Abstract
Mast cells from 15 different cat organs were examined in terms of distribution and protease activity. The number of mast cells in each site was found to vary when visualised by metachromatic staining using Alcian Blue. Enzyme histochemical analysis revealed the existence of two subtypes of mast cells. These were categorised based on protease content, i.e. whether the mast cells contained chymase or tryptase. Tryptase-positive mast cells were clearly identifiable in every organ examined, whereas chymase-containing mast cells were predominantly observed in the ear (skin), tongue, spleen, and submucosa of the stomach and rectum. The chymase-reactive cells were not detected in the heart, or in the muscularis or serosa of the duodenum, jejunum, ileum or rectum. In addition, we suggest the existence of another subtype of mast cell containing both chymase and tryptase and localised within the ear (skin), tongue, spleen and submucosa of the rectum.
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Noviana, D., Kono, F., Nagakui, Y. et al. Distribution and Enzyme Histochemical Characterisation of Mast Cells in Cats. Histochem J 33, 597–603 (2001). https://doi.org/10.1023/A:1016324515108
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DOI: https://doi.org/10.1023/A:1016324515108