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Updated: Aug 7, 2026
Fast and Specific Assessment of the Halogenating Peroxidase Activity in Leukocyte-enriched Blood Samples
Published on: July 28, 2016
Neutrophil myeloperoxidase: a simple, reproducible technique to determine activity
Abstract:
Neutrophil MPO deficiency has been rarely documented. This is because of the low incidence of infections in these individuals and the lack of use of various screening techniques which would detect them. Using the Hemalog D, we have identified one completely deficient and 18 partially deficient subjects. These subjects were studied by staining their peripheral blood smears for MPO and grading the intensity of the stain on 100 consecutive neutrophils (MPO score) as well as by chemically quantifying the MPO activity. There is an excellent correlation between MPO score and quantitated MPO activity. The MPO score is a simple semiquantitative method to estimate MPO activity.
Insights
Neutrophil myeloperoxidase (MPO) deficiency is rare, but a new method identified one complete and 18 partial deficiencies. This simple MPO scoring technique correlates well with quantitative MPO activity measurements.
Area of Science:
- Hematology
- Clinical Chemistry
- Immunology
Background:
- Neutrophil myeloperoxidase (MPO) deficiency is infrequently reported.
- Low infection rates and limited screening contribute to underdiagnosis.
- MPO plays a crucial role in neutrophil antimicrobial activity.
Purpose of the Study:
- To identify individuals with MPO deficiency using the Hemalog D system.
- To evaluate the MPO score as a reliable method for assessing MPO activity.
- To establish a correlation between MPO score and quantitative MPO activity.
Main Methods:
- Utilized the Hemalog D system for subject identification.
- Performed peripheral blood smear staining for MPO.
- Graded MPO staining intensity on 100 neutrophils (MPO score).
- Quantified MPO activity chemically.
Main Results:
- Identified one subject with complete MPO deficiency.
- Detected 18 subjects with partial MPO deficiency.
- Demonstrated an excellent correlation between MPO score and quantitative MPO activity.
- Validated the MPO score as a semiquantitative measure of MPO activity.
Conclusions:
- The Hemalog D system can identify MPO deficient individuals.
- The MPO score is a simple, reliable, and semiquantitative method for assessing MPO activity.
- Further research may improve diagnosis and understanding of MPO deficiency.
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