Project description:The comparative transcriptomic analysis of chicken stem cells defines a chicken set of pluripotency associated genes that is almost coincident with mammalian pluripotency-assocaited genes. A total of 5944 differentially expressed unique identifiers (target IDs) were defined for CEF, 5942 for BM2 cells, 4550 for cES, 5465 for PGC and 5522 for cBC. Chicken Blastodermal cells (cBC) were taken from stage IX-XII (Eyal-Giladi & Kochav, 1976) embryos,chicken embryonic stem (cES) cells were established, amplified on inactivated STO feeder cells in proliferative medium containing cytokines and growth factors as described (Pain et al., 1996, Lavial et al., 2007). Long term cultured primordial germ cells (PGCs) were derived from 48h embryonic blood and maintained as described (McDonald et al., 2010). The non-tumorigenic BM2 monocytic cell line was grown as described (Solari et al., 1996). Primary chicken Embryonic fibroblasts (CEF) were prepared from 11-12 day old embryos according to standard protocols (Gandrillon et al., 1987), maintained and homogenised for 3-4 passages before being used as a somatic cell control. RNAs were extracted using Trizol (Invitrogen) according to the manufacturer and microarray analysis performed in biological triplicate.
Project description:The present investigation was to identify the signaling and metabolic pathways of expressed genes by microarray comparison between Primordial Germ Cells (PGCs) and their somatic counterpart, chicken embryonic fibroblasts (CEFs). We identified a total of 2,605 expressed transcripts. Among these, 1,197 were predominantly expressed in PGCs, and 1,408 were predominantly expressed in CEFs.
Project description:Chicken primordial germ cells (PGCs) have an epigenetic signature which differs from the one that mammalian PGCs acquire with their epigenome reprogramming during early embryonic development. In particular, chicken PGCs display a high global amount of histone H3 lysine 9 trimethylation (H3K9me3) compared to somatic cell types. We performed the genome-wide profiling of H3K9me3 and the transcriptome analysis on chicken PGCs compared to embryonic stem cells (ESCs) as a closely related, non germinal cell type.
Project description:Chicken primordial germ cells (PGCs) have an epigenetic signature which differs from the one that mammalian PGCs acquire with their epigenome reprogramming during early embryonic development. In particular, chicken PGCs display a high global amount of histone H3 lysine 9 trimethylation (H3K9me3) compared to somatic cell types. We performed the genome-wide profiling of H3K9me3 and the transcriptome analysis on chicken PGCs compared to embryonic stem cells (ESCs) as a closely related, non germinal cell type.
