Ultrastructure of the peritoneal exudate cells of seawater teleosts,seabream (Sparus aurata) and sea bass (Dicentrarchus labrax) |
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Authors: | J Meseguer M A Esteban J Muñoz A López-Ruiz |
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Institution: | (1) Department of Cell Biology, Faculty of Biology, University of Murcia, E-30 100 Murcia, Spain |
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Abstract: | The peritoneal exudates of seabream and sea bass consist of granulocytes, lymphocytes and macrophages. These cells show conspicuous ultrastructural differences from the same cell-types of blood and head-kidney, which have not been reported previously. Peritoneal exudate granulocytes differ from their corresponding circulating or head-kidney forms in the following way: (a) they are larger in size, and (b) their abundant cytoplasmic granules have some new ultrastructural features, and a new granule population might also be present. Likewise, lymphocytes also show a noticeable difference; they contain a sparse population of small dense cytoplasmic granules. Monocytes, macrophages, and transitional forms between these two cell-types, are also found. The percentage of peritoneal exudate cell-types is different in seabream and sea bass. Macrophages in sea bass represent the most abundant peritoneal exudate cell-type. However, seabream shows lower percentages of macrophages than granulocytes. |
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Keywords: | Peritoneum Peritoneal exudate cell (PEC) Granulocytes Lymphocytes Macrophages Sparus aurata Dicentrarchus labrax (Teleostei) |
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