Ultrastructural,cytochemical and functional studies on the eosinophilic granulocytes of larval lampreys |
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Authors: | Dr Andrew F Rowley Mark Page |
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Institution: | (1) Department of Zoology, University College of Swansea, Singleton Park, Swansea, UK;(2) Department of Zoology, University College of Swansea, SA28PP Singleton Park, Swansea, UK;(3) Present address: Department of Anatomy, St. George's Hospital Medical School, Cranmer Terrace, Tooting, SW17 ORE London |
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Abstract: | Summary Blood from larval lampreys (ammocoetes) contains a small number of eosinophilic granulocytes which are formed in the protospleen and kidney. Both immature and mature forms of this cell type are present in the blood and these are easily identified from other cell types due to the prominent eosinophilic granules that fill the cytoplasm. Ultrastructurally, these granules are electron-dense, largely unstructured, Golgi-derived and contain acid phosphatase but not peroxidase. Eosinophilic granulocytes ingest bacteria but fail to internalise colloidal carbon. The functional and phylogenetic significance of these cells is discussed. |
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Keywords: | Eosinophilic granulocytes Phagocytosis Cytochemistry Comparative haematology Acid phosphatase Lampreys ammocoetes |
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