Related Experiment Video
Updated: Jul 31, 2026
04:32
A Uniform Shear Assay for Human Platelet and Cell Surface Receptors via Cone-plate Viscometry
Published on: June 5, 2019
A latex particle assay for platelet-associated IgG
R R Ramos1, B R Curtis, H Chaplin
1Department of Pathology, Washington University School of Medicine, St. Louis, Missouri.
Transfusion
|March 1, 1992
Summary
A new latex particle assay offers a sensitive and specific method for detecting platelet-associated IgG. This rapid, cost-effective test avoids radioactivity, making it a valuable alternative to radioimmunoassay.
Area of Science:
- Immunology
- Hematology
- Clinical Chemistry
Background:
- Platelet-associated IgG (PAIgG) detection is crucial for diagnosing immune thrombocytopenic disorders.
- Current methods like radioimmunoassay (RIA) involve radioactivity and can be time-consuming.
- There is a need for faster, safer, and equally sensitive diagnostic assays.
Purpose of the Study:
- To report a modified, sensitive, solid-phase assay for platelet-associated IgG.
- To compare the performance of a latex particle assay with a radioimmunoassay (RIA).
Main Methods:
- Development and validation of a direct latex particle assay for platelet-bound IgG.
- Simultaneous comparison of the latex assay with a 125I monoclonal radioimmunoassay (RIA) in 209 samples.
Main Results:
- The latex particle assay demonstrated high sensitivity (91%), specificity (100%), and overall efficiency (97%) compared to RIA.
- The direct latex test requires only 45 minutes from platelet-rich plasma.
- Crossmatching one patient with 12 donors takes 90 minutes using the latex assay.
Conclusions:
- The developed latex particle assay is a sensitive, specific, and efficient method for detecting platelet-associated IgG.
- This assay offers significant advantages over RIA, including absence of radioactivity, reagent stability, economy, and speed.
- The latex assay is a practical and advantageous alternative for clinical diagnostics.
