Disseminated neoplasia in cockles Cerastoderma edule: ultrastructural characterisation and effects on haemolymph cell parameters

Type Article
Date 2011-09
Language English
Author(s) Diaz Seila1, Renault Tristan2, Villalba Antonio1, Carballal María Jesús1
Affiliation(s) 1 : Ctr Invest Marinas, Xunta De Galicia 36620, Vilanova Arousa, Spain
2 : IFREMER, Lab Genet & Pathol, F-17390 Ronce Les Bains, La Tremblade, France
Source Diseases Of Aquatic Organisms (0177-5103), 2011-09 , Vol. 96 , N. 2 , P. 157-167
DOI 10.3354/dao02384
WOS© Times Cited 12
Abstract Disseminated neoplasia (DN) has been detected in cockles from various beds in Galicia (NW Spain). A study was performed to characterise cockle neoplastic cell ultrastructure and to evaluate the effect of this disease at different severity stages on various haemolymph cell parameters. Examination of cockle neoplastic cells with transmission electron microscopy (TEM) showed round shapes and a lack of pseudopods, a high nucleus:cytoplasm diameter ratio, Golgi complexes, abundant mitochondria, ribosomes, and numerous endoplasmic reticulum tubes and electron-lucent vesicles. Various haemolymph cell parameters (cell mortality, non-specific esterase and lysosome biovolume, reactive oxygen intermediates [ROI] production, phagocytosis ability, intracellular Ca2+ and actin levels) were compared between DN severity categories by flow cytometry; haemocyte mortality, non-specific esterase activities and lysosome biovolume were found to be higher with increasing DN severity. The phagocytic ability of neoplastic cells was sharply reduced with regard to haemocytes. The cytoplasmic-free Ca2+ level was higher and actin content lower in haemolymph cells of diseased cockles compared to unaffected ones. A significant increase in ROI production was detected in later stages of disease progression.
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Diaz Seila, Renault Tristan, Villalba Antonio, Carballal María Jesús (2011). Disseminated neoplasia in cockles Cerastoderma edule: ultrastructural characterisation and effects on haemolymph cell parameters. Diseases Of Aquatic Organisms, 96(2), 157-167. Publisher's official version : https://doi.org/10.3354/dao02384 , Open Access version : https://archimer.ifremer.fr/doc/00043/15468/