Summary
The plasmatocytes are the major phagocytic blood-cell type in the haemolymph of the wax-moth, Galleria mellonella. In the present study, these cells were allowed to attach to tissue culture dishes for 1 h, rinsed and then incubated with latex beads for up to 72 h. These cells were then fixed for routine transmission electron microscopy and acid phosphatase cytochemistry. Intracellular latex particles were found in tight, ill-defined phagosomes, which were often clearly associated with the Golgi complexes of the plasmatocytes. Fusion of both primary lysosomes and multivesicular bodies with the phagosomes occasionally occurred and this resulted in the accumulation of an acid phosphatase positive reaction product around the test particles. Subsequent experiments showed that this acid phosphatase activity was mainly associated with the primary lysosomes. The results of the lysosome/latex interactions are compared with those obtained from similar studies on the digestive mechanisms in other phagocytes.
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We are grateful to Professor E.W. Knight-Jones in whose department this work was carried out and to Mrs. M. Colley for help in insect rearing. This work was supported by grants from the Royal Society and the Science Research Council (B/73/0176. and B/RG/2286.0)
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Rowley, A.F., Ratcliffe, N.A. An ultrastructural and cytochemical study of the interaction between latex particles and the haemocytes of the wax moth Galleria mellonella in vitro. Cell Tissue Res. 199, 127–137 (1979). https://doi.org/10.1007/BF00237732
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DOI: https://doi.org/10.1007/BF00237732