Seasonal variation in mussel Mytilus edulis digestive gland cytochrome P4501A- and 2E-immunoidentified protein levels and DNA strand breaks (Comet assay)

J P Shaw, A T Large, J K Chipman, D R Livingstone, L D Peters

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34 Citations (Scopus)

Abstract

Mytilus edulis digestive gland microsomes were prepared from indigenous populations sampled from a clean reference site (Port Quin) and an urban-industrial contaminated site (Blackpool) in the UK. Samples were collected in March/April, May, August and December 1998. Western blot analysis was performed using polyclonal antibodies to fish CYP1A and rat CYP2E using partially purified M. edulis CYP as a positive control, to aid identification. CYP1A- and CYP2E-immunopositive protein levels showed different site-specific seasonal variation with higher levels of CYP2E determined in May (P <0.05). At both sites, lower levels of CYP1A-immunopositive protein but not CYP2E-immunopositive protein were observed in the samples collected in December (P <0.05). This correlated with lower levels of nuclear DNA damage (Comet assay expressed as per cent tail DNA) observed in December compared to August (P <0.05).
Original languageEnglish
Pages (from-to)405-9
Number of pages5
JournalMarine Environmental Research
Volume50
Issue number1-5
Publication statusPublished - 2000

Keywords

  • Microscopy, Fluorescence
  • Bivalvia
  • Comet Assay
  • Animals
  • Digestive System
  • Seasons
  • Cytochrome P-450 CYP1A1
  • Cytochrome P-450 CYP2E1

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