Seasonal variation in the antioxidant defence systems of gill and digestive gland of the blue mussel, Mytilus edulis

Aisling Power, David Sheehan

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

Abstract

Seasonal variation in the level of glutathione (GSH) and in the activities of glutathione S-transferase (GST; EC 2.5.1.18), GSH-peroxidase (EC 1.11.1.9) and catalase (EC 1.11.1.6) in both the gill and digestive gland of the blue mussel (Mytilus edulis) sampled from Cork harbour were evaluated. GSH peroxidase activities are generally lowest in the period February-April. Catalase activity did not vary greatly over the year in the two tissues studied from two separate sampling sites. Levels are generally lower in the period December-April than in May-July. GSH levels fluctuated in both tissues with lowest levels occurring during the winter period. GST activity increases in the period September-March in gill tissue but does not vary significantly in digestive gland where levels are consistently lower. This enzyme may therefore carry out a tissue-specific role in protecting gill tissue against oxidative stress in winter.

Original languageBritish English
Pages (from-to)99-103
Number of pages5
JournalComparative Biochemistry and Physiology - C Pharmacology Toxicology and Endocrinology
Volume114
Issue number2
DOIs
StatePublished - Jun 1996

Keywords

  • antioxidants
  • detoxification
  • glutathione
  • glutathione S-transferase
  • mussels
  • Mytilus edulis
  • oxidative stress
  • seasonality

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