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American Journal of Pathology, Vol 134, 15-26, Copyright © 1989 by American Society for Investigative Pathology

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Rapid fragmentation and reorganization of Golgi membranes during frustrated phagocytosis of immobile immune complexes by macrophages

DF Bainton, R Takemura, PE Stenberg and Z Werb
Department of Pathology, University of California, San Francisco 94143- 0506.

The authors have observed the rapid reorganization of the cellular membranes of macrophages during Fc receptor-mediated frustrated phagocytosis of immune complex-coated surfaces. As the macrophages spread, large, clear basal vacuoles and anastamosing tubules were formed, occasionally contiguous with the adherent surface. Coated vesicles also were observed. This process was accompanied by a rapid reorganization of the Golgi complex region of the macrophages, which was observed using trimetaphosphatase histochemistry and an antibody to a Golgi membrane antigen as markers. On contact of the macrophages with the immune complexes, the Golgi complexes, which were tightly clustered around the centrioles, dispersed into vesicles and reorganized near the basal surface. The Golgi cisternae swelled, fragmented, and decreased in number. Golgi membrane antigen was found in the large basal vacuoles and also associated with the adherent basal surface of the macrophages. This indicates that the Golgi complexes were reorganized, in part, by a direct recruitment of their membranes to the increasing basal surface area of the spreading macrophages. The changes in the structure of the Golgi complexes were reversible; by 2 hours, the complexes had recovered their normal organization, with an accompanying decrease in the number of large basal vacuoles. These data suggest that the dynamic interrelationship among the Golgi membranes, intracellular vacuoles, and the plasma membrane can be perturbed by membrane spreading on a nonphagocytosable surface.

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