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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.
P Cech, and
M Markert, and
L H Perrin
January 1982,
Acta haematologica,
P Cech, and
M Markert, and
L H Perrin
April 1982,
The Journal of laboratory and clinical medicine,
P Cech, and
M Markert, and
L H Perrin
March 1988,
Hematology/oncology clinics of North America,
P Cech, and
M Markert, and
L H Perrin
January 1998,
Ryoikibetsu shokogun shirizu,
P Cech, and
M Markert, and
L H Perrin
January 2000,
Ryoikibetsu shokogun shirizu,
P Cech, and
M Markert, and
L H Perrin
January 1990,
Hematologic pathology,
P Cech, and
M Markert, and
L H Perrin
January 1977,
Acta haematologica,
P Cech, and
M Markert, and
L H Perrin
July 1990,
American journal of diseases of children (1960),
