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February 5, 2026Clinical Chemistry and Laboratory Medicine (CCLM)0 citationsOpen Access

Improved IgG4 Detection in Anti-GBM Disease with Modified Assays

Laboratory solution to diagnose and monitor atypical IgG4-mediated anti-GBM disease

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Authors

JJJoannes F.M. JacobsALAnnechien J.A. LambeckRLRosa G.M. Lammerts

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Overview

Proof-of-concept study reveals enhanced detection of atypical IgG4-mediated anti-GBM disease with modifications to diagnostic assays.

Key Points

  • The study aims to improve the diagnosis of atypical IgG4-mediated anti-GBM disease by enhancing detection methods.
  • Distributed serum samples from a patient to 36 laboratories for diagnostic assessment.
  • Replaced standard anti-IgG conjugate with anti-IgG4 conjugate in the fluorescent enzyme immunoassay.
  • Assessed the performance of the modified assay in detecting IgG4 anti-GBM antibodies.
  • Initial diagnostic tests showed persistent negative results for IgG anti-GBM.
  • Histopathological analysis revealed predominant IgG4 deposits along the GBM.
  • The modified IgG4-GBM test successfully diagnosed and monitored an additional patient.

Cite This Study

Jacobs et al. (2026) studied this question.

synapsesocial.com/papers/69843398f1d9ada3c1fb0cdahttps://doi.org/10.1515/cclm-2025-1499
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