Single Oocyte Assay
Single Oocyte Assay - Related Videos
13:18
Single Oocyte Bisulfite Mutagenesis
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Cited by 14 •
2012
Bisulfite mutagenesis is the gold standard for analyzing DNA methylation. Our modified protocol allows for DNA methylation analysis at the single-cell level and was specifically designed for individual oocytes. It can also be used for cleavage-stage embryos.
07:16
The In Vitro Single Oocyte Reporter Assay: A Technique to Study Target mRNA Translation Regulation During In Vitro Oocyte Maturation
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2025
In this video, we demonstrate that in the presence of a phosphodiester inhibitor, the oocyte cell cycle is arrested at prophase-I, during which transcribed mRNAs are stored in the absence of translation. After the release of the inhibitor, oocyte maturation resumes, and the cells enter metaphase. The signal of reporter mRNA fused with the target gene in metaphase-I indicates the activation of translational machinery and protein expression.
09:40
Functional Cloning Using a Xenopus Oocyte Expression System
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Cited by 3 •
2016
We describe a Xenopus oocyte and animal cap system for the expression cloning of genes capable of inducing a response in competent ectoderm, and discuss techniques for the subsequent analysis of such genes. This system is useful in the functional identification of a wide range of gene products.
04:16
Lentiviral Vector-Based Perivitelline Injection: A Method to Transduce the Gene of Interest Into Fertilized Single-Cell Mouse Oocytes
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2025
This video describes the pronuclear injection of lentiviral vectors into the perivitelline space of a fertilized mouse embryo. The lentivirus contains the transgene, which is incorporated into the genome of the fertilized embryo, eventually giving rise to transgenic mice.
08:00
Defining the Program of Maternal mRNA Translation during In vitro Maturation using a Single Oocyte Reporter Assay
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Cited by 4 •
2021
This protocol describes a reporter assay to study the regulation of mRNA translation in single oocytes during in vitro maturation.
FAQs
Individual measurements preserve oocyte-to-oocyte variability that pooled analyses average away. This distinction can reveal subgroups with different maturation, activation, calcium-signaling, gene-expression, protein-abundance, or metabolic responses. In developmental biology, recognizing this heterogeneity helps researchers relate properties of particular oocytes to fertilization success and early embryo development rather than relying only on population-level trends.
The assay can quantify several complementary readouts, including maturation, activation, calcium signaling, gene expression, protein abundance, and metabolic activity. Imaging can capture cellular responses over time, while molecular measurements assess composition. Considering these readouts together helps connect observable cell behavior with molecular or functional features associated with developmental competence.
Maintaining an isolated oocyte under defined conditions provides a controlled setting for measuring its response. Because the assay examines one cell, differences in the resulting readouts can be interpreted in relation to that oocyte’s own molecular, cellular, or functional state. This control supports more precise comparisons of meiotic regulation, activation, and developmental potential.
It can expose relationships between individual oocyte characteristics and subsequent developmental outcomes that remain hidden in averaged datasets. Such information is useful for refining models of early developmental processes, especially when oocytes differ in quality or competence. The approach therefore adds precision to studies of maternal factors, meiotic regulation, and variability during the earliest stages of development.
A typical workflow begins by isolating one oocyte, maintaining it under defined conditions, and selecting measurements suited to the biological question. Researchers may then use imaging or molecular readouts to quantify functional, cellular, or molecular responses. The resulting single-cell data can be compared across oocytes to characterize variability and relate measurements to developmental outcomes.
They are particularly useful when researchers need to connect oocyte quality with fertilization or early embryo development, or when population averages obscure meaningful variation. The approach also supports investigations of meiotic regulation, maternal factors, reproductive disorders, and developmental competence. These applications make the assay relevant for building more precise models of early development and oocyte function.