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

• Published in: Developmental and comparative immunology 2019-02, Vol.91, p.17-25
• Main Authors: Lafont, Maxime, Goncalves, Priscila, Guo, Ximing, Montagnani, Caroline, Raftos, David, Green, Timothy
• Format: Article
• Language: English
• Subjects: Adaptive immunology; Animal biology; Animals; Crassostrea - immunology; Crassostrea gigas; DNA Virus Infections - immunology; DNA Viruses - physiology; Eggs; Exposure; Female; Fish Diseases - immunology; Gene expression; Genetics; Immune system; Immunity; Immunity, Innate; Immunity, Maternally-Acquired; Immunology; Innate immunity; Invertebrate Zoology; Larva; Larvae; Life Sciences; Male; Maternal Exposure; OsHV-1; Ovum - immunology; Ovum - virology; Oysters; Paternal Exposure; Pathogens; Poly (I:C); Poly I-C - immunology; Priming; Provisioning; Ribonucleic acid; RNA; RNA-seq; Spawning; Survival; Trained immunity; Transgenerational immune priming; Viral Vaccines - immunology
• ISSN: 0145-305X; 1879-0089; 1879-0089
• DOI: 10.1016/j.dci.2018.09.022

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. •The molecular mechanism involved in transgenerational immune priming was investigated in Crassostrea gigas.•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 that parental exposure to poly(I:C) reconfigures antiviral gene expression in unchallenged larvae.•Improved survival of larvae might occur via maternal provisioning of antiviral compounds in the eggs.