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Tissue Distribution and Structure of Barrier Cells in the Hematopoietic and Lymphoid Organs of Salmonids by F. Álvarez; E. Flaño; A. Castillo; P. López-Fierro; B. Razquin; A. Villena is a Medicine article available to read on EtoBox.

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Background: Barrier cells have been recognized as a discrete group of fibroblastic-or myofibroblastic-like cells located in the lymphoid and hematopoietic organs of mammals. This paper reports the results of a morphological study of the main lymphoid organs of three salmonid species, in which cells structurally similar to the mammalian barrier cells were observed in healthy animals. Methods: The spleen, kidney, and thymus of fingerlings of rainbow trout, Oncorhynchus mykiss, and Coho salmon, Omorhymhus kisutch, and of adult brown trout, Sulmo truttu furio, were processed for electron microscopy study using various fixation methods. Semithin sections were used for the Periodic Acid-Schiff (PAS) staining technique, and for the demonstration of the endogenous peroxidase activity. Results: The kidney and spleen of all the species contained a variable, but usually low, number of electron-dense, elongated, and branched cells, ultrastructurally similar to the mammalian barrier cells. They also occurred in the thymus of some brown trout and Coho salmon, but not of rainbow trout. The electron density of this cell type was present after the various types of fixation procedures. They show num

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Author

F. Álvarez; E. Flaño; A. Castillo; P. López-Fierro; B. Razquin; A. Villena

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0003-276X)

Published

1996

Language

EN

Field

Medicine (Health Sciences)