Journal
FISH & SHELLFISH IMMUNOLOGY
Volume 124, Issue -, Pages 505-512Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fsi.2022.04.044
Keywords
benzo[alpha]pyrene; Argopecten irradians; Peptidoglycan recognition proteins; Fibrinogen-domain-containing proteins; Metallothionein; Heat shock protein 70
Funding
- Korea Institute of Marine Science & Technology Promotion [20170392]
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Bay scallops exposed to different concentrations of BaP showed immune response changes, with higher concentrations of BaP suppressing immune response and reducing their ability to cope with oxidative stress and DNA damage.
Bay scallops were exposed to four BaP concentrations (0.5, 1.0, 10 and 50 mu g/L) for 72 h to elucidate their immune response. Immune parameters were evaluated by measuring nitric oxide (NO) levels in hemolymph. Additionally, we measured peptidoglycan recognition proteins (PGRP), fibrinogen-domain-containing protein (FReDC1), metallothionein (MT), and heat shock protein (HSP) 70 mRNA expression in digestive diverticula. NO as well as FReDC1 and MT expression in each BaP group increased significantly over time except for the BaP 0.5 group. The PGRP and HSP70 mRNA expression in the BaP 50 group increased in the range 6-24 h and then decreased. In situ hybridization also confirmed that there was higher MT mRNA expression in the BaP 50 group than in the control group at 72 h. Our results suggest that higher levels of BaP dampened scallop immune responses, while simultaneously reducing their ability to cope with oxidative stress and DNA damage. BaP exposure can be considered a potential immune inducer in bay scallop.
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