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Assay variables and early clinical evaluation of low-angle light scattering for platelet function analysis
Galina S Svidelskaya1,2,3, Vera P Sorkina1, Anastasia A Ignatova1
1National Medical Research Center of Pediatric Hematology, Oncology and Immunology Named After Dmitry Rogachev, Russian Ministry of Healthcare, Moscow, Russian Federation.
International Journal of Hematology
|October 22, 2024
Summary
The low-angle light scattering (LaSca) method for platelet aggregation is stable and sensitive. Pediatric patients showed reduced initial aggregation velocity compared to healthy children, indicating potential diagnostic value.
Area of Science:
- Hematology
- Clinical Chemistry
- Biomedical Engineering
Background:
- A novel low-angle light scattering (LaSca) technique assesses platelet aggregation and shape change using minimal platelet-rich plasma (PRP).
- This method offers advantages in sample volume requirements and data acquisition.
Purpose of the Study:
- To investigate preanalytical and analytical variables impacting the LaSca platelet aggregation assay.
- To validate the LaSca method in a pediatric hematology setting.
Main Methods:
- Platelet aggregation induced by ADP in diluted PRP with 2 mM calcium at 23°C.
- Study groups included healthy adults (n=30), healthy children (n=20), and pediatric patients (n=25) with suspected platelet function abnormalities.
Main Results:
- Assay parameters remained stable for up to 3 hours post-PRP isolation and were sensitive to plasma dilutions between 2-8%.
- Pediatric patients exhibited significantly reduced initial aggregation velocity compared to healthy children (p<0.05).
- ADP-induced light transmission amplitude moderately correlated with LaSca aggregation amplitude in healthy children (r=0.52, p<0.05) but not in pediatric patients.
Conclusions:
- Standardized protocol for LaSca platelet aggregation assessment.
- Characterized critical preanalytical and analytical variables influencing the assay.
- Demonstrated potential for LaSca in identifying altered platelet function in pediatric patients.
