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Biomedical subjects

J L Vilde

Publications and source records attributed to J L Vilde.

At least 109 records · Page 6Linked to original sources
PubMed1978

[Peroxidase deficiency in neutrophils in systemic mastocytosis (author's transl)].

A case associating a systemic mastocytosis and an acquired myeloperoxidase deficiency is reported. The myeloperoxydase deficiency is studied by cytochemical techniques in optical and electron microscopy and confirmed by biochemical measures. An important defect in bactericidal and candidacidal activity is demonstrated in vitro in P.N.M. The authors discuss the links between the two anomalies which might bring one more argument for the common origin of both granulocytes and mastocytes.

Blood Cells↗
PubMed1975

Partial myeloperoxidase deficiency in a case of preleukaemia. II. Defects of degranulation and abnormal bactericidal activity of blood neutrophils.

A patient with a refractory anaemia preceding acute myeloblastic leukaemia had an increased susceptibility to infection due to Staphylococcus aureus. 36% of neutrophils lacked myeloperoxidase (MPO) activity and, in vitro, these polymorphonuclear neutrophils (PMN) had a defect of bactericidal activity against Staphylococcus aureus. Cytochemical studies of phagocytosis with the electron miscroscope have shown that the degranulation of primary granules (MPO+ or MPO-) was normal after phagocytosis of Escherichia coli which were normally lysed. A defective destruction of Staphylococcus aureus and Candida albicans was observed in some PMN with or without MPO activity, suggesting that MPO deficiency itself was not the only cause of this defect. In PMN which appeared normal, most MPO(+) granules were unable to fuse with the phagocytic vacuole containing intact germs even after 90 min of contact. There was, therefore, in addition to a partial MPO deficiency, a defect in cellular degranulation. This defect, the mechanism of which is unknown, may be in part responsible for the defective bacterial degradation.

Blood Bactericidal Activity↗