Autor(es): F. Grilo, Tiago ; Lopes, Ana Rita ; Sampaio, Eduardo ; Rosa, Rui ; Cardoso, Patrícia G.
Data: 2018
Identificador Persistente: http://hdl.handle.net/10451/41204
Origem: Repositório da Universidade de Lisboa
Assunto(s): Trochus histrio; Ocean warming and acidification; Gender differences; Heat shock response; Lipid peroxidation; Antioxidant enzymes
Given scarcity of knowledge on gender ecophysiological responses of tropical marine organisms to global climate change, the major aim of this research was to investigate potential sex differences in oxidative status of topshell Trochus histrio, after a combined exposure to increased temperature and pCO2. Lipid peroxidation, heat-shock response and antioxidant enzymatic activities were evaluated. Lipid peroxidation varied differently between sexes, with males undergoing cellular damage under high pCO2, which was elevated temperature-counteracted. Heat shock response was thermo- and sex-regulated, with males exhibiting significantly higher heat shock proteins production than females. Catalase activity increased with temperature and was exacerbated in combination with hypercapnia, being highest in females, while glutathione S-transferases activity peaked in males. These results clearly support the existence of distinct physiological strategies to cope oxidative stress between sexes, apparently more efficient in females, and also reinforce for the need of encompassing sex as meaningful variable in future biomarker studies.
