Data/hora: 10/06/2024 17:01:13

Provedor de dados: 	5	
País: 	France	
Título: 	Metabolism of the Pacific oyster,     Crassostrea gigas     , is influenced by salinity and modulates survival to the Ostreid herpesvirus OsHV-1	
Autores: 	Fuhrmann, Marine; Delisle, Lizenn; Petton, Bruno; Corporeau, Charlotte; Pernet, Fabrice.	
Data: 	2018-02	
Ano: 	2018	
Palavras-chave: 	Bivalve; Disease; Environment; Metabolism; Mortality risk; Salinity.	
Resumo: 	The Pacific oyster, Crassostrea gigas, is an osmoconforming bivalve exposed to wide salinity fluctuations. The physiological mechanisms used by oysters to cope with salinity stress are energy demanding and may impair other processes, such as defense against pathogens. This oyster species has been experiencing recurrent mortality events caused by the Ostreid herpesvirus 1 (OsHV-1). The objectives of this study were to investigate the effect of salinity (10, 15, 25 and 35‰) on energetic reserves, key enzyme activities and membrane fatty acids, and to identify the metabolic risk factors related to OsHV-1-induced mortality of oysters. Acclimation to low salinity led to increased water content, protein level, and energetic reserves (carbohydrates and triglycerides) of oysters. The latter was consistent with lower activity of hexokinase, the first enzyme involved in glycolysis, up-regulation of AMP-activated protein kinase, a major regulator of cellular energy metabolism, and lower activity of catalase, an antioxidant enzyme involved in management of reactive oxygen species. Acclimation to salinity also involved a major remodeling of membrane fatty acids. Particularly, 20:4n-6 decreased linearly with decreasing salinity, likely reflecting its mobilization for prostaglandin synthesis in oysters. The survival of oysters exposed to OsHV-1 varied from 43% to 96% according to salinity ( Fuhrmann et al., 2016). Risk analyses showed that activity of superoxide dismutase and levels of proteins, carbohydrates, and triglycerides were associated with a reduced risk of death. Therefore, animals with a higher antioxidant activity and a better physiological condition seemed less susceptible to OsHV-1.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00427/53886/54958.pdf

https://archimer.ifremer.fr/doc/00427/53886/54959.pdf

DOI:10.1242/bio.028134

https://archimer.ifremer.fr/doc/00427/53886/	
Editor: 	Company Of Biologists Ltd	
Formato: 	application/pdf	
Fonte: 	Biology Open (2046-6390) (Company Of Biologists Ltd), 2018-02 , Vol. 7 , N. 2 , P. bio028134 (10p.)	
Fonte: 	This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.

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