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Infect Immun. 1979 May; 24(2): 558-561

Effects of anionic inhibitors of phagosome-lysosome fusion in cultured macrophages when the ingested organism is Mycobacterium lepraemurium.

ABSTRACT

The mouse pathogen Mycobacterium lepraemurium is readily phagocytosed by cultured mouse peritoneal macrophages. Ingestion is normally followed by fusion between phagosomes and lysosomes. The influence of some aninonic compounds known to inhibit fusion in other systems was investigated by transmission electron microscopy after ingestion of M. lepraemurium. Fusion was markedly, although temporarily, inhibited by suramin and moderately inhibited by poly-D-glutamic acid. The effects are, however, not sufficient to permit these agents to be used to study the long-term effects of shutting off the secondary lysosome-phagosome fusion system in cultured macrophages infected with M. lepraemurium.

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