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Eosinophil protein X concentration is dependent on eosinophil concentration
C J Pronk-Admiraal1, P C Bartels
1Department of Clinical Chemistry, Haematology and Immunology, Medical Centre Alkmaar, The Netherlands.
European Journal of Clinical Chemistry and Clinical Biochemistry : Journal of the Forum of European Clinical Chemistry Societies
|May 1, 1997
Summary
Higher eosinophil counts correlate with increased serum eosinophil protein X. However, lower counts indicate more protein X release per cell, impacting clinical interpretation for conditions like asthma.
Area of Science:
- Immunology
- Hematology
Background:
- Eosinophils play a role in allergic inflammation.
- Eosinophil Protein X (EPX) is a marker of eosinophil activation.
Purpose of the Study:
- To investigate the relationship between eosinophil concentration and serum EPX levels.
- To compare these levels in atopic versus non-atopic individuals.
Main Methods:
- Analysis of blood samples from 80 subjects.
- Measurement of eosinophil counts and serum EPX concentrations.
- Statistical comparison between atopic and non-atopic groups.
Main Results:
- Serum EPX concentration increases with higher eosinophil counts.
- Individuals with lower eosinophil counts release more EPX per cell.
- Atopic subjects have higher eosinophil and EPX concentrations but a lower EPX/eosinophil ratio.
Conclusions:
- The EPX/eosinophil ratio varies with eosinophil count.
- Clinical interpretation of EPX as an activation marker requires considering the absolute eosinophil count.
- This is crucial for conditions such as asthma.