Identification of somatic memory genes during bovine nuclear reprogramming by transcriptome sequencing
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ABSTRACT:
ORGANISM(S): Bos taurus
PROVIDER: GSE124100 | GEO | 2019/10/19
REPOSITORIES: GEO
Similar Datasets
Project description:Differentiated cell can be reprogrammed into totipotent embryo through somatic cell nuclear transfer (SCNT). However, this process is highly inefficient and most cloned embryos arrest at certain developmental stages. Through single cell sequencing combined with embryo biopsy, here we generate a global map of DNA methylome and RNA transcriptome for SCNT embryos with distinct developmental fates. We subsequently demonstrate that the unfaithful reactivation of two histone demethylases, Kdm4b and Kdm5b, accounts for the arrest of cloned embryos at 2-cell and 4-cell stage, respectively. Ectopic expression of Kdm4b and Kdm5b in SCNT can remove H3K9me3 barrier, restore the transcription profile and facilitate the blastocyst developmental efficiency over 95%. Moreover, these cloned embryos can further support full-term development and the derivation of SCNT-embryonic stem cells with greater efficiency. Our study reveals that histone methylation reset is crucial for the development of SCNT embryos, which provides a clue to further improve therapeutic cloning. Examination of histone H3K9me3 modifications in 2-cell embryos and cumulus cells.
2016-05-17 | E-GEOD-70606 | biostudies-arrayexpress
Project description:Differentiated cell can be reprogrammed into totipotent embryo through somatic cell nuclear transfer (SCNT). However, this process is highly inefficient and most cloned embryos arrest at certain developmental stages. Through single cell sequencing combined with embryo biopsy, here we generate a global map of DNA methylome and RNA transcriptome for SCNT embryos with distinct developmental fates. We subsequently demonstrate that the unfaithful reactivation of two histone demethylases, Kdm4b and Kdm5b, accounts for the arrest of cloned embryos at 2-cell and 4-cell stage, respectively. Ectopic expression of Kdm4b and Kdm5b in SCNT can remove H3K9me3 barrier, restore the transcription profile and facilitate the blastocyst developmental efficiency over 95%. Moreover, these cloned embryos can further support full-term development and the derivation of SCNT-embryonic stem cells with greater efficiency. Our study reveals that histone methylation reset is crucial for the development of SCNT embryos, which provides a clue to further improve therapeutic cloning. For SCNT embryos 4-8 replicates were performed for each stage . As the control, 3 replicates were performed for each stage of wild type samples
2016-05-17 | E-GEOD-70607 | biostudies-arrayexpress
Project description:Differentiated cell can be reprogrammed into totipotent embryo through somatic cell nuclear transfer (SCNT). However, this process is highly inefficient and most cloned embryos arrest at certain developmental stages. Through single cell sequencing combined with embryo biopsy, here we generate a global map of DNA methylome and RNA transcriptome for SCNT embryos with distinct developmental fates. We subsequently demonstrate that the unfaithful reactivation of two histone demethylases, Kdm4b and Kdm5b, accounts for the arrest of cloned embryos at 2-cell and 4-cell stage, respectively. Ectopic expression of Kdm4b and Kdm5b in SCNT can remove H3K9me3 barrier, restore the transcription profile and facilitate the blastocyst developmental efficiency over 95%. Moreover, these cloned embryos can further support full-term development and the derivation of SCNT-embryonic stem cells with greater efficiency. Our study reveals that histone methylation reset is crucial for the development of SCNT embryos, which provides a clue to further improve therapeutic cloning. For SCNT embryos or injected SCNT embryos 3-8 replicates were performed for each stage . As the control, 3-6 replicates were performed for each stage of wild type samples
2016-05-17 | E-GEOD-70605 | biostudies-arrayexpress
Project description:Global hypermethylations of histone H3 lysine 9 (H3K9) tri- and di-methylation (H3K9me3/2) have been identified in bovine cloned embryos at the embryonic genome activation (EGA) stage (eight-cell stage), but the intrinsic reason for these anomalies remains elusive. To ascertain key factors responsible for aberrant H3K9 methylation, we performed RNA sequencing of transcripts in eight-cell bovine in vitro fertilized (IVF) and SCNT embryo. From the differentially expressed genes (DEGs) between IVF and SCNT embryos, we identified that the unsuccessful reactivation of two histone demethylases, KDM4D and KDM4E, is responsible for the incomplete H3K9me3/2 demethylation in SCNT embryos at the EGA stage. By mRNA injection, ectopic expression of either KDM4D or KDM4E could erase H3K9me3/2 barriers, improve blastocyst formation, and elevate cloning efficiency of bovine SCNT. To examine the detailed genes responsive to KDM4E overexpression, we also performed RNA sequencing of bovine eight-cell SCNT embryos with KDM4E compensation and found an obvious restoration of global transcriptional patterns in SCNT embryos. Our study first provides the transcriptome data set of bovine IVF and SCNT embryos during EGA with or without KDM4E overexpression, which advance the understanding of incomplete nuclear reprogramming, and contribute to the practical implications for genetically modified livestock breeding using SCNT.
2018-01-16 | GSE99294 | GEO
Project description:Differentiated cell can be reprogrammed into totipotent embryo through somatic cell nuclear transfer (SCNT). However, this process is highly inefficient and most cloned embryos arrest at certain developmental stages. Through single cell sequencing combined with embryo biopsy, here we generate a global map of DNA methylome and RNA transcriptome for SCNT embryos with distinct developmental fates. We subsequently demonstrate that the unfaithful reactivation of two histone demethylases, Kdm4b and Kdm5b, accounts for the arrest of cloned embryos at 2-cell and 4-cell stage, respectively. Ectopic expression of Kdm4b and Kdm5b in SCNT can remove H3K9me3 barrier, restore the transcription profile and facilitate the blastocyst developmental efficiency over 95%. Moreover, these cloned embryos can further support full-term development and the derivation of SCNT-embryonic stem cells with greater efficiency. Our study reveals that histone methylation reset is crucial for the development of SCNT embryos, which provides a clue to further improve therapeutic cloning.
2016-05-17 | GSE70607 | GEO
Project description:Differentiated cell can be reprogrammed into totipotent embryo through somatic cell nuclear transfer (SCNT). However, this process is highly inefficient and most cloned embryos arrest at certain developmental stages. Through single cell sequencing combined with embryo biopsy, here we generate a global map of DNA methylome and RNA transcriptome for SCNT embryos with distinct developmental fates. We subsequently demonstrate that the unfaithful reactivation of two histone demethylases, Kdm4b and Kdm5b, accounts for the arrest of cloned embryos at 2-cell and 4-cell stage, respectively. Ectopic expression of Kdm4b and Kdm5b in SCNT can remove H3K9me3 barrier, restore the transcription profile and facilitate the blastocyst developmental efficiency over 95%. Moreover, these cloned embryos can further support full-term development and the derivation of SCNT-embryonic stem cells with greater efficiency. Our study reveals that histone methylation reset is crucial for the development of SCNT embryos, which provides a clue to further improve therapeutic cloning.
2016-05-17 | GSE70606 | GEO
Project description:Differentiated cell can be reprogrammed into totipotent embryo through somatic cell nuclear transfer (SCNT). However, this process is highly inefficient and most cloned embryos arrest at certain developmental stages. Through single cell sequencing combined with embryo biopsy, here we generate a global map of DNA methylome and RNA transcriptome for SCNT embryos with distinct developmental fates. We subsequently demonstrate that the unfaithful reactivation of two histone demethylases, Kdm4b and Kdm5b, accounts for the arrest of cloned embryos at 2-cell and 4-cell stage, respectively. Ectopic expression of Kdm4b and Kdm5b in SCNT can remove H3K9me3 barrier, restore the transcription profile and facilitate the blastocyst developmental efficiency over 95%. Moreover, these cloned embryos can further support full-term development and the derivation of SCNT-embryonic stem cells with greater efficiency. Our study reveals that histone methylation reset is crucial for the development of SCNT embryos, which provides a clue to further improve therapeutic cloning.
2016-05-17 | GSE70605 | GEO
Project description:As a histone hallmark for transcription repression, Histone H3 lysine 27 trimethylation (H3K27me3) plays important roles in mammalian embryo development and induced pluripotent stem cells (iPSCs) generation. However, the expression profile and roles of H3K27me3 in bovine somatic cell nuclear transfer (SCNT) reprogramming remain poorly understood. In this study, we find SCNT embryos exhibit global hypermethylation of H3K27me3 from two-cell to eight-cell stage and its removal by ectopically expressed H3K27me3 demethylase-KDM6A could greatly improves SCNT efficiency. To illuminate the mechanism of improving SCNT reprogramming efficiency of KDM6A overexpression, we performed RNA sequencing of transcripts in SCNT morula with or without KDM6A overexpression. RNA-seq reveal that KDM6A overexpression could enhance transcription of genes mainly involved cell adhesion and cellular metabolism process, as well as X-linked genes. We first provides the transcriptome data of bovine SCNT morula with or without KDM6A overexpression. Meanwhile, we compared the differences of transcriptome between SCNT eight-cell embryos and morula. Our study provide a more promising approach to improving the efficiency of SCNT reprogramming and contribute to understanding the mechanism of first cell fate determine during embryo development in bovine.
2019-01-31 | GSE114596 | GEO
Project description:Somatic cell nuclear transfer (SCNT) into an enucleated oocyte can reprogram a differentiated nucleus to a totipotent state. However, the time course of transcriptional reprogramming has not been determined. To monitor the inactivation of somatic genes after SCNT in the bovine model system, we determined transcript levels of 159 genes highly expressed in fetal fibroblast nuclear donor cells, but not in metaphase II recipient oocytes. For 18 of these genes significantly higher transcript levels were found in four-cell SCNT embryos compared with four-cell embryos derived by in vitro fertilization (IVF), indicating incomplete silencing of somatic genes at this stage. RNA sequencing revealed that nearly 600 genes with no transcripts in oocytes were activated in eight-cell IVF embryos, in agreement with major embryonic genome activation (EGA). De novo transcription in SCNT embryos was delayed (16 genes before the 16-cell stage, 300 and >800 genes at the 16-cell and blastocyst stages). Intron-containing primary transcripts as another option to detect embryonic gene transcription revealed activation of >2,200 genes in IVF embryos at the eight-cell stage, while only 828 genes were activated in SCNT embryos. At the 16-cell stage, a higher number of activated genes was found in SCNT (1,917) than in IVF embryos (738). Self-organizing tree algorithm clustering confirmed that in SCNT embryos transcription of genes that are normally activated during major EGA is delayed. Our study provides detailed insight into the timing of genome activation in cloned embryos that is substantially different from IVF embryos in spite of similar developmental kinetics.
2021-05-31 | GSE125828 | GEO
Project description:Somatic cell nuclear transfer (SCNT) into an enucleated oocyte can reprogram a differentiated nucleus to a totipotent state. However, the time course of transcriptional reprogramming has not been determined. To monitor the inactivation of somatic genes after SCNT in the bovine model system, we determined transcript levels of 159 genes highly expressed in fetal fibroblast nuclear donor cells, but not in metaphase II recipient oocytes. For 18 of these genes significantly higher transcript levels were found in four-cell SCNT embryos compared with four-cell embryos derived by in vitro fertilization (IVF), indicating incomplete silencing of somatic genes at this stage. RNA sequencing revealed that nearly 600 genes with no transcripts in oocytes were activated in eight-cell IVF embryos, in agreement with major embryonic genome activation (EGA). De novo transcription in SCNT embryos was delayed (16 genes before the 16-cell stage, 300 and >800 genes at the 16-cell and blastocyst stages). Intron-containing primary transcripts as another option to detect embryonic gene transcription revealed activation of >2,200 genes in IVF embryos at the eight-cell stage, while only 828 genes were activated in SCNT embryos. At the 16-cell stage, a higher number of activated genes was found in SCNT (1,917) than in IVF embryos (738). Self-organizing tree algorithm clustering confirmed that in SCNT embryos transcription of genes that are normally activated during major EGA is delayed. Our study provides detailed insight into the timing of genome activation in cloned embryos that is substantially different from IVF embryos in spite of similar developmental kinetics.
2021-05-31 | GSE125724 | GEO