PMID: 18621197Jan 1, 1992Paper

Ring-shaped organization of cytoskeletal F-actin associated with surface sensory receptors of Schistosoma mansoni: a confocal and electron microscopic study

Tissue & Cell
Y Zhou, R B Podesta


The surface syncytial epithelium of the human blood fluke, Schistosoma mansoni, contains numerous ciliated or unciliated, bulb-shaped sensory receptors. At the ultrastructure level, sensory receptors with similar topographic and morphological structures have been found in the epithelial surface layers of all known species of schistosomes and other species of flatworm parasites. Although many studies have focused on the syncytial cytoskeleton of schistosomes, while some other studies have examined the fine structures of the syncytial sensory receptors, no-one has demonstrated the association of cytoskeletal elements with the surface sensory cells except the well-known microtubules associated with ciliated structures. The present study, using confocal laser scanning microscopy combined with scanning and transmission electron microscopies, demonstrates the association of ring-shaped F-actin within the epithelial sensory receptors. The F-actin rings can be characterized into two types according to their size, density, and distribution. The actin rings found in the syncytia of both the male and female schistosomes appear to be more dense and larger in size than the actin rings located only at the central regions of the tuberculated ...Continue Reading


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