Journal article
Intercellular junctions in the water-blood barrier of the gill lamella in the adult lamprey (Geotria australis, Lampetra fluviatilis)
Cell and Tissue Research, Vol.274(3), pp.521-532
1993
Abstract
Thin sections and freeze-fracture replicas of the water-blood barrier in the gill lamellae of adult lampreys (Geotria australis, Lampetra fluviatilis) demonstrate that the occluding junctions between epithelial pavement cells differ markedly from those between 'endothelial' pillar cells in the structure and arrangement of their strands. The zonulae occludentes between pavement cells typically consist of complex networks of 4-6 strands, the mean number of which undergoes a small but significant decline when the animal is acclimated to seawater. In comparison, the occluding junctions between pillar cells are less elaborate and may represent maculae or fasciae, rather than zonulae occludentes. They do not apparently undergo a change when the animal enters saltwater. The results indicate that the main part of the paracellular diffusion barrier to proteins and ions is located in the epithelium rather than the endothelium. Communicating (gap) junctions are present between adjacent pavement cells, between pavement and basal cells and between pillar cells. These findings suggest that the epithelial cells and the pillar cells in the water-blood barrier of lampreys both form 'functional syncytia'. The results are discussed in the context of ion-transporting epithelia in other aquatic vertebrates.
Details
- Title
- Intercellular junctions in the water-blood barrier of the gill lamella in the adult lamprey (Geotria australis, Lampetra fluviatilis)
- Authors/Creators
- H. Bartels (Author/Creator) - Hochschule HannoverI.C. Potter (Author/Creator) - Murdoch University
- Publication Details
- Cell and Tissue Research, Vol.274(3), pp.521-532
- Publisher
- Springer Verlag
- Identifiers
- 991005540235907891
- Murdoch Affiliation
- School of Biological and Environmental Sciences
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.116 Aquaculture Nutrition
- Web Of Science research areas
- Cell Biology
- ESI research areas
- Molecular Biology & Genetics