Endocrine cells in the oesophagus of the ascidian Styela clava, a cytochemical and immunofluorescence study

Cell and Tissue Research
P J Bevis, M C Thorndyke


Immunocytochemical studies have demonstrated the occurrence of an insulin-immunoreactive cell type in the oesophageal epithelium of the Ascidian Styela clava. Staining with aldehyde fuchsin has demonstrated a number of similar small, triangular, cells located on the basement membrane, which may have an endocrine function. Argyrophilic cells have also been found, suggesting the presence of a second endocrine cell type. The absence of argentaffin cells has led us to believe that the cells so far observed do not produce biogenic amines such as 5-HT (5-Hydroxytryptamine). The nature of these cells is discussed with reference to endocrine-like cells found in the digestive tracts of other protochordates.


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Related Concepts

Basement Membrane
Epithelial Cells
Immunofluorescence Assay
Insulin B Chain

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