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Title

Immune genes, IL1β and Casp9, show sexual dimorphic methylation patterns in zebrafish gonads

AuthorsCaballero-Huertas, M.; Moraleda, J.; Joly, Sílvia CSIC ORCID ; Ribas, Laia CSIC ORCID
KeywordsImmune
Epimarkers
Methylation
Gene expression
Gonads
Issue DateFeb-2020
PublisherAcademic Press
CitationFish and Shellfish Immunology 97: 648-655 (2020)
AbstractThere is crosstalk between the immune and reproductive systems in which sexual dimorphism is a common pattern in vertebrates. In recent years, epigenetics has emerged as a way to study the molecular mechanisms involved in gonadal development, those responsible for integrating environmental information that contribute to assigning a specific sexual phenotype (either an ovary or a testis). The knowledge of epigenetic mechanisms in certain molecular processes allows the development of epigenetic markers. In fish gonads, the existence of reproduction-immune system interactions is known, although the epigenetic mechanisms involved are far from clear. Here, we used the zebrafish (Danio rerio) as a model to study the DNA methylation patterns in gonads of two well-known innate immune genes: IL1β and Casp9. DNA methylation levels were studied by a candidate gene approach at single nucleotide resolution and gene expression analyses were also carried out. Results showed that there was clear sexual dimorphism in the DNA methylation levels of the two immune genes studied, being significantly higher in the testes when compared to the ovaries. In summary, and although further research is needed, this paper presents sexual dimorphic methylation patterns of two immune-related genes, thus sex-biased differences in methylation profiles should considered when analyzing immune responses in fish. Data showed here can help to develop epimarkers with forthcoming applications in livestock and fish farming production, for example, in immune fish diseases or sexual control programs as epigenetic molecular tools to predict environmental pressure in the gonads
Description8 pages, 6 figures, supplementary data https://doi.org/10.1016/j.fsi.2019.12.013
Publisher version (URL)https://doi.org/10.1016/j.fsi.2019.12.013
URIhttp://hdl.handle.net/10261/199903
DOIhttp://dx.doi.org/10.1016/j.fsi.2019.12.013
Identifiersissn: 1050-4648
e-issn: 1095-9947
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