Summary
Accessory glands of the cockroach are composed of secretory and supportive cells, the latter providing a skeleton-like framework of attentuated cytoplasmic processes into which the former are positioned. These two cell types are associated with one another laterally by adhaering, pleated septate, and gap junctions. Hemi-adhaerens junctions are also found on both luminal and basal surfaces of the gland; the former are associated with the cuticular lining of the lumen and the latter with extracellular matrix. The adhering and septate junctions are flanked by both filaments and microtubules; the former insert into the junctional membranes and are actin-like, binding both rhodamine-conjugated phalloidin and the S1 subfragment of rabbit heavy meromyosin. The role of this cytoskeletal protein with the cellular junctions has been explored by treatment with a disruptive agent, cytochalasin D. Dissociation of actin leads to changes in septate junctions and in microtubular distribution. This suggests that the latter act as anchors for the actin filaments which, in turn, appear bound to certain of the intramembranous junctional components.
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Supported by a Conicet/Royal Society Visiting Fellowship
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Lane, N.J., Flores, V. The role of cytoskeletal components in the maintenance of intercellular junctions in an insect. Cell Tissue Res 262, 373–385 (1990). https://doi.org/10.1007/BF00309892
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DOI: https://doi.org/10.1007/BF00309892