eoe sub articles

EoE Sub Articles

All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board.
1. Preparation of solutions and materials
<ol>
	<li>Prepare Ringer&#39;s solution by mixing 123.3 mM NaCl, 1.53 mM CaCl2, 4.96 mM KCl, 0.809 mM Na2HPO4, and 0.147 mM KH2PO4 (see Table of Materials). Adjust pH to 7.4 and filter sterilize into 100 mL bottles. Stor...

isolating cranial neural folds from a chick embryo for a neural crest cell culture

Source: Jacques-Fricke, B. T., et al. <a href="https://app.jove.com/v/63799">Preparation and Morphological Analysis of Chick Cranial Neural Crest Cell Cultures.</a> J. Vis. Exp. (2022).
This video illustrates a technique for isolating cranial neural folds from the midbrain region of chick embryos. It presents a detailed dissection process of the neural folds, their placement, and attachment on fibronectin-coated coverslips, followed by the observation of neural crest cell migration from the neural folds.

<img alt="Figure 1" src="/files/ftp_upload/22537/22537_Figure1.jpg" /> 
Figure 1. Dissection of chick dorsal neural folds. Working in Ringer&#39;s P/S, spring scissors were used to excise neural folds. (A) Embryo dorsal view, anterior toward the top of the figure. Neural folds appear more opaque than the surrounding tissue. Midbrain neural folds lie posterior to the optic lobes (pink) and anterior to the cardiac crescent (yellow). (B)</strong...

Isolating Cranial Neural Folds From a Chick Embryo for a Neural Crest Cell Culture

All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board.
1. ...

Take a chick embryo supported within a filter paper frame and position it under a dissecting microscope.
Remove the vitelline membrane, a protective coating surrounding the embryo.
Identify the midbrain neural folds located posterior to the optic lobes and anterior to the cardiac crescent, the embryonic precursor of the mature heart.
The neural folds contain premigratory neural crest cells, which are multipotent stem cells that transform into migratory cells during development.
These migratory cells differentiate into neuronal and non-neuronal cells.
Excise the dorsal-most aspect of the neural folds and transfer the tissue to a culture dish containing buffer.
Next, place coverslips coated with an adhesion protein in culture plate wells containing media.
Transfer the neural folds onto the coated coverslips. Incubate to facilitate tissue attachment.
During culturing, migratory neural crest cells emerge from the neural folds onto the coated surface, establishing a neural crest cell culture.

isolating-cranial-neural-folds-from-chick-embryo-for-neural-crest

Research

JoVE Encyclopedia of Experiments

Neuroscience

Neuronal Culture Techniques

Advanced Neuronal Models

Culturing and Manipulation of O9-1 Neural Crest Cells

Neural crest cells (NCCs) are migrating multipotent stem cells that can differentiate into different cell types and give rise to multiple tissues and organs. The O9-1 cell line is derived from the endogenous mouse embryonic NCCs and maintains its multipotency. However, under specific culture conditions, O9-1 cells can differentiate into different cell types and be utilized in a wide range of research applications. Recently, with the combination of mouse studies and O9-1 cell studies, we have shown that the Hippo signaling pathway effectors Yap and Taz play important roles in neural crest-derived craniofacial development. Although the culturing process for O9-1 cells is more complicated than that used for other cell lines, the O9-1 cell line is a powerful model for investigating NCCs in vitro. Here, we present a protocol for culturing the O9-1 cell line to maintain its stemness, as well as protocols for differentiating O9-1 cells into different cell types, such as smooth muscle cells and osteoblasts. In addition, protocols are described for performing gene loss-of-function studies in O9-1 cells by using CRISPR-Cas9 deletion and small interfering RNA-mediated knockdown.

O9-1 is a multipotent mouse neural crest cell line. Here we describe detailed step-by-step protocols for culturing O9-1 cells, differentiating O9-1 cells into specific cell types, and genetically manipulating O9-1 cells by using siRNA-mediated knockdown or CRISPR-Cas9 genome editing.

Neural crest cells (NCCs) are migrating multipotent stem cells that can differentiate into different cell types and give rise to multiple tissues and ...

JoVE Journal

Genetics

Dissection, Culture and Analysis of Primary Cranial Neural Crest Cells from Mouse for the Study of Neural Crest Cell Delamination and Migration

Over the past several decades there has been an increased availability of genetically modified mouse models used to mimic human pathologies. However, the ability to study cell movements and differentiation in vivo is still very difficult. Neurocristopathies, or disorders of the neural crest lineage, are particularly challenging to study due to a lack of accessibility of key embryonic stages and the difficulties in separating out the neural crest mesenchyme from adjacent mesodermal mesenchyme. Here, we set out to establish a well-defined, routine protocol for the culture of primary cranial neural crest cells. In our approach we dissect out the mouse neural plate border during the initial neural crest induction stage. The neural plate border region is explanted and cultured. The neural crest cells form in an epithelial sheet surrounding the neural plate border, and by 24 h after explant, begin to delaminate, undergoing an epithelial-mesenchymal transition (EMT) to become fully motile neural crest cells. Due to our two-dimensional culturing approach, the distinct tissue populations (neural plate versus premigratory and migratory neural crest) can be readily distinguished. Using live imaging approaches, we can then identify changes in neural crest induction, EMT and migratory behaviors. The combination of this technique with genetic mutants will be a very powerful approach for understanding normal and pathological neural crest cell biology.

This protocol describes the dissection and culture of cranial neural crest cells from mouse models, primarily for the study of cell migration. We describe the live imaging techniques used and the analysis of speed and cell shape changes.

Over the past several decades there has been an increased availability of genetically modified mouse models used to mimic human pathologies. However, the ...

Developmental Biology

In Vitro Investigation of the Effects of the Hyaluronan-Rich Extracellular Matrix on Neural Crest Cell Migration

Neural crest cells (NCCs) are highly migratory cells that originate from the dorsal region of the neural tube. The emigration of NCCs from the neural tube is an essential process for NCC production and their subsequent migration toward target sites. The migratory route of NCCs, including the surrounding neural tube tissues, involves hyaluronan (HA)-rich extracellular matrix. To model NCC migration into these HA-rich surrounding tissues from the neural tube, a mixed substrate migration assay consisting of HA (average molecular weight: 1,200-1,400 kDa) and collagen type I (Col1) was established in this study. This migration assay demonstrates that NCC cell line, O9-1, cells are highly migratory on the mixed substrate and that the HA coating is degraded at the site of focal adhesions in the course of migration. This in vitro model can be useful for further exploration of the mechanistic basis involved in NCC migration. This protocol is also applicable for evaluating different substrates as scaffolds to study NCC migration.

In Vitro Investigation of the Effects of the Hyaluronan-Rich Extracellular Matrix on Neural Crest Cell Migration

This protocol outlines an in vitro migration experiment suitable for the functional analysis of the molecules involved in the in vivo migration of neural crest cells into the hyaluronan-rich extracellular matrix.

Neural crest cells (NCCs) are highly migratory cells that originate from the dorsal region of the neural tube. The emigration of NCCs from the neural tube ...

Isolating Cranial Neural Folds From a Chick Embryo for a Neural Crest Cell Culture

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