• N. Engl. J. Med. · Dec 1977

    Case Reports

    Malakoplakia: evidence for monocyte lysosomal abnormality correctable by cholinergic agonist in vitro and in vivo.

    • N I Abdou, C NaPombejara, A Sagawa, C Ragland, D J Stechschulte, U Nilsson, W Gourley, I Watanabe, N J Lindsey, and M S Allen.
    • N. Engl. J. Med. 1977 Dec 29; 297 (26): 141314191413-9.

    AbstractWe studied monocyte function in a case of malakoplakia in an attempt to characterize the immune defect in this condition. Our patient's intracellular cyclic-GMP levels were abnormally low (mean +/- S.D. of 0.17 +/- 0.05 pmol per 10(7) malakoplakia cells, versus 0.79 +/- 0.12 in normals) p less than 0.001). After phagocytosis, his monocytes failed to release beta-glucuronidase. In the bactericidal assay, incubation of the patient's monocytes with Escherichia coli allowed growth of 542 +/- 46 colonies, normal monocytes allowed 95 +/- 22 (p less than 0.001). The percentage of monocytes with large lysosomal granules was 23 +/- 4 in the patient and 4 +/- 2 in normal controls. After in vitro incubation of the patient's cells or in vivo treatment with bethanechol chloride, the cyclic-GMP levels, bactericidal ability and lysosomal granules of the cells returned to normal levels. Low levels of cyclic-GMP could impair lysosomal function and bacterial killing in this condition. Cholinergic agonists correct the in vitro abnormalities and are beneficial in vivo.

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