2022
DOI: 10.1186/s12915-022-01404-1
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Epigenetic machinery is functionally conserved in cephalopods

Abstract: Background Epigenetic regulatory mechanisms are divergent across the animal kingdom, yet these mechanisms are not well studied in non-model organisms. Unique features of cephalopods make them attractive for investigating behavioral, sensory, developmental, and regenerative processes, and recent studies have elucidated novel features of genome organization and gene and transposon regulation in these animals. However, it is not known how epigenetics regulates these interesting cephalopod features… Show more

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Cited by 11 publications
(7 citation statements)
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References 117 publications
(244 reference statements)
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“…[38] Early investigators in the DNA methylation field entertained the idea that it functioned as a broad mechanism of gene silencing. This was supported by findings that methylation of regulatory elements, either when introduced by experimental manipulation [47,48] or by pathological changes, such as cancer, [49] correlated with gene silencing. This paradigm has infiltrated textbooks and prominent review articles, but there is scant evidence supporting the notion that DNA methylation plays anything but a backstage role in regulating gene expression under physiological conditions.…”
Section: Dna Methylation: Pattern and Functionmentioning
confidence: 69%
“…[38] Early investigators in the DNA methylation field entertained the idea that it functioned as a broad mechanism of gene silencing. This was supported by findings that methylation of regulatory elements, either when introduced by experimental manipulation [47,48] or by pathological changes, such as cancer, [49] correlated with gene silencing. This paradigm has infiltrated textbooks and prominent review articles, but there is scant evidence supporting the notion that DNA methylation plays anything but a backstage role in regulating gene expression under physiological conditions.…”
Section: Dna Methylation: Pattern and Functionmentioning
confidence: 69%
“…More recently, however, many studies have shifted in focus towards the potential use of methylation to determine age in wildlife. This followed the great successes in human and murine mouse models and the accumulating evidence that methylation is conserved across most vertebrate (Jarman et al ., 2015), and even invertebrate (Macchi, Edsinger & Sadler, 2022), species. Thus far, methylation clocks for age determination have been developed or tested in more than 50 species across six classes in less than 10 years, including reptiles and bird species for which other biological clocks were not suitable.…”
Section: Discussionmentioning
confidence: 99%
“…However, the relationship between DNA methylation and TEs appears species-specific in most invertebrates. For instance, in molluscs, DNA methylation outside of gene bodies occurs preferentially in some young TE classes in the bivalve C. gigas , yet the TE-rich genomes of cephalopods do not show strong TE methylation [39, 41]. Likewise, among all studied annelids, the association between DNA methylation and TEs, regardless of the class, is more pronounced and perhaps unique to O. fusiformis (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…Molluscs and annelids are species-rich spiralian clades with more conservatively evolving genomes [28]. In molluscs, studies of DNA methylation have primarily focused on bivalves (e.g., the oyster Crassostrea gigas) and cephalopods [36][37][38][39][40][41], revealing generally low-tomoderate methylation levels (~10% mCG). Base-resolution profiling in adult tissues with whole-genome bisulphite sequencing confirmed a mosaic 5mC landscape that concentrates in gene bodies of highly expressed genes and in young genic TEs of bivalves but not cephalopods [39,41].…”
Section: Introductionmentioning
confidence: 99%