Effects of thermal stress and nickel exposure on biomarkers responses in Mytilus galloprovincialis (Lam)

Hajer Attig, Naouel Kamel, Susanna Sforzini, Alessandro Dagnino, Jebali Jamel, Hamadi Boussetta, Aldo Viarengo, Mohamed Banni

Research output: Contribution to journalArticlepeer-review

Abstract

The present work aimed to assess the Mytilus galloprovincialis digestive gland biomarkers responses to nickel (Ni) exposure along with a heat stress gradient. Mussels were exposed to a sublethal dose of nickel (13 μM) along with a temperature gradient (18 °C, 20 °C, 22 °C, 24 °C and 26 °C) for 4 days. Metallothionein (MTs) content was assessed as specific response to metals. Catalase (CAT), glutathione S-transferase (GST) activities and malondialdehyde (MDA) were measured as biomarkers of oxidative stress and lipid peroxidation. The cholinergic system was monitored using the acetylcholinesterase activity (AChE). Moreover, Ni uptakes along with the exposure temperatures were assessed. A correlation matrix (CM) between the investigated biomarkers and the exposure temperatures and a Principal Component Analysis (PCA) were achieved. Our data showed a negative effect of temperature increase on mussel's antioxidant and detoxification response to Ni exposure being more pronounced in animals exposed to the 24 °C and 26 °C.

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalMarine Environmental Research
Volume94
DOIs
Publication statusPublished - Mar 2014
Externally publishedYes

Keywords

  • Biomarker response
  • Global warming
  • Heat stress
  • Mussels
  • Nickel
  • Oxidative stress

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