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Can thrombocytes participate in the removal of cellular debris in the blood circulation of teleost fish? A cytochemical study and ultrastructural analysis

Can thrombocytes participate in the removal of cellular debris in the blood circulation of... Introduction The role of piscine thrombocytes in defense mechanisms has been the subject of controversy ( Kolman et al., 2003 ; Köllner et al., 2004 ; Passantino et al., 2005 ) because the phagocytic role of thrombocytes has not been elucidated. In different teleosts the phagocytic ability of thrombocytes to various substances (bacteria and other antigens) has been reported ( Slierendrecht et al., 1995 ; Hill and Rowley, 1996 ; Burrows et al., 2001 ; Stosik et al., 2001 ; Kolman et al., 2003 ). However, this ability has been questioned by Meseguer et al. (2002) because no evidence of digestion by thrombocytes has been reported. In piscine thrombocytes the process of adhesion and ingestion are affected by various concentrations of humoral factors of innate defense mechanisms that are present in fish blood ( Kolman et al., 2003 ). Phagocytosis also depends on lysosomal enzymes, high‐energy metabolism and cellular recognition ( Pellizzon and Lunardi, 2000 ). Thus it has been suggested that thrombocytes have important substances for phagocytosis activity, such as glycogen ( Zinkl et al., 1991 ; Passantino et al., 2005 ; Tavares‐Dias and Barcellos, 2005 ; Tavares‐Dias, 2006 ), acid ( Zinkl et al., 1991 ; http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Ichthyology Wiley

Can thrombocytes participate in the removal of cellular debris in the blood circulation of teleost fish? A cytochemical study and ultrastructural analysis

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References (16)

Publisher
Wiley
Copyright
Copyright © 2007 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0175-8659
eISSN
1439-0426
DOI
10.1111/j.1439-0426.2007.00850.x
Publisher site
See Article on Publisher Site

Abstract

Introduction The role of piscine thrombocytes in defense mechanisms has been the subject of controversy ( Kolman et al., 2003 ; Köllner et al., 2004 ; Passantino et al., 2005 ) because the phagocytic role of thrombocytes has not been elucidated. In different teleosts the phagocytic ability of thrombocytes to various substances (bacteria and other antigens) has been reported ( Slierendrecht et al., 1995 ; Hill and Rowley, 1996 ; Burrows et al., 2001 ; Stosik et al., 2001 ; Kolman et al., 2003 ). However, this ability has been questioned by Meseguer et al. (2002) because no evidence of digestion by thrombocytes has been reported. In piscine thrombocytes the process of adhesion and ingestion are affected by various concentrations of humoral factors of innate defense mechanisms that are present in fish blood ( Kolman et al., 2003 ). Phagocytosis also depends on lysosomal enzymes, high‐energy metabolism and cellular recognition ( Pellizzon and Lunardi, 2000 ). Thus it has been suggested that thrombocytes have important substances for phagocytosis activity, such as glycogen ( Zinkl et al., 1991 ; Passantino et al., 2005 ; Tavares‐Dias and Barcellos, 2005 ; Tavares‐Dias, 2006 ), acid ( Zinkl et al., 1991 ;

Journal

Journal of Applied IchthyologyWiley

Published: Dec 1, 2007

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