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Dev Comp Immunol. 2019 Feb;91:17-25. doi: 10.1016/j.dci.2018.09.022. Epub 2018 Sep 29.

Transgenerational plasticity and antiviral immunity in the Pacific oyster (Crassostrea gigas) against Ostreid herpesvirus 1 (OsHV-1).

Author information

1
Sydney Institute of Marine Science, Chowder Bay, Sydney, Australia; IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, France.
2
Sydney Institute of Marine Science, Chowder Bay, Sydney, Australia; Macquarie University, Department of Biological Sciences, Sydney, Australia.
3
Haskin Shellfish Research Laboratory, Rutgers University, Port Norris, NJ, USA.
4
IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, France.
5
Sydney Institute of Marine Science, Chowder Bay, Sydney, Australia; Macquarie University, Department of Biological Sciences, Sydney, Australia. Electronic address: timothy.green@viu.ca.

Abstract

The oyster's immune system is capable of adapting upon exposure to a pathogen-associated molecular pattern (PAMP) to have an enhanced secondary response against the same type of pathogen. This has been demonstrated using poly(I:C) to elicit an antiviral response in the Pacific oyster (Crassostrea gigas) against Ostreid herpesvirus (OsHV-1). Improved survival following exposure to poly(I:C) has been found in later life stages (within-generational immune priming) and in the next generation (transgenerational immune priming). The mechanism that the oyster uses to transfer immunity to the next generation is unknown. Here we show that oyster larvae have higher survival to OsHV-1 when their mothers, but not their fathers, are exposed to poly(I:C) prior to spawning. RNA-seq provided no evidence to suggest that parental exposure to poly(I:C) reconfigures antiviral gene expression in unchallenged larvae. We conclude that the improved survival of larvae might occur via maternal provisioning of antiviral compounds in the eggs.

KEYWORDS:

Crassostrea gigas; OsHV-1; RNA-seq; Trained immunity; Transgenerational immune priming

PMID:
30278186
DOI:
10.1016/j.dci.2018.09.022

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