Age-related toxic effects and recovery from okadaic acid treatment in Enchytraeus crypticus (Annelida: Oligochaeta).
The effects of 48 h okadaic acid (OA) treatment and the ability to recover the induced toxicological injuries were examined in Enchytraeus crypticus of different ages (25 days and 3 months). The results demonstrated that the older worms are more sensitive to the toxin and show less capacity to recover. After 48 h OA treatment, the structural organization of the chloragogenous tissue appeared modified and associated with an immune response involving a higher number of circulating coelomocytes immunoreactive to anti-IL-6 antibody. The toxin effects were more evident in 3-month-old animals compared to specimens aged 25 days. Regarding the morpho-functional recovery from the induced modifications, first signs of recuperation were observed in younger worms at 48 h, and recovery was almost complete within 1 week. In older animals, the morphology of the chloragogenous tissue had not been restored, while a reduction in coelomocyte number was found after 1 week.
Franchini
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Department of Animal Biology, University of Modena and Reggio Emilia, via Campi 213/D, 41100 Modena, Italy. antonella.franchini@unimore.it
Ottaviani
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D000367:Age Factors; D000818:Animals; D019319:Okadaic Acid / Q000633:toxicity*; D009835:Oligochaeta / Q000187:drug effects* / Q000276:immunology / Q000502:physiology
D019319:Okadaic Acid