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Pharmacology JoVE (Open Access) Citable · DOI

Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity

DOI: 10.3791/3263-v
What you'll learn
  • ✓ Prepare covalent drug-protein conjugates for immunological testing
  • ✓ Characterize drug conjugate coupling rates and physicochemical properties
  • ✓ Perform basophil activation test to detect IgE-mediated drug hypersensitivity
  • ✓ Interpret BAT results for drug allergy diagnosis and mechanism investigation
Protocol

Basophil activation test is a potent tool for the detection of IgE-dependent allergies in vitro. Here, an optimized protocol for basophil activation test is used to investigate drug hypersensitivity. A method for the efficient production of covalent drug-protein conjugates and their physicochemical characterization is described.

Difficulty
advanced
Total time
~3–5 days (conjugate preparation 1–2 days, characterization 1 day, BAT assay 1–2 days)
Model organism
Human basophils (ex vivo primary cells or cell line)
Biosafety
BSL-2

Steps

1
Prepare covalent drug-protein conjugates

Synthesize drug-protein conjugates using optimized coupling chemistry to create hapten-carrier complexes. This step is essential for presentation of drug epitopes to patient basophils.

▶ 01:46
2
Determine coupling rate of drug conjugates

Characterize physicochemical properties and quantify drug-to-protein coupling efficiency using analytical methods. Validates conjugate quality prior to functional testing.

▶ 03:11
3
Perform basophil activation test with drug conjugates

Expose patient basophils to drug-conjugate complexes and measure activation markers (CD63, CD203c) by flow cytometry. Detects IgE-dependent responses in hypersensitive individuals.

▶ 04:40
4
Interpret BAT results for drug hypersensitivity diagnosis

Analyze basophil activation patterns to confirm IgE-mediated mechanisms and differentiate true allergic responses from non-immune adverse effects. Supports clinical diagnostic assessment.

▶ 07:32
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