Embryonic Day 12.5

Embryonic Day 12.5, often abbreviated E12.5, is a defined developmental timepoint approximately 12.5 days after fertilization in commonly used mouse models, when major embryonic structures undergo rapid growth and refinement. At this stage, coordinated cell proliferation, differentiation, migration, and tissue morphogenesis shape developing organs, while signaling interactions establish and maintain distinct tissue identities. Researchers use E12.5 embryos to examine organogenesis, congenital abnormalities, gene function, and responses to genetic or environmental perturbations. Because development progresses reproducibly by embryonic age, E12.5 provides a standardized reference for comparing anatomy, molecular expression, and developmental outcomes across experiments.

Embryonic Day 12.5 - Related Videos

Research

JoVE Journal - Biology

A System for ex vivo Culturing of Embryonic Pancreas

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Cited by 23 •

2012

Here, we describe a method for isolation, culture and manipulation of mouse embryonic pancreas. This represents an excellent ex vivo system for studying various aspects of pancreatic development, including morphogenesis, differentiation and growth. Pancreatic bud explants can be cultured for several days and used in a range of different applications, including whole-mount immunofluorescence and live imaging.

Research

JoVE Journal - Developmental Biology
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Murine Neural Plate Targeting by In Utero Nano-Injection (NEPTUNE) at Embryonic Day 7.5

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2022

In this protocol, we describe how to inject the mouse amniotic cavity at E7.5 with lentivirus, leading to uniform transduction of the entire neural plate, with minimal detrimental effects on survival or embryonic development.

An Optimized Protocol for the Efficient Radiolabeling of Gold Nanoparticles by Using a 125I-labeled Azide Prosthetic Group

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Cited by 5 •

2016

A detailed procedure for the synthesis of a 125I-labeled azide and the radiolabeling of dibenzocyclooctyne (DBCO)-group-conjugated, 13-nm-sized gold nanoparticles using a copper-free click reaction is described.

Cell Dissociation from the Tongue Epithelium and Mesenchyme/Connective Tissue of Embryonic-Day 12.5 and 8-Week-Old Mice

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Cited by 2 •

2021

We have developed a generalized protocol to dissociate a large quantity of high-quality single cells from the epithelium and mesenchyme/connective tissue of embryonic and adult mouse tongues.

Education

JoVE Core - Biology

Embryonic Stem Cells

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2019

Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease. Origin ES cells are present in the inner cell mass of an embryo at the blastocyst stage, which occurs at about 3–5 days after fertilization in humans before the embryo is implanted in the uterus.

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