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Related Experiment Videos

Complement-binding anti-Jka not detectable by DiaMed gels

P O'Brien1, L Hopkins, D McCarthy

  • 1Department of Haematology and Blood Transfusion, St. Vincent's Hospital, Dublin, Ireland.

Vox Sanguinis
|March 3, 1998
PubMed
Summary
This summary is machine-generated.

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A specific anti-Jka antibody was undetectable with the DiaMed-ID system but detectable with other methods. This was due to ID-Diluent 2 interfering with complement binding in indirect antiglobulin tests.

Area of Science:

  • Transfusion Medicine
  • Immunohaematology
  • Antibody Detection

Background:

  • An anti-Jka antibody was undetectable using the DiaMed-ID Micro Typing System, despite reactivity with other indirect antiglobulin test (IAT) methods.
  • The antibody became detectable in the DiaMed-ID system when the manufacturer-recommended diluent (ID-Diluent 2) was replaced with alternative low ionic strength saline (LISS) solutions.

Observation:

  • The anti-Jka antibody was identified as a complement-dependent antibody.
  • Reactivity was observed in all IATs except when ID-Diluent 2 was used.

Findings:

  • ID-Diluent 2 inhibited the detection of the complement-dependent anti-Jka antibody.
  • Further investigation revealed that ID-Diluent 2 prevents haemolysis by ABO antibodies and binds calcium ions.

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Implications:

  • The findings question the suitability of diluents that inhibit complement activation and bind calcium in IAT systems utilizing anti-complement reagents.
  • Careful selection of diluents is crucial for accurate antibody identification in blood banking.
  • This highlights the importance of understanding diluent properties in serological testing.