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Partial Myeloperoxidase Deficiency in Preleukemia

Overview
Journal Blut
Specialty Hematology
Date 1983 Jul 1
PMID 6305446
Citations 2
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Abstract

In seven subjects with partial and apparently acquired form of myeloperoxidase (MPO) deficiency, some functional properties of neutrophils (PMNs) were studied. Five patients suffered from preleukemia, one from diabetes mellitus and one from carcinoma of the breast with bone marrow metastases. Intracellular bactericidal activity, oxygen consumption and superoxide radical production were within normal limits. In three patients with preleukemia, the serum opsonic activity was markedly reduced (less than m-3SD) in an autologous system, but normal in the presence of pooled normal serum. Decreased opsonic activity was also found when these patient's sera were assayed in the presence of normal PMNs. Since the levels of IgG and C3 were comparable in the patients' sera and the pooled serum, a deficiency of another unknown opsonin or the presence of an opsonization inhibitor has to be postulated. The partial MPO defect apparently doesn't decrease the intracellular killing of Staphylococcus aureus by PMNs. The known susceptibility to bacterial infections in preleukemia may be explained by the reduction of serum opsonization conducing to a secondary decrease of the ingestion and killing of bacteria by the PMNs.

Citing Articles

Myeloperoxidase: a front-line defender against phagocytosed microorganisms.

Klebanoff S, Kettle A, Rosen H, Winterbourn C, Nauseef W J Leukoc Biol. 2012; 93(2):185-98.

PMID: 23066164 PMC: 3545676. DOI: 10.1189/jlb.0712349.


Superoxide anion production and expression of cytochrome b 558 by neutrophils are impaired in some patients with myelodysplastic syndrome.

Itoh Y, Kuratsuji T, Aizawa S, Sai M, Ohyashiki K, Toyama K Ann Hematol. 1991; 63(5):270-5.

PMID: 1659916 DOI: 10.1007/BF01698377.

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