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D4 and C2 assessed for chimerism and germline transmission

ABSTRACT: Two independent ES cell lines (D4 and C2) were assessed for chimerism and germline transmission. Although these lines were able to produce chimerism at early passage, no germ line transmission was seen. After passaging in a proprietary medium and subcloning by detaching loosely connected cells and culturing in the recommended medium, both lines experienced an increase in potential as evidenced by an enhanced ability to go germ line. Analysis of early passage, and late passage detached and attached cells will allow the determination of genes that may be implicated in the increase of potential seen in these cells. Note: additional replicates may be added at a later date. Keywords: embryonic stem cells, chimerism, germline transmission

ORGANISM(S): Mus musculus

PROVIDER: GSE4087 | GEO | 2006/01/24

SECONDARY ACCESSION(S): PRJNA95241

REPOSITORIES: GEO

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Project description:A number of environmental factors (e.g. toxicants) have been shown to promote the epigenetic transgenerational inheritance of disease and phenotypic variation. Transgenerational inheritance requires the germline transmission of altered epigenetic information between generations in the absence of direct environmental exposures. The primary periods for epigenetic programming of the germline is associated with primordial germ cell development and during fetal gonadal sex determination. The current study examined the actions of an agricultural fungicide vinclozolin on gestating female (F0 generation) progeny in regards to the primordial germ cell (PGC) epigenetic reprogramming of the F3 generation (i.e. great-grandchildren). The F3 generation primordial germ cell transcriptome and epigenome (DNA methylation) was altered transgenerationally. Interestingly, the differential DNA methylation regions (DMR) and altered transcriptomes were distinct between the onset of gonadal sex determination at embryonic day 13 (E13) and after cord formation in the testis at embryonic day 16 (E16). A larger number of DMR and transcriptional alterations were observed in the E13 PGC than E16 germ cells. Observations demonstrate an altered transgenerational epigenetic reprogramming and function of the primordial germ cells and subsequent male germline is a component of vinclozolin induced epigenetic transgenerational inheritance of disease. Insights into the molecular control of germline transmitted epigenetic inheritance are provided. The combined observations demonstrate ancestral exposure of a gestating female during fetal gonadal sex determination can promote transgenerational alterations in the primordial germ cell and subsequent male germline epigenetic and transcriptional programming. This altered germline programming leads to the epigenetic transgenerational inheritance of disease and phenotypic variation. Observations support the role of the primordial germ cell programming in the molecular mechanism involved and provides insights into the molecular mechanisms that control the epigenetic transgenerational inheritance phenomena. Results suggest a cascade of epigenetic and transcriptional events during germ cell development is needed to obtain the mature germline epigenome that is then transmitted transgenerationally. RNA samples from PGC of 2 F3-control lineage groups were compared to PGC of 2 F3-vinclozolin lineage groups for two embryonic age E13 and E16

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D4 and C2 assessed for chimerism and germline transmission

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