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Characterization of the Endometrial Transcriptome in Early Diestrus Influencing Pregnancy Establishment in Dairy Cattle after Transfer of In-Vitro Produced Embryos

ABSTRACT: In this study, we sequenced the RNA content of endometrial biopsies from Holstein cows at day 6-8 to identify candidate genes and describe biological mechanisms for endometrium receptivity and pregnancy establishment upon transfer of IVP embryos.

ORGANISM(S): Bos taurus

PROVIDER: GSE115756 | GEO | 2019/12/31

REPOSITORIES: GEO

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Identification of potential biomarkers in donor cows for in vitro embryo production by granulosa cells transcriptomics

Project description:In this study we sequenced RNA of granulosa collected from Holstein cows at oocyte aspiration prior to IVP, to identify candidate genes and biological mechanisms for favourable IVP-related traits in donor cows.

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High-concentrate feeding upregulates the expression of inflammation-related genes in the ruminal epithelium of dairy cattle

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Transcriptomics of the HPG axis from in vitro or in vivo-produced dairy male calves

Project description:In cattle, two of the most common technologies for embryo production are “in vivo” (MOET) or “in vitro” (IVP). IVP can sometimes impact fetal growth, resulting in large offspring, although most IVP calves are born apparently healthy. However, gene regulation changes in the organs involved in the developmental process in phenotypically normal postnatal calves are unknown and could indicate physiological programming. The objective of this study was to compare the transcriptomic modifications in organs of the hypothalamus-pituitary-gonadal and adrenal (HPGA) axes between IVP and MOET male calves of three months of age. RNA extracted from the HPGA organs samples (n=4 per group) were sequenced through RNAseq. The raw files were subjected to a bioinformatic pipeline to determine differentially expressed genes (FDR<0.05) in IVP versus MOET samples and the KEGG pathways enriched by these genes (FDR < 0.1). Pathways related to the reproductive process (GnRH secretion in hypothalamus, GnRH signaling in pituitary and steroidogenesis in testicle) were stimulated in IVP calves, suggesting an early activation of the HPG axis in male IVP calves when compared to MOET counterparts.

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Epigenomics of metabolic organs from in vitro or in vivo-produced dairy male calves

Project description:In cattle, two of the most common technologies for embryo production are “in vivo”, after multiple ovulation and embryo transfer (MOET), or “in vitro” (IVP). IVP can sometimes impact fetal growth, resulting in large offspring, although most IVP calves are born apparently healthy. However, gene regulation changes in the organs involved in the developmental process in phenotypically normal postnatal calves are unknown and could indicate physiological programming. The objective was to compare the epigenomic and transcriptomic modifications in the liver, muscle, and organs of the hypothalamus-pituitary-gonadal and adrenal (HPGA) axes between IVP and MOET male calves of three months of age. Pregnancies were monitored until delivery. Male calves were maintained in similar conditions during the postnatal period until euthanasia at around 100 days of age. There were no differences regarding body weight at birth and growth rate among the animals in both groups at this age.

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Transcriptomics of the liver and the muscle from in vitro or in vivo-produced dairy male calves

Project description:In cattle, the in vitro production (IVP) of embryos is becoming more relevant than embryos produced in vivo, i.e., after ovarian stimulation and embryo transfer (MOET). However, the effects of IVP on the developmental programming of specific organs in the postnatal calves are yet unknown. The objective of this study was to compare the hepatic and muscular transcriptomic modifications between IVP and MOET male calves of three months of age (n=4 per group). Tissue samples from liver and semitendinosus muscle were obtained at 3 months of age, and the extracted RNA was sequenced through RNAseq to determine differentially expressed genes (DEG; FDR<0.05). KEGG pathways enrichment analysis showed that DEG up-regulated in the liver and the muscle of the IVP calves were involved in oxidative phosphorylation and the tricarboxylic acid cycle. In contrast, ribosome and translation were up-regulated in the liver but down-regulated in the muscle of the IVP calves compared to the MOET calves (FDR<0.05). In conclusion, our findings indicated an altered hepatic and muscular energy regulation in phenotypically normal IVP calves compared to MOET calves.

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Characterization and Comparison of the Leukocyte Transcriptomes of Three Cattle Breeds

Project description:In this study, we use mRNA-Seq to characterize and compare the leukocyte transcriptomes of Holstein, Jersey, and Cholistani with respect to variations in sequence, expression, and splicing. Poly A+ RNA are extracted from leukocytes of pools of blood drawn from cows of three different breeds, Holstein, Jersey, and Cholistani. The objective of the study is to compare sequence variation and gene expression of the three cattle breeds.

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The Small RNA sequencing of 12 mammary gland for Chinese Holstein Cattle

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