molecule.
  • Utilized synthetic IgE as a standard in a chemiluminescence immunoassay for allergy testing.

Main Results:

  • Achieved a detection limit of 0.05 IU/mL (0.63 pM) with 100% specificity.
  • Demonstrated four-fold higher clinical sensitivity (73%) compared to reference assays in 150 serum samples.
  • Synthetic IgE served as a reliable trueness control material.

Conclusions:

  • Synthetic IgE facilitates standardization of beta-lactam allergy diagnostic tests.
  • Enables reliable interlaboratory comparisons and accurate patient labeling.
  • Highlights potential for synthetic antibodies in drug allergy diagnostics and reference material generation.