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Updated: Apr 26, 2026
Transcriptome Profiling of In-Vivo Produced Bovine Pre-implantation Embryos Using Two-color Microarray Platform
Published on: January 30, 2017
Stage-specific proteome signatures in early bovine embryo development
Daniela R Deutsch1, Thomas Fröhlich, Kathrin A Otte
1Laboratory for Functional Genome Analysis LAFUGA, Gene Center, ‡Molecular Animal Breeding and Biotechnology, Department of Veterinary Sciences and Gene Center, and §Institute of Anatomy, Histology and Embryology, Department of Veterinary Sciences, Ludwig-Maximilians-Universität München , Munich 81377, Germany.
Early bovine embryo development relies on maternal factors. Proteomic analysis revealed significant protein changes from zygote to 4-cell stage, highlighting key pathways for developmental monitoring.
Area of Science:
- * Reproductive biology and developmental science.
- * Proteomics and bioinformatics.
- * Mammalian embryogenesis.
Background:
- * Early embryonic development pre-genome activation relies on maternal transcripts and proteins.
- * Understanding proteome dynamics is crucial for identifying developmental markers.
- * Bovine embryos serve as a model for studying early mammalian development.
Purpose of the Study:
- * To quantitatively analyze the proteome of bovine embryos during early development (zygote, 2-cell, 4-cell stages).
- * To identify significant protein abundance changes relative to MII oocytes.
- * To explore the utility of targeted proteomics for discriminating developmental stages.
Main Methods:
- * Isobaric tagging for relative and absolute quantification (iTRAQ) to analyze proteomes of MII oocytes, zygotes, 2-cell, and 4-cell bovine embryos.
- * Quantitative proteomic analysis of 1072 proteins.
- * Targeted selected reaction monitoring (SRM) for verification and validation.
Main Results:
- * 87 out of 1072 quantified proteins showed significant abundance differences across developmental stages.
- * Proteomes of 2-cell and 4-cell embryos significantly differed from MII oocytes, with continuous protein increases observed.
- * Bioinformatic analysis identified proteins involved in the p53 pathway, lipid metabolism, and mitosis.
- * SRM analysis confirmed iTRAQ results and demonstrated that a panel of five proteins could discriminate between all four stages.
Conclusions:
- * Significant proteome shifts occur during early bovine embryonic development, independent of embryonic gene activation.
- * Proteins involved in key cellular processes like the p53 pathway, lipid metabolism, and mitosis are dynamically regulated.
- * Targeted SRM assays offer a sensitive and discriminative approach for monitoring early embryonic development and detecting potential disturbances.
