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Eosinophil peroxidase deficiency: morphological and immunocytochemical studies of the eosinophil-specific granules

G Zabucchi, MR Soranzo, R Menegazzi, M Vecchio, A Knowles, C Piccinini, P Spessotto and P Patriarca

Istituto di Patologia Generale, Universita di Trieste, Italy.

Five eosinophil peroxidase (EPO)-deficient subjects were identified from 131,000 peripheral blood samples examined for routine automated analysis. The EPO-deficient eosinophils of these subjects met the main criteria established for EPO deficiency: absent or strongly decreased reaction for peroxidase, absent or strongly decreased staining with Sudan Black, and an increased ratio of the granule core volume to the total granule volume. In this report we show that this granule alteration is caused mainly by a decrease of its volume, particularly of the matrix, and that two other matrix proteins, eosinophil cationic protein and eosinophil derived neurotoxin, appear to be present in normal amounts in the EPO-deficient granules.

Volume 80, Issue 11, pp. 2903-2910, 12/01/1992
Copyright © 1992 by The American Society of Hematology


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